Method for cooperative communication of multiple transmission reception points (TRPS), and related device

Abstract

The present application relates to the technical field of communications, and discloses a method for cooperative communication of multiple transmission reception points (TRPs), and a related device. The method is applied to a serving TRP, and comprises: transmitting a plurality of candidate calibration weight groups to a cooperative TRP; transmitting to a target terminal a first channel state information reference signal corresponding to the plurality of candidate calibration weight groups; on the basis of RSRP resource indication information which is fed back by the target terminal on the basis of the first channel state information reference signal, determining a target calibration weight group among the plurality of candidate calibration weight groups; and transmitting the target calibration weight group to the cooperative TRP, such that the cooperative TRP calibrates a second antenna of the cooperative TRP on the basis of the target calibration weight group.

Description

Multi-transmitting and receiving point TRP collaborative communication method and related equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 7, 2023, with application number 202311682564.3 and invention name “Method and related equipment for collaborative communication of multiple transmitting and receiving points TRP”. The entire contents of the Chinese patent application are incorporated herein by reference. Technical Field

[0003] The embodiments of the present application relate to the field of communication technology, and in particular to a method and related equipment for collaborative communication of multiple sending and receiving points (TRPs). Background Art

[0004] Cellular mobile communication systems are usually centered around base stations, and each base station only serves its own users. As a result, users at the cell edge are subject to interference from multiple neighboring cells, resulting in poor system performance and user perception.

[0005] Currently, the main technology to solve edge user perception is Coordinated Multiple Points (CoMP) technology. In CoMP technology, a single Transmission Reception Point (TRP) no longer provides services for the target terminal. Instead, multiple TRPs jointly provide services for the same target terminal with the target terminal as the center. For example, multiple TRPs send the same data stream to the same target terminal to improve the reliability of data transmission.

[0006] Summary of the Invention

[0007] In the first aspect, an embodiment of the present application provides a method for collaborative communication of multiple transmitting and receiving points TRP, which is applied to the service TRP, including: sending multiple candidate calibration weight groups to the collaborative TRP, so that the collaborative TRP cooperates with the service TRP to send the first channel state information reference signals corresponding to the multiple candidate calibration weight groups to the target terminal; sending the first channel state information reference signals corresponding to the multiple candidate weight groups to the target terminal; determining the target calibration weight group among the multiple candidate calibration weight groups according to the RSRP resource indication information fed back by the target terminal based on the first channel state information reference signal; sending the target calibration weight group to the collaborative TRP, so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group.

[0008] In the second aspect, an embodiment of the present application provides a method for collaborative communication of multiple transmitting and receiving points TRP, which is applied to collaborative TRP, including: receiving multiple candidate calibration weight groups sent by a service TRP; sending a first channel state information reference signal corresponding to multiple candidate calibration weight groups to a target terminal; receiving a target candidate calibration weight group from the multiple candidate calibration weight groups sent by the service TRP; wherein the target candidate calibration weight group is determined by the service TRP according to the RSRP resource indication information fed back by the target terminal; and calibrating the second antenna of the collaborative TRP according to the target candidate calibration weight group.

[0009] In the third aspect, an embodiment of the present application provides a method for collaborative communication of multiple transmitting and receiving points TRP, which is applied to a target terminal, including: receiving multiple groups of first channel state information reference signals sent by a service TRP and a collaborative TRP; wherein each group of the first channel state information reference signals corresponds to a candidate calibration weight group, and the candidate calibration weight group is any one of a plurality of candidate calibration weight groups; measuring the RSRP of the resources corresponding to the multiple groups of first channel state information reference signals, and determining the RSRP resource indication information corresponding to the target RSRP among the multiple RSRPs; sending the RSRP resource indication information to the service TRP, so that the service TRP determines the target calibration weight group among the multiple candidate calibration weight groups based on the RSRP resource indication information.

[0010] In the fourth aspect, an embodiment of the present application provides a TRP device, including: a first sending module, used to send multiple candidate calibration weight groups to a collaborative TRP, so that the collaborative TRP cooperates with the service TRP to send the first channel state information reference signals corresponding to the multiple candidate calibration weight groups to the target terminal; a second sending module, used to send the first channel state information reference signals corresponding to the multiple candidate weight groups to the target terminal; a determination module, used to determine the target calibration weight group among the multiple candidate calibration weight groups based on the RSRP resource indication information fed back by the target terminal based on the first channel state information reference signal; a third sending module, used to send the target calibration weight group to the collaborative TRP, so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group.

[0011] In the fifth aspect, an embodiment of the present application provides a TRP device, including: a first transceiver module, used to receive multiple candidate calibration weight groups sent by a service TRP; sending a first channel state information reference signal corresponding to multiple candidate calibration weight groups to a target terminal; receiving a target candidate calibration weight group among the multiple candidate calibration weight groups sent by the service TRP; wherein the target candidate calibration weight group is determined by the service TRP based on the RSRP resource indication information fed back by the target terminal; a calibration module, used to calibrate the second antenna of the collaborative TRP according to the target candidate calibration weight group.

[0012] In the sixth aspect, an embodiment of the present application provides a terminal, including: a second transceiver module, used to receive multiple groups of first channel state information reference signals sent by a service TRP and a collaborative TRP; wherein each group of the first channel state information reference signals corresponds to a candidate calibration weight group, and the candidate calibration weight group is any one of a plurality of candidate calibration weight groups; sending the RSRP resource indication information to the service TRP, so that the service TRP determines the target calibration weight group among the plurality of candidate calibration weight groups based on the RSRP resource indication information; a measurement module, used to measure the RSRP of the resources corresponding to the multiple groups of first channel state information reference signals, and determine the RSRP resource indication information corresponding to the target RSRP among the plurality of RSRPs.

[0013] In the seventh aspect, an embodiment of the present application provides an electronic device, comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the method described in the first aspect, the second aspect, or the third aspect above are implemented.

[0014] In an eighth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect, the second aspect, or the third aspect are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0016] FIG1 is a schematic diagram showing a flow chart of a method for coordinated communication of multiple transmission and reception points (TRPs) provided in an embodiment of the present application;

[0017] FIG2 shows a schematic diagram of a scenario of multi-TRP cooperative communication provided by an embodiment of the present application;

[0018] FIG3 shows a schematic diagram of calibration of the second antenna of the cooperative TRP provided in an embodiment of the present application;

[0019] FIG4 shows a schematic diagram of coherent shaped emission provided in an embodiment of the present application;

[0020] FIG5 is a flow chart showing another method for coordinated communication of multiple transmission and reception points (TRPs) provided in an embodiment of the present application;

[0021] FIG6 shows a flowchart of another method for coordinated communication of multiple transmission and reception points (TRPs) provided in an embodiment of the present application;

[0022] FIG7 shows a schematic structural diagram of a TRP device provided in an embodiment of the present application;

[0023] FIG8 shows a schematic structural diagram of another TRP device provided in an embodiment of the present application;

[0024] FIG9 shows a schematic structural diagram of a terminal provided in an embodiment of the present application;

[0025] FIG10 shows a schematic structural diagram of a multi-transmitting and receiving point TRP cooperative communication system provided in an embodiment of the present application;

[0026] FIG11 shows a schematic structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0028] In wireless communications, Coordinated Multiple Points (CoMP) technology can be used to improve the service quality of users at the cell edge and increase the cell edge throughput by jointly scheduling interactive measurements and data information between adjacent cells. In CoMP technology, multiple TRPs (such as a serving TRP and a coordinating TRP) jointly provide services for the same target terminal. The TRP corresponding to the serving cell where the target terminal is located is called the serving TRP, and the TRP that provides services to the target terminal in addition to the serving TRP is called the coordinating TRP. When the target terminal is at the cell edge, the serving TRP and the coordinating TRP respectively send downlink data to the target terminal to improve the signal quality of the target terminal at the cell edge.

[0029] However, the distances between different TRPs and the target terminal vary, and there is a time delay or phase deviation in the signals transmitted by the service TRP and the collaborative TRP, resulting in unsatisfactory performance gain of multi-TRP collaborative communication.

[0030] In response to the problems existing in the above-mentioned multi-transmitting and receiving point TRP collaborative communication process, an embodiment of the present application provides a method for multi-transmitting and receiving point TRP collaborative communication, in which the service TRP and the collaborative TRP jointly send a first channel state information reference signal to the target terminal, and the service TRP selects a target calibration weight group that better matches the downlink channel quality of the target terminal from multiple candidate calibration weight groups based on the RSRP resource indication information fed back by the target terminal, and then the collaborative TRP calibrates the second antenna according to the target calibration weight group to reduce the impact of the time delay or phase deviation of the signals transmitted by the collaborative TRP and the service TRP on the downlink channel quality of the target terminal, thereby improving the performance gain effect of multi-TRP collaborative communication.

[0031] Please refer to Figure 1, which shows a flow chart of a method for coordinated communication of multiple transmission and reception points (TRPs) provided by an embodiment of the present application. The method 100 is applied to a service TRP and may include the following steps:

[0032] S101: Send multiple candidate calibration weight groups to the collaborative TRP, so that the collaborative TRP cooperates with the serving TRP to send first channel state information reference signals corresponding to the multiple candidate calibration weight groups to the target terminal.

[0033] S102: Sending first channel state information reference signals corresponding to the plurality of candidate weight groups to the target terminal.

[0034] S103: Determine a target calibration weight group among the plurality of candidate calibration weight groups according to the RSRP resource indication information fed back by the target terminal based on the first channel state information reference signal.

[0035] S104: Send the target calibration weight group to the collaborative TRP, so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group.

[0036] In the embodiment of the present application, the serving TRP and the cooperating TRP may be distributed in the base station of the same cell, in the same base station of different cells, or in different base stations of different cells. In the above S101, the manner in which the serving TRP sends multiple candidate calibration weight groups to the cooperating TRP may include the following situations:

[0037] In one possible scenario, when the serving TRP and the cooperating TRP belong to the same cell, multiple candidate calibration weight groups can be sent over the air interface between the serving TRP and the cooperating TRP.

[0038] In one possible scenario, when the serving TRP belongs to cell 1, the collaborative TRP belongs to cell 2, and cell 1 and cell 2 belong to the same base station, the serving TRP and the collaborative TRP can send multiple candidate calibration weight groups through the interface between cell 1 and cell 2 (for example, the Xn interface).

[0039] In another possible scenario, when the service TRP belongs to cell 1, the collaborative TRP belongs to cell 2, and cell 1 belongs to base station 1 and cell 2 belongs to base station 2, the service TRP and the collaborative TRP can send multiple candidate calibration weight groups through the interface between base station 1 and base station 2.

[0040] Taking the example of service TRP and collaboration distributed in different base stations in different cells, as shown in Figure 2, the service TRP is distributed in base station A of the service cell, and the collaboration TRP can be distributed in base station B of neighboring cell 1, base station C of neighboring cell 2, and base station D of neighboring cell 3. The service TRP and collaboration TRP can send multiple candidate calibration weight groups through the interface between base stations.

[0041] In one possible implementation, the base station A of the serving cell can select a collaborative cell based on the A3 measurement report reported by the target terminal. Specifically, the base station A of the serving cell obtains the A3 measurement report sent by the target terminal, which includes the configuration information of multiple neighboring cells corresponding to the serving cell and the reference signal receiving power (RSRP) of each neighboring cell; based on the A3 measurement report, a neighboring cell whose configuration information and RSRP strength meet the preset conditions is selected from multiple neighboring cells as a collaborative cell, and the TRP corresponding to the collaborative cell is the collaborative TRP. The preset condition can be that the neighboring cell with the same configuration information as the serving cell and the RSRP strength exceeds the preset strength threshold is selected as a collaborative cell, and the preset condition can also be that the neighboring cell with the same configuration information as the serving cell and the RSRP strength among multiple neighboring cells is the largest is selected as a collaborative cell. Here, the configuration information can be information such as transceiver mode, frequency, bandwidth, time slot resources, etc.

[0042] Furthermore, after determining the collaborative TRP, the serving TRP sends multiple candidate calibration weight groups to the collaborative TRP, so that the collaborative TRP cooperates with the serving TRP to send first channel state information reference signals (CSI-RS) corresponding to the multiple candidate calibration weight groups to the target terminal; the serving TRP sends the first CSI-RS corresponding to the multiple candidate calibration weight groups to the target terminal. In this way, the serving TRP and the collaborative TRP respectively send the first CSI-RS corresponding to the multiple candidate calibration weight groups to the same target terminal.

[0043] The target terminal receives multiple groups of first CSI-RS sent by the service TRP and the collaborative TRP, measures the RSRP of the resources corresponding to the multiple groups of first CSI-RS, obtains the RSRP resource indication information corresponding to the target RSRP among the multiple RSRPs, and sends the RSRP resource indication information to the service TRP.

[0044] The serving TRP determines a target calibration weight group from among multiple candidate calibration weight groups based on the RSRP resource indication information fed back by the target terminal based on the first CSI-RS; the target calibration weight group is the candidate calibration weight group indicated by the RSRP resource indication information. Furthermore, the serving TRP sends the target calibration weight group to the cooperating TRP, so that the cooperating TRP calibrates the second antenna of the cooperating TRP based on the target calibration weight group.

[0045] In this way, the service TRP can obtain a target calibration weight group that better matches the downlink channel quality of the target terminal from multiple candidate calibration weight groups, and then the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group, which can reduce the impact of the time delay or phase deviation of the signals transmitted by the collaborative TRP and the service TRP on the downlink channel quality of the target terminal, and improve the performance gain effect of multi-TRP collaborative communication.

[0046] In a possible implementation, before sending the plurality of candidate calibration weight groups to the collaborative TRP in step S101, the process further includes:

[0047] The first CSI-RS resource configuration information and first CSI feedback configuration information for RSRP (such as layer 1 reference signal received power L1-RSRP) reporting that match the target terminal capabilities are sent to the target terminal, where the first CSI-RS resource configuration information is used to instruct the target terminal to receive CSI-RS resources, and the first CSI feedback configuration information is used to instruct the target terminal to measure the received CSI-RS resources and then feedback RSRP resource indication information.

[0048] In this way, when the service TRP and the collaborative TRP send the first CSI-RS to the target terminal, the target terminal can measure the RSRP of the resources corresponding to the first CSI-RS and feedback RSRP resource indication information to the service TRP.

[0049] Among them, the multiple candidate calibration weight groups include a target calibration weight group, which is used to calibrate the time delay or phase deviation of the signals transmitted by the service TRP and the collaborative TRP. In specific applications, the time delay or phase deviation of the transmission signal can be converted into the phase difference of the corresponding downlink data in the frequency domain. In one possible implementation, the above-mentioned candidate calibration weight group includes a second calibration weight.

[0050] The second calibration weight is the calibration weight corresponding to the second antenna of the collaborative TRP; wherein, the second calibration weight is determined based on the first calibration weight corresponding to the first antenna of the service TRP and the target phase difference, and the target phase difference is the phase difference of the second antenna relative to the first antenna.

[0051] In the embodiment of the present application, the service TRP first designs a candidate calibration weight group of T sets of single ports, where T is a positive integer and the value can be selected according to actual needs. In each candidate calibration weight group, the first calibration weight corresponding to the first antenna of the service TRP can be set to an initial value, where the initial value defaults to 1. Then, based on the initial value and the target phase difference, the second calibration weight corresponding to the second antenna of the collaborative TRP is determined, where the target phase difference is the phase difference of the second antenna relative to the first antenna. The candidate calibration weight group can be expressed as Where x = 0 to T-1. The candidate calibration weight is used to shape the first antenna of the service TRP and the second antenna of the collaborative TRP, and the first CSI-RS corresponding to the candidate calibration weight group is sent to the target terminal. The target terminal feeds back RSRP resource indication information cri-RSRP based on the channel measurement, where cri corresponds to the target calibration weight group That is, the phase of the second antenna of the current collaborative TRP relative to the first antenna of the service TRP.

[0052] It should be noted that, in specific applications, there may be multiple first antennas of the service TRP and the second antenna of the collaborative TRP. Assuming that both the service TRP and the collaborative TRP have M antennas, it is necessary to poll all antennas of the service TRP and the collaborative TRP to obtain the aligned phases, that is, to obtain the corresponding target calibration weight group for each antenna of the collaborative TRP. The target calibration weight group can be expressed as:

[0053] For example, as shown in Figure 3, taking the single-cell 4-antenna scenario as an example, the first first antenna of the service TRP and the first second antenna of the collaborative TRP send the first CSI-RS corresponding to T sets of candidate calibration weight groups to the target terminal, and determine the alignment phase of the first second antenna of the collaborative TRP based on the cri-RSRP fed back by the target terminal; the second first antenna of the service TRP and the second second antenna of the collaborative TRP send the first CSI-RS corresponding to T sets of candidate calibration weight groups to the target terminal, and determine the alignment phase of the second second antenna of the collaborative TRP based on the cri-RSRP fed back by the target terminal. This process is repeated, all antennas are polled, and the alignment phase of all second antennas of the collaborative TRP is obtained.

[0054] Furthermore, the first calibration weight corresponding to each first antenna of the serving TRP is 1, and the second calibration weight corresponding to each second antenna of the cooperating TRP is: The service TRP may send the second calibration weight corresponding to the collaborative TRP in the target calibration weight to the collaborative TRP, so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the second calibration weight.

[0055] In a possible implementation, after sending the target calibration weight group to the collaborative TRP in step S104 so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group, the method further includes:

[0056] S105: Send a second channel state information reference signal corresponding to the target calibration weight group to the target terminal.

[0057] S106: Receive a precoding matrix indicator fed back by the target terminal based on the second channel state information reference signal.

[0058] S107: Precoding the service channel data to be transmitted according to the target calibration weight group and the precoding matrix indicator.

[0059] In an embodiment of the present application, after the service TRP sends the target calibration weight group to the collaborative TRP, the service TRP and the collaborative TRP respectively compensate the target calibration weight group to the resources corresponding to the CSI-RS, obtain the second CSI-RS corresponding to the target calibration weight group, and send the second CSI-RS to the target terminal.

[0060] In specific applications, the second CSI-RS sent by the service TRP and the collaborative TRP are at the same time-frequency position and use the same port and scrambling sequence to ensure the consistency of other parameters of the two groups of second CSI-RS except the target calibration weight group.

[0061] The target terminal measures the resources corresponding to the second CSI-RS and reports the optimal cri-RI-PMI-CQI to the serving TRP, where the cri-RI-PMI-CQI includes a precoding matrix indicator (PMI), which is the coherent shaping weight between cells.

[0062] The service TRP multiplies the target calibration weight group and the precoding matrix indicator PMI to obtain the beamforming weight, performs weighted processing on the service channel data to be transmitted according to the beamforming weight, and sends the weighted service channel data to the target terminal to improve the effectiveness of data transmission.

[0063] In a possible implementation, before the step S105 of sending the second channel state information reference signal corresponding to the target calibration weight group to the target terminal, the method further includes:

[0064] Second CSI-RS resource configuration information and second CSI feedback configuration information for PMI reporting that match the target terminal capabilities are sent to the target terminal, wherein the second CSI-RS resource configuration information is used to instruct the target terminal to receive CSI-RS resources, and the second CSI feedback configuration information is used to instruct the target terminal to measure the received CSI-RS resources and then feed back a precoding matrix indicator PMI.

[0065] In this way, when the service TRP and the collaborative TRP respectively send the second CSI-RS to the target terminal, the target terminal can receive the second CSI-RS, measure the resources corresponding to the second CSI-RS, and then feedback the precoding matrix indicator.

[0066] In a possible implementation, after precoding the traffic channel data to be transmitted according to the target calibration weight group and the precoding matrix indicator in step S107, the method further includes:

[0067] The precoding matrix indicator and the service channel data are sent to the collaborative TRP so that the collaborative TRP precodes the service channel data according to the target calibration weight group and the precoding matrix indicator.

[0068] In an embodiment of the present application, as shown in Figure 4, taking the base station B in which the collaborative TRP is distributed in the neighboring cell 1 as an example, the base station A sends the target calibration weight group, the precoding matrix indicator PMI and the TB data of the service channel PDSCH to be transmitted to the base station B, and the collaborative TRP corresponding to the base station B multiplies the target calibration weight group and the PMI to obtain the beamforming weight; the service channel data to be transmitted is weighted according to the beamforming weight, and the weighted service channel data is sent to the target terminal, which can improve the spectrum efficiency and perception rate of edge users.

[0069] Please refer to Figure 5, which shows a flow chart of another method for cooperative communication of multiple transmission and reception points (TRPs) provided in an embodiment of the present application. The method 500 is applied to cooperative TRPs and may include the following steps:

[0070] S501: Receive multiple candidate calibration weight groups sent by the service TRP.

[0071] S502: Send first channel state information reference signals corresponding to the plurality of candidate calibration weight groups to a target terminal.

[0072] S503: Receive a target candidate calibration weight group from a plurality of candidate calibration weight groups sent by the service TRP; wherein the target candidate calibration weight group is determined by the service TRP according to the RSRP resource indication information fed back by the target terminal.

[0073] S504: Calibrate the second antenna of the collaborative TRP according to the target candidate calibration weight group.

[0074] In the embodiment of the present application, the collaborative TRP first receives multiple candidate calibration weight groups sent by the service TRP. The candidate calibration weight groups can be expressed as Wherein, x=0 to T-1. Then, multiple candidate calibration weight groups are used to shape the second antenna, and the coordinated service TRP sends a first channel state information reference signal CSI-RS corresponding to each candidate calibration weight group to the target terminal.

[0075] The target terminal receives multiple groups of first CSI-RS sent by the service TRP and the collaborative TRP, measures the RSRP of the resources corresponding to the multiple groups of first CSI-RS, obtains the RSRP resource indication information corresponding to the target RSRP among the multiple RSRPs, and sends the RSRP resource indication information to the service TRP.

[0076] The collaborative TRP receives a target candidate calibration weight group from a plurality of candidate calibration weight groups sent by the service TRP; and calibrates the second antenna of the collaborative TRP according to the target candidate calibration weight group.

[0077] In a possible implementation, after calibrating the second antenna of the collaborative TRP according to the target candidate calibration weight group in step S504, the method further includes:

[0078] S505: Send a second channel state information reference signal corresponding to the target calibration weight group to the target terminal.

[0079] S506: Receive the precoding matrix indicator and service channel data sent by the service TRP; wherein, the precoding matrix indicator is fed back by the target terminal in response to the received second channel state information reference signal.

[0080] S507: Precode the traffic channel data according to the target calibration weight group and the precoding matrix indicator.

[0081] In an embodiment of the present application, the collaborative TRP compensates the target calibration weight group to the resources corresponding to the CSI-RS, obtains a second CSI-RS corresponding to the target calibration weight group, and sends the second CSI-RS to the target terminal.

[0082] The target terminal measures the resources corresponding to the second CSI-RS and reports the optimal cri-RI-PMI-CQI to the serving TRP, where the cri-RI-PMI-CQI includes a precoding matrix indicator (PMI), which is the coherent shaping weight between cells.

[0083] The collaborative TRP receives the precoding matrix indicator and service channel data sent by the serving TRP and precodes the service channel data according to the target calibration weight group and the precoding matrix indicator. Specifically, the collaborative TRP can multiply the target calibration weight group and the precoding matrix indicator PMI to obtain beamforming weights, perform weighted processing on the service channel data to be transmitted according to the beamforming weights, and send the weighted service channel data to the target terminal to improve the effectiveness of data transmission.

[0084] In a possible implementation, in step S505, sending the second channel state information reference signal corresponding to the target calibration weight group to the target terminal includes:

[0085] The second antenna of the collaborative TRP is shaped according to the target calibration weight group, and the second channel state information reference signal is sent to the target terminal through the shaped second antenna.

[0086] In an embodiment of the present application, the collaborative TRP can shape the second antenna according to the target calibration weight group, and send the second CSI-RS to the target terminal through the shaped second antenna, so that the target terminal measures the resources corresponding to the second CSI-RS according to the service TRP and the second CSI-RS sent by the collaborative TRP, and then feeds back the coherent shaping weight PMI between cells.

[0087] In this way, the service TRP can obtain a target calibration weight group that better matches the downlink channel quality of the target terminal from multiple candidate calibration weight groups. The collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group sent by the service TRP, which can reduce the impact of the time delay or phase deviation of the signals transmitted by the collaborative TRP and the service TRP on the downlink channel quality of the target terminal, and improve the performance gain effect of multi-TRP collaborative communication.

[0088] Please refer to Figure 6, which shows a flowchart of another method for coordinated communication of multiple transmission and reception points (TRPs) provided in an embodiment of the present application. The method 600 is applied to a target terminal and may include the following steps:

[0089] S601: Receive multiple groups of first channel state information reference signals sent by the service TRP and the collaborative TRP; wherein, each group of the first channel state information reference signals corresponds to a candidate calibration weight group, and the candidate calibration weight group is any one of multiple candidate calibration weight groups.

[0090] S602: Measure the RSRP of the resources corresponding to the multiple groups of first channel state information reference signals, and determine the RSRP resource indication information corresponding to the target RSRP among the multiple RSRPs; send the RSRP resource indication information to the service TRP, so that the service TRP determines the target calibration weight group among the multiple candidate calibration weight groups according to the RSRP resource indication information.

[0091] In an embodiment of the present application, the target terminal receives multiple groups of first CSI-RSs sent by the serving TRP and the collaborative TRP; measures the RSRP of the resources corresponding to the multiple groups of first CSI-RSs, determines the RSRP resource indication information corresponding to the target RSRP among the multiple RSRPs; and sends the RSRP resource indication information to the serving TRP. Here, the target terminal can determine the first CSI-RS with the strongest RSRP among the resources corresponding to the multiple groups of first CSI-RSs through measurement, and feedback the RSRP resource indication information corresponding to the first CSI-RS with the strongest RSRP to the collaborative TRP.

[0092] In a possible implementation, before the step S601 of receiving multiple groups of first channel state information reference signals sent by the serving TRP and the collaborative TRP, the method further includes:

[0093] Receive the first CSI-RS resource configuration information and first CSI feedback configuration information for RSRP (such as layer 1 reference signal received power L1-RSRP) reporting sent by the service TRP, wherein the first CSI-RS resource configuration information is used to instruct the target terminal to receive CSI-RS resources, and the first CSI feedback configuration information is used to instruct the target terminal to measure the received CSI-RS resources and then feedback RSRP resource indication information. When the target terminal receives the first CSI-RS sent by the service TRP and the collaborative TRP, it measures the RSRP of the resources corresponding to the first CSI-RS and feeds back the RSRP resource indication information to the service TRP.

[0094] In this way, the target calibration weight group for calibrating the second antenna of the collaborative TRP is selected from multiple candidate calibration weight groups through the RSRP resource indication information fed back by the target terminal, without the need to calibrate the second antenna of the collaborative TRP through hardware equipment, which can reduce hardware costs. In addition, the service TRP can obtain a target calibration weight group that better matches the downlink channel quality of the target terminal from multiple candidate calibration weight groups, and then calibrate the second antenna of the collaborative TRP according to the target calibration weight group, which can reduce the impact of the time delay or phase deviation of the signals transmitted by the collaborative TRP and the service TRP on the downlink channel quality of the target terminal, and improve the performance gain effect of multi-TRP collaborative communication.

[0095] In a possible implementation, the method 600 further includes:

[0096] Receive the second channel state information reference signal sent by the service TRP and the collaborative TRP; measure the resources corresponding to the second channel state information reference signal to determine the precoding matrix indicator; send the precoding matrix indicator to the service TRP, so that the service TRP precodes the service channel data to be transmitted according to the precoding matrix indicator.

[0097] In an embodiment of the present application, the target terminal measures the resources corresponding to the second CSI-RS and reports the optimal cri-RI-PMI-CQI to the service TRP, wherein the cri-RI-PMI-CQI includes a precoding matrix indicator (Precoding Matrix Index, PMI), and the PMI is the coherent shaping weight between cells.

[0098] In a possible implementation, before the above-mentioned receiving the second channel state information reference signal sent by the serving TRP and the coordinated TRP, the method further includes:

[0099] Receive the second CSI-RS resource configuration information and second CSI feedback configuration information for PMI reporting sent by the service TRP, wherein the second CSI-RS resource configuration information is used to instruct the target terminal to receive CSI-RS resources, and the second CSI feedback configuration information is used to instruct the target terminal to measure the received CSI-RS resources and then feed back the precoding matrix indicator PMI. This enables the target terminal to feed back the precoding matrix indicator PMI after receiving the second CSI-RS sent by the service TRP and the collaborative TRP and measuring the resources corresponding to the second CSI-RS.

[0100] Please refer to Figure 7, which shows a schematic diagram of the structure of a TRP device provided in an embodiment of the present application. The TRP device 700 can implement all or part of the content of the embodiment shown in Figure 1. The TRP device 700 includes:

[0101] The first sending module 710 is used to send multiple candidate calibration weight groups to the collaborative TRP, so that the collaborative TRP cooperates with the serving TRP to send the first channel state information reference signal corresponding to the multiple candidate calibration weight groups to the target terminal.

[0102] The second sending module 720 is configured to send first channel state information reference signals corresponding to the multiple candidate weight groups to the target terminal.

[0103] The determination module 730 is configured to determine a target calibration weight group among the plurality of candidate calibration weight groups according to the RSRP resource indication information fed back by the target terminal based on the first channel state information reference signal.

[0104] The third sending module 740 is used to send the target calibration weight group to the collaborative TRP, so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group.

[0105] The candidate calibration weight group includes the second calibration weight.

[0106] The second calibration weight is the calibration weight corresponding to the second antenna of the collaborative TRP; wherein, the second calibration weight is determined based on the first calibration weight corresponding to the first antenna of the service TRP and the target phase difference, and the target phase difference is the phase difference of the second antenna relative to the first antenna.

[0107] In a possible implementation, the TRP device 700 further includes:

[0108] A fifth sending module is configured to send a second channel state information reference signal corresponding to the target calibration weight group to the target terminal.

[0109] A receiving module is configured to receive a precoding matrix indicator fed back by the target terminal based on the second channel state information reference signal.

[0110] The first precoding module is configured to precode the service channel data to be transmitted according to the target calibration weight group and the precoding matrix indicator.

[0111] In a possible implementation, the TRP device 700 further includes:

[0112] The sixth sending module is used to send the precoding matrix indicator and the service channel data to the collaborative TRP, so that the collaborative TRP precodes the service channel data according to the target calibration weight group and the precoding matrix indicator.

[0113] Please refer to FIG8 , which shows a schematic diagram of the structure of another TRP device provided in an embodiment of the present application. The TRP device 700 can implement all or part of the content of the embodiment shown in FIG5 . The TRP device 800 includes:

[0114] The first transceiver module 810 is used to receive multiple candidate calibration weight groups sent by the service TRP; send first channel state information reference signals corresponding to the multiple candidate calibration weight groups to the target terminal; receive a target candidate calibration weight group from the multiple candidate calibration weight groups sent by the service TRP; wherein the target candidate calibration weight group is determined by the service TRP based on the RSRP resource indication information fed back by the target terminal.

[0115] The calibration module 820 is configured to calibrate the second antenna of the collaborative TRP according to the target candidate calibration weight group.

[0116] In a possible implementation, the TRP device 800 further includes:

[0117] The third transceiver module is used to send a second channel state information reference signal corresponding to the target calibration weight group to the target terminal; receive the precoding matrix indicator and service channel data sent by the service TRP; wherein the precoding matrix indicator is fed back by the target terminal in response to the received second channel state information reference signal.

[0118] The second precoding module is configured to precode the service channel data according to the target calibration weight group and the precoding matrix indicator.

[0119] The third transceiver module, when used to send the second channel state information reference signal corresponding to the target calibration weight group to the target terminal, is specifically used to:

[0120] The second antenna of the collaborative TRP is shaped according to the multiple candidate calibration weight groups, and the second channel state information reference signal is sent to the target terminal through the shaped second antenna.

[0121] Please refer to FIG9 , which shows a schematic diagram of the structure of a terminal provided in an embodiment of the present application. The terminal 900 can implement all or part of the content of the embodiment shown in FIG6 . The terminal 900 includes:

[0122] A second transceiver module 910 is configured to receive multiple groups of first channel state information reference signals sent by a serving TRP and a cooperating TRP; wherein each group of the first channel state information reference signals corresponds to a candidate calibration weight group, and the candidate calibration weight group is any one of the multiple candidate calibration weight groups;

[0123] Sending the RSRP resource indication information to the serving TRP, so that the serving TRP determines a target calibration weight group among the multiple candidate calibration weight groups according to the RSRP resource indication information;

[0124] The measurement module 920 is configured to measure RSRPs of resources corresponding to the multiple groups of first channel state information reference signals, and determine RSRP resource indication information corresponding to a target RSRP among the multiple RSRPs.

[0125] Please refer to Figure 10, which shows a structural diagram of a multi-transmitting and receiving point TRP cooperative communication system provided by an embodiment of the present application. The multi-transmitting and receiving point TRP cooperative communication system includes a base station and a user terminal; wherein the base station is distributed with a service TRP corresponding to the service cell and a cooperative TRP corresponding to the cooperative cell, which is used to send CSI-RS resource configuration and CSI feedback configuration for L1-RSRP reporting and PMI reporting to the terminal; receive channel measurement feedback cri-RSRP and cri-RI-PMI-CQI from the terminal, and obtain the target calibration weight group between cells, and perform coherent shaping transmission on the service channel data; the terminal is used to measure CSI-RS and feed back the measured CSI to the base station.

[0126] Among them, the base station includes a resource allocation module, a third transceiver module, a decision module and a collaboration module; the resource allocation module is used to allocate CSI-RS resources for L1-RSRP reporting and PMI reporting to the terminal; the third transceiver module is used to transmit CSI signals, downlink service channel data and receive channel measurement feedback cri-RSRP and cri-RI-PMI-CQI from the terminal; the decision module is used to obtain the target calibration weight group between cells based on the cri-RSRP reported by the terminal; the collaboration module is used to coherently shape the service channel based on the cri-RI-PMI-CQI reported by the terminal and the target calibration weight group.

[0127] The user terminal includes a fourth transceiver module and a second measurement module; the fourth transceiver module is used to receive the CSI-RS measurement and CSI feedback configuration and downlink service channel data sent by the base station, and transmit the channel measurement cri-RSRP and cri-RI-PMI-CQI to the base station; the second measurement module is used to measure the downlink channel quality.

[0128] In this way, the base station can obtain a target calibration weight group that better matches the downlink channel quality of the target terminal, and then calibrate the second antenna of the collaborative TRP according to the target calibration weight group. This can reduce the impact of the delay or phase deviation of the signals transmitted by the collaborative TRP and the service TRP on the downlink channel quality of the target terminal, and improve the performance gain effect of multi-TRP collaborative communication.

[0129] FIG11 shows a schematic diagram of the hardware structure of an electronic device that implements an embodiment of the present application. Referring to the figure, at the hardware level, the electronic device includes a processor, and optionally, an internal bus, a network interface, and a memory. Among them, the memory may include a memory, such as a high-speed random access memory (RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk storage. Of course, the electronic device may also include hardware required for other services.

[0130] The processor, network interface, and memory can be interconnected via an internal bus, such as an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. These buses can be classified as address buses, data buses, and control buses. For ease of illustration, the figure uses only one bidirectional arrow, but this does not imply that there is only one bus or only one type of bus.

[0131] The memory stores programs. Specifically, the programs may include program code, which includes computer operating instructions. The memory may include internal memory and non-volatile memory, and provides instructions and data to the processor.

[0132] The processor reads the corresponding computer program from the non-volatile memory into the internal memory and then runs it, forming a device for locating the target user at a logical level. The processor executes the program stored in the memory and specifically performs the method disclosed in the embodiment shown in Figure 1, Figure 5, or Figure 6, and realizes the functions and beneficial effects of each method described in the method embodiments above, which will not be repeated here.

[0133] The methods disclosed in the embodiments shown in FIG. 1 , FIG. 5 , or FIG. 6 of the present application can be implemented in a processor or by a processor. The processor may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the method can be performed by hardware integrated logic circuits in the processor or by software instructions. The processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly implemented as a hardware decoding processor, or can be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium well-known in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and, in conjunction with its hardware, completes the steps of the above method.

[0134] The computer device can also execute the methods described in the above method embodiments and realize the functions and beneficial effects of the methods described in the above method embodiments, which will not be repeated here.

[0135] Of course, in addition to software implementation, the electronic device of this application does not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc. That is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0136] An embodiment of the present application also proposes a computer-readable storage medium, which stores one or more programs. When the one or more programs are executed by an electronic device including multiple applications, the electronic device executes the method disclosed in the embodiment shown in Figure 1 or Figure 5 or Figure 6 and realizes the functions and beneficial effects of the various methods described in the previous method embodiments, which will not be repeated here.

[0137] The computer-readable storage medium includes a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0138] Furthermore, an embodiment of the present application also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the following process is implemented: the method disclosed in the embodiment shown in Figure 1 or Figure 5 or Figure 6 and the functions and beneficial effects of the various methods described in the previous method embodiments are implemented, which will not be repeated here.

[0139] The embodiments of the present application can be applied to various electronic device collaboration or interconnection scenarios, including: collaboration and interconnection between mobile phones and laptops / tablets; collaboration and interconnection between mobile terminals and smart TVs / displays; collaboration and interconnection between mobile phones or tablets and in-car entertainment systems; collaboration and interconnection between mobile terminals and smart conference systems, etc., thereby meeting the diverse needs of users in scenarios such as smart homes, smart offices, and smart travel.

[0140] In short, the above description is only a preferred embodiment of the present application and does not limit the scope of protection of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0141] The systems, devices, modules, or units described in the above embodiments may be implemented by computer chips or entities, or by products having certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0142] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules, 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 cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media such as modulated data signals and carrier waves.

[0143] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0144] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

Claims

1. A method for cooperative communication of multiple transmission and reception points TRP, applied to service TRP, wherein: include: Sending multiple candidate calibration weight groups to a cooperative TRP, so that the cooperative TRP cooperates with the serving TRP to send first channel state information reference signals corresponding to the multiple candidate calibration weight groups to the target terminal; Sending a first channel state information reference signal corresponding to the plurality of candidate weight groups to the target terminal; Determine a target calibration weight group among the plurality of candidate calibration weight groups according to RSRP resource indication information fed back by the target terminal based on the first channel state information reference signal; The target calibration weight group is sent to the collaborative TRP so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group.

2. The method according to claim 1, wherein: The set of candidate calibration weights includes a second calibration weight; The second calibration weight is the calibration weight corresponding to the second antenna of the collaborative TRP; wherein the second calibration weight is determined based on the first calibration weight corresponding to the first antenna of the service TRP and the target phase difference, and the target phase difference is the phase difference of the second antenna relative to the first antenna.

3. The method according to claim 1, wherein: Also includes: Sending a second channel state information reference signal corresponding to the target calibration weight group to the target terminal; receiving a precoding matrix indicator fed back by the target terminal based on the second channel state information reference signal; The service channel data to be transmitted is precoded according to the target calibration weight group and the precoding matrix indicator.

4. The method according to claim 3, wherein: Also includes: The precoding matrix indicator and the service channel data are sent to the collaborative TRP so that the collaborative TRP precodes the service channel data according to the target calibration weight group and the precoding matrix indicator.

5. A method for cooperative communication of multiple transmission and reception points TRP, applied to cooperative TRP, wherein: include: receiving a plurality of candidate calibration weight groups sent by a service TRP; Sending first channel state information reference signals corresponding to a plurality of the candidate calibration weight groups to a target terminal; Receive a target candidate calibration weight group from among multiple candidate calibration weight groups sent by the service TRP; wherein the target candidate calibration weight group is obtained by the service TRP based on the feedback of the target terminal RSRP resource indication information is determined; The second antenna of the collaborative TRP is calibrated according to the target candidate calibration weight group.

6. The method according to claim 5, wherein: Also includes: Sending a second channel state information reference signal corresponding to the target calibration weight group to the target terminal; Receiving a precoding matrix indicator and traffic channel data sent by the service TRP; wherein the precoding matrix indicator is fed back by the target terminal to the received second channel state information reference signal; The traffic channel data is precoded according to the target calibration weight group and the precoding matrix indicator.

7. The method according to claim 6, wherein: The sending a second channel state information reference signal corresponding to the target calibration weight group to the target terminal includes: The second antenna of the collaborative TRP is shaped according to the target calibration weight group, and the second channel state information reference signal is sent to the target terminal through the shaped second antenna.

8. A method for cooperative communication of multiple transmission and reception points (TRPs), applied to a target terminal, wherein: include: Receiving multiple groups of first channel state information reference signals sent by a serving TRP and a collaborative TRP; wherein each group of the first channel state information reference signals corresponds to a candidate calibration weight group, and the candidate calibration weight group is any one of a plurality of candidate calibration weight groups; Measure the RSRP of the resources corresponding to the multiple groups of first channel state information reference signals, and determine the RSRP resource indication information corresponding to the target RSRP among the multiple RSRPs; send the RSRP resource indication information to the service TRP, so that the service TRP determines the target calibration weight group among the multiple candidate calibration weight groups according to the RSRP resource indication information.

9. The method according to claim 8, wherein: Also includes: Receiving a second channel state information reference signal sent by the serving TRP and the collaborative TRP; Measuring resources corresponding to the second channel state information reference signal to determine a precoding matrix indicator; The precoding matrix indicator is sent to the service TRP, so that the service TRP precodes the service channel data to be transmitted according to the precoding matrix indicator.

10. A TRP device, wherein: include: A first sending module, configured to send a plurality of candidate calibration weight groups to a collaborative TRP, so that the collaborative TRP cooperates with the serving TRP to send a first channel state information reference signal corresponding to the plurality of candidate calibration weight groups to a target terminal; A second sending module, configured to send a first channel state information reference signal corresponding to the plurality of candidate weight groups to the target terminal; A determination module, configured to determine a target calibration weight group among the plurality of candidate calibration weight groups according to RSRP resource indication information fed back by the target terminal based on the first channel state information reference signal; The third sending module is used to send the target calibration weight group to the collaborative TRP, so that the collaborative TRP calibrates the second antenna of the collaborative TRP according to the target calibration weight group.

11. A TRP device, wherein: include: A first transceiver module, configured to receive a plurality of candidate calibration weight groups sent by a service TRP; Sending first channel state information reference signals corresponding to a plurality of the candidate calibration weight groups to a target terminal; Receiving a target candidate calibration weight group among a plurality of candidate calibration weight groups sent by the serving TRP; wherein the target candidate calibration weight group is determined by the serving TRP according to RSRP resource indication information fed back by the target terminal; A calibration module is used to calibrate the second antenna of the collaborative TRP according to the target candidate calibration weight group.

12. A terminal, wherein: include: A second transceiver module is used to receive multiple groups of first channel state information reference signals sent by the service TRP and the collaborative TRP; wherein each group of the first channel state information reference signals corresponds to a candidate calibration weight group, and the candidate calibration weight group is any one of the multiple candidate calibration weight groups; Sending the RSRP resource indication information to the serving TRP, so that the serving TRP determines a target calibration weight group among the multiple candidate calibration weight groups according to the RSRP resource indication information; The measurement module is used to measure the RSRP of the resources corresponding to the multiple groups of first channel state information reference signals, and determine the RSRP resource indication information corresponding to the target RSRP among the multiple RSRPs.

13. An electronic device, wherein: The electronic device includes a processor and a memory, the memory storing a program or instruction that can be run on the processor, and the program or instruction, when executed by the processor, implements the steps of the method for multi-transmitting and receiving point TRP cooperative communication as described in any one of claims 1 to 4, or implements the steps of the method for multi-transmitting and receiving point TRP cooperative communication as described in any one of claims 5 to 7, or implements the steps of the method for multi-transmitting and receiving point TRP cooperative communication as described in any one of claims 8 to 9.

14. A readable storage medium, wherein: The readable storage medium stores programs or instructions, which, when executed by the processor, implement the steps of the method for multi-transmitting and receiving point TRP cooperative communication as described in any one of claims 1 to 4, or implement the steps of the method for multi-transmitting and receiving point TRP cooperative communication as described in any one of claims 5 to 7, or implement the steps of the method for multi-transmitting and receiving point TRP cooperative communication as described in any one of claims 8 to 9.

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