CN111817835A - A beam switching instruction method, device and system - Google Patents

Abstract

The application discloses a beam switching indication method, a device and a system, which are used for a multi-beam and multi-BWP mobile communication cell, wherein the method comprises the following steps: allocating one BWP per beam, one BWP for each beam at least; the downlink control signaling is used for notifying the terminal device of BWP (uplink/downlink carrier wave protocol) identifiers after beam switching and BWP identifiers of downlink beams after switching; the upstream BWP and the downstream BWP are the same. The application also comprises a terminal device, a network device and a mobile communication system using the method. The method and the device solve the problem of indication of beam switching in different frequency deployment scenes by adopting different BWPs, and reduce switching time delay.

Description

A beam switching instruction method, device and system

technical field

The present application relates to the field of wireless communication technologies, and in particular, to a beam switching indication method, device, and system.

Background technique

In NR systems such as non-terrestrial communication (NTN), a cell (PCI) can have multiple beams. If each beam of a cell uses the same carrier frequency, the bandwidth allocated to each beam is larger, but one Terminals with small beam coverage suffer from co-channel interference from adjacent beam signals. Therefore, different beams of a cell may use different carrier frequencies, for example, adjacent beams are allocated different bandwidth parts (Bandwidth Part, BWP) to avoid co-channel interference.

BWP is a measure taken to reduce the power consumption of the mobile phone in the 5G system, which refers to a subset of the entire bandwidth. For the same terminal, only one BWP can be activated in the uplink and downlink at the same time, and the terminal device performs data transmission and reception and PDCCH monitoring on this BWP.

When accessing the terminal equipment, the transmitting end transmits synchronization and broadcast signal blocks (SS/PBCH Block, SSB) on each beam. During data transmission, the sender sends the SSB on the initial bandwidth part (BWP0), and then sends data to the terminal device on the bandwidth part (BWP2) allocated to the terminal device.

The terminal device in the RRC idle state will measure the SSB on the BWP0 for beam switching; for the terminal device in the RRC connected state, if the terminal supports a large bandwidth, it needs to measure the BWP0 and the BWP2 allocated to it at the same time. If the bandwidth supported by the terminal device is small, It is necessary to frequently switch to BWP0 for measurement.

In addition, in the scenario of inter-frequency deployment, each BWP only corresponds to a part of the beam. When the beam is switched, the signal quality of all the beams cannot be measured on the allocated BWP, so the information of the target BWP and the information of the target beam cannot be directly obtained. .

SUMMARY OF THE INVENTION

The present application proposes a beam switching indication method, device and system to solve the problem of frequent cell switching under the condition of inter-frequency deployment in the prior art. The present application is particularly applicable in satellite communications.

In a first aspect, an embodiment of the present application provides a beam switching indication method, which is used in a multi-beam (TCI state) and multi-BWP mobile communication cell, including the following steps:

One BWP is allocated to each beam, and each BWP is used for at least one beam;

In each BWP, configure downlink channel state information reference signals (CSI-RS) of multiple beams, where the multiple beams include beams using different BWPs;

The downlink control signaling is used to notify the terminal equipment of the uplink and downlink carrier BWP identifiers after beam switching, and the downlink beam identifier after switching;

The BWP for the upside is the same as the BWP for the downside.

Optimally, the plurality of beams include all beams within a cell.

Preferably, the downlink control signaling includes N m-bit command units; each command unit includes at least one BWP identifier and at least one beam identifier;

The maximum number of BWPs and the maximum number of beams that the m bits can be used to identify are not less than the total number of BWPs and the total number of beams of the cell; the N command units respectively correspond to one terminal device.

Alternatively, the downlink control signaling only includes at least one BWP identifier and at least one beam identifier after handover dedicated to one terminal device.

The method described in the first aspect of the present application, used in a terminal device, includes the following steps:

At the initial BWP indicated by the initial CORESET, the information used to indicate the location of the random access resource is received, the random access request and/or connection request is sent, the high-level signaling is received, and the identifier of the first BWP dedicated to the terminal device and the first BWP are obtained. The identification of a beam.

Preferably, the method described in this application is used for terminal equipment, and further comprises the following steps:

Data is received at the first BWP and the first beam, and when the detected information satisfies the beam switching condition, a beam switching request is sent at the first BWP, including the identifier of at least one candidate beam.

Preferably, the method described in this application is used for terminal equipment, and further comprises the following steps:

Receive the downlink control signaling at the first BWP and the first beam, and identify the identifier of the second BWP and the identifier of the second beam corresponding to the terminal device;

send confirmation information;

Switch to the second BWP and the second beam for receiving downlink control information and downlink data.

Preferably, the method described in this application is used for terminal equipment, and further comprises the following steps:

The confirmation information is sent at the first BWP.

The method described in the first aspect of the present application is used for network equipment, and further includes the following steps:

Send high-level signaling at the initial BWP indicated by the initial CORESET to configure at least one BWP dedicated to the terminal device and the downlink beam corresponding to each BWP, and activate the first BWP; the first BWP corresponds to the first beam .

Preferably, the method described in this application is used for network equipment, and further comprises the following steps:

receiving a beam switching request at the first BWP, including the identifier of at least one candidate beam;

Send the downlink control signaling on the first BWP and the first beam, and include the identifier of the second BWP and the identifier of the second beam in the command unit corresponding to the terminal device;

receive confirmation;

Switch to the second BWP and the second beam for sending downlink control information and downlink data.

Preferably, the method described in this application is used for network equipment, and further comprises the following steps:

Switch to the second BWP within a set period of time after receiving the confirmation information.

Preferably, the method described in this application is used for network equipment, and further comprises the following steps:

The confirmation information is received at the first BWP.

In the second aspect, the present application also proposes a network device for the method described in the first aspect of the present application. At least one BWP of the terminal and a downlink beam corresponding to each BWP, and activate the first BWP; the first BWP corresponds to the first beam.

Preferably, the network device is further configured to receive a beam switching request at the first BWP, including the identifier of at least one candidate beam; send the downlink control signaling at the first BWP and the first beam, and send the downlink control signaling at the first BWP and the first beam. The command unit corresponding to the terminal device includes the identifier of the second BWP and the identifier of the second beam; receiving confirmation information; switching to the second BWP and the second beam for sending downlink control information and downlink data.

Further, the present application also proposes a network device, comprising: a memory, a processor, and a computer program stored on the memory and running on the processor, the computer program being implemented when executed by the processor Any one of the steps of the method described in the embodiments of the network device may be used.

In a third aspect, an embodiment of the present application further provides a terminal device, which is used in the method described in any one of the embodiments of the present application. The terminal device is configured to receive an initial BWP indicated by the initial CORESET for indicating random access. Resource location information, send random access request and/or connection request, receive high-level signaling, and obtain the identifier of the first BWP dedicated to the terminal device and the identifier of the first beam.

Further, the terminal device is further configured to receive data at the first BWP and the first beam, and when the detected information meets the beam switching condition, send a beam switching request at the first BWP, including at least one The identification of the candidate beam.

Further, the terminal device also receives the downlink control signaling in the first BWP and the first beam, identifies the identifier of the second BWP and the identifier of the second beam corresponding to the terminal device; sends confirmation information; switches to The second BWP and the second beam are used for receiving downlink control information and downlink data.

An embodiment of the present application further proposes a terminal device, including: a memory, a processor, and a computer program stored on the memory and running on the processor, where the computer program is executed by the processor to realize the present invention Any one of the application can be used for the steps of the method described in the embodiment of the terminal device.

In a fourth aspect, the present application further provides a computer-readable medium, where a computer program is stored on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented.

In a fifth aspect, the present application further provides a mobile communication system, which includes at least one embodiment of any terminal device in the present application and at least one embodiment of any network device in the present application.

The above-mentioned at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

For the inter-frequency deployment scenario where a cell has multiple beams and adjacent beams are sent in different BWPs, new downlink control signaling is introduced to instruct the terminal to switch beams. The downlink control signaling can instruct the terminal to go up and down It is possible to switch to the same BWP at the same time, and to receive the downlink control beam after switching to the BWP, so as to instruct the terminal to send uplink data and receive uplink data, which solves the problem of beam switching in different frequency deployment scenarios using different BWPs. Reduce handover delay. At the same time, the uplink HARQ confirmation of the downlink control signaling is introduced to avoid resource waste caused by inconsistent understanding between the base station and the terminal.

Especially, in the case of multiple beams in a cell in satellite communication, and in a system where multiple BWPs are used to achieve a frequency reuse factor greater than 1, downlink control signaling is designed to complete beam switching to effectively avoid cell switching.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

Figure 1 is a schematic diagram of a multi-beam frequency reuse cell;

Fig. 2 is the embodiment flow chart of the method of the application;

FIG. 3 is a flowchart of an embodiment in which the method of the present application is applied to a network device;

FIG. 4 is a flowchart of an embodiment in which the method of the present application is applied to a terminal device;

5 is a schematic diagram of an embodiment of a network device;

6 is a schematic diagram of an embodiment of a terminal device;

FIG. 7 is a schematic structural diagram of a network device according to another embodiment of the present invention;

FIG. 8 is a block diagram of a terminal device according to another embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In systems such as non-terrestrial communications (NTN), a cell (PCI) can have multiple beams. For example, a cell has L largest SSB directions, which are distinguished by SSB indexes, and different beams transmit SSBs respectively. For the terminal device in the idle state, only one SSB mapped to the PCI needs to be detected, which can realize fast and simple synchronization. For the terminal device in the connected state, due to the dedicated SSB for the beam and the reference signal ( CSI RS) can be used to associate beams that meet the requirements to avoid interruption of packet transmission and increase of signaling overhead caused by cell handover. If each beam of a cell uses the same carrier frequency, the bandwidth allocated to each beam is larger, but a terminal with a small coverage of a beam will cause co-channel interference of signals sent on adjacent beams, so different beams in a cell can Using different carrier frequencies, one way is to allocate different BWPs to adjacent beams of a cell to avoid co-channel interference. As described in the background art, BWP is a measure used in the 5G system to reduce the power consumption of the mobile phone, and BWP refers to a subset of the entire bandwidth. For the same terminal, at any time, only one BWP can be activated in the uplink and the downlink, and the terminal device performs data transmission and reception and PDCCH monitoring on this BWP.

About the BWP switch. There are mainly three ways of BWP handover: BWP handover based on higher layer signaling (RRC), BWP handover based on timer (Timer) and BWP handover based on downlink control information (DCI). Among them, the DCI-based BWP handover is the most flexible way among the three ways. Handover can be initiated as long as there is DCI. For example, there is a BWP index field in DCI 1-1 for indicating the target downlink BWP for handover, and similarly, there is a BWP index field in DCI 0-1 for indicating the target uplink BWP for handover. In NR, DCI 1-1 and DCI 0-1 are used to schedule data, and can instruct BWP to switch. The prior art protocol does not support that DCI is only used to indicate BWP handover without scheduling data.

The SSB and SIB corresponding to all beams are sent on the initial BWP (BWP0). The initial access terminal first detects the SSB, reads the SIB, and performs RACH access on the BWP0. After entering the RRC connection, the transmitter configures the BWP corresponding to the beam SSB. to the terminal device.

During data transmission, the sender sends SSB/SIB on BWP0, and sends data to the terminal device on the allocated BWP (BWP2).

After the terminal equipment (UE) accesses the beam where the coverage is located, if the bandwidth supported by the terminal is large, it needs to monitor and measure the SSB of BWP0 for beam switching while measuring the BWP2 allocated to itself. If the bandwidth supported by the terminal is small, On the one hand, it is necessary to measure the BWP2 allocated to itself, and on the other hand, it is necessary to measure the SSB on the BWP0 for beam switching, so it is necessary to frequently switch between BWP2 and BWP0. The problem solved by the solution in this application is for terminal support. In the case of a small bandwidth, only the reference signal CSI-RS needs to be measured on BWP2 to complete beam switching, and there is no need to frequently switch to BWP0 to measure the SSB signal.

The beam management in the existing NR system is on the same frequency, and each BWP can correspond to all the beams. When the beam is switched, the downlink control signaling can directly indicate the new beam information and the new beam when scheduling data. BWP information. However, the uplink and downlink BWP handovers are separately indicated, that is, downlink control signaling is used to instruct the uplink BWP handover and the downlink BWP handover respectively, so that the BWPs after the terminal handover are not necessarily on the same BWP.

FIG. 1 is a schematic diagram of a cell with multi-beam frequency reuse. Each cell represents a beam; F0, F1, F2 represent different BWPs. Regarding inter-frequency deployment, if in the scenario of inter-frequency deployment, each BWP only corresponds to part of the beam, the first problem is that when the beam needs to be switched, the signals of all beams cannot be measured on the allocated BWP (such as the aforementioned BWP2). Quality; the second problem is that the terminal equipment cannot directly obtain the handover target BWP information and the handover target beam information.

The first problem can be solved by configuring each BWP with CSI-RS corresponding to all beams for beam management; since the prior art can only obtain the information of all switched beams on the BWP0, the solution of the present application can allow the terminal to The switching information of all beams is obtained on the allocated BWP. As described above, if the bandwidth supported by the terminal is small, the information of all beams only needs to be obtained on the allocated BWP2, because all the beams are configured and transmitted on all BWPs. CSI-RS.

The second problem requires the introduction of new downlink control signaling to indicate the target BWP for handover and the beam after the beam is switched.

The downlink control signaling of existing NR BWP handover is together with data scheduling. When a heterogeneous network is deployed, dedicated BWP handover signaling for beam switching needs to be introduced, because it is used to schedule downlink data for receiving downlink data and sending uplink data. The control channel must be received on the target BWP on the target BWP after the handover.

This patent designs new downlink control signaling to avoid frequent BWP switching, and can directly switch to the new beam corresponding to the new BWP on the allocated BWP (eg, the aforementioned BWP2) for data transmission.

FIG. 2 is a flowchart of an embodiment of the method of the application.

An embodiment of the present application provides a beam switching indication method, which is used in a multi-beam (TCI state) and multi-BWP mobile communication cell, including the following steps:

Step 101: Corresponding multiple beams of a cell to multiple BWPs;

When the frequency reuse factor is greater than 1, the system bandwidth is divided into multiple BWPs, and each beam is sent on one BWP. One BWP is allocated to each beam, and each BWP is used for at least one beam.

For example, in Figure 1, there are 8 beams in the cell, but there are 3 BWPs, which are F0, F1, and F2. The number of beams is more than the number of BWPs, and each BWP is multiplexed by multiple cells.

Step 102, configure BWP through high-layer signaling;

For example, the terminal searches PSS and SSS for downlink synchronization, decodes broadcast MIB information, obtains the configuration of control resource set CORESET#0 (initial CORESET), and decodes SIB1 information on the indicated initial BWP. The terminal sends a random access request on the initial BWP according to the resources indicated by SIB1, the base station sends a random access response on CORESET#0, the terminal sends an RRC connection request on the initial uplink BWP, and the base station sends an RRC connection establishment on CORESET#0 for Configure UE-specific BWPs, up to 4 BWPs can be configured, and only one BWP can be activated. The dedicated BWP for the terminal and/or the beam corresponding to each BWP is configured through RRC signaling.

Step 103, the uplink control signaling includes a beam switching request, including the identifier of at least one candidate beam;

By configuring each BWP with CSI-RS corresponding to all beams for beam management, the terminal equipment can measure the signal quality of all beams and determine candidate beams.

As described in the background, terminals are assigned to BWP2. Since the beam where the BWP2 is located is only a part of the beam, the solution of the present invention needs to configure the CSI-RS of all the beams to realize the measurement of the quality of all the beams at the BWP2.

All beams here refer to all beams in a cell; or all pre-designated beams in a cell. All the beams include beams using different BWPs.

That is, in each BWP, the reference signals of downlink channel state information of multiple beams are configured, and the multiple beams include beams using different BWPs; preferably, the multiple beams include all beams in the cell.

Therefore, the terminal can determine a candidate beam through measurement on any of the allocated BWPs, and submit a beam switching request through uplink control signaling.

Step 104: The downlink control information includes the BWP identifier and the beam identifier after beam switching.

The downlink control signaling is used to notify the terminal equipment of the uplink and downlink carrier BWP identifiers after beam switching, and the downlink beam identifier after switching; the uplink BWP and the downlink BWP are the same.

In step 104, new downlink control signaling is introduced to indicate the switched target BWP and the beam after beam switching.

In the scenario described in this application, for example, the TCIstate ID (ie, beam ID) corresponding to the BWP ID may be added to the BWP public signaling; the terminal-specific TCI state ID may also be added to the BWP dedicated signaling. In other words, for the design of the new downlink control signaling, it may be terminal-specific signaling, or terminal group common signaling.

Preferably, the downlink control signaling includes N command units of m bits; each command unit includes at least one BWP identifier and at least one beam identifier; the m bits can be used to identify the largest number of BWPs The value and the maximum value of the number of beams are not less than the total number of BWPs and the total number of beams of the cell; the N command units correspond to one terminal device respectively. For example, N=floor(L_format/m), where L_format represents the payload size of the downlink control signaling; n=1, . . . , N, representing the BWP and/or beam to be switched by the nth user.

For example, the terminal index is configured through high-layer signaling, and the terminal index corresponds to the command unit of the downlink control signaling. One command unit is composed of m bits, and there are N command units in total, which are used to identify the configured terminal. For example, when the terminal index of UE2 is 13, the command unit of the 13th index of the downlink control signaling is configured for UE2.

If it is the terminal group public signaling, the RNTI of beam switching can also be introduced, and the downlink control channel is scrambled with the newly designed RNTI; the downlink control signaling is used to notify a group of terminals of the BWP ID where the beam is switched. , notify a group of terminals of the TCI state ID where the beam is switched.

Alternatively, the downlink control signaling only includes at least one BWP identifier and at least one beam identifier after handover dedicated to one terminal device.

It should be noted that the BWP switching of the existing NR system is independent of uplink and downlink. The downlink indicates the BWP of the scheduled data through the BWP indicator of DCI format 1_1, and the uplink indicates the scheduled data through the BWP indicator of DCI format 0_1. Therefore, the BWP of the uplink and the downlink are not necessarily the same BWP, so the newly designed downlink control signaling should perform switching instructions for the uplink and downlink BWPs at the same time.

It should also be noted that the existing downlink control signaling of NR BWP handover is together with data scheduling, and when a heterogeneous network is deployed, dedicated BWP handover signaling for beam switching needs to be introduced, because it is used to schedule and receive downlink data. And the downlink control channel for sending uplink data must be received on the target BWP on the target BWP after the handover.

FIG. 3 is a flowchart of an embodiment in which the method of the present application is applied to a network device.

Embodiments in which the method described in this application is applied to a network device may include the following steps:

Step 201: The network device sends high-layer signaling at the initial BWP indicated by the initial CORESET, which is used to configure at least one BWP dedicated to the terminal device and the downlink beam corresponding to each BWP, and activate the first BWP; the first BWP; BWP corresponds to the first beam;

Step 202, the network device receives a beam switching request at the first BWP, including the identifier of at least one candidate beam;

Step 203, the network device sends the downlink control signaling on the first BWP and the first beam, and the command unit corresponding to the terminal device includes the identifier of the second BWP and the identifier of the second beam;

Step 204, the network device receives the confirmation information;

Preferably, the confirmation information is received at the first BWP, because the downlink control new forest is sent at the first BWP.

Step 205: The network device switches to the second BWP and the second beam for receiving downlink control information and downlink data.

Preferably, the network device switches to the second BWP within a set period of time after receiving the confirmation information. For example, after the downlink handover control information is sent, if the base station receives the confirmation message ACK sent by the user terminal, the base station switches to the target BWP in x time slots after receiving the ACK.

FIG. 4 is a flowchart of an embodiment in which the method of the present application is applied to a terminal device.

An embodiment in which the method described in this application is applied to a terminal device may include the following steps:

Step 301: The terminal device receives information used to indicate the location of random access resources at the initial BWP indicated by the initial CORESET, sends a random access request and or a connection request, receives high-level signaling, and obtains the first information dedicated to the terminal device. The identification of the BWP and the identification of the first beam;

For example, the terminal searches for PSS and SSS for downlink synchronization, decodes broadcast MIB information for obtaining the configuration of CORSET#0, and decodes SIB1 information on the indicated initial BWP. The terminal sends a random access request on the initial BWP according to the resources indicated by SIB1, the base station sends a random access response on CORSET#0, the terminal sends an RRC connection request on the initial uplink BWP, and the base station sends an RRC connection establishment on CORSET#0 for Configure terminal-specific BWPs, up to 4 BWPs can be configured, and only one BWP can be activated. In the scenario, the downlink beam corresponding to each BWP is also configured.

Step 302, the terminal device performs data reception at the first BWP and the first beam, and when the detected information satisfies the beam switching condition, sends a beam switching request at the first BWP, including the identifier of at least one candidate beam;

For example, the terminal performs CSI-RS measurement on the received signal and decides whether to switch. Here, the detected information satisfies the beam switching condition, for example, the measured RSRP is less than the switching threshold

Step 303: The terminal device acquires a physical downlink control channel, the physical downlink control channel is used to instruct the terminal beam switching target beam (second beam), and the switching target BWP (second BWP), both uplink and downlink are switched to the a target BWP, the target beam is a downlink beam;

The terminal device receives the downlink control signaling at the first BWP and the first beam, and identifies the identifier of the second BWP and the identifier of the second beam corresponding to the terminal device;

The network device (base station) sends the newly designed downlink control signaling to the terminal, indicating that the terminal needs to switch to the second BWP and the new downlink second beam for data reception, and the terminal receives data on the second beam of the second BWP Downlink control information, send uplink data or receive downlink data.

The physical downlink signaling includes the indication of the BWP coefficient and/or the indication of the beam coefficient. If the maximum configurable BWP is M, the number of bits of the BWP coefficient is log ₂ M bits. If the maximum beam is N, then The number of bits of the beam coefficient is log ₂ N bits.

The downlink control signaling is the terminal-specific signaling mentioned above, or the common signaling.

Step 304, the terminal device sends confirmation information;

In this step, the transmission mode of the HARQ-ACK information of the physical downlink control channel is determined, for example, the terminal sends the HARQ-ACK information of the physical downlink control channel on the first BWP, which is used for the downlink control signaling to avoid the inconsistency of understanding of downlink control signaling between the base station and the terminal, for example, the terminal has not yet received the downlink control signaling, which will cause the radio link to fail, or the terminal to decode the wrong downlink control information. Data reception is performed on the BWP and/or the wrong beam, resulting in data reception failure.

Preferably, the PUCCH fed back by the uplink HARQ is implicitly corresponding to the resources of the downlink control signaling, that is, the PUCCH resources fed back by the uplink HARQ and the resources fed back by the downlink control signaling have a binding relationship.

Preferably, the confirmation information is sent at the first BWP.

Step 305: The terminal device switches to the second BWP and the second beam for receiving downlink control information and downlink data.

The key point of this embodiment is that the terminal device acquires the physical downlink control channel, and the physical downlink control channel is used to indicate the target beam of the terminal beam failure recovery and the target BWP to be switched. Both uplink and downlink are switched to the target BWP, and the The target beam is the downlink beam. Determine the transmission mode of the HARQ-ACK information of the physical downlink control channel, preferably, the PUCCH fed back by the uplink HARQ is implicitly corresponding to the resources of the downlink control signaling, that is, the PUCCH resources fed back by the uplink HARQ and the feedback The resources of the downlink control signaling have a binding relationship.

FIG. 5 is a schematic diagram of an embodiment of a network device.

The embodiment of the present application further proposes a network device, using the method of any one of the embodiments of the present application, the network device is configured to: send high-layer signaling at the initial BWP indicated by the initial CORESET, for configuring a specific At least one BWP of the terminal and a downlink beam corresponding to each BWP, and activate the first BWP; the first BWP corresponds to the first beam.

Further, the network device is further configured to: receive a beam switching request at the first BWP, including an identifier of at least one candidate beam;

Send the downlink control signaling on the first BWP and the first beam, and include the identifier of the second BWP and the identifier of the second beam in the command unit corresponding to the terminal device; receive confirmation information; switch to the The second BWP and the second beam are used for sending downlink control information and downlink data.

To implement the above technical solutions, a network device 400 proposed in this application includes a network sending module 401 , a network determining module 402 , and a network receiving module 403 .

The network sending module is configured to send the downlink control signaling, CORESET, higher layer signaling (RRC), SSB (including PSS and SSS), SIB and MIB.

The network determination module, for determining downlink control signaling information, includes N command units of m bits; each command unit includes at least one BWP identifier and at least one beam identifier; the m bits can be used for The maximum number of BWPs and the maximum number of beams identified in the identification are not less than the total number of BWPs and the total number of beams of the cell; the N command units correspond to one terminal device respectively.

The network receiving module is further configured to receive uplink control signaling or high-layer signaling (eg semi-static configuration signaling RRC); further, the network receiving module is further configured to receive uplink data. Further, the network receiving module is further configured to receive a PRACH access request and/or an RRC connection establishment request.

The specific methods for realizing the functions of the network sending module, the network determining module, and the network receiving module are as described in the method embodiments shown in FIGS. 1 to 4 of the present application, and will not be repeated here.

FIG. 6 is a schematic diagram of an embodiment of a terminal device.

The present application also proposes a terminal device, using the method of any one of the embodiments of the present application, the terminal device is configured to receive information indicating the location of random access resources at the initial BWP indicated by the initial CORESET, and send random access Request and/or connection request, receive high-layer signaling, and obtain the identifier of the first BWP and the identifier of the first beam dedicated to the terminal device.

Further, the terminal device is further configured to: perform data reception at the first BWP and the first beam, and when the detected information satisfies the beam switching condition, send a beam switching request at the first BWP, including at least The identifier of a candidate beam.

Further, the terminal device is further configured to: receive the downlink control signaling at the first BWP and the first beam, identify the identifier of the second BWP and the identifier of the second beam corresponding to the terminal device; send an acknowledgement information; switch to the second BWP and the second beam for receiving downlink control information and downlink data.

To implement the above technical solutions, a terminal device 500 proposed in this application includes a terminal sending module 501 , a terminal determining module 502 , and a terminal receiving module 503 .

The terminal receiving module is used for receiving the high layer signaling or downlink control signaling, and also for receiving CORESET, SSB (including PSS and SSS), SIB, MIB, etc. from network equipment;

The terminal determining module is configured to determine the identifier of the first BWP and/or the first beam according to the high layer signaling, and is further configured to determine the identifier of the second BWP and/or the second beam according to the downlink control signaling.

The terminal sending module is configured to send the random access request and the RRC connection request. The terminal sending module is further configured to send uplink control information (including HARQ-ACK) and send uplink data.

The specific methods for realizing the functions of the terminal sending module, the terminal determining module, and the terminal receiving module are described in the method embodiments shown in Figs.

The terminal device mentioned in this application may refer to a mobile terminal device.

FIG. 7 shows a schematic structural diagram of a network device according to another embodiment of the present invention. As shown in FIG. 7 , the network device 600 includes a processor 601 , a wireless interface 602 , and a memory 603 . Among other things, the wireless interface may be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices over a transmission medium. The wireless interface realizes the communication function with the terminal equipment, and processes wireless signals through the receiving and transmitting device, and the data carried by the signals communicates with the memory or the processor via an internal bus structure. The memory 603 contains a computer program for executing any one of the embodiments of FIGS. 1 to 3 of the present application, and the computer program is executed or changed on the processor 601 . When the memory, the processor, and the wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus and a status signal bus, which will not be repeated here.

FIG. 8 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 shown in FIG. 8 includes at least one processor 701 , memory 702 , user interface 703 and at least one network interface 704 . The various components in the terminal device 700 are coupled together by a bus system. The bus system is used to realize the connection communication between these components. The bus system includes data bus, power bus, control bus and status signal bus.

User interface 703 may include a display, keyboard, or pointing device, such as a mouse, trackball, touch pad or touch screen, and the like.

Memory 702 stores executable modules or data structures. An operating system and application programs may be stored in the memory. Among them, the operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. Applications include various applications, such as media players, browsers, etc., for implementing various application services.

In this embodiment of the present invention, the memory 702 includes a computer program for executing any one of the embodiments in FIGS. 1 to 3 of the present application, and the computer program is executed or changed on the processor 701 .

The memory 702 includes a computer-readable storage medium, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 701, each step of the method embodiment described in any one of the foregoing embodiments in FIG. 1 to 4 is implemented.

The processor 701 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the method of the present application may be completed by an integrated logic circuit of hardware in the processor 701 or an instruction in the form of software. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present invention may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. In a typical configuration, the apparatus of the present application includes one or more processors (CPUs), an input/output user interface, a network interface, and memory.

Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

Therefore, the present application further provides a computer-readable medium, where a computer program is stored on the computer-readable medium, and when the computer program is executed by a processor, the steps of the method described in any one of the embodiments of the present application are implemented. For example, the memory 603, 702 of the present invention may comprise non-persistent memory in a computer readable medium, in the form of random access memory (RAM) and/or non-volatile memory, such as read only memory (ROM) or flash memory ( flash RAM).

Computer-readable media includes both persistent and non-permanent, removable and non-removable media, and storage of information may be implemented by any method or technology. Information may be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory or other memory technology, Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, excludes transitory computer-readable media, such as modulated data signals and carrier waves.

Based on the embodiments of FIGS. 5 to 8 , the present application further proposes a mobile communication system, including at least one embodiment of any terminal device in the present application and at least one embodiment of any network device in the present application.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

It should also be noted that the "first" and "second" in this application are used to distinguish multiple objects with the same name, and have no other special meaning unless specifically stated.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (20)

1. A beam switching indication method for use in a multi-beam, multi-BWP mobile communication cell, comprising the steps of:

allocating one BWP per beam, one BWP for each beam at least;

the downlink control signaling is used for notifying the terminal device of BWP (uplink/downlink carrier wave protocol) identifiers after beam switching and BWP identifiers of downlink beams after switching;

the upstream BWP and the downstream BWP are the same.

2. The method of claim 1, wherein reference signals for downlink channel state information of a plurality of beams including beams using different BWPs are configured at each BWP.

3. The method of claim 1,

the downlink control signaling comprises N command units with m bits;

each command unit comprises at least 1 BWP mark and at least 1 beam mark;

the maximum value of the number of BWPs and the maximum value of the number of beams which can be used for identification by the m bits are not less than the total number of BWPs and the total number of beams of the cell;

the N command units respectively correspond to one terminal device.

4. The method of claim 1,

the downlink control signaling only contains at least 1 BWP identification and at least 1 beam identification after being switched, which are specially used for one terminal device.

5. The method according to any of claims 1 to 4, for a mobile terminal,

receiving information used for indicating the position of random access resources at an initial BWP indicated by an initial CORESET, sending a random access request and/or a connection request, receiving high-layer signaling, and obtaining the identification of a first BWP special for the terminal equipment and the identification of a first beam.

6. The method of claim 5,

and receiving data on the first BWP and the first beam, and when the detected information meets the beam switching condition, sending a beam switching request on the first BWP, wherein the beam switching request comprises the identifier of at least one candidate beam.

7. The method of claim 6,

receiving the downlink control signaling at a first BWP and a first beam, and identifying a second BWP identifier and a second beam identifier corresponding to the terminal device;

sending confirmation information;

and switching to the second BWP and the second beam for receiving downlink control information and downlink data.

8. The method according to any of claims 1 to 4, for a network device,

sending a high-level signaling at an initial BWP indicated by an initial CORESET, wherein the high-level signaling is used for configuring at least one BWP special for the terminal equipment and a downlink beam corresponding to each BWP and activating a first BWP; the first BWP corresponds to a first beam.

9. The method of claim 8,

receiving a beam switch request at the first BWP containing an identification of at least one candidate beam;

the downlink control signaling is sent by the first BWP and the first beam, and a command unit corresponding to the terminal device comprises an identifier of a second BWP and an identifier of a second beam;

receiving confirmation information;

and switching to the second BWP and the second beam for sending downlink control information and downlink data.

10. The method of claim 7 or 9,

the acknowledgement information is transmitted or received at the first BWP.

11. The method of claim 9,

and switching to the second BWP for the set duration after receiving the confirmation information.

12. A network device, the method of any one of claims 1 to 4, wherein the network device is configured to perform

Sending a high-level signaling at an initial BWP indicated by an initial CORESET, wherein the high-level signaling is used for configuring at least one BWP special for the terminal and a downlink beam corresponding to each BWP and activating a first BWP; the first BWP corresponds to a first beam.

13. The network device of claim 12,

receiving a beam switch request at the first BWP containing an identification of at least one candidate beam;

the downlink control signaling is sent by the first BWP and the first beam, and a command unit corresponding to the terminal device comprises an identifier of a second BWP and an identifier of a second beam;

receiving confirmation information;

and switching to the second BWP and the second beam for sending downlink control information and downlink data.

14. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the method according to any one of claims 1 to 4, 8 to 11.

15. A terminal device, the method as claimed in any one of claims 1 to 4, wherein the terminal device is used for

Receiving information used for indicating the position of random access resources at an initial BWP indicated by an initial CORESET, sending a random access request and/or a connection request, receiving high-layer signaling, and obtaining the identification of a first BWP special for the terminal equipment and the identification of a first beam.

16. The terminal device of claim 15,

and receiving data on the first BWP and the first beam, and when the detected information meets the beam switching condition, sending a beam switching request on the first BWP, wherein the beam switching request comprises the identifier of at least one candidate beam.

17. The terminal device of claim 15,

receiving the downlink control signaling at a first BWP and a first beam, and identifying a second BWP identifier and a second beam identifier corresponding to the terminal device;

sending confirmation information;

and switching to the second BWP and the second beam for receiving downlink control information and downlink data.

18. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to any one of claims 1 to 7.

19. A mobile communication system comprising at least one network device according to any of claims 12 to 14 and at least one terminal device according to any of claims 15 to 18.

20. A computer-readable medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 11.

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