Channel state information reporting method and device

Abstract

The invention discloses a channel state information reporting method and a channel state information reporting device, which are used for solving the problem that the system performance is reduced. Specifically, different port groups of the same CSI-RS resource configured to the terminal equipment can be associated with different TCI states, or different resources, belonging to the same resource group, configured to the terminal equipment are associated with different TCI states, or different CSI report configurations configured to the terminal equipment are associated with different TRP. When the terminal equipment performs channel measurement on the resources associated with different TCI states, the two TRPs are assumed to provide services for the terminal equipment, so that the influence on the system performance is reduced. Different resources (such as port groups, CSI-RS resources and resource sets) associated with different TCI states can occupy different time units, and enough time is provided for beam switching of the terminal equipment.

Description

[0001] This application is a divisional application. The original application has the application number 202080106355.2 and the original application date is October 23, 2020. The entire contents of the original application are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a method and apparatus for reporting channel state information. Background Technology

[0003] In New Radio (NR) systems, multiple transmission reception points (TRPs) can be used to improve downlink performance. Specifically, two TRPs can simultaneously provide data transmission services to the same user equipment (UE). In terms of implementation, current communication standards provide two transmission methods: one based on multiple downlink control information (DCI) and the other based on a single DCI.

[0004] In the multi-DCI-based transmission mode, each of the two TRPs sends a DCI to the UE. The DCI is used to schedule the Physical Downlink Shared Channel (PDSCH) to send service data to the UE. In the single-DCI-based transmission mode, both TRPs use the same DCI to schedule the same PDSCH to send service data to the UE. One TRP occupies a portion of the layer or demodulation reference signal (DMRS) ports in the PDSCH, while the other TRP occupies the remaining layer or DMRS ports.

[0005] The TRP sends DCI to the UE based on the CSI measurement results reported by the UE to schedule PDSCH. Currently, the UE's CSI reporting and measurement does not take into account the situation of multiple TRPs, which may lead to deviations in CSI measurement results and cause a decrease in system performance. Summary of the Invention

[0006] This application provides a method and apparatus for reporting channel state information to solve the problem of system performance degradation caused by deviations in measurement results.

[0007] Firstly, embodiments of this application provide a channel state information reporting method. This method can be applied to a communication device, which may be a terminal device, or a chip or chip system within the terminal device. Taking a terminal device as an example, the terminal device receives channel state information—reference signal (CSI-RS) resource configuration information—from a network device. The CSI-RS resource configuration information includes a set of CSI-RS resources, which includes at least a first CSI-RS resource. A first port group corresponding to the first CSI-RS resource is associated with a first transmission configuration indication state, and a second port group corresponding to the first CSI-RS resource is associated with a second transmission configuration indication state. The first port group includes at least one port, and the second port group includes at least one port. The identifiers of the ports included in the first port group and the ports included in the second port group are different. Further, the terminal device performs CSI measurements based on the CSI-RS resource configuration information and then reports the CSI to the network device. Through the above method, when the terminal device performs channel measurements on CSI-RS resources associated with different transmission configuration indications, it assumes that both TRPs are providing services to it, reducing the deviation of the measurement results and reducing the impact on system performance.

[0008] In one possible design, the CSI-RS resource set further includes a second CSI-RS resource, the port corresponding to the second CSI-RS resource being associated with a third transmission configuration indication state; CSI includes a first measurement result obtained by performing CSI measurements on the CSI-RS resources in the CSI-RS resource set, the first measurement result including a first CSI parameter and a second CSI parameter; wherein, the first CSI parameter includes a first channel state information-reference signal resource indication (CRI), the CSI-RS resource indicated by the first CRI is the first CSI-RS resource, and the other CSI parameters in the first CSI parameter besides the first CRI are determined on the first CSI-RS resource; wherein, the second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the second CSI-RS resource, and the other CSI parameters in the second CSI parameter besides the second CRI are determined on the second CSI-RS resource. Through the above scheme, the CSI reported by the terminal device includes two parts. When the terminal device measures CSI based on a CSI-RS resource associated with two TCI states, it actually assumes that two TRPs are simultaneously serving it, which can obtain better CSI measurement results. When using multi-TRP scheduling, this prevents interference between transmissions of different TRPs. Furthermore, the measurement results assuming that two TRPs are simultaneously serving the terminal device better reflect the overall channel state between the two TRPs and the terminal device, improving system performance. The terminal device also measures CSI on a CSI-RS resource associated with one TCI-state, which can reflect the channel state between one TRP and the terminal device, increasing the possibility of the terminal device using single-TRP scheduling.

[0009] In one possible design, ports in the first port group belong to a first Code Division Multiple Access (CDM) group set, which contains one or more CDM groups; the first CDM group set is associated with a first Transport Configuration Indication (TCI) state. Ports in the second port group belong to a second CDM group set, which contains one or more CDM groups; the second CDM group set is associated with a second TCI state. The identifiers of the CDM groups in the first and second CDM group sets are different. In this design, distinguishing which IRP is associated using CDM groups is simple and effective.

[0010] In one possible design, the first CSI-RS resource includes J CDM groups, where J is an integer greater than 1; the first CDM group set includes J1 CDM groups, which are the 1st to J1st CDM groups among the J CDM groups; the second CDM group set includes J1 CDM groups, which are the J-J1+1th to Jth CDM groups among the J CDM groups, where J1 = floor(J / 2), and floor() represents the floor operation. This design provides a simple and effective association between port groups and transmission configuration indication states. Furthermore, the number of port groups associated with different transmission configuration indication states is the same, reducing the complexity of terminal device implementation.

[0011] In one possible design, the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group are located in different time units. In the above design, port groups associated with different transmission configuration indication states are located in different time units, providing the terminal device with time to switch beams when receiving service data on different beams, thereby improving the integrity of the service data received by the terminal device.

[0012] In one possible design, the first transmission configuration indication state includes quasi-co-station type D, and / or the second transmission configuration indication state includes quasi-co-station type D; the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group are located in different time units. Since quasi-co-station type D is used to indicate the received analog beam, and the first transmission configuration indication state includes quasi-co-station type D, and / or the second transmission configuration indication state includes quasi-co-station type D, the terminal device may use different analog beams. Therefore, by associating port groups with different transmission configuration indication states located in different time units, time for switching beams is provided for the terminal device to receive service data on different beams, improving the integrity of the service data received by the terminal device.

[0013] In one possible design, the time-frequency resources corresponding to the ports in the first port group are not adjacent to the time-frequency resources corresponding to the ports in the second port group in the time domain. In the above design, the port groups associated with different transmission configuration indication states are located in different time units and are not adjacent, which further provides sufficient time for the terminal device to switch beams to receive service data on different beams, thereby improving the integrity of the service data received by the terminal device.

[0014] In one possible design, the number of time units between the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group is greater than or equal to the capability parameters reported by the terminal device. In this design, port groups associated with different transmission configuration indication states are located in different time units, and the number of time units between them is greater than or equal to the capability parameters reported by the terminal device. This further provides sufficient time for the terminal device to switch beams when receiving service data on different beams, improving the integrity of the service data received by the terminal device.

[0015] In one possible design, the terminal device receives mode indication information from the network device. The mode indication information is used to indicate that each of the N CSI-RS resources in the CSI-RS resource set is associated with one of the M transmission modes. The N CSI-RS resources include a first CSI-RS resource and a second CSI-RS resource. N is an integer greater than 1, and M is a positive integer less than or equal to N.

[0016] Secondly, embodiments of this application provide a channel state information reporting method. This method can be applied to a communication device, which may be a network device, or a chip or chip system within the network device. Taking a network device as an example, the network device sends Channel State Information-Reference Signal (CSI-RS) resource configuration information to a terminal device. The CSI-RS resource configuration information includes a set of CSI-RS resources, which includes at least a first CSI-RS resource. A first port group corresponding to the first CSI-RS resource is associated with a first transmission configuration indication state, and a second port group corresponding to the first CSI-RS resource is associated with a second transmission configuration indication state. The first port group includes at least one port, and the second port group includes at least one port. The identifiers of the ports included in the first port group and the ports included in the second port group are different. The network device receives the CSI reported by the terminal device, whereby the CSI is obtained by the terminal device through CSI measurement based on the CSI-RS resource configuration information.

[0017] In one possible design, the CSI-RS resource set further includes a second CSI-RS resource, the port corresponding to the second CSI-RS resource being associated with a third transmission configuration indication state; CSI includes a first measurement result obtained by performing CSI measurements on the CSI-RS resources in the CSI-RS resource set, the first measurement result including a first CSI parameter and a second CSI parameter; wherein, the first CSI parameter includes a first channel state information-reference signal resource indication (CRI), the CSI-RS resource indicated by the first CRI is the first CSI-RS resource, and the other CSI parameters in the first CSI parameter besides the first CRI are determined on the first CSI-RS resource; wherein, the second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the second CSI-RS resource, and the other CSI parameters in the second CSI parameter besides the second CRI are determined on the second CSI-RS resource.

[0018] In one possible design, the ports in the first port group belong to a first code division multiple access (CDM) group set, which contains one or more CDM groups; the first CDM group set is associated with a first transmission configuration indication state; the ports in the second port group belong to a second code division multiple access (CDM) group set, which contains one or more CDM groups; the second CDM group set is associated with a second transmission configuration indication state; the identifiers of the CDM groups in the first CDM group set and the CDM groups in the second CDM group set are different.

[0019] In one possible design, the first CSI-RS resource includes J CDM groups, where J is an integer greater than 1; the first CDM group set includes J1 CDM groups, which are the 1st to the J1st CDM groups among the J CDM groups; the second CDM group set includes J1 CDM groups, which are the J-J1+1th to the Jth CDM groups among the J CDM groups, where J1 = floor(J / 2), and floor() represents the floor operation.

[0020] In one possible design, the time-frequency resources corresponding to the ports in the first port group are located in different time units than the time-frequency resources corresponding to the ports in the second port group.

[0021] In one possible design, the first transmission configuration indication state includes quasi-co-site type D, and / or the second transmission configuration indication state includes quasi-co-site type D; the time-frequency resources corresponding to the ports included in the first port group and the time-frequency resources corresponding to the ports included in the second port group are located in different time units.

[0022] In one possible design, the time-frequency resources corresponding to the ports in the first port group are not adjacent to the time-frequency resources corresponding to the ports in the second port group in the time domain.

[0023] In one possible design, the number of time units in the time domain between the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group is greater than or equal to the capability parameter reported by the terminal device.

[0024] In one possible design, the network device sends mode indication information to the terminal device. The mode indication information is used to indicate that each of the N CSI-RS resources in the CSI-RS resource set is associated with one of the M transmission modes. The N CSI-RS resources include a first CSI-RS resource and a second CSI-RS resource. N is an integer greater than 1, and M is a positive integer less than or equal to N.

[0025] Thirdly, embodiments of this application provide a channel state information reporting method. This method can be applied to a communication device, which may be a terminal device, or a chip or chip system within the terminal device. Taking a terminal device as an example, the terminal device receives first channel state information—reference signal CSI-RS resource configuration information—from a network device. The first CSI-RS resource configuration information includes a set of CSI-RS resources, which includes at least a first group of CSI-RS resources. The first group of CSI-RS resources includes first CSI-RS resources and second CSI-RS resources. The first CSI-RS resources are associated with a first transmission configuration indication state, and the second CSI-RS resources are associated with a second transmission configuration indication state. There is an association between the first CSI-RS resources and the second CSI-RS resources. Further, the terminal device performs CSI measurements based on the first CSI-RS resource configuration information and reports the CSI to the network device. Through the above method, when the terminal device performs channel measurements on multiple CSI-RS resources associated with different transmission configuration indications, it assumes that both TRPs are providing services to it, reducing the deviation of the measurement results and reducing the impact on system performance.

[0026] In one possible design, the CSI resource configuration information further includes a third CSI-RS resource, which is associated with a third transmission configuration indication state; the CSI includes a first measurement result obtained by performing CSI measurements on CSI-RS resources in the CSI-RS resource set, the first measurement result including a first CSI parameter and a second CSI parameter; wherein the first CSI parameter includes a first CRI, the CSI-RS resource indicated by the first CRI is the third CSI-RS resource, and the other parameters in the first CSI parameter other than the first CRI are determined on the third CSI-RS resource; wherein the second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group, and the other parameters in the second CSI parameter other than the second CRI are determined on the first CSI-RS resource group. In the above design, the optimal measurement results are obtained by measuring each CSI-RS resource individually, as well as the joint measurement results of different CSI-RS resources with different transmission configuration indication states. This prevents interference between transmissions of different TRPs. Furthermore, the measurement results, which assume that two TRPs simultaneously serve the terminal device, better reflect the overall channel state between the two TRPs and the terminal device, thus improving system performance. The terminal device also measures CSI on each CSI-RS resource, which can reflect the channel state between a single TRP and the terminal device, increasing the likelihood of the terminal device using single TRP scheduling.

[0027] In one possible design, the first CSI-RS resource and the second CSI-RS resource occupy different time units. In the above design, CSI-RS resources associated with different transmission configuration indication states are located in different time units, providing the terminal device with time to switch beams when receiving service data on different beams, thereby improving the integrity of the service data received by the terminal device.

[0028] In one possible design, either the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D; the first CSI-RS resource and the second CSI-RS resource occupy different time units. Since quasi-co-site type D is used to indicate the received analog beam, and the first transmission configuration indication state includes quasi-co-site type D, and / or the second transmission configuration indication state includes quasi-co-site type D, the terminal device may use different analog beams. Therefore, by associating different CSI-RS resources with different transmission configuration indication states located in different time units, time for switching beams is provided for the terminal device to receive service data on different beams, improving the integrity of the service data received by the terminal device.

[0029] In one possible design, the first CSI-RS resource and the second CSI-RS resource are not adjacent in the time domain. In this design, CSI-RS resources associated with different transmission configuration indication states are located in different time units and are not adjacent, further providing sufficient time for the terminal device to switch beams to receive service data on different beams, thereby improving the integrity of the service data received by the terminal device.

[0030] In one possible design, the time interval between the first CSI-RS resource and the second CSI-RS resource is greater than or equal to the capability parameter reported by the terminal device. In this design, different CSI-RS resources associated with different transmission configuration indication states are located in different time units, and the number of time units between them is greater than or equal to the capability parameter reported by the terminal device. This further provides sufficient time for the terminal device to switch beams when receiving service data on different beams, improving the integrity of the service data received by the terminal device.

[0031] In one possible design, the terminal device receives mode indication information from the network device. This mode indication information indicates that each of the N CSI-RS resources in the CSI-RS resource set is associated with one of M transmission modes. The N CSI-RS resources include a first CSI-RS resource and a second CSI-RS resource, where N is an integer greater than 1 and M is a positive integer less than or equal to N. This design allows different CSI-RS resources to use the same or different measurement methods, improving flexibility.

[0032] In one possible design, the number of ports corresponding to the CSI-RS resources included in the first CSI-RS resource group is greater than 16.

[0033] In one possible design, the method further includes: receiving second CSI-RS resource configuration information from a network device. The second CSI-RS resource configuration information includes a set of CSI-RS resources. The first port group corresponding to the first CSI-RS resources in the CSI-RS resource set is associated with a first transmission configuration indication state. The second port group corresponding to the first CSI-RS resources is associated with a second transmission configuration indication state. The first port group includes at least one port, and the second port group includes at least one port. The identifiers of the ports in the first port group and the second port group are different. Before performing CSI measurement based on the first resource configuration information, the method further includes: receiving a configuration indication from the network device. The configuration indication is used to indicate the adoption of a first resource configuration method. The resource configuration method of the first CSI-RS resource configuration information is the first resource configuration method, and the resource configuration method of the second CSI-RS resource configuration information is the second resource configuration method. This application provides multiple resource configuration methods, allowing the network device to instruct the terminal device to adopt which resource configuration method as needed, thus improving flexibility.

[0034] Fourthly, embodiments of this application provide a channel state information reporting method. This method can be applied to a communication device, which can be a network device, or a chip or chip system within the network device. Specific beneficial effects can be found in the third aspect and related descriptions of any design within the third aspect, which will not be repeated here. Taking a network device as an example, the network device sends first channel state information—reference signal (CSI-RS) resource configuration information to a terminal device. The first CSI-RS resource configuration information includes a set of CSI-RS resources, which in turn includes at least a first group of CSI-RS resources. The first group of CSI-RS resources includes first CSI-RS resources and second CSI-RS resources. The first CSI-RS resources are associated with a first transmission configuration indication state, and the second CSI-RS resources are associated with a second transmission configuration indication state. There is an association between the first CSI-RS resources and the second CSI-RS resources. Further, the network device receives the CSI reported by the terminal device, where the CSI is obtained by the terminal device through CSI measurement based on the first CSI-RS resource configuration information.

[0035] In one possible design, the CSI resource configuration information further includes a third CSI-RS resource, which is associated with a third transmission configuration indication state; the CSI includes a first measurement result obtained by performing CSI measurements on CSI-RS resources in the CSI-RS resource set, the first measurement result including a first CSI parameter and a second CSI parameter; wherein the first CSI parameter includes a first CRI, the CSI-RS resource indicated by the first CRI is the third CSI-RS resource, and the other parameters in the first CSI parameter other than the first CRI are determined on the third CSI-RS resource; wherein the second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group, and the other parameters in the second CSI parameter other than the second CRI are determined on the first CSI-RS resource group.

[0036] In one possible design, the first CSI-RS resource and the second CSI-RS resource occupy different time units.

[0037] In one possible design, the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D; the time units occupied by the first CSI-RS resource and the second CSI-RS resource are different.

[0038] In one possible design, the first CSI-RS resource and the second CSI-RS resource are not adjacent in the time domain.

[0039] In one possible design, the time interval between the first CSI-RS resource and the second CSI-RS resource is greater than or equal to the capability parameter reported by the terminal device.

[0040] In one possible design, the network device sends mode indication information to the terminal device. The mode indication information is used to indicate that each of the N CSI-RS resources in the CSI-RS resource set is associated with one of the M transmission modes. The N CSI-RS resources include a first CSI-RS resource and a second CSI-RS resource. N is an integer greater than 1, and M is a positive integer less than or equal to N.

[0041] In one possible design, the number of ports corresponding to the CSI-RS resources included in the first CSI-RS resource group is greater than 16.

[0042] In one possible design, the method further includes: receiving second CSI-RS resource configuration information from a network device, the second CSI-RS resource configuration information including a set of CSI-RS resources, the first port group corresponding to the first CSI-RS resources included in the CSI-RS resource set being associated with a first transmission configuration indication state, the second port group corresponding to the first CSI-RS resources being associated with a second transmission configuration indication state, the first port group including at least one port, the second port group including at least one port, and the identifiers of the ports included in the first port group being different from the identifiers of the ports included in the second port group; before performing CSI measurement based on the first resource configuration information, the method further includes: receiving a configuration indication from a network device, the configuration indication being used to indicate the adoption of a first resource configuration method, the resource configuration method of the first CSI-RS resource configuration information being the first resource configuration method, and the resource configuration method of the second CSI-RS resource configuration information being the second resource configuration method.

[0043] Fifthly, this application provides a channel state information (CSI) reporting method. This method can be applied to a communication device, which may be a terminal device, or a chip or chip system within the terminal device. Taking a terminal device as an example, the terminal device receives a CSI reporting configuration group from a network device. The CSI reporting configuration group includes a first CSI reporting configuration and a second CSI reporting configuration. The first and second CSI reporting configurations are used to configure the terminal device to report CSI. The first CSI reporting configuration is associated with a first CSI-RS resource set, and the second CSI reporting configuration is associated with a second CSI-RS resource set. The first CSI-RS resource set is associated with a first transmission configuration indication state, and the second CSI-RS resource set is associated with a second transmission configuration indication state. The first and second CSI reporting configurations have a binding relationship, which is used to indicate that CSI measurements are performed on the CSI-RS resource sets associated with the two CSI reporting configurations with the binding relationship. Further, the terminal device performs CSI measurements according to the CSI reporting configuration group and reports the CSI to the network device. In this way, when the terminal device performs channel measurements on CSI-RS resource sets associated with different transmission configuration indications, it assumes that both TRPs are providing services to it, thereby reducing the deviation of the measurement results and reducing the impact on system performance.

[0044] In one possible design, the CSI includes measurement results obtained by performing CSI measurements on a first CSI-RS resource set associated with the first CSI reporting configuration, measurement results obtained by performing CSI measurements on a second CSI-RS resource set associated with the second CSI reporting configuration, and measurement results obtained by performing CSI measurements on the first CSI-RS resource set and the second CSI-RS resource set.

[0045] In one possible design, the method further includes: the terminal device receiving indication information from the network device, the indication information being used to indicate that the first CSI reporting configuration and the second CSI reporting configuration in the CSI reporting configuration group have a binding relationship.

[0046] In one possible design, the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0047] In one possible design, the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D; the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0048] In one possible design, the first CSI-RS resource set and the second CSI-RS resource set are not adjacent in the time domain.

[0049] In one possible design, the time interval between the first CSI-RS resource set and the second CSI-RS resource set is greater than or equal to the capability parameter reported by the terminal device.

[0050] Sixthly, this application provides a channel state information (CSI) reporting method. This method can be applied to a communication device, which may be a network device, or a chip or chip system within the network device. Taking a network device as an example, the network device sends a CSI reporting configuration group to a terminal device. The CSI reporting configuration group includes a first CSI reporting configuration and a second CSI reporting configuration. The first and second CSI reporting configurations are used to configure the method of reporting CSI to the terminal device. The first CSI reporting configuration is associated with a first CSI-RS resource set, and the second CSI reporting configuration is associated with a second CSI-RS resource set. The first CSI-RS resource set is associated with a first transmission configuration indication state, and the second CSI-RS resource set is associated with a second transmission configuration indication state. The first and second CSI reporting configurations are bound together, and the binding relationship is used to indicate that CSI measurements are performed on the CSI-RS resource sets associated with the two bound CSI reporting configurations, respectively. Further, the terminal device performs CSI measurements according to the CSI reporting configuration group and reports the CSI to the network device, thereby the network device receives the CSI reported by the terminal device.

[0051] In one possible design, the CSI includes measurement results obtained by performing CSI measurements on a first CSI-RS resource set associated with the first CSI reporting configuration, measurement results obtained by performing CSI measurements on a second CSI-RS resource set associated with the second CSI reporting configuration, and measurement results obtained by performing CSI measurements on the first CSI-RS resource set and the second CSI-RS resource set.

[0052] In one possible design, the method further includes: the network device sending indication information to the terminal device, the indication information being used to indicate that the first CSI reporting configuration and the second CSI reporting configuration in the CSI reporting configuration group have a binding relationship.

[0053] In one possible design, the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0054] In one possible design, the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D; the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0055] In one possible design, the first CSI-RS resource set and the second CSI-RS resource set are not adjacent in the time domain.

[0056] In one possible design, the time interval between the first CSI-RS resource set and the second CSI-RS resource set is greater than or equal to the capability parameter reported by the terminal device.

[0057] In a seventh aspect, this application provides a communication device for a terminal device or a chip of a terminal device, including units or means for performing the methods in the first aspect or any possible implementation thereof, or including units or means for performing the methods in the third aspect or any possible implementation thereof, or including units or means for performing the methods in the fifth aspect or any possible implementation thereof.

[0058] Eighthly, this application provides a communication device for a network device or a chip of a network device, including units or means for performing the methods in the second aspect or any possible implementation thereof, or including units or means for performing the methods in the fourth aspect or any possible implementation thereof, or including units or means for performing the methods in the sixth aspect or any possible implementation thereof.

[0059] Ninthly, this application provides a communication device for a terminal device or a chip of a terminal device, including at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to execute the method in the first aspect or any possible implementation of the first aspect, or to execute the method in the third aspect or any possible implementation of the third aspect, or to execute the method in the fifth aspect or any possible implementation of the fifth aspect.

[0060] In a tenth aspect, this application provides a communication device for a network device or a chip of a network device, comprising at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to execute the method in the aforementioned second aspect or any possible implementation thereof, or to execute the method in the aforementioned fourth aspect or any possible implementation thereof, or to execute the method in the aforementioned sixth aspect or any possible implementation thereof.

[0061] Eleventhly, this application provides a communication device, including a processor and a communication interface. The communication interface is used to input and / or output signals, including data and / or program instructions. The communication interface is capable of receiving signals from other communication devices outside the communication device and transmitting them to the processor, or sending signals from the processor to other communication devices outside the communication device. The processor is used to implement the methods in the first aspect or any possible implementation of the first aspect through logic circuits or execution code instructions; or, to implement the methods in the third aspect or any possible implementation of the third aspect; or, to implement the methods in the fifth aspect or any possible implementation of the fifth aspect.

[0062] In a twelfth aspect, this application provides a communication device, including a processor and a communication interface. The communication interface is used to input and / or output signals, including data and / or program instructions. The communication interface is capable of receiving signals from other communication devices outside the communication device and transmitting them to the processor, or sending signals from the processor to other communication devices outside the communication device. The processor is used through logic circuits or execution code instructions to implement the methods in the second aspect or any possible implementation of the second aspect; or to implement the methods in the fourth aspect or any possible implementation of the fourth aspect; or to implement the methods in the sixth aspect or any possible implementation of the sixth aspect.

[0063] In a thirteenth aspect, this application provides a computer program product comprising computer instructions that, when executed, cause the method in the first aspect or any possible implementation thereof to be executed, or cause the method in the third aspect or any possible implementation thereof to be executed, or cause the method in the fifth aspect or any possible implementation thereof to be executed.

[0064] In a fourteenth aspect, this application provides a computer program product comprising computer instructions that, when executed, cause the method in the aforementioned second aspect or any possible implementation thereof to be executed, or cause the method in the aforementioned fourth aspect or any possible implementation thereof to be executed, or cause the method in the aforementioned sixth aspect or any possible implementation thereof to be executed.

[0065] In a fifteenth aspect, this application provides a computer-readable storage medium storing computer instructions that, when executed, cause the method in the first aspect or any possible implementation thereof to be executed, or cause the method in the third aspect or any possible implementation thereof to be executed, or cause the method in the fifth aspect or any possible implementation thereof to be executed.

[0066] In a sixteenth aspect, this application provides a computer-readable storage medium storing computer instructions that, when executed, cause the method in the aforementioned second aspect or any possible implementation thereof to be executed, or cause the method in the aforementioned fourth aspect or any possible implementation thereof to be executed, or cause the method in the aforementioned sixth aspect or any possible implementation thereof to be executed.

[0067] For details regarding the beneficial effects of aspects seven through sixteen above, please refer to the records of aspects one through six above; they will not be repeated here. Attached Figure Description

[0068] Figure 1 A schematic diagram of a communication system architecture provided in an embodiment of this application;

[0069] Figure 2 A schematic flowchart illustrating a first possible method for reporting channel state information provided in this application embodiment;

[0070] Figure 3 This is a schematic diagram of another communication system architecture provided in an embodiment of this application;

[0071] Figure 4This is a schematic flowchart illustrating a second possible method for reporting channel state information provided in an embodiment of this application.

[0072] Figure 5 A schematic diagram of a third possible channel state information reporting method provided in this application embodiment;

[0073] Figure 6 This is a schematic diagram of the communication device 600 provided in an embodiment of this application;

[0074] Figure 7 This is a schematic diagram of the communication device 700 provided in an embodiment of this application;

[0075] Figure 8 This is a schematic diagram of the communication device 800 provided in an embodiment of this application. Detailed Implementation

[0076] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0077] The technical solutions of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) systems, 5G mobile communication systems, or new radio access technology (NR). Among these, 5G mobile communication systems may include non-standalone (NSA) and / or standalone (SA) networking.

[0078] The technical solutions provided in this application can also be applied to machine-type communication (MTC), Long Term Evolution-machine (LTE-M) technology, device-to-device (D2D) networks, machine-to-machine (M2M) networks, Internet of Things (IoT) networks, or other networks. IoT networks, for example, can include vehicle-to-everything (V2X) networks. The communication methods in V2X systems are collectively referred to as vehicle-to-X (V2X), where X can represent anything. For example, V2X can include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, or vehicle-to-network (V2N) communication, etc.

[0079] The technical solution provided in this application can also be applied to future communication systems, such as sixth-generation mobile communication systems. This application does not limit this application.

[0080] It should be understood that the terms "an embodiment," "an implementation," "an embodiment," or "an example" used throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, the phrases "in an embodiment," "an implementation," "an embodiment," or "an example" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0081] Furthermore, the terms "system" and "network" are often used interchangeably in this paper. The term "and / or" in this paper merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. (The symbols used in this paper are...) This represents the floor operation on X, also known as floor(X), symbol... This indicates a rounding operation on Y, which can also be represented as ceiling(Y). Additionally, the character " / " in this document generally indicates an "OR" relationship between the preceding and following objects. The term "at least one" in this application refers to one or more, including one, two, three, or more; "multiple" refers to two or more, including two, three, or more. Furthermore, it should be understood that in the description of this application, words such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or order. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. It should be understood that in the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should be understood that determining B based on A does not mean determining B solely based on A; B can also be determined based on A and / or other information. In this application, "for indicating" can include both direct and indirect indication. When describing an indication as indicating A, it can include whether the indication directly or indirectly indicates A, but does not necessarily mean that the indication necessarily carries A. Furthermore, the terms "comprising" and "having" in the embodiments, claims, and drawings of this application are not exclusive. For example, a process, method, system, product, or device that includes a series of steps or modules is not limited to the listed steps or modules and may also include steps or modules not listed.

[0082] Figure 1 This application illustrates a communication system 100, which may include network devices and terminal devices. The embodiments of this application do not limit the number of network devices and terminal devices included in the communication system. Figure 1 The example includes six terminal devices, namely terminal device 1 to terminal device 6. Figure 1 This is just an illustration; the communication system may also include other network devices, such as core network equipment, wireless relay equipment, and wireless backhaul equipment. Figure 1 Not shown in the diagram. Network equipment can provide wireless access-related services to terminal devices, implementing one or more of the following functions: wireless physical layer functions, resource scheduling and wireless resource management, quality of service (QoS) management, wireless access control, and mobility management. Terminal devices can communicate with network equipment via the air interface.

[0083] Network equipment is an access device that enables terminal devices to wirelessly access the mobile communication system. It can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next-generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. It can also be a module or unit that performs some of the functions of a base station; for example, it can be a central unit (CU) or a distributed unit (DU). The embodiments of this application do not limit the specific technology or device form used in the network equipment.

[0084] Terminal equipment can also be referred to as a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. Terminal equipment can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal equipment.

[0085] Network devices and terminal devices can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; and they can also be deployed in the air on airplanes, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of the network devices and terminal devices.

[0086] Network devices and terminal devices can communicate using licensed spectrum, unlicensed spectrum, or both simultaneously. They can also communicate using spectrum below 6 GHz, spectrum above 6 GHz, or both simultaneously. The embodiments of this application do not limit the spectrum resources used between network devices and terminal devices.

[0087] The system architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0088] The technical concepts involved in the embodiments of this application will be explained below.

[0089] 1) TRP transmission method based on multiple DCI. It can be abbreviated as mDCI mTRP.

[0090] The multi-DCI approach involves two TRPs each sending one DCI, specifically, each TRP sending the DCI to the same terminal device. Different TRPs schedule different PDSCHs to send different service data to the same terminal device. DCI is control information from the physical layer network device instructing the behavior of the terminal device. Simultaneously, the terminal device also receives higher-layer signaling from the network device, used to instruct its behavior. Higher-layer signaling is information above the physical layer used to control and manage related terminal devices, such as radio resource control (RRC) signaling. The network device configures control channel resource configuration information for the terminal device, including a control resource set (CORESET) and a control resource set (CORESET) pool index. The CORESET pool index indicates the control resource set pool to which the CORESET belongs. The physical downlink control channel (PDCCH) carrying the DCI is transmitted on the downlink control resources associated with the CORESET.

[0091] If the CORESET Pool Index is different, then the TRP that transmits the DCI using the PDCCH in that CORESET will be different. In other words, the CORESET Pool Index in the control channel resource configuration information can be used to distinguish different TRPs. For example, if the CORESET Pool Index in the control channel resource configuration information corresponding to two DCIs is different, then these two DCIs come from different TRPs. It should be noted that although the two PDSCHs scheduled for the above two DCIs are both sent to the same terminal device, the two TRPs will interfere with each other when transmitting service data through their scheduled PDSCHs due to the non-ideal transmission parameters. For example, if a network device sends PDSCH1 to the terminal device through TRP1 and PDSCH2 to the same terminal device through TRP2, when PDSCH1 and PDSCH2 overlap in time and frequency, PDSCH1 will cause strong interference to the reception of PDSCH2 on the overlapping resources, and PDSCH2 will also cause strong interference to the reception of PDSCH1.

[0092] 2) TRP transmission method based on single DCI.

[0093] In the single-DCI-based approach, two TRPs send one DCI to the terminal device to schedule the PDSCH to send service data to the terminal device. However, some layer or DMRS (Demodulation Reference Signal) ports in this PDSCH are occupied by one TRP, while other layer or DMRS ports are occupied by another TRP. Since the layer or DMRS ports of the PDSCH are occupied by different TRPs, the time-frequency offset of signals from different TRPs arriving at the terminal device is different. To compensate for these different time-frequency offsets, the NR protocol specifies that in the single-DCI multi-TRP transmission mode, the network device, through higher-layer signaling, associates one code point of the Domain Transmission Configuration Indication (TCI) in the DCI with two different TCI states to the terminal device. The network device can simultaneously indicate two different TCI states to the terminal device through the domain TCI in the DCI. Each TCI state can be used to configure the quasi-co-location (QCL) relationship between a set of DMRS ports of the PDSCH and other downlink reference signals. In single TRP mode, a code point of the TCI field in DCI is associated with only one TCI state.

[0094] It should be noted that if the channel characteristics of a certain DMRS port symbol can be derived from another DMRS port, then the two DMRS ports are considered to have a QCL relationship, and the channel estimation results obtained from one DMRS port can be used by the other DMRS port.

[0095] In addition, multi-TRP transmission based on a single DCI can also be used to enhance the reliability of signal transmission. In the NR Rel-16 protocol, three methods are introduced to enhance the reliable transmission of signals: (1) single DCI based on space division multiplexing (SDM-based), single DCI based on frequency division multiplexing (FDM-based), and single DCI based on time division multiplexing (TDM-based).

[0096] (1) Single-DCI based SDM scheme. It can be abbreviated as Scheme1A or Scheme1a.

[0097] Two Transmission Points (TRPs) transmit different streams from the same PDSCH to the same terminal device on the same time-frequency resources. On the one hand, the same signal, based on spatial division multiplexing, is distributed across multiple spatially isolated streams, which can reduce the code rate; on the other hand, since the signal is transmitted from two physically separated TRPs to the same terminal device, spatial diversity gain can be obtained, thus effectively improving the reliability of signal transmission. However, due to the non-ideal nature of signal transmission, different streams can interfere with each other.

[0098] (2) Single-DCI based FDM Scheme A. It can be abbreviated as Scheme 2A or Scheme 2a.

[0099] Two TRPs transmit the same PDSCH to the same terminal device on different frequency domain resources. Specifically, the same redundant version of the same codeword is mapped to different frequency domain resources, and different TRPs transmit the same DCI to the terminal device through different frequency domain resources. From the terminal device's receiving perspective, it is similar to a normal PDSCH transmitted based on a single TRP. The difference is that in a normal single TRP PDSCH, at any given time, the frequency domain resources of the entire allocated PDSCH are associated with only one TCI state. However, in the frequency division multiplexing-based single DCI method, the frequency domain resources allocated for PDSCH are divided into two parts, and each part of the frequency domain resources is associated with a different TCI state.

[0100] (3) Single-DCI based FDM Scheme B. It can be abbreviated as Scheme 2B or Scheme 2b.

[0101] Similar to the single DCI scheme based on frequency division multiplexing (FDM), two TRPs send the same PDSCH to the same terminal device on different frequency domain resources. The difference is that different frequency domain resources map different redundant versions of the same codeword. It is important to note that each redundant version can be independently decoded to obtain a transport block. These two different redundant versions are sent to the terminal device by different TRPs on different frequency domain resources. The terminal device receives signals from different TRPs on the corresponding frequency domain resources, and the different frequency domain resources corresponding to different TRPs are associated with different TCI states.

[0102] (4) Single-DCI based TDMScheme A, which can be abbreviated as Scheme 3.

[0103] Two TRPs send the same PDSCH to the same terminal device on different time-domain resources. Specifically, different redundant versions of the same codeword are mapped to two different time-domain resources within the same time slot (each time-domain resource within a time slot consists of n consecutive symbols, the number and position of n being configured by the network device). The two TRPs send the different redundant versions of the same codeword to the terminal device through the different time-domain resources within the same time slot. The two different time-domain resources within the same time slot are associated with different TCI states. The two time-domain resources within the same time slot are separated by K symbols, where K is configured by the network device to ensure that the terminal device has sufficient configuration preparation time before continuing to receive signals from another TRP after receiving signals from one TRP.

[0104] (5) Single-DCI based TDMSchemeB. It can be abbreviated as Scheme 4.

[0105] Two TRPs send the same PDSCH to the same terminal device on different time-domain resources. Specifically, different redundant versions of the same codeword are mapped to different time slots, and the two TRPs send these different redundant versions of the same codeword to the terminal device through different time slots. The resources of different time slots are associated with different TCI states.

[0106] 3) Measurement and reporting of CSI.

[0107] CSI reporting methods can include periodic CSI reporting (P-CSI), semi-persistent CSI reporting (SP-CSI), and aperiodic CSI reporting (AP-CSI).

[0108] (1) The periodic CSI reporting process includes: network devices configuring terminal devices to perform periodic CSI reporting via higher-layer signaling (such as RRC signaling); terminal devices performing channel and interference measurements based on periodic CSI-RS resources; and reporting CSI on the physical uplink control channel (PUCCH) at fixed time intervals. In periodic CSI reporting, the channel measurement resource (CMR) and interference measurement resource (IMR) used for measurement are both periodic. Specific periodicity and resource mapping parameters can be configured by the network devices for the terminal devices via RRC signaling. Furthermore, the CSI reporting period and the PUCCH resources used for reporting are also configured by the network devices for the terminal devices via RRC signaling.

[0109] (2) The semi-persistent CSI reporting process includes: When a terminal device is configured to use semi-persistent CSI reporting, it only starts CSI reporting when it receives downlink signaling from the network to indicate that it should start CSI reporting, and only ends CSI reporting after receiving downlink signaling to indicate that it should stop CSI reporting. Between these two downlink signaling times, the terminal device performs periodic CSI measurements and reports. The CMR and IMR used in semi-persistent CSI reporting can be periodic or semi-persistent. When a terminal device uses semi-persistent CSI reporting, it can report on PUCCH resources. Network devices can activate and deactivate semi-persistent CSI reporting through downlink higher-layer signaling (e.g., MAC CE signaling). When a terminal device uses semi-persistent CSI reporting, it can also report on the physical uplink shared channel (PUSCH) resources. Network devices can activate and deactivate semi-persistent CSI reporting through physical layer downlink control information (DCI). Regardless of whether SP CSI measurement is performed using PUCCH or PUSCH, the measurement parameters such as measurement quantity and measurement bandwidth can be configured by the network device to the terminal device via RRC signaling.

[0110] (3) Non-periodic CSI reporting.

[0111] The non-periodic CSI reporting and measurement process includes:

[0112] The network device first semi-statically configures multiple CSI reporting parameters for the terminal device via downlink RRC signaling. For example, the network device triggers one or more CSI reporting configuration parameters to the terminal device via DCI. The terminal device performs CSI measurements according to the CSI reporting configuration parameters and reports the CSI measurement results using PUSCH resources. It is important to note that although aperiodic CSI reporting, like semi-persistent CSI reporting, requires network device triggering, aperiodic CSI reporting does not require deactivation after activation via DCI and only performs one measurement and report. The CMR and IMR used in aperiodic CSI reporting can be periodic, semi-persistent, or aperiodic.

[0113] It should be noted that in the three CSI reporting schemes mentioned above, the configuration parameters required during the CSI reporting process can be configured by the network device to the terminal device via RRC signaling. These configuration parameters may include the reporting quantity and reporting bandwidth. The reporting quantity may include one or more of the following: Rank Indicator (RI), Channel Quality Indicator (CQI), PMI, or Precoding Matrix Indicator (PMI). In NR systems, network devices can fulfill different measurement requirements and assumed transmission modes through the configuration parameters of CSI measurements.

[0114] Network devices can configure CSI resource configuration parameters for terminal devices via higher-layer signaling, such as RRC signaling, to indicate the resources used for measurement and reporting. For example, the csi-resourceConfig field in RRC signaling can be used to configure the resources used for measurement and reporting for the terminal device. CSI resource configuration parameters can include 1 to 3 CSI-RS resource settings.

[0115] In one example, when the CSI resource configuration parameters include one CSI-RS resource setting, this CSI-RS resource setting is used to implement beam measurement, that is, to calculate the Layer 1 Reference Signal Received Power (L1-RSRP).

[0116] In another example, when the CSI resource configuration parameters include two CSI-RS resource settings, one CSI-RS resource setting contains a set of non-zero power channel state information-reference signal resources (NZP CSI-RS resource set). The NZP CSI-RS resource set can be configured via the higher-level parameter NZP-CSI-RS-ResourceSet. The network device can indicate to the terminal device the NZP CSI-RS resource set used for channel measurement within the set of NZP CSI-RS resource sets, allowing the terminal device to perform channel measurements based on the NZP CSI-RS resource set indicated by the network device. The other CSI-RS resource setting contains either an NZP CSI-RS resource set or a CSI-Interference Measurement (CSI-IM) resource set. Further, the terminal device performs interference measurements on either the NZP CSI-RS resource set or the CSI-IM resource set. The CSI-IM resource set can be configured to the terminal device by the network device via the higher-level parameter CSI-IM-ResourceSet.

[0117] It should be noted that: A single NZP CSI-RS resource set for channel measurement, as indicated by the network device in the CSI-RS resource setting, can contain n NZP CSI-RS resources. When interference measurement is based on NZP CSI-RS, n = 1; while when interference measurement is based on CSI-IM, n ≥ 1 and n is an integer. When n ≥ 1, the CSI-IM resource set will also contain the same number of CSI-IM resources, corresponding one-to-one with the n NZP CSI-RS resources in the NZP CSI-RS resource set. The terminal device will select one NZP CSI-RS resource from the n NZP CSI-RS resources, for example, the Xth NZP CSI-RS resource, and perform measurements on this NZP CSI-RS resource and the corresponding CSI-IM resource, reporting the CSI measurement results. The CSI measurement results include the reporting quantity indicated by the network device through higher-layer signaling (reportQuantity, included in the CSI reporting configuration parameter CSI-ReportConfig). When reporting CSI measurement results on the terminal device, the corresponding NZP CSI-RS resource indicator (CRI) will also be reported, which is used to indicate X.

[0118] In another example, when the CSI resource configuration parameters include three CSI-RS resource settings, the first CSI-RS resource setting contains a set of NZP CSI-RS resource sets. The network device can indicate to the terminal device the NZP CSI-RS resource set used for channel measurement within this set, allowing the terminal device to perform channel measurements based on the NZP CSI-RS resource set indicated by the network device. The second CSI-RS resource setting contains a set of NZP CSI-RS resource sets; the third CSI-RS resource setting contains a CSI-IM resource set. The terminal device performs interference measurements based on the second and third resources, the difference being that the terminal device will perform inter-user interference measurements based on the NZP CSI-RS resource set included in the second CSI-RS resource setting, and inter-cell interference measurements based on the CSI-IM resource set included in the third CSI-RS resource setting.

[0119] 4) CSI-RS configuration.

[0120] In NR systems, channel measurements are performed on the NZP CSI-RS resource setting. The time-domain transmission behavior of NZP CSI-RS can be periodic (P-CSI-RS), semi-persistent (SP-CSI-RS), or aperiodic (AP-CSI-RS). For each CSI reporting, one CSI-RS resource setting can be configured for channel measurement. This CSI-RS resource setting will be configured with a type (P / SP / AP-CSI-RS), which is used to indicate time-domain transmission behavior. Each CSI-RS resource setting can contain m CSI-RS resource sets. When the type of the CSI-RS resource setting is P / SP-CSI-RS, m = 1; when the type of the CSI-RS resource setting is AP-CSI-RS, m ≥ 1. When m ≥ 1, for a specific CSI measurement report, the network device will select one CSI-RS resource set from m ≥ 1 CSI-RS resource sets for the terminal device to associate with this specific CSI measurement and report.

[0121] It should be noted that when interference measurement is performed in the NZP CSI-RS resource setting instead of the CSI-IM resource setting, the network device configures three CSI-RS resource settings or two CSI-RS resource settings for the terminal device. The first CSI-RS resource setting is used for channel measurement, while the second CSI-RS resource setting is used for interference measurement. The second CSI-RS resource setting contains a set of CSI-IM resource sets, and the CSI-RS resource set used for channel measurement can have at most one NZP CSI-RS resource configured. When interference measurement is performed in the CSI-IM resource set, the CSI-RS resource set used for channel measurement can have n ≥ 1 NZP CSI-RS resource configured.

[0122] Interference measured by NZP CSI-RS is multi-user interference, which is mutual interference between multiple terminal devices simultaneously scheduled on the same time-frequency resources due to non-ideal transmission parameters; while interference measured by CSI-IM is inter-cell interference. Therefore, when performing multi-user interference measurements, network devices fix one NZP CSI-RS resource set for channel measurement, while simultaneously measuring interference from other terminal devices on multiple NZP CSI-RS resource sets. If the NZP CSI-RS resource set used for channel measurement contains multiple NZP CSI-RS resources, the complexity lies in how these NZP CSI-RS resources are correlated with the NZP CSI-RS resource used for interference measurement for a single CSI measurement. However, when interference measurement is based on CSI-IM, a single CSI-RS resource set can contain n ≥ 1 NZP CSI-RS resources, and these different NZP CSI-RS resources can be independently configured with a transmission configuration indicator (TCI state). Each TCI state contains quasi-co-location information (QCL-Info). The QCL-Info is used to inform the terminal device that the NZP CSI-RS signal carried on the current NZP CSI-RS resource is QCL with a certain reference signal, and also specifies the type of QCL. Terminal devices can use the channel estimation results on the reference signal configured in QCL-Info to perform the above-mentioned reception and channel estimation of NZP CSI-RS signals. The specific parameters that can be used for the reception and channel estimation of NZP CSI-RS signals are determined by the QCL type contained in the QCL-Info configured by the network device.

[0123] The NR system currently includes four QCL types, as shown in Table 1.

[0124] Table 1

[0125]

[0126] From the above description of CSI measurement and reporting and CSI-RS configuration, it can be seen that the current CSI measurement and reporting are designed for single TRP transmission mode. Specifically, when performing interference measurement based on CSI-IM, n≥1 NZP CSI-RS resources can be configured in the CSI-RS resource set used for channel measurement, and n≥1 NZP CSI-RS resources can be configured with independent TCI states. That is, these NZP CSI-RS resources can be associated with different TRPs. However, when the terminal device performs CSI reporting, the terminal device selects one NZP CSI-RS resource from the n≥1 NZP CSI-RS resource set and reports the CSI measurement results obtained from the selected NZP CSI-RS resource and its associated CSI-IM resource to the network device. It can be understood that the reported CSI measurement results represent the measurement results when the TRP associated with the selected NZP CSI-RS resource independently serves the terminal device.

[0127] In multi-TRP transmission mode, at least two TRPs serve the terminal device. In multi-DCI multi-TRP transmission mode, the network device sends two DCIs to the terminal device through two TRPs. The network device configures different CSI reporting configuration information for the two different TRPs. The terminal device reports two corresponding CSI measurement results according to the CSI reporting configuration information to support the network device's multi-DCI multi-TRP scheduling. However, due to the non-ideal nature of channel transmission, when the network device schedules two PDSCHs through two DCIs based on the two CSI measurement results independently measured and reported by the terminal device corresponding to different TRPs, the two PDSCHs may have overlapping time-frequency resources. These two PDSCHs will then interfere with each other, and since they need to be sent to the same terminal device, the interference is significant and cannot be ignored. Furthermore, during the measurement process, since the two CSI reporting configuration information corresponding to different TRPs are configured independently and have no correlation, the interference between the PDSCHs is not taken into account in the CSI measurement. Therefore, there is a deviation between the measurement and the actual transmission, which will cause a degradation in system performance.

[0128] In a single-DCI multi-TRP transmission mode, the network device sends one DCI-scheduled PDSCH to the terminal device. Different TRPs schedule different PDSCH resources, which can be distinguished using spatial, frequency, or time domains. Regardless of how the PDSCH resources are distinguished, the network device only indicates one MCS (modulation and coding scheme) to the terminal device, and this MCS is determined based on the CQI from the CSI measurement results reported by the terminal device.

[0129] Currently, CSI measurements can only independently measure the channel state between two TRPs and the terminal device, and independently report two CSI measurement results. The CQI included in these two CSI measurement results is estimated based on the assumption that the TRPs independently serve the terminal device. The network device needs to calculate the channel state when both TRPs simultaneously serve the terminal device based on the two CSI measurement results reported by the terminal device, and then determine the MCS used for multi-TRP transmission. However, the above calculation process does not reflect the actual channel state between the two TRPs and the terminal device. Therefore, the MCS and other scheduling parameters determined based on the calculation results will affect system performance.

[0130] Based on this, embodiments of this application provide a method and apparatus for reporting channel state information to address the problem of system performance degradation. Specifically, embodiments of this application provide, but are not limited to, the following three possible implementations:

[0131] One possible implementation is to configure different port groups belonging to the same CSI-RS resource in the CSI-RS resource set of the terminal device to be associated with different TCI-States, or to configure different port groups belonging to the same CSI-RS resource in the terminal device to be associated with different TRPs.

[0132] The second possible implementation is to configure different CSI-RS resources belonging to the same CSI-RS resource group of the terminal device to be associated with different TCI-States, or to configure different CSI-RS resources belonging to the same CSI-RS resource group of the terminal device to be associated with different TRPs.

[0133] The third possible implementation involves configuring different CSI reporting configurations (CSI-reportConfig) for terminal devices and associating them with different TRPs.

[0134] The first possible implementation method will be described in detail below with reference to specific embodiments. See [link to relevant documentation]. Figure 2 As shown.

[0135] S201, the network device sends CSI-RS resource configuration information to the terminal device.

[0136] The CSI-RS resource configuration information includes one or more CSI-RS resources. These resources belong to one or more CSI-RS resource sets; that is, a CSI-RS resource set may include one or more CSI-RS resources. Different CSI-RS resource sets may contain the same or different numbers of CSI-RS resources, and this application does not specifically limit this. One CSI-RS resource is associated with n TCI states, where n is an integer greater than or equal to 2. It should be noted that different CSI-RS resources may be associated with the same or different numbers of TCI states.

[0137] Take the first CSI-RS resource in the CSI-RS resource set as an example, where the first CSI-RS resource is associated with two TCI states. For ease of description, the two TCI states are referred to as the first TCI state and the second TCI state, respectively. Each port group in the multiple port groups corresponding to the first CSI-RS resource is associated with either the first TCI state or the second TCI state. As an example, the first port group in the first CSI-RS resource is associated with the first TCI state, and the second port group in the first CSI-RS resource is associated with the second TCI state. The first port group and the second port group are different port groups, that is, the ports included in the first port group are different from the ports included in the second port group, or the identifiers of the ports included in the first port group are different from the identifiers of the ports included in the second port group. The identifier of a port can be the port number, the index value of the port, or the offset value of the port in the port group. For example, in NR, the port group can be a code division multiplexing (CDM) group. Port p can be represented by the following formula (1).

[0138] p = 3000 + s + jL; Formula (1)

[0139] in, s = 0, 1, ..., L-1; s represents the offset of the port within the CDM group, j represents the index value of the CDM group, L represents the size of the CDM group, and N represents the total number of ports in the CSI-RS. N is configured by the network device, and L is determined by the CSI-RS resource configuration parameters configured by the network device.

[0140] In one possible implementation, the port groups corresponding to the first CSI-RS resource can be divided. Taking a port group as a CDM group as an example, for instance, one or more port groups associated with the first TCI state contained in the first CSI-RS resource are referred to as the first CDM group set. One or more port groups associated with the second TCI state contained in the first CSI-RS resource are referred to as the second CDM group set. The first CDM group set includes one or more CDM groups, including the first port group. The second CDM group set includes one or more CDM groups, including the second CDM group. The first CDM group set is associated with the first TCI state, and the second CDM group set is associated with the second TCI state. There is no overlap between the CDM groups included in the first and second CDM group sets; in other words, the identifiers of the CDM groups in the first and second CDM group sets are different. The identifier of a CDM group can be an index value of the CDM group, or a different offset value relative to a fixed value, or the port number of the port included in the CDM group, or other identifiers used to indicate a CDM are all applicable to this application. The number of CDM groups associated with the first TCI state and the number of CDM groups associated with the second TCI state in the first CSI-RS resource can be the same to reduce the processing complexity of the terminal device.

[0141] As an example, the identifiers of the CDM groups in the first CDM group set and the CDM groups in the second CDM group set can be determined by the CSI-RS resource configuration information, and the CSI-RS resources included in the CSI-RS resource configuration information can satisfy the configuration corresponding to any row (ROW) in Table 1.

[0142] Table 1

[0143]

[0144]

[0145] As shown in Table 1 above, different ports of the NR CSI-RS are multiplexed on the same time-frequency resources using Code Division Multiple Access (CDM). In the above configuration, cdm-Type is configured by the network device to the terminal device through downlink parameters. CDMN-FDN1-TDN2 indicates that the total length of the code division multiple access is N, where the length of the frequency domain code division multiple access is N1 and the length of the time domain code division multiple access is N2, where N = N1 × N2, k i This indicates the starting position of the CSI-RS resource in the frequency domain, i = 0, 1, 2, 3. l0 and l1 represent the starting positions of the CSI-RS resource in the time domain, configured by the network device, k ′This represents the frequency domain offset of the time-frequency resources used by different ports within the same CDM group; ′ This indicates the time-domain offset of the time-frequency resources used by different ports within the same CDM group. FD-CDM2 indicates that code division multiplexing is performed only in the frequency domain, and the total length of the code division multiple access is 2. noCDM indicates that code division multiplexing is not performed.

[0146] As an example, when associating the port group of each CSI-RS resource in the CSI-RS resource set configured in the network device with the TCI state, the port groups corresponding to the CSI-RS resources in the CSI-RS resource set can be divided in any of the following ways:

[0147] In the first approach, when the number of CDM groups included in the first CSI-RS resource is greater than 1, the ports included in the first half of the CDM groups in the first CSI-RS resource are associated with the first TCI state, and the ports included in the second half of the CDM groups in the first CSI-RS resource are associated with the second TCI state. The number of ports included in the first half of the CDM groups is the same as the number of ports included in the second half of the CDM groups.

[0148] In the first example, when the number of CDM groups in the first CSI-RS resource is even, for example, the first CSI-RS resource includes J CDM groups, where J is an integer greater than 1; the first CDM group set associated with the first TCI state includes J1 CDM groups, where the J1 CDM groups are the 1st to the J1st CDM groups among the J CDM groups; the second CDM group set associated with the second TCI state includes J1 CDM groups, where the J1 CDM groups are the J-J1+1th to the Jth CDM groups among the J CDM groups, where J1 = J / 2.

[0149] For example, CDM group indexes can be used to identify CDM groups associated with different TCI states. For instance, using index numbers starting from 0, when J is even, the index numbers for the J CDM groups are 0 to J-1. The CDM group index is 0 to... The port in the CDM group is associated with the first TCI state, and the CDM group index is The port in the CDM group to J-1 is associated with the second TCI state.

[0150] In the second example, when the number of CDM groups in the first CSI-RS resource is odd, taking the example that the first CSI-RS resource includes J CDM groups, where J is an odd number greater than 1, the first CDM group set associated with the first TCI state includes J1 CDM groups, where the J1 CDM groups are the 1st to the J1st CDM groups among the J CDM groups. The second CDM group set associated with the second TCI state includes J1 CDM groups, where the J1 CDM groups are the (J-J1)th to the (J-1)th CDM groups among the J CDM groups. For example, if J=5, the first and second CDM groups are associated with the first TCI state, and the third and fourth CDM groups are associated with the second TCI state.

[0151] For example, CDM group indexes can be used to identify CDM groups associated with different TCI states. For instance, using index numbers starting from 0, when J is odd, the CDM group index ranges from 0 to... The port in the CDM group is associated with the first TCI state, and the CDM group index is The port in the CDM group to J-1 is associated with the second TCI state.

[0152] In the third example, when the number of CDM groups in the first CSI-RS resource is odd, taking the example that the first CSI-RS resource includes J CDM groups, where J is an odd number greater than 1, the first CDM group set associated with the first TCI state includes J1 CDM groups. These J1 CDM groups are the 2nd to J1+1th CDM groups among the J CDM groups. The second CDM group set associated with the second TCI state includes J1 CDM groups. These J1 CDM groups are the J-J1+1th to Jth CDM groups among the J CDM groups. For example, if J=5, the second and third CDM groups are associated with the first TCI state, and the fourth and fifth CDM groups are associated with the second TCI state.

[0153] For example, CDM group indexes can be used to identify CDM groups associated with different TCI states. For instance, using index numbers starting from 0, when J is odd, the CDM group index is 1 to... The port in the CDM group is associated with the first TCI state, and the CDM group index is The port in the CDM group to J-1 is associated with the second TCI state.

[0154] In the fourth example, when the number of CDM groups in the first CSI-RS resource is odd, we still take the example of the first CSI-RS resource containing J CDM groups, where J is an odd number greater than 1. The first CDM group set associated with the first TCI state includes J1 CDM groups, and the J1 CDM groups in the first CDM group set are the 1st to the J1st CDM groups among the J CDM groups. The second CDM group set associated with the second TCI state includes J1 CDM groups, and the J1 CDM groups in the second CDM group set are the J-J1+1th to the Jth CDM groups among the J CDM groups. For example, if J = 5, the first and second CDM groups are associated with the first TCI state, and the fourth and fifth CDM groups are associated with the second TCI state. For instance, CDM group indices can be used to determine which CDM groups are associated with different TCI states. For example, using index numbers starting from 0, when J is odd, the CDM group index is 0 to... The port in the CDM group is associated with the first TCI state, and the CDM group index is The port in the CDM group to J-1 is associated with the second TCI state.

[0155] In the second approach, when the number of port groups included in the CSI-RS resource is odd, the CSI-RS is associated with only one TCI state. When the number of port groups included in the CSI-RS resource is even, the CSI-RS resource can be associated with two TCI states. Taking the first CSI-RS resource as an example again, since the number of port groups included in the first CSI-RS resource is even, it can be associated in a manner similar to CDM groups as described in the first example above.

[0156] As an example, the CSI-RS resources associated with two TCI states can use any configuration under Row = {4,5,6,7,8,9,10,11,12,13,14,15,16,17,18} in Table 1. The CSI-RS resources associated with one TCI state can use any configuration in Table 1. The configuration under Row = {1,2,3} in Table 1 can only associate with one TCI state, mainly for the following reasons: the NR CSI-RS resources corresponding to Rows = 1 and 2 have only 1 port, which is clearly insufficient to meet the requirement of configuring two TCI states; while the CSI-RS resource corresponding to Row = 3 has 2 ports, but these two ports are multiplexed on the same time-frequency resource through orthogonal masks. If the two ports are associated with different TCI states, the orthogonality will be destroyed, and strong interference will occur between these two ports, affecting the performance of channel estimation. Therefore, in this embodiment, the CSI-RS resource corresponding to Row = 3 is associated with only one TCI state. CSI-RS resources that associate two TCI states can be associated with different TCI states in any of the possible ways described in the first to fourth examples above.

[0157] In the third approach, the time-frequency resources corresponding to port groups associated with different TCI states in the CSI-RS resources of two TCI states are located on different time units. The time unit can be a slot, a symbol, or a mini-slot, etc.

[0158] As an example, in this approach, the CSI-RS resources associated with two TCI states can use any of the configurations under Row = {5,7,11,13,14,16,17} in Table 1. Since the NR system operates in millimeter-wave bands, to combat severe large-scale fading, network and terminal devices need to employ analog precoding on the radio frequency, i.e., using phased arrays to implement analog beams. However, due to cost constraints, terminal devices often cannot simultaneously use two different analog beams to receive two signals. Since the CSI-RS resources associated with Row = {4,6,8,9,10,12,15,18} use resources on the same symbol for different ports, it may be necessary for the terminal device to support the simultaneous use of two different analog beams to receive two signals. Therefore, the CSI-RS resources associated with two TCI states do not need to use the configuration under Row = {4,6,8,9,10,12,15,18}. For any CSI-RS resource associated with Row = {5,7,11,13,14,16,17}, taking J as an example, the CDM group index is 0 to... The time-frequency resources mapped to the ports in the CDM group are related to the CDM group index. The time-frequency resources mapped to the ports in the CDM group of J-1 are on different symbols.

[0159] In the fourth approach, when either of the two TCI states associated with a CSI-RS resource contains a QCL type of Type D, the time-frequency resources corresponding to the port groups associated with different TCI states in the CSI-RS resource are located on different time units. The method of associating different port groups of CSI-RS resources with different TCI states can be found in the relevant description in the first approach, and will not be repeated here. As an example, in this approach, when either of the two TCI states contains a QCL type of Type D, the CSI-RS resource associated with the two TCI states can use any configuration under Row = {5,7,11,13,14,16,17} in Table 1. When neither of the two TCI states contains a QCL type that is Type D, the CSI-RS resource associated with the two TCI states can use any one of the configurations under Row = {4,5,6,7,8,9,10,11,12,13,14,15,16,17,18} in Table 1.

[0160] When the QCL type in a TCI state does not include Type D, Type D is used to indicate the reception of an analog beam. If the QCL type in a TCI state does not include Type D, the terminal device can use the same analog beam or operate in a low-frequency band. The terminal device does not need to use different analog beams to receive signals on different ports within the CSI-RS resource. Based on this, there is no restriction that the time-frequency resources mapped to port groups associated with different TCIs are located in different time units. In other words, when neither of the QCL types in two TCI states includes Type D, the time-frequency resources corresponding to port groups associated with different TCI states in the CSI-RS resource can be located in the same time unit or different time units.

[0161] In the fifth approach, the time-frequency resources corresponding to port groups associated with different TCI states in the CSI-RS resources of two TCI states are located in different time units, and the time-frequency resources corresponding to port groups associated with different TCI states are not adjacent in the time domain. Since the time-frequency resources corresponding to port groups associated with different TCI states are adjacent in the time domain, the analog beam switching requirements may not be met. The method of associating different port groups of CSI-RS resources of two TCI states with different TCI states can be the same as described in the first approach.

[0162] As an example, in this approach, the CSI-RS resources associated with two TCI states can use any of the configurations under Row = {13, 14, 16, 17} in Table 1. However, in the CSI-RS resources associated with Row = {4, 6, 8, 9, 10, 12, 15, 18}, the resources used by different ports are on the same symbol. This does not meet the requirement that the time-frequency resources corresponding to port groups associated with different TCI states should be located in different time units. For details, please refer to the relevant description in the third approach. Therefore, the CSI-RS resources associated with two TCI states do not need to use the configuration under Row = {4, 6, 8, 9, 10, 12, 15, 18}.

[0163] In this method, a CSI-RS resource configured with Row = {5,7,11} is associated with only one TCI state. Taking any CSI-RS resource with Row = {5,7,11} containing J port groups as an example, in the CSI-RS resource configured with Row = {5,7,11}, the CDM group index is from 0 to... The time-frequency resources mapped to the ports in the CDM group are related to the CDM group index. The time-frequency resources mapped to ports in the CDM group to J-1 are on different symbols, but are adjacent in the time domain, i.e., CDM group index 0 to... The symbol for the time-frequency resources mapped to the ports in the CDM group is l0, and the CDM group index is... The time-frequency resources mapped to the ports in the CDM group of J-1 are located in symbol l0+1. If either of the two TCI states contains a QCL type of Type-D, the terminal device needs to immediately use another analog beam to receive a new OFDM signal on the following symbol l0+1 after receiving the orthogonal frequency division multiplexing (OFDM) signal on symbol l0. Even considering only the addition of a cyclic prefix (CP) to the OFDM signal on each symbol, completing the analog beam switching within one CP duration is very challenging for some terminal devices. The time-frequency resources corresponding to port groups associated with different TCI states in the CSI-RS resources of the two TCI states are not contiguous in the time domain, which can adapt to the terminal device's analog beam switching requirements. More specifically, since the CDM group index is from 0 to... The time-frequency resources mapped to ports in a CDM group may occupy multiple consecutive OFDM symbols, and the same CDM group index is... The time-frequency resources mapped to ports in the CDM group to J-1 may occupy multiple consecutive OFDM symbols. Therefore, in order to meet the switching requirements of terminal equipment for analog beams, the CDM group index is 0 to... The last OFDM symbol corresponding to the time-frequency resource mapped by the port in the CDM group is the CDM group index. The first OFDM symbol corresponding to the time-frequency resource mapped to the port in the CDM group of J-1 is not adjacent.

[0164] In the sixth method, if the QCL type of any one of the two TCI states associated with a CSI-RS resource includes Type D, then the time-frequency resources corresponding to the port groups associated with different TCI states in the CSI-RS resources of the two associated TCI states are located in different time units and are not adjacent in the time domain.

[0165] As an example, in this approach, when either of the two TCI states includes a QCL type of Type D, the CSI-RS resources associated with the two TCI states can use any configuration under Row = {13, 14, 16, 17} in Table 1. However, in the CSI-RS resources associated with Row = {4, 6, 8, 9, 10, 12, 15, 18}, the resources used by different ports are on the same symbol. This does not meet the requirement that the time-frequency resources corresponding to port groups associated with different TCI states are located in different time units. For details, please refer to the relevant description in the third approach. Therefore, the CSI-RS resources associated with the two TCI states do not need to use the configuration under Row = {4, 6, 8, 9, 10, 12, 15, 18}. The CSI-RS resource configuration corresponding to Row = {5,7,11} does not meet the requirement that the time-frequency resources corresponding to different port groups are located in different time units and are not adjacent in the time domain. Therefore, the CSI-RS resources associated with two TCI states do not need to use the configuration under Row = {5,7,11}. For detailed explanations, please refer to the relevant description in the fifth method, which will not be repeated here.

[0166] In the seventh method, if either of the two TCI states associated with a CSI-RS resource includes a QCL type of Type D, then the time-frequency resources corresponding to the port groups associated with different TCI states in the CSI-RS resources of the two associated TCI states are located in different time units, and the number of time units spaced in the time domain is greater than or equal to the capability parameters reported by the terminal device. The capability parameters reported by the terminal device can be used to indicate the delay required for analog beam switching. The capability parameters reported by the terminal device can be parameters independently reported by the terminal device, or they can be capability parameters specified by existing protocols. For example, the capability parameter FG2-28 A-CSI-RS beam switching timing in NR allows the network device to obtain the minimum time interval between obtaining downlink control information (DCI) and obtaining AP-CSI-RS. Since the terminal device may use an analog beam to receive the DCI and AP-CSI-RS sent by the network device, and different analog beams are used for receiving these two signals, a certain delay is required for beam switching. Therefore, upon receiving the DCI, there is sufficient time to switch the analog beam for receiving AP-CSI-RS.

[0167] As an example, in this approach, if either of the two TCI states includes a QCL type of Type D, the CSI-RS resources associated with the two TCI states can use any of the configurations under Row = {13, 14, 16, 17} in Table 1. This is because the CSI-RS resources associated with Row = {4, 6, 8, 9, 10, 12, 15, 18} do not meet the requirement that the time-frequency resources corresponding to port groups associated with different TCI states are located in different time units. For details, please refer to the relevant description in the third approach. Therefore, the CSI-RS resources associated with the two TCI states do not need to use the configuration under Row = {4, 6, 8, 9, 10, 12, 15, 18}. The CSI-RS resource configuration corresponding to Row = {5,7,11} does not meet the requirement that the time-frequency resources corresponding to different port groups are located in different time units and the time domain interval is greater than or equal to the reporting capability parameter of the terminal device. Therefore, the CSI-RS resources associated with two TCI states do not need to use the configuration under Row = {5,7,11}. More specifically, since the CDM group index is 0 to... The time-frequency resources mapped to ports in a CDM group may occupy multiple consecutive OFDM symbols, and the same CDM group index is... The time-frequency resources mapped to ports in the CDM group to J-1 may occupy multiple consecutive OFDM symbols. Therefore, in order to meet the switching requirements of terminal equipment for analog beams, the CDM group index is 0 to... The last OFDM symbol corresponding to the time-frequency resource mapped by the port in the CDM group is the CDM group index. The spacing between the first OFDM symbols corresponding to the time-frequency resources mapped to the ports in the J-1 CDM group must be greater than or equal to the capability parameters reported by the terminal device. For detailed explanations, please refer to the relevant descriptions in the fifth method; they will not be repeated here.

[0168] Since there are no restrictions on the CSI-RS resources associated with a TCI state, the configuration of any row in Table 1 can be used to associate a CSI-RS resource with a TCI state in any of the above methods.

[0169] In another possible implementation, when configuring the network device to associate different port groups in the same CSI-RS resource with two TCI states, the ports associated with different TCI states can be set according to the CDM group method as described above, or they can be determined directly according to the port identifier.

[0170] As an example, taking the first CSI-RS resource as an example, the ports with odd-numbered port identifiers in the ports corresponding to the first CSI-RS resource form the first port group, which is associated with the first TCI state; the ports with even-numbered port identifiers form the second port group, which is associated with the second TCI state.

[0171] As another example, taking the first CSI-RS resource as an example, the subset of the port group consisting of ports with odd-numbered port identifiers in the ports corresponding to the first CSI-RS resource is the first port group, which is associated with the first TCI state; the subset of the port group consisting of ports with even-numbered port identifiers is the second port group, which is associated with the second TCI state; furthermore, the configuration of the ports in the subset can be configured by the network device to the terminal device.

[0172] S202, after receiving the CSI-RS resource configuration information from the network device, the terminal device performs CSI measurement based on the CSI-RS resource configuration information.

[0173] S203, the terminal device reports CSI to the network device.

[0174] CSI can be measured by the terminal device on each CSI-RS resource according to the CSI-RS resource set configured by the network device.

[0175] In one possible approach, CSI may include two parts: the first part includes the optimal measurement result obtained by the terminal device from CSI-RS resource measurements associated with one TCI state in the CSI-RS resource set; the second part includes the optimal measurement result obtained by the terminal device from CSI-RS resource measurements associated with two TCI states in the CSI-RS resource set.

[0176] As an example, a CSI-RS resource set includes K CSI-RS resources. K1 of these K CSI-RS resources are associated with one TCI state, and the remaining K-K1 CSI-RS resources are associated with two TCI states. For instance, if the K-K1 CSI-RS resources include a first CSI-RS resource, and the measurement obtained from the first CSI-RS resource is optimal, then the CSI includes the first CSI parameter measured from the first CSI-RS resource. If the K1 CSI-RS resources include a second CSI-RS resource, and the measurement obtained from the second CSI-RS resource is optimal, then the CSI also includes the second CSI parameter measured from the second CSI-RS resource. The CSI measurements reported by the terminal device include not only CRI, but also rank indication (RI), precoding matrix indicator (PMI), channel quality indicator (CQI), wideband PMI(i1), layer indicator (LI), synchronization signal block index (SSB Index), layer 1 reference signal received power (L1-RSRP), layer 1 reference signal received power (L1-RSRP), and layer 1 reference signal receiving quality (L1-RSRQ). The first CSI parameter includes one or more of the following measurements: CRI, PI, PMI, CQI, SSB index, LI, L1-RSRP, or L1-RSRQ. The second CSI parameter includes one or more of the following measurements: CRI, PI, PMI, CQI, SSB index, LI, L1-RSRP, or L1-RSRQ. For ease of distinction, the CRI included in the first CSI parameter is referred to as the first CRI, and the CRI included in the second CSI parameter is referred to as the second CRI.For example, the first CSI parameter includes a first CSI-RS resource indicator (CSI-RS resource Indicator, CRI), the CSI-RS resource indicated by the first CRI is the first CSI-RS resource. In addition to the first CRI, the first CSI parameter also includes other CSI parameters (such as RI, PMI, CQI, LI, L1-RSRP, or L1-RSRQ), which are measured on the first CSI-RS resource. The second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the second CSI-RS resource. In addition to the second CRI, the second CSI parameter also includes other CSI parameters (such as RI, PMI, CQI, SSB index, LI, L1-RSRP, or L1-RSRQ), all of which are measured on the second CSI-RS resource.

[0177] The CSI reported by the terminal device in this embodiment includes two parts. When the terminal device measures CSI based on a CSI-RS resource associated with two TCI states, it actually assumes that both TRPs are serving it simultaneously, which can obtain a better CSI measurement result. When using multi-TRP scheduling, this prevents interference between transmissions between different TRPs. Furthermore, the measurement result assuming that two TRPs are serving the terminal device simultaneously better reflects the overall channel state between the two TRPs and the terminal device, improving system performance. The terminal device also measures CSI on a CSI-RS resource associated with one TCI-state, which can reflect the channel state between one TRP and the terminal device, increasing the possibility of the terminal device using single-TRP scheduling.

[0178] In another possible approach, CSI may include a subset. CSI includes the optimal measurement result obtained by the terminal device from CSI-RS resource measurements within the CSI-RS resource set. The optimal measurement result may be the CSI measurement result on CSI-RS resources associated with one TCI-state, or it may be the CSI measurement result obtained from CSI-RS resources associated with two TCI states.

[0179] It should be noted that the method by which the terminal device performs CSI measurement and reports CSI is related to the transmission mode. The transmission modes include: multi-TRP transmission based on multiple DCI (mDCI mTRP), and one or more of Scheme 1a, Scheme 2a, Scheme 2b, Scheme 3, or Scheme 4 for single DCI multi-TRP. In the embodiments of this application, different CSI-RS resources can use the same CSI measurement and CSI reporting method, or they can use different CSI measurement and CSI reporting methods. That is, different CSI-RS resources can correspond to different transmission modes, or different transmission modes.

[0180] As an optional implementation, before step S202, the network device may send mode indication information to the terminal device. Taking an example where the CSI-RS resource set includes N CSI-RS resources, the mode indication information indicates that each of the N CSI-RS resources in the CSI-RS resource set is associated with one of M transmission modes. The M transmission modes may include mDCI mTRP, Scheme 1a, Scheme 2a, Scheme 2b, Scheme 3, or Scheme 4 (single DCI multiple TRP). N is an integer greater than 1, and M is a positive integer less than or equal to N.

[0181] In one possible approach, the mode indication information can be included in the CSI-RS reported configuration information. Specifically, the network device sends CSI-RS reported configuration information to the terminal device, and the CSI-RS reported configuration information includes the mode indication information.

[0182] In another possible approach, the network device can send the pattern indication information to the terminal device via separate RRC signaling.

[0183] In a CSI-RS resource set, different CSI-RS resources among N CSI-RS resources can use the same transmission mode, or different CSI-RS resources among N CSI-RS resources can use different transmission modes.

[0184] In one example, N CSI-RS resources use the same transmission mode. The mode indication information may include an indication, which, for ease of description, will be referred to as indication 1. Indication 1 indicates the identifier of the transmission mode commonly used by the N CSI-RS resources. For example, the identifier of the transmission mode could be an index value of the transmission mode or the name of the transmission mode. When the terminal device performs CSI measurements on all CSI-RS resources within the set of CSI-RS resources associated with the CSI, it performs CSI measurements and reports according to the transmission mode indicated by the transmission mode information.

[0185] In another example, the mode indication information is used only to indicate the transmission mode corresponding to CSI-RS resources associated with two TCI states. In one case, different CSI-resources associated with two TCI states have the same transmission mode; the mode indication information may include one indication, called indication 1, which indicates the transmission mode corresponding to the CSI-RS resources associated with two TCI states out of N CSI-RS resources. In another case, different CSI-resources associated with two TCI states may have different transmission modes. As an example, if the number of CSI-RS resources associated with two TCI states is n1, the mode indication information may include n1 indications, each corresponding one-to-one with one of the n1 CSI-RS resources. For instance, the order of the n1 indications in the mode indication information corresponds one-to-one with the order of the n1 CSI-RS resources in the CSI-RS set. Taking n1 = 2 as an example, the order of the two CSI-RS resource IDs is {csiResourceID1, csiResourceID2}. Indication 1 and Indication 2 have two transmission modes, txMode1 and txMode2, respectively. The order of these two transmission modes in the mode indication information is {txMode1, txMode2}. This determines that the CSI-RS resource corresponding to csiResourceID1 is associated with txMode1, and the CSI-RS resource corresponding to csiResourceID2 is associated with txMode2. Alternatively, the mode indication information can include the association between n1 CSI-RS resources and their corresponding transmission modes, with the mode indication information including {csiResourceID1, txMode1} and {csiResourceID2, txMode2}.

[0186] In another example, among N CSI-RS resources, the CSI-RS resources associated with one TCI state have the same transmission mode, and the CSI-RS resources associated with two TCI states have the same transmission mode. The transmission mode of the CSI-RS resources associated with one TCI state differs from the transmission mode of the CSI-RS resources associated with two TCI states. In this case, the mode indication information may include Indication 1 and Indication 2. Indication 1 indicates the transmission mode of the CSI-RS resource associated with one TCI state, and Indication 2 indicates the transmission mode of the CSI-RS resource associated with two TCI states. The two transmission modes of Indication 1 and Indication 2 are txMode1 and txMode2, respectively. txMode1 and txMode2 can be included in the mode indication information in the following order: {txMode1, txMode2}, or {txMode2, txMode1}.

[0187] In another example, the mode indication information includes N indications, which correspond one-to-one with N CSI-RS resources in the CSI-RS resource set in sequence. For example, the CSI-RS resource set contains 4 CSI-RS resources with IDs {csiResourceID1, csiResourceID2, csiResourceID3, csiResourceID4}. The mode indication information indicates that the transmission modes of the 4 CSI-RS resources are {txMode1, txMode2, txMode3, txMode4}. Then, the CSI-RS resource corresponding to csiResourceID1 is associated with txMode1, the CSI-RS resource corresponding to csiResourceID2 is associated with txMode2, the CSI-RS resource corresponding to csiResourceID3 is associated with txMode3, and the CSI-RS resource corresponding to csiResourceID4 is associated with txMode4. It should be noted that, in this example, the transmission modes corresponding to the N CSI-RS resources can be the same or different, or some of the N CSI-RS resources can have the same transmission mode.

[0188] In another example, the network device can determine the number of indications included in the mode indication information based on the number of transmission modes corresponding to the N CSI-RS resources. For instance, when all N CSI-RS resources correspond to the same transmission mode, the mode indication information includes only one indication to indicate that identical transmission mode. When the N CSI-RS resources do not correspond to all of the same transmission mode, the mode indication information can include N indications, each indicating a transmission mode for one of the N CSI-RS resources.

[0189] In another example, when the mode indication information is used to indicate the transmission mode corresponding to CSI-RS resources associated with two TCI states, the network device can determine the number of indications included in the mode indication information based on the number of transmission modes corresponding to the CSI-RS resources associated with two TCI states out of N CSI-RS resources. For example, if n1 CSI-RS resources are associated with two TCI states out of N CSI-RS resources, and the transmission modes corresponding to the n1 CSI-RS resources are all the same, the mode indication information may include only one indication for that same transmission mode. When the transmission modes corresponding to the n1 CSI-RS resources are not all the same, the mode indication information may include n1 indications, each of which is used to indicate the transmission mode corresponding to the n1 CSI-RS resources associated with two TCI states.

[0190] It's important to note that in CSI measurements, a suitable PMI needs to be selected. The selection process involves determining the received signal-to-interference-noise ratio (SINR) based on candidate PMIs, calculating the received data rate based on the SINR, comparing the received data rates corresponding to each candidate PMI, and reporting the PMI that achieves the highest received data rate among the measured PMIs. CQI, on the other hand, is the quantized value of the received SINR corresponding to the reported PMI. RI is used to indicate the effective data layer number of the PDSCH. RI is used to inform network devices of the number of codewords (CWs) currently supported by the terminal device.

[0191] The following describes the procedure for performing CSI measurements under different transmission mode assumptions, using mDCI, mTRP, and Scheme 2a / 2b as examples. See [link to documentation]. Figure 3 As shown, two TRPs are used as examples, namely TRP1 and TRP2.

[0192] First, we will explain how to perform CSI measurements in mDCI and mTRP modes.

[0193] The terminal device receives CSI-RS resources from TRP1 and TRP2 respectively through CSI-RS resource configuration information, and estimates the corresponding channel matrices H1 and H2 respectively. When estimating PMI1 (information used to indicate the optimal precoding matrix when TRP1 is transmitted) and PMI2 (information used to indicate the optimal precoding matrix when TRP2 is transmitted), the SINR1 corresponding to the received TRP1 is given by formula (2), and the SINR2 corresponding to the received TRP2 is given by formula (3).

[0194]

[0195] Where P1 and P2 represent the precoding matrices corresponding to candidate PMI1 and PMI2, respectively, and I represents other interference. In the above formulas (2) and (3), the signal from TRP1 is an interference signal for the reception of TRP2 signal. Therefore, when calculating the SINR2 of TRP2, the signal from TRP1 needs to be considered as interference. Similarly, the signal from TRP2 is also an interference signal for the reception of TRP1 signal. Therefore, when calculating the SINR1 of TRP1, the signal from TRP2 needs to be considered as interference. After calculating the SNR of the two TRPs on each CSI-RS resource, the received data rate of the two TRPs can be further determined, thereby obtaining the PMI with the highest received data rate for each TRP, and then determining the CQI. The optimal PMI, CQI, and RI are obtained for each TRP.

[0196] Next, we will explain how to perform CSI measurements in Scheme 2a / 2b mode.

[0197] When estimating PMI1 and PMI2, a received SINR is obtained from a CSI-RS resource measurement. The received SINR can be determined by the following formula (4):

[0198]

[0199] In the above formula, the signals from TRP1 and TRP2 are both useful signals, not interference.

[0200] As can be seen from the above analysis, the CSI estimation method is different when different transmission modes are assumed.

[0201] After determining the transmission mode of each CSI-RS resource in the CSI-RS resource set, the terminal device performs CSI measurements on the CSI-RS resources included in the CSI-RS resource set according to the transmission mode, and reports the CSI to the network device. The CSI parameters included in the reported CSI are related to the transmission mode.

[0202] As an example, see Table 2, which describes the CSI parameters included in the reported CSI for different transmission modes.

[0203] Table 2

[0204] Sending mode Reported CSI parameters mDCI mTRP 1 CRI, 2 RI, 2 PMI, 2 CQI sDCI mTRP / Scheme 1a 1 CRI, 2 RIs, 2 PMIs, 1 CQI Scheme 2a / Scheme 2b / Scheme 3 / Scheme 4 1 CRI, 1 RI, 2 PMIs, 1 CQI

[0205] In addition to determining which measurements (or CSI parameters) are included in the CSI reported by the terminal device based on the transmission mode, as another possible implementation, the network device may also instruct the terminal device which measurements are included in the CSI reported by the terminal device.

[0206] In one example, the network device can send a first configuration parameter and a second configuration parameter to the terminal device. The first configuration parameter indicates the measurement quantity of a CSI-RS resource associated with one TCI state in the CSI-RS resource set. The second configuration parameter indicates the measurement quantity of a CSI-RS resource associated with two TCI states in the CSI-RS resource set. For example, the first configuration parameter can also be called reportQuantity, and the second configuration parameter can also be called reportQuantityExt.

[0207] In another example, the network device sends a third configuration parameter to the terminal device. The first part of the third configuration parameter indicates the measurement quantity of a CSI-RS resource associated with one TCI state within the CSI-RS resource set, and the second part indicates the measurement quantity of a CSI-RS resource associated with two TCI states within the CSI-RS resource set. The third configuration parameter can also be called `reportQuantity`. For example, the first and second parts of the field do not overlap and together constitute the third configuration parameter. Another example is that the second part of the field includes the first part of the field; for instance, the second part of the field could be the entire third configuration information, and the first part of the field is a portion of the third configuration parameter. For example, if reportQuantity = 'CRI-RI-PMI-CQI-PMI', the measurement quantity in the CSI-RS resource associated with one TCI state in the associated CSI-RS resource set is 'CRI-RI-PMI-CQI', and the measurement quantity in the CSI-RS resource associated with two TCI states in the CSI-RS resource set is 'CRI-RI-PMI-CQI-PMI'. This can be understood as reporting two PMIs, one CRI, one RI, and one CQI.

[0208] The second possible implementation is described in detail below with reference to specific embodiments. Different CSI-RS resources belonging to the same CSI-RS resource group are configured to be associated with different TCI-States on the terminal device, or described as different CSI-RS resources belonging to the same CSI-RS resource group being associated with different TRPs on the terminal device. See [link to documentation] Figure 4 As shown.

[0209] S401, the network device sends CSI-RS resource configuration information to the terminal device. The CSI-RS resource configuration information includes a set of CSI-RS resources for channel measurement, which contains one or more CSI-RS resources. The CSI-RS resources in the CSI-RS resource set can be located in different CSI-RS resource groups or in the same CSI-RS resource group. The CSI-RS resources included in a CSI-RS resource group can be associated with different TCI-states. Taking a first CSI-RS resource group as an example, the first CSI-RS resource group includes a first CSI-RS resource and a second CSI-RS resource. The first CSI-RS resource is associated with a first transmission configuration indication state, the second CSI-RS resource is associated with a second transmission configuration indication state, and the first CSI-RS resource is associated with the second CSI-RS resource. The first CSI-RS resource and the second CSI-RS resource are associated (or bound). The bound CSI-RS resource is the CSI-RS resource allocated to a terminal device for communication with multiple TRPs in a multi-TPR scenario. In other words, the binding relationship is used to indicate that CSI measurements are performed jointly on the two bound CSI-RS resources.

[0210] As an example, the first CSI-RS resource group may also include other CSI-RS resources associated with the first TCI state. The first CSI-RS resource group may also include other CSI resources associated with the second TCI state.

[0211] In one possible implementation, the binding relationship between the different CSI-RS resources can be indicated to the terminal device by the network device.

[0212] In one example, a network device can use a bitmap to indicate to an end device the binding relationships between CSI-RS resources included in a CSI-RS resource group. The length of the bitmap is equal to the number of CSI-RS resources contained in the CSI-RS resource group. Each bit in the bitmap is sequentially associated with each CSI-RS resource in the CSI-RS resource group. CSI-RS resources with corresponding bit values ​​set to a specific value are bound together to form a CSI-RS resource group. For example, a CSI-RS resource group may contain four CSI-RS resources: {csiRSResource1, csiRSResource2, csiRSResource3, csiRSResource4}. Taking a set value of 1 as an example, if the network device configures the bitmap to the end device as '0011', it indicates that csiRSResource3 and csiRSResource4 are bound together. For example, if the bitmap configured by the network device for the terminal device is '1111', it indicates that the CSI-RS resources associated with different TCI states in csiRSResource1, csiRSResource2, csiRSResource3, and csiRSResource4 have binding relationships. For instance, if csiRSResource1 and csiRSResource2 are both associated with the first TCI state, and csiRSResource3 and csiRSResource4 are both associated with the second TCI state, then csiRSResource1 and csiRSResource3 are bound together, csiRSResource2 and csiRSResource4 are bound together, csiRSResource2 and csiRSResource3 are bound together.

[0213] In another example, the CSI-RS resource configuration information sent by the network device to the terminal device includes information cells indicating binding relationships. These information cells include identifiers of the CSI-RS resources with binding relationships. For example, a CSI-RS resource set may contain four CSI-RS resources: {csiRSResource1, csiRSResource2, csiRSResource3, csiRSResource4}. If the information cell includes {csiRSResourceID1, csiRSResourceID2}, it indicates that csiRSResource1 and csiRSResource2 have a binding relationship. As another example, a CSI-RS resource set may contain six CSI-RS resources: {csiRSResource1, csiRSResource2, csiRSResource3, csiRSResource4, csiRSResource5, csiRSResource6}. If the information element can include {csiRSResourceID1, csiRSResourceID2} and {csiRSResourceID5, csiRSResourceID6}, it means that csiRSResource1 and csiRSResource2 are bound together, and csiRSResource5 and csiRSResource6 are bound together.

[0214] In another example, two CSI-RS resources with a binding relationship constitute a CSI-RS resource group. A CSI-RS resource set can include one or more CSI-RS resource groups. CSI-RS resources that do not form a CSI-RS resource group are used in single TRP scenarios. For example, a CSI-RS resource set contains six CSI-RS resources: {csiRSResource1, csiRSResource2, csiRSResource3, csiRSResource4, csiRSResource5, csiRSResource6}. csiRSResource1 and csiRSResource2 are included in one CSI-RS resource group, each associated with a different TCI state; csiRSResource5 and csiRSResource6 are included in another CSI-RS resource group, each associated with a different TCI state. csiRSResource3 and csiRSResource4 have no binding relationship with other CSI-RS resources and are used only in single TRP scenarios.

[0215] In one possible implementation, the association between different CSI-RS resources in the CSI-RS resource group configured by the network device and the TCI state can be achieved in any of the following ways:

[0216] In the first possible example, different CSI-RS resources with binding relationships within a CSI-RS resource group occupy different time units. Taking the first CSI-RS resource group as an example, the first CSI-RS resource and the second CSI-RS resource in the first CSI-RS resource group occupy different time units.

[0217] In the second possible example, when the QCL Type of any TCI state associated with different CSI-RS resources in a CSI-RS resource group that have a binding relationship includes Type D, the time units occupied by the different CSI-RS resources with the binding relationship are different. Taking the first CSI-RS resource group as an example, when the first TCI state associated with the first CSI-RS resource or the second TCI state associated with the second CSI-RS resource includes Type D, the time units occupied by the first CSI-RS resource and the second CSI-RS resource in the first CSI-RS resource group are different.

[0218] In the third possible example, different CSI-RS resources with binding relationships within a CSI-RS resource group occupy different time units and are not adjacent in the time domain. Taking the first CSI-RS resource group as an example, the first CSI-RS resource and the second CSI-RS resource in the first CSI-RS resource group occupy different time units and are not adjacent in the time domain.

[0219] In the fourth possible example, when the QCL Type of any TCI state associated with different CSI-RS resources with binding relationships in the CSI-RS resource group includes Type D, the different CSI-RS resources with binding relationships occupy different time units and are not adjacent in the time domain.

[0220] In the fifth possible example, different CSI-RS resources with binding relationships in the CSI-RS resource group occupy different time units, and the number of time units between them in the time domain is greater than or equal to the capability parameters reported by the terminal device.

[0221] In the sixth possible example, when the QCL Type of any TCI state associated with different CSI-RS resources with binding relationships in the CSI-RS resource group includes Type D, the different CSI-RS resources with binding relationships occupy different time units, and the number of time units between them in the time domain is greater than or equal to the capability parameter reported by the terminal device.

[0222] S402, after receiving the CSI-RS resource configuration information, the terminal device performs CSI measurement.

[0223] S403, the terminal device reports CSI to the network device.

[0224] CSI can be measured by the terminal device on each CSI-RS resource and on the CSI-RS resource group according to the CSI-RS resource set configured by the network device.

[0225] In one possible approach, CSI may include two parts. The first part includes the optimal measurement result obtained by the terminal device from CSI-RS resources within a CSI-RS resource set. The second part includes the optimal measurement result obtained by the terminal device from multiple groups of CSI-RS resources with binding relationships. For example, the CSI-RS resource set includes eight CSI-RS resources, four of which are bound to each other in pairs, and these bound CSI-RS resources are associated with different TCI states. Then, the first part includes the optimal measurement result obtained by the terminal device from the eight CSI-RS resources, and the second part includes the optimal measurement result obtained by the terminal device from two groups of CSI-RS resources with binding relationships. For example, the optimal measurement result in the first part may be obtained from a third CSI-RS resource associated with a third transmission configuration indication state. The optimal measurement result in the first part may include a first CSI parameter. The first CSI parameter includes a first CRI, the CSI-RS resource indicated by the first CRI is the third CSI-RS resource, and the other parameters in the first CSI parameter besides the first CRI are determined on the third CSI-RS resource. For example, the optimal measurement result in the second part is obtained by measurement on the first CSI-RS resource group, or by joint measurement on the first CSI-RS resource and the second CSI-RS resource. The optimal measurement result in the second part may include a second CSI parameter, the second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group, and the other parameters in the second CSI parameter besides the second CRI are determined on the first CSI-RS resource group.

[0226] In another possible approach, CSI may include a subset. CSI includes the optimal measurement result obtained by the terminal device on CSI-RS resources within the CSI-RS resource set and on multiple groups of CSI-RS resources with binding relationships. The optimal measurement result may be the CSI measurement result on a CSI-RS resource associated with one TCI-state, or it may be the CSI measurement result obtained on CSI-RS resources associated with two TCI-states.

[0227] As an optional implementation, before step S402, the network device may provide mode indication information to the terminal device. Taking an example where the CSI-RS resource set includes N CSI-RS resources, the mode indication information is used to indicate that each of the N CSI-RS resources in the CSI-RS resource set is associated with one of M transmission modes. The M transmission modes may include mDCI mTRP, Scheme 1a, Scheme 2a, Scheme 2b, Scheme 3, or Scheme 4 (single DCI multiple TRP). N is an integer greater than 1, and M is a positive integer less than or equal to N. The method by which the mode indication information indicates the transmission mode can be found in the description of the first possible implementation, and will not be repeated here.

[0228] The third possible implementation method is described in detail below with reference to specific embodiments, where different CSI reporting configurations (CSI-reportConfig) configured for the terminal device are associated with different TRPs. See [link to documentation]. Figure 5 As shown.

[0229] S501, the network device sends a CSI reporting configuration group to the terminal device. The CSI reporting configuration group includes k CSI reporting configurations.

[0230] In one example, with k=2, two CSI reporting configurations (CSI-ReportConfig) correspond to different TCI states associated with their respective CSI-RS resource sets used for channel measurement. Taking the first and second CSI reporting configurations as an example, both are used to configure the method of reporting CSI to the terminal device. The first CSI reporting configuration is associated with the first CSI-RS resource set, and the second CSI reporting configuration is associated with the second CSI-RS resource set. The first CSI-RS resource set is associated with the first transmission configuration indication state, and the second CSI-RS resource set is associated with the second transmission configuration indication state. The first and second CSI reporting configurations are bound together.

[0231] In another example, the CSI-RS reporting configuration group contains k>2 CSI-ReportConfigs. The network device can further send indication information to the terminal device, indicating that there is a binding relationship between the first CSI reporting configuration and the second CSI reporting configuration among the k CSI-ReportConfigs. The first CSI reporting configuration is associated with a first CSI-RS resource set, and the second CSI reporting configuration is associated with a second CSI-RS resource set. The first CSI-RS resource set is associated with a first transmission configuration indication state, and the second CSI-RS resource set is associated with a second transmission configuration indication state.

[0232] In one possible implementation, the association between different CSI-RS resource sets configured in the network device and the TCI state can be achieved in any of the following ways:

[0233] In the first possible example, the time units occupied by the CSI-RS resource sets corresponding to the two CSI reporting configurations that have a binding relationship are different. Taking the first CSI-RS resource set and the second CSI-RS resource set as examples, the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0234] In the second possible example, when the QCL Type of any TCI state associated with one of the two CSI reporting configurations with a binding relationship includes Type D, the time units occupied by the CSI-RS resource sets corresponding to the two CSI reporting configurations with a binding relationship are different. Taking the first CSI-RS resource set and the second CSI-RS resource set as examples, when the QCL Type of any TCI state in the first TCI state associated with the first CSI-RS resource set and the second TCI state associated with the second CSI-RS resource set includes Type D, the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0235] In the third possible example, the two CSI reporting configurations with a binding relationship occupy different time units for their corresponding CSI-RS resource sets, and they are not adjacent in the time domain. Taking the first CSI-RS resource set and the second CSI-RS resource set as examples, the first CSI-RS resource set and the second CSI-RS resource set occupy different time units and are not adjacent in the time domain.

[0236] In the fourth possible example, when the QCL Type of any TCI state associated with the CSI-RS resource sets corresponding to the two CSI reporting configurations with a binding relationship includes Type D, the time units occupied by the CSI-RS resource sets corresponding to the two CSI reporting configurations with a binding relationship are different and not adjacent in the time domain.

[0237] In the fifth possible example, the two CSI reporting configurations with a binding relationship occupy different time units for their respective CSI-RS resource sets, and the number of time units between them in the time domain is greater than or equal to the capability parameters reported by the terminal device.

[0238] In the sixth possible example, when the QCL Type of any TCI state associated with the CSI-RS resource sets corresponding to the two CSI reporting configurations with a binding relationship includes Type D, the time units occupied by the CSI-RS resource sets corresponding to the two CSI reporting configurations with a binding relationship are different, and the number of time units between them in the time domain is greater than or equal to the capability parameter reported by the terminal device.

[0239] S502, after receiving the CSI reporting configuration group, the terminal device performs CSI measurement in the CSI-RS resource set associated with the CSI reporting configuration group.

[0240] S503, the terminal device reports CSI to the network device.

[0241] CSI can be measured on the CSI-RS resources included in the CSI-RS resource set corresponding to the two different CSI reporting configurations of the network device.

[0242] In one possible approach, the reported CSI can include two parts: one part consists of the optimal CSI measurement results obtained by the terminal device performing CSI measurements according to the two CSI reporting configurations configured by the network device, under each of the two CSI reporting configurations; that is, one part includes the optimal measurement result obtained by performing CSI measurements on the first CSI-RS resource set associated with the first CSI reporting configuration and the optimal measurement result obtained by performing CSI measurements on the second CSI-RS resource set associated with the second CSI reporting configuration. The other part consists of the optimal CSI measurement result obtained by the terminal device performing joint CSI measurements according to the two CSI reporting configurations configured by the network device, that is, the measurement result obtained by performing joint CSI measurements on the first CSI-RS resource set and the second CSI-RS resource set.

[0243] In another possible approach, the reported CSI includes the optimal CSI measurement result obtained by the terminal device performing joint CSI measurement based on the two CSI reporting configurations of the network device, that is, the measurement result obtained by performing joint CSI measurement on the first CSI-RS resource set and the second CSI-RS resource set.

[0244] As an optional implementation, in this embodiment of the application, the network device may select a resource configuration method that can be the first possible implementation method, the second possible implementation method, or the third possible implementation method, depending on the requirements or the port situation of the resources configured for the terminal device.

[0245] As an example, when the number of ports included in the CSI-RS resources configured by the network device for the terminal device is greater than 16, the second possible implementation method can be used for resource configuration. When the number of ports included in the CSI-RS resources configured by the network device for the terminal device is no more than 16, the first possible implementation method can be used for resource configuration.

[0246] When configuring resources using the first possible implementation, CSI measurements by the terminal device are simple to implement. However, the same CSI-RS resource (maximum 32 ports) is divided into two port groups. This means that in multi-TRP measurement mode, it is impossible to configure each TRP to perform CSI measurements using 32 ports. When configuring resources using the second possible implementation, this problem of not being able to perform CSI measurements using 32 ports for each TRP does not exist. Therefore, when the network device needs to associate two CSI-RS resources with different TCI states for the terminal device, at least one of these two CSI-RS resources must have 32 ports, and the configuration information for the association relationship between these two CSI-RS resources is sent to the terminal device according to the method of the second possible implementation.

[0247] As another alternative implementation method, in this embodiment of the application, the network device may send two CSI-RS resource configuration information to the terminal device in accordance with the first possible implementation method and the second possible implementation method.

[0248] Network devices can instruct terminal devices which of the two CSI-RS resource configuration settings to use for CSI measurement. In one example, the default resource configuration is used. The terminal device uses the default resource configuration to determine the CSI-RS resource configuration from the two CSI-RS resource configuration settings, and then performs CSI measurement and reporting using the CSI-RS resource configuration corresponding to the default configuration. The terminal device can determine which resource configuration setting to select based on the on / off status of the two resource configuration settings. The on / off status can be indicated to the terminal device by the network device via DCI.

[0249] In another example, when the network device sends a configuration instruction to the terminal device, the terminal device uses the resource configuration method indicated by the configuration instruction to determine the CSI-RS resource configuration information from the two CSI-RS resource configuration information, and uses the CSI-RS resource configuration information corresponding to the indicated resource configuration method to perform CSI measurement and reporting.

[0250] As another optional implementation method, in the embodiments of this application, the network device may perform CSI configuration on the terminal device according to at least two of the first possible implementation method, the second possible implementation method, or the third possible implementation method.

[0251] The network device can further instruct the terminal device which of the at least two implementation methods to use for CSI configuration of the terminal device.

[0252] In one example, a default CSI configuration is used. The terminal device selects the default CSI configuration from at least two options, and performs CSI measurements and reports using the CSI resource configuration information or CSI reporting configuration corresponding to the default CSI configuration. The terminal device can determine which CSI configuration to select based on the on / off status of the two CSI configuration options. The on / off status can be indicated to the terminal device by the network device via DCI.

[0253] In another example, when the network device sends a configuration instruction to the terminal device, the terminal device uses the CSI configuration method indicated by the configuration instruction to determine one of the at least two CSI configuration methods, and uses the CSI-RS resource configuration information or CSI reporting configuration corresponding to the indicated CSI configuration method to perform CSI measurement and reporting.

[0254] Figure 6This is a schematic block diagram of a communication device 600 provided in an embodiment of this application. The communication device 600 includes a processing module 610, a receiving module 630, and a transmitting module 620. The receiving module 630 and / or the transmitting module 620 can be referred to as communication modules. The receiving module 630 and the transmitting module 620 can be separately configured or integrated. In one example, the transmitting module 620 can be a transmitter, and the receiving module 630 can be a receiver. The transmitter may include an antenna and radio frequency circuits, and the receiver may also include an antenna and radio frequency circuits. The transmitter and receiver can belong to the same functional module, such as a transceiver, or they can be independent functional modules. The processing module 610 can be a processor, such as a baseband processor, which may include one or more central processing units (CPUs). In another example, the transmitting module 620 and the receiving module 630 can be radio frequency units, and the processing module 610 can be a processor, such as a baseband processor. In another example, the transmitting module 620 and the receiving module 630 can be input / output interfaces of a chip (e.g., a baseband chip). For example, the transmitting module 620 may be an output interface, and the receiving module 630 may be an input interface; or the input and output may be the same interface, in which case both the transmitting module 620 and the receiving module 630 are that interface. The processing module 610 can be a processor of the chip system, and may include one or more central processing units. It should be understood that the processing module 610 in this embodiment can be implemented by a processor or processor-related circuit components, the transmitting module 620 can be implemented by a transmitter or transmitter-related circuit components, and the receiving module 630 can be implemented by a receiver or receiver-related circuit components.

[0255] The transmitting module 620 and the receiving module 630 can be a single functional module, which can be called a transceiver module. The transceiver module can perform both transmitting and receiving operations. Alternatively, the transmitting module 620 and the receiving module 630 can be two functional modules. The transceiver module can be regarded as a collective term for these two functional modules. The transmitting module 620 is used to perform transmitting operations, and the receiving module 630 is used to perform receiving operations.

[0256] In one application scenario, the communication device 600 is used in a terminal device. For example, the communication device 600 can be a terminal device, or it can be a chip or other combined device or component with the aforementioned terminal device functions. For instance, the processing module 610 can be used to execute... Figure 2 , Figure 4 or Figure 5In any of the embodiments shown, all operations performed by the terminal device except for transmission and reception operations are described. For example, processing mode 610 is used to perform CSI measurements. Furthermore, for the implementation of the transmission module 620 and the reception module 630, please refer to the description of the implementation of the transmission module 620 and the reception module 630.

[0257] In one example:

[0258] The receiving module 630 is configured to receive Channel State Information-Reference Signal (CSI-RS) resource configuration information from a network device. The CSI-RS resource configuration information includes a set of CSI-RS resources. The CSI-RS resource set includes at least a first CSI-RS resource. A first port group corresponding to the first CSI-RS resource is associated with a first transmission configuration indication state. A second port group corresponding to the first CSI-RS resource is associated with a second transmission configuration indication state. The first port group includes at least one port, and the second port group includes at least one port. The identifiers of the ports included in the first port group and the ports included in the second port group are different.

[0259] Processing module 610 is used to perform CSI measurement based on the CSI-RS resource configuration information;

[0260] The sending module 620 is used to report CSI to the network device.

[0261] As one possible implementation, the CSI-RS resource set further includes a second CSI-RS resource, wherein the port corresponding to the second CSI-RS resource is associated with a third transmission configuration indication state;

[0262] The CSI includes a first measurement result obtained by performing CSI measurements on CSI-RS resources in the CSI-RS resource set, and the first measurement result includes a first CSI parameter and a second CSI parameter.

[0263] The first CSI parameter includes a first channel state information-reference signal resource indication (CRI), the CSI-RS resource indicated by the first CRI is the first CSI-RS resource, and the other CSI parameters in the first CSI parameter besides the first CRI are determined on the first CSI-RS resource.

[0264] The second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the second CSI-RS resource, and the other CSI parameters in the second CSI parameter besides the second CRI are determined on the second CSI-RS resource.

[0265] In one possible implementation, the ports in the first port group belong to a first code division multiple access (CDM) group set, which contains one or more CDM groups; the first CDM group set is associated with the first transmission configuration indication state.

[0266] The ports in the second port group belong to the second code division multiple access (CDM) group set, which contains one or more CDM groups; the second CDM group set is associated with the second transmission configuration indication state.

[0267] The identifiers of the CDM groups in the first CDM group set are different from those in the second CDM group set.

[0268] As one possible implementation, the first CSI-RS resource includes J CDM groups, where J is an integer greater than 1;

[0269] The first CDM group set includes J1 CDM groups, wherein the J1 CDM groups are the first CDM group to the J1st CDM group among the J CDM groups;

[0270] The second CDM group set includes J1 CDM groups, which are the J-J1+1th to the Jth CDM groups among the J CDM groups, where J1 = floor(J / 2), and floor() represents the floor operation.

[0271] In one possible implementation, the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group are located in different time units.

[0272] As one possible implementation, the first transmission configuration indication state includes quasi-co-site type D, and / or the second transmission configuration indication state includes quasi-co-site type D;

[0273] The time-frequency resources corresponding to the ports in the first port group are located in different time units than the time-frequency resources corresponding to the ports in the second port group.

[0274] In one possible implementation, the time-frequency resources corresponding to the ports included in the first port group are not adjacent to the time-frequency resources corresponding to the ports included in the second port group in the time domain.

[0275] In one possible implementation, the number of time units in the time domain between the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group is greater than or equal to the capability parameters reported by the terminal device.

[0276] As one possible implementation, the receiving module 630 is further configured to receive mode indication information from the network device, the mode indication information being used to indicate that each of the N CSI-RS resources included in the CSI-RS resource set is associated with one of the M transmission modes, the N CSI-RS resources including the first CSI-RS resource and the second CSI-RS resource, where N is an integer greater than 1 and M is a positive integer less than or equal to N.

[0277] Another example:

[0278] The receiving module 630 is configured to receive first channel state information - reference signal (CSI-RS) resource configuration information from a network device. The first CSI-RS resource configuration information includes a set of CSI-RS resources, the set of CSI-RS resources includes at least a first group of CSI-RS resources, the first group of CSI-RS resources includes a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource is associated with a first transmission configuration indication state, and the second CSI-RS resource is associated with a second transmission configuration indication state; there is an association between the first CSI-RS resource and the second CSI-RS resource.

[0279] Processing module 610 is used to perform CSI measurement based on the first resource configuration information;

[0280] The sending module 620 is used to report CSI to network devices.

[0281] As one possible implementation, the CSI resource configuration information may further include a third CSI-RS resource, which is associated with a third transmission configuration indication status;

[0282] The CSI includes a first measurement result obtained by performing CSI measurements on CSI-RS resources in the CSI-RS resource set, and the first measurement result includes a first CSI parameter and a second CSI parameter.

[0283] Wherein, the first CSI parameter includes a first CRI, the CSI-RS resource indicated by the first CRI is the third CSI-RS resource, and the other parameters in the first CSI parameter besides the first CRI are determined on the third CSI-RS resource;

[0284] The second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group, and the other parameters in the second CSI parameter besides the second CRI are determined on the first CSI-RS resource group.

[0285] As one possible implementation, the first CSI-RS resource and the second CSI-RS resource occupy different time units.

[0286] As one possible implementation, the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D;

[0287] The first CSI-RS resource and the second CSI-RS resource occupy different time units.

[0288] As one possible implementation, the first CSI-RS resource and the second CSI-RS resource are not adjacent in the time domain.

[0289] As one possible implementation, the time interval between the first CSI-RS resource and the second CSI-RS resource is greater than or equal to the capability parameter reported by the terminal device.

[0290] As one possible implementation, the receiving module 630 is further configured to receive mode indication information from the network device, the mode indication information being used to indicate that each of the N CSI-RS resources included in the CSI-RS resource set is associated with one of the M transmission modes, the N CSI-RS resources including the first CSI-RS resource and the second CSI-RS resource, where N is an integer greater than 1 and M is a positive integer less than or equal to N.

[0291] As one possible implementation, the number of ports corresponding to the CSI-RS resources included in the first CSI-RS resource group is greater than 16.

[0292] In one possible implementation, the receiving module 630 is further configured to receive second CSI-RS resource configuration information from the network device. The second CSI-RS resource configuration information includes the CSI-RS resource set. The first port group corresponding to the first CSI-RS resource included in the CSI-RS resource set is associated with a first transmission configuration indication state. The second port group corresponding to the first CSI-RS resource is associated with a second transmission configuration indication state. The first port group includes at least one port, and the second port group includes at least one port. The identifiers of the ports included in the first port group are different from the identifiers of the ports included in the second port group. The receiving module 630 is further configured to receive a configuration indication from the network device before the processing module 610 performs CSI measurement based on the first resource configuration information. The configuration indication is used to indicate the use of a first resource configuration method. The resource configuration method of the first CSI-RS resource configuration information is the first resource configuration method, and the resource configuration method of the second CSI-RS resource configuration information is the second resource configuration method.

[0293] Another example:

[0294] The receiving module 630 is configured to receive a CSI reporting configuration group from a network device. The CSI reporting configuration group includes a first CSI reporting configuration and a second CSI reporting configuration. The first CSI reporting configuration and the second CSI reporting configuration are used to configure the method of reporting CSI to the terminal device. The first CSI reporting configuration is associated with a first CSI-RS resource set, and the second CSI reporting configuration is associated with a second CSI-RS resource set. The first CSI-RS resource set is associated with a first transmission configuration indication state, and the second CSI-RS resource set is associated with a second transmission configuration indication state. The first CSI reporting configuration and the second CSI reporting configuration have a binding relationship, which is used to indicate that CSI measurements are performed on the CSI-RS resource sets respectively associated with the two CSI reporting configurations with the binding relationship.

[0295] Processing module 610 is used to perform CSI measurements according to the CSI reporting configuration group;

[0296] The sending module 620 is used to report CSI to the network device.

[0297] As one possible implementation, the CSI includes measurement results obtained by performing CSI measurements on a first CSI-RS resource set associated with the first CSI reporting configuration, measurement results obtained by performing CSI measurements on a second CSI-RS resource set associated with the second CSI reporting configuration, and measurement results obtained by performing CSI measurements on both the first CSI-RS resource set and the second CSI-RS resource set.

[0298] As one possible implementation, the receiving module 630 is further configured to receive indication information from a network device, the indication information being used to indicate that the first CSI reporting configuration and the second CSI reporting configuration in the CSI reporting configuration group have a binding relationship.

[0299] As one possible implementation, the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0300] As one possible implementation, the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D; the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0301] As one possible implementation, the first CSI-RS resource set and the second CSI-RS resource set are not adjacent in the time domain.

[0302] As one possible implementation, the time interval between the first CSI-RS resource set and the second CSI-RS resource set is greater than or equal to the capability parameter reported by the terminal device.

[0303] In another application scenario, the communication device 600 is used in network equipment. For example, the communication device 600 can be a network device, or it can be a chip or other combined device or component with the aforementioned network device functions. For example, the processing module 610 can be used to execute... Figure 2 , Figure 4 or Figure 5 In any of the embodiments shown, all operations performed by the network device except for transmission and reception operations are included. For example, processing mode 610 is used to perform CSI measurements. Furthermore, for the implementation of the transmitting module 620 and the receiving module 630, please refer to the description of the implementation of the transmitting module 620 and the receiving module 630.

[0304] In one example:

[0305] The transmitting module 620 transmits Channel State Information - Reference Signal (CSI-RS) resource configuration information to the terminal device. The CSI-RS resource configuration information includes a set of CSI-RS resources. The CSI-RS resource set includes at least a first CSI-RS resource. The first port group corresponding to the first CSI-RS resource is associated with a first transmission configuration indication state. The second port group corresponding to the first CSI-RS resource is associated with a second transmission configuration indication state. The first port group includes at least one port, and the second port group includes at least one port. The identifiers of the ports included in the first port group and the ports included in the second port group are different.

[0306] The receiving module 630 receives the CSI reported by the terminal device. The CSI is obtained by the terminal device through CSI measurement based on the CSI-RS resource configuration information. The processing module 610 can perform further processing based on the CSI. The processing module 610 can also be used to generate CSI-RS resource configuration information.

[0307] As one possible implementation, the CSI-RS resource set further includes a second CSI-RS resource, the port corresponding to the second CSI-RS resource being associated with a third transmission configuration indication state; CSI includes a first measurement result obtained by performing CSI measurements on the CSI-RS resources in the CSI-RS resource set, the first measurement result including a first CSI parameter and a second CSI parameter; wherein, the first CSI parameter includes a first channel state information-reference signal resource indication (CRI), the CSI-RS resource indicated by the first CRI is the first CSI-RS resource, and the other CSI parameters in the first CSI parameter besides the first CRI are determined on the first CSI-RS resource; wherein, the second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the second CSI-RS resource, and the other CSI parameters in the second CSI parameter besides the second CRI are determined on the second CSI-RS resource.

[0308] In one possible implementation, the ports in the first port group belong to a first code division multiple access (CDM) group set, which contains one or more CDM groups; the first CDM group set is associated with a first transmission configuration indication state; the ports in the second port group belong to a second code division multiple access (CDM) group set, which contains one or more CDM groups; the second CDM group set is associated with a second transmission configuration indication state; the identifiers of the CDM groups in the first CDM group set and the CDM groups in the second CDM group set are different.

[0309] As one possible implementation, the first CSI-RS resource includes J CDM groups, where J is an integer greater than 1; the first CDM group set includes J1 CDM groups, where J1 CDM groups are the 1st to the J1st CDM groups among the J CDM groups; the second CDM group set includes J1 CDM groups, where J1 CDM groups are the J-J1+1th to the Jth CDM groups among the J CDM groups, where J1 = floor(J / 2), and floor() represents the floor operation.

[0310] In one possible implementation, the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group are located in different time units.

[0311] As one possible implementation, the first transmission configuration indication state includes quasi-co-location type D, and / or the second transmission configuration indication state includes quasi-co-location type D; the time-frequency resources corresponding to the ports included in the first port group and the time-frequency resources corresponding to the ports included in the second port group are located in different time units.

[0312] In one possible implementation, the time-frequency resources corresponding to the ports in the first port group are not adjacent to the time-frequency resources corresponding to the ports in the second port group in the time domain.

[0313] In one possible implementation, the number of time units in the time domain between the time-frequency resources corresponding to the ports in the first port group and the time-frequency resources corresponding to the ports in the second port group is greater than or equal to the capability parameters reported by the terminal device.

[0314] In one possible implementation, the sending module 620 is further configured to send mode indication information to the terminal device. The mode indication information is used to indicate that each of the N CSI-RS resources included in the CSI-RS resource set is associated with one of the M sending modes. The N CSI-RS resources include a first CSI-RS resource and a second CSI-RS resource. N is an integer greater than 1, and M is a positive integer less than or equal to N.

[0315] Another example:

[0316] The transmitting module 620 is used to transmit first channel state information - reference signal CSI-RS resource configuration information to the terminal device. The first CSI-RS resource configuration information includes a set of CSI-RS resources, the set of CSI-RS resources includes at least a first group of CSI-RS resources, the first group of CSI-RS resources includes first CSI-RS resources and second CSI-RS resources, the first CSI-RS resources are associated with a first transmission configuration indication state, the second CSI-RS resources are associated with a second transmission configuration indication state, and there is an association between the first CSI-RS resources and the second CSI-RS resources.

[0317] The receiving module 630 is used to receive the CSI reported by the terminal device. The CSI is obtained by the terminal device through CSI measurement based on the first CSI-RS resource configuration information. The processing module 610 can perform further processing based on the CSI. The processing module 610 can also be used to generate the first CSI-RS resource configuration information.

[0318] In one possible implementation, the first CSI resource configuration information further includes a third CSI-RS resource, which is associated with a third transmission configuration indication state; the CSI includes a first measurement result obtained by performing CSI measurements on CSI-RS resources in the CSI-RS resource set, the first measurement result including a first CSI parameter and a second CSI parameter; wherein, the first CSI parameter includes a first CRI, the CSI-RS resource indicated by the first CRI is the third CSI-RS resource, and the other parameters in the first CSI parameter besides the first CRI are determined on the third CSI-RS resource; wherein, the second CSI parameter includes a second CRI, the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group, and the other parameters in the second CSI parameter besides the second CRI are determined on the first CSI-RS resource group.

[0319] As one possible implementation, the first CSI-RS resource and the second CSI-RS resource occupy different time units.

[0320] As one possible implementation, the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D; the time units occupied by the first CSI-RS resource and the second CSI-RS resource are different.

[0321] As one possible implementation, the first CSI-RS resource and the second CSI-RS resource are not adjacent in the time domain.

[0322] As one possible implementation, the time interval between the first CSI-RS resource and the second CSI-RS resource is greater than or equal to the capability parameter reported by the terminal device.

[0323] In one possible implementation, the sending module 620 is further configured to send mode indication information to the terminal device. The mode indication information is used to indicate that each of the N CSI-RS resources included in the CSI-RS resource set is associated with one of the M sending modes. The N CSI-RS resources include a first CSI-RS resource and a second CSI-RS resource. N is an integer greater than 1, and M is a positive integer less than or equal to N.

[0324] As one possible implementation, the number of ports corresponding to the CSI-RS resources included in the first CSI-RS resource group is greater than 16.

[0325] In one possible implementation, the receiving module 630 is further configured to receive second CSI-RS resource configuration information from the network device. The second CSI-RS resource configuration information includes a set of CSI-RS resources. The first port group corresponding to the first CSI-RS resource in the CSI-RS resource set is associated with a first transmission configuration indication state. The second port group corresponding to the first CSI-RS resource is associated with a second transmission configuration indication state. The first port group includes at least one port, and the second port group includes at least one port. The identifiers of the ports included in the first port group are different from the identifiers of the ports included in the second port group. Before performing CSI measurement based on the first resource configuration information, the module further includes receiving a configuration indication from the network device. The configuration indication is used to indicate the use of a first resource configuration method. The resource configuration method of the first CSI-RS resource configuration information is the first resource configuration method, and the resource configuration method of the second CSI-RS resource configuration information is the second resource configuration method.

[0326] Another example:

[0327] The sending module 620 is used to send a CSI reporting configuration group to the terminal device. The CSI reporting configuration group includes a first CSI reporting configuration and a second CSI reporting configuration. The first CSI reporting configuration and the second CSI reporting configuration are used to configure the method of reporting CSI to the terminal device. The first CSI reporting configuration is associated with a first CSI-RS resource set, and the second CSI reporting configuration is associated with a second CSI-RS resource set. The first CSI-RS resource set is associated with a first transmission configuration indication state, and the second CSI-RS resource set is associated with a second transmission configuration indication state. The first CSI reporting configuration and the second CSI reporting configuration have a binding relationship. The binding relationship is used to indicate that CSI measurement is performed on the CSI-RS resource sets associated with the two CSI reporting configurations that have a binding relationship.

[0328] The receiving module 630 is used to receive the CSI reported by the terminal device. The CSI is obtained by the terminal device through CSI measurement based on the CSI reporting configuration group.

[0329] As one possible implementation, CSI includes measurement results obtained by performing CSI measurements on a first CSI-RS resource set associated with the first CSI reporting configuration, measurement results obtained by performing CSI measurements on a second CSI-RS resource set associated with the second CSI reporting configuration, and measurement results obtained by performing CSI measurements on the first CSI-RS resource set and the second CSI-RS resource set.

[0330] In one possible implementation, the sending module 620 is also used to send indication information to the terminal device, the indication information being used to indicate that the first CSI reporting configuration and the second CSI reporting configuration in the CSI reporting configuration group have a binding relationship.

[0331] As one possible implementation, the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0332] As one possible implementation, the first transmission configuration indication state includes quasi-co-site type D or the second transmission configuration indication state includes quasi-co-site type D; the time units occupied by the first CSI-RS resource set and the second CSI-RS resource set are different.

[0333] As one possible implementation, the first CSI-RS resource set and the second CSI-RS resource set are not adjacent in the time domain.

[0334] As one possible implementation, the time interval between the first CSI-RS resource set and the second CSI-RS resource set is greater than or equal to the capability parameter reported by the terminal device.

[0335] It should be understood that the division of units in the above device is merely a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, all units in the device can be implemented entirely through software calls from processing elements; all units can be implemented entirely in hardware; or some units can be implemented through software calls from processing elements, and some units can be implemented in hardware. For example, each unit can be a separately established processing element, or it can be integrated into a chip within the device. Alternatively, it can be stored as a program in memory, called and executed by a processing element of the device. Moreover, these units can be fully or partially integrated together, or implemented independently. The processing element mentioned here can also be called a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units can be implemented through integrated logic circuits in the processor element or through software calls from processing elements.

[0336] In one example, the units in any of the above devices can be one or more integrated circuits configured to implement the methods described above, such as: one or more application-specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), or a combination of at least two of these forms of integrated circuits. As another example, when the units in the device can be implemented in the form of a processing element scheduler, the processing element can be a general-purpose processor, such as a CPU or other processor capable of calling programs. Furthermore, these units can be integrated together to implement a system-on-a-chip (SOC).

[0337] The receiving unit (e.g., a receiving module) described above is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the receiving unit is an interface circuit for the chip to receive signals from other chips or devices. The transmitting unit (e.g., a transmitting module) described above is an interface circuit of the device for transmitting signals to other devices. For example, when the device is implemented as a chip, the transmitting unit is an interface circuit for the chip to transmit signals to other chips or devices.

[0338] like Figure 7As shown, the communication device 700 includes a processor 710 and an interface circuit 720. The processor 710 and the interface circuit 720 are coupled to each other. It is understood that the interface circuit 720 can be a transceiver or an input / output interface. Optionally, the communication device 700 may also include a memory 730 for storing instructions executed by the processor 710, or storing input data required by the processor 710 to execute instructions, or storing data generated after the processor 710 executes instructions.

[0339] When the communication device 700 is used to implement the method in the above method embodiment, the processor 710 is used to execute the function of the processing module 610, and the interface circuit 720 is used to execute the functions of the sending module 620 and the receiving module 630.

[0340] When the aforementioned communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments. The terminal device chip receives information from other modules (such as radio frequency modules or antennas) in the terminal device; this information is sent to the terminal device by the mobility management network element. Alternatively, the terminal device chip sends information to other modules (such as radio frequency modules or antennas) in the terminal device; this information is sent by the terminal device to the network device.

[0341] When the aforementioned communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments. The network device chip receives information from other modules (such as radio frequency modules or antennas) in the mobility management network element; this information is sent from the terminal device to the network device. Alternatively, the network device chip sends information to other modules (such as radio frequency modules or antennas) in the network device; this information is sent from the network device to the terminal device.

[0342] like Figure 8 As shown, this application also provides a structural schematic diagram of a terminal device, which can be used to implement the functions of the terminal device in the above method embodiments. For ease of explanation, Figure 8 Only the main components of the terminal device are shown. For example... Figure 8 As shown, the terminal device 800 may include a processor 802, a memory, and a transceiver control unit 801. Optionally, it may also include an antenna and / or input / output devices. The processor can be used to process communication protocols and communication data, control user equipment, and execute software programs. The memory can store software programs and / or data. The transceiver control unit can be used for the conversion between baseband signals and radio frequency signals, and for processing radio frequency signals. The transceiver control unit 801, together with the antenna, can also be called a transceiver, which can be used to transmit and receive radio frequency signals. Input / output devices, such as touch screens, displays, and keyboards, can be used to receive user input data and output data to the user.

[0343] It is understood that the processor in the embodiments of this application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. A general-purpose processor may be a microprocessor or any conventional processor.

[0344] The method steps in the embodiments of this application can be implemented in hardware or by a processor executing software instructions. The software instructions can consist of corresponding software modules, which can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, portable hard disks, CD-ROMs, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can reside in an ASIC. Furthermore, the ASIC can reside in an access network device or a terminal device. Alternatively, the processor and storage medium can exist as discrete components in the access network device or terminal device.

[0345] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0346] The various illustrative logic units and circuits described in the embodiments of this application can be implemented or operate the described functions using a general-purpose processor, digital signal processor, application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. The general-purpose processor can be a microprocessor; alternatively, it can also be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented using a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration.

[0347] The steps of the methods or algorithms described in the embodiments of this application can be directly embedded in hardware, software units executed by a processor, or a combination of both. The software units can be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium in the art. Exemplarily, the storage medium can be connected to the processor so that the processor can read information from and write information to the storage medium. Optionally, the storage medium can also be integrated into the processor. The processor and storage medium can be housed in an ASIC.

[0348] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0349] In one or more exemplary designs, the functions described in the embodiments of this application can be implemented in hardware, software, firmware, or any combination of these three. If implemented in software, these functions can be stored on a computer-readable medium or transmitted on a computer-readable medium in the form of one or more instructions or code. Computer-readable media includes computer storage media and communication media that facilitate the transfer of computer programs from one place to another. Storage media can be any available media that can be accessed by a general-purpose or special-purpose computer. For example, such computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store program code in the form of instructions or data structures and other forms that can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Furthermore, any connection can be suitably defined as a computer-readable medium, for example, if the software is transmitted from a website, server or other remote resource via a coaxial cable, fiber optic computer, twisted pair, digital subscriber line (DSL) or wirelessly, such as infrared, wireless and microwave, it is also included in the defined computer-readable medium. The disks and discs mentioned include compressed disks, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs. Disks typically copy data magnetically, while discs typically copy data optically using lasers. Combinations of the above can also be contained in computer-readable media.

[0350] Those skilled in the art will recognize that the functions described in the embodiments of this application in one or more of the above examples can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0351] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above descriptions are merely specific implementations of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Any modifications, equivalent substitutions, or improvements made based on the technical solutions of the embodiments of this application should be included within the scope of protection of the embodiments of this application. The above description of this application specification allows any artist in the art to utilize or implement the content of the embodiments of this application. Any modifications based on the disclosed content should be considered obvious in the art. The basic principles described in the embodiments of this application can be applied to other variations without departing from the inventive nature and scope of this application. Therefore, the content disclosed in the embodiments of this application is not limited to the described embodiments and designs, but can be extended to the maximum scope consistent with the principles of this application and the disclosed new features.

[0352] Although this application has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made thereto without departing from the spirit and scope of the embodiments of this application. Accordingly, this specification and drawings are merely exemplary illustrations of the application as defined by the appended claims, and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of this application. Obviously, those skilled in the art can make various alterations and modifications to this application without departing from the scope of this application. Thus, if these modifications and modifications to the embodiments of this application fall within the scope of the claims of this application and their equivalents, the embodiments of this application are also intended to include these modifications and modifications.

Claims

1. A resource allocation method, characterized in that, include: Obtain first channel state information - reference signal CSI-RS resource configuration information, the first CSI-RS resource configuration information includes a set of CSI-RS resources; The CSI-RS resource set includes at least a first CSI-RS resource group, the first CSI-RS resource group includes a first CSI-RS resource and a second CSI-RS resource, the first CSI-RS resource is associated with a first transmission configuration indication state, and the second CSI-RS resource is associated with a second transmission configuration indication state; there is an association between the first CSI-RS resource and the second CSI-RS resource; or, The CSI-RS resource set includes at least a first CSI-RS resource group and a second CSI-RS resource group. The first CSI-RS resource group includes first CSI-RS resources, and the second CSI-RS resource group includes second CSI-RS resources. The first CSI-RS resources are associated with a first transmission configuration indication state, and the second CSI-RS resources are associated with a second transmission configuration indication state. There is also an association between the first CSI-RS resources and the second CSI-RS resources. A first measurement result is obtained, and the first measurement result is related to the first CSI-RS resource configuration information.

2. The method according to claim 1, characterized in that, The first CSI-RS resource configuration information also includes a third CSI-RS resource, which is associated with a third transmission configuration indication status.

3. The method according to claim 2, characterized in that, The CSI-RS resource set includes the third CSI-RS resource.

4. The method according to claim 2, characterized in that, The first measurement result includes a first CSI parameter and a second CSI parameter; wherein, The first CSI parameter includes a first CRI, and the CSI-RS resource indicated by the first CRI is the third CSI-RS resource; The second CSI parameter includes a second CRI, and the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group.

5. A resource allocation method, characterized in that, include: Generate first channel state information - reference signal CSI-RS resource configuration information, the first CSI-RS resource configuration information includes a set of CSI-RS resources; The CSI-RS resource set includes at least a first CSI-RS resource group, which includes a first CSI-RS resource and a second CSI-RS resource. The first CSI-RS resource is associated with a first transmission configuration indication state, and the second CSI-RS resource is associated with a second transmission configuration indication state; there is an association between the first CSI-RS resource and the second CSI-RS resource; or, The CSI-RS resource set includes at least a first CSI-RS resource group and a second CSI-RS resource group. The first CSI-RS resource group includes first CSI-RS resources, and the second CSI-RS resource group includes second CSI-RS resources. The first CSI-RS resources are associated with a first transmission configuration indication state, and the second CSI-RS resources are associated with a second transmission configuration indication state. There is also an association between the first CSI-RS resources and the second CSI-RS resources. Send the first CSI-RS resource configuration information; The first CSI-RS resource configuration information is correlated with the first measurement result obtained by the terminal device.

6. The method according to claim 5, characterized in that, The first CSI-RS resource configuration information also includes a third CSI-RS resource, which is associated with a third transmission configuration indication status.

7. The method according to claim 6, characterized in that, The CSI-RS resource set includes the third CSI-RS resource.

8. The method according to claim 6, characterized in that, The first measurement result includes a first CSI parameter and a second CSI parameter; wherein, The first CSI parameter includes a first CRI, and the CSI-RS resource indicated by the first CRI is the third CSI-RS resource; The second CSI parameter includes a second CRI, and the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group.

9. A resource allocation device, characterized in that, include: The communication module is used to acquire first channel state information - reference signal CSI-RS resource configuration information, the first CSI-RS resource configuration information including a set of CSI-RS resources; The CSI-RS resource set includes at least a first CSI-RS resource group, which includes a first CSI-RS resource and a second CSI-RS resource. The first CSI-RS resource is associated with a first transmission configuration indication state, and the second CSI-RS resource is associated with a second transmission configuration indication state; there is an association between the first CSI-RS resource and the second CSI-RS resource; or, The CSI-RS resource set includes at least a first CSI-RS resource group and a second CSI-RS resource group. The first CSI-RS resource group includes first CSI-RS resources, and the second CSI-RS resource group includes second CSI-RS resources. The first CSI-RS resources are associated with a first transmission configuration indication state, and the second CSI-RS resources are associated with a second transmission configuration indication state. There is also an association between the first CSI-RS resources and the second CSI-RS resources. The processing module is used to obtain a first measurement result, which is related to the first CSI-RS resource configuration information.

10. The apparatus according to claim 9, characterized in that, The first CSI-RS resource configuration information also includes a third CSI-RS resource, which is associated with a third transmission configuration indication status.

11. The apparatus according to claim 10, characterized in that, The CSI-RS resource set includes the third CSI-RS resource.

12. The apparatus according to claim 10, characterized in that, The first measurement result includes a first CSI parameter and a second CSI parameter; wherein, The first CSI parameter includes a first CRI, and the CSI-RS resource indicated by the first CRI is the third CSI-RS resource; The second CSI parameter includes a second CRI, and the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group.

13. The apparatus according to any one of claims 9-12, characterized in that, The communication module is a transceiver, and the processing module is a processor.

14. A resource allocation device, characterized in that, include: The processing module is used to generate first channel state information - reference signal CSI-RS resource configuration information, the first CSI-RS resource configuration information including a set of CSI-RS resources; The CSI-RS resource set includes at least a first CSI-RS resource group, which includes a first CSI-RS resource and a second CSI-RS resource. The first CSI-RS resource is associated with a first transmission configuration indication state, and the second CSI-RS resource is associated with a second transmission configuration indication state; there is an association between the first CSI-RS resource and the second CSI-RS resource; or, The CSI-RS resource set includes at least a first CSI-RS resource group and a second CSI-RS resource group. The first CSI-RS resource group includes first CSI-RS resources, and the second CSI-RS resource group includes second CSI-RS resources. The first CSI-RS resources are associated with a first transmission configuration indication state, and the second CSI-RS resources are associated with a second transmission configuration indication state. There is also an association between the first CSI-RS resources and the second CSI-RS resources. The communication module is used to send the first CSI-RS resource configuration information; The first CSI-RS resource configuration information is correlated with the first measurement result obtained by the terminal device.

15. The apparatus according to claim 14, characterized in that, The first CSI-RS resource configuration information also includes a third CSI-RS resource, which is associated with a third transmission configuration indication status.

16. The apparatus according to claim 15, characterized in that, The CSI-RS resource set includes the third CSI-RS resource.

17. The apparatus according to claim 15, characterized in that, The first measurement result includes a first CSI parameter and a second CSI parameter; wherein, The first CSI parameter includes a first CRI, and the CSI-RS resource indicated by the first CRI is the third CSI-RS resource; The second CSI parameter includes a second CRI, and the CSI-RS resource indicated by the second CRI is the first CSI-RS resource group.

18. The apparatus according to any one of claims 14-17, characterized in that, The communication module is a transceiver, and the processing module is a processor.

19. A computer-readable storage medium, characterized in that, The computer storage medium stores computer instructions that, when executed, cause the method described in any one of claims 1-4 to be performed, or cause the method described in any one of claims 5-8 to be performed.

20. A communication device, characterized in that, The communication device includes a processor and a communication interface, the communication interface being used for inputting and / or outputting signals; the processor executes computer program code or instructions to perform the method as described in any one of claims 1-4, or the processor executes the computer program code or instructions to perform the method as described in any one of claims 5-8.

21. A computer program product comprising computer instructions, characterized in that, When the computer instructions are executed, the method of any one of claims 1-4 is performed, or the method of any one of claims 5-8 is performed.

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