CSI reporting and receiving method, device, terminal equipment, and network equipment

Abstract

An embodiment of the present application provides a CSI reporting and receiving method, apparatus, terminal device, and network device, the method comprising: the terminal device determines second information in a second CSI part based on first information in a first CSI part; wherein the first information is assumption information or two RIs, the assumption information is used to indicate a transmission assumption or a measurement assumption based on which the CSI reporting is based, the two RIs are measured based on different measurement resources, and the second information includes PMI and / or CQI; the terminal device reports CSI, and the CSI includes the first CSI part and the second CSI part.

Description

[0001] This application is a divisional application of the PCT international patent application PCT / CN2020 / 113101 with an application date of September 2, 2020, which entered the Chinese national phase with Chinese patent application number 202080103620.1 and the invention name being "CSI reporting and receiving method, device, terminal equipment, and network equipment." Technical Field

[0002] The embodiments of the present application relate to the field of mobile communication technology, and specifically to a method, apparatus, terminal equipment, and network equipment for reporting and receiving channel state information (CSI). Background Art

[0003] In order for the network device to perform reasonable scheduling, the terminal device needs to report CSI so that the network device can determine the scheduling information of the terminal device. The terminal device reports CSI based on the CSI reporting configuration configured by the network device. The terminal device reports one CSI for each CSI reporting configuration. One CSI can only be used to obtain channel information of a transmission / reception point (TRP) under one transmission scheme.

[0004] In order to support multiple transmission schemes, network equipment needs to configure multiple CSI reporting configurations for terminal devices, so that terminal devices report multiple CSIs based on different transmission schemes. However, this reporting method requires a lot of CSI reporting overhead, which affects the uplink transmission performance; in addition, it will also introduce a large CSI feedback delay, which affects the downlink transmission performance. Summary of the invention

[0005] The embodiments of the present application provide a CSI reporting and receiving method, apparatus, terminal equipment, and network equipment.

[0006] The CSI reporting method provided in the embodiment of the present application includes:

[0007] The terminal device determines the second information in the second CSI part according to the first information in the first CSI part; wherein the first information is assumption information or two rank indication information (Rank Indicator, RI), the assumption information is used to indicate the transmission assumption or measurement assumption based on the CSI reporting, the two RIs are measured based on different measurement resources, and the second information includes precoding matrix indication information (Precoding Matrix Indicator, PMI) and / or channel quality indication information (Channel Quality Indicator, CQI);

[0008] The terminal device reports CSI, and the CSI includes the first CSI part and the second CSI part.

[0009] The CSI receiving method provided in an embodiment of the present application includes:

[0010] A network device receives CSI reported by a terminal device, wherein the CSI includes a first CSI part and a second CSI part, and second information in the second CSI part is determined based on the first information in the first CSI part; wherein the first information is assumption information or two RIs, and the assumption information is used to indicate a transmission assumption or a measurement assumption based on which the CSI reporting is based, and the two RIs are measured based on different measurement resources, and the second information includes PMI and / or CQI.

[0011] The CSI reporting device provided in the embodiment of the present application is applied to a terminal device, and the device includes:

[0012] a determining unit, configured to determine second information in a second CSI part according to first information in a first CSI part; wherein the first information is assumption information or two RIs, the assumption information is used to indicate a transmission assumption or a measurement assumption based on which the CSI reporting is based, the two RIs are measured based on different measurement resources, and the second information includes a PMI and / or a CQI;

[0013] A sending unit is used to report CSI, where the CSI includes the first CSI part and the second CSI part.

[0014] The CSI receiving device provided in the embodiment of the present application is applied to a network device, and the device includes:

[0015] A receiving unit receives CSI reported by a terminal device, wherein the CSI includes a first CSI part and a second CSI part, and second information in the second CSI part is determined based on the first information in the first CSI part; wherein the first information is assumption information or two RIs, and the assumption information is used to indicate a transmission assumption or a measurement assumption based on which the CSI report is based, and the two RIs are measured based on different measurement resources, and the second information includes PMI and / or CQI.

[0016] The terminal device provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-mentioned CSI reporting method.

[0017] The network device provided in the embodiment of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-mentioned CSI receiving method.

[0018] The chip provided in the embodiment of the present application is used to implement the above-mentioned CSI reporting method or CSI receiving method.

[0019] Specifically, the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the chip executes the above-mentioned CSI reporting method or CSI receiving method.

[0020] The computer-readable storage medium provided in an embodiment of the present application is used to store a computer program, which enables a computer to execute the above-mentioned CSI reporting method or CSI receiving method.

[0021] The computer program product provided in the embodiments of the present application includes computer program instructions, which enable a computer to execute the above-mentioned CSI reporting method or CSI receiving method.

[0022] The computer program provided in the embodiment of the present application, when executed on a computer, enables the computer to execute the above-mentioned CSI reporting method or CSI receiving method.

[0023] Through the above technical solution, different transmission schemes are indicated by the assumed information or two RIs in the first CSI part, and the terminal device reports the PMI and / or CQI corresponding to the indicated transmission scheme in the second CSI part. Since the overhead of the second CSI part is flexibly determined according to the transmission scheme indicated by the first CSI part, and the terminal device only needs to report the CSI corresponding to the best transmission scheme, flexible switching between different transmission schemes can be supported with very low CSI feedback overhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

[0026] Figure 2-1 This is a schematic diagram of the downlink non-coherent transmission provided by the embodiment of the present application. Figure 1 ;

[0027] Figure 2-2 Schematic diagram 2 of downlink incoherent transmission provided in an embodiment of the present application;

[0028] Figure 2-3 This is a schematic diagram of the downlink non-coherent transmission provided by the embodiment of the present application. Figure 3 ;

[0029] Figure 3 It is a schematic diagram of CSI reporting methods with different periodicities provided in an embodiment of the present application;

[0030] Figure 4 It is a flowchart of a CSI reporting and receiving method provided in an embodiment of the present application;

[0031] Figure 5 is a flowchart of a CSI reporting method of application example 1;

[0032] Figure 6-1 This is a schematic diagram of the composition of the CSI provided in the embodiment of the present application. Figure 1 ;

[0033] Figure 6-2 This is a second schematic diagram of the composition of the CSI provided in an embodiment of the present application;

[0034] Figure 6-3 This is a schematic diagram of the composition of the CSI provided in the embodiment of the present application. Figure 3 ;

[0035] Figure 7 is a flowchart of a CSI reporting method of application example 2;

[0036] Figure 8-1 This is a schematic diagram of the composition of the CSI provided in the embodiment of the present application. Figure 4 ;

[0037] Figure 8-2 This is a schematic diagram of the composition of the CSI provided in the embodiment of the present application. Figure 5 ;

[0038] Figure 8-3 6 is a schematic diagram of the composition of the CSI provided in an embodiment of the present application;

[0039] Fig. 9 It is a schematic diagram of the structure of the CSI reporting device provided in an embodiment of the present application;

[0040] Fig.10 It is a schematic diagram of the structure of a CSI receiving device provided in an embodiment of the present application;

[0041] Fig.11 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0042] Fig.12 is a schematic structural diagram of a chip according to an embodiment of the present application;

[0043] Fig.13 It is a schematic block diagram of a communication system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] The following will describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, 5G communication system or future communication system, etc.

[0046] For example, the communication system 100 used in the embodiment of the present application is as follows: Figure 1 As shown. The communication system 100 may include a network device 110, which may be a device that communicates with a terminal 120 (or referred to as a communication terminal, terminal). The network device 110 may provide communication coverage for a specific geographical area, and may communicate with terminals located within the coverage area. Optionally, the network device 110 may be an evolved base station (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future communication system, etc.

[0047] The communication system 100 also includes at least one terminal 120 located within the coverage of the network device 110. As used herein, "terminal" includes but is not limited to connecting via a wired line, such as via a Public Switched Telephone Networks (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as, for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or another terminal configured to receive / send communication signals; and / or an Internet of Things (IoT) device. A terminal configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; PDAs that may include radiotelephones, pagers, Internet / Intranet access, Web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. A terminal may refer to an access terminal, User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal in a 5G network, or a terminal in a future evolved PLMN, etc.

[0048] Optionally, the terminals 120 may perform device-to-device (D2D) communication.

[0049] Optionally, the 5G communication system or 5G network may also be referred to as a New Radio (NR) system or NR network.

[0050] Figure 1 One network device and two terminals are shown exemplarily. Optionally, the communication system 100 may include multiple network devices and each network device may include another number of terminals within its coverage area, which is not limited in the embodiments of the present application.

[0051] Optionally, the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

[0052] It should be understood that the device with communication function in the network / system in the embodiment of the present application can be referred to as a communication device. Figure 1 Taking the communication system 100 shown as an example, the communication equipment may include a network device 110 and a terminal 120 with communication functions. The network device 110 and the terminal 120 may be the specific devices described above and will not be repeated here. The communication equipment may also include other devices in the communication system 100, such as a network controller, a mobile management entity and other network entities, which is not limited in the embodiments of the present application.

[0053] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions related to the embodiments of the present application are described below.

[0055] Downlink non-coherent transmission

[0056] The NR system introduces non-coherent transmission based on multiple TRPs for downlink and uplink. The backhaul connection between TRPs can be ideal or non-ideal. In an ideal backhaul, TRPs can exchange information quickly and dynamically. In a non-ideal backhaul, TRPs can only exchange information quasi-statically due to the large delay. In downlink non-coherent transmission, multiple TRPs can use different physical downlink control channels (PDCCH) to independently schedule multiple physical downlink shared channels (PDSCH) of a terminal device. Multiple TRPs can also use the same PDCCH to schedule multiple PDSCH transmissions of a terminal device (only for ideal backhaul), where data from different TRPs use different transmission layers.

[0057] For downlink transmissions scheduled by multiple PDCCHs, the scheduled PDSCHs can be transmitted in the same time slot or in different time slots. The terminal device needs to support the simultaneous reception of PDCCHs and PDSCHs from different TRPs. When the terminal device feeds back Acknowledgement (ACK) / Negative Acknowledgement (NACK) and CSI, it can feed back ACK / NACK and CSI to different TRPs (such as Figure 2-1 As shown), or they can be combined and reported to a TRP (as shown Figure 2-2 As shown). The former can be applied to both ideal backhaul and non-ideal backhaul scenarios, while the latter can only be used in ideal backhaul scenarios. Among them, the downlink control information (Downlink Control Information, DCI) for scheduling PDSCH transmitted by different TRPs can be carried by different control resource sets (Control Resource Set, CORESET), that is, the network device is configured with multiple CORESETs, and each TRP uses its own CORESET for scheduling, that is, different TRPs can be distinguished by CORESET. For example, the network device can configure an index for each CORESET, and different indexes correspond to different TRPs. When the terminal device feeds back CSI, it is necessary to feed back the CSI corresponding to each TRP separately. The CSI contains RI, PMI, CQI and other contents, which can be used for scheduling downlink transmission of each TRP.

[0058] For multi-TRP downlink transmissions using a single PDCCH schedule, the same DCI can schedule multiple transport layers from different TRPs. Figure 2-3 . Among them, the transport layers from different TRPs use demodulation reference signal (DMRS) ports in different CDM groups and different transmission configuration indicator (TCI) states. The network equipment needs to indicate the DMRS ports from different CDM groups and the TCI states corresponding to different CDM groups in one DCI, so as to support different DMRS ports to use different beams for transmission. In this case, HARQ-ACK feedback and CSI reporting can reuse the mechanisms in the existing protocol. This solution can only be used in ideal backhaul scenarios.

[0059] Downlink CSI reporting

[0060] In order for the network equipment to perform reasonable scheduling, the terminal equipment needs to feedback the downlink CSI so that the network equipment can determine the scheduling information of the terminal equipment, such as the number of transmission layers, precoding matrix, transmission beam, modulation and coding method. Specifically, the CSI report of the terminal equipment is based on the CSI reporting configuration indicated by the network equipment. The uplink resources used by the terminal equipment to report CSI and the downlink reference signal used for CSI measurement are indicated by the CSI reporting configuration. Each CSI reporting configuration corresponds to a CSI report, and each CSI report can include CSI-RS resource indication information (CSI-RS Resource Indicator, CRI), RI, PMI, CQI and other information. Among them,

[0061] ■CRI is used to determine the CSI-RS resource currently used for channel measurement and the Interference Measurement Resource (IMR) currently used for interference measurement from multiple CSI-RS resources; here, the CSI-RS resource used for channel measurement may also be referred to as the Channel Measurement Resource (CMR);

[0062] ■RI is used to report the recommended number of transmission layers;

[0063] ■PMI is used to determine the recommended precoding matrix from a predefined codebook;

[0064] ■CQI is used to report the current channel quality and can be determined based on the Signal to Interference plus Noise Ratio (SINR) estimated by the terminal device. The channel part of SINR is determined based on the non-zero power Channel State Information Reference Signal (CSI-RS) resource configured by the network device for channel measurement, and the interference part is determined based on the Channel State Information Interference Measurement (CSI-IM) resource or non-zero power CSI-RS resource configured by the network device for interference measurement. CQI is calculated based on the reported RI and PMI.

[0065] The CSI reporting of the terminal device can be reported in three ways: periodic CSI, quasi-persistent CSI and aperiodic CSI. Figure 3 As shown. Among them, periodic CSI is transmitted on the Physical Uplink Control Channel (PUCCH), and its CSI reporting configuration is configured by the Radio Resource Control (RRC) signaling. After the terminal device receives the corresponding RRC signaling configuration, it periodically reports CSI. Quasi-persistent CSI can be transmitted on PUCCH or Physical Uplink Shared Channel (PUSCH). The CSI reporting configuration corresponding to the CSI transmitted on PUCCH is pre-configured by RRC signaling and activated or deactivated by Media Access Control (MAC) layer signaling. The CSI reporting configuration corresponding to the CSI transmitted on PUSCH is dynamically indicated (activated or deactivated) by DCI signaling. After the terminal device receives the activation signaling configured by the network device, it periodically transmits CSI on PUCCH or PUSCH until it stops reporting after receiving the deactivation signaling. The CSI reporting configuration corresponding to the non-periodic CSI reporting is also pre-configured through RRC signaling. Some of the configurations can be activated through MAC layer signaling, and then the CSI reporting configuration for CSI reporting is indicated through CSI trigger signaling in DCI. After receiving the CSI trigger signaling, the terminal device reports the corresponding CSI on the scheduled PUSCH at one time according to the indicated CSI reporting configuration.

[0066] When a CSI carries a large number of bits, in order to give priority to the transmission of important CSI information, a CSI can be divided into two parts (part). For different types of codebooks, the CSI information contained in CSI Part 1 (CSI Part 1) and CSI Part 2 (CSI Part 2) is shown in Table 1 below. The number of bits in CSI Part 1 is fixed and is used to carry a small amount of important information such as RI and CQI; the number of bits in CSI Part 2 is determined according to CSI Part 1 and is used to carry information with a large number of bits such as PMI. When the code rate of the uplink channel carrying CSI (such as PUSCH or PUCCH) exceeds a certain value, the terminal device needs to discard some information in CSI Part 2 to ensure the transmission performance of the uplink channel (at least the code rate is within a reasonable range). Specifically, the information in CSI Part 1 will not be discarded, and the CSI Part 2 corresponding to the CSI with a lower priority will be discarded first in CSI Part 2 according to the priority of CSI reporting. Among them, the priority of CSI reporting is determined according to the periodicity of CSI, the content of CSI reporting, the carrier corresponding to CSI reporting, and the ID of CSI reporting configuration.

[0067]

[0068] Table 1

[0069] The terminal device reports a CSI for each CSI reporting configuration, and the CSI is calculated based on the CMR and IMR configured by the network device. One CSI can only be used to obtain the channel information of one TRP under one transmission scheme. In order to support both single TRP transmission and multi-TRP downlink non-coherent transmission, the network device needs to configure multiple CSI reporting configurations for the terminal device so that the terminal device reports multiple CSIs based on different transmission schemes. For example, the terminal device obtains the CSI of TRP1 and TRP2 when a single TRP is scheduled based on CSI reporting configuration 1 and CSI reporting configuration 2 (without considering the interference between TRPs), and obtains the CSI of TRP1 and TRP2 when TRP1 and TRP2 are scheduled simultaneously based on CSI reporting configuration 3 and CSI reporting configuration 4 (considering the interference between TRPs). This reporting method requires a large amount of CSI reporting overhead, which affects the uplink transmission performance; in addition, it will introduce a large CSI feedback delay, which affects the downlink transmission performance. To this end, the following technical solutions of the embodiments of the present application are proposed.

[0070] Figure 4 A flow chart of a CSI reporting and receiving method provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the method comprises the following steps:

[0071] Step 401: The terminal device determines second information in the second CSI part based on the first information in the first CSI part; wherein the first information is assumption information or two RIs, the assumption information is used to indicate the transmission assumption or measurement assumption based on the CSI reporting, the two RIs are measured based on different measurement resources, and the second information includes PMI and / or CQI.

[0072] Step 402: The terminal device reports CSI, where the CSI includes the first CSI part and the second CSI part.

[0073] In an embodiment of the present application, the terminal device reports CSI, and accordingly, the network device receives the CSI reported by the terminal device, wherein the CSI includes a first CSI part and a second CSI part. Here, optionally, the network device may be a base station, such as a gNB.

[0074] In the embodiment of the present application, the second information in the second CSI part is determined based on the first information in the first CSI part. Specifically, the terminal device determines the second information in the second CSI part according to the first information in the first CSI part; wherein the first information is assumption information or two RIs, the assumption information is used to indicate the transmission assumption or measurement assumption based on which the CSI report is based, the two RIs are measured based on different measurement resources, and the second information includes PMI and / or CQI.

[0075] In one example, the CSI consists of CSI part 1 (i.e., the first CSI part) and CSI part 2 (i.e., the second CSI part), and the terminal device determines the PMI and / or CQI contained in CSI part 2 constituting the CSI based on the assumed information in CSI part 1 constituting the CSI or based on the values ​​of the two RIs contained in CSI part 1.

[0076] In the above solution, the assumption information is used to indicate the transmission assumption or measurement assumption on which the CSI reporting is based.

[0077] In an optional manner, the assumption information is used to indicate the transmission assumption on which the CSI reporting is based. Specifically, the assumption information is used to indicate whether the CSI reporting is based on a transmission assumption of a single TRP or a transmission assumption of multiple TRPs. Here, the assumption information may also be referred to as transmission assumption information.

[0078] In another optional manner, the assumption information is used to indicate the measurement assumption on which the CSI reporting is based. Specifically, the assumption information is used to indicate whether the CSI reporting is based on a measurement assumption of a single measurement resource or a measurement assumption based on multiple measurement resources. Here, the assumption information may also be referred to as measurement assumption information.

[0079] In the above solution, the measurement resource may also be referred to as a CSI measurement resource. Further, optionally, the measurement resource includes a CMR and / or an IMR. For example, a measurement resource includes a CMR and an IMR. For example, a measurement resource includes a CMR. For example, a measurement resource includes an IMR.

[0080] In the embodiment of the present application, the first information is hypothetical information or two RIs. The technical solution of the embodiment of the present application is described below in combination with different implementation methods of the first information.

[0081] ●The first information is hypothetical information

[0082] The terminal device determines the PMI and / or CQI in the second CSI part based on the assumption information in the first CSI part.

[0083] A) When the value of the assumed information is a first value, the terminal device determines that the second CSI part includes 1 PMI.

[0084] The value of the assumption information is a first value corresponding to a transmission assumption of a single TRP or a measurement assumption of a single measurement resource. In this case, the second CSI part contains 1 PMI.

[0085] Furthermore, all information in the CSI is measured based on a single measurement resource. For example, all information in the CSI is measured based on measurement resource 1.

[0086] B1) When the value of the assumed information is the second value, the terminal device determines that the second CSI part includes 2 PMIs and k CQIs, and the value of k is 0 or 1.

[0087] Here, the second value is different from the first value. In other words, when the value of the assumption information is not the first value, the terminal device determines that the second CSI part includes 2 PMIs and k CQIs.

[0088] The value of the assumption information is a second value corresponding to a transmission assumption of multiple TRPs or a measurement assumption of multiple measurement resources. In this case, the second CSI part includes 2 PMIs and k CQIs.

[0089] Furthermore, the two PMIs are measured based on different measurement resources. For example, the first PMI of the two PMIs is measured based on measurement resource 1, and the second PMI of the two PMIs is measured based on measurement resource 2.

[0090] In an optional manner, when the value of k is 0, the CQI included in the first CSI part is calculated based on the two PMIs.

[0091] In another optional manner, when the value of k is 1, the CQI contained in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI contained in the second CSI part is calculated based on the second PMI of the two PMIs.

[0092] In the above scheme, optionally, the value of k is determined according to the CSI reporting configuration corresponding to the CSI, or the number of control resource set CORESET group indexes configured by the network device, or the value of the assumed information. For example, the value of k can be indicated in the CSI reporting configuration corresponding to the CSI. For example, when the number of CORESET group indexes configured by the network device is 1, k=0; when the number of CORESET group indexes configured by the network device is 2, k=1. For example, when the value of the assumed information is 1, k=0; when the value of the assumed information is 2, k=1.

[0093] B2) Further, optionally, when the value of the assumed information is a second value, the second CSI part includes 1 RI, and the RI and the RI included in the first CSI part are measured based on different measurement resources. For example: the RI included in the first CSI part is measured based on measurement resource 1, and the RI included in the second CSI part is measured based on measurement resource 2.

[0094] Here, the sum of the RI included in the second CSI part and the RI included in the first CSI part is less than or equal to the maximum number of transmission layers supported by the terminal device.

[0095] B3) Further, optionally, when the value of the assumed information is a second value, the second CSI part includes 1 CRI, and the CRI and the CRI included in the first CSI part are measured based on different measurement resource sets. For example: the CRI included in the first CSI part is measured based on measurement resource set 1, and the CRI included in the second CSI part is measured based on measurement resource set 2.

[0096] In the above solution, in one example, the first value is 0, and the second value is 1 or 2.

[0097] It should be noted that B1) in the above solution can be implemented alone or in combination with B2) and / or B3).

[0098] In an embodiment of the present application, the coding rate of the PUSCH or PUCCH carrying the second CSI part needs to be less than or equal to a threshold value (referred to as the first threshold value). If the coding rate of the PUSCH or PUCCH carrying the second CSI part exceeds the first threshold value, the terminal device discards at least one of the multiple information in the second CSI part according to the priority order of the multiple information, wherein the priority corresponding to the discarded information is lower than the priority corresponding to the information that is not discarded, that is, the information with lower priority is discarded first until the coding rate of the PUSCH or PUCCH carrying the second CSI part needs to be less than or equal to the first threshold value.

[0099] Here, the priority of the first PMI in the second CSI part is higher than the priority of other information in the second CSI part, and the first PMI has a corresponding relationship with the RI in the first CSI part. In other words, the priority of the PMI in the second CSI part corresponding to the RI in the first CSI part is higher than the priority of other information in the second CSI part.

[0100] ●The first information is 2 RIs

[0101] The terminal device determines the PMI and / or CQI in the second CSI part according to the values ​​of the two RIs in the first CSI part.

[0102] Here, the two RIs are measured based on different measurement resources. For example, the first RI of the two RIs is measured based on measurement resource 1, and the second RI of the two RIs is measured based on measurement resource 2.

[0103] Here, the sum of the two RIs is less than or equal to the maximum number of transmission layers supported by the terminal device.

[0104] a) If the value of the first RI of the two RIs is 0 and the value of the second RI is not 0, the terminal device determines that the second CSI part contains 1 PMI.

[0105] The value of the first RI of the two RIs is 0 and the value of the second RI is not 0, corresponding to the transmission assumption of a single TRP or the measurement assumption of a single measurement resource. In this case, the second CSI part includes 1 PMI. Here, the PMI corresponds to the second RI (i.e., non-zero RI).

[0106] Here, the PMI and CQI included in the CSI are both calculated based on the second RI.

[0107] b) If the values ​​of the first RI and the second RI of the two RIs are both greater than 0, the terminal device determines that the second CSI part contains 2 PMIs and k CQIs, the value of k is 0 or 1, wherein the first PMI of the two PMIs corresponds to the first RI, and the second PMI of the two PMIs corresponds to the second RI.

[0108] The values ​​of the first RI and the second RI of the two RIs are both greater than 0, corresponding to the transmission hypothesis of multiple TRPs or the measurement hypothesis of multiple measurement resources. In this case, the second CSI part contains 2 PMIs and k CQIs.

[0109] In an optional manner, when the value of k is 0, the CQI included in the first CSI part is calculated based on the two RIs and the two PMIs.

[0110] In another optional manner, when the value of k is 1, the CQI contained in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI contained in the second CSI part is calculated based on the second PMI of the two PMIs.

[0111] In the above scheme, optionally, the value of k is based on the CSI reporting configuration corresponding to the CSI, or the number of CORESET group indexes configured by the network device. For example, the value of k can be indicated in the CSI reporting configuration corresponding to the CSI. For example, when the number of CORESET group indexes configured by the network device is 1, k=0; when the number of CORESET group indexes configured by the network device is 2, k=1.

[0112] Further, optionally, the first CSI part or the second CSI part further includes two CRIs, and the two CRIs are measured based on different measurement resource sets. For example, one CRI is measured based on measurement resource set 1, and the other CRI is measured based on measurement resource set 2.

[0113] In an embodiment of the present application, the coding rate of the PUSCH or PUCCH carrying the second CSI part needs to be less than or equal to a threshold value (referred to as the first threshold value). If the coding rate of the PUSCH or PUCCH carrying the second CSI part exceeds the first threshold value, the terminal device discards at least one of the multiple information in the second CSI part according to the priority order of the multiple information, wherein the priority corresponding to the discarded information is lower than the priority corresponding to the information that is not discarded, that is, the information with lower priority is discarded first until the coding rate of the PUSCH or PUCCH carrying the second CSI part needs to be less than or equal to the first threshold value.

[0114] Here, the priority of the first PMI in the second CSI part is higher than the priority of other information in the second CSI part, and the first PMI has a corresponding relationship with the first RI of the two RIs included in the first CSI part. In other words, the priority of the PMI in the second CSI part corresponding to the first RI of the two RIs included in the first CSI part (i.e., the first PMI) is higher than the priority of other information in the second CSI part.

[0115] According to the technical solution of the embodiment of the present application, the terminal device determines the PMI and / or CQI contained in the second CSI part constituting the CSI according to the assumed information in the first CSI part constituting the CSI or according to the values ​​of the two RIs contained in the first CSI part, thereby reporting the CSI. By adopting the technical solution of the embodiment of the present application, different transmission schemes can be indicated by the first CSI part, and the terminal device can report the PMI and / or CQI corresponding to the indicated transmission scheme in the second CSI part, so that flexible switching between different transmission schemes can be supported with very low CSI feedback overhead.

[0116] The technical solution of the embodiment of the present application is illustrated below in combination with a specific application example. It should be noted that the CSI part 1 in the following application example corresponds to the first CSI part in the embodiment of the present application, and the CSI part 2 corresponds to the second CSI part in the embodiment of the present application. The network device in the following application example can be a base station, such as a gNB.

[0117] Application Example 1

[0118] Reference Figure 5 The CSI reporting method of this application example includes the following process:

[0119] Step 501: The network device configures two groups of CSI measurement resources in the CSI reporting configuration.

[0120] Here, two groups of CSI measurement resources correspond to two collaborative TRPs respectively, and each group of CSI measurement resources includes at least one measurement resource corresponding to one TRP (ie, at least one CMR and at least one IMR).

[0121] Step 502: The terminal device performs measurement based on the two groups of CSI measurement resources, determines assumption information, and reports the assumption information through CSI part 1 that constitutes the CSI.

[0122] Here, the assumption information is used to indicate whether the CSI reporting is based on a transmission assumption of a single TRP or a transmission assumption of multiple TRPs, or the assumption information is used to indicate whether the CSI reporting is based on a measurement assumption of a single measurement resource or a measurement assumption of multiple measurement resources. In an optional manner, if it is based on a transmission assumption of a single TRP or a measurement assumption based on a single measurement resource, the CSI reported by the terminal device may include uplink control information corresponding to one TRP or one measurement resource. In another optional manner, if it is based on a transmission assumption of multiple TRPs or a measurement assumption based on multiple measurement resources, the CSI reported by the terminal device may include uplink control information corresponding to multiple TRPs or multiple measurement resources, or may include uplink control information obtained by joint measurement of multiple TRPs or multiple measurement resources.

[0123] In this application example, the terminal device can determine the hypothesis information in the following manner: the terminal device can perform CSI measurement based on the transmission hypothesis of a single TRP and the transmission hypothesis of two TRPs, respectively, so as to select the better transmission hypothesis and determine the corresponding transmission hypothesis information (referred to as hypothesis information). Alternatively, the terminal can perform CSI measurement based on the measurement hypothesis of a single measurement resource and the measurement hypothesis of two measurement resources, respectively, so as to select the better measurement hypothesis and determine the corresponding measurement hypothesis information (referred to as hypothesis information).

[0124] It should be noted that CSI measurement refers to measurement of CMR and / or IMR. The measurement resource may be replaced by CMR and IMR, or replaced by CMR, or replaced by IMR.

[0125] Step 503: The terminal device determines the PMI and / or CQI included in the CSI part 2 constituting the CSI based on the assumption information in the CSI part 1, where the assumption information is used to indicate the transmission assumption or measurement assumption on which the CSI reporting is based.

[0126] For the convenience of description, the following description is made by taking the transmission assumption information (TAI) as an example. The uplink control information included in the CSI part 2 is described below.

[0127] ●In one implementation manner, when the value of TAI in CSI part 1 is the first value, CSI part 2 includes only one PMI.

[0128] In an example, the first value is 0. In this case, the CSI reporting is based on the transmission assumption of a single TRP or the CSI reporting is based on the measurement assumption of a single measurement resource. Figure 6-1As shown, all the information in the CSI is measured based on the first group of CSI measurement resources (ie, CMR0 and IMR0). The terminal device can reuse the existing CSI reporting mechanism to report the CSI.

[0129] like Figure 6-1 As shown, CSI part 1 may include RI and CQI, and CSI part 2 may include 1 PMI.

[0130] Further, optionally, if the value of the RI is greater than 4, the CSI part 2 may also include another CQI, wherein the CQI in the CSI part 1 corresponds to the first code, and the CQI in the CSI part 2 corresponds to the second code.

[0131] ● In another implementation, when the value of TAI in CSI part 1 is the second value, CSI part 2 includes 2 PMIs and k CQIs, where k=0 or 1. The 2 PMIs are measured based on different measurement resources.

[0132] In an example, the second value is 1 or 2. In this case, the reporting of CSI is based on a transmission assumption based on multiple TRPs or the reporting of CSI is based on a measurement assumption based on multiple measurement resources. Figure 6-2 and Figure 6-3 As shown, the information in the CSI is measured based on the first group of CSI measurement resources (ie, CMR0 and IMR0) and the second group of CSI measurement resources (ie, CMR1 and IMR1). The terminal device needs to report uplink control information corresponding to two TRPs or two measurement resources.

[0133] Optionally, the value of k can be determined according to the CSI reporting configuration corresponding to the CSI, or the number of CORESET group indexes configured by the network device, or the value of TAI. For example, the value of k can be indicated in the CSI reporting configuration corresponding to the CSI. For example, when the number of CORESET group indexes configured by the network device is 1, k = 0; when the number of CORESET group indexes configured by the network device is 2, k = 1. For example, when the value of TAI is 1, k = 0; when the value of TAI is 2, k = 1.

[0134] The following describes the contents of CSI part 1 and CSI part 2 and the calculation method of the contents in combination with different values ​​of k.

[0135] Case 1: k = 0

[0136] Here, when k=0, the CSI reporting is based on the transmission assumption of multiple TRPs scheduled by a single DCI (ie, two TRPs are jointly scheduled). At this time, the CQI contained in CSI part 1 is calculated based on the two PMIs, and CSI part 2 does not contain CQI.

[0137] Furthermore, the CSI part 2 may also include an RI, and the RI and the RI included in the CSI part 1 are measured based on different measurement resources.

[0138] For example, Figure 6-2 As shown, the CSI part 1 includes TAI, RI0 and CQI0, and the CSI part 2 includes RI1, PMI0 and PMI1, wherein RI0 and PMI0 are measured based on a set of CMR and IMR (i.e., CMR0 and IMR0), and RI1 and PMI2 are measured based on another set of CMR and IMR (i.e., CMR1 and IMR1). CQI0 is calculated based on the channel estimated by the terminal device and PMI0 and PMI1, that is, CQI0 is a CQI jointly estimated based on the channel measurement results of two TRPs.

[0139] It should be noted that Figure 6-2 It is assumed that the two groups of CSI measurement resources configured by the network device each include only one CMR and one IMR. In this case, the terminal device does not need to report CRI.

[0140] Further, optionally, in the case where a group of CSI measurement resources configured by the network device includes multiple measurement resources (such as multiple CMRs and multiple IMRs), the CSI part 2 may also include 1 CRI, and the CRI and the CRI included in the CSI part 1 are measured based on different measurement resource sets. For example, the CSI part 1 includes CRI0, and the CSI part 2 includes CRI1, wherein CMR0 and IMR0 are a group of CMRs and IMRs corresponding to the CRI0, and CMR1 and IMR1 are a group of CMRs and IMRs corresponding to the CRI1.

[0141] Case 2: k = 1

[0142] Here, when k=1, the CSI reporting is based on the transmission assumption of multiple TRPs scheduled by multiple DCIs (ie, two TRPs are independently scheduled), and the CQI contained in CSI part 2 and the CQI contained in CSI part 1 are calculated based on the two PMIs respectively.

[0143] Furthermore, the CSI part 2 may also include an RI, and the RI and the RI included in the CSI part 1 are measured based on different measurement resources, and the two PMIs are obtained based on the RI in the CSI part 1 and the RI in the CSI part 2 respectively.

[0144] Further, optionally, in the case where a group of CSI measurement resources configured by the network device includes multiple measurement resources (such as multiple CMRs and multiple IMRs), the CSI part 2 may also include a CRI, and the CRI and the CRI included in the CSI part 1 are measured based on different measurement resource sets. Here, it is assumed that a group of CSI measurement resources includes multiple CMRs and multiple IMRs, and the terminal device needs to select one CMR and one IMR from them and report the corresponding CRI. For example, Figure 6-3 As shown, the CSI part 1 includes CRI0, RI0, CQI0 and TAI, and the CSI part 2 includes CRI1, RI1, PMI0, PMI1 and CQI1, wherein RI0, PM0 and CQI0 are measured based on a group of CMR and IMR (i.e., CMR0 and IMR0) (CMR0 and IMR0 are a group of CMR and IMR corresponding to the CRI0), and RI1, PMI1 and CQI1 are measured based on another group of CMR and IMR (i.e., CMR1 and IMR1) (CMR1 and IMR1 are a group of CMR and IMR corresponding to the CRI1).

[0145] In the above two cases, the sum of the RIs in the CSI part 1 and the CSI part 2 cannot exceed the maximum number of transmission layers supported by the terminal device. Further, the sum of the RIs in the CSI part 1 and the CSI part 2 cannot exceed 4.

[0146] In one implementation, the terminal device or the network device may determine the number of information bits included in the CSI part 2 based on the assumption information, thereby generating or detecting the CSI part 2.

[0147] It should be noted that the assumption information based on which the CSI reporting is based corresponds to the number of PMI / CQI contained in the CSI, so the assumption information can also be PMI number information or CQI number information, that is, the assumption information can be used to indicate the number of PMIs or CQIs contained in the CSI.

[0148] In the technical solution of the embodiment of the present application, the terminal device indicates a transmission hypothesis or measurement hypothesis with the best current performance through hypothesis information, and the network device can schedule downlink transmission based on the transmission hypothesis or measurement hypothesis, thereby supporting flexible switching between different transmission schemes. At the same time, since the terminal device only needs to report the CSI corresponding to one transmission hypothesis or one measurement hypothesis, it is not necessary to report the CSI corresponding to multiple transmission hypotheses or multiple measurement hypotheses, which can significantly reduce the overhead of CSI feedback. Furthermore, the content contained in CSI part 2 is determined based on the hypothesis information in CSI part 1, and the bit size and occupied resources of CSI part 2 can be flexibly adjusted based on different feedback contents, thereby avoiding unnecessary waste of uplink resources.

[0149] Step 504: The terminal device reports CSI according to the determined CSI part 1 and CSI part 2.

[0150] Here, the CSI consists of CSI part 1 and CSI part 2. Optionally, the CSI part 1 and CSI part 2 may be reported by referring to the method in the related art.

[0151] When the code rate of the PUSCH or PUCCH carrying the CSI part 2 exceeds a preset threshold, the information with lower priority is discarded first according to the priority order of multiple information in the CSI part 2. Here, the threshold can be calculated by the terminal device or configured to the terminal device by the network device.

[0152] In an optional manner, the priority of the PMI in CSI part 2 corresponding to the RI in CSI part 1 is higher than the priority of other information in CSI part 2.

[0153] Application Example 2

[0154] Reference Figure 7 The CSI reporting method of this application example includes the following process:

[0155] Step 701: The network device configures two groups of CSI measurement resources in the CSI reporting configuration.

[0156] Here, two groups of CSI measurement resources correspond to two collaborative TRPs respectively, and each group of CSI measurement resources includes at least one measurement resource corresponding to one TRP (ie, at least one CMR and at least one IMR).

[0157] Step 702: The terminal device performs measurement based on the two groups of CSI measurement resources to obtain two corresponding RIs, and reports the two RIs through the CSI part 1 that constitutes the CSI.

[0158] Here, the first group of CSI measurement resources corresponds to the first RI of the two RIs, and the second group of CSI measurement resources corresponds to the second RI of the two RIs.

[0159] Step 703: The terminal device determines the PMI and / or CQI included in the CSI part 2 constituting the CSI according to the values ​​of the two RIs in the CSI part 1.

[0160] The uplink control information included in the CSI part 2 is described below.

[0161] ●In one embodiment, when one of the two RIs (i.e., the first RI) has a value of 0 and the other RI (i.e., the second RI) has a value other than 0, the CSI part 2 contains only one PMI, which corresponds to the second RI (i.e., the number of columns of the PMI is equal to the second RI, or the PMI is calculated based on the second RI).

[0162] At this time, the CSI reporting is based on the transmission assumption of a single TRP or the CSI reporting is based on the measurement assumption of a single measurement resource. Figure 8-1 As shown, all the information in the CSI is measured based on the first group of CSI measurement resources (ie, CMR0 and IMR0).

[0163] Furthermore, CSI part 1 may include 1 CQI. Figure 8-1 As shown, the CSI part 1 includes RI0>0, RI1=0 and CQI, and the CSI part 2 includes PMI. Further, optionally, if the value of the RI0 is greater than 4, the CSI part 2 may also include another CQI, wherein the CQI in the CSI part 1 corresponds to the first code, and the CQI in the CSI part 2 corresponds to the second code I.

[0164] When the value of one of the two RIs is 0, there is no restriction on the value of the other non-zero RI.

[0165] In another implementation, if the values ​​of the two RIs are both greater than 0, the CSI part 2 includes 2 PMIs and k CQIs, where k=0 or 1. The two PMIs correspond to the two RIs respectively.

[0166] Here, the two PMIs are respectively obtained by measuring the same measurement resources as the two RIs. For example, the first PMI of the two PMIs and the first RI of the two RIs are measured based on the same measurement resources (such as the first group of CSI measurement resources), and the second PMI of the two PMIs and the second RI of the two RIs are measured based on the same measurement resources (such as the second group of CSI measurement resources).

[0167] In this case, the CSI reporting is based on the transmission assumption of multiple TRPs or the CSI reporting is based on the measurement assumption of multiple measurement resources. Figure 8-2 and Figure 8-3 As shown, the information in the CSI is measured based on the first group of CSI measurement resources (ie, CMR0 and IMR0) and the second group of CSI measurement resources (ie, CMR1 and IMR1). The terminal device needs to report uplink control information corresponding to two TRPs or two measurement resources.

[0168] Optionally, the value of k may be based on the CSI reporting configuration corresponding to the CSI, or the number of CORESET group indexes configured by the network device. For example, the value of k may be indicated in the CSI reporting configuration corresponding to the CSI. For example, when the number of CORESET group indexes configured by the network device is 1, k=0; when the number of CORESET group indexes configured by the network device is 2, k=1.

[0169] The following describes the contents of CSI part 1 and CSI part 2 and the calculation method of the contents in combination with different values ​​of k.

[0170] Case 1: k = 0

[0171] Here, when k=0, the CSI reporting is based on the transmission assumption of multiple TRPs scheduled by a single DCI (ie, two TRPs are jointly scheduled). At this time, the CQI contained in CSI part 1 is calculated based on the two RIs and the two PMIs, and CSI part 2 does not contain CQI.

[0172] For example, Figure 8-2 As shown, the CSI part 1 includes RI0>0, RI1>0 and CQI0, and the CSI part 2 includes PMI0 and PMI1, wherein RI0 and PMI1 are measured based on a set of CMR and IMR (i.e., CMR0 and IMR0), and RI1 and PMI1 are measured based on another set of CMR and IMR (i.e., CMR1 and IMR1). CQI0 is calculated based on the channel estimated by the terminal device and PMI0 and PMI1, that is, CQI0 is a CQI jointly estimated based on the channel measurement results of the two TRPs.

[0173] It should be noted that Figure 8-2 It is assumed that the two groups of CSI measurement resources configured by the network device each include only one CMR and one IMR. In this case, the terminal device does not need to report CRI.

[0174] Further, optionally, in the case where a group of CSI measurement resources configured by the network device includes multiple measurement resources (such as multiple CMRs and multiple IMRs), the CSI part 1 may also include two CRIs, and the two CRIs are measured based on different measurement resource sets. For example, the CSI part 1 also includes CRI0 and CRI1, wherein CMR0 and IMR0 are a group of CMRs and IMRs corresponding to the CRI0, and CMR1 and IMR1 are a group of CMRs and IMRs corresponding to the CRI1.

[0175] Case 2: k = 1

[0176] Here, when k=1, the CSI reporting is based on the transmission assumption of multiple TRPs scheduled by multiple DCIs (ie, two TRPs are independently scheduled), and the CQI contained in CSI part 2 and the CQI contained in CSI part 1 are calculated based on the two PMIs respectively.

[0177] Further, optionally, in the case where a group of CSI measurement resources configured by the network device includes multiple measurement resources (such as multiple CMRs and multiple IMRs), the CSI may also include two CRIs, and the two CRIs are measured based on different sets of measurement resources. Here, it is assumed that a group of CSI measurement resources includes multiple CMRs and multiple IMRs, and the terminal device needs to select one CMR and one IMR from them, and report the corresponding CRI. Two groups of CSI measurement resources correspond to two CRIs, and these two CRIs can be both in CSI part 1, or both in CSI part 2, or one in CSI part 1 and the other in CSI part 2. For example, Figure 8-3 As shown, the CSI part 1 includes CRI0, CRI1, RI0>0, RI1>0 and CQI0, and the CSI part 2 includes PMI0, PMI1 and CQI1, wherein RI0, PMI0 and CQI0 are measured based on a group of CMR and IMR (i.e., CMR0 and IMR0) (CMR0 and IMR0 are a group of CMR and IMR corresponding to the CRI0), and RI1, PMI1 and CQI1 are measured based on another group of CMR and IMR (i.e., CMR1 and IMR1) (CMR1 and IMR1 are a group of CMR and IMR corresponding to the CRI1).

[0178] In the above solution, when the two RIs are both greater than 0, the sum of the two RIs cannot exceed the maximum number of transmission layers supported by the terminal device. Furthermore, the sum of the two RIs cannot exceed 4.

[0179] In one implementation, the terminal device or the network device may determine the number of information bits included in the CSI part 2 based on the values ​​of the two RIs, thereby generating or detecting the CSI part 2.

[0180] In the technical solution of the embodiment of the present application, the terminal device indicates different transmission schemes (equivalent to transmission assumptions or measurement assumptions) through the values ​​of two RIs, and the network device can schedule downlink transmission based on the transmission schemes corresponding to the values ​​of the two RIs, thereby supporting flexible switching between different transmission schemes. At the same time, since the terminal device only needs to report the CSI corresponding to the best transmission hypothesis and does not need to report the CSI corresponding to multiple transmission hypotheses, the overhead of CSI feedback can be significantly reduced. Furthermore, the content contained in CSI part 2 is determined according to the RI value in CSI part 1, and the bit size and occupied resources of CSI part 2 can be flexibly adjusted based on different feedback contents, thereby avoiding unnecessary waste of uplink resources.

[0181] Step 704: The terminal device reports the CSI according to the determined CSI part 1 and CSI part 2.

[0182] Here, the CSI consists of CSI part 1 and CSI part 2. Optionally, the CSI part 1 and CSI part 2 may be reported by referring to the method in the related art.

[0183] When the code rate of the PUSCH or PUCCH carrying the CSI part 2 exceeds a preset threshold, the information with lower priority is discarded first according to the priority order of multiple information in the CSI part 2. Here, the threshold can be calculated by the terminal device or configured to the terminal device by the network device.

[0184] In an optional manner, the priority of the PMI in CSI part 2 corresponding to the first RI in CSI part 1 is higher than the priority of other information in CSI part 2.

[0185] Fig. 9 Schematic diagram of the structure of the CSI reporting device provided in the embodiment of the present application, which is applied to terminal equipment, such as Fig. 9 As shown, the CSI reporting device includes:

[0186] A determining unit 901 is configured to determine second information in a second CSI part according to first information in a first CSI part; wherein the first information is assumption information or two RIs, the assumption information is used to indicate a transmission assumption or a measurement assumption based on which the CSI reporting is based, the two RIs are measured based on different measurement resources, and the second information includes PMI and / or CQI;

[0187] The sending unit 902 is used to report CSI, where the CSI includes the first CSI part and the second CSI part.

[0188] In an optional manner, the assumption information is used to indicate whether the CSI reporting is based on a transmission assumption of a single TRP or a transmission assumption of multiple TRPs, or to indicate whether the CSI reporting is based on a measurement assumption of a single measurement resource or a measurement assumption of multiple measurement resources.

[0189] In an optional manner, the first information is hypothetical information.

[0190] The determination unit 901 is used to determine that the second CSI part includes 1 PMI when the value of the assumed information is a first value; when the value of the assumed information is a second value, determine that the second CSI part includes 2 PMIs and k CQIs, where the value of k is 0 or 1.

[0191] In an optional manner, when the value of the assumed information is the first value, all information in the CSI is measured based on a single measurement resource.

[0192] In an optional manner, the two PMIs are measured based on different measurement resources.

[0193] In an optional manner, when the value of k is 0, the CQI included in the first CSI part is calculated based on the two PMIs.

[0194] In an optional manner, when the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

[0195] In an optional manner, the value of k is determined according to the CSI reporting configuration corresponding to the CSI, or the number of CORESET group indexes configured by the network device, or the value of the assumption information.

[0196] In an optional manner, when the value of the assumed information is a second value, the second CSI part includes 1 RI, and the RI and the RI included in the first CSI part are measured based on different measurement resources.

[0197] In an optional manner, the sum of the RI included in the second CSI part and the RI included in the first CSI part is less than or equal to the maximum number of transmission layers supported by the terminal device.

[0198] In an optional manner, when the value of the assumed information is a second value, the second CSI part includes 1 CRI, and the CRI and the CRI included in the first CSI part are measured based on different measurement resource sets.

[0199] In an optional manner, the first information is 2 RIs.

[0200] The determining unit 901 is configured to determine that the second CSI part includes one PMI if the value of the first RI of the two RIs is 0 and the value of the second RI is not 0.

[0201] In an optional manner, the PMI and CQI included in the CSI are both calculated based on the second RI.

[0202] In an optional manner, the first information is 2 RIs.

[0203] The determination unit 901 is used to determine that the second CSI part includes 2 PMIs and k CQIs if the values ​​of the first RI and the second RI of the two RIs are both greater than 0, and the value of k is 0 or 1, wherein the first PMI of the two PMIs corresponds to the first RI, and the second PMI of the two PMIs corresponds to the second RI.

[0204] In an optional manner, when the value of k is 0, the CQI included in the first CSI part is calculated based on the two RIs and the two PMIs.

[0205] In an optional manner, when the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

[0206] In an optional manner, the value of k is based on the CSI reporting configuration corresponding to the CSI, or the number of CORESET group indexes configured by the network device.

[0207] In an optional manner, the first CSI part or the second CSI part includes 2 CRIs, and the 2 CRIs are measured based on different measurement resource sets.

[0208] In an optional manner, the sum of the two RIs is less than or equal to the maximum number of transmission layers supported by the terminal device.

[0209] In an optional manner, the device further includes:

[0210] a processing unit (not shown in the figure), configured to discard at least one of the multiple information according to the priority order of the multiple information in the second CSI part if the code rate of the PUSCH or PUCCH carrying the second CSI part exceeds the first threshold value, wherein the priority corresponding to the discarded information is lower than the priority corresponding to the information not discarded;

[0211] The priority of the first PMI in the second CSI part is higher than the priority of other information in the second CSI part, and the first PMI has a corresponding relationship with the RI in the first CSI part.

[0212] In an optional manner, the device further includes:

[0213] a processing unit, configured to discard at least one of the multiple information in the second CSI part according to a priority order of the multiple information if a code rate of the PUSCH or PUCCH carrying the second CSI part exceeds a first threshold value, wherein the priority corresponding to the discarded information is lower than the priority corresponding to the non-discarded information;

[0214] The priority of the first PMI in the second CSI part is higher than the priority of other information in the second CSI part, and the first PMI corresponds to the first RI of the two RIs included in the first CSI part.

[0215] In an optional manner, the measurement resources include CMR and / or IMR.

[0216] Those skilled in the art should understand that the relevant description of the above-mentioned CSI reporting device in the embodiment of the present application can be understood by referring to the relevant description of the CSI reporting and receiving method in the embodiment of the present application.

[0217] Fig.10 Schematic diagram of the structure of the CSI receiving device provided in the embodiment of the present application, which is applied to network equipment, such as Fig.10 As shown, the CSI receiving device includes:

[0218] A receiving unit 1001 receives CSI reported by a terminal device, wherein the CSI includes a first CSI part and a second CSI part, and second information in the second CSI part is determined based on the first information in the first CSI part; wherein the first information is assumption information or two RIs, and the assumption information is used to indicate a transmission assumption or a measurement assumption based on which the CSI reporting is based, and the two RIs are measured based on different measurement resources, and the second information includes PMI and / or CQI.

[0219] In an optional manner, the assumption information is used to indicate whether the CSI reporting is based on a transmission assumption of a single TRP or a transmission assumption of multiple TRPs, or to indicate whether the CSI reporting is based on a measurement assumption of a single measurement resource or a measurement assumption of multiple measurement resources.

[0220] In an optional manner, the first information is hypothetical information.

[0221] When the value of the assumption information is the first value, the second CSI part includes 1 PMI;

[0222] When the value of the assumed information is the second value, the second CSI part includes 2 PMIs and k CQIs, and the value of k is 0 or 1.

[0223] In an optional manner, when the value of the assumed information is the first value, all information in the CSI is measured based on a single measurement resource.

[0224] In an optional manner, the two PMIs are measured based on different measurement resources.

[0225] In an optional manner, when the value of k is 0, the CQI included in the first CSI part is calculated based on the two PMIs.

[0226] In an optional manner, when the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

[0227] In an optional manner, the value of k is determined according to the CSI reporting configuration corresponding to the CSI, or the number of control resource set CORESET group indexes configured by the network device, or the value of the assumption information.

[0228] In an optional manner, when the value of the assumed information is a second value, the second CSI part includes 1 RI, and the RI and the RI included in the first CSI part are measured based on different measurement resources.

[0229] In an optional manner, the sum of the RI included in the second CSI part and the RI included in the first CSI part is less than or equal to the maximum number of transmission layers supported by the terminal device.

[0230] In an optional manner, when the value of the assumed information is a second value, the second CSI part includes 1 CRI, and the CRI and the CRI included in the first CSI part are measured based on different measurement resource sets.

[0231] In an optional manner, the first information is 2 RIs.

[0232] If the value of the first RI of the two RIs is 0 and the value of the second RI is not 0, the second CSI part includes 1 PMI.

[0233] In an optional manner, the PMI and CQI included in the CSI are both calculated based on the second RI.

[0234] In an optional manner, the first information is 2 RIs.

[0235] If the values ​​of the first RI and the second RI of the two RIs are both greater than 0, the second CSI part includes 2 PMIs and k CQIs, the value of k is 0 or 1, wherein the first PMI of the two PMIs corresponds to the first RI, and the second PMI of the two PMIs corresponds to the second RI.

[0236] In an optional manner, when the value of k is 0, the CQI included in the first CSI part is calculated based on the two RIs and the two PMIs.

[0237] In an optional manner, when the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

[0238] In an optional manner, the value of k is based on the CSI reporting configuration corresponding to the CSI, or the number of CORESET group indexes configured by the network device.

[0239] In an optional manner, the first CSI part or the second CSI part includes 2 CRIs, and the 2 CRIs are measured based on different measurement resource sets.

[0240] In an optional manner, the sum of the two RIs is less than or equal to the maximum number of transmission layers supported by the terminal device.

[0241] In an optional manner, the measurement resources include CMR and / or IMR.

[0242] Those skilled in the art should understand that the relevant description of the above-mentioned CSI receiving device in the embodiment of the present application can be understood by referring to the relevant description of the CSI reporting and receiving method in the embodiment of the present application.

[0243] Fig.11 1 is a schematic structural diagram of a communication device 1100 provided in an embodiment of the present application. The communication device may be a terminal device or a network device. Fig.11 The communication device 1100 shown includes a processor 1110, and the processor 1110 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0244] Alternatively, if Fig.11 As shown, the communication device 1100 may further include a memory 1120. The processor 1110 may call and run a computer program from the memory 1120 to implement the method in the embodiment of the present application.

[0245] The memory 1120 may be a separate device independent of the processor 1110 , or may be integrated into the processor 1110 .

[0246] Alternatively, if Fig.11 As shown, the communication device 1100 may further include a transceiver 1130, and the processor 1110 may control the transceiver 1130 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0247] The transceiver 1130 may include a transmitter and a receiver. The transceiver 1130 may further include an antenna, and the number of the antennas may be one or more.

[0248] Optionally, the communication device 1100 may specifically be a network device of an embodiment of the present application, and the communication device 1100 may implement corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.

[0249] Optionally, the communication device 1100 may specifically be a mobile terminal / terminal device of an embodiment of the present application, and the communication device 1100 may implement the corresponding processes implemented by the mobile terminal / terminal device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0250] Fig.12 It is a schematic structural diagram of the chip of an embodiment of the present application. Fig.12The chip 1200 shown includes a processor 1210 , which can call and run a computer program from a memory 1220 to implement the method in the embodiment of the present application, and optionally, also includes an input interface 1230 and an output interface 1240 .

[0251] Fig.13 1 is a schematic block diagram of a communication system 1300 provided in an embodiment of the present application. Fig.13 As shown, the communication system 1300 includes a terminal device 1310 and a network device 1320 .

[0252] Among them, the terminal device 1310 can be used to implement the corresponding functions implemented by the terminal device in the above method, and the network device 1320 can be used to implement the corresponding functions implemented by the network device in the above method. For the sake of brevity, they are not repeated here.

[0253] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0254] Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0255] Optionally, the computer program product can be applied to the mobile terminal / terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0256] The embodiment of the present application also provides a computer program.

[0257] Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program runs on a computer, the computer executes the corresponding processes implemented by the network device in the various methods in the embodiments of the present application. For the sake of brevity, they are not described here.

[0258] Optionally, the computer program can be applied to the mobile terminal / terminal device in the embodiments of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the mobile terminal / terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.

[0259] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0260] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0261] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0262] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0263] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0264] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0265] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for reporting channel state information (CSI), the method comprising: The terminal device determines second information in the second CSI part according to the first information in the first CSI part; wherein the second information includes precoding matrix indication information PMI and / or channel quality indication information CQI; The terminal device reports CSI, where the CSI includes the first CSI part and the second CSI part; The terminal device determines the second information in the second CSI part according to the first information in the first CSI part, including: When the value of the first information is a first value, the terminal device determines that the second CSI part includes 1 PMI, wherein all information in the CSI is measured based on a single measurement resource; When the value of the first information is a second value, the terminal device determines that the second CSI part includes 2 PMIs and k CQIs, where the value of k is 0 or 1, wherein the two PMIs are measured based on different measurement resources, and when the value of k is 0, the CQI included in the first CSI part is calculated based on the two PMIs; The measurement resources include channel measurement resources CMR and / or interference measurement resources IMR.

2. The method according to claim 1, wherein: When the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

3. The method according to claim 1 or 2, wherein: The value of k is determined according to the CSI reporting configuration corresponding to the CSI, or the number of control resource set CORESET group indexes configured by the network device, or the value of the first information.

4. The method according to claim 1, wherein: When the value of the first information is the second value, the second CSI part includes 1 RI, and the RI and the RI included in the first CSI part are measured based on different measurement resources.

5. The method according to claim 4, wherein: The sum of the RI included in the second CSI part and the RI included in the first CSI part is less than or equal to the maximum number of transmission layers supported by the terminal device.

6. The method according to claim 1 or 5, wherein: When the value of the first information is the second value, the second CSI part includes 1 CRI, and the CRI and the CRI included in the first CSI part are measured based on different measurement resource sets.

7. The method according to claim 1 or 2, wherein: The method further comprises: If the code rate of the physical uplink shared channel PUSCH or the physical uplink control channel PUCCH carrying the second CSI part exceeds the first threshold value, the terminal device discards at least one of the multiple information according to the priority order of the multiple information in the second CSI part, wherein the priority corresponding to the discarded information is lower than the priority corresponding to the information not discarded; The priority of the first PMI in the second CSI part is higher than the priority of other information in the second CSI part, and the first PMI has a corresponding relationship with the RI in the first CSI part.

8. A CSI receiving method, the method comprising: The network device receives CSI reported by the terminal device, the CSI including a first CSI part and a second CSI part, and second information in the second CSI part is determined based on the first information in the first CSI part; wherein the second information includes PMI and / or CQI; When the value of the first information is the first value, the second CSI part includes 1 PMI, wherein all information in the CSI is measured based on a single measurement resource; When the value of the first information is a second value, the second CSI part includes 2 PMIs and k CQIs, and the value of k is 0 or 1, wherein the two PMIs are measured based on different measurement resources, and when the value of k is 0, the CQI included in the first CSI part is calculated based on the two PMIs; The measurement resources include channel measurement resources CMR and / or interference measurement resources IMR.

9. The method according to claim 8, wherein: When the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

10. The method according to claim 8 or 9, wherein: The value of k is determined according to the CSI reporting configuration corresponding to the CSI, or the number of control resource set CORESET group indexes configured by the network device, or the value of the first information.

11. The method according to claim 8, wherein: When the value of the first information is the second value, the second CSI part includes 1 RI, and the RI and the RI included in the first CSI part are measured based on different measurement resources.

12. The method according to claim 11, wherein: The sum of the RI included in the second CSI part and the RI included in the first CSI part is less than or equal to the maximum number of transmission layers supported by the terminal device.

13. The method according to claim 8 or 12, wherein: When the value of the first information is the second value, the second CSI part includes 1 CRI, and the CRI and the CRI included in the first CSI part are measured based on different measurement resource sets.

14. A CSI reporting device, applied to a terminal device, comprising: A determining unit, configured to determine second information in a second CSI part according to first information in the first CSI part; wherein the second information includes PMI and / or CQI; A sending unit, configured to report CSI, where the CSI includes the first CSI part and the second CSI part; The determining unit is specifically used for: When a value of the first information is a first value, determining that the second CSI part includes 1 PMI, wherein all information in the CSI is measured based on a single measurement resource; When the value of the first information is a second value, determining that the second CSI part includes 2 PMIs and k CQIs, where the value of k is 0 or 1, wherein the two PMIs are measured based on different measurement resources, and when the value of k is 0, the CQI included in the first CSI part is calculated based on the two PMIs; The measurement resources include channel measurement resources CMR and / or interference measurement resources IMR.

15. The device according to claim 14, wherein: When the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

16. The device according to claim 14 or 15, wherein: The value of k is determined according to the CSI reporting configuration corresponding to the CSI, or the number of CORESET group indexes configured by the network device, or the value of the first information.

17. The device according to claim 14, wherein: When the value of the first information is the second value, the second CSI part includes 1 RI, and the RI and the RI included in the first CSI part are measured based on different measurement resources.

18. The device according to claim 17, wherein: The sum of the RI included in the second CSI part and the RI included in the first CSI part is less than or equal to the maximum number of transmission layers supported by the terminal device.

19. The device according to claim 14 or 18, wherein: When the value of the first information is the second value, the second CSI part includes 1 CRI, and the CRI and the CRI included in the first CSI part are measured based on different measurement resource sets.

20. The device according to claim 14 or 15, wherein: The device also includes: a processing unit, configured to discard at least one of the multiple information in the second CSI part according to a priority order of the multiple information if a code rate of the PUSCH or PUCCH carrying the second CSI part exceeds a first threshold value, wherein the priority corresponding to the discarded information is lower than the priority corresponding to the non-discarded information; The priority of the first PMI in the second CSI part is higher than the priority of other information in the second CSI part, and the first PMI has a corresponding relationship with the RI in the first CSI part.

21. A CSI receiving device, applied to a network device, the device comprising: A receiving unit, receiving CSI reported by a terminal device, wherein the CSI includes a first CSI part and a second CSI part, and second information in the second CSI part is determined based on the first information in the first CSI part; wherein the second information includes a PMI and / or a CQI; When the value of the first information is the first value, the second CSI part includes 1 PMI, wherein all information in the CSI is measured based on a single measurement resource; When the value of the first information is a second value, the second CSI part includes 2 PMIs and k CQIs, and the value of k is 0 or 1, wherein the two PMIs are measured based on different measurement resources, and when the value of k is 0, the CQI included in the first CSI part is calculated based on the two PMIs; The measurement resources include channel measurement resources CMR and / or interference measurement resources IMR.

22. The device according to claim 21, wherein When the value of k is 1, the CQI included in the first CSI part is calculated based on the first PMI of the two PMIs, and the CQI included in the second CSI part is calculated based on the second PMI of the two PMIs.

23. The device according to claim 21 or 22, wherein: The value of k is determined according to the CSI reporting configuration corresponding to the CSI, or the number of control resource set CORESET group indexes configured by the network device, or the value of the first information.

24. The device according to claim 21, wherein When the value of the first information is the second value, the second CSI part includes 1 RI, and the RI and the RI included in the first CSI part are measured based on different measurement resources.

25. The device according to claim 24, wherein: The sum of the RI included in the second CSI part and the RI included in the first CSI part is less than or equal to the maximum number of transmission layers supported by the terminal device.

26. The device according to claim 21 or 25, wherein: When the value of the first information is the second value, the second CSI part includes 1 CRI, and the CRI and the CRI included in the first CSI part are measured based on different measurement resource sets.

27. A terminal device, comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 7.

28. A network device comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to call and run the computer program stored in the memory to execute the method as claimed in any one of claims 8 to 13.

29. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 1 to 7.

30. A chip, comprising: A processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes a method as claimed in any one of claims 8 to 13.

31. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 7.

32. A computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 8 to 13.

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