CN120456200A

CN120456200A - Method and apparatus for saving power

Info

Publication number: CN120456200A
Application number: CN202411388385.3A
Authority: CN
Inventors: 李波芝; 刘丹; 张圆圆; 李正钦; 安赞濩
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2024-02-08
Filing date: 2024-09-30
Publication date: 2025-08-08
Also published as: WO2025170377A1

Abstract

The present disclosure provides a method and device for saving power, which discloses a method performed by a user equipment (UE), wherein the UE includes a first receiver and a second receiver, wherein the first receiver is a low-power receiver, and the method includes: receiving a first reference signal through the first receiver; performing cell measurement based on the first reference signal; performing cell evaluation based on the measurement result and parameters related to low-power consumption characteristics; and determining whether to trigger the second receiver to perform corresponding processing based on the cell evaluation result.

Description

Method and apparatus for saving power

Technical Field

The present invention relates generally to the field of wireless communication technology, and more particularly to a method and apparatus for saving power based on low power consumption characteristics.

Background

In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi 5G communication systems. Therefore, a 5G or quasi 5G communication system is also referred to as a "super 4G network" or a "LTE-after-system".

The 5G communication system is implemented in a higher frequency (millimeter wave) band, for example, a 60GHz band, to achieve a higher data rate. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, massive antenna techniques are discussed in 5G communication systems.

Further, in the 5G communication system, development of system network improvement is being performed based on advanced small cells, cloud Radio Access Networks (RANs), ultra dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, cooperative multipoint (CoMP), receiving-end interference cancellation, and the like.

In 5G systems, hybrid FSK and QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) as Advanced Coding Modulation (ACM), and Filter Bank Multicarrier (FBMC), non-orthogonal multiple access (NOMA) and Sparse Code Multiple Access (SCMA) as advanced access technologies have been developed.

Disclosure of Invention

The present application provides a method and apparatus for saving power to support various functions based on low power consumption characteristics.

According to one aspect of the disclosure, there is provided a method performed by a user equipment UE, the UE including a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the method including receiving a first reference signal by the first receiver, performing cell measurement based on the first reference signal, performing cell evaluation based on a measurement result and a parameter related to a low power consumption characteristic, and determining whether to trigger the second receiver to perform corresponding processing based on the cell evaluation result.

According to the embodiment of the disclosure, the cell measurement is performed based on the first reference signal, and the method comprises the step of measuring a serving cell and/or a neighbor cell based on the first reference signal.

According to the embodiment of the disclosure, the cell measurement is performed based on the first reference signal, and the method comprises the steps of obtaining configuration information related to the cell measurement, and determining signal receiving power information and/or signal receiving quality information corresponding to the first reference signal based on the first reference signal and the configuration information related to the cell measurement, wherein the configuration information related to the cell measurement comprises at least one of a measurement configuration timing period for the first reference signal, a transmission period of the first reference signal and a period of a low-power consumption wake-up signal LP-WUS.

According to the embodiment of the disclosure, the determining of the signal receiving power information and/or the signal receiving quality information corresponding to the first reference signal based on the first reference signal and the configuration information related to the cell measurement comprises the step that the UE filters the signal receiving power information and/or the signal receiving quality information corresponding to the first reference signal of the cell by using at least two measured values, wherein the determining of at least two measured value intervals is based on the period of LP-WUS in the configuration information related to the cell measurement or the measurement timing period of the first reference signal.

According to an embodiment of the present disclosure, the measurement timing configuration period of the first reference signal is greater than a maximum value of a measurement timing configuration period of a second reference signal, wherein the second reference signal is received by the second receiver.

According to the embodiment of the disclosure, the cell evaluation is performed based on the measurement result and the parameter related to the low power consumption characteristic, and the method comprises the steps of obtaining configuration information related to the cell evaluation, wherein the configuration information comprises the parameter related to the low power consumption characteristic, performing the cell evaluation based on the measurement result and the configuration information related to the cell evaluation, and the configuration information related to the cell evaluation comprises at least one of a period of a low power consumption wake-up signal LP-WUS, a discontinuous reception DRX period and a low power consumption period length.

According to the embodiment of the disclosure, the cell evaluation is performed based on the measurement result and the configuration information related to the cell evaluation, wherein the method comprises the steps of determining a low-power consumption period length based on at least one of a period of LP-WUS, a DRX period and a measurement timing configuration period of a first reference signal in the configuration information related to the cell evaluation, determining an evaluation period based on parameters related to the UE and the low-power consumption period length, and performing the cell evaluation based on the evaluation period.

According to the embodiment of the disclosure, the parameters related to the UE and the evaluation comprise at least one of parameters related to radio frequency front end link switching, scaling factors related to frequency, multiple factors related to evaluation and relaxation factors related to the relaxation degree of an evaluation period.

According to the embodiment of the disclosure, the cell evaluation is performed based on measurement results and parameters related to low-power consumption characteristics, wherein the cell evaluation comprises the steps of converting first measurement values in the measurement results based on first low-power consumption offset parameters and first low-power consumption correction parameters in the parameters related to the low-power consumption characteristics, and obtaining first evaluation results by using the converted first measurement values, wherein the first measurement values are related to signal receiving power information corresponding to the first reference signals.

According to the embodiment of the disclosure, the cell evaluation is performed based on the measurement results and the parameters related to the low-power consumption characteristics, wherein the cell evaluation comprises the steps of converting second measurement values in the measurement results based on second low-power consumption offset parameters and second low-power consumption correction parameters in the parameters related to the low-power consumption characteristics, and obtaining second evaluation results by using the converted second measurement values, wherein the second measurement values are related to signal receiving quality information corresponding to the first reference signals.

According to the embodiment of the disclosure, the cell evaluation is performed based on the measurement result and the parameter related to the low power consumption characteristic, wherein the cell evaluation comprises the step of obtaining a third evaluation result based on a threshold value related to the low power consumption characteristic in the measurement result and the parameter related to the low power consumption characteristic.

According to the embodiment of the disclosure, the cell measurement is performed based on the first reference signal, wherein the cell measurement comprises the steps of measuring a serving cell based on the first reference signal, determining whether a condition for triggering neighbor cell measurement is met based on a measurement result of the serving cell, and triggering the second receiver to perform measurement on the neighbor cell if the condition is met. Wherein the neighbor cell measurement includes at least one of measurement of an intra-frequency (intra-frequency) NR cell, an inter-frequency (inter-frequency) NR cell, and an inter-radio access technology (inter-RAT) cell indicated by the serving cell.

The embodiment of the disclosure relates to cell measurement based on the first reference signal, which comprises the steps of measuring a serving cell based on the first reference signal and measuring a neighbor cell based on a second reference signal if the UE supports the OFDM low-power consumption receiving capability.

According to the embodiment of the disclosure, the cell evaluation is performed based on the measurement result and the parameter related to the low-power consumption characteristic, and the cell evaluation method comprises the steps of sorting measurement results of neighbor cells meeting the condition, determining an optimal neighbor cell according to the sorting result, and determining whether the optimal neighbor cell is a reselection cell of the UE or not based on comparison of the measurement result of the optimal neighbor cell and the measurement result of a serving cell.

According to the embodiment of the disclosure, whether the optimal neighbor cell is a reselection cell of the UE or not is determined, wherein the determination comprises the steps of converting the measurement result of the service cell based on a third low-power-consumption offset parameter and a third low-power-consumption correction parameter in parameters related to low-power consumption characteristics, and determining whether the optimal neighbor cell is the reselection cell of the UE or not based on comparison between the measurement result of the optimal neighbor cell and the measurement result of the converted service cell.

According to the embodiment of the disclosure, the first low-power consumption offset parameter, the second low-power consumption offset parameter and the third low-power consumption offset parameter are obtained through at least one of the following steps of receiving a difference of signal values when the first receiver and the second receiver receive signals with the same power, judging whether the first receiver supports radio frequency front-end link switching, the number of radio frequency front-end links which can be switched by the first receiver, the power difference of a reference signal received by the first receiver and a reference signal received by the second receiver, and measuring jitter errors.

According to an embodiment of the present disclosure, the first low power consumption offset parameter, the second low power consumption offset parameter and the third low power consumption offset parameter are obtained by the first receiver and the second receiver measuring a difference between measurement results of respective reference signals, respectively.

According to an embodiment of the present disclosure, configuration information related to cell measurement or configuration information related to cell evaluation is obtained through a system information block.

According to an embodiment of the present disclosure, the radio frequency front end link comprises at least one of an antenna, a matching network, an antenna switch, a radio frequency switch, a filter, an amplifier, a diplexer, a multiplexer, a mixer.

According to an embodiment of the present disclosure, the first reference signal includes at least one of a low power consumption synchronization signal, a low power consumption wake-up signal, and a synchronization signal block.

According to an embodiment of the present disclosure, the second reference signal comprises a synchronization signal block SSB.

According to an embodiment of the disclosure, determining whether to trigger the second receiver for corresponding processing includes determining whether to trigger the second receiver for at least one of neighbor cell measurement, neighbor cell evaluation, cell reselection, cell selection.

According to another aspect of the disclosure, there is provided a method performed by a network node, the method comprising transmitting a first reference signal to a UE, the UE comprising a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the first reference signal being received by the first receiver, wherein cell measurements are made based on the first reference signal, wherein cell evaluations are made based on measurements and parameters related to low power consumption characteristics, wherein whether to trigger the second receiver to perform a corresponding process is determined based on the cell evaluation results.

According to an embodiment of the disclosure, the cell measurement based on the first reference signal comprises that the measurement of the serving cell and/or the neighbor cell is based on the first reference signal.

According to the embodiment of the disclosure, the method further comprises the step of sending configuration information related to cell measurement, wherein the cell measurement based on the first reference signal comprises the step of determining signal receiving power information and/or signal receiving quality information corresponding to the first reference signal based on the first reference signal and the configuration information related to the cell measurement, and the configuration information related to the cell measurement comprises at least one of a measurement timing configuration period for the first reference signal, a sending period of the first reference signal and a period of a low-power consumption wake-up signal LP-WUS.

According to the embodiment of the disclosure, the determination of the signal receiving power information and/or the signal receiving quality information corresponding to the first reference signal based on the first reference signal and the configuration information related to cell measurement comprises the steps of filtering the signal receiving power information and/or the signal receiving quality information corresponding to the first reference signal of a cell by at least two measured values, wherein at least two measured value intervals are determined based on the period of LP-WUS in the configuration information related to cell measurement or the measurement timing configuration period of the first reference signal.

According to an embodiment of the present disclosure, the measurement timing configuration period of the first reference signal is greater than a maximum value of a measurement timing configuration period of a second reference signal, wherein the second reference signal is received by a second receiver.

According to the embodiment of the disclosure, the method further comprises the step of sending configuration information related to the cell evaluation, wherein the configuration information comprises parameters related to low-power consumption characteristics, the cell evaluation is performed based on the measurement result and the parameters related to the low-power consumption characteristics, and the configuration information related to the cell evaluation comprises at least one of a period of a low-power consumption wake-up signal LP-WUS, a discontinuous reception DRX period and a low-power consumption period length.

According to the embodiment of the disclosure, the cell evaluation based on the measurement result and the configuration information related to the cell evaluation comprises that the low power consumption period length is determined based on at least one of the period of the LP-WUS, the DRX period and the measurement timing configuration period of the first reference signal in the configuration information related to the cell evaluation, the evaluation period is determined based on the parameters related to the UE and the low power consumption period length, and the cell evaluation is performed based on the evaluation period.

According to an embodiment of the disclosure, the UE evaluation-related parameters include at least one of a radio frequency front end link handover-related parameter, a frequency-related scaling factor, and an evaluation-related multiple factor.

According to the embodiment of the disclosure, the cell evaluation based on the measurement results and the parameters related to the low power consumption characteristics comprises the steps of converting a first measurement value in the measurement results based on a first low power consumption offset parameter and a first low power consumption correction parameter in the parameters related to the low power consumption characteristics, wherein the converted first measurement value is used for obtaining a first evaluation result, and the first measurement value is related to signal receiving power information corresponding to the first reference signal.

According to the embodiment of the disclosure, the cell evaluation based on the measurement results and the parameters related to the low power consumption characteristics comprises the steps of converting second measurement values in the measurement results based on second low power consumption offset parameters and second low power consumption correction parameters in the parameters related to the low power consumption characteristics, wherein the converted second measurement values are used for obtaining second evaluation results, and the second measurement values are related to signal receiving quality information corresponding to the first reference signals.

According to the embodiment of the disclosure, the cell evaluation based on the measurement result and the parameter related to the low power consumption characteristic comprises that a third evaluation result is obtained based on a threshold value related to the low power consumption characteristic in the measurement result and the parameter related to the low power consumption characteristic.

According to the embodiment of the disclosure, the cell measurement based on the first reference signal comprises the measurement of a serving cell based on the first reference signal, whether a condition for triggering neighbor cell measurement is met or not is determined based on the measurement result of the serving cell, and if so, the measurement of the neighbor cell by the second receiver is triggered, wherein the neighbor cell measurement comprises at least one of the measurement of a same-frequency NR cell, a different-frequency NR cell and a radio access inter-technology cell indicated by the serving cell.

According to the embodiment of the disclosure, the cell measurement based on the first reference signal comprises the step of measuring a serving cell based on the first reference signal, and the step of measuring a neighbor cell based on a second reference signal if the UE supports the OFDM low-power consumption receiving capability.

According to the embodiment of the disclosure, the cell evaluation based on the measurement result and the parameter related to the low power consumption characteristic comprises the steps of sorting measurement results of neighbor cells meeting the condition, determining an optimal neighbor cell according to the sorting result, and determining whether the optimal neighbor cell is a reselection cell of the UE or not based on comparison of the measurement result of the optimal neighbor cell and the measurement result of a serving cell.

According to the embodiment of the disclosure, the determination of whether the optimal neighbor cell is the reselection cell of the UE comprises the steps of converting the measurement result of the service cell based on a third low-power-consumption offset parameter and a third low-power-consumption correction parameter in parameters related to low-power consumption characteristics, and determining whether the optimal neighbor cell is the reselection cell of the UE based on comparison of the measurement result of the optimal neighbor cell and the measurement result of the converted service cell.

According to an embodiment of the present disclosure, the method further comprises transmitting configuration information related to cell measurement or cell evaluation through a system information block.

According to an embodiment of the present disclosure, wherein the determination of whether to trigger the second receiver for the respective processing comprises whether to trigger the second receiver for at least one of neighbor cell measurement, neighbor cell evaluation, cell reselection, cell selection is determined. According to another aspect of the present disclosure, there is provided a method performed by a network node, comprising obtaining first information about power boost of a reference signal, transmitting second information about power boost of the reference signal to a user equipment, UE, wherein the second information about power boost of the reference signal comprises at least one of whether to boost power of the reference signal received by a first receiver of the UE, the first receiver being a low power consumption receiver, whether to boost power of the reference signal received by a second receiver of the UE, a power boost value of the reference signal received by the first receiver, a power boost value of the reference signal received by the second receiver, and a difference between the power boost value of the reference signal received by the second receiver and the power boost of the reference signal received by the first receiver.

According to an embodiment of the disclosure, wherein obtaining the first information about the power boost of the reference signal comprises receiving information about the capability and/or type of the UE from the UE, determining the second information about the power boost of the reference signal based on the information about the capability and/or type of the UE.

According to the embodiment of the disclosure, the second information about the power boost of the reference signal is sent to the UE, wherein the second information about the power boost of the signal is sent to the UE through at least one of a system information block, signaling sent to the UE and the reference signal received by the first receiver.

According to embodiments of the present disclosure, wherein the information about the capability and/or type of the UE indicates a detection mode or a radio frequency indicator of the UE.

According to embodiments of the present disclosure, wherein the power of the reference signal received by the first receiver is not boosted, or, in case the information about the capability and/or type of the UE indicates that the UE supports detection of OFDM

In case the information about the capability and/or type of the UE indicates that the UE supports detection of OFDM, the power of the reference signal received by the first receiver is boosted and the boosted power is smaller than the boosted power in case the UE does not support detection of OFDM, or

In case the information on the capability and/or type of the UE indicates that the UE does not support detection of OFDM or does not receive information on the capability and/or type of the UE, the power of the reference signal received by the first receiver is boosted.

According to the embodiment of the disclosure, the reference signal received by the first receiver comprises at least one of a low-power consumption synchronous signal, a low-power consumption wake-up signal and a synchronous signal block, and the reference signal received by the second receiver comprises the synchronous signal block.

According to another aspect of the present disclosure, there is provided a method performed by a user equipment, UE, comprising transmitting first information about power boost of a reference signal to a network node, receiving second information about power boost of the reference signal from the network node, wherein the second information about power boost of the reference signal comprises at least one of whether to boost power of the reference signal received by a first receiver of the UE, the first receiver being a low power consumption receiver, whether to boost power of the reference signal received by a second receiver of the UE, a power boost value of the reference signal received by the first receiver, a power boost value of the reference signal received by the second receiver, and a difference between the power boost value of the reference signal received by the second receiver and the power boost of the reference signal received by the first receiver.

According to an embodiment of the present disclosure, wherein sending first information about power boost of a reference signal to a network node comprises:

transmitting information about the capabilities and/or type of the UE to the network node;

Wherein second information about power boost of the reference signal is determined based on information about capability and/or type of the UE.

According to an embodiment of the present disclosure, wherein receiving second information about power boost of a reference signal from a network node comprises receiving the second information about power boost of a signal from a network node through at least one of a system information block, signaling sent to a UE, a reference signal received through a first receiver.

According to the embodiment of the disclosure, in the case that the information about the capability and/or the type of the UE indicates that the UE supports the detection of OFDM, the power of the reference signal received by the first receiver is not boosted, or in the case that the information about the capability and/or the type of the UE indicates that the UE supports the detection of OFDM, the power of the reference signal received by the first receiver is boosted and the boosted power is smaller than the boosted power in the case that the UE does not support the detection of OFDM, or in the case that the information about the capability and/or the type of the UE indicates that the UE does not support the detection of OFDM, or the information about the capability and/or the type of the UE is not received, the power of the reference signal received by the first receiver is boosted.

According to another aspect of the disclosure, there is provided a method performed by a user equipment, UE, the UE comprising a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the method comprising receiving a reference signal by the second receiver using at least one of a plurality of radio frequency front end links of the UE, and receiving the reference signal by the first receiver based on switching using at least one of any of the plurality of radio frequency front end links in case of radio resource management offloading to the first receiver.

According to the embodiment of the disclosure, the reference signal is received by a first receiver, wherein the first receiver circularly uses each of at least one path of any of the radio frequency front-end links to receive the reference signal.

According to the embodiment of the disclosure, the method for receiving the reference signals through the first receiver comprises the steps of selecting one radio frequency front end link from any of the radio frequency front end links based on the reference signal measurement result of each of any of the at least one radio frequency front end link after the first receiver circularly uses each of the at least one radio frequency front end link to receive the reference signals, receiving the reference signals through the first receiver by using the selected one radio frequency front end link, and circularly executing the selection and receiving processing.

According to another aspect of the present disclosure, there is provided a user equipment, UE, comprising at least one transceiver configured to receive and transmit signals, at least one processor coupled with the at least one transceiver and configured to perform a method according to an embodiment of the present disclosure.

According to another aspect of the present disclosure, there is provided a network node comprising at least one transceiver configured to receive and transmit signals, at least one processor coupled with the at least one transceiver and configured to perform a method according to an embodiment of the present disclosure.

According to another aspect of the disclosure, there is provided a method performed by a user equipment UE, the UE including a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the method including the UE receiving a first reference signal via the first receiver, performing cell measurement based on the first reference signal, performing cell evaluation based on a measurement result and a parameter related to low power consumption, and determining whether to trigger the second receiver to perform corresponding processing based on the cell evaluation result.

According to an embodiment of the disclosure, cell measurement is performed based on the first reference signal, including measurement of a serving cell and/or a neighbor cell in an idle state and/or an RRC inactive state based on the first reference signal.

According to the embodiment of the disclosure, the cell measurement is performed based on the first reference signal, and the method comprises the steps of obtaining configuration information related to the cell measurement, and determining signal receiving power information and/or signal receiving quality information corresponding to the first reference signal based on the first reference signal and the configuration information related to the cell measurement, wherein the configuration information related to the cell measurement comprises at least one of a measurement timing configuration period based on the first reference signal, a period of the first reference signal, a power configuration of the first reference signal, a base station power boost gain and a configuration parameter of a low power consumption wake-up signal LP-WUS, and the configuration parameter of the low power consumption wake-up signal LP-WUS at least comprises at least one of a paging indication, a WUS period, a UE group, a UE subgroup, a UE ID and a system information indication.

According to an embodiment of the disclosure, the low power consumption related parameters include a first measurement bias related to at least one of first parameter information configured by a network, second parameter information calculated by a UE, third parameter information related to UE radio frequency implementation, and a measurement margin.

According to an embodiment of the present disclosure, the first parameter information is related to at least one of power boost related configuration information and/or the second parameter information is related to at least one of a sensitivity difference between the first receiver and the second receiver, a measurement result difference obtained by using the first reference signal and the second reference signal for measurement, and/or the third parameter information is related to at least one of an antenna structure of the first receiver and the second receiver related to the UE radio frequency implementation.

According to an embodiment of the present disclosure, performing cell evaluation based on a measurement result and a low power consumption related parameter includes determining a first measurement bias based on the measurement result and the low power consumption related parameter, scaling the measurement result, and performing cell evaluation based on the first measurement bias and the scaled measurement result.

According to an embodiment of the disclosure, scaling the measurement results and performing cell evaluation based on the first measurement offset and scaled measurement results includes scaling the measurement results based on a first receiver structure related parameter and/or a first low power consumption correction parameter, and performing cell evaluation based on the first measurement offset and scaled measurement results.

According to an embodiment of the disclosure, cell measurement is performed based on the first reference signal, and the method comprises the steps of determining a reference signal receiving power and/or a reference signal receiving quality measurement result corresponding to the first reference signal based on the first reference signal and configuration information related to cell measurement, and filtering the measurement result based on a measurement interval related to a first receiver.

According to an embodiment of the present disclosure, the measurement interval is related to at least one parameter of a measurement timing configuration period based on a first reference signal in configuration information related to cell measurement, a measurement period of the first reference signal, a discontinuous reception, DRX, period.

According to an embodiment of the present disclosure, the measurement timing configuration period based on the first reference signal is greater than a maximum value of a measurement timing configuration period based on a second reference signal, wherein the second reference signal is received by the second receiver.

According to an embodiment of the disclosure, the method comprises the steps of determining the number of cell evaluation granularity and/or the period based on at least one of a relaxation factor related to a first receiver, a radio frequency antenna switching factor, an evaluation granularity, a DRX period relaxation ratio and a scaling factor related to frequency, determining whether a cell evaluation criterion is met or not according to the measurement result, cell evaluation related configuration information containing low-power consumption related parameters and the number of cell evaluation granularity and/or the period, determining whether a second receiver is triggered to perform corresponding processing or not based on the cell evaluation result, and triggering the second receiver to perform cell reselection or cell selection if the cell evaluation criterion is met.

According to the embodiment of the disclosure, the configuration information related to the cell evaluation further comprises at least one of a period of the low power consumption wake-up signal LP-WUS, a discontinuous reception DRX period, a low power consumption period length and a measurement timing period of the first reference signal.

According to an embodiment of the present disclosure, the evaluation granularity includes a first evaluation granularity associated with a first receiver and a second evaluation granularity associated with a second receiver,

Wherein the first evaluation granularity is determined by determining a first evaluation granularity associated with a first receiver in at least one of a period of a first reference signal, a DRX period, and a measurement timing configuration period of the first reference signal in the configuration information associated with cell evaluation.

According to an embodiment of the present disclosure, the cell evaluation criterion is related to at least one of a cell selection evaluation criterion threshold, a cell selection reception level value, a cell quality value, wherein the cell selection evaluation criterion threshold is a first threshold related to a first receiver or a second threshold related to a second receiver.

According to the embodiment of the disclosure, the cell evaluation comprises the steps of determining whether the condition for triggering the second receiver is met or not based on the measurement result and the parameter related to low power consumption, waking up the second receiver and triggering neighbor cell measurement and/or serving cell measurement.

According to the embodiment of the disclosure, the cell measurement is performed based on the first reference signal, wherein the cell measurement comprises the measurement of a serving cell based on the first reference signal, and the measurement of a neighbor cell based on the first reference signal if the neighbor cell supports the low power consumption characteristic.

According to the embodiment of the disclosure, the method further comprises the step that the UE supports the Orthogonal Frequency Division Multiplexing (OFDM) low-power consumption receiving capability, the first receiver is triggered, and the second receiver measures the serving cell and the adjacent cell based on the second reference signal.

According to the embodiment of the disclosure, the measurement of the neighbor cell based on the second reference signal comprises determining the beam quantity of the corresponding second reference signal required to be measured by the first receiver based on the first receiver indicated by the first receiver for the first receiver supporting the OFDM low-power receiving capability, and performing the RRM relaxation measurement of the neighbor cell based on the second reference signal received by the first receiver.

According to the embodiment of the disclosure, the method further comprises the steps of scaling the measurement results of the adjacent cells of the first receiver, processing the scaled measurement results based on the second measurement bias, sorting the processed measurement results and the measurement results of the adjacent cells of the second receiver, and reselecting to the highest-sorting cell according to the sorting result.

In accordance with an embodiment of the present disclosure, the second measurement bias is related to at least one of first parameter information configured by the network, second parameter information calculated by the UE, third parameter information related to UE radio frequency implementation, UE radio frequency link automatic gain control inaccuracy, other measurement margin.

According to another aspect of the disclosure, a method performed by a network node is provided, the method includes sending a low-power consumption wake-up signal to a UE, determining the number of wake-up successes of the UE, and determining a UE measurement result according to the total number of accumulated sending times and the number of wake-up successes of the UE after the low-power consumption wake-up signal of a preset number of times is sent.

According to the embodiment of the disclosure, the method comprises the steps that before the low-power consumption wake-up signal is sent to the UE, the network node sends a message for entering or activating the test mode to the UE and receives a response message ACK reported by the UE, and after the last low-power consumption wake-up signal is sent to the UE, the network node sends a message for exiting or deactivating the test mode to the UE and receives the response message ACK reported by the UE.

According to an embodiment of the disclosure, the sending the low power consumption wake-up signal to the UE includes at least one of a true low power consumption wake-up signal and a pseudo low power consumption wake-up signal, where the true low power consumption wake-up signal is a low power consumption wake-up signal for waking up the UE to be tested, and the pseudo low power consumption wake-up signal is a low power consumption wake-up signal or noise for waking up other UEs.

According to an embodiment of the disclosure, determining the UE measurement result includes calculating at least one of a missed detection rate and a false wake-up rate, where the missed detection rate is determined based on a cumulative total number of true low power wake-up signals and a corresponding number of wake-up successes, and the false wake-up rate is determined based on a UE wake-up successes corresponding to a false low power wake-up signal and a cumulative total number of false low power wake-up signals.

According to an embodiment of the disclosure, the network node sends a message to the UE to enter the test mode in a connected state, wherein the network node sends a low power wake-up signal to the UE in an idle state, an inactive state, or a connected state.

According to an embodiment of the present disclosure, the message for entering or activating the test mode includes content indicating a specific behavior of the first receiver of the UE after receiving the low power consumption wake-up signal, and/or an exit condition that the first receiver of the UE no longer maintains the specific behavior, where the exit condition is a preset value of a cumulative total number of times the low power consumption wake-up signal is sent by the network node to the UE.

According to an embodiment of the disclosure, the interval between the network node sending the low power consumption wake-up signal to the UE is a preset time interval.

According to another aspect of the present disclosure, there is provided a method performed by a user equipment UE, the UE including a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the method including receiving, by the second receiver, a message entering or activating or exiting or deactivating a test mode issued by a network node, sending a response message to the network node, the test mode indicating a specific behavior of the first receiver of the UE after receiving a low power consumption wake-up signal.

According to the embodiment of the disclosure, the specific behavior is represented by that after the first receiver of the UE receives the low-power consumption wake-up signal, the first receiver of the UE accumulates the successful wake-up times (but does not wake up the second receiver) until an exit condition is satisfied, where the exit condition is that the accumulated total times of the low-power consumption wake-up signals sent by the network node to the UE reaches a preset value, or the UE exits or deactivates the test mode state.

According to the embodiment of the disclosure, when the UE exits or deactivates the test mode state, or when the exit condition of the test mode is met, the first receiver of the UE wakes up the second receiver, and the second receiver reports the accumulated total number of times of successful wake-up during the activation of the test mode to the network node, wherein the exit condition is that the accumulated total number of times of low-power consumption wake-up signals sent by the network node to the UE reaches a preset value, or the UE exits or deactivates the test mode state.

According to the embodiment of the disclosure, the method comprises the steps of receiving a message of entering or activating or exiting or deactivating a test mode sent by a network node through a second receiver and sending a response message ACK to the network node, wherein the specific behavior of a first receiver of UE after receiving a low-power consumption wake-up signal during the activation of the test mode is carried out in an idle state, a non-activated state or a connected state.

According to another aspect of the disclosure, there is provided a method performed by a network node, the method comprising transmitting a first reference signal to a UE to cause the UE to perform cell measurement based on the first reference signal, the UE including a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the first reference signal being received by the first receiver, the UE transmitting evaluation related information related to the first receiver to cause the UE to perform cell evaluation based on a measurement result, a parameter related to low power consumption, and the evaluation related information, and determining whether to trigger the second receiver to perform corresponding processing based on a cell evaluation result.

According to another aspect of the present disclosure, there is provided a method performed by a network node, comprising obtaining first information about power boost of a reference signal, transmitting second information about power boost of the reference signal to a user equipment, UE, wherein the second information about power boost of the reference signal comprises at least one of whether to boost power of the reference signal received by a first receiver of the UE, the first receiver being a low power consumption receiver, whether to boost power of the reference signal received by a second receiver of the UE, a power boost value of the reference signal received by the first receiver, a power boost value of the reference signal received by the second receiver, and a difference between the power boost value of the reference signal received by the second receiver and the power boost of the reference signal received by the first receiver.

According to another aspect of the present disclosure, there is provided a user equipment, UE, comprising at least one transceiver configured to receive and transmit signals, at least one processor coupled with the at least one transceiver and configured to perform the method according to any one of the embodiments of the present disclosure.

According to another aspect of the present disclosure, there is provided a network node comprising at least one transceiver configured to receive and transmit signals, at least one processor coupled with the at least one transceiver and configured to perform the method according to any one of the embodiments of the present disclosure.

According to the embodiment of the disclosure, the technical effect of saving power is achieved by performing relevant configuration or measurement on the signal with the low power consumption characteristic, or improving detection of the signal with the low power consumption characteristic, or combining the configuration of the network equipment and the type and the capability of the user equipment to adjust the corresponding measurement and wake-up method.

Drawings

Fig. 1 illustrates an example wireless network in accordance with various embodiments of the present disclosure;

Fig. 2a and 2b illustrate example wireless transmit and receive paths according to this disclosure;

Fig. 3a shows an example user equipment UE according to the present disclosure;

Fig. 3b illustrates an example base station according to this disclosure;

fig. 4 is a schematic diagram of a UE supporting low power consumption characteristics according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of two measurement intervals according to an embodiment of the present disclosure;

fig. 6 is a schematic diagram of a mobility scenario (serving cell with overlapping area with neighbor cells) according to an embodiment of the present disclosure;

Fig. 7 is a flow chart of cell reselection in accordance with an embodiment of the present disclosure;

fig. 8 is a schematic diagram of a mobility scenario (serving cell and neighbor cell have no overlapping area) according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of an antenna configuration (LR architecture with independent single antenna) according to a comparative example;

fig. 10 is a schematic diagram of an antenna configuration (LR architecture of one antenna sharing MR) according to a comparative example;

fig. 11 is a schematic diagram of an antenna configuration according to an embodiment of the present disclosure;

Fig. 12 is a schematic diagram of an antenna operating mode (polling mode) according to an embodiment of the present disclosure;

fig. 13 is a schematic diagram of an antenna operating mode (poll antenna + fixed antenna mode) according to an embodiment of the present disclosure;

Fig. 14 is a block diagram of a user equipment, UE, or network node according to an embodiment of the present disclosure;

Fig. 15 is a schematic diagram of a UE receiver structure with LR and MR in accordance with an embodiment of the present disclosure;

Fig. 16 is a flowchart of a prior art energy-saving RRM measurement method using LR;

FIG. 17 is a schematic diagram of the problems associated with the prior art energy-efficient RRM measurement method using LR;

fig. 18 is an overall flowchart of power saving RRM measurement using LR and MR synergy according to an embodiment of the present disclosure;

FIG. 19 is a schematic diagram of an SMTC measurement window and measurement intervals according to an embodiment of the disclosure;

FIG. 20 is a process diagram of MR wakeup in different scenarios according to an embodiment of the present disclosure;

FIG. 21 is a schematic diagram of an LR performance testing method in idle mode according to an embodiment of the disclosure;

FIG. 22 is a schematic diagram of a scenario of neighbor cell relaxation measurement according to an embodiment of the present disclosure;

FIG. 23 is a schematic diagram of a conventional test method and problematic;

FIG. 24 is a schematic diagram of a defect of LR architecture with independent single antenna;

Fig. 25 is a schematic diagram of an antenna structure for FR2, where the UE uses LR designed as a subset of MRs, according to an embodiment of the disclosure.

Detailed Description

Fig. 1 illustrates an example wireless network 100 in accordance with various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in fig. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of this disclosure.

The wireless network 100 includes a gndeb (gNB) 101, a gNB 102, and a gNB 103.gNB 101 communicates with gNB 102 and gNB 103. The gNB 101 is also in communication with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data network.

Other well-known terms, such as "base station" or "access point," can be used instead of "gNodeB" or "gNB," depending on the network type. For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to the network infrastructure components that provide wireless access for remote terminals. Also, other well-known terms, such as "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user equipment", can be used instead of "user equipment" or "UE", depending on the type of network. For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses the gNB, whether the UE is a mobile device (such as a mobile phone or smart phone) or a fixed device (such as a desktop computer or vending machine) as is commonly considered.

The gNB 102 provides wireless broadband access to the network 130 for a first plurality of User Equipment (UEs) within the coverage area 120 of the gNB 102. The first plurality of UEs includes UE 111, which may be located in a Small Business (SB), UE 112, which may be located in an enterprise (E), UE 113, which may be located in a WiFi Hotspot (HS), UE 114, which may be located in a first residence (R), UE 115, which may be located in a second residence (R), and UE 116, which may be a mobile device (M), such as a cellular telephone, wireless laptop, wireless PDA, etc. The gNB 103 provides wireless broadband access to the network 130 for a second plurality of UEs within the coverage area 125 of the gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of the gNBs 101-103 are capable of communicating with each other and with UEs 111-116 using 5G, long Term Evolution (LTE), LTE-A, wiMAX, or other advanced wireless communication technologies.

The dashed lines illustrate the approximate extent of coverage areas 120 and 125, which are shown as approximately circular for illustration and explanation purposes only. It should be clearly understood that coverage areas associated with the gnbs, such as coverage areas 120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gnbs and the variations in the radio environment associated with natural and man-made obstructions.

As described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 includes a 2D antenna array as described in embodiments of the disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook designs and structures for systems with 2D antenna arrays.

Although fig. 1 shows one example of a wireless network 100, various changes can be made to fig. 1. For example, the wireless network 100 can include any number of gnbs and any number of UEs in any suitable arrangement. Also, the gNB 101 is capable of communicating directly with any number of UEs and providing those UEs with wireless broadband access to the network 130. Similarly, each gNB 102-103 is capable of communicating directly with the network 130 and providing direct wireless broadband access to the network 130 to the UE. Furthermore, the gnbs 101, 102, and/or 103 can provide access to other or additional external networks (such as external telephone networks or other types of data networks).

Fig. 2a and 2b illustrate example wireless transmit and receive paths according to this disclosure. In the following description, transmit path 200 can be described as implemented in a gNB (such as gNB 102), while receive path 250 can be described as implemented in a UE (such as UE 116). However, it should be understood that the receive path 250 can be implemented in the gNB and the transmit path 200 can be implemented in the UE. In some embodiments, receive path 250 is configured to support codebook designs and structures for systems with 2D antenna arrays as described in embodiments of the present disclosure.

The transmit path 200 includes a channel coding and modulation block 205, a serial-to-parallel (S-to-P) block 210, an inverse N-point fast fourier transform (IFFT) block 215, a parallel-to-serial (P-to-S) block 220, an add cyclic prefix block 225, and an up-converter (UC) 230. The receive path 250 includes a down-converter (DC) 255, a remove cyclic prefix block 260, a serial-to-parallel (S-to-P) block 265, an N-point Fast Fourier Transform (FFT) block 270, a parallel-to-serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

In transmit path 200, a channel coding and modulation block 205 receives a set of information bits, applies coding, such as Low Density Parity Check (LDPC) coding, and modulates input bits, such as with Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM), to generate a sequence of frequency domain modulation symbols. A serial-to-parallel (S-to-P) block 210 converts (such as demultiplexes) the serial modulation symbols into parallel data to generate N parallel symbol streams, where N is the number of IFFT/FFT points used in the gNB 102 and UE 116. The N-point IFFT block 215 performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. Parallel-to-serial block 220 converts (such as multiplexes) the parallel time-domain output symbols from N-point IFFT block 215 to generate a serial time-domain signal. The add cyclic prefix block 225 inserts a cyclic prefix into the time domain signal. Up-converter 230 modulates (such as up-converts) the output of add cyclic prefix block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at baseband before being converted to RF frequency.

The RF signal transmitted from the gNB 102 reaches the UE 116 after passing through the wireless channel, and an operation inverse to that at the gNB 102 is performed at the UE 116. Down-converter 255 down-converts the received signal to baseband frequency and remove cyclic prefix block 260 removes the cyclic prefix to generate a serial time domain baseband signal. Serial-to-parallel block 265 converts the time-domain baseband signal to a parallel time-domain signal. The N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency domain signals. Parallel-to-serial block 275 converts the parallel frequency domain signals into a sequence of modulated data symbols. The channel decoding and demodulation block 280 demodulates and decodes the modulation symbols to recover the original input data stream.

Each of the gnbs 101-103 may implement a transmit path 200 that is similar to transmitting to UEs 111-116 in the downlink and may implement a receive path 250 that is similar to receiving from UEs 111-116 in the uplink. Similarly, each of the UEs 111-116 may implement a transmit path 200 for transmitting to the gNBs 101-103 in the uplink and may implement a receive path 250 for receiving from the gNBs 101-103 in the downlink.

Each of the components in fig. 2a and 2b can be implemented using hardware alone, or using a combination of hardware and software/firmware. As a specific example, at least some of the components in fig. 2a and 2b may be implemented in software, while other components may be implemented by configurable hardware or a mixture of software and configurable hardware. For example, the FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, wherein the value of the point number N may be modified depending on the implementation.

Further, although described as using an FFT and an IFFT, this is illustrative only and should not be construed as limiting the scope of the present disclosure. Other types of transforms can be used, such as Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be appreciated that for DFT and IDFT functions, the value of the variable N may be any integer (such as 1,2, 3,4, etc.), while for FFT and IFFT functions, the value of the variable N may be any integer that is a power of 2 (such as 1,2, 4, 8, 16, etc.).

Although fig. 2a and 2b show examples of wireless transmission and reception paths, various changes may be made to fig. 2a and 2b. For example, the various components in fig. 2a and 2b can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. Also, fig. 2a and 2b are intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communications in a wireless network.

Fig. 3a shows an example UE 116 according to this disclosure. The embodiment of UE 116 shown in fig. 3a is for illustration only, and UEs 111-115 of fig. 1 can have the same or similar configuration. However, the UE has a variety of configurations, and fig. 3a does not limit the scope of the present disclosure to any particular embodiment of the UE.

UE 116 includes an antenna 305, a Radio Frequency (RF) transceiver 310, transmit (TX) processing circuitry 315, a microphone 320, and Receive (RX) processing circuitry 325.UE 116 also includes speaker 330, processor/controller 340, input/output (I/O) interface 345, input device(s) 350, display 355, and memory 360. Memory 360 includes an Operating System (OS) 361 and one or more applications 362.

RF transceiver 310 receives an incoming RF signal from antenna 305 that is transmitted by the gNB of wireless network 100. The RF transceiver 310 down-converts the incoming RF signal to generate an Intermediate Frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuit 325, where RX processing circuit 325 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. The RX processing circuit 325 sends the processed baseband signals to a speaker 330 (such as for voice data) or to a processor/controller 340 (such as for web-browsing data) for further processing.

TX processing circuitry 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, email, or interactive video game data) from processor/controller 340. TX processing circuitry 315 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceiver 310 receives outgoing processed baseband or IF signals from TX processing circuitry 315 and up-converts the baseband or IF signals to RF signals for transmission via antenna 305.

Processor/controller 340 can include one or more processors or other processing devices and execute OS 361 stored in memory 360 to control the overall operation of UE 116. For example, processor/controller 340 may be capable of controlling the reception of forward channel signals and the transmission of reverse channel signals by RF transceiver 310, RX processing circuit 325, and TX processing circuit 315 in accordance with well-known principles. In some embodiments, processor/controller 340 includes at least one microprocessor or microcontroller.

Processor/controller 340 is also capable of executing other processes and programs resident in memory 360, such as operations for channel quality measurement and reporting for systems having 2D antenna arrays as described in embodiments of the present disclosure. Processor/controller 340 is capable of moving data into and out of memory 360 as needed to perform the process. In some embodiments, the processor/controller 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or operator. The processor/controller 340 is also coupled to an I/O interface 345, where the I/O interface 345 provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. I/O interface 345 is the communication path between these accessories and processor/controller 340.

The processor/controller 340 is also coupled to an input device(s) 350 and a display 355. An operator of UE 116 can input data into UE 116 using input device(s) 350. Display 355 may be a liquid crystal display or other display capable of presenting text and/or at least limited graphics (such as from a website). Memory 360 is coupled to processor/controller 340. A portion of memory 360 can include Random Access Memory (RAM) and another portion of memory 360 can include flash memory or other Read Only Memory (ROM).

Although fig. 3a shows one example of UE 116, various changes can be made to fig. 3 a. For example, the various components in FIG. 3a can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. As a particular example, the processor/controller 340 can be divided into multiple processors, such as one or more Central Processing Units (CPUs) and one or more Graphics Processing Units (GPUs). Moreover, although fig. 3a shows the UE 116 configured as a mobile phone or smart phone, the UE can be configured to operate as other types of mobile or stationary devices.

Fig. 3b shows an example gNB 102 in accordance with the present disclosure. The embodiment of the gNB 102 shown in fig. 3b is for illustration only, and other gnbs of fig. 1 can have the same or similar configuration. However, the gNB has a variety of configurations, and fig. 3b does not limit the scope of the disclosure to any particular embodiment of the gNB. Note that gNB 101 and gNB 103 can include the same or similar structures as gNB 102.

As shown in fig. 3b, the gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, transmit (TX) processing circuitry 374, and Receive (RX) processing circuitry 376. In certain embodiments, one or more of the plurality of antennas 370a-370n comprises a 2D antenna array. The gNB 102 also includes a controller/processor 378, a memory 380, and a backhaul or network interface 382.

The RF transceivers 372a-372n receive incoming RF signals, such as signals transmitted by UEs or other gnbs, from antennas 370a-370 n. The RF transceivers 372a-372n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signal is sent to RX processing circuit 376, where RX processing circuit 376 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. The RX processing circuit 376 sends the processed baseband signals to a controller/processor 378 for further processing.

TX processing circuitry 374 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from controller/processor 378. TX processing circuitry 374 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceivers 372a-372n receive the outgoing processed baseband or IF signals from the TX processing circuitry 374 and up-convert the baseband or IF signals to RF signals for transmission via the antennas 370a-370 n.

The controller/processor 378 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, controller/processor 378 may be capable of controlling the reception of forward channel signals and the transmission of backward channel signals via RF transceivers 372a-372n, RX processing circuit 376, and TX processing circuit 374 in accordance with well-known principles. The controller/processor 378 is also capable of supporting additional functions, such as higher-level wireless communication functions. For example, the controller/processor 378 can perform a Blind Interference Sensing (BIS) process such as that performed by a BIS algorithm and decode the received signal from which the interference signal is subtracted. Controller/processor 378 may support any of a variety of other functions in gNB 102. In some embodiments, controller/processor 378 includes at least one microprocessor or microcontroller.

Controller/processor 378 is also capable of executing programs and other processes residing in memory 380, such as a basic OS. Controller/processor 378 is also capable of supporting channel quality measurements and reporting for systems having 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller/processor 378 supports communication between entities such as web RTCs. Controller/processor 378 is capable of moving data into and out of memory 380 as needed to perform the process.

The controller/processor 378 is also coupled to a backhaul or network interface 382. The backhaul or network interface 382 allows the gNB 102 to communicate with other devices or systems through a backhaul connection or through a network. The backhaul or network interface 382 can support communication through any suitable wired or wireless connection(s). For example, when the gNB 102 is implemented as part of a cellular communication system (such as one supporting 5G or new radio access technologies or NR, LTE, or LTE-a), the backhaul or network interface 382 can allow the gNB 102 to communicate with other gnbs over wired or wireless backhaul connections. When the gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow the gNB 102 to communicate with a larger network (such as the internet) through a wired or wireless local area network or through a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure, such as an ethernet or RF transceiver, that supports communication over a wired or wireless connection.

A memory 380 is coupled to the controller/processor 378. A portion of memory 380 can include RAM and another portion of memory 380 can include flash memory or other ROM. In some embodiments, a plurality of instructions, such as BIS algorithms, are stored in memory. The plurality of instructions are configured to cause the controller/processor 378 to perform a BIS process and decode the received signal after subtracting the at least one interfering signal determined by the BIS algorithm.

As described in more detail below, the transmit and receive paths of the gNB 102 (implemented using the RF transceivers 372a-372n, TX processing circuitry 374, and/or RX processing circuitry 376) support aggregated communications with FDD and TDD cells.

Although fig. 3b shows one example of the gNB 102, various changes may be made to fig. 3 b. For example, the gNB 102 can include any number of each of the components shown in FIG. 3 a. As a particular example, the access point can include a number of backhaul or network interfaces 382, and the controller/processor 378 can support routing functions to route data between different network addresses. As another particular example, while shown as including a single instance of TX processing circuitry 374 and a single instance of RX processing circuitry 376, the gNB 102 can include multiple instances of each (such as one for each RF transceiver).

Exemplary embodiments of the present disclosure are further described below with reference to the accompanying drawings.

The text and drawings are provided as examples only to assist the reader in understanding the present disclosure. They are not intended, nor should they be construed, to limit the scope of the present disclosure in any way. While certain embodiments and examples have been provided, it will be apparent to those of ordinary skill in the art from this disclosure that variations can be made to the embodiments and examples shown without departing from the scope of the disclosure.

Wireless communication devices that use battery power have a strong need to reduce power consumption and increase standby time. To meet this demand, various power saving techniques have emerged. Such as discontinuous reception (Discontinuous Reception, abbreviated as DRX) technology, saves device power consumption by letting the primary transceiver sleep when no traffic is transmitted and wake up with either a long or short period (DRX cycle) to perform necessary signal reception according to scene needs, and in general, in a Connected state (rrc_connected) the user equipment wakes up with a short period to monitor PDCCH signals, and in an Idle state or inactive state (rrc_idle) the user equipment may wake up with a relatively long period to monitor paging (paging) signals.

Because the primary transceiver tends to be relatively powerful, it still has not little power consumption even if it wakes up periodically, especially without traffic demands, which results in wasted power consumption. The power consumption can be reduced by increasing the discontinuous reception period (DRX cycle), but at the same time, the problem of increasing the latency of the response service is also brought, so that the user experience is affected.

In order to continue to reduce device power consumption without increasing latency, a low power wake-up receiver (lower power wake up receiver, abbreviated LP-WUR, sometimes further abbreviated LR or WUR) technique has recently emerged. The main purpose of LP-WUR is to reduce the energy consumption of the UE by maintaining sleep state for a long time by the MR, to extend battery life. Referring to fig. 4, since a Main transceiver (MR) is relatively powerful, the technology adopts LR specially designed for low power consumption in a user equipment to perform necessary listening functions, such as listening to a low power consumption synchronization signal (low power synchronization signal, LP-SS) transmitted by a Network (NW) for synchronization and/or measurement, and listening to a low power consumption wake-up signal (low power wake up signal, LP-WUS) transmitted by the NW for receiving information transmitted by the network. The user equipment wakes up the MR to perform service according to the information received by the LR (e.g., a paging signal is received) if necessary, and the MR can keep a sleep state for a relatively long time when not necessary, thereby further saving power consumption. More specifically, reference is made to fig. 15. In idle mode, MR makes RRM measurements based on the always-on SSB, listening for paging signals every DRX cycle (cycle) to detect if NW sends any information. This behavior is power hungry. In idle mode, the LR may receive the LP-SS/SSs to perform RRM measurement when the MR is in sleep state, and detect the LP-WUS to wake up the MR to listen for paging signals when the NW side transmits downlink data.

Embodiments of the present disclosure include cell selection and cell reselection in idle or inactive/inactive modes.

In idle or inactive mode, after the UE has been switched on and the Public Land Mobile Network (PLMN) has been selected, the UE will perform cell selection and cell reselection, mainly focusing on the UE's behavior/requirements including measurement and evaluation of serving cells, measurement of intra-frequency (intra-frequency) NR cells, measurement of inter-frequency (inter-frequency) NR cells and inter-radio access technology (inter-RAT) E-UTRAN (Evolved UMTS Terrestrial Radio Access Network ) cells.

One of the factors that may be considered in cell selection is the applicability criterion/measurement criterion (both applicability criterion and measurement criterion may be used interchangeably in this disclosure), i.e. the S criterion. The S criteria are defined as:

Srxlev >0 and square >0

Wherein, the

Srxlev = Q_rxlevmeas – (Q_rxlevmin + Q_{rxlevminoffset} )– P_compensation- Qoffset_temp (1)

Squal = Q_qualmeas – (Q_qualmin + Q_{qualminoffset}) - Qoffset_temp (2)

In the formulas (1) and (2), srxlev is a cell selection Rx level value (dB), square is a cell selection quality value (dB), Q _rxlevmeas is a reference signal reception power value (RSRP) measured by the UE, Q _qualmeas is a reference signal reception quality value (RSRQ) measured by the UE, Q _rxlevmin is a minimum reception RSRP level value (dBm) required in a cell selection/reselection indication (NR) cell, Q _qualmin is a minimum required quality value (dB) within the cell, Q _{rxlevminoffset} is a result of periodic search for a higher priority PLMN when it is normally resident in the VPLMN, Q _{qualminoffset} is an offset to Q _qualmin of a transmission signal considered in the square evaluation when it is normally resident in the VPLMN, and P _compensation is a power compensation factor related to the UE power type, representing a cell coverage. Qoffset _temp is a temporary offset value (dB) applied to a cell for connection establishment failure.

If the UE successfully detects a cell and successfully decodes the MIB and SIB, it will not camp on/register unless the cell meets the suitability S criteria described above, srxlev >0 and Squal >0. Wherein, the reporting value of RSRP/RSRQ and the measured value meet the corresponding relation of measurement-reporting.

The cell considered for cell reselection is at least one of an intra-frequency (NR) cell, an inter-frequency (NR) NR cell, an inter-RAT E-UTRAN (Evolved UMTS Terrestrial Radio Access Network ) cell. The conditions that need to be considered for cell reselection include at least an absolute priority criterion and a radio link quality criterion. For UE power saving purposes, UE-to-neighbor (herein also referred to as neighbor cell or neighbor cell) measurements need to meet certain conditions, from which decisions need to be made on the currently camping cell to decide whether or not to make neighbor measurements, the following measurement rules are used to define whether or not cell reselection needs to be performed:

for the same-frequency cell measurement, when the serving cell satisfies Srxlev > S _IntraSearchP and Squal > S _IntraSearchQ, the UE does not need to perform the same-frequency neighbor measurement or stop the same-frequency neighbor measurement, otherwise, the UE needs to perform the same-frequency neighbor measurement.

For inter-frequency and inter-radio access technology cell measurements, because in inter-frequency cell measurements there are multiple frequency layers present, reselection priorities for these frequency layers need to be considered, which are configured in the system information SIB (e.g., SIB4 or SIB 5), the UE will attempt to check priorities only between those cells specified in the SIB.

For the same frequency cell and different frequency cells with the same priority, the cell reselection criteria include:

Firstly, neighbor cell measurement is started to obtain measurement results of a plurality of candidate cells, and neighbor cells meeting a cell selection criterion, namely an S criterion, are selected, wherein Srxlev is less than or equal to SIntraSearchP or square is less than or equal to SINTRASEARCHQ. And judging whether R criterion (Ranking) is met or not according to the neighbor cells meeting the conditions, namely Ranking criterion according to the RSRP result. And then selecting the cell with the best RSRP result as the target neighbor cell.

Wherein the cell queuing criterion Rs for the serving cell and Rn of the neighbor cell are defined as

R_s＝Q_meas,s+Q_Hyst-Qoffset_temp (3)

R_n＝Q_meas,n+Qoffset-Qoffset_temp (4)

In the formulas (3) and (4), Q _meas is RSRP quality considered in cell reselection, the small labels s and n correspond to a measurement cell and a target cell, respectively, qoffset is a cell offset, Q _Hyst is a cell reselection hysteresis value, qoffset _temp is a temporary offset value (dB) applied to the cell, and Q _Hyst.

The UE needs to make RSRP and RSRQ measurements for the serving cell using the reference signals. And the UE needs to perform measurement filtering (filtering) on the SS-RSRP value (i.e., RSRP based on SSB measurements) and the SS-RSRQ value (i.e., RSRQ based on SSB measurements) of the serving cell using at least two measurements, the interval of which is at least DRX cycle/2 in a set of measurements used for filtering, as shown in fig. 5. Also, the UE needs to evaluate whether the RSRP and RSRQ of the serving cell meet the cell selection S criterion for a period of time (evaluation period).

The configuration of the DRX cycle in NR may be 320ms, 640ms, 1280ms, or 2560ms.

The reference signal used for measurement needs to be periodic. After introduction of the LP-WUS/LP-WUR, the reference signals for which measurements can be performed may include SSB (PSS/SSS/PBCH DMRS), LP-WUS, LP-SS.

In the prior art, the UE needs to wait for the SSB of the period to make measurements, and the UE needs to measure RSRP and/or RSRQ to check the quality of the camping cell. For example, if the cell quality is below a certain threshold, the UE will make a new cell reselection. Thus, the UE may always camp on an reachable cell. The period of SSB varies between 5ms and 160ms, which is 20ms for cell definition SSB.

In addition, since the UE does not know the actual SSB transmission period of the neighbor cell, the UE needs to detect the SMTC period, i.e. the UE acquires the SMTC period/offset and duration from SIB1, and then performs SSB measurement according to the SMTC period. The SMTC period in the existing configuration is 160ms at maximum. Regarding the period LP-SS, WUR may use the period LP-SS to make RRM measurements (when MR offloads RRM measurements to LR), at least for WUR that cannot receive existing PSS/SSS. The LP-SS period is at least 320ms, and may be, for example, 320ms, 640ms, 1280ms, 2560ms, 5120ms, or 10240ms, as specific examples.

While the LP-SS may also be used for at least coarse time synchronization of the LP-WUR and at least coarse frequency synchronization of the LP-WUR.

Regarding LP-WUS, it is used to wake up the MR for normal NR procedures and may carry a portion of the paging-related information, or an index of 1 bit to paging-related information. For example, when the UE receives paging related information carried by the LP-WUS and related to the UE, the LP-WUR in the UE may activate the MR to perform normal NR steps. Since LP-WUS is a periodic signal, RRM measurements can also be performed. The period of the LP-WUS is greater than at least one DRX period to ensure successful listening in paging occasions.

As mentioned above, the current mature DRX technology has encountered a bottleneck in saving power consumption, and its power saving effect is often based on increasing delay. There are also a number of specific technical problems to be solved by the currently emerging LP-WUS/LP-WUR technology.

For example, a specially designed low-power wake-up receiver LR needs to adopt a new radio frequency architecture in order to pursue the power consumption much lower than that of MR, and the power consumption and the radio frequency performance are often difficult to be improved simultaneously, so that the network coverage can be negatively affected while the low power consumption is realized, and possibly, different radio frequency architectures also mean that different types of terminal devices have different coverage capacities, how the network devices correspondingly process to balance the current network performance, and the like.

Or the RRM measurement that the master transceiver MR needs to periodically perform is an important operation for the wireless communication terminal to maintain mobility, and after using the LP-WUS/LP-WUR technique, if the MR is awakened to perform every time the RRM measurement needs to be performed, the power saving effect of the terminal will be greatly compromised, so that it is necessary to offload the RRM measurement that is conventionally needed to be performed on the MR side to (offflowing to) LR.

A flow chart of an existing energy-efficient RRM measurement method using LR is shown in fig. 16.

In step 16-1, the UE performs cell search.

In steps 16-2 and 16-3, the network broadcasts the measurement related configuration and LR access.

In step 16-4, LR-based RRM measurements and evaluations are performed within T _serv for cell selection. Specifically, step 16-4 may include the steps of:

step 16-4-1, based on the preconfigured threshold, the UE enters into a measurement mode using LR;

step 16-4-2 based on different LR receiver structure, the UE measures the strength or quality of the downlink signal using different reference signals (e.g., LP-SS or SSs) (i.e., Q _rxlevmeasLR -

Q_qualmeasLR);

Step 16-4-3 in T _serv, the UE uses the LR-based measurement result to evaluate whether the current cell is suitable for camping.

At step 16-5, based on the LR measurements, the MR is awakened according to LR specific utility criteria.

If the LR based relaxation measurement criteria/applicability criteria are not met, the MR wakes up.

That is, if Srxlev _LR <0 or square _LR <0, the mr will be awakened, measuring all neighbors indicated by the serving cell.

However, existing LR-based energy efficient RRM measurements have a significant problem in that performance is greatly reduced when LR measurements are used. The MR may be unnecessarily awakened, rather than causing additional power consumption. Fig. 17 schematically depicts this problem. Referring to table 1 below, there is shown a point M where a UE is located in an area where the three of the serving cell MR coverage, the serving cell LR coverage, and the neighbor coverage in fig. 17 overlap, measured values based on different reference signals using LR and MR.

TABLE 1

In table 1, PC3 UE represents UE of power class3 (PowerClass) and the measurement value LP-RSRP represents LP-RSRP calculated based on LP-SS, and SS-RSRP represents LP-RSRP calculated based on SSB, srxlev is used to determine whether a cell is suitable or not.

Based on the differences between MR and LR as shown in table 2 below, the measured cell RSRP obtained using MR and LR are different, and the performance of LR may be poor. (e.g., in table 1: Q _rxlevmeasLR = -129dBm and Q _rxlevmeasMR = -125 dBm). Then Srxlev _LR and Srxlev _MR calculated by srxlev=q _rxlevmeas-(Q_rxlevmin+Q_{rxlevminoffset})-P_compensation-Qoffset_temp are different and opposite in sign according to equation (1) in the present disclosure, where values of the remaining parameters may be assumed to be the same in both cases except that different assumptions are required for Q _rxlevmeas and Q _rxlevmin in calculating Srxlev _LR and Srxlev _MR based on different reference signals.

Srxlev_MR＝Q_rxlevmeasMR-((-127)+Q_{rxlevminoffset})-P_compensation=-125+127=2>0

Srxlev_LR＝Q_rxlevmeasLR-((-127)+Q_{rxlevminoffset})-P_compensation=-129+127=-2<0

This diametrically opposite result would then result in MR and LR having opposite cell suitability decision patterns. That is, using LR may result in inaccurate UE behavior at point M and cause performance loss. That is, if LR is used, the UE-initiated neighbor measurement or reselection procedure is inaccurate. Moreover, the high false alarm rate based on LR may cause unnecessary wakeup of MR, which may bring about additional MR power consumption.

TABLE 2

Meanwhile, due to measurement inaccuracy, a UE supporting the LP-WUR characteristics may erroneously reselect to an LR coverage cell (small coverage cell) instead of a desired normal range cell (desired MR coverage cell) after erroneously detecting that the cell in which it resides does not satisfy the existing applicability criterion.

This is faced with the problem of how to scale MR and LR measurements. Under LR operation, a balance is struck between energy saving and high performance. And how to determine whether or not to wake up the MR for necessary operations such as cell selection, reselection, etc., through the measurement result of the LR. Other problems remain, for example, in the prior art, the existing SMTC period is 160ms at maximum, and the LP-SS period is 320ms,640ms,1280ms,2560ms,5120ms or 10240ms, which is insufficient to encompass the LP-SS, i.e. the existing SMTC period does not match the LP-SS period, and the appropriate measurement timing configuration period cannot be found to perform the LP-SS measurement according to the existing SMTC configuration, and the RSRP/RSRQ measurement of the RRM cannot be successfully performed.

For example, tserv for a serving cell in the prior art depends on the DRX cycle, but DRX is a basic configuration for power saving of MR. In idle mode, periodically wakes up to monitor a paging signal, or in connected mode (connected mode) periodically wakes up to monitor a PDCCH. However, the LP-SS is only a signal used by the LP-WUR, and the LP-SS and the DRX cycle (MR mechanism) are not linked at all. Therefore, if the LP-SS is to be used for evaluation, DRX cannot be applied as granularity, nor DRX/2 can be applied as interval of at least two measurement values when filtering the measurement. Thus, the existing maximum evaluation period definition is also not applicable to LP-WUR, i.e. for measurement and evaluation of serving cells, the existing interval DRX period/2 and evaluation granularity DRX period with at least two measurements is not applicable to LR.

For example, in the prior art, the evaluation procedure of the serving cell needs to consider the S criterion, and the UE needs to search for the strongest cell satisfying the S criterion based on the RSRP/RSRQ measurement result of the serving cell. And during neighbor reselection, rs in the R criterion for the serving cell also need to be based on RSRP measurements. However, due to low power consumption and low complexity LP-WUR requirements, LP-SS (signal larger than SSB period) is used and the received signal quality of the UE in the LR coverage area, as well as the calculated corresponding signal strength RSRP/RSRQ, may be small, in which case if the existing S criterion/R criterion is used, no suitable cell meeting the existing applicability criterion can be found, i.e. the existing S criterion for cell selection and the existing R criterion for cell reselection are not applicable.

For example, in the prior art, if a cell supports LP-WUS/LP-WUR deployment, i.e. supports transmitting LP-SS, and the UE supports this new feature, the cell should signal a new value in the new system information for LP-WUS/LP-WUR. Depending on the coverage area level supported and the different frequency layer priorities, these values may be different and need to be flexibly configured. Meanwhile, the existing high-overhead system information design is not a preferable design for the simple-function LP-WUS/LP-WUR in terms of overhead of the system information, and extra power consumption is brought.

The technical solution of the present invention may solve any one or more of the above-mentioned problems with the LP-WUS/LP-WUR technology, but does not mean that it is necessary to solve a plurality of or ensure the above-mentioned problems at the same time. For example, the invention proposes a new LR architecture based on a switching-based shared antenna or shared radio frequency front end based on a different frequency range (FR 1/FR 2) on the basis of a conventional LR architecture, and proposes a corresponding RRM measurement offloading (MR RRM measurement offload to LR) solution for the conventional LR architecture and the new switching-shared LR architecture, respectively.

According to an aspect of the embodiment of the invention, the coverage performance of the LP-WUS/LP-WUR terminal is improved by introducing flexible architecture design, and the application range of the power saving technology is improved.

According to another aspect of the embodiment of the invention, by introducing a new RRM measurement and decision mechanism at the LR side, the reliability of RRM measurement by using LR is improved, thereby reducing the false wake-up rate and improving the power saving effect and performance of the equipment.

According to an embodiment of the disclosure, a UE uses a first receiver to perform serving cell RRM measurements, and determines a signal received power and/or a signal received quality measurement result corresponding to the first reference signal based on the first reference signal and configuration information related to cell measurements. The UE filters the measurement results based on a measurement interval associated with the first receiver. The UE determines the first receiver first measurement bias based on at least one of first parameter information configured by the network and/or second parameter information calculated by the UE and/or third parameter information related to UE radio frequency implementation and/or other measurement margin. In combination with the first measurement bias, the UE scales measurements based on the first receiver to obtain similar measurement performance as the second receiver.

According to an embodiment of the present disclosure, wherein the UE decides the evaluation period based on at least one of a relaxation factor and/or a radio frequency antenna switching factor and/or an evaluation granularity associated with the first receiver. Based on the LR scaling measurements, the UE evaluates the cell at least once per the evaluation period based on a cell suitability criterion using a first receiver and verifies whether the cell-related suitability criterion is met. If the applicability criterion is met, the UE wakes up the second receiver to perform subsequent cell reselection or to re-perform cell selection.

Based on the parameters, measurement results and evaluation period related to the low power consumption characteristics, the UE uses the first receiver to perform service cell evaluation, and wakes up the second receiver based on the cell evaluation results and the applicability criteria related to the cell evaluation. The service cell evaluation comprises the steps of obtaining configuration information related to cell evaluation, wherein the configuration information comprises parameters related to low-power consumption characteristics, and carrying out cell evaluation based on a measurement result and the configuration information related to the cell evaluation, wherein the configuration information related to the cell evaluation comprises at least one of a period of a low-power consumption wake-up signal LP-WUS, a discontinuous reception DRX period, a low-power consumption period length and a measurement timing period of a first reference signal.

Based on parameters related to low power consumption characteristics, measurement results and an evaluation period, the UE performs cell evaluation by using a first receiver, and based on the cell evaluation results and applicability criteria related to the cell evaluation, waking up a second receiver comprises determining a first evaluation granularity related to the first receiver based on at least one of a period of a first reference signal, a DRX period and a measurement timing configuration period of the first reference signal in the configuration information related to the cell evaluation, determining an evaluation period based on the parameters related to the UE and the evaluation, and performing the cell evaluation based on the evaluation period.

According to an embodiment of the disclosure, the UE evaluation related parameters include at least one of a second evaluation granularity related to a second receiver, a first evaluation granularity related to a first receiver, a first relaxation factor related to the first receiver, a radio frequency front end link handover related parameter, a DRX cycle relaxation ratio, a frequency related scaling factor.

A second evaluation granularity associated with a second receiver is a discontinuous reception period (DRX cycle)

Based on parameters related to low power consumption characteristics, measurement results and an evaluation period, the UE uses a first receiver to conduct cell evaluation, and wakes up a second receiver based on the cell evaluation results and an applicability criterion related to the cell evaluation, wherein the method comprises the steps of determining the applicability criterion related to the serving cell evaluation based on a cell selection evaluation criterion threshold value, a cell selection reception level value and a cell quality value.

The cell selection evaluation criterion threshold may be a first threshold associated with a first receiver or a second threshold associated with a second receiver.

The neighbor cell evaluation related suitability criteria is determined based on the cell reselection evaluation criteria threshold, the cell selection reception level value, the cell quality value, the cell reselection measurement rules, and the relaxed measurement rules.

The neighbor cell reselection evaluation criterion threshold may be a third threshold associated with the first receiver and/or a fourth threshold associated with the second receiver.

Based on parameters related to low power consumption characteristics, measurement results and an evaluation period, the UE performs cell evaluation by using a first receiver, wakes up a second receiver based on the cell evaluation results and an applicability criterion related to the cell evaluation, and comprises scaling the measurement results of the first receiver based on a first receiver measurement bias, a first receiver structure related parameter and a second low power consumption correction parameter, and obtaining a first applicability criterion related to the cell evaluation based on a scaled second measurement value related to a first threshold value related to the first receiver, wherein the second measurement value is related to signal reception level value information corresponding to the first reference signal.

Based on parameters related to low power consumption characteristics, measurement results and an evaluation period, the UE performs cell evaluation by using a first receiver, wakes up a second receiver based on the cell evaluation results and an applicability criterion related to the cell evaluation, and comprises scaling the measurement results of the first receiver based on a first receiver measurement bias, a first receiver structure related parameter and a third low power consumption correction parameter, and obtaining a second applicability criterion related to the cell evaluation based on a second threshold related to the first receiver of a scaled third measurement value, wherein the third measurement value is related to signal reception quality information corresponding to the first reference signal.

The UE performs cell evaluation by using a first receiver based on parameters related to low power consumption characteristics, measurement results and evaluation periods, wakes up a second receiver based on the cell evaluation results and applicability criteria related to the cell evaluation, and comprises obtaining third applicability criteria related to the cell evaluation based on a third threshold related to the low power consumption characteristics in the parameters related to the low power consumption characteristics and the relaxation measurement results obtained by using the first receiver, and obtaining fourth applicability criteria related to the cell evaluation based on a fourth threshold related to the low power consumption characteristics in the parameters related to the low power consumption characteristics.

And carrying out service cell evaluation based on the parameters related to the low-power consumption characteristics, the measurement result and the evaluation period, and carrying out wake-up on the second receiver based on the cell evaluation result and the applicability criterion related to the cell evaluation, wherein the method comprises the steps of determining whether a condition triggering the wake-up of the second receiver is met, if so, carrying out wake-up on the second receiver by the UE, and triggering neighbor cell measurement.

According to the embodiment of the disclosure, the method comprises the step of determining whether the optimal neighbor cell is a reselection cell of the UE or not, wherein for a first receiver supporting Orthogonal Frequency Division Multiplexing (OFDM) low-power consumption receiving capability, the UE uses the first receiver to perform neighbor RRM relaxation measurement based on the beam quantity of a corresponding second reference signal which is required to be measured by the first receiver and indicated by the first receiver.

According to the embodiment of the disclosure, the UE performs comparison neighbor cell sequencing by combining the first receiver second scaling measurement result and the second receiver measurement result to obtain a mixed neighbor cell sequencing result, and the UE automatically identifies and reselects to the highest sequencing cell according to the sequencing result.

And the UE performs scaling on the measurement result of the first receiver according to the second measurement bias of the first receiver, the first receiver structure related parameter and the fourth low-power consumption correction parameter to obtain a second scaling measurement result of the first receiver.

The first receiver second measurement bias is related to at least one of:

Based on first parameter information configured by the network, and/or second parameter information calculated by the UE, and/or third parameter information related to UE radio frequency implementation, and/or UE radio frequency link automatic gain control inaccuracy, and/or other measurement margin.

Embodiments according to the invention may include one or more of the following aspects:

On the basis of the existing conventional LR architecture, a multi-antenna (and/or multi-radio-frequency front end) architecture based on switching is introduced at the LR side, the multi-antenna or multi-radio-frequency front end is shared with the MR, and the LR uses the multi-antenna in a switching mode through a radio-frequency switch. For example, embodiments in accordance with the invention may include one or more of the following:

the antenna and/or the rf front-end used by a certain frequency band of MR are identical to the antenna and/or the rf front-end used by LR in that frequency band;

The LR uses different antennas and/or radio frequency front end to receive the low power consumption synchronizing signal LP-SS sent by the network and make synchronization and/or measurement, alternatively, the terminal can fix the antenna with the best selecting signal to receive after a certain polling measurement;

The UE uses the LR for serving cell RRM measurements and performs measurement result filtering based on the measurement interval associated with the LR. Based on the first parameters configured by the network, the second parameters calculated by the UE and the third parameters related to the UE RF implementation, the UE decides the LR measurement bias. In conjunction with measuring bias parameters, the UE scales LR-based measurements to obtain similar performance to MR.

The first parameter is related to power boost. When the network device transmits a signal (e.g., LP-SS) for LR reception to the terminal device and performs power boosting (power boosting), the user device is informed of this power boosting information (whether power boosting, and or dB number of power boosting, and/or the difference between the power boosting of the reference signal (e.g., LP-SS) for LR and the power boosting of the reference signal (e.g., SSB) for MR, etc.). For example, embodiments in accordance with the invention may include one or more of the following:

1. the power boost information of the network equipment can be issued in a system information block, can be issued through signaling when the MR works, can be contained in a low-power consumption reference signal such as LP-SS, and is received and acquired by the UE through LR;

2. the power boost information can be used in the RRM measurement and decision process, and when considering the difference bias WUSoffset measured between LR and MR, the bias caused by the boost power information needs to be considered;

alternatively, the network device may decide whether to power up based on the capabilities or type of device being used.

The second parameter is related to the sensitivity (REFSENS) difference between MR and LR, and to the measurement difference using LR reference signals (REFERENCE SIGNALS, RS) and MR RS.

The third parameter is related to the UE RF LR-MR antenna structure and/or antenna sharing and switching mechanism or antenna separation mechanism.

The first parameter information is related to at least one of power boost.

The second parameter information is related to at least one of a sensitivity (REFSENS) difference between the first receiver and the second receiver and/or a measurement result difference obtained by taking measurements using the first reference signal and the second reference signal.

The third parameter information is related to at least one of an antenna structure of the first receiver-the second receiver related to the UE radio frequency implementation.

Based on the LR-related relaxation factor, the RF antenna switching factor, and the evaluation granularity, the UE decides an evaluation period. Based on the LR scaling measurements, the UE evaluates the suitability criterion, also called the relaxation measurement criterion, for the serving cell at least once per evaluation period, which criterion is based on the LR coverage. When the new applicability criterion is met, the UE wakes up the MR and performs a subsequent target cell reselection.

For supporting the new and flexible architecture (LR-MR radio frequency antenna switching architecture) terminal, different RRM measurement processes need to be performed, that is, when the user equipment performs RRM unloading, the number N of switching antennas of the user equipment needs to be considered, and according to the value of the user equipment N, a maximum evaluation period T _servLR and the like suitable for the RRM unloading need to be defined. Considering the UE capability of the RF antenna switching mode, the evaluation period may be relaxed according to different values of N, n= {1,2,3,4,6,8}.

Fig. 23 shows a conventional test method and problems.

Referring to fig. 23, problems with the conventional test method may include:

Conventional test method in connected state-UE reports measurement results to the test device (gNB emulator), possibly by MR.

LR mainly works in idle state. In idle state, LR works, MR sleeps, and the test equipment cannot obtain the measurement result of the UE.

The LR performance test method in idle mode is used for solving the problems of the traditional test method.

According to an embodiment of the invention, the UE adaptive scaling is based on the measurement results of the first receiver to obtain similar measurement performance to the second receiver, and comprises scaling the measurement results of the first receiver based on the first measurement bias of the first receiver, the first receiver structure related parameter and the first low power consumption correction parameter to obtain similar measurement performance to the second receiver.

for LR OFDM-based receiver architectures, the UE uses LR to make RRM relaxation measurements of the neighbor cells based on the number of SSS beams indicated for LR. The UE adaptively biases and scales LR-based measurements and combines this scaled result with MR measurements to perform neighbor ranking. The UE automatically identifies and reselects to the highest ranked cell based on the mixed neighbor ranking result.

When the MR offloads RRM measurements to the LR, the LR determines whether the MR needs cell selection, cell reselection, by measuring low power reference signals. For example, embodiments in accordance with the invention may include one or more of the following:

Configuring a new measurement timing configuration period, e.g. T _SMTCLR or And extend its length for LR;

Configuring the interval of the new at least two measurements for LR;

Determining a maximum evaluation period applicable to LR while taking into account various influencing factors of the terminal and the network device;

Determining whether cell selection or reselection is required based on the measurement of LR, two methods are provided, one of which is to adjust the measurement of LR, determine it according to the criteria of MR, and one of which is to provide criteria directly applied to the LR results;

methods of correlating LR measurements with MR measurements are provided, including two methods of acquisition of LR measurement bias WUSoffset.

Providing a new System Information Block (SIB) design, such as wusSIB, reduces configuration options and simplifies functionality. Meanwhile, for a UE supporting LP-WUS/LP-WUR, the SI scheduling information needs to be preconfigured in the UE, broadcasted through the MIB or SIB1 period.

Embodiments according to the present invention may be applied to cell selection/reselection in a mobile scenario when LP-WUS/LP-WUR is considered, but the embodiments of the present invention are not limited thereto.

According to the embodiment of the invention, in order to ensure the dependence and the availability of the LR measurement results, the MR can be awakened accurately enough, and false alarms and missing reports are reduced. The following directions and methods can be focused on:

1. According to an embodiment of the present invention, in order to match the existing SMTC period with the low power consumption signal LP-SS period T _lP-SS, the existing SMTC period length is extended, so that the measurement time is configured to be periodic

T _SMTCLR, also referred to as a measurement time window, may encompass the existing maximum SMTC period 160

Ms, for example, a measurement time configuration period T _SMTCLR applicable to LR may be defined as including 5

At least one of ms, 10ms, 120ms, 40ms, 80ms, 160ms, 320ms, or more, the greater T _SMTCLR may be 10240ms, for example.

2. According to an embodiment of the present invention, in order to include a sufficient number of samples when considering measurement filtering, the existing interval DRX cycle/2 of at least two measurements is adapted to LR, a new measurement interval may also be defined, in particular, the measurement interval may be defined as d=

Operator (DRX cycle, T _SMTCLR,T_LP-SS)/A. Wherein A is a positive integer,

The operator (·) is an operator, and may be one of a maximum value max (·), a minimum value min (·). Wherein SMTC measurement windows and measurement intervals are shown in fig. 19. According to an embodiment of the present disclosure, the measurement interval is related to at least one parameter of a measurement timing period of the first reference signal, and/or a measurement period of the first reference signal, and/or a discontinuous reception, DRX, period based on configuration information related to cell measurements.

3. According to embodiments of the present invention, there may be two methods to define an evaluation period associated with LR. In method 1, the evaluation period is defined jointly by the LR-related relaxation factor M1, the RF antenna switching factor N, and the new evaluation granularity graininess. In method 2, the evaluation period is determined by LR-related relaxation factor M1, RF antenna switching factor N, but the evaluation granularity remains as the existing DRX period.

For method 1, a minimum evaluation granularity LR period length applicable to LR-based is defined to replace the existing measurement granularity DRX period. The granularity may be affected by one or more of DRX cycle, T _SMTCLR、T_LP-SS, may be, for example, graininess = a (DRX cycle, LR-based first SMTC cycle, T _LP-SS), where a is an operator, may be one of maximum max (, minimum min (), or average (), or rounded up ceil (), and LR-based first SMTC cycle may be expressed as T _SMTCLR or

Meanwhile, since the RSRP/RSRQ quality measured using low power consumption signals such as LP-SS is relatively low, the relaxation evaluation period (longer measurement period) requirement can be defined to ensure quality, the relaxation factor β= [0.32/granularity ], [ · ] can be defined as a rounding operation, and β can also be referred to as the scaling of the DRX period

Meanwhile, the evaluation period is also extended in consideration of the RF antenna switching pattern. The evaluation period is extended by a parameter N, which may be selected to be 1,2,3, 4, 6, or 8 depending on the antenna switching mode.

Meanwhile, in the idle mode, another relaxation factor M1 needs to be introduced in defining the evaluation period in consideration of the paging collision situation of the LP-SS with that indicated by the LP-WUS. For example, for small DRX cycles up to 640ms, where m1=2 when T _SMTCLR/T_LP-SS is greater than 40ms, where the LR-based first SMTC cycle may be denoted as T _SMTCLR or as

The number of DRX cycles N _servLR or suitable for LRCorresponding cell selection period T _servLR orCan be defined as shown in the following table 3 (for FR1 only):

TABLE 3 Table 3

For method 2, N _servLR、T_servLR applicable to LR can be defined as shown in Table 4 below (for FR1 only):

TABLE 4 Table 4

Whether method 1 or method 2 is utilized, the MR serving cell measurement relaxation can be implemented with LR.

The embodiments of the present invention propose various methods to achieve that the S criterion for cell selection and the R criterion for cell reselection still apply in case the RRM measurement is offloaded to LP.

The embodiment of the invention can be applied to a scenario 1, wherein a serving cell uses RRM for unloading, a neighboring cell does not use RRM for unloading, and the coverage of the serving cell and the neighboring cell are overlapped, as shown in fig. 6.

In case the UE moves from outside the area to point a in the area of the serving cell, the UE uses existing rules for cell selection, follows the NR procedure, uses a specified maximum evaluation period N _serv/T_serv and cell selection S criteria requirements.

In case the UE moves from point a to point B and at point B, the UE enters the LR coverage area from the normal coverage area of the area, if the network supports LP-WUS/LP-WUR/WUR deployment and the UE has this feature, the MR sleeps, in which case the NW sends a low power signal, e.g. LP-SS, and the UE performs measurement and evaluation of the serving cell based on the LP-SS. Also in this case, the LP-SS based cell selection criteria and parameters should be such that the UE still successfully camps on the serving cell. The most critical issue is that performance comparable to that obtained with SSB (MR RS) can be obtained with LP-SS (LR RS).

Solution 1-1 based on the configuration threshold of the MR (e.g., the configuration may be 0 with it), an applicability criterion/relaxation measurement criterion is defined relating to LR scaling measurements, LR coverage specific minimum required reception level, referred to in this patent as first applicability criterion, defined as follows:

the S criterion in the reuse NR procedure accompanies the existing threshold value 0, i.e

Srxlev >0 and square >0

Wherein, the

Srxlev=f(Q_rxlevmeasLR)-(Q_rxlevminLR+Q_{rxlevminoffset})-P_compensation-Qoffset_temp (5)

Squal=f(Q_qualmeasLR)-(Q_qualminLR+Q_{qualminoffset})-Qoffset_temp (6)

Where f (·) is a scaling model, e.g. scaling model (1), the threshold may be 0, S _lntraSearchP or S _lntraSearchQ for co-channel measurements, and S _{nonIntraSearchP} or S _{nonIntraSearchQ} for co/low priority inter-channel measurements.

But the following factors need to be considered:

1) The UE stores SIB information received in a normal coverage mode or transmits the SIB information to the LR through MR to obtain configuration information such as Q _{rxlevminoffset}、Q_{qualminoffset}、P_compensation、Qoffset_temp;

2) Because of the different coverage of LR and MR, it is necessary to define LR coverage specific minimum required reception levels Q _rxlevminLR and Q _qualminLR, which are suitable for applicability checking in LP-WUR coverage;

3) LR-based measurements need to scale to ensure that threshold 0 is unchanged, srxlev _LR (i.e., srxlev corresponding to LP-WUS/LP-WUR/WUR) and square _LR (i.e., square corresponding to LP-WUS/LP-WUR/WUR) need to be very similar to Srxlev and square. Whereas Srxlev _LR and square _LR are mainly based on RSRP _{LP_SS} (i.e. RSRP value calculated based on LP-SS) and RSRQ _{LP_SS} (i.e. R SRQ value calculated based on LP-SS). Considering that the RSRP/RSRQ values calculated with low power consumption signals such as LP-SS and normal signals such as SSB are different, it is necessary to approach Q _rxlevmeas (SS-RSRP) and Q _qualmeas (SS-RSRQ) infinitely according to the LP-RSRP/LP-RSRQ measured based on the LP-SS, i.e. Q _rxlevmeasLR and Q _qualmeasLR, respectively, to meet the signal strength/quality criterion calculated by MR based on SSB.

In order to determine the relationship between Q _rxlevmeasLR (LP-RSRP) or Q _qualmeasLR (LP-RSRQ) and Q _rxlevmeas (SS-RSRP) or Q _qualmeas (SS-RSRQ), it is first necessary to determine an LR measurement bias, which may be denoted as WUSoffset. According to embodiments of the present disclosure, two methods may be used for determining WUSoffset. One calibration-based approach WUSoffset may be related to one or more of a first parameter (Offset _imbalance) configured by the NW and/or a second parameter (Offset _cal) calculated by the UE, and/or a third parameter (Offset ANTENNASWITCHING) related to the UE RF implementation, e.g., may be calculated according to equation (7) below:

WUSoffset =Offset_imbalance+Offset_cal+Offset_{antennaswitching}+small_margin (7)

Wherein small _margin is a measurement margin including other losses and RF implementation margin, offset _{antennaswitching} may be {1,2,3,4,6,8} depending on the difference in LR-MR antenna architecture design, depending on whether the UE supports antenna switching.

There are two alternative LR-MR antenna structural designs according to embodiments of the present disclosure:

Structural design 1 antenna separation mechanism. The drawbacks of this design are 1) the poor performance caused by the separate antenna design, 2) the need for more space to place more antennas for the handset, high cost, and 3) the impractical separate receiver and antenna for FR 2. Meanwhile, due to the separate antenna design, the correlation between MR and LR is poor, which may cause LR to wake up MR too often (false alarm) or to miss. The defect explanation is shown in fig. 24. In particular, the LR problem with single antenna architectures is that their coverage performance is poor compared to MR with multiple antennas. Even with special design, LR has better coverage on average in the case of a single antenna. Yet another problem is that when the MR offloads RRM to the LR, it is required that the measurement result (e.g., LP-RSRP) of the LR to the reference signal (e.g., LP-SS) is comparable to the measurement result (e.g., SS-RSRP) of the MR to the reference signal (e.g., SSB), i.e., the measurement difference between the two is relatively stable. However, since the wireless signals are continuously transformed over time, the signal receiving power received by different antennas often varies greatly, the MR generally has at least two antennas, and many antennas can support 4 antennas or even 8 antennas, and the MR receiving signal is obtained by maximizing or combining the measurement results of the multiple antennas, so that the difference between the measurement results of the single antenna LR and the measurement results of the multiple antennas of the MR is great, and when the RRM of the MR is unloaded to the LR, more margin needs to be reserved when the offset between the LR and the MR is set, which brings about higher possibility of false wake-up.

Structural design 2 antenna sharing mechanism based on different frequency bands (FR 1/FR 2).

For FR1, between LR and MR, the UE uses antenna sharing and switching. The method has the advantages of stronger correlation of RRM measurement results of LR and MR, thereby being capable of unloading RRM from MR to LR, and being low in cost and easy to implement.

Embodiments of the present disclosure provide a multi-antenna LR design based on switching, with the MR antenna shared with the LR, accessing the LR receiver through a controllable switching device, as shown in fig. 11. When the MR is received by the double antenna, the two MR antennas are also connected to the LR through the switching device for receiving.

The switching device of fig. 11 may not necessarily be a separate switching device according to embodiments of the present disclosure, and any design capable of achieving the switching effect of the present invention is included in embodiments of the present invention.

According to the embodiment of the disclosure, when the MR works in certain frequency bands, 4 antennas or more may be supported, and accordingly, the 4 antennas may all be connected to the LR through the switching device for receiving, and part of antennas (such as 2 of 4 antennas) with better performance may also be selected from the 4 antennas for receiving through the switching access LR.

According to an embodiment of the present disclosure, LR may receive low power consumption signals using different antennas by means of polling, as shown in fig. 12.

According to embodiments of the present disclosure, the antenna poll reception period of the LR may be the same as the period of the low power reference signal, such as LP-SS, as shown in fig. 15, i.e., one antenna is used per LP-SS period. According to embodiments of the present disclosure, the antenna poll reception period of the LR may also be an integer multiple of the LP-SS signal period.

According to embodiments of the present disclosure, LR may also select the best antenna fix for longer signal reception and measurement by polling after several measurements. After one or more cycles, the "poll antenna+fixed antenna" operation is repeated and cycled, as shown in fig. 13.

When the user equipment performs RRM offloading, it is necessary to consider that the default value of the number N of switching antennas N, N of the user equipment is 1, that is, antenna switching is not supported. If N >1, then its LR supports antenna switching, typically 2 or 4, but also 3, 6, 8, etc.

According to embodiments of the present disclosure, for FR2, the UE uses LR designed as a subset of MRs. The antenna sharing structure is shown in fig. 25. The total component of the beamforming of all antenna elements is considered MR when activated and LR when part of the antenna elements are activated. The benefit of this design is that the RRM measurements of LR and MR are highly correlated, enabling offloading of RRM from MR to LR, and furthermore, low cost and easy implementation.

Referring back to equation (7), offset _imbalance is the actual difference in LR RS (LP-SS) and MR RS (SSB) power (this difference is due to the possibility that LP-SS may perform power boost), and the power boost configuration may be obtained from NW and broadcasted by RRC RELEASE or SIB (x).

Offset _cal is the calculated error of the UE itself based on the reference signal. According to embodiments of the present disclosure, it may be relevant to at least one of the following factors:

Offset _REFSENS sensitivity difference between MR and LR (or noise figure difference between MR and LR);

offset _RSRP/RSRQ measurement result difference using LR RS and MR RS. I.e. the difference between the two RSRP/RSRQ when LR and MR receive the same signal power.

According to embodiments of the present disclosure, the UE may adaptively scale LR-based measurements based on LR receiver structural parameters and WUSoffset described above.

According to embodiments of the present disclosure, a mapping relationship from Q _rxlevmeasLR(LP-RSRP)/Q_qualmeasLR (LP-RSRQ) to Q _rxlevmeas(SS-RSRP)/Q_qualmeas (SS-RSRQ) is adaptively established based on a UE receiver structure.

The relationship of Q _qualmeasLR and Q _rxlevmeas may be:

The relationship of Q _qualmeasLR and Q _qualmeas may be:

In the formulas (8) and (9), θ, μ are correction coefficients, and are generally 1 or close to 1. Beta ₁、β₂ and beta ₃ are related to UE receiver structure. f1 (. Cndot.) and f2 (. Cndot.) are equivalent to Q _rxlevmeasLR and Q _qualmeasLR, respectively.

Beta ₁ relates to the LP-SS "1" symbol modulation scale, beta ₂ relates to the LP-SS "1" symbol coding scale, and beta ₃ relates to the number of occupied REs. If and only if OOK-1 modulation scheme is considered and there is no coding, β ₁＝β₂ =1.

T denotes the duration of linear averaging of LP-SS received power.

Another method, according to an embodiment of the present disclosure, is to dynamically determine WUSoffset between LR and MR based on measurements. Before switching from the MR working state to the LR working state, MR and LR respectively measure the respective reference signals, and a difference value of the MR and the LR is obtained after a period of time and is taken as WUSoffset.

Solution 1-2-it is required that NW indicates via system information the cell supporting LP-WUR or the cell configuring and supporting the cell transmitting LP-SS selects new thresholds a _LR and B _LR and designs a new applicability S criterion/relaxation measurement criterion, S _LR, called second applicability criterion in this patent, for LR to improve uplink or downlink coverage. A _LR and B _LR may be 0-Z1dB and 0-Z2dB, respectively, where Z1 and Z2 are positive integers.

According to an embodiment of the present disclosure, a new applicability S _LR criterion based on a new threshold a _LR/B_LR is defined, namely:

Srxlev _LR>A_LR and square _LR>B_LR

Srxlev _LR、Squal_LR is the signal received power and quality based on low power consumption signals such as LP-SS.

And at this point Srxlev _LR、Srxlev_LR may be defined as follows:

Srxlev_LR＝Q_rxlevmeasLR–(Q_relevminLR+Q_{rxlevminoffset})–P_compensation-Qofset_temp (10)

Squal_LR＝Q_qualmeasLR–(Q_qualminLP+Q_{qualminoffset})–Qofset_temp (11)

the parameters of formulas (10) and (11) are explained as follows in Table 5:

TABLE 5

In this solution 1-2, all parameters are cell specific, and the same and fixed Z1 and Z2 cannot cover all possibilities when the UE capabilities and the mapping between MR and LR are different.

It is noted that similar to solution 1-1, the thresholds may be a _LR and B _LR, S _{IntraSearchPLR} or S _{IntraSearchQLR} for co-channel measurements, and S _{nonIntraSearchPLR} or S _{nonIntraSearchqLR} for co/low priority inter-channel measurements.

Meanwhile, the solution needs to consider the following factors:

1) A new system information SIB (e.g., may be represented as SIB (x), which is a positive integer, but the invention is not limited thereto) design is required.

The cell should signal the UE with a new configuration value in a new SIB for LR (e.g., SIB (x)).

2) If the stored information cannot be used for cell selection at this time, the UE needs to perform initial cell selection.

Based on the two methods described above, the UE applies LR to measure RSRP _{LP_Ss} and RSRQ _{LP_SS} of the serving cell and evaluates the new applicability criteria S criteria defined for the serving cell at least once for each M ₁×N₁ x N x β x LR period or M ₁ x N1 x N x DRX period. It is then verified whether LR-related applicability criteria/relaxation measurement criteria are met.

According to an embodiment of the present disclosure, the new serving cell measurement and evaluation procedure is summarized as follows:

step 1, starting up UE

Step 2 UE cell search/detection

It is noted that not every cell supports LP-WUR configuration (i.e., is equipped with LP-SS), and MR and LR need to be synchronized down to the same cell, two synchronization methods may be used according to embodiments of the present disclosure.

Method 1 mr and LR both require synchronization.

The network periodically transmits SSB signals, and the UE detects SSB and decodes PSS, SSS, and PBCH using MR, acquires cell time and frequency synchronization, and acquires cell ID.

If the cell supports/deploys the LP-WUR and the UE supports the LP-WUR feature, the network periodically sends the LP-SS and the UE uses LR to detect the LP-SS for synchronization.

Method 2 MR forces synchronization to be required, LR synchronizes on demand.

The conditions that activate LR synchronization may be link data rate and power strength. For example, if the link data rate is small, the MR with high power consumption is not needed, the UE can sleep the MR, and the LR can be used for RRM measurement tasks, and the like, so that the LR can be synchronized. For example, when the assistance condition/SNR level/BLER is above a threshold or when the UE experiences a sufficiently high RSRP value at the serving cell, the MR may be put to sleep, RRM measurement tasks with LR, etc.

And 3, decoding the MIB information by the UE.

And 4, decoding SIB1 and decoding other SIBs by the UE.

SIB1 may be a new system information 1 (SIB 1) (e.g., newSIB 1), containing T _SMTCLR orWUS information, etc. SIB (x) may also be part of the new SIB1 and the new SIB1 may also contain configuration information for cell selection/reselection

SIB (x) may also be an independent new SIB, after SIB1 the UE flexibly parses the parameters according to whether LP-WUS/LP-WUR is supported.

If the network supports LP-WUR, the network may configure the corresponding values for the corresponding parameters. If the network does not support LP-WUR, the LP-WUR related parameter may be configured with a default value of 'absent' or '0'.

And 5, the UE performs cell search.

After the UE has been switched on and the PLMN has been selected, the UE performs a cell selection procedure. There are two cell selection modes, 1) if cell information is stored for a PLMN, cell selection with stored information can be performed, and 2) if cell information is not stored for a PLMN, initial cell selection is performed. This step and subsequent steps embody the initial cell selection.

A UE supporting new characteristics (also referred to as a UE supporting LP-WUS/LP-WUR) may perform cell selection with solution 1 or 2, and may be specifically implemented according to the UE.

Step 5-1 serving cell measurements for UEs supporting the new characteristics. The UE supporting the new feature measures RSRP and RSRQ levels of the serving cell using the LR received LP-SS signal. The UE needs to use at least two measurements to perform measurement filtering on RSRP _{LP_SS} and RSRQ _{LP_SS} of the serving cell, where the at least two measurements are spaced apart by at least D in a set of measurements for filtering. And, the UE needs to evaluate whether the RSRP and RSRQ of the serving cell satisfy the cell selection S criterion in the evaluation period T _servLR.

Step 5-1-1 if the UE does not detect the new system information SIB (x), the UE supporting the new characteristics converts Q _relevmeasLR/Q_qualmeasLR according to the rules of formulas (8) and (9) above.

Step 5-1-2 if new system information wusSIB is detected, the UE supporting the new feature directly gets Q _relevmeasLR or Q through RSRP _{LP_SS}/RSRQ_{LP_SS} _qualmeasLR

Step 5-2, serving cell selection of the UE supporting the new feature.

Step 5-2-1 if the UE does not detect the new system information SIB (x) and the converted Q _rxlevmeasLR and Q _qualmeasLR are obtained by formulas (8) and (9), cell selection decision can be made by the existing S criteria through the respective parameter values decoded from SIB information.

That is, if Srxlev >0 and square >0, the cell is referred to as a suitable cell, and the UE may camp on the cell. If no suitable cell is found, any cell is selected for camping.

Step 5-2-2 if the UE detects the new system information SIB (x) and the new system information newSIB a, and Q _rxlevmeasLR or Q _qualmeasLR is obtained. The UE performs cell selection judgment by S _WUS criteria by the parameter values decoded from wusSIB and newSIB1 information.

That is, if Srxlev _LR>A_LR and square _LR>B_LR, the cell is referred to as a suitable cell in which a UE may camp. If no suitable cell is found, any cell is selected for camping.

And 5-3, finding a more suitable cell and carrying out cell reselection.

In the case where the UE moves from point B to point C and is at point C, the UE moves to the LR coverage area of the own serving cell but overlaps with the normal area of the neighbor cell. In this case, the MR wake-up event is triggered, and a process diagram of MR wake-up in different scenarios is shown in fig. 20. Wherein the MR can be awakened according to a new applicability criterion, which is based on the measurement result of the LR. In particular, the new applicability criterion is determined based on LR scaling measurements, LR coverage specific minimum required reception levels and thresholds configured for MR. If the LR determines that the same-frequency measurement is needed, the UE waits to monitor the LP-WUS signal and wake up the MR, i.e., network triggers the MR to wake up. Whether the UE receives the LP-WUS signal within a time period (duration), for example, the time period may be Z seconds.

Scene 1-thoroughly power saving scene. To save as much MR power as possible, a UE that is stationary or not at the cell edge or moving at low speed may prioritize LR coverage for normal coverage. MR can remain asleep all the time. At this point the UE may camp on the LR-supporting cell until the LR-related timer based on the network configuration expires.

Scenario 2 Normal MR wakes up. According to embodiments of the present disclosure, in this scenario, the following steps may be performed:

in step 20-1, when the LR entry condition is satisfied, the UE enters LR mode and maintains LR operation.

The UE may maintain the LR operating state after entering the LR. According to embodiments of the present disclosure, the entry condition may be satisfied by the condition |SS-RSRP| > a preset threshold within the measurement time window. The preset threshold may be a network configuration, broadcast via a system message.

In step 20-2, including MR threshold-based schemes and LR threshold-based schemes, the UE performs serving cell measurements using LR and evaluates new applicability criteria/relaxation measurement criteria for the serving cell at least once every M ₁×N₁ x N x β x LR cycles or M ₁ x N1 x N x DRX cycles. And verifies whether the LR-related applicability criteria/relaxation measurement criteria are met.

In step 20-3, if data is transmitted, the UE detects the LP-WUS signal and wakes up the MR to listen for pages in Z ms to ensure accurate and dependable time/frequency alignment between LP-SS and LP-WUS.

In step 20-4, the MR wakes up successfully, resumes the cell search or performs the subsequent cell reselection evaluation procedure.

Scenario 3MR wake-up based on LR exit conditions. According to embodiments of the present disclosure, the LR exit condition may include | (LP-RSRP) | < a pre-configured threshold during T _SMTCLR or T _LP-SS.

For scenario 2, an MR wake-up decision is made based on LR measurements within the evaluation window.

The current cell suitability may be evaluated according to a first suitability criterion based on LR scaling measurements to wake up the MR for re-cell reselection or cell reselection evaluation. It is noted that the threshold configured for MR may be 0, or S _IntraSearchP/S_IntraSearchQ for co-frequency measurement, or S _{nonIntraSearchP}/S_{nonIntraSearchQ} for co/low priority inter-frequency measurement.

The suitability of the current cell may be evaluated according to a second suitability criterion based on the measurement result of the LR.

LR performance tests are also required to verify the performance of LR as a receiver in idle and inactive states. According to embodiments of the present disclosure, two LR performance testing methods are provided. The first method is a performance test process based on a normal signaling process. The second method is to define the performance test flow of the specific test mode. The two methods are shown in fig. 21 (a) and (b).

Referring to fig. 21 (a), in a method one, in step 2101, in an idle state, the MR enters a sleep state. In step 2102, the LR enters an access state, and the UE receives a network simulator (TE) message through the LR. In step 2103, the TE transmits the LP-WUS signal to the UE and records the number of transmissions N _total as 1, and the UE receives the LP-WUS signal through the LR and decodes. If the decoding is unsuccessful, the MR is not awakened, the process returns to step 2103, TE continues to send the LP-WUS signal, the value of N _total is increased by 1, if the decoding is successful, the process proceeds to step 2105, LR wakes up the MR, MR and TE enter a connection state through an access process, so that TE knows that the waking is successful, the value of the number of successful waking times N _success is increased by 1, and then the process returns to step 2101. The cycle is repeated until the total number of accumulated transmissions reaches a preset value, such as 10000 times.

Referring to fig. 21 (b), in a second method, in step 2111, in a connected state, the UE receives a message from the TE to enter or activate a test mode through the MR, the message to enter or activate the test mode containing contents indicating a specific behavior of the LR after receiving the low power wake-up signal, and/or an exit condition that the LR no longer maintains the specific behavior. According to embodiments of the present disclosure, a specific behavior may be that the LR of the UE accumulates the number of successful wakeups after receiving the low power wake-up signal, but does not wake up the MR. In step 2112, after the UE reports the response message (ACK), the UE enters an idle state, at which time the MR enters a sleep state and the LR enters an access state. In step 2113, the ue receives the TE message through the LR. TE sends LP-WUS signal to UE and records the sending times N _total as 1, and UE receives LP-WUS signal through LR monitoring and decodes. If the decoding is unsuccessful, the MR is not awakened at step 2114, return to step 2113, TE continues to send the LP-WUS signal, N _total is incremented by 1, if the decoding is successful, proceed to step 2114, LR still does not awaken the MR, but the value of the number of times N _success of successful awakenings is incremented by 1, and return to step 2113. The cycle is repeated until an exit condition is reached, such as the cumulative total number of transmissions reaches a preset value, such as 10000 times.

In the above method, if the TE sends N _total true LP-WUS and then detects N _success wakeups, the calculation of the miss rate MDR is mdr= (N _total-N_success)/N_total. If the TE sends N _total false LP-WUS messages or noise messages, the calculation of the false wake-up rate FAR is far=n _success/N_total. The false low power wake-up signal is a low power wake-up signal or noise to wake up other UEs.

According to the embodiment of the invention, the interval between the low-power consumption wake-up signals sent to the UE is a preset time interval.

According to the embodiment of the invention, after the last low-power consumption wake-up signal is sent to the UE, the TE sends a message for exiting or deactivating the test mode to the UE and receives a response message ACK reported by the UE.

In test mode two, even if the LR detects LP-WUS and decodes paging information, the LR will not wake up the MR until the termination condition is met. The test parameters configured for LR should take into account REFSENS differences between MR and LR (i.e., differences in noise figures between MR and LR). A benefit of the test method according to embodiments of the present disclosure is that LR performance (e.g., MDR, FAR) can be tested in idle mode, solving the problem of failure to perform performance index testing in idle state. In particular, the second method can accelerate the test and save the test time.

In accordance with embodiments of the present disclosure, cell reselection event triggering also needs to be considered at this time, and multiple situations may occur depending on the frequency reselection priority.

Notably, cell reselection is based on cell rank (cell rank) results, which may be cell level or beam level. Depending on whether or not the cell is configured with rangeToBestCell parameters. If the cell is not configured rangeToBestCell with parameters, the best cell to which the UE reselects is the highest ranked cell. If the cell is configured with rangeToBestCell parameters, the best cell to which the UE reselects is the cell with the beam at most above the good beam threshold

Possible case 1

In order to save power, the reselection priority for the frequencies of the cells supporting the LP-WUR is highest.

In accordance with embodiments of the present disclosure, to save power gain considerations, reselection rules and parameters should ensure that the UE prioritizes LR coverage over neighbor cell normal range coverage so that the UE always resides on the highest priority frequency of LR coverage. The priority may be set directly in SIB1 or a new SIB (including the setting of the same frequency and different frequencies). A priority timer may be set, with the reselection priority for the frequencies of the LP-WUR supporting serving cells being highest within the timer expiration range/when the timer has not expired.

In this case, according to the embodiment of the present disclosure, when the UE is at point C, the UE does not wake up the host, which is the MR wake-up event scenario 1, and does not use PSS/SSS for neighbor detection.

In this case, according to the embodiment of the present disclosure, since the UE is at the edge of the neighbor cell, there may occur a low neighbor cell signal reception power and/or signal reception quality, and the SNR assistance condition level is low, and the neighbor cell RRM measurement offloading condition is not satisfied.

Possible case 2

According to embodiments of the present disclosure, serving cells perform RRM offloading, i.e., serving cell RRM measurements are performed with LR, while neighbor cells still use MR. At this time, the two cases of the same-frequency cell and the different-frequency cell are analyzed in combination with the MR wake-up event scenario 2.

In the case of on-channel cells, measurements for on-channel cells and reselection for on-channel cells need to be considered in accordance with embodiments of the present disclosure.

1) Measurement for co-frequency cells

Any suitable method may be used for the solution of measurement of the on-channel cells according to embodiments of the present disclosure.

2) Reselection to co-channel cells

If the UE wakes up the MR and starts neighbor cell measurement, and the reselection of the same-frequency cell is based on cell sequencing, RSRP values of the serving cell and the neighbor cell can be calculated and sequenced so as to perform reselection judgment.

Case 1. Since the MR has been awake at this time, cell reselection measurements may all be made on the MR basis. The R criteria (i.e., the serving cell's ranking criteria Rs and the neighbor ranking criteria Rn) may use the criteria as specified by equations (12) and (13) NR,

R_s＝Q_meas,s+Q_Hyst-Qoffset_temp (12)

R_n＝Q_meas,n+Qoffset-Qoffset_temp (13)

Wherein Q _meas,n is the received signal level value of the neighbor cell measured by the MR based on the SSB, i.e., the RSRP value of the neighbor cell.

Case 2. In some cases, the UE may not wake up the MR but may also make neighbor measurements. Specifically, if the UE does not wake up the MR but also starts neighbor cell measurement, then if the neighbor cell supports LP-WUR, the neighbor cell may also use LR to perform neighbor cell measurement. Q _meas,n in the R criterion is also the received signal level value of the neighbor measured based on the LP-SS, i.e., the Q _meas,n,LR value of the neighbor.

Case 3. If the neighbor does not support LP-WUR, the following may occur:

Case 3-1 if LR is not a UE supporting OFDM reception capability, if the above-described region overlapping situation occurs, the UE does not support neighbor cell measurement, at which time the cell priority covered by LR is highest.

Case 3-2 ue uses LR for neighbor cell measurement and serving cell measurement based on synchronization signal block SSB. The UE may be a UE whose LR supports OFDM reception capability. At this time, LR is turned on, and the UE performs serving cell relaxation measurement and neighbor cell measurement based on SSS.

According to the embodiments of the present disclosure, if the UE is at a cell edge location, that is, the edges of the serving cell LR coverage, the normal coverage, and the neighbor cell coverage. Since the OFDM waveform can reach the target coverage with lower resource consumption, for LR of the OFDM-based receiver structure, since LR can receive SSS of neighbor cells, if LR is not exited, the UE can utilize LR to perform serving cell relaxation measurement (using long RRM long measurement period) and proportional neighbor cell RRM measurement to implement neighbor cell relaxation measurement. A schematic diagram of a scenario of neighbor relaxation measurement is shown in fig. 22.

If MR and LR are on at the same time, then the measurement between MR and LR needs to be combined. But there are three problems, 1) how the UE combines the measurements based on the two measurement reference signals due to the different values and levels of LP-RSRP and SS-RSRP (LR and MR have different measurement intervals or measurement periods), 2) if the cell configuration rangeToBestCell, the beam threshold is configured for MR and LR cannot be used, 3) the UE cannot fairly compare the different measurements for ordering. Due to these problems, the performance of cell reselection will be reduced.

According to embodiments of the present disclosure, the solution may include at least the following two.

Scheme 1. Although LR can receive SSS, it does not perform measurements. The MR performs serving cell and neighbor measurements according to existing procedures and requirements. The requirements may include conventional on-channel cell measurement requirements and/or on-channel cell measurement requirements configured with relaxed measurement criteria. Wherein the criteria may be a low speed criteria and/or a non-cell edge criteria. LR automatically exits after X1 ms or meets an exit condition, X1 is a fixed or configured integer.

Scheme 2 LR serving cell relaxation measurements, LR partial neighbor measurements. In order to ensure that LR measurements can meet the cell ordering related settings configured for MR and that both types of measurements can be compared fairly for cell ordering, scaling of LR measurements is required. The mapping relationship shown in equation (14), which may also be referred to as a power domain measurement scaling model, may be considered:

Where ε is a correction factor, typically a value of 1, or close to 1.WUSoffset3 is identical to the previous solution 1-1, i.e. one of a calibration-based method and a measurement-based method can be used. f3 (-) indicates that Q _meas,s,LR.β₁、β₂ and beta ₃ are related to the UE receiver structure, beta ₁ is related to the LP-SS "1" symbol modulation ratio, beta ₂ is related to the LP-SS "1" symbol coding ratio, and beta ₃ is related to the number of occupied REs. If and only if OOK-1 modulation scheme is considered and there is no coding, β ₁＝β₂ =1. T denotes the duration of linear averaging of LP-SS received power. Q _meas,s,LR is based on equation (14) and represents the LR-based RSRP measurement in cell reselection. At this time, the expression (12) becomes the expression (15) shown below

Cell ordering is performed in combination with LR scaling measurements and MR measurements. At this time, the network may broadcast information configured for MR in the neighbor information, which may include N and beam absolute threshold. The threshold may determine what beam is a good beam. N is denoted here as N beams at least above an absolute threshold for cell reselection may be considered candidate beams. The UE automatically identifies and reselects the highest ranked cell based on the mixed neighbor cell ranking result. In accordance with an embodiment of the present disclosure, the cell ranking criterion R _n(Q_meas,n) of the neighbor cells is based on Q _meas,n, but derived from the combination of LR and MR, namely:

Ranking~Compare(Q_meas,n,LR(K_beam),Q_meas,n) (16)

wherein "-" means an associative character, means that the ranking is performed by comparing Q _meas,n,LR(K_beam) with Q _meas,n, and K _beam means that the number of SSB beams measured by LR indicated by the serving cell is at least 1. For each K _beam calculated by LR, the scaled mapping from LR to legacy RRM measurements is shown in equation (17):

Q_meas,n(K_beam)～γ*Q_meas,n,LR(K_beam)+WUSoffset4 (17)

Wherein WUSoffset4 may be related to one or more of a first parameter configured by NW (Offset _imbalance), and/or a second parameter calculated by UE (Offset _cal), and/or a third parameter related to UE RF implementation (Offset ANTENNASWITCHING), and/or a fourth parameter related to UE RF AGC adjustment (Offset _AGC), and margin small _margin, WUSoffset may be calculated as shown in equation (18):

WUSoffset4=Offset_AGC+Offset_{antennaswitching}+Offset_cal+Offset_imbalance

+small_margin(18)

The Offset _AGC is AGC adjustment inaccuracy, which is a constant, and γ is a correction coefficient, which may be a random value of 1 or less than 1.

At this time, the formula (16) becomes a comparison at the same level as shown in the formula (19):

Ranking~Compare(Q_meas,n(K_beam),Q_meas,n) (19)

Meanwhile, since R _n is commonly contributed by LR and MR at this time, R _n is expressed as formula (20):

R_n＝Combine(Q_meas,n(K_beam),Q_meas,n)+Qoffset-Qoffset_temp (20)

fig. 7 is a flow chart of on-channel cell reselection in accordance with an embodiment of the present disclosure.

In step 701, the ue successfully initiates neighbor measurement. The cell reselection evaluation procedure is successfully triggered.

In step 702, a neighbor cell is selected that satisfies the S criterion. The S criterion in the NR procedure can be reused.

In step 703, for the neighbor cells satisfying the S criterion, the serving cell and the neighbor cells are respectively ranked (Rs and Rn) according to the measured RSRP result in consideration of the R criterion.

Wherein Q _meas,n and Q _meas,s in Rn may be LR based LP-SS or SSB measurements, may be MR based SSB measurements, alternatively Q _meas,s is LR based SSB measurements, and Q _meas,n is a common measurement of MR and LR based SSB;

In step 704, the ue selects a neighbor cell with the highest signal reception quality level Rn as the best cell (i.e., highest quality level ranking cell, best cell) and defines it as the target cell.

In step 705, it is determined whether the selected best cell can satisfy the following two conditions:

Condition 1, preferably, whether the cell satisfies the R criterion Rn > Rs for a specified duration.

Condition 2 whether the ue is camping on the current cell for more than 1 second.

If the R criterion condition and the camping condition are satisfied at the same time, the process goes to step 706, the ue reselects to the cell, otherwise, the process goes to step 707, the ue continues camping on the original cell.

In the case of inter-frequency cells, measurements for inter-frequency cells and reselection for inter-frequency cells need to be considered in accordance with embodiments of the present disclosure.

1) Measurement for inter-frequency cells

According to embodiments of the present disclosure, frequency priorities need to be compared.

According to an aspect of the embodiment, if the inter-frequency point has a higher priority than the current serving frequency point, the UE will reselect the neighbor cell measurements on them regardless of the serving cell quality, and the UE directly uses the neighbor cell SSB for neighbor cell measurements. The host wakes up.

According to another aspect of the embodiment, if the priority of the inter-frequency points is lower than or equal to the priority of the current service frequency point, the inter-frequency measurement criterion needs to be determined. There are two solutions for the inter-frequency measurement criteria, and compared with the same-frequency measurement, the inter-frequency measurement criteria are different in threshold value but similar in design thought. The brief description is here:

solution 2-1:

And step 2-1, LR judges whether the UE has an inter-frequency measurement opportunity.

According to embodiments of the present disclosure, inter-frequency cell measurement decision criteria may reuse measurement rules in the NR process, i.e.

Srxlev < = S _{nonIntraSearchP} and square < = S _{nonIntraSearchQ} (21)

To ensure that the same threshold can be used, srxlev _LR and square _LR calculated with low power reference signals such as LP-SS/SSs need to be very similar to Srxlev and square, depending on the different UE receiver architecture. The required processing is as described with reference to solution 1-1.

When the coverage cell satisfies Srxlev > S _{nonIntraSearchP} and square > S _{nonIntraSearchQ}, the UE does not need to perform inter-frequency measurement when the priority of the inter-frequency point is lower than or equal to the priority of the current service frequency point, otherwise the UE needs to perform inter-frequency measurement.

Step 2-2, if the LR judges that the measurement opportunity is needed, the UE waits to monitor the LP-WUS signal and wakes up the MR.

In case the UE receives a low power reference signal such as LP-WUS signal within a certain period of time (e.g., Z seconds), the MR is normally awakened, and the MR re-determines whether to measure the inter-frequency neighbor using the NR inter-frequency measurement rule. I.e.

The UE does not choose to perform equal or low priority inter-frequency measurements if the serving cell satisfies Srxlev > S _{nonIntraSearchP} and square > S _{nonIntraSearchQ}, otherwise performs the measurements.

In case the UE does not receive a low power reference signal, e.g. LP-WUS signal, for a certain period of time (e.g. Z seconds), the MR is not woken up. At this time, the UE may select whether to measure the inter-frequency neighbor cell according to the LR determination result by itself according to implementation.

According to embodiments of the present disclosure, Z may be defined as the period/allowable time interval of the minimum LP-WUS signal, such as a maximum time offset of 3 μs from LP-WUS to LP-SS.

Likewise, for MR wakeup in step 2-2, the UE may also autonomously wake up the MR without network triggering according to the aforementioned MR wakeup mechanism. At this time, if the LR determines that the MR has an inter-frequency measurement opportunity, it wakes up the MR autonomously, and then the MR further determines whether the inter-frequency measurement rule based on the NR is satisfied, i.e., no network trigger is required.

Solution 2-2

According to embodiments of the present disclosure, the criterion for inter-frequency cell measurement may be based on the determination of a new inter-frequency measurement rule, i.e

Srxlev _LR≤S_{nonIntraSearchPLR} and Squal _LR≤S_{nonIntraSearchQLR} (22)

The definition of Srxlev _LR and Squal _LR is described in section 1-2 with reference to solution. The network informs the UE of the new thresholds S _{nonIntraSearchPLR} and S _{nonIntraSearchQLR} with new system information, e.g., SIB (x) or signaling.

2) Cell reselection for inter-frequency

According to the embodiment of the disclosure, in the case that the inter-frequency cells have the same priority as the serving cells, the S criterion and the R criterion may be used, and the specific processing method and the flow refer to the reselection of the inter-frequency cells.

According to the embodiment of the disclosure, in the case that the inter-frequency cells have different priorities from the serving cell, the cell reselection may be performed on the high-priority inter-frequency cells or the low-priority inter-frequency cells.

Cell reselection will select a high priority inter-frequency cell if the following conditions are met at the same time:

-the UE is in the current serving cell for more than 1 second;

within the system information SIB4, srxlev of the evaluated neighbor is larger than the parameters indicated by the system information, such as threshX-HighP (ThreshX, highP) broadcasted in SIB 4.

Cell reselection will select a low priority inter-frequency cell if the following conditions are met at the same time:

-none of the high priority inter-frequency neighbors satisfies the high priority cell reselection condition;

-the UE is in the current serving cell for more than 1 second;

within the inter-frequency neighbor reselection time (which may be fixed 1s, for example) of the system information SIB4 broadcast, while satisfying the following conditions:

the Srxlev value of the serving cell is less than the parameters indicated by the system information, such as threshServingLowP of SIB2, where Srxlev is available according to solution 1-1 and solution 1-2 and is not repeated;

The Srxlev of the evaluated neighbor is larger than the parameters indicated by the system information, e.g. threshX-LowP of SIB 4.

According to embodiments of the present disclosure, srxlev of a neighbor cell may be obtained by SSB of the neighbor cell.

When the UE moves from the point C to the point D and is at the point D, the UE moves from a serving cell supporting the LP-WUR to a neighbor cell not supporting the LP-WUR, and the UE is at the juncture of the normal ranges of the two cells. In this case, the UE uses MR for neighbor cell measurement and reselection, i.e., the UE uses normal NR reselection procedure, and once the reselection rules (e.g., S criteria and R criteria) are met, the UE performs new cell reselection.

Meanwhile, when the UE moves from LR coverage to normal range of neighbor cell (neighbor cell), the UE may trigger reading of system information, and at this time, the information received from the system information may replace any originally stored information. Meanwhile, although the applicability criterion (e.g., S criterion or R criterion) of the neighbor/frequency is not updated, the UE needs to know at least whether the neighbor supports LP-WUR.

When the UE moves from point D to point E and is at point E, the UE moves inside the neighbor cell. The neighbor cell becomes a serving cell. In this case, the system information of the neighbor cell is already stored at D. At this time, the UE may perform cell selection using SSBs of neighboring cells.

The embodiment of the invention can be applied to a scenario 2, wherein the serving cell is unloaded by using RRM, the neighbor cell is unloaded by not using RRM, and the coverage of the serving cell and the neighbor cell are not overlapped, as shown in figure 8.

This scenario differs from scenario 1 in that the normal coverage of both the serving cell and the neighbor cell do not overlap. There is a problem in that the power saving gain is reduced due to the need to frequently switch LP-WUR and MR.

When the UE moves to point a, the UE moves from outside the area into the area of the serving cell, the UE uses existing rules for cell selection, follows the NR procedure, uses a specified maximum evaluation period Tserv and S criteria requirements.

When the UE moves from point a to point B and is at point B, the UE enters the LR coverage area from the normal coverage area of the cell, and if the network supports LP-WUS/LP-WUR and the UE has this feature, the MR sleeps. In this case, the UE performs measurement and evaluation of the serving cell using low power reference information, such as LP-SS, according to an embodiment of the present disclosure. Also in this case, the LP-SS based cell selection criteria and parameters should be such that the UE successfully camps on the serving cell.

The possible cases and corresponding processing methods are the same as scenario 1.

When the UE moves from point B to point C and is at point C, the UE moves from the LR coverage area of the cell to the normal coverage area of the area, the UE activates MR, and uses SSB for cell selection or reselection.

When the UE moves from point C to point D and is at point D, neighbor processing based on the NR procedure.

According to the RRM measurement and decision mechanism at the LR side of the embodiment of the disclosure, the reliability of RRM measurement by using LR can be improved, thereby reducing the false wake-up rate and improving the power saving effect and performance of equipment

Embodiments of the present disclosure include designing new system information that supports low power consumption performance, such as a system information block SIB (x), where x is a positive integer through which LR configuration parameters can be transmitted. The new system information, e.g., SIB (x), is only applicable to the cells supporting/deploying LP-WUR. Which may have the same or different content as the existing system information. The new system information, e.g., SIB (x), may be designed to be the same asn.1 structure and the same value, the same asn.1 structure but different values, different asn.1 structures and different values.

In view of reduced UE complexity and UE power consumption, according to embodiments of the present disclosure, new system information, e.g., SIB (x), design criteria include using less information size (SMALL MESSAGE size) and containing less information than traditional system information, i.e., reducing configuration options and simplifying functionality. Meanwhile, for a UE supporting LP-WUR, the system information (i.e., SIB (x)) scheduling information needs to be preconfigured within the UE, periodically broadcast through a master information block MIB or system information SIB1 or new system information newSIB.

The SIB (x) may be broadcast in small periods, and the LR configuration needs to take into account the compatibility of the UE reception capability. In particular, the LP-WUR SIB may be acquired through flexible short SI period broadcast, such as 80ms. Or the UE obtains it on demand. LR configuration in SIB (x) requires compatibility with both UE reception capabilities (OOK-based receiver and OFDM-based receiver).

LR parameters transmitted in the new SIB (x) may include one or more of the following:

introducing an indication in SI that the cell supports LP-WUR operation, which can be implemented with a 1-bit flag;

introducing measurement quantity to be reported, wherein the measurement quantity can be one or more of LP-RSRP/PSRQ/RSSI/SINR;

configuring a pre-processing cell quality threshold to determine whether to enter or exit the LP-WUR;

configuration enforcement LP-SS measurement parameters, such as time or frequency configuration;

configuring LP-WUS parameters such as paging indication information, WUS period, UE group, UE subgroup (UE-subgroup) or UE ID, SI change indication, system information indication;

Configuring default cell selection appropriate factors for each frequency point supporting LR operation cells and considering small UL and/or DL coverage;

configuring a priority for a cell supporting LR operation, which may be default if the cell priority is the same as the serving cell;

gNB power boost gain.

The new SIBs may include one or more of the contents shown in table 6.

TABLE 6

By means of the system information block according to the embodiment of the present disclosure, it may be achieved that, for example, a network may flexibly configure parameters required by the LP-WUR for UEs supporting the new characteristics of the LP-WUR/LP-WUS according to their own supported carrier deployment conditions, coverage areas, and different frequency layer priorities. Meanwhile, from the aspect of overhead of a system information SIB, the new SIB design contains less information bits, is simplified and has low power consumption, and the applicability to LP-WUR with simple functions is higher. Meanwhile, by using the small-size SIB, the time for acquiring the LP-WUR configuration from the NW can be reduced, unnecessary SIB broadcast overhead of the NW is avoided, and the power consumption of the UE is reduced.

Notably, LR-related measurement configurations can also be broadcast through existing SIBs, RRCRelease. If the UE is released from the connected state back to the idle or inactive state, such as through RRCRELEASE, the NW may transmit corresponding configuration information through RRCRELEASE.

Embodiments of the present disclosure include a handover-based multi-antenna LR design and RRM measurement method.

It should be noted that in this description, only antennas are used for convenience of description, but the present invention also encompasses switching designs of devices such as multiple rf front-end links (e.g., each path may include one or more of an antenna, a matching network, an antenna switch, an rf switch, a filter, an amplifier, a duplexer, a multiplexer, a mixer, etc.).

Low power wake-up receiver LR for low power performance, the current technology employs a single receive chain (1 RX chain) architecture, which may include an LR architecture with a separate single antenna, as shown in fig. 9. An LR architecture sharing one antenna of the MR may also be employed, as shown in fig. 10.

Depending on the value of the user equipment N, it is necessary to define the sampling interval, N _servLR, period T _servLR, etc. of the RRM measurement adapted to it when the RRM is offloaded, and to consider its influence when determining WUSoffset, in particular with reference to solution 1-1.

By introducing a switching-based multi-antenna for LR, not only is coverage improved by multi-antenna switching diversity, but also the similarity and comparability of the RRM measurement result of LR to the MR measurement result are improved, thereby reliably performing RRM measurement evaluation of MR by LR.

Embodiments of the present disclosure include network device power boosting (power boosting).

LR has slightly worse coverage performance than MR, so the network device will be beneficial to boost the coverage when transmitting low power signals (e.g., LP-SS, LP-WUS) for LR reception. However, not all network devices support power boosting of low power consumption signals, and when the network device performs power boosting on the reference signal LP-SS for LR and does not perform power boosting on a signal for MR, for example, the reference signal SSB (in this specification, various signals for MR may be referred to as normal signals), if the power difference between the two is unknown to the UE, a large error will be brought about when the RRM measurement result of LR is used for RRM evaluation of MR.

On the other hand, the reference signal LP-SS for LR and the reference signal SSB for MR are both power-boosted, but the power-boosted values are different, which also brings RRM measurement errors.

Embodiments of the present disclosure provide a method for a network device and a terminal device to cooperate to solve this problem. Before, simultaneously with or after the network device sends a signal (such as LP-SS) for LR reception to the terminal device and performs power boosting (power boosting), the network device informs the user device of power boosting information. According to embodiments of the present disclosure, the power boost information may include one or more of whether to power boost, a dB number of power boost, a difference between a power boost of a reference signal (e.g., LP-SS) for LR and a power boost of a reference signal (e.g., SSB) for MR, and so forth. The power boost information of the network device can be issued in a system information block, can be issued through signaling when the MR works, can be contained in a low-power consumption reference signal such as LP-SS, and is received and acquired by the UE through LR. After the UE acquires the power boost information, the UE may be used in RRM measurement and decision processes, which specifically includes consideration of factors related to power boost in determining WUSoffset, see the two methods that may be used in the foregoing determination WUSoffset.

Alternatively, the network device may decide whether to power up based on the capabilities or type of device being used. Implementations of LR mainly include envelope detection and OFDM-based detection. Envelope detection has lower power consumption but poorer radio frequency performance, and detection based on OFDM has higher power consumption and better radio frequency performance. According to the embodiment of the disclosure, the embodiment enabling the network device to flexibly configure power boost includes that the UE reports a terminal type or a terminal capability, such as the UE reports detection supporting OFDM, for example OFDM capability=support, in an MR operation state, and the network device does not boost the power of a low-power signal or boost a smaller power, such as 3dB, in an LR operation state. If the UE does not report detection of OFDM, for example, OFDM capability=not support or does not report by default, when the UE enters the LR operating state, the network device pushes up the power of the low-power signal or pushes up the power of the higher power, for example, pushing up by 6dB.

Similarly, the radio frequency index may also be different according to the UE type, for example, the UE reports that LR supports detection of OFDM, for example, OFDM capability=support, and then the terminal needs to meet a better radio frequency index, for example, the reference sensitivity REFSENS index value is better, and accordingly, the network device may not boost or less boost its low-power signal power to balance the radio frequency performance of the terminal device, and if the UE reports that no detection of OFDM is supported, for example, OFDM capability=not support or does not report by default, the terminal needs to meet a worse radio frequency index, for example, the reference sensitivity REFSENS index value is worse, and accordingly, the network device may more boost its low-power signal power to balance the radio frequency performance of the terminal device.

In summary, embodiments of the present disclosure provide an overall flowchart for power efficient RRM measurement using LR and MR synergy, as shown in fig. 18.

In step 18-1, a cell search is performed.

In steps 18-2 and 18-3, the ue obtains LR-related configuration via SIB (x), LR access. The UE may make measurements with LR.

In step 18-4, the ue performs energy-efficient serving cell/serving cell relaxation measurements and evaluations using LR for cell selection. According to an exemplary embodiment, step 18-4 may include:

The UE uses LR for serving cell RRM measurements, filtering the measurement results based on LR-related measurement intervals;

Deciding an LR measurement bias based on the first parameter configured by the NW and/or the second parameter calculated by the UE and/or the third parameter determined by the UE RF implementation;

UE scaling LR-based measurements to obtain MR-like results;

The UE decides an evaluation period T _servLR based on the LR-related relaxation factor and the RF antenna switching factor;

within T _servLR, the UE uses the scaled measurement to evaluate whether the cell is suitable for camping.

In step 18-5, the UE wakes up the MR based on the LR measurements according to the first or second applicability criteria.

At step 18-6, after the MR wakes up, a cell reselection is performed. According to embodiments of the present disclosure, partial neighbor measurements may be performed using an LR OFDM-based receiver structure. And, step 18-6 may include one of:

Case 1 ue wakes up MR and starts neighbor measurement. Since the MR has been awake at this time, cell reselection measurements may all be made on an MR basis;

case 2 mr and LR are on simultaneously, the UE uses LR for SSB (SSS) based neighbor part measurement and serving cell relaxation measurement, which may include:

n, combining the LR scaling measurement result and the MR measurement result, and executing neighbor cell sequencing by the UE;

and n, based on the mixed neighbor cell sequencing result, the UE automatically identifies and reselects the highest sequencing cell.

Through interaction between the network equipment and the user equipment, the network equipment can flexibly configure power boost, so that the user equipment can apply power boost information to RRM measurement and judgment, thereby reliably carrying out MR RRM measurement evaluation through LR, saving equipment power consumption and improving network coverage.

Fig. 14 is a block diagram of a user equipment UE or network node in a network according to the present invention.

Node devices in the network may be used to implement MN, SN, S-SN, T-SN, other candidate T-SNs, etc. in the present invention. Referring to fig. 14, a UE or a network node according to the present invention may include a transceiver 1410, a controller 1420, and a memory 1430. The transceiver 1410, the controller 1420, and the memory 1430 are configured to perform operations of methods and/or embodiments of the invention. Although the transceiver 1410, the controller 1420, and the memory 1430 are shown as separate entities, they may be implemented as a single entity, such as a single chip. The transceiver 1410, the controller 1420, and the memory 1430 may be electrically connected or coupled to each other. The transceiver 1410 may be one or more transceivers with different capabilities and may send and receive signals to and from other network nodes and/or UEs, such as base stations or core network nodes. The controller 1420 may include one or more processing units or processors and may control the network node to perform operations and/or functions in accordance with one of the embodiments described above. Memory 1430 may store instructions for implementing the operations and/or functions of one of the embodiments described above.

Those skilled in the art will appreciate that the above illustrative embodiments are described herein and are not intended to be limiting. It should be understood that any two or more of the embodiments disclosed herein may be combined in any combination. In addition, other embodiments may be utilized and other changes may be made without departing from the spirit and scope of the subject matter presented herein. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the figures, can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are contemplated herein.

Those of skill in the art will appreciate that the various illustrative logical blocks, modules, circuits, and steps described herein may be implemented as hardware, software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such design decisions should not be interpreted as causing a departure from the scope of the present disclosure.

Claims

1. A method performed by a user equipment (UE), wherein the UE comprises a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the method comprising:

The UE receives a first reference signal through a first receiver;

performing cell measurement based on the first reference signal;

Perform cell evaluation based on measurement results and parameters related to low power consumption;

Based on the cell evaluation result, it is determined whether to trigger the second receiver to perform corresponding processing.

2. The method according to claim 1, wherein performing cell measurement based on the first reference signal comprises:

Based on the first reference signal, measurements are performed on the serving cell and/or the neighboring cell in an idle state and/or an RRC inactive state.

3. The method according to claim 1, wherein performing cell measurement based on the first reference signal comprises:

Obtaining configuration information related to cell measurement;

determining, based on the first reference signal and configuration information related to cell measurement, signal reception power information and/or signal reception quality information corresponding to the first reference signal;

The configuration information related to the cell measurement includes: at least one of the measurement timing configuration period based on the first reference signal, the period of the first reference signal, the power configuration of the first reference signal, the base station power boost gain, and the configuration parameters of the low power wake-up signal LP-WUS.

The configuration parameters of the low power wake-up signal LP-WUS include at least one of: a paging indication, a WUS period, a UE group, a UE subgroup, a UE ID, and a system information indication.

4. According to the method of claim 1, the parameter related to low power consumption includes a first measurement bias, and the first measurement bias is related to at least one of the following: first parameter information configured by the network; second parameter information calculated by the UE; third parameter information related to the UE radio frequency implementation; and measurement margin.

5. The method according to claim 4, wherein

The first parameter information is related to at least one of the following: power boost related configuration information; and/or

The second parameter information is related to at least one of the following: a sensitivity difference between the first receiver and the second receiver; a difference in measurement results obtained by measuring using the first reference signal and the second reference signal; and/or

The third parameter information is related to at least one of the following: antenna structures of the first receiver and the second receiver related to UE radio frequency implementation.

6. The method according to claim 1 or 4, performing cell evaluation based on the measurement results and parameters related to low power consumption, comprising:

determining a first measurement bias based on the measurement result and a parameter related to low power consumption;

The measurement result is scaled, and cell evaluation is performed based on the first measurement offset and the scaled measurement result.

7. The method according to claim 6, wherein scaling the measurement result and performing cell evaluation based on the first measurement offset and the scaled measurement result comprises:

Scaling the measurement result based on the first receiver structure related parameter and/or the first low power consumption correction parameter;

The first measurement biases and scales the measurement result for cell evaluation.

8. The method according to claim 1, performing cell measurement based on the first reference signal, comprising:

Determining, based on the first reference signal and configuration information related to cell measurement, a reference signal received power and/or a reference signal received quality measurement result corresponding to the first reference signal;

The measurement results are filtered based on a measurement interval associated with the first receiver.

9. The method according to claim 8, wherein the measurement interval is related to at least one of the following parameters: a measurement timing configuration period of the first reference signal in the configuration information related to cell measurement, a measurement period of the first reference signal, and a discontinuous reception (DRX) period.

10. The method according to claim 3, wherein a measurement timing configuration period based on the first reference signal is greater than a maximum value of a measurement timing configuration period based on a second reference signal, wherein the second reference signal is received by the second receiver.

11. The method according to claim 1, wherein performing cell evaluation comprises:

Determine the cell evaluation granularity number and/or period based on at least one of a relaxation factor associated with the first receiver, a radio frequency antenna switching factor, an evaluation granularity, a DRX cycle relaxation ratio, and a frequency-related scaling factor,

Determining whether a cell evaluation criterion is met based on the measurement result, cell evaluation-related configuration information including low-power consumption-related parameters, and the number and/or period of cell evaluation granularity;

Determining whether to trigger the second receiver to perform corresponding processing based on the cell evaluation result includes:

If the cell evaluation criteria are met, the second receiver is triggered to perform cell reselection or cell selection.

12. The method according to claim 1, wherein the configuration information related to cell evaluation further includes: at least one of a period of a low power wake-up signal LP-WUS, a discontinuous reception DRX period, a low power cycle length, and a measurement timing period of a first reference signal.

13. The method according to claim 11, wherein the evaluation granularity comprises a first evaluation granularity associated with a first receiver and a second evaluation granularity associated with a second receiver,

The first evaluation granularity is determined by:

A first evaluation granularity related to the first receiver is determined based on at least one of a period of the first reference signal, a DRX period, and a measurement timing configuration period of the first reference signal in the configuration information related to the cell evaluation.

14. The method according to claim 11, wherein the cell evaluation criterion is related to at least one of the following:

Cell selection evaluation criteria threshold, cell selection reception level value, cell quality value,

The cell selection evaluation criterion threshold is a first threshold related to the first receiver, or a second threshold related to the second receiver.

15. The method according to claim 1, wherein performing cell evaluation comprises:

determining, based on the measurement result and the parameter related to low power consumption, whether a condition for triggering the second receiver is met;

If the conditions are met, the second receiver is woken up and neighbor cell measurement and/or serving cell measurement is triggered.

16. The method according to claim 1, wherein performing cell measurement based on the first reference signal comprises:

The serving cell is measured based on the first reference signal, and if the neighboring cell supports the low power consumption feature, the neighboring cell is measured based on the first reference signal.

17. The method according to claim 1, further comprising:

If the UE supports orthogonal frequency division multiplexing (OFDM) low power reception capability, the first receiver and the second receiver are triggered to measure the serving cell and the neighboring cell based on the second reference signal.

18. The method according to claim 17, wherein measuring the neighboring cell based on the second reference signal comprises:

For a first receiver supporting OFDM low power reception capability, based on the number of beams corresponding to the second reference signal that the first receiver needs to measure as indicated by the first receiver;

Perform neighboring cell RRM relaxation measurement based on the second reference signal received by the first receiver.

19. The method according to claim 16 or 17, further comprising:

Scaling a measurement result of a neighboring cell of the first receiver, and processing the scaled measurement result based on a second measurement offset;

sorting the processed measurement results and the neighboring cell measurement results of the second receiver;

According to the ranking results, reselect to the highest ranked cell.

20. A method performed by a network node, the method comprising:

Sending a low-power wake-up signal to the UE;

Determine the number of successful wake-up times of the UE;

After completing the preset number of low-power wake-up signal transmissions, the UE measurement result is determined according to the total number of cumulative transmissions and the number of successful wake-up times of the UE.

21. A method performed by a user equipment (UE), the UE comprising a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the method comprising:

The second receiver receives a message for entering, activating, exiting or deactivating a test mode sent by the network node, and sends a response message to the network node. The test mode indicates a specific behavior of the first receiver of the UE after receiving a low-power wake-up signal.

22. A method performed by a network node, the method comprising:

Sending a first reference signal to a UE, so that the UE performs cell measurement based on the first reference signal, the UE includes a first receiver and a second receiver, wherein the first receiver is a low-power receiver, and the first reference signal is received by the first receiver;

Evaluation related information related to the first receiver is sent to the UE, so that the UE performs cell evaluation based on the measurement result, the parameter related to low power consumption and the evaluation related information, and determines whether to trigger the second receiver to perform corresponding processing based on the cell evaluation result.

23. A method performed by a network node, comprising:

obtaining first information about a power boost of a reference signal;

sending second information about power boosting of a reference signal to a user equipment UE,

The second information about the power boost of the reference signal includes at least one of the following:

whether to boost power of a reference signal received by a first receiver of the UE, where the first receiver is a low-power receiver;

whether to boost the power of a reference signal received by a second receiver of the UE;

a power boost value of a reference signal received by the first receiver;

a power boost value of a reference signal received by a second receiver;

A difference between a power boost value of the reference signal received by the second receiver and a power boost value of the reference signal received by the first receiver.

24. A method performed by a user equipment (UE), comprising:

Sending first information about power boosting of a reference signal to a network node;

receiving second information about power boosting of the reference signal from the network node,

a power boost value of a reference signal received by the first receiver;

a power boost value of a reference signal received by a second receiver;

25. A method performed by a user equipment (UE), the UE comprising a first receiver and a second receiver, wherein the first receiver is a low power consumption receiver, the method comprising:

Using at least one of the multiple radio frequency front-end links of the UE, receiving a reference signal through a second receiver;

In the case where radio resource management is offloaded to the first receiver, at least one of the multiple RF front-end links is used based on the switching to receive a reference signal through the first receiver.

26. A user equipment (UE), comprising:

at least one transceiver configured to receive and transmit signals;

At least one processor is coupled to the at least one transceiver and is configured to perform the method of any one of claims 1-19, 21, 24-25.

27. A network node comprising:

at least one transceiver configured to receive and transmit signals;

At least one processor is coupled to the at least one transceiver and is configured to perform the method of any one of claims 20, 22-23.