CN117676717A

CN117676717A - Method and device for indicating cooperative transmission receiving points

Info

Publication number: CN117676717A
Application number: CN202210970554.9A
Authority: CN
Inventors: 张笛笛; 王潇涵; 李婷; 金黄平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-08-12
Filing date: 2022-08-12
Publication date: 2024-03-08
Also published as: WO2024032202A1

Abstract

The application provides a method and a device for indicating a receiving point of cooperative transmission, which can reduce the expenditure of terminal equipment for feeding back TRP participating in the cooperative transmission to network equipment. The method comprises the following steps: the terminal equipment acquires the first information, determines Y cooperative TRPs according to the first information and the second information, and sends third information to the network equipment. The first information is used for indicating M reference signal resources or M antenna port groups, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRPs, the M antenna port groups are in one-to-one correspondence with M TRPs, and the M TRPs are cooperative TRPs. The second information indicates that the total number of TRPs supporting cooperative transmission is L, Y cooperative TRPs are included in L-M TRPs, and L-M TRPs are TRPs other than M TRPs among the L TRPs. The third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, and the Y antenna port groups are in one-to-one correspondence with the Y cooperative TRPs.

Description

Method and device for indicating cooperative transmission receiving points

Technical Field

The present disclosure relates to the field of communications, and in particular, to a method and an apparatus for indicating a cooperative transmission receiving point.

Background

In order to improve throughput performance of the system and multi-cell edge user experience, a cooperative transmission manner is generally adopted to serve terminal devices under the same coverage of multiple cells. For example, multiple transmission and reception points (transmission and reception point, TRP) may serve the terminal device using coherent joint transmission (coherent joint transmission, CJT). The current standard specifies the maximum number of TRPs that are served by a terminal device in a coherent joint transmission mode, the terminal device determines the TRPs that actually participate in the cooperative transmission, and feeds back the TRPs that participate in the cooperative transmission to the network device. The feedback overhead in this way is large. How to reduce the feedback overhead is a technical problem to be solved.

Disclosure of Invention

The application provides a method and a device for indicating a receiving point of cooperative transmission, which can reduce the expenditure of terminal equipment for feeding back TRP participating in the cooperative transmission to network equipment.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, a method for indicating a cooperative transmission receiving point is provided. The method comprises the following steps: the terminal equipment acquires the first information, determines Y cooperative TRPs according to the first information and the second information, and sends third information to the network equipment. The first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, and the M TRPs are cooperative TRPs. The second information indicates that the total number of TRPs supporting cooperative transmission is L, Y cooperative TRPs are included in L-M TRPs, and L-M TRPs are TRPs other than M TRPs among the L TRPs. The third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, and the Y antenna port groups are in one-to-one correspondence with the Y cooperative TRPs.

Based on the method provided in the first aspect, the terminal device acquires M reference signal resources or M TRPs corresponding to M antenna port groups and is certain to participate in the cooperative transmission, the terminal device further selects the TRP participating in the cooperative transmission from the remaining L-M TRPs, so that the range of the TRP participating in the cooperative transmission selected by the terminal device is reduced, and therefore, the terminal device reports Y TRPs of the remaining L-M TRPs to participate in the cooperative transmission, the cost of reporting the TRPs participating in the cooperative transmission by the terminal device can be reduced, and the complexity of processing by the terminal device can be reduced.

Wherein L is an integer greater than 1, M is an integer greater than or equal to 1 and less than L, and Y is an integer greater than or equal to 1 and less than L-M.

In one possible design, the determining, by the terminal device, Y cooperative TRPs according to the first information and the second information includes: the terminal equipment acquires fourth information, and the terminal equipment determines Y collaborative TRPs according to the first information, the second information and the fourth information. Wherein the fourth information is used to indicate that the total number of TRPs actually participating in the cooperative transmission is N, Y is equal to N-M, and N is an integer greater than 1 and less than or equal to L.

In this way, the protocol predefining or the network device determines that the M TRPs must participate in the cooperative transmission, the total number of TRPs actually participating in the cooperative transmission is N, the terminal device determines other N-M TRPs participating in the cooperative transmission, and finally, the N-M TRPs and the M TRPs perform the cooperative transmission simultaneously. The terminal equipment needs to report which N-M TRPs in the remaining L-M TRPs participate in the cooperative transmission, so that the cost of reporting the TRPs participating in the cooperative transmission by the terminal equipment is reduced, and the processing complexity of the terminal equipment can be reduced.

In one possible design, the third information may include a first field, where the first field is used to indicate Y cooperative TRPs corresponding to Y reference signal resources, or the first field is used to indicate Y cooperative TRPs corresponding to Y antenna port groups. In this way, the terminal device selects Y TRPs participating in the cooperative transmission from the L-M TRPs, and the terminal device reports the Y TRPs to participate in the cooperative transmission, so that the cost of the terminal device reporting the TRPs participating in the cooperative transmission is reduced, and the processing complexity of the terminal device can be reduced.

In one possible design, the first field may include a bit map or transmission hypothesis.

Alternatively, the first field may comprise a bit map, and the bit length of the first field may be related to the value of L-M, e.g., the bit number of the bit map may be equal to L-M.

In this way, the protocol predefining or the network device predefines that M TRPs are certain to participate in the cooperative transmission, which reduces the range of the terminal device selecting the TRPs participating in the cooperative transmission, the terminal device only needs to report which TRPs in the remaining L-M TRPs participate in the cooperative transmission, the terminal device only needs L-M bits to indicate the TRPs participating in the cooperative transmission, the cost of the terminal device reporting the TRPs participating in the cooperative transmission can be reduced, and the processing complexity of the terminal device can be reduced.

In one possible design, the third information may include a second field, where the second field is used to indicate M TRPs corresponding to the M reference signal resources and Y cooperative TRPs corresponding to the Y reference signal resources; or, the second field is used to indicate M TRPs corresponding to the M antenna port groups and Y cooperative TRPs corresponding to the Y antenna port groups.

In one possible design, the second field includes a transmission hypothesis. In this way, the terminal device can tell the network device the TRP involved in the cooperative transmission in the form of reporting the transmission hypothesis.

That is, the protocol predefines or the network device predefines that M TRPs must participate in the cooperative transmission, and when the terminal device reports other TRPs participating in the cooperative transmission, the terminal device may select one transmission hypothesis from the transmission hypotheses determined according to the M TRPs, thereby reducing the selectable range of the transmission hypothesis, so that the overhead of the terminal device reporting the TRPs participating in the cooperative transmission may be reduced, and the complexity of processing by the terminal device may be reduced.

In one possible design manner, the obtaining, by the terminal device, the first information may include: the terminal device receives first information from the network device. The M TRPs that must participate in the cooperative transmission may be determined by the network device.

In one possible design, the first information may be included in radio resource control (radio resource control, RRC) signaling, or medium access control (media access control, MAC) Control Element (CE) signaling, or downlink control information (downlink control information, DCI). Optionally, the first information may be included in a higher layer signaling, and the network device may inform the terminal device that M reference signal resources or M TRPs corresponding to M antenna port groups must participate in the cooperative transmission through the higher layer signaling.

In one possible design, the first information may be predefined for the protocol. In this application, protocol predefining may refer to protocol conventions, and the like.

In one possible design, the third information may be included in the uplink control information (uplink control information, UCI). For example, the network device may transmit the third information to the terminal device through the UCI, which may include the third information.

In one possible design, the second information is from the network device or predefined for the protocol.

In one possible design, the second information may be from the network device, and the second information may be included in RRC signaling, MAC CE signaling, or DCI. As such, the network device may transmit the second information to the terminal device through RRC signaling, MAC CE signaling, or DCI.

In one possible design, the fourth information may be from the network device, or the fourth information may be determined by the terminal device, or the fourth information may be predefined by a protocol, or the fourth information may be determined by negotiation between the network device and the terminal device.

Optionally, the terminal device acquires the fourth information, which may include that the terminal device receives the fourth information from the network device, and the fourth information may be included in RRC signaling, MAC CE signaling, or DCI. Alternatively, the fourth information may be included in higher layer signaling, and the network device may send the fourth information to the terminal device through the higher layer signaling.

In one possible design, L is equal to 4.

In one possible design, the different numbers of TRPs correspond to different values of β, which is the ratio of the non-zero projection coefficient selected for each layer to the maximum possible non-zero projection coefficient for each layer.

For example, when the number N of TRPs involved in cooperative transmission is 2 or less, the corresponding coefficient β ₁ The method comprises the steps of carrying out a first treatment on the surface of the When participating in the co-transmission of TRPWhen the number N is more than 2, the corresponding coefficient beta ₂ 。

In a second aspect, a method for indicating a cooperative transmission receiving point is provided. The method comprises the following steps: the network device sends the first information to the terminal device, and the network device receives the third information from the terminal device. The first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, and the M TRPs are cooperative TRPs. The third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, the Y antenna port groups are in one-to-one correspondence with Y cooperative TRPs, the Y cooperative TRPs are contained in L-M TRPs, the L-M TRPs are M TRPs except for M TRPs corresponding to the M reference signal resources or M TRPs corresponding to the M antenna port groups in the L TRPs, L is the total number of TRPs supporting cooperative transmission, L is an integer greater than 1, M is an integer greater than or equal to 1 and smaller than L, and Y is an integer greater than or equal to 1 and smaller than L-M.

In one possible design, Y is equal to N-M, where N is the total number of TRPs actually involved in cooperative transmission, and N is an integer greater than 1 and less than or equal to L.

In one possible design, the third information may include a first field, where the first field is used to indicate Y cooperative TRPs corresponding to Y reference signal resources, or the first field is used to indicate Y cooperative TRPs corresponding to Y antenna port groups.

In one possible design, the third information includes a second field, where the second field is used to indicate M TRPs corresponding to the M reference signal resources and Y cooperative TRPs corresponding to the Y reference signal resources; or, the second field is used to indicate M TRPs corresponding to the M antenna port groups and Y cooperative TRPs corresponding to the Y antenna port groups.

In one possible design, the second field includes a transmission hypothesis.

In one possible design, the method provided in the second aspect may further include: the network device determines the first information according to the fifth information. Wherein the fifth information may include one or more of: information of an uplink channel, reference signal receiving power and angle delay pair information. For example, the network device may make channel sounding reference signal (sounding reference signal, SRS) measurements to obtain information for the uplink channel.

In one possible design, the first information may be included in RRC signaling, MAC CE signaling, or DCI.

In one possible design, the third information may be included in the uplink control information UCI.

In one possible design, the method provided in the second aspect may further include: the network device sends the second information to the terminal device. Wherein the second information may be used to indicate that the total number of TRPs supporting cooperative transmission is L.

In one possible design, the second information may be included in RRC signaling, MAC CE signaling, or DCI.

In one possible design, the method provided in the second aspect may further include: the network device sends fourth information to the terminal device. Wherein the fourth information may be used to indicate that the total number of TRPs actually participating in the cooperative transmission is N.

In one possible design, the fourth information is included in RRC signaling, MAC CE signaling, or DCI.

In one possible design, L is equal to 4.

Alternatively, when the number N of TRPs involved in cooperative transmission is less than or equal to 2, the corresponding coefficient β ₁ The method comprises the steps of carrying out a first treatment on the surface of the When the number N of TRPs participating in cooperative transmission is more than 2, the corresponding coefficient beta ₂ 。

In addition, the technical effects of the method described in the second aspect may refer to the technical effects of the method described in the first aspect, which are not described herein.

In a third aspect, a method for indicating a cooperative transmission receiving point is provided. The method comprises the following steps: the terminal device receives the sixth information from the network device, and the terminal device sends the seventh information to the network device. The sixth information is used for indicating R reference signal resources or R antenna port groups, one of the R antenna port groups comprises one or more antenna ports, the R reference signal resources are in one-to-one correspondence with R transmission and reception points TRP, the R antenna port groups are in one-to-one correspondence with R TRPs, the R TRPs are candidate cooperative TRPs, the R is smaller than the L, and the L is the total number of the TRPs supporting cooperative transmission. The seventh information is determined according to the sixth information, the seventh information indicating Q reference signal resources or Q antenna port groups, Q being less than or equal to R, the Q reference signal resources being in one-to-one correspondence with Q cooperative TRPs, the Q antenna port groups being in one-to-one correspondence with Q cooperative TRPs, the Q cooperative TRPs being included in the R TRPs.

Based on the method provided in the third aspect, the network device determines in advance that R reference signal resources or R TRPs corresponding to R antenna port groups can participate in the cooperative transmission, R is smaller than L, L is the total number of TRPs supporting the cooperative transmission, the terminal device selects the TRPs participating in the cooperative transmission from the R TRPs, the range of the terminal device selecting the TRPs participating in the cooperative transmission is reduced, Q TRPs in the R TRPs corresponding to R antenna port groups are simultaneously involved in the cooperative transmission, the cost of the terminal device reporting the TRPs participating in the cooperative transmission can be reduced, and the processing complexity of the terminal device can be reduced.

In one possible design, the seventh information may include a third field, where the third field is used to indicate that Q cooperative TRPs corresponding to the Q reference signal resources participate in cooperative transmission, or the third field is used to indicate that Q cooperative TRPs corresponding to the Q antenna port groups participate in cooperative transmission. In this way, the terminal device selects Q TRPs participating in the cooperative transmission from the R TRPs, and the terminal device reports the Q TRPs participating in the cooperative transmission, thereby reducing the overhead of the terminal device reporting the TRPs participating in the cooperative transmission, and also reducing the complexity of processing by the terminal device.

In one possible design, the third field may comprise a bit map.

Alternatively, the bit length of the third field may be related to the value of R, e.g., the number of bits of the bit map may be equal to R.

In this way, the network device determines that R TRPs can participate in the cooperative transmission in advance, so as to reduce the range of the TRPs of the terminal device for selecting the TRPs participating in the cooperative transmission, the terminal device only needs to report which TRPs of the remaining R TRPs participate in the cooperative transmission, and the terminal device only needs R bits to indicate the TRPs participating in the cooperative transmission, so that the cost of reporting the TRPs participating in the cooperative transmission by the terminal device can be reduced, and the processing complexity of the terminal device can be reduced.

In one possible design, the third field includes a transmission hypothesis. In this way, the terminal device can tell the network device the TRP involved in the cooperative transmission in the form of reporting the transmission hypothesis.

That is, the protocol predefines or the network device predefines that R TRPs must participate in the cooperative transmission, when the terminal device reports the TRPs that participate in the cooperative transmission, the terminal device may select one transmission hypothesis from the transmission hypotheses determined according to the R TRPs, so as to reduce the selectable range of the transmission hypothesis, thereby reducing the overhead of the terminal device reporting the TRPs that participate in the cooperative transmission, and also reducing the complexity of the terminal device processing.

In one possible design, the sixth information may be included in RRC signaling, MAC CE signaling, or DCI. Optionally, the sixth information may be included in high-layer signaling, and the network device may inform the terminal device that R reference signal resources or R TRPs corresponding to R antenna port groups may participate in the cooperative transmission through the high-layer signaling.

In one possible design, the seventh information may be included in the uplink control information UCI.

In one possible design, R is an integer greater than or equal to 1.

In one possible design, L is equal to 4.

For example, when the number Q of TRPs involved in cooperative transmission is 2 or less, the corresponding coefficient β ₁ The method comprises the steps of carrying out a first treatment on the surface of the When the number Q of TRPs participating in cooperative transmission is more than 2, the corresponding coefficient beta ₂ 。

In a fourth aspect, a method for indicating a receiving point of cooperative transmission is provided. The method comprises the following steps: the network device sends the sixth information to the terminal device, and the network device receives the seventh information from the terminal device. The sixth information is used for indicating R reference signal resources or R antenna port groups, one of the R antenna port groups comprises one or more antenna ports, the R reference signal resources are in one-to-one correspondence with R transmission and reception points TRP, the R antenna port groups are in one-to-one correspondence with R TRPs, the R TRPs are candidate cooperative TRPs, the R is smaller than the L, and the L is the total number of the TRPs supporting cooperative transmission. The seventh information indicates Q reference signal resources, or Q antenna port groups, Q being less than or equal to R, the Q reference signal resources being in one-to-one correspondence with Q cooperative TRPs, the Q antenna port groups being in one-to-one correspondence with the Q cooperative TRPs, the Q cooperative TRPs being included in the R TRPs.

In one possible design, the seventh information may include a third field, where the third field is used to indicate that Q cooperative TRPs corresponding to the Q reference signal resources participate in cooperative transmission, or the third field is used to indicate that Q cooperative TRPs corresponding to the Q antenna port groups participate in cooperative transmission.

In one possible design, the third field may comprise a bit map.

In one possible design, the third field includes a transmission hypothesis.

In one possible design manner, the method provided in the fourth aspect may further include: the network device determines sixth information from the fifth information. Wherein the fifth information may include one or more of: information of an uplink channel, reference signal receiving power and angle delay pair information.

In one possible design, the sixth information may be included in RRC signaling, MAC CE signaling, or DCI.

In one possible design, R is an integer greater than or equal to 1.

In one possible design, L is equal to 4.

Further, the technical effects of the method described in the fourth aspect may refer to the technical effects of the method described in the first aspect, and are not described herein.

In a fifth aspect, a communication device is provided. The communication device includes: a processing module and a transmitting module. The processing module is used for acquiring the first information. The processing module is further used for determining Y cooperative TRPs according to the first information and the second information. And the sending module is used for sending the third information to the network equipment. The first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, and the M TRPs are cooperative TRPs. The second information indicates that the total number of TRPs supporting cooperative transmission is L, Y cooperative TRPs are included in L-M TRPs, L-M TRPs are TRPs other than M TRPs among the L TRPs, and L is an integer greater than 1. M is an integer greater than or equal to 1 and less than L. Y is an integer greater than or equal to 1 and less than L-M. The third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, and the Y antenna port groups are in one-to-one correspondence with the Y cooperative TRPs.

In one possible design, the processing module is further configured to obtain fourth information. The processing module is further used for determining Y collaborative TRPs according to the first information, the second information and the fourth information. The fourth information is used for indicating that the total number of TRPs actually serving the terminal device in the multi-station cooperation mode is N, Y is equal to N-M, and N is an integer greater than 1 and less than or equal to L.

In one possible design, the second field includes a transmission hypothesis.

In one possible design manner, the communication device of the fifth aspect may further include: and a receiving module. The receiving module is used for receiving the first information from the network equipment.

In one possible design, the first information may be predefined for the protocol.

In one possible design, the second information may be from the network device, and the second information may be included in RRC signaling, MAC CE signaling, or DCI.

In one possible design, the fourth information may be from the network device, or the fourth information may be determined by the communication apparatus, or the fourth information may be predefined by the protocol, or the fourth information may be determined by the network device and the communication apparatus in a negotiation.

In one possible design, the fourth information may be from the network device, and the fourth information may be included in RRC signaling, MAC CE signaling, or DCI.

In one possible design, L is equal to 4.

For example, when the number N of TRPs involved in cooperative transmission is 2 or less, the corresponding coefficient β ₁ The method comprises the steps of carrying out a first treatment on the surface of the When the number N of TRPs participating in cooperative transmission is more than 2, the corresponding coefficient beta ₂ 。

It should be noted that the receiving module and the transmitting module may be separately provided, or may be integrated into one module, i.e., the transceiver module. The specific implementation manner of the receiving module and the sending module is not specifically limited.

Optionally, the communication device according to the fifth aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communication device of the fifth aspect to perform the method of the first aspect.

The communication device according to the fifth aspect may be a terminal device, or may be a chip (system) or other parts or components that may be disposed in the terminal device, which is not limited in this application.

Further, the technical effects of the communication device according to the fifth aspect may refer to the technical effects of the method according to any one of the possible implementation manners of the first aspect, which are not described herein.

In a sixth aspect, a communication device is provided. The communication device includes: a transmitting module and a receiving module. The sending module is used for sending the first information to the terminal equipment. And the receiving module is used for receiving the third information from the terminal equipment. The first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, and the M TRPs are cooperative TRPs. The third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, the Y antenna port groups are in one-to-one correspondence with Y cooperative TRPs, the Y cooperative TRPs are contained in L-M TRPs, the L-M TRPs are M TRPs except for M TRPs corresponding to the M reference signal resources or M TRPs corresponding to the M antenna port groups in the L TRPs, L is the total number of TRPs supporting cooperative transmission, L is an integer greater than 1, M is an integer greater than or equal to 1 and smaller than L, and Y is an integer greater than or equal to 1 and smaller than L-M.

In one possible design, the third information may include a first field, where the third information includes a second field, and the first field is used to indicate M TRPs corresponding to the M reference signal resources and Y cooperative TRPs corresponding to the Y reference signal resources; or, the second field is used to indicate M TRPs corresponding to the M antenna port groups and Y cooperative TRPs corresponding to the Y antenna port groups.

In one possible design, the second field includes a transmission hypothesis.

In one possible design manner, the communication device provided in the sixth aspect may further include: and a processing module. The processing module is used for determining the first information according to the fifth information. Wherein the fifth information may include one or more of: information of an uplink channel, reference signal receiving power and angle delay pair information.

In one possible design, the first information may be included in radio resource control RRC signaling, MAC CE signaling, or downlink control information DCI.

In one possible embodiment, the transmitting module is further configured to transmit the second information to the terminal device. Wherein the second information may be used to indicate that the total number of TRPs supporting cooperative transmission is L.

In one possible embodiment, the transmitting module is further configured to transmit fourth information to the terminal device. Wherein the fourth information may be used to indicate that the total number of TRPs actually participating in the cooperative transmission is N.

In one possible design, L is greater than or equal to M and Y is less than or equal to L-M.

Optionally, N is greater than or equal to M.

Optionally, N is less than or equal to L.

In one possible design, L is equal to 4.

Optionally, the communication device according to the sixth aspect may further include a processing module and a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communications device of the sixth aspect to perform the method of the second aspect.

The communication device according to the sixth aspect may be a network device, or may be a chip (system) or other components or assemblies that may be provided in the network device, which is not limited in this application.

Further, the technical effects of the communication device according to the sixth aspect may refer to the technical effects of the method according to any one of the possible implementation manners of the second aspect, which are not described herein.

In a seventh aspect, a communication device is provided. The communication device includes: a transmitting module and a receiving module. And the receiving module is used for receiving the sixth information from the network equipment. And the sending module is used for sending the seventh information to the network equipment. The sixth information is used for indicating R reference signal resources or R antenna port groups, one of the R antenna port groups comprises one or more antenna ports, the R reference signal resources are in one-to-one correspondence with R transmission and reception points TRP, the R antenna port groups are in one-to-one correspondence with R TRPs, the R TRPs are candidate cooperative TRPs, the R is smaller than the L, and the L is the total number of the TRPs supporting cooperative transmission. The seventh information is determined according to the sixth information, the seventh information indicating Q reference signal resources or Q antenna port groups, Q being less than or equal to R, the Q reference signal resources being in one-to-one correspondence with Q cooperative TRPs, the Q antenna port groups being in one-to-one correspondence with Q cooperative TRPs, the Q cooperative TRPs being included in the R TRPs.

In one possible design, the third field may comprise a bit map.

In one possible design, the third field includes a transmission hypothesis.

In one possible design, R is an integer greater than or equal to 1.

In one possible design, L is equal to 4.

Optionally, the communication device according to the seventh aspect may further include a processing module and a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by the processing module, enable the communication device according to the seventh aspect to perform the method according to the third aspect.

The communication device according to the seventh aspect may be a terminal device, or may be a chip (system) or other components or assemblies that may be provided in the terminal device, which is not limited in this application.

Further, the technical effects of the communication device according to the seventh aspect may refer to the technical effects of the method according to any one of the possible implementation manners of the third aspect, which are not described herein.

In an eighth aspect, a communication device is provided. The communication device includes: a transmitting module and a receiving module. And the sending module is used for sending the sixth information to the terminal equipment. And the receiving module is used for receiving the seventh information from the terminal equipment. The sixth information is used for indicating R reference signal resources or R antenna port groups, one of the R antenna port groups comprises one or more antenna ports, the R reference signal resources are in one-to-one correspondence with R transmission and reception points TRP, the R antenna port groups are in one-to-one correspondence with R TRPs, the R TRPs are candidate cooperative TRPs, the R is smaller than the L, and the L is the total number of the TRPs supporting cooperative transmission. The seventh information indicates Q reference signal resources, or Q antenna port groups, Q being less than or equal to R, the Q reference signal resources being in one-to-one correspondence with Q cooperative TRPs, the Q antenna port groups being in one-to-one correspondence with the Q cooperative TRPs, the Q cooperative TRPs being included in the R TRPs.

In one possible design, the third field may comprise a bit map.

In one possible design, the third field includes a transmission hypothesis.

In one possible design manner, the communication device provided in the eighth aspect may further include: and a processing module. And the processing module is used for determining sixth information according to the fifth information. Wherein the fifth information may include one or more of: information of an uplink channel, reference signal receiving power and angle delay pair information.

In one possible design, R is an integer greater than or equal to 1.

In one possible design, L is equal to 4.

Optionally, the communication device according to the eighth aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communications device of the eighth aspect to perform the method of the fourth aspect.

Note that, the communication apparatus according to the eighth aspect may be a network device, or may be a chip (system) or other components or assemblies that may be provided in the network device, which is not limited in this application.

Further, the technical effects of the communication device according to the eighth aspect may refer to the technical effects of the method according to any one of the possible implementation manners of the fourth aspect, which are not described herein.

A ninth aspect provides a communication method, the method comprising: the terminal equipment receives configuration information from the network equipment, determines a non-zero projection coefficient according to the quantity of TRPs actually participating in cooperative transmission and the configuration information, and sends the non-zero projection coefficient to the network equipment. The configuration information comprises a corresponding relation between at least two coefficients beta and at least two first numbers, wherein the first numbers are numbers of TRPs actually participating in cooperative transmission, and the at least two coefficients beta are in one-to-one correspondence with the at least two first numbers.

In a tenth aspect, there is provided a communication method comprising: the network device sends configuration information to the terminal device and receives the non-zero projection coefficients from the terminal device. The configuration information comprises a corresponding relation between at least two coefficients beta and at least two first numbers, wherein the first numbers are numbers of TRPs actually participating in cooperative transmission, and the at least two coefficients beta are in one-to-one correspondence with the at least two first numbers.

An eleventh aspect provides a communication apparatus comprising: the device comprises a sending module, a receiving module and a processing module. The receiving module is used for receiving configuration information from the network equipment. And the processing module is used for determining non-zero projection coefficients according to the number of TRPs actually participating in cooperative transmission and the configuration information. And the sending module is used for sending the non-zero projection coefficient by the network equipment. The configuration information comprises a corresponding relation between at least two coefficients beta and at least two first numbers, wherein the first numbers are numbers of TRPs actually participating in cooperative transmission, and the at least two coefficients beta are in one-to-one correspondence with the at least two first numbers.

Optionally, the communication device according to the eleventh aspect may further include a processing module and a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communications apparatus of the eleventh aspect to perform the method of the ninth aspect.

The communication device according to the eleventh aspect may be a terminal device, or may be a chip (system) or other components or assemblies that may be provided in the terminal device, which is not limited in this application.

Further, the technical effects of the communication device according to the eleventh aspect may refer to the technical effects of the method according to any one of the possible implementation manners of the ninth aspect, which are not described herein.

In a twelfth aspect, there is provided a communication apparatus comprising: a transmitting module and a receiving module. And the sending module is used for sending the configuration information to the terminal equipment. And the receiving module is used for receiving the non-zero projection coefficients from the terminal equipment. The configuration information comprises a corresponding relation between at least two coefficients beta and at least two first numbers, wherein the first numbers are numbers of TRPs actually participating in cooperative transmission, and the at least two coefficients beta are in one-to-one correspondence with the at least two first numbers.

Optionally, the communication device according to the twelfth aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by a processing module, enable the communications device of the tenth aspect to perform the method of the fourth aspect.

The communication apparatus according to the twelfth aspect may be a network device, or may be a chip (system) or other parts or components that may be provided in the network device, which is not limited in this application.

Further, the technical effects of the communication device according to the twelfth aspect may refer to the technical effects of the method according to any one of the possible implementation manners of the tenth aspect, which are not described herein.

In a thirteenth aspect, a communication device is provided. The communication device includes: a processor coupled to a memory for storing a computer program.

The processor is configured to execute a computer program stored in the memory such that the method as described in any one of the possible implementations of the first to fourth aspects, the ninth to tenth aspects is performed.

In one possible design, the communication device according to the thirteenth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an input/output port. The transceiver may be used for the communication means to communicate with other devices.

The input port may be used to implement the receiving functions of the first to fourth aspects and the ninth to tenth aspects, and the output port may be used to implement the transmitting functions of the first to fourth aspects and the ninth to tenth aspects.

In this application, the communication apparatus according to the thirteenth aspect may be a terminal device or a network device, or a chip system disposed inside the terminal device or the network device.

Further, the technical effects of the communication device according to the thirteenth aspect may refer to the technical effects of the method according to any one of the implementation manners of the first to fourth aspects, the ninth to tenth aspects, and are not described herein again.

In a fourteenth aspect, a communication system is provided. The communication system comprises a communication device according to the fifth aspect and a communication device according to the sixth aspect. Alternatively, the communication system includes the communication device according to the seventh aspect, and the communication device according to the eighth aspect.

Alternatively, the communication system comprises a communication device according to the fifth aspect for implementing the method according to the first aspect, and a communication device according to the sixth aspect for implementing the method according to the second aspect. Alternatively, the communication system comprises a communication device according to the seventh aspect for implementing the method according to the third aspect, and a communication device according to the eighth aspect for implementing the method according to the fourth aspect.

In a fifteenth aspect, a chip system is provided that includes logic circuitry and an input/output port. Wherein the logic circuit is configured to implement the processing functions according to the first to fourth aspects and the ninth to tenth aspects, and the input/output port is configured to implement the transmitting/receiving functions according to the first to fourth aspects and the ninth to tenth aspects. In particular, the input port may be used to implement the receiving functions related to the first to fourth aspects, the ninth to tenth aspects, and the output port may be used to implement the transmitting functions related to the first to fourth aspects, the ninth to tenth aspects.

In one possible design, the chip system further includes a memory for storing program instructions and data implementing the functions of the first to fourth aspects and the ninth to tenth aspects.

The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a sixteenth aspect, there is provided a computer readable storage medium storing a computer program or instructions; the computer program or instructions, when run on a computer, cause the method of any one of the possible implementation manners of the first to fourth, ninth to tenth aspects to be performed.

A seventeenth aspect provides a computer program product comprising a computer program or instructions which, when run on a computer, cause the method of any one of the possible implementations of the first to fourth aspects, the ninth to tenth aspects to be performed.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic flow chart of acquiring CSI of a downlink channel according to an embodiment of the present application;

fig. 3 is a schematic diagram of cooperative transmission according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 5 is a flow chart of a method for indicating a cooperative transmission receiving point according to an embodiment of the present application;

Fig. 6 is a flowchart of another method for indicating a cooperative transmission receiving point according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of another communication device according to an embodiment of the present application.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The technical solution of the embodiments of the present application may be applied to various communication systems, such as a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a wireless local area network (wireless local area network, WLAN), a wireless fidelity (wireless fidelity, wi-Fi) system, a wired network, a vehicle-to-arbitrary object (vehicle to everything, V2X) communication system, an inter-device (D2D) communication system, a car networking communication system, a 4th generation (4th generation,4G) mobile communication system, such as a long term evolution (long term evolution, LTE) system, a worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, a fifth generation (5th generation,5G) mobile communication system, such as a new air interface (NR) system, and future communication systems, such as a sixth generation (6th generation,6G) mobile communication system, etc.

The present application will present various aspects, embodiments, or features about a system that may include multiple devices, components, modules, etc. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. Furthermore, combinations of these schemes may also be used.

In addition, in the embodiments of the present application, words such as "exemplary," "for example," and the like are used to indicate an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.

In the embodiments of the present application, "of", "corresponding" and "corresponding" may be sometimes used in combination, and it should be noted that the meaning to be expressed is consistent when the distinction is not emphasized.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems.

To facilitate understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be described in detail first with reference to the communication system shown in fig. 1 as an example. Fig. 1 is a schematic architecture diagram of a communication system to which the cooperative transmission receiving point indication method according to the embodiment of the present application is applicable.

As shown in fig. 1, the communication system includes a network device and a terminal device. Alternatively, the number of network devices may be one or more.

The network device may also be referred to as an access device, an access network device, or a radio access network device, where the network device is capable of managing radio resources, providing access services for a terminal device, and completing forwarding of data between the terminal device and a core network, and the network device may also be understood as a base station in a network.

The network device in the embodiment of the present application may be any communication device having a wireless transceiving function for communicating with a terminal device, for example. The network devices include, but are not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home evolved Node B, heNB, or home Node B, HNB), a baseBand unit (BBU), an Access Point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or TRP, etc., may also be 5G, such as a gNB in an NR system, or a transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or may also be network nodes constituting a gNB or a transmission point, such as a baseBand unit (BBU), or a Distributed Unit (DU), etc., and may also be a satellite, or an unmanned aerial vehicle, etc.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include an active antenna unit (active antenna unit, AAU). The CU implements part of the functionality of the gNB and the DU implements part of the functionality of the gNB. For example, the CU is responsible for handling non-real time protocols and services, implementing the functions of the RRC, packet data convergence layer protocol (packet data convergence protocol, PDCP) layer. The DU is responsible for handling physical layer protocols and real-time services, and implements functions of a radio link control (radio link control, RLC), MAC, and Physical (PHY) layers. The AAU realizes part of physical layer processing function, radio frequency processing and related functions of the active antenna. The information of the RRC layer is generated by the CU and finally becomes PHY layer information through PHY layer encapsulation of DU, or is converted from the information of the PHY layer. Thus, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be sent by DUs, or by dus+aaus. It is understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

The terminal equipment is a terminal with wireless receiving and transmitting function and can be arranged on a chip or a chip system of the terminal. A terminal device in this application may also be referred to as a terminal, user Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. The terminals in embodiments of the present application may be mobile phones (mobile phones), tablet computers (pad), unmanned aerial vehicles, computers with wireless transceiving functions, customer premise equipment (customer premise equipment, CPE), virtual Reality (VR) terminals, augmented reality (augmented reality, AR) terminals, internet of things terminals, wireless terminals in industrial control (industrial control), wireless terminals in unmanned aerial vehicles (self driving), wireless terminals in remote medical (remote media), wireless terminals in smart grid (smart grid), wireless terminals in transportation security (transportation safety), wireless terminals in smart city (smart home), cellular phones, cordless phones, session initiation protocol (session initiation protocol, SIP) phones, wireless local loop (wireless local loop, l) stations, personal digital assistants (personal digital assistant, PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, wireless terminals in smart grid (smart grid), future evolution terminals in smart home (smart home), terminals in the future, etc.

For another example, the terminal device in the present application may be an express terminal in smart logistics (e.g., a device that can monitor the position of a cargo vehicle, a device that can monitor the temperature and humidity of cargo, etc.), a wireless terminal in smart agriculture (e.g., a wearable device that can collect data related to livestock, etc.), a wireless terminal in smart architecture (e.g., a smart elevator, a fire monitoring device, and a smart meter, etc.), a wireless terminal in smart medical (e.g., a wearable device that can monitor the physiological state of a person or animal), a wireless terminal in smart transportation (e.g., a smart bus, a smart vehicle, a sharing bicycle, a charging pile monitoring device, a smart traffic light, and a smart monitoring and parking device, etc.), a wireless terminal in smart retail (e.g., a vending machine, a self-service checkout machine, and an unmanned convenience store, etc.). For another example, the terminal device in the present application may be an in-vehicle module, an in-vehicle component, an in-vehicle chip, or an in-vehicle unit that is built in a vehicle as one or more components or units, and the vehicle may implement the method provided in the present application through the in-vehicle module, the in-vehicle component, the in-vehicle chip, or the in-vehicle unit that is built in.

Alternatively, the communication system shown in fig. 1 may be applied to the communication network in question at present, or may be applied to other networks in the future, etc., which are not limited in particular by the embodiments of the present application.

It should be noted that, the method for indicating the cooperative transmission receiving point provided in the embodiment of the present application may be applicable between any two nodes shown in fig. 1, and specific implementation may refer to the following method embodiments, which are not described herein again.

It should be noted that the solution in the embodiments of the present application may also be applied to other communication systems, and the corresponding names may also be replaced by names of corresponding functions in other communication systems.

It should be understood that fig. 1 is a simplified schematic diagram that is merely exemplary for ease of understanding, and that other network devices, and/or other terminal devices, may also be included in the communication system, which are not shown in fig. 1.

In order to make the embodiments of the present application clearer, the following description will make some of the contents and concepts related to the embodiments of the present application.

First, a procedure of acquiring channel state information (channel state information, CSI) of a downlink channel:

in a frequency division duplex (frequency division duplexing, FDD) system, because there is a larger frequency point interval between the uplink channel and the downlink channel, the uplink channel and the downlink channel are not completely reciprocal, so that in the FDD system, the complete downlink channel cannot be obtained through uplink channel estimation, and the terminal device is required to feed back the CSI of the downlink channel to the network device.

For example, CSI may include, but is not limited to, precoding matrix indication (precoding matrix indicator, PMI), rank Indication (RI), channel quality indication (channel quality indicator, CQI), CSI reference signal (CSI-RS) resource indication (CSI-RS resource indicator, CRI), layer Indication (LI), and the like. It should be understood that the above listed details of CSI are merely exemplary and should not be construed as limiting the present application in any way. The CSI may include one or more of the above listed items, and may also include other information for characterizing CSI in addition to the above listed items, which is not limited in this application.

Fig. 2 is a flow chart of acquiring CSI of a downlink channel according to an embodiment of the present application.

As shown in fig. 2, S201, the network device transmits channel measurement configuration information to the terminal device. Accordingly, the terminal device receives channel measurement configuration information from the network device.

Alternatively, the channel measurement configuration information may be used to configure parameters of the downlink channel measurement.

Optionally, the channel measurement configuration information may include CSI-RS resource identification, a resource type of a reference channel, measurement period information, resource mapping information, and/or quasi co-location (QCL) configuration, etc.

S202, the network device sends a reference signal to the terminal device. Accordingly, the terminal device receives the reference signal from the network device.

S203, the terminal equipment sends the measurement result to the network equipment. Accordingly, the network device receives the measurement results from the terminal device.

The measurement results include downlink channel information, such as CSI of a downlink channel.

And S204, the network equipment sends data to the terminal equipment according to the CSI of the downlink channel. Accordingly, the terminal device receives data from the network device.

For example, the network device may determine precoding information of transmission data according to CSI of the downlink channel, thereby transmitting the data.

Second, cooperative transmission:

cooperative transmission refers to a plurality of TRPs simultaneously serving a certain terminal device.

By way of example, the cooperative transmission modes may include a CJT mode and a non-coherent joint transmission (NCJT) mode.

Illustratively, the CJT approach: multiple TRPs occupy the same time-frequency resource and simultaneously provide service for a certain terminal device by adopting a joint phase intervention coding mode.

Illustratively, NCJT mode: multiple TRPs occupy different time-frequency resources and simultaneously provide service for a certain terminal device by adopting a non-coherent precoding mode.

Fig. 3 is a schematic diagram of cooperative transmission according to an embodiment of the present application.

As shown in fig. 3, TRP1 to TRP3 serve UE1 in the CJT manner, and TRP4 and TRP5 serve UE3 in the CJT manner. TRP1, TRP2 and TRP4 serve UE2 using the NCJT approach.

Taking TRP1 to TRP3 as an example, the UE1 is served by CJT. TRP1 to TRP3 occupy the same time frequency resource while serving UE1, and for UE1, TRP1 to TRP3 in the coordinated set can be equivalently regarded as a station transmitting the downlink signal, and UE1 does not distinguish from which TRP the downlink signal originates. UE1 may measure the channel of UE1 to each TRP simultaneously.

Illustratively, UE1 may concentrate feedback measurements to one of TRP1 to TRP3 (e.g., a primary station of TRP1 to TRP 3), which may include CSI for reconstructing a downlink channel matrix or precoding matrix between UE1 and TRP1, CSI for reconstructing a downlink channel matrix or precoding matrix between UE1 and TRP2, and CSI for reconstructing a downlink channel matrix or precoding matrix between UE1 and TRP 3. The TRP receiving the measurement result may send CSI to the corresponding TRP. For example, TRP1 transmits CSI for reconstructing a downlink channel matrix or precoding matrix between UE1 and TRP2 and CSI for reconstructing a downlink channel matrix or precoding matrix between UE1 and TRP3 to TRP2 and TRP3, respectively, so that TRP1 to TRP3 can provide coherent joint transmission for UE1 according to the corresponding CSI.

The method for indicating the receiving point of the cooperative transmission provided in the embodiment of the present application may be applicable to a scenario of cooperative transmission, and specific implementation may refer to the following method embodiment, which is not described herein again.

Thirdly, the configuration mode of the channel measurement resources is as follows:

illustratively, assuming that the maximum number of TRPs participating in the cooperative transmission is L, the configuration manners of the resources of the channel measurement corresponding to the L TRPs may include the following manner 1, manner 2, and manner 3.

Mode 1,1 reference signal resource, and the maximum number of antenna ports is 32.

For example, 1 reference signal resource may be divided into a plurality of antenna port groups by the number of antenna ports, each antenna port group corresponding to one TRP. Wherein one antenna port group includes at least one antenna port.

For example, assuming l=4, the 4 TRPs employ 1 reference signal resource corresponding to 32 antenna ports, and in case of average allocation, each TRP corresponds to 8 antenna ports.

Alternatively, the reference signal resources may include non-zero power (NZP) CSI-RS resources.

Alternatively, in the present application, the antenna port may also be referred to as a reference signal port, a port, or a CSI-RS port, which is not limited.

Manner 2,K reference signal resources, K >1, the K reference signals may have the same or different number of antenna ports. Each of the K reference signal resources corresponds to one TRP, i.e., the K reference signal resources correspond to K TRPs.

Mode 3: k reference signal resources, K >1, the K reference signals may have the same number of antenna ports or different numbers of antenna ports. Each of the K reference signal resources may be divided into a plurality of antenna port groups by antenna port, each antenna port group corresponding to one TRP.

Fig. 4 is a schematic structural diagram of a communication device 400 that may be used to perform the cooperative transmission reception point indication method provided in the embodiments of the present application. The communication apparatus 400 may be a terminal device or a network device, or may be a chip or other parts or components applied to the terminal device or the network device.

As shown in fig. 4, the communication device 400 may include a processor 401. Optionally, the communication device 400 may also include one or more of a memory 402 and a transceiver 403. Wherein the processor 401 may be coupled to one or more of the memory 402 and the transceiver 403, such as may be connected by a communication bus, the processor 401 may also be used alone.

The following describes the respective constituent elements of the communication apparatus 400 in detail with reference to fig. 4:

the processor 401 is a control center of the communication apparatus 400, and may be one processor or a collective term of a plurality of processing elements. For example, processor 401 is one or more central processing units (central processing unit, CPU), but may also be an integrated circuit (application specific integrated circuit, ASIC), or one or more integrated circuits configured to implement embodiments of the present application, such as: one or more microprocessors (digital signal processor, DSPs), or one or more field programmable gate arrays (field programmable gate array, FPGAs).

Among other things, the processor 401 may perform various functions of the communication device 400 by running or executing software programs stored in the memory 402 and invoking data stored in the memory 402.

In a particular implementation, processor 401 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 4, as an embodiment.

In a specific implementation, as an embodiment, the communication apparatus 400 may also include a plurality of processors, such as the processor 401 and the processor 404 shown in fig. 4. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more communication devices, circuitry, and/or processing cores for processing data (e.g., computer program instructions).

The memory 402 may be, but is not limited to, read-only memory (ROM) or other type of static storage communication device that can store static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage communication device that can store information and instructions, but may also be electrically erasable programmable read-only memory (EEPROM), compact disc-read only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage communication device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 402 may be integrated with the processor 401 or may exist separately and be coupled to the processor 401 through an input/output port (not shown in fig. 4) of the communication device 400, which is not specifically limited in the embodiment of the present application.

The memory 402 is used for storing a software program for executing the scheme of the application, and the processor 401 controls the execution. The specific implementation manner may refer to the following method embodiments, which are not described herein.

A transceiver 403 for communication with other communication devices. For example, the communication apparatus 400 is a terminal device, and the transceiver 403 may be used to communicate with a network device or the like. As another example, the communication apparatus 400 is a network device, and the transceiver 403 may be used to communicate with a terminal device or the like. In addition, transceiver 403 may include a receiver and a transmitter (not separately shown in fig. 4). The receiver is used for realizing the receiving function, and the transmitter is used for realizing the transmitting function. Transceiver 403 may be integrated with processor 401 or may be separate and coupled to processor 401 through an input/output port (not shown in fig. 4) of communication device 400, as embodiments of the present application are not specifically limited in this regard.

It should be noted that the configuration of the communication apparatus 400 shown in fig. 4 is not limited to the communication apparatus, and an actual communication apparatus may include more or less components than those shown, or may combine some components, or may be different in arrangement of components.

In the prior art, the current 3GPP standard specifies the maximum number of TRPs for serving a terminal device by adopting a coherent joint transmission mode, and the terminal device reports the TRPs participating in cooperative transmission to a network device. The feedback overhead in this way is large.

In addition, before the terminal device reports the TRP participating in the cooperation, the network device may reserve reporting resources for the terminal device according to the maximum number, and since the number of TRP selected by the terminal device may be smaller than the maximum number, and the network device reserves reporting resources for the terminal device according to the maximum number, when the number of TRP selected by the terminal device participating in the cooperation transmission is smaller than the maximum number L, there may be a situation that reserved resources are wasted.

The manner in which a terminal device reports TRP participating in cooperative transmission to a network device is explained below in connection with examples 1 to 3.

Example 1, the standard specifies a maximum number of TRPs participating in the cooperative transmission of L, and the terminal device may indicate the TRPs actually participating in the cooperative transmission by reporting a transmission hypothesis (transmission hypothesis) to the network device. The transmission hypothesis includes a TRP selected by the terminal device to participate in the cooperative transmission.

The terminal device selects a TRP actually participating in the cooperative transmission from L TRPs, for example.

For example, assuming that l=4, e.g. TRP0 to TRP3, the terminal device selects 2 TRPs to participate in the cooperative transmission, the transmission corresponding to 2 TRPs is assumed to be 6, e.g. (TRP 0, TRP 1), (TRP 0, TRP 2), (TRP 0, TRP 3), (TRP 1, TRP 2), (TRP 1, TRP 3) and (TRP 2, TRP 3), the terminal device needs to report at least 2 TRPs selected by the terminal device using 3 bits.

In example 2, the standard specifies that the maximum number of TRP involved in the cooperative transmission is L, the network device informs the terminal device that the number of TRP actually involved in the cooperative transmission is N through higher layer signaling, the terminal device reports T transmission hypotheses to the network device, T is an integer greater than 1, and the network device selects one transmission hypothesis from the T transmission hypotheses to determine which N TRP is involved in the cooperative transmission.

For example, assuming that l=4, e.g. TRP0 to TRP3, n=2, and 6 transmission hypotheses, e.g. (TRP 0, TRP 1), (TRP 0, TRP 2), (TRP 0, TRP 3), (TRP 1, TRP 2), (TRP 1, TRP 3), and (TRP 2, TRP 3), are provided for the corresponding transmission hypotheses, the terminal device needs to select T transmission hypotheses from the 6 transmission hypotheses to report to the network device, and T may be an integer greater than 1 and less than 6. Assuming t=2, selecting 2 transmission hypotheses from the 6 transmission hypotheses has 15 possibilities, the terminal device needs to report at least the 2 TRPs selected by the terminal device with 4 bits. The network device selects TRP to participate in the cooperative transmission from 2 transmission hypotheses, e.g., the network device selects TRP0 and TRP1 to participate in the cooperative transmission.

Example 3, the standard specifies that the maximum number of TRP involved in the cooperative transmission is L, the TRP actually involved in the cooperative transmission is selected by the terminal device, and the TRP involved in the cooperative transmission is reported to the network device in the form of a bit map, and the bit number of the bit map is L.

For example, assuming l=4, e.g. TRP0 to TRP3, the terminal device selects TRP0 and TRP1 to participate in the cooperative transmission, the bit bitmap occupies at least 4 bits, e.g. bit bitmap 1100, indicating TRP0 and TRP1 to participate in the cooperative transmission.

In the related art, the overhead of the TRP manner of cooperative transmission is large.

In addition, before the terminal device reports the TRP participating in the cooperation, the network device may reserve reporting resources for the terminal device according to the maximum number L, and in the above examples 1 and 3, since the number of TRP selected by the terminal device may be smaller than the maximum number L, and the network device reserves reporting resources for the terminal device according to the maximum number L, when the number of TRP selected by the terminal device participating in the cooperation transmission is smaller than the maximum number L, there may be a situation that reserved resources are wasted.

In the method shown in fig. 5, the protocol predefining or the network device predefines that M reference signal resources or M TRPs corresponding to M antenna port groups must participate in the cooperative transmission, and the terminal device further selects TRPs participating in the cooperative transmission from the remaining L-M TRPs, so that the range of the terminal device selecting TRPs participating in the cooperative transmission is reduced, and the terminal device reports which TRPs among the remaining L-M reference signal resources or L-M TRPs corresponding to L-M antenna port groups participate in the cooperative transmission, so that the cost of the terminal device reporting the TRPs participating in the cooperative transmission can be reduced, and the complexity of processing of the terminal device can be reduced.

Based on the method shown in fig. 6, the protocol predefining or the network device predefines R candidate TRPs corresponding to R reference signal resources or R antenna port groups, where R is smaller than L, where L is the total number of TRPs supporting cooperative transmission, and the terminal device selects TRPs participating in the cooperative transmission from the R TRPs, which TRPs in the R reference signal resources or R antenna port groups participate in the cooperative transmission are reduced by the range of the TRPs selected by the terminal device, so that the cost of the terminal device in reporting the TRPs participating in the cooperative transmission can be reduced, and the complexity of processing by the terminal device can be reduced.

The method provided by the embodiment of the present application (the method shown in fig. 5 and fig. 6 described below) is not only applicable to a scenario of selection of cooperative TRP, but also applicable to a communication system in which a presentity (e.g., a terminal device) needs to send transmission direction indication information, and another entity (e.g., a network device) needs to receive the transmission direction indication information and determine a transmission direction of an antenna within a certain time according to the transmission direction indication information. The transmission direction indication information may include CSI for reconstructing a channel matrix or a precoding matrix between the terminal equipment and the network equipment.

The following fig. 5 and fig. 6 are illustrations of selection of TRP, and the method provided in the embodiments of the present application is equally applicable to selection of codebook space domain base, frequency domain base, and antenna port.

Taking the selection scenario for the frequency domain base as an example, the method shown in fig. 5. The protocol predefines or the network equipment predefines M frequency domain substrates selected by default, the terminal equipment further selects Y frequency domain substrates from the remaining L-M frequency domain substrates, L is the total number of the frequency domain substrates, and the terminal equipment reports the selected Y frequency domain substrates to the network equipment. Therefore, the terminal equipment further selects the frequency domain substrate from the rest frequency domain substrates, the selection range of the terminal equipment is reduced, the cost of reporting the terminal equipment and the complexity of selecting the frequency domain substrate by the terminal equipment can be reduced, and the processing complexity of the terminal equipment can also be reduced.

The method for indicating the cooperative transmission receiving point according to the embodiment of the present application will be specifically described with reference to fig. 5 to fig. 6. The methods shown in fig. 5-6 may be applied to the communication system shown in fig. 1 and the scenario shown in fig. 3, for example, in a scenario of cooperative transmission, such as a CJT scenario and an NCJT scenario. The network devices in fig. 5-6 may be any one of TRP when used in a CJT scenario or an NCJT scenario.

In which, the terms and the like related to the embodiments of the present application may refer to each other without limitation. The object name, the parameter name, and the like in the embodiment of the present application are just an example, and other names may be used in the specific implementation without limitation.

Fig. 5 is a schematic flow chart of a method for indicating a receiving point of cooperative transmission according to an embodiment of the present application.

As shown in fig. 5, the method for indicating the cooperative transmission receiving point includes the following steps:

s501, the terminal equipment acquires first information. The first information is used to indicate M TRPs that must participate in a cooperative transmission.

Illustratively, the first information is used to indicate M reference signal resources, or M antenna port groups.

Illustratively, M is an integer greater than or equal to 1.

For example, the first information may be used to indicate a number of M reference signal resources, or a number of M antenna port groups.

For example, the 1 st reference signal resource or 1 st antenna port group corresponds to a number of 0, and the other reference signal resources or antenna port groups are numbered in order of sequentially increasing 1.

Alternatively, the number of the reference signal resource may correspond to an identification (or index) of the reference signal resource.

For example, reference signal resource number 0 may correspond to reference signal resource identification x and reference signal resource number 1 may correspond to reference signal resource identification y.

Alternatively, at different times (e.g., different times of measuring CSI), the reference signal resource numbers may correspond to different reference signal resources (identification or index of reference signal resources).

For example, for the last measurement CSI or the last cooperative transmission, the reference signal resource number 0 corresponds to the reference signal resource identification x, and the reference signal resource number 1 corresponds to the reference signal resource identification y. For the measurement CSI or the cooperative transmission, the number 0 of the reference signal resource corresponds to the identification y of the reference signal resource, and the number 1 of the reference signal resource corresponds to the identification x of the reference signal resource.

Alternatively, the number of the antenna port group may correspond to the identity (or index) of the reference signal resource, similar to the number of the reference signal resource corresponding to the identity (or index) of the reference signal resource.

Alternatively, at different times (e.g., different times CSI is measured), the numbers of the antenna port groups may correspond to different reference signal resources (identities or indexes of reference signal resources).

Optionally, the network device may send, to the terminal device, a correspondence between the number of the reference signal resource and the identifier (or index) of the reference signal resource, or a correspondence between the number of the antenna port group and the identifier (or index) of the reference signal resource. For example, it may be performed before S501 described above.

For example, the correspondence of the number of the reference signal resource and the identification (or index) of the reference signal resource may include: the correspondence between the numbers of the L reference signal resources and the identities (or indexes) of the L reference signal resources may be, for example, one-to-one correspondence, where L is the total number of TRPs supporting cooperative transmission.

For example, the correspondence between the number of the antenna port group and the identification (or index) of the reference signal resource may include: the correspondence between the numbers of the L antenna port groups and the identifications (or indexes) of the L reference signal resources may be, for example, one-to-one correspondence.

Optionally, the network device may send, to the terminal device through higher layer signaling, a correspondence between the number of the reference signal resource and the identifier (or index) of the reference signal resource, or a correspondence between the number of the antenna port group and the identifier (or index) of the reference signal resource.

For example, the correspondence between the number of the reference signal resource and the identification (or index) of the reference signal resource, or the correspondence between the number of the antenna port group and the identification (or index) of the reference signal resource may be included in RRC signaling, MAC CE signaling, or DCI.

Illustratively, one of the M antenna port groups may include one or more antenna ports.

Illustratively, the M antenna port groups are in one-to-one correspondence with the M TRPs. The M TRPs are cooperative TRPs, and the first information is used for indicating that the M TRPs corresponding to the M antenna port groups are necessarily involved in cooperative transmission.

Illustratively, the M reference signal resources are in one-to-one correspondence with the M transmission-reception points TRP. The first information is used for indicating that M TRPs corresponding to the M reference signal resources are certain to participate in cooperative transmission.

Alternatively, the reference signal resources may include, but are not limited to, CSI-RS resources, such as NZP CSI-RS resources.

The content indicated by the first information is different for different channel measurement resource allocation modes.

Optionally, if the configuration mode of the channel measurement resource is mode 1 or mode 3, the first information is used to indicate M antenna port groups. If the configuration mode of the channel measurement resource is mode 2, the first information is used to indicate M reference signal resources.

The terminal equipment analyzes the first information according to the configuration mode of the channel measurement resources. If the configuration mode of the channel measurement resource is mode 1 or mode 3, and the first information indicates M antenna port groups, the first information indicates that M TRPs corresponding to the M antenna port groups must participate in cooperative transmission. If the configuration mode of the channel measurement resource is mode 2 and the first information indicates M reference signal resources, the first information indicates that M TRPs corresponding to the M reference signal resources must participate in the cooperative transmission.

Assuming that the configuration mode of the channel measurement resource is mode 1 or mode 3, m=1, the first information indicates the antenna port group 0, and the antenna port group 0 corresponds to TRP0, then TRP0 participates in the cooperative transmission. Assuming that the configuration mode of the channel measurement resources is mode 2, m=1, the first information indicates reference signal resource 1, and the reference signal resource 1 corresponds to TRP1, then TRP1 participates in the cooperative transmission. Alternatively, the configuration of the channel measurement resources may be predefined by the protocol or configured by the network device for the terminal device.

The configuration mode of the channel measurement resource is that the network equipment configures for the terminal equipment, and the method provided by the embodiment of the application further can include: the network equipment configures the configuration mode of the channel measurement resources to the terminal equipment. Accordingly, the terminal device receives the configuration mode of the channel measurement resource from the network device.

For example, the network device may inform the terminal device of the configuration of the channel measurement resources through higher layer signaling, for example, the configuration of the channel measurement resources may be included in RRC signaling, MAC CE signaling, or DCI.

The manner in which the terminal device obtains the first information may be varied, for example, the first information may be configured by the network device for the terminal device, or pre-configured or pre-defined by a protocol, or specified by a protocol.

The first information is configured by the network device for the terminal device, and S501 may include: s501a, the network device sends first information to the terminal device. Accordingly, the terminal device receives the first information from the network device.

Optionally, the first information may be included in a higher layer signaling, and the network device may inform the terminal device that M reference signal resources or M TRPs corresponding to M antenna port groups must participate in the cooperative transmission through the higher layer signaling.

For example, the first information may be included in RRC signaling, MAC CE signaling, or DCI.

As such, the M reference signal resources or the M TRPs corresponding to the M antenna port groups may be determined by the network device and sent to the terminal device.

In some embodiments, the method provided in the embodiments of the present application may further include: and S504, the network equipment determines the first information according to the fifth information.

Optionally, the fifth information may include, but is not limited to, one or more of the following: information of the uplink channel, reference signal received power (reference signal receiving power, RSRP), and angle delay pair information.

For example, the network device may make channel sounding reference signal (sounding reference signal, SRS) measurements to obtain information for the uplink channel.

For example, the network device may determine RSRP based on the power of the received reference signal.

For example, the network device may obtain the angle delay pair information according to the information of the uplink channel.

In this way, the network device obtains M reference signal resources or M TRPs corresponding to M antenna port groups according to the existing prior information (e.g., fifth information) and must participate in cooperative transmission.

Optionally, S504 may include: the network device determines the first information based on the second information and the fifth information.

Alternatively, the second information may be used to indicate that the total number of TRPs supporting cooperative transmission is L.

Optionally, L is greater than 1.

Alternatively, M is greater than or equal to 1 and less than L.

Alternatively, Y is greater than or equal to 1 and less than or equal to L-M.

Alternatively, N is greater than 1 and less than or equal to L.

For example, the second information may indicate a maximum number of TRPs participating in the cooperative transmission, e.g., l=4.

For example, the network device may select M TRPs with larger RSRP from the L TRPs according to RSRP corresponding to the L TRPs, which is not limited in the present application.

For another example, the network device may select, from the L TRPs, a TRP with a larger power corresponding to the M angle delay pair information according to the angle delay pair information corresponding to the L TRPs, which is not limited in this application.

For another example, the network device may select M TRPs from the L TRPs according to information of uplink channels to which the L TRPs correspond respectively.

In this way, the network device determines that the M TRPs are certain to participate in the cooperative transmission according to the existing priori information, so that the range of the TRPs selected to participate in the cooperative transmission by the terminal device can be reduced, the overhead of the terminal device in reporting the TRPs participating in the cooperative transmission is reduced, and the processing complexity of the terminal device can be reduced.

Alternatively, the above S504 may be performed before the above S501, for example, before the above S501 a.

In this application, pre-configured or pre-defined or defined by a protocol may refer to pre-storing information in a terminal device or a network device.

For example, assuming that m=1, the protocol may specify that the reference signal resource 0, or TRP corresponding to antenna port group 0, must participate in the cooperative transmission.

For example, the numbers of the reference signal resources or the numbers of the antenna port groups are sequentially ordered from small to large, and the protocol may specify that the first M reference signal resources or TRPs corresponding to the antenna port groups must participate in the cooperative transmission.

In this way, the protocol predefines that a certain M TRPs are certain to participate in the cooperative transmission, which can reduce the range of the TRPs selected by the terminal device to participate in the cooperative transmission, thereby reducing the cost of reporting the TRPs participating in the cooperative transmission by the terminal device, reducing the signaling cost of the network device for transmitting the first information to the terminal device, and reducing the complexity of processing by the terminal device. In addition, M is greater than 1, so that the number of cooperative TRPs which least participate in providing services for the terminal can be ensured.

S502, the terminal equipment determines Y cooperative TRPs according to the first information and the second information.

Illustratively, Y collaborative TRPs are included in the L-M TRPs.

Illustratively, the L-M TRPs are ones of the L TRPs other than the M TRPs (e.g., the M TRPs corresponding to the M reference signal resources or the M TRPs corresponding to the M antenna port groups).

Optionally, Y is less than or equal to L-M.

For example, Y is an integer greater than 0 and less than or equal to L-M.

Alternatively, the Y cooperative TRPs may be TRPs with a larger sum of projection factor powers, or TRPs with a larger sum of projection factor magnitudes, or TRPs with a larger sum of projection factor powers selected to be reported, or TRPs with a larger sum of projection factor magnitudes selected to be reported.

For example, the terminal device may select the TRP having the largest sum of the Y projection coefficient powers or the TRP having the largest sum of the Y projection coefficient amplitudes according to the projection coefficient powers or the projection coefficient amplitudes corresponding to the L-M TRPs, respectively. The projection coefficients are obtained by projecting a channel matrix or a precoding matrix between the terminal equipment and the TRP on the substrate.

The present application does not define how the terminal device selects Y cooperative TRPs among the remaining L-M reference signal resource identifiers or TRPs corresponding to the antenna port group to participate in the cooperative transmission.

Taking the antenna port group as an example, assuming that l=4, where the antenna port group 0 to the antenna port group 3 respectively correspond to one TRP, m=1, and the first information indicates that the TRP corresponding to the antenna port group 0 must participate in cooperative transmission, the terminal device may select 1 (assuming that y=1) TRP from the TRPs corresponding to the antenna port group 1, the antenna port group 2 and the antenna port group 3 to participate in coherent cooperative transmission, for example, the third information indicates that the TRP corresponding to the antenna port group 1 participates in cooperative transmission.

Taking the antenna port group as an example, assuming that l=4, where the antenna port group 0 to the antenna port group 3 respectively correspond to one TRP, and m=1, and the first information indicates that the TRP corresponding to the antenna port group 0 must participate in cooperative transmission, the terminal device may select 2 (assuming that y=2) TRPs from the TRPs corresponding to the antenna port group 1, the antenna port group 2, and the antenna port group 3 to participate in coherent cooperative transmission, for example, the third information indicates that the TRP corresponding to the antenna port group 1 and the TRP corresponding to the antenna port group 2 participate in cooperative transmission.

In this way, the protocol predefining or the network device determines that the M TRPs are certain to participate in the cooperative transmission, so that the range of the terminal device selecting the TRPs participating in the cooperative transmission is reduced, and the terminal device only needs to report which TRPs in the remaining L-M TRPs participate in the cooperative transmission, thereby reducing the cost of the terminal device reporting the TRPs participating in the cooperative transmission, and also reducing the processing complexity of the terminal device.

In some embodiments, S502 may include: the following steps one to two.

Step one, the terminal equipment acquires fourth information. And step two, the terminal equipment determines Y collaborative TRPs according to the first information, the second information and the fourth information.

Alternatively, the fourth information may be used to indicate that the total number of TRPs actually participating in the cooperative transmission is N.

For example, the fourth information may indicate that the total number of TRPs actually participating in the cooperative transmission is N.

Alternatively, Y may be equal to N-M.

Optionally, the fourth information is from the network device, or the fourth information is determined by the terminal device, or the fourth information is predefined by a protocol, or the fourth information is determined by a negotiation between the network device and the terminal device.

For example, the fourth information may be determined by the network device, which transmits the fourth information to the terminal device, and accordingly, the terminal device receives the fourth information from the network device.

Optionally, the fourth information may be included in higher layer signaling, and the network device may send the fourth information to the terminal device through the higher layer signaling, indicating that the total number of TRPs actually participating in the cooperative transmission is N.

For example, the fourth information may be included in RRC signaling, MAC CE signaling, or DCI. As such, the network device may transmit fourth information to the terminal device through RRC signaling, MAC CE signaling, or DCI. Illustratively, N is greater than or equal to M.

For example, N is an integer greater than or equal to M. Assuming that m=1, n may be equal to 2.

Optionally, N is less than or equal to L, which is the total number of TRPs supporting cooperative transmission.

For example, N is an integer greater than or equal to M and less than or equal to L.

For example, the protocol predefining or the network device determines that the M TRPs must participate in the cooperative transmission, the total number of TRPs actually participating in the cooperative transmission is N, the terminal device determines other N-M TRPs participating in the cooperative transmission, and finally, the N-M TRPs and the M TRPs perform the cooperative transmission simultaneously.

Alternatively, the fourth information may be used to indicate that the total number of TRPs actually participating in the cooperative transmission is at least N, and the third information may be used to indicate the identification of at least N-M reference signal resources or the identification of at least N-M antenna port groups, for example. In this way, the terminal device may select at least N-M TRPs to participate in the cooperative transmission from the remaining L-M reference signal resource identifiers or TRPs corresponding to the antenna port group.

Illustratively, the N-M TRPs may be included in the L-M TRPs.

Alternatively, the N-M TRPs may be TRPs with a larger sum of projection factor powers, or TRPs with a larger sum of projection factor magnitudes, or TRPs with a larger sum of projection factor powers selected to be reported, or TRPs with a larger sum of projection factor magnitudes selected to be reported.

For example, the terminal device may select a TRP having the largest sum of the N-M projection coefficient powers or a TRP having the largest sum of the N-M projection coefficient amplitudes according to the projection coefficient powers or the projection coefficient amplitudes corresponding to the L-M TRPs, respectively. The projection coefficients are obtained by projecting a channel matrix or a precoding matrix between the terminal equipment and the TRP on the substrate.

The present application does not define how the terminal device selects at least N-M TRPs to participate in the cooperative transmission among the remaining L-M reference signal resource identifiers or TRPs corresponding to the antenna port group.

Taking the antenna port group as an example, assuming that l=4, where the antenna port group 0 to the antenna port group 3 respectively correspond to one TRP, m=1, the first information indicates that the TRP corresponding to the antenna port group 0 must participate in the cooperative transmission, and N is equal to 2, the terminal device may select 1 TRP from the TRPs corresponding to the antenna port group 1, the antenna port group 2, and the antenna port group 3 to participate in the coherent cooperative transmission, for example, the third information indicates that the TRP corresponding to the antenna port group 1 participates in the cooperative transmission.

Taking the antenna port group as an example, assuming that l=4, where the antenna port group 0 to the antenna port group 3 respectively correspond to one TRP, m=1, the first information indicates that the TRP corresponding to the antenna port group 0 must participate in the cooperative transmission, and N is equal to 3, the terminal device may select 2 TRPs from the TRPs corresponding to the antenna port group 1, the antenna port group 2 and the antenna port group 3 to participate in the coherent cooperative transmission, for example, the third information indicates that the TRP1 corresponding to the antenna port group 1 and the TRP corresponding to the antenna port group 2 participate in the cooperative transmission.

In some embodiments, the second information may be from the network device or predefined for the protocol.

For example, the network device may send the second information to the terminal device, and accordingly the terminal device receives the second information from the network device.

Alternatively, the second information may be included in higher layer signaling, and the network device may send the second information to the terminal device through the higher layer signaling.

Alternatively, the second information may be included in RRC signaling, MAC CE signaling, or DCI. As such, the network device may transmit the second information to the terminal device through RRC signaling, MAC CE signaling, or DCI.

S503, the terminal device sends the third information to the network device. Accordingly, the network device receives the third information from the terminal device.

The third information may be determined by the terminal device from the first information and the second information, for example. Illustratively, the third information is used to indicate Y reference signal resources, or Y antenna port groups.

For example, the third information may be used to indicate the number of Y reference signal resources, or the number of Y antenna port groups.

Optionally, Y is an integer greater than 0.

Illustratively, the Y reference signal resources are in one-to-one correspondence with the Y cooperative TRPs.

Illustratively, the Y antenna port groups are in one-to-one correspondence with the Y cooperative TRPs.

Illustratively, the Y cooperative TRPs are engaged in cooperative transmission simultaneously with the M cooperative TRPs.

That is, the third information may be used to indicate that Y cooperative TRPs corresponding to the Y antenna port groups use a cooperative transmission manner to provide services for the terminal device at the same time, or the third information may be used to indicate that Y cooperative TRPs corresponding to the Y reference signal resources use a cooperative transmission manner to provide services for the terminal device at the same time.

In this way, the protocol predefining or the network device determines that M TRPs must participate in the cooperative transmission, the terminal device determines other Y TRPs participating in the cooperative transmission, and finally, the Y cooperative TRPs and the M TRPs perform the cooperative transmission simultaneously.

In some embodiments, the third information may include a first field.

Optionally, the first field is used to indicate Y cooperative TRPs corresponding to the Y reference signal resources.

Or, optionally, the first field is used to indicate Y cooperative TRPs corresponding to the Y antenna port groups.

Alternatively, Y may be equal to N-M.

Optionally, the first field may further indicate that L-Y-M TRPs corresponding to the L-Y-M reference signal resources are not involved in the cooperative transmission.

Or, alternatively, the first field may further indicate that L-Y-M TRPs corresponding to the L-Y-M antenna port groups do not participate in the cooperative transmission.

Or, alternatively, the first field may further indicate that L-N TRPs corresponding to the L-N reference signal resources do not participate in the cooperative transmission.

Or, alternatively, the first field may further indicate that L-N TRPs corresponding to the L-N antenna port groups do not participate in the cooperative transmission.

In some embodiments, the first field comprises a bit map.

Alternatively, the bit length of the first field may be related to the value of L-M, e.g. the number of bits of the bit map may be equal to L-M.

For example, assuming l=4, m=1, the bit length of the first field may be 4-1=3.

In some embodiments, L-M bits may correspond one-to-one with L-M reference signal resources.

Optionally, the correspondence between the L-M bits and the L-M reference signal resources may satisfy a first rule, where the first rule includes: from left to right (or from right to left), the 1 st bit to the L-M th bit of the L-M bits sequentially correspond to the reference signal resource numbers of the L-M reference signal resources from small to large.

For example, the 1 st bit of the L-M bits corresponds to the reference signal resource with the smallest number of the L-M reference signal resources, and the L-M bit of the L-M bits corresponds to the reference signal resource with the largest number of the L-M reference signal resources.

Taking the numbers of the reference signal resources from the 1 st bit to the L-M th bit in the L-M bits and the L-M reference signal resources from small to large as an example.

Assuming that l=4 and m=1, the reference signal resource 0 to the reference signal resource 3 correspond to one TRP, respectively, if the first information indicates the reference signal resource 0, the bit length of the first field may be 3, and the 1 st bit to the 3 rd bit of the bit map correspond to the reference signal resource 1 to the reference signal resource 3, respectively. If the first information indicates the reference signal resource 1, the bit length of the first field may be 3, the 1 st bit of the bit map may correspond to the reference signal resource 0, the 2 nd bit of the bit map may correspond to the reference signal resource 2, and the 3 rd bit of the bit map may correspond to the reference signal resource 3.

Alternatively, the first rule may be predefined by a protocol, or agreed by the network device with the terminal device, or notified to the terminal device after the network device determines.

Optionally, the specific correspondence manner between the L-M bits and the numbers of the L-M reference signal resources is not limited, and the first rule is just an example, and the correspondence relationship between the L-M bits and the L-M reference signal resources may be that the L-M bits and the L-M reference signal resources may be in one-to-one correspondence.

For example, a value of 1 of a bit corresponding to a reference signal resource indicates that a TRP corresponding to the reference signal resource participates in cooperative transmission, and a value of 0 of a bit corresponding to a reference signal resource indicates that the TRP corresponding to the reference signal resource does not serve a terminal device.

Or, for example, a value of 0 of a bit corresponding to a reference signal resource indicates that a TRP corresponding to the reference signal resource participates in cooperative transmission, and a value of 1 of a bit corresponding to a reference signal resource indicates that the TRP corresponding to the reference signal resource does not serve a terminal device, which is not limited in the embodiment of the present application.

For example, the TRP corresponding to the reference signal resource not serving the terminal device may refer to: at the moment when other TRPs participate in the cooperative transmission, the TRP corresponding to the reference signal resource does not serve the terminal equipment or participate in the cooperative transmission.

For example, assuming that y+m TRPs corresponding to y+m reference signal resources perform cooperative transmission at a first time, L-Y-M TRPs corresponding to L-Y-M reference signal resources do not serve the terminal device at the first time or participate in the cooperative transmission at the first time.

For another example, assuming that N TRPs corresponding to N reference signal resources perform cooperative transmission at a first time, L-N TRPs corresponding to L-N reference signal resources do not serve the terminal device at the first time or participate in the cooperative transmission at the first time.

For example, assuming that l=4 and m=1, the reference signal resource 0 to the reference signal resource 3 respectively correspond to one TRP, the first information indicates that the reference signal resource 0, the terminal device selects the TRP corresponding to the reference signal resource 2 to participate in the cooperative transmission, the first field may occupy 3 bits, the bit bitmap is 010, indicates that the TRP corresponding to the reference signal resource 2 participates in the cooperative transmission, and the TRP corresponding to the reference signal resource 1 and the TRP corresponding to the reference signal resource 3 do not serve the terminal device or participate in the cooperative transmission.

For example, assuming that l=4 and m=1, the reference signal resource 0 to the reference signal resource 3 respectively correspond to one TRP, the first information indicates the reference signal resource 1, the terminal device selects the TRP corresponding to the reference signal resource 2 to participate in the cooperative transmission, the first field may occupy 3 bits, the bit bitmap is 010, indicates the TRP corresponding to the reference signal resource 2 to participate in the cooperative transmission, and the TRP corresponding to the reference signal resource 0 and the TRP corresponding to the reference signal resource 3 do not serve the terminal device or participate in the cooperative transmission.

In other embodiments, L-M bits may correspond one-to-one to the L-M antenna port groups. The L-M bits described above may be in one-to-one correspondence with L-M reference signal resources.

Optionally, the correspondence between the L-M bits and the L-M antenna port groups may satisfy a second rule, where the second rule includes: from left to right (or from right to left), the 1 st bit to the L-M th bit of the L-M bits sequentially correspond to the numbers of the antenna port groups of the L-M antenna port groups from small to large. For specific implementation, reference may be made to the first rule, which is not described herein.

Alternatively, the second rule may be predefined by the protocol, or agreed by the network device with the terminal device, or notified to the terminal device after the network device determines.

Optionally, the specific correspondence manner between L-M bits and the numbers of L-M antenna port groups is not limited, and the second rule is just an example, and the correspondence relationship between L-M bits and L-M antenna port groups may be that L-M bits and L-M antenna port groups may be in one-to-one correspondence.

For example, a value of 1 for a bit corresponding to an antenna port group indicates that a TRP corresponding to the antenna port group participates in cooperative transmission, and a value of 0 for a bit corresponding to the antenna port group indicates that a TRP corresponding to the antenna port group does not serve a terminal device or does not participate in cooperative transmission.

Or, for example, a value of 0 of a bit corresponding to an antenna port group indicates that the TRP corresponding to the antenna port group participates in cooperative transmission, and a value of 1 of a bit corresponding to the antenna port group indicates that the TRP corresponding to the antenna port group does not serve a terminal device or does not participate in cooperative transmission.

For example, a TRP corresponding to a group of antenna ports not serving a terminal device may refer to: at the moment when other TRPs perform cooperative transmission, the TRP corresponding to the antenna port group does not serve the terminal equipment or participate in the cooperative transmission.

For example, assuming that y+m TRPs corresponding to y+m antenna port groups perform cooperative transmission at a first time, L-Y-M TRPs corresponding to L-Y-M antenna port groups do not serve terminal equipment at the first time or participate in cooperative transmission at the first time.

For another example, assuming that N TRPs corresponding to N antenna port groups perform cooperative transmission at a first time, L-N TRPs corresponding to L-N antenna port groups do not serve terminal equipment at the first time and do not participate in cooperative transmission at the first time.

Taking the numbers of the antenna port groups in the L-M antenna port groups and the 1 st bit to the L-M bit in the L-M bits from left to right as an example, the numbers of the antenna port groups in the L-M antenna port groups are sequentially corresponding from small to large.

For example, assuming that l=4 and m=1, where the antenna port group 0 to the antenna port group 3 respectively correspond to one TRP, the first information indicates that the antenna port group 0, the terminal device selects the TRP corresponding to the antenna port group 2 for cooperative transmission, the first field may occupy 3 bits, and the bit bitmap is 010, to indicate that the TRP corresponding to the antenna port group 2 participates in cooperative transmission, and that the TRP corresponding to the antenna port group 1 and the TRP corresponding to the antenna port group 3 do not serve the terminal device or do not participate in cooperative transmission.

For example, assuming that l=4 and m=1, where the antenna port group 0 to the antenna port group 3 respectively correspond to one TRP, the first information indicates that the antenna port group 1, the terminal device selects the TRP corresponding to the antenna port group 2 to participate in the cooperative transmission, the first field may occupy 3 bits, and the bit bitmap is 010, to indicate that the TRP corresponding to the antenna port group 2 participates in the cooperative transmission, and the TRP corresponding to the antenna port group 0 and the TRP corresponding to the antenna port group 3 do not serve the terminal device or participate in the cooperative transmission.

In this way, the protocol predefining or the network device predefines that M TRPs must participate in the cooperative transmission, which reduces the range of the TRPs that the terminal device selects to participate in the cooperative transmission, and the terminal device only needs to report which TRPs in the remaining L-M TRPs participate in the cooperative transmission, and the terminal device only needs L-M bits to indicate the TRPs that participate in the cooperative transmission.

In other embodiments, the first field includes a transmission hypothesis.

In this way, the terminal device can tell the network device the TRP involved in the cooperative transmission in the form of reporting the transmission hypothesis.

Optionally, the first field may be used to indicate Y cooperative TRPs corresponding to the Y reference signal resources. Or, alternatively, the first field may be used to indicate Y cooperative TRPs corresponding to Y antenna port groups.

In other embodiments, the third information includes a second field.

Optionally, the second field may be used to indicate M TRPs corresponding to the M reference signal resources and Y TRPs corresponding to the Y cooperative reference signal resources. Or, alternatively, the second field may be used to indicate M TRPs corresponding to M antenna port groups and Y cooperative TRPs corresponding to Y antenna port groups.

Alternatively, Y may be equal to N-M.

The second field includes a transmission hypothesis.

Taking the antenna port group as an example, assuming that l=4 and m=1, where the antenna port group 0 to the antenna port group 3 correspond to one TRP respectively, the first information indicates the antenna port group 0, and the terminal device may select 1 (taking y=1 as an example or taking n=2 and y=n-m=1) TRP among the TRPs corresponding to the antenna port group 1 to the antenna port group 3, if there are 3 types of transmission, for example (antenna port group 1), (antenna port group 2), (antenna port group 3) (corresponding to the first field); alternatively, if there are 3 types of transmission including antenna port group 0, for example (antenna port group 0, antenna port group 1), (antenna port group 0, antenna port group 2), (antenna port group 0, antenna port group 3) (corresponding to the second field), the bit length of the first field may be 2 bits.

For example, the first field is 00, which may indicate that TRP corresponding to antenna port group 1 participates in cooperative transmission; the first field is 01, and can indicate that the TRP corresponding to the antenna port group 2 participates in cooperative transmission; the first field is 10, which may indicate that the TRP corresponding to the antenna port group 3 participates in cooperative transmission.

Or, the second field is 00, which can indicate that TRP0 corresponding to antenna port group 0 and TRP corresponding to antenna port group 1 perform cooperative transmission simultaneously; the second field is 01, and can indicate that the TRP corresponding to the antenna port group 0 and the TRP corresponding to the antenna port group 2 perform cooperative transmission at the same time; the second field is 10, which may indicate that the TRP corresponding to the antenna port group 0 and the TRP corresponding to the antenna port group 3 perform cooperative transmission at the same time.

Assuming that the terminal device selects the TRP corresponding to the antenna port group 2 to participate in the cooperative transmission, the first field (or the second field) is 00, and the bit length of the first field (or the second field) is 2 bits. Compared with the above example 1 in which 2 TRP participates in the cooperative transmission and the terminal device needs to report to the network device by using 3 bits, in the method shown in fig. 5, the protocol predefining or the network device predefining 1 TRP must participate in the cooperative transmission, the terminal device only needs 2 bits to indicate another TRP participating in the cooperative transmission, so that the cost of reporting the TRP participating in the cooperative transmission by the terminal device can be reduced, and the complexity of processing by the terminal device can be reduced.

Alternatively, assuming that the terminal device transmits 2 transmission hypotheses out of the 3 transmission hypotheses to the network device, selecting, by the network device, TRP participating in cooperative transmission from the 2 transmission hypotheses, 3 possibilities for selecting 2 transmission hypotheses out of the 3 transmission hypotheses, the first field (or the second field) may be 2 bits in bit length, for example, the first field (or the second field) may be 00, which may indicate transmission hypotheses (antenna port group 1) and (antenna port group 2) (or the second field may be 00, which may indicate transmission hypotheses (antenna port group 0, antenna port group 1) and (antenna port group 0, antenna port group 2)); a first field of 01 may indicate transmission hypotheses (antenna port group 1) and (antenna port group 3) (or a second field of 01 may indicate transmission hypotheses (antenna port group 0, antenna port group 1) and (antenna port group 0, antenna port group 3)); the first field of 10 may indicate transmission hypotheses (antenna port group 2) and (antenna port group 3) (or the second field of 10 may indicate transmission hypotheses (antenna port group 0, antenna port group 2) and (antenna port group 0, antenna port group 3)). Compared with the case that 2 TRP participates in the cooperative transmission in the above example 2, in the method shown in fig. 5, the terminal device needs to use 4 bits to indicate 2 transmission hypotheses among 6 transmission hypotheses, where the protocol predefines or the network device predefines that 1 TRP participates in the cooperative transmission must participate in the cooperative transmission, and the terminal device can indicate 2 transmission hypotheses among 3 transmission hypotheses only by using 2 bits, so that the overhead of reporting the TRP participating in the cooperative transmission by the terminal device can be reduced, and the complexity of processing by the terminal device can be reduced.

For example, assuming that l=4 and m=2, where antenna port group 0 to antenna port group 3 correspond to one TRP, respectively, the first information indicates that antenna port group 0 and antenna port group 1, the terminal device may select 1 (taking y=1 as an example, or n=3 and y=n-m=1) TRP among the TRPs corresponding to antenna port group 1 to antenna port group 3, respectively, and then transmission is assumed to be 2 types, for example (antenna port group 2), (antenna port group 3); alternatively, the bit length of the first field or the second field may be 1 bit assuming that there are 2 types of transmissions including antenna port group 0 and antenna port group 1, e.g., (antenna port group 0, antenna port group 1, antenna port group 2), (antenna port group 0, antenna port group 1, antenna port group 3).

For example, the first field is 0, which may indicate that the TRP corresponding to the antenna port group 2 participates in cooperative transmission; the first field is 1, which may indicate that the TRP corresponding to the antenna port group 3 participates in cooperative transmission.

Or, the second field is 0, which may indicate that the TRP corresponding to the antenna port group 0, the TRP corresponding to the antenna port group 1, and the TRP corresponding to the antenna port group 2 perform cooperative transmission at the same time; the second field is 1, which may indicate that the TRP corresponding to the antenna port group 0, the TRP corresponding to the antenna port group 1, and the TRP corresponding to the antenna port group 3 perform cooperative transmission at the same time.

Assuming that the terminal device selects the TRP corresponding to the antenna port group 2 to participate in the cooperative transmission, the first field (or the second field) is 0, and the bit length of the first field (or the second field) is 2 bits. With the method in the above example 1, the terminal device needs to report 3 TRPs to the network device by using 2 bits to participate in the cooperative transmission, and in the method shown in fig. 5, the protocol predefining or the network device predefines that 2 TRPs must participate in the cooperative transmission, the terminal device only needs 1 bit to indicate another TRP participating in the cooperative transmission, so that the overhead of reporting the TRPs participating in the cooperative transmission by the terminal device can be reduced, and the complexity of processing by the terminal device can also be reduced.

In some embodiments, the first field may be configured in Part1 (Part 1) information of the third information. The second field may be configured in part1 information of the third information.

Optionally, the third information may be used by the network device to reconstruct the channel matrix, and/or the precoding matrix.

Illustratively, the third information may include part1 information, and the part1 information may include the first field or the second field.

Optionally, the third information may further comprise part 2 information.

For example, the part1 information may be used to determine the number of bits that the part 2 information needs to occupy.

In some embodiments, the third information may be CSI.

For example, the part 1 information may include RI, CQI, and the number of total non-zero projection coefficients corresponding to all layers.

For example, the part 2 information mainly includes PMI information, and/or LI information, etc.

For example, PMI information may include, but is not limited to, one or more of the following: non-zero projection coefficient bit map information, spatial component selection indication information, frequency domain component selection indication information, non-zero projection coefficient amplitude and phase quantization information.

In some embodiments, if the fourth information is determined by the terminal device and N is equal to L, the third information may not include the first field or the second field.

For example, in case all TRPs participate in the cooperative transmission, the terminal device may not indicate the TRPs participating in the cooperative transmission, and the third information not including the first field or the second field may implicitly indicate that N is equal to L.

In this way, the terminal device does not need to report which TRPs participate in the cooperative transmission, and the reporting overhead of the terminal device can be further reduced.

In some embodiments, if the fourth information is determined by the terminal device and N is equal to M, the third information does not include the first field or the second field.

For example, in case only M TRPs specified by the network device or predefined by the protocol participate in the cooperative transmission, the terminal device may not indicate the TRPs participating in the cooperative transmission, and the third information not including the first field (or the second field) may implicitly indicate that N is equal to M. In this way, the terminal device does not need to report which TRPs participate in the cooperative transmission, and the reporting overhead of the terminal device can be further reduced.

Or, alternatively, in the case where all TRPs do not participate in the cooperative transmission, the terminal device may not indicate the TRPs participating in the cooperative transmission.

In some embodiments, the third information may be included in UCI.

For example, the network device may transmit the third information to the terminal device through the UCI, which may include the third information.

Based on the method shown in fig. 5, the protocol predefining or the network device predefines that M reference signal resources or M TRPs corresponding to M antenna port groups must participate in the cooperative transmission, and the terminal device further selects TRPs participating in the cooperative transmission from the remaining L-M TRPs, so that the range of the TRPs participating in the cooperative transmission selected by the terminal device is reduced, the terminal device only needs to report which TRPs of the remaining L-M reference signal resources or L-M TRPs corresponding to L-M antenna port groups participate in the cooperative transmission, so that the cost of reporting the TRPs participating in the cooperative transmission by the terminal device can be reduced, and the processing complexity of the terminal device can be reduced.

Fig. 6 is a schematic flow chart of another method for indicating a receiving point of cooperative transmission according to an embodiment of the present application. The method shown in fig. 6 is illustrated by way of example with a protocol pre-definition or a network device pre-determining R candidate TRPs.

As shown in fig. 6, the method for indicating the cooperative transmission receiving point includes the following steps:

s601, the network device sends sixth information to the terminal device. Accordingly, the terminal device receives the sixth information from the network device.

Illustratively, the sixth information may be used to indicate R reference signal resources, or R antenna port groups.

Illustratively, R is an integer greater than or equal to 1.

For example, the sixth information may be used to indicate the number of R reference signal resources, or the number of R antenna port groups.

Alternatively, the number of the reference signal resource may correspond to an identification (or index) of the reference signal resource. Reference is made in particular to the corresponding explanation in S501 above.

Alternatively, the number of the antenna port group may correspond to the identity (or index) of the reference signal resource, similar to the number of the reference signal resource corresponding to the identity (or index) of the reference signal resource. Reference is made in particular to the corresponding explanation in S501 above.

Illustratively, one of the R antenna port groups may include one or more antenna ports.

Illustratively, the R antenna port groups are in one-to-one correspondence with R TRPs.

Illustratively, the R TRPs are candidate cooperative TRPs.

Illustratively, R is less than or equal to L, which is the total number of TRPs supporting cooperative transmission.

For example, R is an integer greater than or equal to 1 and less than or equal to L.

For example, l=4, r=3.

Thus, the sixth information may be used to indicate that R TRPs corresponding to the R antenna port groups among the L TRPs are candidate TRPs, so that the selection range of the TRPs participating in the cooperative transmission may be narrowed.

Assuming that r=3, the sixth information indicates the antenna port group 0, the antenna port group 1, and the antenna port group 2, the TRP corresponding to the antenna port group 0, the TRP corresponding to the antenna port group 1, and the TRP corresponding to the antenna port group 2 are candidate TRPs.

Illustratively, the R reference signal resources are in one-to-one correspondence with the R TRPs. For the specific implementation of the reference signal resource, reference may be made to the corresponding description in S501, which is not repeated here.

Thus, the sixth information may be used to indicate that R TRPs corresponding to R reference signal resources among the L TRPs are candidate TRPs, so that the selection range of the TRPs participating in the cooperative transmission may be narrowed.

Optionally, the sixth information may be included in higher layer signaling, and the network device may inform the terminal device that R reference signal resources or R TRPs corresponding to R antenna port groups are candidate TRPs through the higher layer signaling.

For example, the sixth information may be included in RRC signaling, MAC CE signaling, or DCI.

In some embodiments, the method provided in the embodiments of the present application may further include: and S603, the network equipment determines sixth information according to the fifth information.

For the specific implementation of the fifth information, reference may be made to the corresponding description in S504, which is not repeated here. In this way, the network device obtains R reference signal resources or R TRPs corresponding to R antenna port groups according to existing prior information (e.g., information of an uplink channel) and may participate in the cooperative transmission, and the terminal device may further obtain the TRP participating in the cooperative transmission from the R TRPs.

Optionally, S603 above may include: the network device determines sixth information based on the second information and the fifth information.

For the specific implementation of the second information, reference may be made to the corresponding description in S504, which is not repeated here.

For example, the network device may select, from the L TRPs, a TRP having a larger R RSRP according to the RSRP to which the L TRPs correspond, which is not limited in the present application.

For another example, the network device may select, from the L TRPs, a TRP with a larger power corresponding to the R angle delay pair information according to the angle delay pair information corresponding to the L TRPs, which is not limited in this application.

For another example, the network device may select R TRPs from the L TRPs according to information of uplink channels to which the L TRPs correspond respectively.

In this way, the network device determines that the R TRPs are certain to participate in the cooperative transmission according to the existing prior information, so that the range of the terminal device for selecting the TRPs participating in the cooperative transmission can be reduced, the expenditure of the terminal device for reporting the TRPs participating in the cooperative transmission is reduced, and the processing complexity of the terminal device can be reduced.

In some embodiments, the sixth information may be predefined by the protocol.

Taking the antenna port group as an example, assuming r=3, the protocol may specify that TRPs corresponding to antenna port group 0, antenna port group 1, and antenna port group 2 are candidate TRPs.

In this way, the protocol predefines the range of the TRP that the terminal device selects to participate in the cooperative transmission, thereby reducing the overhead of the terminal device reporting the TRP that participates in the cooperative transmission, and also reducing the signaling overhead of the network device transmitting the sixth information to the terminal device.

S602, the terminal equipment sends seventh information to the network equipment. Accordingly, the network device receives seventh information from the terminal device.

The seventh information may be exemplarily determined by the terminal device according to the sixth information.

Illustratively, the seventh information may indicate Q reference signal resources, or Q antenna port groups.

For example, the seventh information may be used to indicate the number of Q reference signal resources, or the number of Q antenna port groups.

Illustratively, Q is less than or equal to R.

For example, Q is an integer less than or equal to R. Assuming r=3, q may be equal to 2.

Illustratively, the Q reference signal resources are in one-to-one correspondence with the Q cooperative TRPs.

Illustratively, the Q antenna port groups are in one-to-one correspondence with Q cooperative TRPs.

Illustratively, Q cooperative TRPs participate in cooperative transmission.

That is, the seventh information may be used to indicate Q cooperative TRPs corresponding to Q antenna port groups to simultaneously perform cooperative transmission, or the seventh information may be used to indicate Q cooperative TRPs corresponding to Q reference signal resources to simultaneously perform cooperative transmission.

For example, Q cooperative TRPs may be included in R TRPs.

As such, the protocol predefining or the network device determines that R TRPs may participate in the cooperative transmission, and the terminal device may determine Q TRPs participating in the cooperative transmission from the R TRPs.

Taking the antenna port group as an example, assuming that l=4, where the antenna port group 0 to the antenna port group 3 correspond to one TRP, and r=3, the sixth information indicates that the TRPs corresponding to the antenna port group 0, the antenna port group 1, and the antenna port group 2 may simultaneously use cooperative transmission to serve the terminal device, and the terminal device may select the TRPs participating in the coherent cooperative transmission from the TRPs corresponding to the antenna port group 0, the antenna port group 1, and the antenna port group 2. Assuming that the terminal device selects TRP corresponding to antenna port group 1 and antenna port group 2, the seventh information may indicate antenna port group 1 and antenna port group 2.

In this way, the protocol predefining or the network device determines that the R TRPs can participate in the cooperative transmission, so that the range of the TRPs which are selected by the terminal device to participate in the cooperative transmission is reduced, and the terminal device only needs to report which TRPs in the R TRPs are involved in the cooperative transmission, thereby reducing the cost of reporting the TRPs which are involved in the cooperative transmission by the terminal device, and also reducing the processing complexity of the terminal device.

In some embodiments, the seventh information may include a third field.

Optionally, the third field may be used to indicate that Q cooperative TRPs corresponding to the Q reference signal resources participate in cooperative transmission.

Or, optionally, the third field is used to indicate that Q cooperative TRPs corresponding to the Q antenna port groups participate in the cooperative transmission.

In some embodiments, the third field comprises a bit map.

In some embodiments, R bits may correspond one-to-one with R reference signal resources.

Optionally, the correspondence between R bits and R reference signal resources may satisfy a third rule, where the third rule includes: from left to right (or from right to left), the 1 st bit to the R bit of the R bits sequentially correspond to the number of the reference signal resource of the R reference signal resources from small to large. The third rule is similar to the first rule in S503, and reference may be made to the description of the first rule, which is not repeated here.

Assuming that l=4 and r=3, the reference signal resource 0 to the reference signal resource 3 correspond to one TRP, respectively, if the sixth information indicates the reference signal resource 0 to the reference signal resource 2, the bit length of the third field may be 3, and the 1 st bit to the 3 rd bit of the bit map correspond to the reference signal resource 0 to the reference signal resource 2, respectively. If the sixth information indicates the reference signal resource 0, the reference signal resource 2, and the reference signal resource 3, the bit length of the third field may be 3, the 1 st bit of the bit map may correspond to the reference signal resource 0, the 2 nd bit of the bit map may correspond to the reference signal resource 2, and the 3 rd bit of the bit map may correspond to the reference signal resource 3.

The specific implementation manner in which the R bits may correspond to the R reference signal resources one by one is similar to the one-to-one correspondence between the L-M bits and the L-M reference signal resources in S503, and will not be described herein.

For example, the specific definition of the bit corresponding to the reference signal resource with the value of 1 or 0 may be referred to the corresponding description in S503, and will not be repeated here.

Taking the numbers of the reference signal resources from the 1 st bit to the R bit in the R bits and the R reference signal resources from small to large as an example.

For example, assuming that l=4 and r=3, the reference signal resource 0 to the reference signal resource 3 respectively correspond to one TRP, the sixth information indicates that the reference signal resource 0 to the reference signal resource 2, the terminal device selects the TRP corresponding to the reference signal resource 0 and the reference signal resource 1 to perform cooperative transmission simultaneously, the third field may occupy 3 bits, the bit bitmap is 110, indicates that the TRP corresponding to the reference signal resource 0 and the TRP corresponding to the reference signal resource 1 perform cooperative transmission simultaneously, and the TRP corresponding to the reference signal resource 2 does not serve the terminal device or does not participate in the cooperative transmission.

In other embodiments, R bits may correspond one-to-one to R antenna port groups. The R bits may be similar to the R reference signal resources one-to-one.

Optionally, the correspondence between R bits and R antenna port groups may satisfy a fourth rule, where the fourth rule includes: from left to right (or from right to left), the 1 st bit to the R st bit of the R bits sequentially correspond to the numbers of the antenna port groups of the R antenna port groups from small to large. The third rule is similar to the second rule in S503, and reference may be made to the description of the second rule, which is not repeated here.

The specific implementation manner in which the R bits may correspond to the R antenna port groups one by one is similar to the one in which the L-M bits in S503 may correspond to the L-M antenna port groups one by one, which is not described herein.

For example, the specific definition of the bit corresponding to the antenna port group with the value of 1 or 0 may refer to the corresponding description in S503, and will not be repeated here.

Taking the serial numbers of the antenna port groups in the R antenna port groups from small to large as an example, the 1 st bit to the R bit in the R bits from left to right.

For example, assuming that l=4 and r=3, where the antenna port group 0 to the antenna port group 3 correspond to one TRP, the sixth information indicates that the antenna port group 0, the antenna port group 2, and the antenna port group 3 are selected by the terminal device to perform cooperative transmission simultaneously with the TRP corresponding to the antenna port group 2 and the antenna port group 3, the third field may occupy 3 bits, and the bit map is 011, which indicates that the TRP corresponding to the antenna port group 2 and the TRP corresponding to the antenna port group 3 perform cooperative transmission simultaneously, and that the TRP corresponding to the antenna port group 0 does not serve the terminal device or does not participate in cooperative transmission.

In this way, the protocol predefining or the network device predefines that R TRPs can participate in the cooperative transmission, so as to reduce the range of the TRPs that the terminal device selects to participate in the cooperative transmission, the terminal device only needs to report which TRPs of the remaining R TRPs participate in the cooperative transmission, and the terminal device only needs R bits to indicate the TRPs that participate in the cooperative transmission.

In some embodiments, the third field may include a transmission hypothesis.

Taking the antenna port group as an example, assuming that l=4 and r=3, the antenna port group 0 to the antenna port group 3 correspond to one TRP, respectively, the sixth information indicates the antenna port group 0, the antenna port group 1, and the antenna port group 2, and assuming that the terminal device can select 2 TRPs among the TRPs corresponding to the antenna port group 0 to the antenna port group 2, the transmission is assumed to have 3 types, for example (antenna port group 0, antenna port group 1), (antenna port group 0, antenna port group 2), (antenna port group 1, and line port group 2), and the bit length of the third field may be 2 bits.

For example, the third field is 00, which may indicate that TRP corresponding to antenna port group 0 and antenna port group 1 perform cooperative transmission at the same time; the third field is 01, and can indicate the TRP corresponding to the antenna port group 0 and the antenna port group 2 to perform cooperative transmission at the same time; the third field is 10, which may indicate that TRP corresponding to the antenna port group 1 and the line port group 2 perform cooperative transmission at the same time.

Assuming that the terminal device selects the TRP corresponding to the antenna port group 0 and the TRP corresponding to the antenna port group 1 and simultaneously adopts the cooperative transmission mode to provide the service for the terminal device, the third field is 00, and the bit length of the third field is 2 bits. Compared with the above example 1 in which the 2 TRPs are required to be reported to the network device by the terminal device by using 3 bits, in the method shown in fig. 6, the protocol is predefined or the network device determines the candidate TRPs to participate in the cooperative transmission in advance, and the terminal device can indicate the 2 TRPs to participate in the cooperative transmission by using only 2 bits, so that the cost of reporting the TRPs to participate in the cooperative transmission by the terminal device can be reduced, and the complexity of processing by the terminal device can be reduced.

Alternatively, assuming that the terminal device transmits 2 transmission hypotheses out of the 3 transmission hypotheses to the network device, selecting, by the network device, TRP participating in cooperative transmission from the 2 transmission hypotheses, 3 possibilities for selecting 2 transmission hypotheses out of the 3 transmission hypotheses, a bit length of a third field may be 2 bits, for example, the third field may be 00, and may indicate transmission hypotheses (antenna port group 0, antenna port group 1) and (antenna port group 0, antenna port group 2); a third field of 01, which may indicate transmission hypotheses (antenna port group 0, antenna port group 1) and (antenna port group 0, antenna port group 3); the third field is 10, which may indicate transmission hypotheses (antenna port group 0, antenna port group 2) and (antenna port group 0, antenna port group 3). In the method shown in fig. 6, the protocol is predefined or the network device determines the candidate TRP participating in the cooperative transmission in advance, and the terminal device can instruct 2 transmission hypotheses out of 3 transmission hypotheses by using only 2 bits, so that the cost of the terminal device reporting the TRP participating in the cooperative transmission can be reduced, and the complexity of the terminal device processing can be reduced, compared with the case that the terminal device needs to use 4 bits to instruct 2 transmission hypotheses out of 6 transmission hypotheses in the case of the cooperative transmission in the above example 2.

In some embodiments, the third field may be configured in Part1 (Part 1) information of the third information.

Illustratively, the seventh information may include part1 information, and the part1 information may include a third field.

Optionally, the seventh information may further include part 2 information.

For the specific implementation of the part1 information and the part 2 information, reference may be made to the corresponding descriptions in S503, which are not repeated here.

In some embodiments, if Q is equal to R, the seventh information may not include the third field.

For example, in a case where both candidate TRPs participate in the cooperative transmission, the terminal device may not indicate the TRP participating in the cooperative transmission, and the seventh information excluding the third field may implicitly indicate that both candidate TRPs participate in the cooperative transmission.

In some embodiments, the seventh information may be included in the uplink control information UCI.

For example, the network device may transmit seventh information to the terminal device through UCI, which may include seventh information.

Based on the method shown in fig. 6, the protocol predefining or the network device predefines that R reference signal resources or R TRPs corresponding to R antenna port groups can participate in the cooperative transmission, and the terminal device selects the TRPs participating in the cooperative transmission from the R TRPs, so that the range of the TRPs selected by the terminal device to participate in the cooperative transmission is reduced, and the terminal device only needs to report which TRPs of R TRPs corresponding to R reference signal resources or R antenna port groups participate in the cooperative transmission, so that the cost of reporting the TRPs participating in the cooperative transmission by the terminal device can be reduced, and the processing complexity of the terminal device can be reduced.

In order to make the embodiments of the present application clearer, some of the content and concepts related to the embodiments of the present application are described below.

The three-level codebook structure corresponding to R16 TypeII and R17 TypeII is that

For the R16 TypeII codebook, W ₁ ∈N ^P×2S For the spatial selection matrix, 2S beams are selected from the P spatial beams.Is a frequency domain compressed matrix representing V columns, N selected from a set of discrete Fourier transform (discrete fourier transform, DFT) matrices ₃ Is the number of frequency domain Resource Blocks (RBs) resources or the number of subbands. W (W) ₂ ∈C ^2S×V Is a combined coefficient quantized according to a quantization criterion.

For the R17 TypeII PS codebook,selecting a matrix for the ports, representing selecting K from among the P ports ₁ And a plurality of ports. />Is a frequency domain compressed matrix representing M columns selected from the DFT matrix set. N (N) ₃ The number of the frequency domain RB resources or the number of the sub-bands; />Is a combined coefficient quantized according to a quantization criterion.

After the terminal equipment completes channel measurement, measurement information needs to be reported in UCI, specifically including a selected airspace/port (W ₁ ) Frequency domain vector indication (W _f ) Weighting system corresponding to space domain/port and frequency domain vectorNumber and weighting coefficient (W ₂ ) And parameters such as the position of the codebook.

For the R16 NP codebook, the protocol-specified codebook parameter list combinations are shown in Table 1.

TABLE 1

In table 1, S is the number of spatial bases (or spatial basis vectors) selected for a single polarization direction,is the number of frequency domain bases (or frequency domain basis vectors) selected. F represents the number of PMI subbands included in each CQI subband, and is configured by a higher layer. N (N) ₃ Representing the number of PMI sub-bands, v representing the number of corresponding columns (rank), beta being the proportion of the non-zero projection coefficient selected by each layer to the maximum possible non-zero projection coefficient of each layer, the number of the maximum possible non-zero coefficients reported by each layer being->

In the CSI measurement process, the network device issues configuration information to the terminal device, indicating which set of parameters in the codebook parameter list (table 1) is used by the terminal device. For example, the network device indicates which set of parameters the terminal device uses through 3 bits, and if the configuration information issued by the network device indicates 100, the corresponding number of the issued codebook parameters is indicated as 5. The terminal equipment determines the number of nonzero projection coefficients to be reported and the number of the selected airspace substrates and the frequency domain substrates according to the indication of the network equipment, and reports the selected nonzero projection coefficients to the network equipment, and simultaneously reports the bitmap of the nonzero projection coefficients, the indication information of the selected airspace substrates and the indication information of the frequency domain substrates. The network equipment reconstructs a channel matrix or a precoding matrix according to the non-zero projection coefficient, the bitmap of the non-zero projection coefficient, the indicating information of the airspace substrate and the indicating information of the frequency domain substrate, which are reported by the terminal equipment.

For the R17 PS codebook, the protocol-specified codebook parameter list combinations are shown in table 2.

TABLE 2

In Table 2, α represents the port selection scaling factor, K ₁ Is the number of ports selected and K ₁ ＝αP _CSI-RS . V is the number of selected frequency domain bases (or frequency domain base vectors), beta is the ratio of the selected non-zero projection coefficients per layer to the maximum possible non-zero projection coefficients per layer, the number of the maximum possible non-zero coefficients reported per layer is

In the CSI measurement process, the network device issues configuration information to the terminal device, which group of parameters in the codebook parameter list (table 2) is indicated to be used by the terminal device, for example, the network device indicates which group of parameters is used by the terminal device through 3 bits, and if the configuration information issued by the network device indicates 100, it is indicated that the issued codebook parameter corresponds to number 5. The terminal equipment determines the number of the non-zero projection coefficients to be reported, the number of the selected ports and the number of the frequency domain substrates according to the indication of the network equipment, and reports the selected non-zero projection coefficients to the network equipment, and simultaneously reports the bitmap of the non-zero projection coefficients, the indication information of the selected ports and the indication information of the frequency domain substrates. The network equipment reconstructs a channel matrix or a precoding matrix according to the non-zero projection coefficient, the bitmap of the non-zero projection coefficient, the indication information of the selected port and the indication information of the frequency domain substrate, which are reported by the terminal equipment.

A scheme for solving the waste of reserved resources is explained as follows.

The resources reserved by the network device are determined according to the codebook parameter combinations issued by the network device, so that different codebook parameter combinations issued by the network device are considered to correspond to the reporting overheads of different cooperative TRPs.

Illustratively, when engaged in collaborationWhen the number N of transmitted TRPs is less than or equal to 2, the corresponding coefficient beta ₁ The method comprises the steps of carrying out a first treatment on the surface of the When the number N of TRPs participating in cooperative transmission is more than 2, the corresponding coefficient beta ₂ ，β ₁ Representing the proportion of the selected non-zero projection coefficient per layer to the maximum possible non-zero projection coefficient per layer, beta ₂ Representing the proportion of non-zero projection coefficients selected for each layer to the maximum possible non-zero projection coefficients for each layer. Alternatively, N may be equal to y+m (the meaning indicated by Y, M may be as set forth in the method shown in fig. 5), N may be replaced with y+m, or N may be replaced with Q (the meaning indicated by Q may be as set forth in the method shown in fig. 6).

For example, taking R16 as an example, assuming that the number of spatial substrates allocated to each TRP is s=2, the number of frequency domain substrates allocated to each TRP is v=4, and the number of TRP involved in cooperative transmission is n=2, β corresponds to ₁ =1/2; corresponding beta when the number of TRPs participating in cooperative transmission is N=4 ₂ When the number of TRPs participating in cooperative transmission is n=2, the total number of maximum possible non-zero projection coefficients per layer is When the number of TRPs participating in cooperative transmission is N=4, the total number of maximum possible non-zero projection coefficients per layer is +.>

Therefore, the corresponding relation exists between the TRP number and the beta value, the different TRP numbers participating in the cooperative transmission can correspond to different beta values, for example, the beta value when N is less than or equal to 2 is twice the beta value when N is more than 2, under the condition that other parameters are unchanged, beta can be adjusted according to the TRP number participating in the cooperative transmission to control the overhead reported by the terminal equipment, the overhead reported by the terminal equipment is ensured to be similar or identical to the overhead reserved by the network equipment according to the codebook parameter combination, the reporting overhead reserved by the network equipment is not exceeded, and the reporting overhead reserved by the network equipment is not far smaller than the reporting overhead reserved by the network equipment.

Or, when the codebook parameter combination indicated by the network device is determined, for example, for the collaborative transmission cqt codebook enhanced by the R16 TypeII codebook, for example, the total number of spatial domain substrates indicated by the network device is S, the number of frequency domain substrates is V, and the coefficient is β, if the number of frequency domain substrates of each TRP is fixed, the total number of spatial domain substrates indicated by the network device may be allocated between different TRPs, so long as the sum of the number of spatial domain substrates of different TRPs does not exceed the total number of spatial domain substrates indicated by the network device.

Similarly, for a collaborative transmission CJT codebook enhanced with an R17 TypeII codebook, for example, the total port number indicated by the network device is K ₁ And if the number of the frequency domain substrates corresponding to each TRP is V and the coefficient is beta, the total port number can be distributed among different TRPs under the condition that the number of the frequency domain substrates of each TRP is fixed, so long as the sum of the port numbers of the different TRPs does not exceed the total port number indicated by the network equipment.

Take the example of the collaborative transmission CJT codebook enhanced with the R16 TypeII codebook. Assuming that the network device indicates the total number of spatial substrates s=10 to the terminal device, the number of frequency domain substrates allocated to each TRP is v=4, β=1/2, if the number of TRPs participating in cooperative transmission n=3, 3 spatial substrates may be allocated to 2 TRPs of the 3 TRPs respectively, and 4 spatial substrates may be allocated to the remaining 1 TRPs respectively. If the number of TRPs involved in cooperative transmission is n=2, 5 spatial base stations may be allocated to 2 TRPs, respectively. Then, when the number of TRP involved in cooperative transmission is n=3, the total number of maximum possible non-zero projection coefficients per layer is When the number of TRP participating in cooperative transmission is N=2, the total number of maximum possible non-zero projection coefficients of each layer is +.>

Therefore, the reporting cost of the terminal equipment is close to or identical with the reporting cost reserved by the network equipment, and the reporting cost does not exceed the reporting cost reserved by the network equipment and is not far smaller than the reporting cost reserved by the network equipment.

Optionally, the network device sends the total number of spatial domain bases, the number of frequency domain bases corresponding to each TRP, and the coefficient β to the terminal device, or the network device sends the total number of ports, the number of frequency domain bases corresponding to each TRP, and the coefficient β to the terminal device. Alternatively, this may be performed before S501 described above.

Alternatively, the above ports may also be referred to as reference signal ports, antenna ports, CSI-RS ports, which are not limited in this application.

Throughout this application, unless specifically stated otherwise, identical or similar parts between the various embodiments may be referred to each other. In the various embodiments and the various implementation/implementation methods in the various embodiments in this application, if no special description and logic conflict exist, terms and/or descriptions between different embodiments and between the various implementation/implementation methods in the various embodiments may be consistent and may be mutually referred to, technical features in the different embodiments and the various implementation/implementation methods in the various embodiments may be combined to form new embodiments, implementations, implementation methods, or implementation methods according to their inherent logic relationships. The embodiments of the present application described below do not limit the scope of the present application.

The method for indicating the cooperative transmission receiving point provided in the embodiment of the present application is described in detail above with reference to fig. 1 to 6. The following describes in detail the communication device provided in the embodiment of the present application with reference to fig. 7 and 8.

Fig. 7 is a schematic structural diagram of another communication device according to an embodiment of the present application. The communication device is applicable to the communication system shown in fig. 1, and for convenience of explanation, fig. 7 shows only main components of the communication device. As shown in fig. 7, the communication apparatus 700 includes: the sending module 701 and the processing module 703 may further comprise a receiving module 702.

In one possible embodiment, the communication device 700 shown in fig. 7 may be applied to the system shown in fig. 1, and perform the functions of the terminal device in the method shown in fig. 5.

The processing module 703 is configured to obtain the first information. The processing module 703 is further configured to determine Y cooperative TRPs according to the first information and the second information. A sending module 701, configured to send the third information to the network device. The first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, the M TRPs are cooperative TRPs, and the M is an integer greater than or equal to 1. The second information indicates that the total number of TRPs supporting cooperative transmission is L, Y cooperative TRPs are included in L-M TRPs, L-M TRPs are TRPs other than M TRPs among the L TRPs, L is an integer greater than 1, M is an integer greater than or equal to 1 and less than L, and Y is an integer greater than or equal to 1 and less than L-M. The third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, and the Y antenna port groups are in one-to-one correspondence with the Y cooperative TRPs.

It should be noted that, the receiving module 702 and the transmitting module 701 may be separately disposed, or may be integrated into one module, i.e., a transceiver module (not shown in fig. 7). The specific implementation manner of the receiving module 702 and the sending module 701 is not specifically limited in this application.

Optionally, the communication device 700 may further comprise a processing module 703 and a storage module (not shown in fig. 7), which stores programs or instructions. The processing module 703, when executing the program or instructions, enables the communication apparatus 700 to perform the functions of the terminal device in the method shown in fig. 5.

The communication device 700 may be a terminal device, or may be a chip (system) or other components or assemblies that may be provided in the terminal device, which is not limited in this application.

In addition, the technical effects of the communication apparatus 700 may refer to the technical effects of the method shown in fig. 5, and will not be described herein.

Fig. 8 is a schematic structural diagram of still another communication device according to an embodiment of the present application. The communication device is applicable to the communication system shown in fig. 1, and for convenience of explanation, fig. 8 shows only the main components of the communication device. As shown in fig. 8, the communication apparatus 800 includes: the transmitting module 801 and the receiving module 802 may further include a processing module 803.

In one possible design, the communication device 800 shown in fig. 8 may be adapted to the system shown in fig. 1 to perform the functions of the network device in the method described above with respect to fig. 5.

Wherein, the sending module 801 is configured to send the first information to the terminal device. A receiving module 802, configured to receive third information from the terminal device. The sending module is used for sending the first information to the terminal equipment. And the receiving module is used for receiving the third information from the terminal equipment. The first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, the M TRPs are cooperative TRPs, and the M is an integer greater than or equal to 1. The third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, the Y antenna port groups are in one-to-one correspondence with Y cooperative TRPs, the Y cooperative TRPs are contained in L-M TRPs, the L-M TRPs are M TRPs except for M TRPs corresponding to the M reference signal resources or M TRPs corresponding to the M antenna port groups in the L TRPs, L is the total number of TRPs supporting cooperative transmission, L is an integer greater than 1, M is an integer greater than or equal to 1 and smaller than L, and Y is an integer greater than or equal to 1 and smaller than L-M.

It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

It should be noted that, the receiving module 802 and the transmitting module 801 may be separately provided, or may be integrated into one module, i.e., a transceiver module (not shown in fig. 8). The specific implementation manner of the receiving module 802 and the transmitting module 801 is not specifically limited in this application.

Optionally, the communication device 800 may further comprise a processing module 803 and a storage module (not shown in fig. 8), which stores programs or instructions. The processing module 803, when executing the program or instructions, enables the communications apparatus 800 to perform the functions of the network device in the method illustrated in fig. 5.

The communication device 800 may be a network device, or may be a chip (system) or other components or assemblies that may be provided in the network device, which is not limited in this application.

In addition, the technical effects of the communication apparatus 800 may refer to the technical effects of the method shown in fig. 5, which are not described herein.

In one possible embodiment, the communication device 800 shown in fig. 8 may be adapted to the system shown in fig. 1, and perform the functions of the terminal device in the method described above with reference to fig. 6.

Wherein, the receiving module 802 is configured to receive sixth information from the network device. A sending module 801, configured to send seventh information to a network device. And the receiving module is used for receiving the sixth information from the network equipment. And the sending module is used for sending the seventh information to the network equipment. The sixth information is used for indicating R reference signal resources or R antenna port groups, one of the R antenna port groups comprises one or more antenna ports, the R reference signal resources are in one-to-one correspondence with R transmission and reception points TRP, the R antenna port groups are in one-to-one correspondence with R TRPs, the R TRPs are candidate cooperative TRPs, the R is smaller than the L, and the L is the total number of the TRPs supporting cooperative transmission. The seventh information is determined according to the sixth information, the seventh information indicating Q reference signal resources or Q antenna port groups, Q being less than or equal to R, the Q reference signal resources being in one-to-one correspondence with Q cooperative TRPs, the Q antenna port groups being in one-to-one correspondence with Q cooperative TRPs, the Q cooperative TRPs being included in the R TRPs.

Optionally, the communication device 800 may further comprise a processing module 803 and a storage module (not shown in fig. 8), which stores programs or instructions. The processing module 803, when executing the program or instructions, enables the communication apparatus 800 to perform the functions of the terminal device in the method shown in fig. 6.

The communication device 800 may be a terminal device, or may be a chip (system) or other components or assemblies that may be provided in the terminal device, which is not limited in this application.

In addition, the technical effects of the communication apparatus 800 may refer to the technical effects of the method shown in fig. 6, and will not be described herein.

In one possible design, the communication device 800 shown in fig. 8 may be adapted to the system shown in fig. 1 to perform the functions of the network device in the method described above with respect to fig. 6.

Wherein, the sending module 801 is configured to send sixth information to the terminal device. A receiving module 802, configured to receive seventh information from the terminal device. And the sending module is used for sending the sixth information to the terminal equipment. And the receiving module is used for receiving the seventh information from the terminal equipment. The sixth information is used for indicating R reference signal resources or R antenna port groups, one of the R antenna port groups comprises one or more antenna ports, the R reference signal resources are in one-to-one correspondence with R transmission and reception points TRP, the R antenna port groups are in one-to-one correspondence with R TRPs, the R TRPs are candidate cooperative TRPs, the R is smaller than the L, and the L is the total number of the TRPs supporting cooperative transmission. The seventh information indicates Q reference signal resources, or Q antenna port groups, Q being less than or equal to R, the Q reference signal resources being in one-to-one correspondence with Q cooperative TRPs, the Q antenna port groups being in one-to-one correspondence with the Q cooperative TRPs, the Q cooperative TRPs being included in the R TRPs.

Optionally, the communication device 800 may further comprise a processing module 803 and a storage module (not shown in fig. 8), which stores programs or instructions. The processing module 803, when executing the program or instructions, enables the communications apparatus 800 to perform the functions of the network device in the method illustrated in fig. 6.

The embodiment of the application provides a communication system. The communication system includes a terminal device and a network device. The specific execution method and process of the actions of the network device for executing the actions of the network device in the method embodiment may refer to the method embodiment, and are not repeated herein.

Embodiments of the present application provide a chip system including logic circuitry and input/output ports. The logic circuit may be used to implement a processing function related to the method provided by the embodiment of the application, and the input/output port may be used to send and receive a signal related to the method provided by the embodiment of the application.

Illustratively, the input port may be used to implement a receiving function related to the method provided by the embodiment of the present application, and the output port may be used to implement a transmitting function related to the method provided by the embodiment of the present application.

In one possible design, the system-on-chip also includes a memory to store program instructions and data that implement the functions involved in the methods provided by the embodiments of the present application.

The present embodiments provide a computer readable storage medium storing a computer program or instructions that, when run on a computer, cause a method provided by the embodiments of the present application to be performed.

Embodiments of the present application provide a computer program product comprising: computer programs or instructions which, when run on a computer, cause the methods provided by the embodiments of the present application to be performed.

It should be appreciated that the processor in embodiments of the present application may be a central processing unit (central processing unit, CPU), which may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, RAM) are available, such as Static RAM (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware (e.g., circuitry), firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for indicating a cooperative transmission receiving point, comprising:

the terminal equipment acquires first information; the first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with the M TRPs, and the M TRPs are cooperative TRPs;

the terminal equipment determines Y cooperative TRPs according to the first information and the second information; wherein the second information is used to indicate that the total number of TRPs supporting cooperative transmission is L, the Y cooperative TRPs are included in L-M TRPs, the L-M TRPs are TRPs other than the M TRPs among the L TRPs, L is an integer greater than 1, M is an integer greater than or equal to 1 and less than L, and Y is an integer greater than or equal to 1 and less than L-M;

The terminal equipment sends third information to the network equipment; the third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with the Y cooperative TRPs, and the Y antenna port groups are in one-to-one correspondence with the Y cooperative TRPs.

2. The method of claim 1, wherein the terminal device determining Y cooperative TRPs from the first information and the second information, comprises:

the terminal equipment acquires fourth information;

the terminal equipment determines Y collaborative TRPs according to the first information, the second information and the fourth information; wherein the fourth information is used to indicate that the total number of TRPs actually participating in cooperative transmission is N, Y is equal to N-M, and N is an integer greater than 1 and less than or equal to L.

3. The method according to claim 1 or 2, wherein the third information comprises a first field for indicating the Y cooperative TRPs corresponding to the Y reference signal resources or the Y cooperative TRPs corresponding to the Y antenna port groups.

4. The method of claim 3, wherein the first field comprises a bit map or a transmission hypothesis.

5. The method according to claim 1 or 2, wherein the third information comprises a second field for indicating the M TRPs corresponding to the M reference signal resources and the Y cooperative TRPs corresponding to the Y reference signal resources; or, the second field is used to indicate the M TRPs corresponding to the M antenna port groups and the Y cooperative TRPs corresponding to the Y antenna port groups.

6. The method of claim 5, wherein the second field comprises a transmission hypothesis.

7. The method according to any of claims 1-6, wherein the terminal device obtaining the first information comprises:

the terminal equipment receives the first information from the network equipment; the first information is included in radio resource control RRC signaling, medium access control MAC control element CE signaling, or downlink control information DCI.

8. The method according to any of claims 1-7, characterized in that the third information is contained in an uplink control information, UCI.

9. The method according to any of claims 1-8, wherein the second information is predefined for a protocol.

10. The method according to any of claims 2-9, wherein the terminal device obtains fourth information, comprising:

the terminal equipment receives the fourth information from the network equipment;

the fourth information is included in RRC signaling, MAC CE signaling, or DCI.

11. The method according to any one of claims 1-10, wherein L is equal to 4.

12. A method for indicating a cooperative transmission receiving point, comprising:

the network equipment sends first information to the terminal equipment; the first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, and the M TRPs are cooperative TRPs;

the network equipment receives third information from the terminal equipment; the third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, the Y antenna port groups are in one-to-one correspondence with Y cooperative TRPs, the Y cooperative TRPs are contained in L-M TRPs, the L-M TRPs are TRPs except the M TRPs, L is the total number of TRPs supporting cooperative transmission, L is an integer greater than 1, M is an integer greater than or equal to 1 and less than L, and Y is an integer greater than or equal to 1 and less than L-M.

13. The method of claim 12, wherein Y is equal to N-M, N is a total number of TRPs actually involved in cooperative transmission, and N is an integer greater than 1 and less than or equal to L.

14. The method according to claim 12 or 13, wherein the third information comprises a first field for indicating the Y cooperative TRPs corresponding to the Y reference signal resources or the Y cooperative TRPs corresponding to the Y antenna port groups.

15. The method of claim 14, wherein the first field comprises a bit map or a transmission hypothesis.

16. The method according to claim 12 or 13, characterized in that the third information comprises a second field for indicating the M TRPs corresponding to the M reference signal resources and the Y cooperative TRPs corresponding to the Y reference signal resources; or, the second field is used to indicate the M TRPs corresponding to the M antenna port groups and the Y cooperative TRPs corresponding to the Y antenna port groups.

17. The method of claim 16, wherein the second field comprises a transmission hypothesis.

18. The method according to any one of claims 12-17, further comprising:

the network equipment determines the first information according to fifth information; wherein the fifth information includes one or more of: information of an uplink channel, reference signal receiving power and angle delay pair information.

19. The method according to any of claims 12-18, wherein the first information is comprised in radio resource control, RRC, signaling, medium access control, MAC, control element, CE, signaling, or downlink control information, DCI.

20. The method according to any of claims 12-19, characterized in that the third information is contained in an uplink control information, UCI.

21. The method according to any one of claims 12-20, further comprising:

the network equipment sends fourth information to the terminal equipment; wherein the fourth information is used to indicate that the total number of TRPs actually participating in the cooperative transmission is N, and the fourth information is included in RRC signaling, MAC CE signaling, or DCI.

22. The method according to any one of claims 12-21, wherein L is equal to 4.

23. A communication device, characterized in that the communication device comprises a processing module and a transmitting module;

the processing module is used for acquiring first information; the first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with the M TRPs, and the M TRPs are cooperative TRPs;

the processing module is further used for determining Y cooperative TRPs according to the first information and the second information; wherein the second information is used to indicate that the total number of TRPs supporting cooperative transmission is L, the Y cooperative TRPs are included in L-M TRPs, the L-M TRPs are TRPs other than the M TRPs among the L TRPs, L is an integer greater than 1, M is an integer greater than or equal to 1 and less than L, and Y is an integer greater than or equal to 1 and less than L-M;

the sending module is used for sending third information to the network equipment; the third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with the Y cooperative TRPs, and the Y antenna port groups are in one-to-one correspondence with the Y cooperative TRPs.

24. The apparatus of claim 23, wherein the device comprises a plurality of sensors,

the processing module is further used for acquiring fourth information;

the processing module is further configured to determine the Y cooperative TRPs according to the first information, the second information, and the fourth information; wherein the fourth information is used to indicate that the total number of TRPs actually participating in cooperative transmission is N, Y is equal to N-M, and N is an integer greater than 1 and less than or equal to L.

25. The apparatus according to claim 23 or 24, wherein the third information comprises a first field for indicating the Y cooperative TRPs corresponding to the Y reference signal resources or the Y cooperative TRPs corresponding to the Y antenna port groups.

26. The apparatus of claim 25, wherein the first field comprises a bit map or a transmission hypothesis.

27. The apparatus according to claim 23 or 24, wherein the third information comprises a second field for indicating the M TRPs corresponding to the M reference signal resources and the Y cooperative TRPs corresponding to the Y reference signal resources; or, the second field is used to indicate the M TRPs corresponding to the M antenna port groups and the Y cooperative TRPs corresponding to the Y antenna port groups.

28. The apparatus of claim 27, wherein the second field comprises a transmission hypothesis.

29. The apparatus according to any one of claims 23-28, wherein said communication apparatus further comprises: a receiving module; the receiving module is configured to receive the first information from the network device; the first information is included in radio resource control RRC signaling, medium access control MAC control element CE signaling, or downlink control information DCI.

30. The apparatus according to any of claims 23-29, characterized in that the third information is contained in an uplink control information UCI.

31. The apparatus according to any of claims 23-30, wherein the second information is predefined for a protocol.

32. The apparatus according to any one of claims 24-31, wherein said communication means further comprises: a receiving module; wherein the receiving module is configured to receive the fourth information from the network device; the fourth information is included in RRC signaling, MAC CE signaling, or DCI.

33. The apparatus of any one of claims 23-32, wherein L is equal to 4.

34. A communication device, comprising a transmitting module and a receiving module;

the sending module is used for sending first information to the terminal equipment; the first information is used for indicating M reference signal resources or M antenna port groups, one antenna port group in the M antenna port groups comprises one or more antenna ports, the M reference signal resources are in one-to-one correspondence with M transmission and reception points TRP, the M antenna port groups are in one-to-one correspondence with M TRPs, and the M TRPs are cooperative TRPs;

the receiving module is used for receiving third information from the terminal equipment; the third information is used for indicating Y reference signal resources or Y antenna port groups, the Y reference signal resources are in one-to-one correspondence with Y cooperative TRPs, the Y antenna port groups are in one-to-one correspondence with Y cooperative TRPs, the Y cooperative TRPs are contained in L-M TRPs, the L-M TRPs are TRPs except the M TRPs, L is the total number of TRPs supporting cooperative transmission, L is an integer greater than 1, M is an integer greater than or equal to 1 and less than L, and Y is an integer greater than or equal to 1 and less than L-M.

35. The apparatus of claim 34, wherein Y is equal to N-M, N is a total number of TRPs actually involved in cooperative transmission, and N is an integer greater than 1 and less than or equal to L.

36. The apparatus according to claim 34 or 35, wherein the third information comprises a first field for indicating the Y cooperative TRPs corresponding to the Y reference signal resources or the Y cooperative TRPs corresponding to the Y antenna port groups.

37. The apparatus of claim 36, wherein the first field comprises a bit map or a transmission hypothesis.

38. The apparatus according to claim 34 or 35, wherein the third information comprises a second field for indicating the M TRPs corresponding to the M reference signal resources and the Y cooperative TRPs corresponding to the Y reference signal resources; or, the second field is used to indicate the M TRPs corresponding to the M antenna port groups and the Y cooperative TRPs corresponding to the Y antenna port groups.

39. The apparatus of claim 38, wherein the second field comprises a transmission hypothesis.

40. The apparatus of any one of claims 34-39, wherein the communication apparatus further comprises: a processing module; the processing module is used for determining the first information according to fifth information; wherein the fifth information includes one or more of: information of an uplink channel, reference signal receiving power and angle delay pair information.

41. The apparatus according to any of claims 34-40, wherein the first information is comprised in radio resource control, RRC, signaling, medium access control, MAC, control element, CE, signaling, or downlink control information, DCI.

42. The apparatus of any one of claims 34-41, wherein the third information is included in uplink control information UCI.

43. The apparatus according to any one of claims 34-42, wherein the sending module is further configured to send fourth information to the terminal device; wherein the fourth information is used to indicate that the total number of TRPs actually participating in the cooperative transmission is N, and the fourth information is included in RRC signaling, MAC CE signaling, or DCI.

44. The apparatus of any one of claims 34-43, wherein L is equal to 4.

45. A communication device, the communication device comprising: a processor; the processor configured to perform the method of any one of claims 1-22.

46. A communication device, the communication device comprising: a processor and a memory, the processor coupled with the memory;

the memory is used for storing a computer program;

the processor configured to execute the computer program stored in the memory to cause the communication method according to any one of claims 1 to 22 to be performed.

47. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program or instructions, which, when run on a computer, cause the method of any one of claims 1-22 to be performed.

48. A computer program product, the computer program product comprising: computer program or instructions which, when run on a computer, cause the method of any one of claims 1-22 to be performed.