WO2017215633A1 - Method and device for receiving and processing random access response rar - Google Patents

Abstract

The embodiments of the invention provide a method and device for receiving and processing a random access response (RAR). The method comprises: determining an overlap state between a first physical downlink control channel (PDCCH) decoding field and a second PDCCH decoding field; if the overlap state indicates that the first PDCCH decoding field and the second PDCCH decoding field are overlapping, deactivating a RAR window used by the first terminal to receive a RAR; and if it is determined that the overlap state between the first PDCCH decoding field and the second PDCCH decoding field changes from being overlapping to being not overlapping, activating the RAR window, and receiving, in the RAR window, a RAR. By temporarily deactivating a RAR window receiving a RAR, the invention prevents a terminal from false decoding a DCI not belonging thereto, and reducing power consumption of the terminal.

Description

Random access response RAR receiving processing method and device Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for receiving a random access response RAR.

Background technique

Machine to Machine (M2M) communication is an important subject of the 5th Generation mobile communication technology (5G), and an important application field for wireless communication in the future. In the M2M project, the 3rd Gederation Partnership Project (3GPP) proposed the NarowBand Internet of Things (NB-IoT) system for the low-cost and low-throughput characteristics of the terminal. The research sub-project aims to build a system similar to Long-Term Evolution (LTE) in the 200 kHz band to provide low-throughput wireless communication services for low-cost terminals. The downlink still uses Orthogonal Frequency Division Multiple Access (OFDMA) technology, and the uplink uses Single-Carrier Frequency Division Multiple Access (SC-FDMA) technology, and reuses it as much as possible. Or simplify the functional modules already in the LTE system. The subcarrier width increases the subcarrier width of 3.75 KHz in the uplink in addition to the subcarrier width of 15 KHz in the LTE system to further enhance the coverage capability of the uplink of the machine terminal. Currently, relevant technical standards are being studied within the 3GPP International Organization for Standardization.

In a conventional LTE system, different random access channels are distinguished by using different Random Access Radio Network Temporary Identity (RA-RNTI). The RA-RNTI corresponding to the physical random access channel (Physical Random Access Channel, PRACH) of the random access preamble performs a random access response (Random Access Response) in the subsequent random access response window. Receive for RAR). In this process, the RA-RNTI used by the terminal sends a random access preamble according to the first subframe number (0-9) where the PRACH that sends the random access preamble is located. The PRACH is calculated by indexing (0-5) in the frequency domain. It can be seen that the traditional RA-RNTI calculation method is calculated by using the subframe number of the first subframe occupied by the PRACH that transmits the random access preamble and the frequency index number of the PARCH as parameters, and supports at most one 10ms frame range. Identification of PRACH.

Since different terminals may send different random access preambles in the same PRACH, a random access response message often includes multiple RAR units, and each RAR unit includes a random access preamble identifier (Random Access Preamble Identity, referred to as Used as the target terminal for the RAR unit. If a terminal sends a random access preamble in the foregoing PRACH, it receives the RAR unit with the corresponding RAPID in the random access response message.

In summary, in a conventional LTE system, after transmitting a random access preamble, the terminal must detect all physical downlink control channels (Physical Downlink Control Channels, hereinafter referred to as PDCCHs) in a specified RAR window. And if the downlink control information (Downlink Control Information, DCI for short) information is successfully decoded by using the RA-RNTI corresponding to the PRACH in a certain PDCCH, all the random access response messages need to be received according to the DCI information. RAR unit. Finally, the RAR unit is found according to the RAPID or PRACH index of the RAR unit.

In the case where a plurality of coverages (CELs) exist, since the terminals of different CELs independently decode the PDCCHs in a certain period, the RA-RNTIs of different CELs are usually reusable. However, when PDCCH decoding regions of different CELs overlap, it may be problematic if different CELs still use the same RA-RNTI. This is because a smaller CEL (less PDCCH repetition number) terminal will successfully decode the DCI information scrambled by the RA-RNTI of the larger CEL. The NB IoT system DCI information in the related art carries the number of repetitions of the subsequent PDSCH data and the relative position information of the starting subframe (ie, the starting subframe position information relative to the current DCI, generally represented by a subframe offset amount). Therefore, the smaller CEL terminal can decode the DCI information of the RAR of the larger CEL with the same RA-RNTI, but when it reads the subsequent physical downlink shared channel with the repetition rule of the smaller CEL and the subframe offset rule ( Physical Downlink Shared Channel, referred to as PDSCH) data will fail. This is because the base station schedules its RAR with a repeating rule of larger CEL and a subframe offset rule, and the smaller CEL terminal will receive the RAR in the wrong place. At this time, there are two obvious problems: since the number of repetitions of a large CEL can be many times smaller than that of a smaller CEL, a smaller CEL terminal finds that it can correctly decode the DCI with the same RA-RNTI multiple times, but cannot receive it correctly. Corresponding RAR information. So it may decide that the RAR reception fails and restarts the second transmission of the PRACH. In addition, having the smaller CEL terminal continuously decode the DCI that does not belong to it and attempting to read the subsequent RAR information wastes the energy of the smaller CEL terminal, which is disadvantageous for the NB IoT system based on the MTC application.

In response to the above problems, a solution has been proposed in the related art: different coverages can be used with different RA-RNTI values. However, even if the small coverage UE does not read the subsequent RAR information, it will still try to demodulate the RAR scheduling information with the small coverage RA-RNTI in the large coverage PDCCH region. This process still wastes a lot of power.

Therefore, in the related art, there is a problem that a small CEL terminal decodes a DCI that does not belong to itself, resulting in failure to correctly receive corresponding RAR information and wasting power.

In view of the above problems, an effective solution has not been proposed in the related art.

Summary of the invention

The embodiment of the present invention provides a method and a device for receiving a random access response RAR, so as to solve at least the problem that the terminal existing in the related art can decode the DCI that does not belong to itself, thereby failing to correctly receive the corresponding RAR information and wasting power. .

In an embodiment of the present invention, a method for receiving a random access response RAR is provided, including: determining a first physical downlink control channel PDCCH decoding region of a first terminal and a second PDCCH decoding region of a second terminal An overlap state; when it is determined that the overlapping states of the first PDCCH decoding region and the second PDCCH decoding region are overlapping, turning off the RAR window of the first terminal for receiving the RAR; determining the first PDCCH decoding After the overlapping state of the region and the second PDCCH decoding region is changed from overlapping to non-overlapping, the RAR window is opened, and the RAR is received in the RAR window.

In another embodiment of the present invention, a random access response RAR reception is provided The processing method includes: determining at least one of the following information of the first physical downlink control channel PDCCH decoding area of the first terminal: a period, a start subframe position information, and the following information of the second PDCCH decoding area of the second terminal: a: a period, a start subframe position information, and at least one of the following information of the first PDCCH decoding region: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding region: The period, the start subframe position information is sent to the first terminal, where at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and the second PDCCH decoding area At least one of the following information: a period, a start subframe position information, where the first terminal turns off the first when determining that an overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping a RAR window of the terminal for receiving the RAR, and after determining that the overlapping state of the first PDCCH decoding region and the second PDCCH decoding region is changed from overlapping to non-overlapping, Start the RAR window, and receiving the RAR in the RAR window.

In another embodiment of the present invention, a receiving processing apparatus for a random access response RAR is provided, including: a first determining module, configured to determine a first physical downlink control channel PDCCH decoding area and a second of the first terminal An overlapping state of the second PDCCH decoding area of the terminal; the closing module is configured to: when it is determined that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping, shutting down the first terminal for receiving a RAR window of the RAR, configured to: after determining that an overlapping state of the first PDCCH decoding region and the second PDCCH decoding region is changed from overlapping to non-overlapping, turning on the RAR window, and in the RAR window Receiving the RAR.

In another embodiment of the present invention, a receiving processing apparatus for a random access response RAR is provided, including: a second determining module, configured to determine the following information of a first physical downlink control channel PDCCH decoding area of the first terminal; At least one of: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area of the second terminal: a period, a start subframe position information, and a sending module, configured to set the first PDCCH At least one of the following information of the decoding area: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a start subframe position information is sent to the first terminal, where At least one of the following information of the first PDCCH decoding area: a period, a start subframe bit Set information, and at least one of the following information of the second PDCCH decoding area: a period, a start subframe position information, where the first terminal determines the first PDCCH decoding area and the second PDCCH decoding area When the overlapping state is overlap, the RAR window of the first terminal for receiving the RAR is closed, and the overlapping state of the first PDCCH decoding region and the second PDCCH decoding region is determined to be changed from overlapping to non-overlapping. Thereafter, the RAR window is opened, and the RAR is received in the RAR window.

According to still another embodiment of the present invention, there is also provided a storage medium comprising a stored program, wherein the program is executed to perform the method of any of the above.

According to still another embodiment of the present invention, there is also provided a processor for running a program, wherein the program is executed to perform the method of any of the above.

According to the embodiment of the present invention, when the first physical downlink control channel PDCCH decoding region of the first terminal and the second PDCCH decoding region of the second terminal overlap, the RAR window for receiving the RAR of the first terminal is closed, preventing the first A terminal misreads the DCI of the RAR of the second terminal. The DCI information of the RAR that does not belong to the PDCCH overlap region of the different terminal is prevented from being decoded by the first terminal, so that the terminal existing in the related art can decode the DCI that does not belong to itself, and the corresponding RAR information cannot be correctly received. And the problem of wasting power, and thus achieving the purpose of preventing mis-decoding of DCI that does not belong to the terminal itself, and saving terminal power.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of a scenario provided by the present invention;

2 is a block diagram showing the hardware structure of a mobile terminal for receiving a RAR according to an embodiment of the present invention;

3 is a flowchart (1) of a method for receiving RAR according to an embodiment of the present invention;

4 is a schematic diagram of a small coverage UE suspending a RAR window according to an embodiment of the present invention;

FIG. 5 is a flowchart (2) of a method for receiving RAR according to an embodiment of the present invention; FIG.

6 is a flowchart of performing an RAR window pause function indication by a system message according to an embodiment of the present invention;

7 is a structural block diagram (1) of a RAR reception processing apparatus according to an embodiment of the present invention;

FIG. 8 is a structural block diagram (2) of a receiving processing apparatus for an RAR according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

FIG. 1 is a schematic diagram of a scenario provided by the present invention. In the scenario embodiment, if terminals of different CELs reuse the same RA-RNTI, when the scheduling information DCI of the RAR of the CEL2 is sent, the number of repetitions is relatively large. The first terminal of CEL1 misreads the DCI and demodulates it correctly. Wherein, CEL1 is the CEL of the first terminal, CEL2 is the CEL of the second terminal, and CEL1 is smaller than CEL2.

This is because the PDCCH decoding area of the first terminal of CEL1 completely falls within the PDCCH transmission area of CEL 2, and the first terminal of CEL 1 decodes the DCI using the same RA-RNTI. As shown in FIG. 1, the first terminal of CEL1 misreads the DCI information of CEL2 in both the first and second PDCCH decoding areas. The NB-IoT system DCI information in the related art carries the number of repetitions of the subsequent PDSCH data and the relative position information of the starting subframe, that is, the initial subframe position information relative to the current DCI, and generally uses one subframe offset. It is indicated that the first terminal of CEL1 can decode the DCI information of the RAR of CEl2 with the same RA-RNTI, but fails when it reads the subsequent RAR MAC PDU with the repetition rule of CEL1 and the subframe offset rule. This is because the base station is arranged with CEL2 repetition rules and subframe offset rules. At the location of its RAR, the first terminal of CEL1 will receive the RAR in the wrong place. At this time, there are two obvious problems: since the number of repetitions of CEL2 can be many times that of CEL1, the first terminal of CEL1 finds that it can correctly decode DCI with the same RA-RNTI multiple times, but cannot correctly receive the corresponding RAR. information. So it may decide that the RAR reception fails and restarts the second transmission of the PRACH. In addition, letting the first terminal of CEL1 continuously decode the DCI that does not belong to it and attempting to read the subsequent RAR information wastes the energy of the first terminal of CEL1, which is Machine-Type Communications (MTC). The application-oriented NB IoT system is disadvantageous. The following describes how to solve the above problems in combination with the embodiments:

Example 1

The method embodiment provided by Embodiment 1 of the present application can be executed in a mobile terminal, a computer terminal or the like. For example, the mobile terminal is operated on the mobile terminal. FIG. 2 is a block diagram showing the hardware structure of the mobile terminal of the RAR receiving processing method according to the embodiment of the present invention. As shown in FIG. 2, mobile terminal 20 may include one or more (only one of which is shown in FIG. 2) processor 202 (processor 202 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA. ), a memory 204 configured to store data, and a transmission device 206 configured as a communication function. It will be understood by those skilled in the art that the structure shown in FIG. 2 is merely illustrative and does not limit the structure of the above electronic device. For example, the mobile terminal 20 may also include more or fewer components than those shown in FIG. 2, or have a different configuration than that shown in FIG. 2.

The memory 204 can be configured as a software program and a module for storing application software, such as a program instruction/module corresponding to the RAR receiving processing method in the embodiment of the present invention, and the processor 202 runs the software program and the module stored in the memory 204, thereby The above methods are implemented by performing various functional applications and data processing. Memory 204 can include high speed random access memory and can also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 204 can further include memory remotely located relative to processor 202, which can be connected to mobile terminal 20 over a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, and a mobile communication Letter network and its combination.

Transmission device 206 is arranged to receive or transmit data via a network. The above specific network example may include a wireless network provided by a communication provider of the mobile terminal 20. In one example, the transmission device 206 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 206 can be a Radio Frequency (RF) module configured to communicate with the Internet wirelessly.

Example 2

FIG. 3 is a flowchart (1) of a method for receiving RAR according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:

Step S301: determining an overlapping state of the first physical downlink control channel PDCCH decoding region of the first terminal and the second PDCCH decoding region of the second terminal;

Step S302: When it is determined that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapped, the RAR window of the first terminal for receiving the RAR is closed;

Step S303: After determining that the overlapping state of the first PDCCH decoding region and the second PDCCH decoding region is changed from overlapping to non-overlapping, the RAR window is opened, and the RAR is received in the RAR window.

Wherein, the foregoing operation may be performed by the first terminal.

Through the above steps, when the first physical downlink control channel PDCCH decoding area of the first terminal overlaps with the second PDCCH decoding area of the second terminal, the RAR window of the first terminal for receiving the RAR is closed, thereby preventing the first A terminal misreads the DCI of the RAR of the second terminal. The DCI information of the RAR that does not belong to the PDCCH overlap region of the different terminal is prevented from being decoded by the first terminal, so that the terminal existing in the related art can decode the DCI that does not belong to itself, and the corresponding RAR information cannot be correctly received. And the problem of wasting power, and thus achieving the purpose of preventing mis-decoding of DCI that does not belong to the terminal itself, and saving terminal power.

In an optional embodiment, at least one of the following: the first PDCCH decoding area is smaller than the second PDCCH decoding area; the random access radio network corresponding to the first PDCCH decoding area temporarily identifies the RA-RNTI and the second PDCCH The RA-RNTI corresponding to the decoding area is the same. In this embodiment, when the first PDCCH decoding area is smaller than the second PDCCH decoding area, it indicates that the coverage capability of the first terminal is smaller than the coverage capability of the second terminal, and therefore, when the first PDCCH decoding area and the second PDCCH decoding area overlap When corresponding to the same RA-RNTI, the small coverage terminal successfully decodes the DCI information scrambled by the large coverage RA-RNTI, but reads the subsequent PDSCH data with the small coverage repetition rule and the subframe offset rule. The time will fail, which leads to a series of problems. For this type of problem, the RAR window of the first terminal can be temporarily closed, thereby effectively avoiding the error decoding of the DCI that does not belong to the first terminal itself.

In an optional embodiment, the overlapping state of the first physical downlink control channel PDCCH decoding region and the second PDCCH decoding region of the second terminal may be determined by:

Acquiring at least one of the following information of the first PDCCH decoding area sent by the base station: a period, a starting subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a starting subframe position information; At least one of the following information of the first PDCCH decoding region: a period, a starting subframe position, and at least one of the following information of the second PDCCH decoding region: a period, a starting subframe position information, a first PDCCH decoding region, and a second The overlapping state of the PDCCH decoding region. In this embodiment, the base station may separately configure a system information block for each terminal, and each system information block may carry related information of the PDCCH decoding area of each terminal (including at least one of the following information: a period of the PDCCH decoding area, The first subframe may be obtained by reading the system information block of the second terminal to obtain the information about the PDCCH decoding area of the second terminal; or the base station may also be related information of the PDCCH decoding area of each terminal. (including at least one of the following information: the period of the PDCCH decoding area, the starting subframe position information) is placed in a common area that can be read by different terminals, and the first terminal acquires the second terminal by reading the information stored in the public area. Information about the PDCCH decoding area.

In an optional embodiment, at least one of the following information of the first PDCCH decoding area sent by the base station is obtained by: a period, a start subframe position information, and At least one of the following information of the second PDCCH decoding area: a period, a start subframe position information: acquiring a first broadcast message sent by the base station, and acquiring at least one of the following information of the first PDCCH decoding area carried in the first broadcast message : a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding region: a period, a start subframe position information. In this embodiment, the base station may send related information of the PDCCH decoding area by using a broadcast message.

In an optional embodiment, the closing the RAR window of the first terminal for receiving the RAR includes: determining whether a suspension condition for suspending receiving the RAR is currently satisfied; and if the result of the determination is that the suspension condition is met, closing the A RAR window of a terminal for receiving RAR. In this embodiment, when it is determined that the first PDCCH decoding area and the second PDCCH decoding area overlap, it is further determined whether to close the RAR window according to whether the suspension condition is currently satisfied, and only if the suspension condition is met, then the RAR is closed. Window operation.

In an optional embodiment, the foregoing suspension condition may include: the RAR window in the working state of the first PDCCH decoding area overlaps with the second PDCCH decoding area; the base station supports the foregoing RAR window suspension function; the first terminal supports the foregoing RAR The function of window pause.

In an optional embodiment, before determining whether the pause condition for suspending receiving the RAR is met, the pause condition needs to be acquired, wherein the RAR window in the working state of the first PDCCH decoding area in the foregoing pause condition is The function of overlapping with the second PDCCH decoding area and the first terminal supporting the RAR window suspension may be determined by the terminal itself, and the foregoing function of the base station supporting the foregoing RAR window suspension may be determined by at least one of: receiving from the base station The second broadcast information, the function indication information carried in the second broadcast message is obtained, and the function of the base station supporting the RAR window suspension is determined according to the function indication information; of course, the foregoing manner from the base station may also be acquired by a protocol Function indication information. In this embodiment, the function of the base station supporting the RAR window suspension may be notified by the base station to the terminal. Of course, in the actual application, the protocol may also be configured. Therefore, the first terminal may determine, by means of a protocol agreement, that the base station supports the RAR window suspension function.

4 is a scenario embodiment of the solution of the present invention. The terminal of the CEL 1 suspends the operation of the RAR window in the PDCCH decoding area of the CEl 2, that is, suspends the PDCCH using the RA-RNTI to the CEL1. The area is demodulated; and the operation of the RAR window is resumed after the end of the overlap (i.e., the overlapping state described above changes from overlapping to non-overlapping). Optionally, in the case that the overlap area CEL2 shown in FIG. 4 has no service, the base station may schedule other terminals to perform service data transmission, but does not perform RAR scheduling, and the solution of the present invention does not affect the channel usage rate.

In an optional embodiment, the overlapping of the first PDCCH decoding region and the second PDCCH decoding region may be determined by: at least one of following information of the first PDCCH decoding region: a period, a start The subframe position, and the acquired information of the second PDCCH decoding area, at least one of the following: the period, the start subframe position information determines that the first PDCCH decoding area and the second PDCCH decoding area overlap end. After determining that the overlap of the first PDCCH decoding region and the second PDCCH decoding region ends, the RAR window may be opened and the RAR is received in the RAR window. It should be noted that the length of the RAR window is affected after the RAR window is closed. Generally, the RAR window length is limited to a fixed length range. Therefore, in order to limit the effective RAR window length, The RAR window may be processed in a fixed length range, including: determining the closing time of the RAR window; after the RAR window is opened, processing the RAR window by one of the following: extending the RAR window according to the closing time, The RAR window is postponed according to the above-mentioned off time; the RAR is received in the RAR window after processing.

With the above embodiment, temporarily turning off the RAR window for receiving the RAR can save power consumption on the terminal side. For the case where there is no service in the overlapping area, the base station can schedule other terminals to perform service data transmission, but does not perform RAR scheduling. Therefore, the solution in the foregoing embodiment does not affect the channel usage rate.

Example 3

Another embodiment of the present invention provides a method for receiving a random access response RAR. FIG. 5 is a flowchart (2) of a method for receiving RAR according to an embodiment of the present invention. As shown in FIG. 5, the method includes :

Step S501: Determine a first physical downlink control channel PDCCH decoding area of the first terminal At least one of the following information: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area of the second terminal: a period, a start subframe position information;

Step S502: Send at least one of the following information of the first PDCCH decoding area: the period, the start subframe position information, and the following information of the second PDCCH decoding area: the period, the start subframe position information, to the first And a terminal, where at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a start subframe position information, where When determining that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping, the terminal turns off the RAR window of the first terminal for receiving the RAR, and determines the first PDCCH decoding area and the second PDCCH decoding area. After the overlapping state changes from overlapping to non-overlapping, the RAR window is opened and the RAR is received in the RAR window.

Wherein, the above operation may be performed by a base station.

Through the above steps, when the first physical downlink control channel PDCCH decoding area of the first terminal overlaps with the second PDCCH decoding area of the second terminal, the RAR window of the first terminal for receiving the RAR is closed, thereby preventing the first A terminal misreads the DCI of the RAR of the second terminal. The DCI information of the RAR that does not belong to the PDCCH overlap region of the different terminal is prevented from being decoded by the first terminal, so that the terminal existing in the related art can decode the DCI that does not belong to itself, and the corresponding RAR information cannot be correctly received. And the problem of wasting power, and thus achieving the purpose of preventing mis-decoding of DCI that does not belong to the terminal itself, and saving terminal power.

In an optional embodiment, at least one of the following: the first PDCCH decoding area is smaller than the second PDCCH decoding area; the random access radio network corresponding to the first PDCCH decoding area temporarily identifies the RA-RNTI and the second PDCCH The RA-RNTI corresponding to the decoding area is the same

In an optional embodiment, at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a start subframe Sending the location information to the first terminal includes: sending a first broadcast message, where the first broadcast message carries the following information of the first PDCCH decoding area to One of the less: the period, the start subframe position information, and at least one of the following information of the second PDCCH decoding area: period, start subframe position information.

In an optional embodiment, the method further includes: notifying, by at least one of the following, a function indication information indicating a function of the base station to support the RAR window suspension to the first terminal: by using the second broadcast message The terminal sends the function indication information, and sends the function indication information to the first terminal in a manner agreed by the protocol.

According to the foregoing embodiment, when determining that the first PDCCH decoding area and the second PDCCH decoding area overlap, the first terminal needs to determine whether to close the RAR window according to whether the suspension condition is currently satisfied, and if the suspension condition is met, Close the RAR window of the first terminal. The foregoing suspension condition includes: the RAR window in the working state in the first PDCCH decoding area overlaps with the second PDCCH decoding area; the base station supports the RAR window suspension function; and the first terminal supports the RAR window suspension function.

The following describes the invention by taking a terminal (also referred to as UE) and a base station as an example:

The technical problem to be solved by the present invention is to prevent the small coverage UE from misreading the DCI of the RAR of the large coverage UE by temporarily turning off the random access response window of the small coverage UE when different coverage RA-RNTIs are reused, and save the UE side as much as possible. Power consumption. Therefore, in the embodiment of the present invention, when the UE finds that its PDCCH decoding area overlaps with other PDCCH decoding areas of the larger coverage, the RAR window is temporarily closed, and the RAR window is re-opened after the overlapping area ends, and the RAR is continued. receive. Optionally, after the RAR window is suspended for a period of time, the UE should extend the corresponding time for its RAR window; optionally, the UE may also remove the paused time in the RAR window length calculation. Optionally, the base station can configure different system information blocks for different coverages. At this time, the UE can obtain different PDCCH decoding regions of different coverage by reading other larger coverage system information. Optionally, the base station may: at least one of the following information of different coverage: a PDCCH demodulation period, and a start subframe position information, are placed in a common area that different covered UEs need to read. At this time, the UE can obtain different coverage PDCCH decoding areas by reading different coverage common system information. Optionally, the base station may broadcast, in the system broadcast message, whether the UE needs to perform temporary closing of the RAR window in different overlapping PDCCH overlapping areas. After receiving the message, the UE presses The base station indicates to coordinate its own RAR reception behavior.

FIG. 4 is a diagram showing an embodiment of a solution for a small coverage UE to suspend a RAR window according to an embodiment of the present invention. As shown in FIG. 4, the UE that covers CEL1 will pause the operation of the RAR window in the PDCCH decoding area of the large coverage CEL2, that is, suspend the PDCCH region of the coverage by using the RA-RNTI. The RAR window pause requires three specific conditions:

The first is that the small coverage CEL1 must have one RAR window in operation, and the RAR window overlaps with some other larger covered PDCCH demodulation area. As shown in FIG. 4, when the PDCCH demodulation area of CEL2 and a certain RAR window of CEL1 overlap, this condition is satisfied.

The second is that the base station supports the above-mentioned RAR window suspension function.

The third is the function that the UE needs to support the above RAR window pause.

If the above conditions are satisfied, the user of CEL1 should suspend the operation of the RAR window in the PDCCH demodulation area of the large coverage CEL2, and resume the operation of the RAR window after the demodulation area ends. Optionally, since the coverage of an RAR window is generally limited to a fixed length range, the coverage should be extended for the RAR window after the RAR window operation is suspended. Optionally, the time period of the pause (corresponding to the delayed RAR window described above) may also be removed in the RAR window length calculation.

FIG. 6 is a flowchart of an embodiment of performing a RAR window pause function indication by using a system message according to an embodiment of the present invention. As shown in Figure 6, the implementation process is as follows:

Step S601: The base station sends a function indication (corresponding to the foregoing function indication information) of “RAR window pauseable” in a system broadcast message (corresponding to the foregoing second broadcast message), instructing the UE to pause the RAR window under certain conditions. Operation. Optionally, the indication can be implemented by a method agreed by the protocol without being sent in a broadcast message. Optionally, the base station may also broadcast the foregoing function indication. Optionally, there may be one or more of the following RAR window pause conditions:

The coverage of the UE originally has one RAR window in operation, and the RAR window overlaps with some other large coverage PDCCH demodulation area.

The base station supports the above-mentioned RAR window suspension function.

The UE supports the above-mentioned RAR window suspension function.

Step S602: After transmitting the “RAR window pauseable” function indication, the base station performs scheduling and transmission of subsequent data and RAR according to the “RAR window pauseable” scenario.

Step S603, after receiving the "RAR window pauseable" indication, the UE starts detecting each RAR window pause condition, and performs a RAR window pause operation when the condition is satisfied, and restarts the operation of the RAR window when the condition is satisfied.

Example 4

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

In the embodiment, a RAR receiving and processing device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 7 is a structural block diagram (1) of a receiving processing apparatus for an RAR according to an embodiment of the present invention. As shown in FIG. 7, the apparatus includes a first determining module 72, a closing module 74, and an opening module 76. Be explained:

The first determining module 72 is configured to determine an overlapping state of the first physical downlink control channel PDCCH decoding area of the first terminal and the second PDCCH decoding area of the second terminal, and the closing module 74 is connected to the first determining module 72, and is configured to To determine when the first PDCCH is determined When the overlapping state of the decoding region and the second PDCCH decoding region is overlapping, the RAR window for receiving the RAR of the first terminal is closed; the opening module 76 is connected to the closing module 74, and is configured to determine the first PDCCH decoding region. After the overlapping state with the second PDCCH decoding region is changed from overlapping to non-overlapping, the above RAR window is opened, and the RAR is received in the RAR window.

In an optional embodiment, at least one of the following: the first PDCCH decoding area is smaller than the second PDCCH decoding area; the first PDCCH decoding area corresponding to the random access radio network temporary identifier RA-RNTI and the second PDCCH decoding The RA-RNTI corresponding to the area is the same.

In an optional embodiment, the first determining module 72 may determine an overlapping state of the first PDCCH decoding area of the first terminal and the second PDCCH decoding area of the second terminal by acquiring the first PDCCH sent by the base station. At least one of the following information of the decoding area: a period, a starting subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a starting subframe position information; and the following information according to the first PDCCH decoding area At least one of: a period, a start subframe position, and at least one of the following information of the second PDCCH decoding region: the period, the start subframe position information determines an overlapping state of the first PDCCH decoding region and the second PDCCH decoding region .

In an optional embodiment, the first determining module 72 may obtain at least one of the following information of the first PDCCH decoding area sent by the base station: a period, a start subframe position information, and a second PDCCH decoding. At least one of the following information of the area: a period, a start subframe position information: acquiring a first broadcast message sent by the base station, and acquiring at least one of the following information of the first PDCCH decoding area carried in the first broadcast message: period, start Subframe position information, and at least one of the following information of the second PDCCH decoding area: period, starting subframe position information.

In an optional embodiment, the closing module 74 includes a determining unit and a closing unit, wherein the determining unit is configured to determine whether a pause condition for temporarily receiving the RAR is currently satisfied; and the closing unit is set to the judgment result of the determining unit. In order to satisfy the pause condition, the RAR window of the first terminal for receiving the RAR is closed.

In an optional embodiment, the foregoing suspension condition includes: an RAR window in an active state in the first PDCCH decoding region overlaps with the second PDCCH decoding region; a base station supports a RAR window suspension function; and the first terminal supports the RAR window. Paused feature.

In an optional embodiment, the apparatus further includes a processing module, configured to determine, by at least one of the following manners, that the base station supports the RAR window suspension function: receiving the second broadcast message from the base station, and acquiring the second broadcast message The function indication information is used to determine, according to the function indication information, a function that the base station supports the RAR window suspension; obtain the function indication information from the base station by using a protocol, and determine, according to the function indication information, the function that the base station supports the RAR window suspension; It is determined that the base station supports the above-mentioned RAR window suspension function.

In an optional embodiment, the foregoing opening module 76 may open the RAR window and receive the RAR in the RAR window: determine the closing time of the RAR window; after opening the RAR window, perform one of the following on the RAR window. Processing: extending the RAR window according to the closing time, delaying the RAR window according to the closing time; receiving the RAR in the processed RAR window.

FIG. 8 is a structural block diagram (2) of a RAR reception processing apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes a second determination module 82 and a transmission module 84, which are described below:

The second determining module 82 is configured to determine at least one of the following information of the first physical downlink control channel PDCCH decoding area of the first terminal: a period, a start subframe position information, and a second PDCCH decoding area of the second terminal At least one of the information: a period, a start subframe position information, and a sending module 84, connected to the second determining module 82, configured to set at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information And at least one of the following information of the second PDCCH decoding area: the period, the start subframe position information is sent to the first terminal, where at least one of the following information of the first PDCCH decoding area: a period, a start subframe position At least one of the information and the following information of the second PDCCH decoding area: the period, the start subframe position information is used by the first terminal to close the first when determining that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping Terminal for receiving RAR The RAR window, and after determining that the overlapping state of the first PDCCH decoding region and the second PDCCH decoding region is changed from overlapping to non-overlapping, the RAR window is turned on, and the RAR is received in the RAR window.

In an optional embodiment, at least one of the following: the first PDCCH decoding area is smaller than the second PDCCH decoding area; the random access radio network corresponding to the first PDCCH decoding area temporarily identifies the RA-RNTI and the second PDCCH The RA-RNTI corresponding to the decoding area is the same

In an optional embodiment, the sending module 84 may: at least one of the following information of the first PDCCH decoding area: the period, the starting subframe position information, and the following information of the second PDCCH decoding area: And sending, by the first terminal, the first broadcast message, where the first broadcast message carries at least one of the following information of the first PDCCH decoding area: a period, a start subframe The location information, and at least one of the following information of the second PDCCH decoding region: a period, a start subframe position information.

In an optional embodiment, the apparatus further includes a notification module, configured to notify the first terminal of the function indication information indicating that the base station supports the RAR window suspension function by at least one of: transmitting, by using the second broadcast message The first terminal sends the foregoing function indication information, and sends the foregoing function indication information to the first terminal in a manner agreed by the protocol.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the functions of the foregoing modules may be implemented by the same processor; or, the above modules The functions in any combination are implemented by different processors.

Embodiments of the present invention also provide a storage medium. Alternatively, in the embodiment, the above storage medium may be set to store program code for performing the above steps.

Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

Optionally, in the embodiment, the processor performs the above steps according to the stored program code in the storage medium.

In the embodiment of the present invention, a temporary closing mechanism of the RAR window is designed for the NB IoT system to prevent the small coverage UE from misreading the DCI of the RAR of the large coverage UE when the same coverage reuses the same RA-RNTI. Through this mechanism, different coverage can better reuse RA-RNTI. Secondly, the mechanism avoids that the small coverage UE continuously decodes the DCI information of the RAR that does not belong to it in the PDCCH overlapping area of different coverage, and greatly saves the power consumption of the user side. Finally, for the case where there is no service in the large coverage area of the overlap region, the base station can schedule other users to perform service data transmission, but does not perform RAR scheduling. Therefore, the present invention does not affect the channel usage rate.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the method and apparatus for receiving a random access response (RAR) provided by the embodiment of the present invention have the following beneficial effects: by temporarily turning off the RAR window for receiving the RAR, and avoiding mis-decoding DCI that does not belong to the terminal itself, saving The power consumption on the terminal side.

Claims (15)

A receiving processing method for a random access response RAR, comprising: Determining an overlapping state of the first physical downlink control channel PDCCH decoding region of the first terminal and the second PDCCH decoding region of the second terminal; When it is determined that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping, the RAR window of the first terminal for receiving the RAR is closed; After determining that the overlapping state of the first PDCCH decoding region and the second PDCCH decoding region changes from overlapping to non-overlapping, the RAR window is opened, and the RAR is received in the RAR window. The method of claim 1 comprising at least one of: The first PDCCH decoding area is smaller than the second PDCCH decoding area; The random access radio network temporary identifier RA-RNTI corresponding to the first PDCCH decoding region is the same as the RA-RNTI corresponding to the second PDCCH decoding region. The method according to claim 1 or 2, wherein determining an overlapping state of the first PDCCH decoding area of the first terminal and the second PDCCH decoding area of the second terminal comprises: Acquiring at least one of the following information of the first PDCCH decoding area sent by the base station: a period, a starting subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a starting subframe position information; Determining, according to at least one of the following information of the first PDCCH decoding region: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding region: a period, a start subframe position information, An overlapping state of the first PDCCH decoding region and the second PDCCH decoding region. The method according to claim 3, wherein at least one of the following information of the first PDCCH decoding area sent by the base station is acquired: a period, a starting subframe position information, and the following information of the second PDCCH decoding area At least one of: the period, the start subframe position information includes: Obtaining a first broadcast message sent by the base station; Acquiring at least one of the following information of the first PDCCH decoding area carried in the first broadcast message: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: a period , start subframe position information. The method according to claim 1 or 2, wherein the closing of the RAR window of the first terminal for receiving the RAR comprises: Determining whether a suspension condition for suspending reception of the RAR is currently satisfied; If the result of the determination is that the suspension condition is satisfied, the RAR window of the first terminal for receiving the RAR is closed. The method of claim 5 wherein said suspending condition comprises: An RAR window in an active state in the first PDCCH decoding region overlaps with the second PDCCH decoding region; The base station supports the function of suspending the RAR window; The first terminal supports the function of the RAR window suspension. The method of claim 6, wherein the function of the base station to support the RAR window suspension is determined by at least one of: Receiving a second broadcast message from the base station, acquiring function indication information carried in the second broadcast message, determining, according to the function indication information, that the base station supports the RAR window pause function; Acquiring the function indication information from the base station by using a protocol, and determining, according to the function indication information, that the base station supports the RAR window suspension function; The function of the base station supporting the RAR window suspension is determined by a protocol agreement. The method of claim 1 or 2, wherein opening the RAR window and receiving the RAR in the RAR window comprises: Determining a closing time of the RAR window; After the RAR window is opened, the RAR window is processed according to one of the following: extending the RAR window according to the closing time, and delaying the RAR window according to the closing time; The RAR is received in a RAR window after processing. A receiving processing method for a random access response RAR, comprising: Determining at least one of the following information of the first physical downlink control channel PDCCH decoding region of the first terminal: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding region of the second terminal: a period, Start subframe position information; Transmitting at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a start subframe position information, to the The first terminal, where at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a starter The frame location information is used by the first terminal to close the first terminal when determining that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping And a RAR window for receiving the RAR, and after determining that the overlapping state of the first PDCCH decoding region and the second PDCCH decoding region is changed from overlapping to non-overlapping, turning on the RAR window, and in the RAR window Receiving the RAR. The method of claim 9 including at least one of the following: The first PDCCH decoding area is smaller than the second PDCCH decoding area; The random access radio network temporary identifier RA-RNTI corresponding to the first PDCCH decoding region is the same as the RA-RNTI corresponding to the second PDCCH decoding region. The method according to claim 9 or 10, wherein at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and the following information of the second PDCCH decoding area is at least A: sending the periodic, initial subframe position information to the first terminal includes: Sending a first broadcast message, where the first broadcast message carries at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and a lower of the second PDCCH decoding area At least one of the information: period, starting subframe position information. The method according to any one of claims 9 to 11, wherein the method further comprises: notifying the function indication information indicating a function of the base station supporting the RAR window suspension by at least one of the following manners First terminal: Transmitting, by the second broadcast message, the function indication information to the first terminal; The function indication information is sent to the first terminal in a manner agreed by the protocol. A receiving processing apparatus for random access response RAR, comprising: a first determining module, configured to determine an overlapping state of the first physical downlink control channel PDCCH decoding region of the first terminal and the second PDCCH decoding region of the second terminal; And the closing module is configured to: when it is determined that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping, close the RAR window of the first terminal for receiving the RAR; Opening a module, configured to: after determining that an overlapping state of the first PDCCH decoding area and the second PDCCH decoding area changes from overlapping to non-overlapping, turning on the RAR window, and receiving the RAR in the RAR window . A receiving processing apparatus for random access response RAR, comprising: a second determining module, configured to determine at least one of the following information of the first physical downlink control channel PDCCH decoding area of the first terminal: a period, a start subframe position information, and the following information of the second PDCCH decoding area of the second terminal At least one of: period, starting subframe position information; And a sending module, configured to set at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: a period, a start subframe The location information is sent to the first terminal, where at least one of the following information of the first PDCCH decoding area: a period, a start subframe position information, and at least one of the following information of the second PDCCH decoding area: The period, the start subframe position information is used by the first terminal to close the first terminal for receiving the RAR when determining that the overlapping state of the first PDCCH decoding area and the second PDCCH decoding area is overlapping And the RAR window is opened, and after determining that the overlapping state of the first PDCCH decoding region and the second PDCCH decoding region is changed from overlapping to non-overlapping, the RAR window is opened, and the RAR window is received in the RAR window. RAR. A storage medium, the storage medium comprising a stored program, wherein the program is executed to perform the method of any one of claims 1 to 12.

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