Communication method and related equipment

Abstract

Provided are a communication method and a related device, relating to the technical field of communications, a terminal device receiving N reference signals sent by a network device, N being an integer greater than 1; a terminal device sends a channel state information report to a network device, the channel state information report comprises a plurality of channel state information sets, each channel state information set comprises a reference signal resource indication and channel state information associated with the reference signal resource indication, and the number of the channel state information sets is less than or equal to N. Based on the above technical scheme, the terminal device can feed back the M reference signal resource indications and the channel state information associated with each reference signal resource indication to the network device in one channel state information report, so that the network device can determine appropriate hybrid precoding information according to the channel state information report. And performing hybrid precoding on the to-be-sent data.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and related equipment. Background Art

[0002] In communication systems, the application of massive multi-antenna technology plays a vital role in improving the system's spectrum efficiency. When using multiple-input multiple-output (MIMO) technology, network equipment needs to precode data before sending it to terminal devices.

[0003] Precoding is generally categorized into digital precoding, analog precoding, and hybrid precoding. Digital precoding is suitable for multi-user multiplexing, but is costly. Analog precoding is less expensive, but a single antenna panel cannot generate multiple analog beams simultaneously, making it unsuitable for multi-user multiplexing. Hybrid precoding combines digital precoding with analog precoding, enabling it to support multi-user multiplexing while also providing flexible cost control.

[0004] In order to support the above hybrid precoding method in the communication system, the network device needs to obtain a channel state information report. How the terminal device feeds back the channel state information report to the network device is a problem that needs to be solved at present. Summary of the Invention

[0005] The present application provides a communication method and related equipment, which can support network equipment in a communication system to send data to terminal equipment using a hybrid precoding method.

[0006] On the first aspect, a communication method is provided, which can be executed by a terminal device, or by a component of the terminal device (such as a processor, chip, or chip system, etc.), or by a logic module or software that can realize all or part of the terminal device functions.

[0007] The method includes: receiving N reference signals sent by a network device, where N is an integer greater than 1; sending a channel state information report to the network device, where the channel state information report includes multiple channel state information sets, each channel state information set includes a reference signal resource indication and channel state information associated with the reference signal resource indication, wherein the number of channel state information sets is less than or equal to N.

[0008] Based on the above technical solution, the terminal device can feedback M reference signal resource indications and the channel state information associated with each reference signal resource indication to the network device in a channel state information report, so that the network device can determine the appropriate hybrid precoding information based on the channel state information report to perform hybrid precoding on the data to be sent.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the number of channel state information sets is M, M≤N; the channel state information report includes a first part report, the first part report includes M reference signal resource indications, and at least one of a rank indication associated with each reference signal resource indication, a wideband channel quality indication of the first transmission block associated with each reference signal resource indication, and a subband channel quality indication of the first transmission block associated with each reference signal resource indication.

[0010] In combination with the first aspect and the foregoing implementations, in certain implementations of the first aspect, the channel state information report further includes a second partial report, where the second partial report includes at least one of a precoding matrix indicator associated with each reference signal resource indication, a wideband channel quality indicator for a second transport block associated with each reference signal resource indication, and a subband channel quality indicator for the second transport block associated with each reference signal resource indication. Thus, a portion of the contents of each channel state information set is fed back in the first partial report, and the remaining contents of each channel state information set are fed back in the second partial report.

[0011] In combination with the first aspect and the above-mentioned implementation, in some implementations of the first aspect, the second part report includes first information, the first information includes a broadband precoding matrix indication associated with each reference signal resource indication, and / or a broadband channel quality indication of a second transport block associated with each reference signal resource indication.

[0012] In combination with the first aspect and the above-mentioned implementation, in some implementations of the first aspect, the second part report also includes second information, the second information including a channel quality indication of the even subband of the second transmission block associated with each reference signal resource indication, and / or a precoding matrix indication of the even subband associated with each reference signal resource indication.

[0013] In combination with the first aspect and the above-mentioned implementation, in some implementations of the first aspect, the second part report also includes third information, the third information including a channel quality indication of the odd subband of the second transmission block associated with each reference signal resource indication, and / or a precoding matrix indication of the odd subband associated with each reference signal resource indication.

[0014] In combination with the first aspect and the above implementation manners, in some implementation manners of the first aspect, the arrangement order of the channel state information associated with each reference signal resource indication corresponds to the sorting order of the M reference signal resource indications in the first part of the report.

[0015] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the first part of the report also includes a sequence consisting of N bits, and the states of M bits out of the N bits are used to indicate M reference signal resource indications; or, the first part of the report also includes a first field, and the first field is used to indicate M reference signal resource indications.

[0016] In conjunction with the first aspect, in certain implementations of the first aspect, the channel state information report includes a first partial report, the first partial report including a first reference signal resource indication, and at least one of a rank indication associated with the first reference signal resource indication, a wideband channel quality indication of the first transport block associated with the first reference signal resource indication, and a subband channel quality indication of the first transport block associated with the first reference signal resource indication, wherein the first reference signal resource indication is one of multiple reference signal resource indications. In this way, the first partial report includes partial information in the first channel state information set, which facilitates dynamic control of feedback overhead of the channel state information report. The first channel state information set is one of multiple channel state information sets.

[0017] In combination with the first aspect and the above-mentioned implementation, in some implementations of the first aspect, the first part of the channel state information also includes a second field, and the second field is used to indicate the number K of reference signal resource indications included in the second part report, K≤M-1, M≤N.

[0018] In combination with the first aspect and the foregoing implementations, in certain implementations of the first aspect, the rank indication associated with each of the K reference signal resource indications is the same as the rank indication associated with the first reference signal resource indication. In this way, after decoding the first partial report, the network device can obtain the feedback overhead of the second partial report.

[0019] In combination with the first aspect and the foregoing implementations, in certain implementations of the first aspect, the channel state information report further includes a second partial report, where the second partial report includes K reference signal resource indicators, channel state information associated with the K reference signal resource indicators, and remaining channel state information associated with the first reference signal resource indicator, where K ≤ M-1 and M ≤ N. In this way, the second partial report includes partial information in the first channel state information set and content in the remaining K channel state information sets from the multiple channel state information sets.

[0020] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, the channel state information report also includes a second part report, the second part report includes first information, the first information includes at least one of the wideband channel quality indication of the second transmission block associated with the first reference signal resource indication, the wideband precoding matrix indication associated with the first reference signal resource indication, and at least one of the wideband precoding matrix indication associated with each reference signal resource indication in the K reference signal resource indications, the wideband channel quality indication of the first transmission block, the subband channel quality indication of the first transmission block, and the wideband channel quality indication of the second transmission block.

[0021] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, the second part report also includes second information, the second information including the precoding matrix indication of the even subband associated with the first reference signal resource indication and / or the channel quality indication of the even subband of the second transmission block, and the precoding matrix indication of the even subband associated with each reference signal resource indication in the K reference signal resource indications and / or the channel quality indication of the even subband of the second transmission block.

[0022] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, the second part report also includes third information, the third information including the precoding matrix indication of the odd subband associated with the first reference signal resource indication and / or the channel quality indication of the odd subband of the second transmission block, and the precoding matrix indication of the odd subband associated with each reference signal resource indication in the K reference signal resource indications and / or the channel quality indication of the odd subband of the second transmission block.

[0023] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the above-mentioned method also includes: receiving configuration information sent by the network device, the configuration information being used to instruct the terminal device to feedback the reference signal receiving power associated with each reference signal resource indication in the channel state information report.

[0024] In combination with the first aspect and the above implementation manners, in some implementation manners of the first aspect, the first part of the report also includes a reference signal received power associated with each reference signal resource indication.

[0025] In combination with the first aspect and the above implementation manners, in some implementation manners of the first aspect, the second part of the report also includes a reference signal received power associated with each reference signal resource indication.

[0026] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the configuration information is specifically used to instruct the terminal device to feedback the reference signal received power associated with some reference signal resource indications in the M reference signal resource indications in the channel state information report.

[0027] In combination with the first aspect and the above-mentioned implementation methods, in certain implementation methods of the first aspect, the configuration information is specifically used to instruct the terminal device to feedback a reference signal reception power greater than or equal to a first threshold in a channel state information report; or, the configuration information is specifically used to configure the terminal device to feedback a reference signal reception power greater than or equal to a power difference in a channel state information report, where the power difference is the difference between the maximum value of the reference signal reception powers associated with the M reference signal resource indications and a second threshold.

[0028] In combination with the first aspect and the above-mentioned implementation manner, in some implementation manners of the first aspect, the first part report also includes a third field, and the third field is used to indicate whether the second part report includes a reference signal received power associated with the reference signal resource indication.

[0029] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, when the third field is used to indicate that the second part report includes a reference signal received power associated with the reference signal resource indication, the first part report also includes a fourth field, and the fourth field is used to indicate the number of reference signal received powers included in the second part report.

[0030] On the second aspect, a communication method is provided, which can be executed by a network device, or by a component of the network device (such as a processor, chip, or chip system, etc.), or by a logic module or software that can realize all or part of the functions of the network device.

[0031] The method includes: sending N reference signals to a terminal device, where N is an integer greater than 1; receiving a channel state information report sent by the terminal device, where the channel state information report includes multiple channel state information sets, each channel state information set includes a reference signal resource indication and channel state information associated with the reference signal resource indication, and the channel state information report is obtained by the terminal device performing channel measurement on the N reference signals, wherein the number of channel state information sets is less than or equal to N.

[0032] In combination with the second aspect, in certain implementations of the second aspect, the number of channel state information sets is M, M≤N; the channel state information report includes a first part report, the first part report includes M reference signal resource indications, and at least one of a rank indication associated with each reference signal resource indication, a wideband channel quality indication of the first transmission block associated with each reference signal resource indication, and a subband channel quality indication of the first transmission block associated with each reference signal resource indication.

[0033] In conjunction with the second aspect and the foregoing implementations, in certain implementations of the second aspect, the channel state information report further includes a second partial report, where the second partial report includes at least one of a precoding matrix indicator associated with each reference signal resource indication, a wideband channel quality indicator for a second transport block associated with each reference signal resource indication, and a subband channel quality indicator for the second transport block associated with each reference signal resource indication. In this way, a portion of the contents of each channel state information set is fed back in the first partial report, and the remaining contents of each channel state information set are fed back in the second partial report.

[0034] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the second part report includes first information, the first information includes a broadband precoding matrix indication associated with each reference signal resource indication, and / or a broadband channel quality indication of a second transport block associated with each reference signal resource indication.

[0035] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the second part report also includes second information, the second information including a channel quality indication of the even subband of the second transmission block associated with each reference signal resource indication, and / or a precoding matrix indication of the even subband associated with each reference signal resource indication.

[0036] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the second part report also includes third information, the third information including a channel quality indication of the odd subband of the second transmission block associated with each reference signal resource indication, and / or a precoding matrix indication of the odd subband associated with each reference signal resource indication.

[0037] In combination with the second aspect and the above implementation manner, in some implementation manners of the second aspect, the arrangement order of the channel state information associated with each reference signal resource indication corresponds to the sorting order of the M reference signal resource indications in the first part of the report.

[0038] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the first part of the report also includes a sequence consisting of N bits, and the states of M bits out of the N bits are used to indicate M reference signal resource indications; or, the first part of the report also includes a first field, and the first field is used to indicate M reference signal resource indications.

[0039] In conjunction with the second aspect, in certain implementations of the second aspect, the channel state information report includes a first partial report, the first partial report including a first reference signal resource indication, and at least one of a rank indication associated with the first reference signal resource indication, a wideband channel quality indication of the first transport block associated with the first reference signal resource indication, and a subband channel quality indication of the first transport block associated with the first reference signal resource indication, wherein the first reference signal resource indication is one of multiple reference signal resource indications. In this way, the first partial report includes partial information in the first channel state information set, which facilitates dynamic control of feedback overhead of the channel state information report. The first channel state information set is one of multiple channel state information sets.

[0040] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the first part of the channel state information also includes a second field, and the second field is used to indicate the number K of reference signal resource indications included in the second part report, K≤M-1, M≤N.

[0041] In combination with the second aspect and the foregoing implementations, in certain implementations of the second aspect, the rank indication associated with each of the K reference signal resource indications is the same as the rank indication associated with the first reference signal resource indication. In this way, after decoding the first partial report, the network device can obtain the feedback overhead of the second partial report.

[0042] In combination with the second aspect and the foregoing implementations, in certain implementations of the second aspect, the channel state information report further includes a second partial report, where the second partial report includes K reference signal resource indicators, channel state information associated with the K reference signal resource indicators, and remaining channel state information associated with the first reference signal resource indicator, where K ≤ M-1 and M ≤ N. In this way, the second partial report includes partial information in the first channel state information set and content in the remaining K channel state information sets from the multiple channel state information sets.

[0043] In combination with the second aspect and the above-mentioned implementation manner, in some implementation manners of the second aspect, the channel state information report also includes a second part report, the second part report includes first information, the first information includes at least one of the wideband channel quality indication of the second transmission block associated with the first reference signal resource indication, the wideband precoding matrix indication associated with the first reference signal resource indication, and at least one of the wideband precoding matrix indication associated with each reference signal resource indication in the K reference signal resource indications, the wideband channel quality indication of the first transmission block, the subband channel quality indication of the first transmission block, and the wideband channel quality indication of the second transmission block.

[0044] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the second part report also includes second information, the second information including the precoding matrix indication of the even subband associated with the first reference signal resource indication and / or the channel quality indication of the even subband of the second transmission block, and the precoding matrix indication of the even subband associated with each reference signal resource indication in the K reference signal resource indications and / or the channel quality indication of the even subband of the second transmission block.

[0045] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the second part report also includes third information, the third information including the precoding matrix indication of the odd subband associated with the first reference signal resource indication and / or the channel quality indication of the odd subband of the second transmission block, and the precoding matrix indication of the odd subband associated with each reference signal resource indication in the K reference signal resource indications and / or the channel quality indication of the odd subband of the second transmission block.

[0046] In combination with the second aspect and the above-mentioned implementation methods, in some implementation methods of the second aspect, the above-mentioned method also includes: configuration information sent to the terminal device, the configuration information being used to instruct the terminal device to feedback the reference signal receiving power associated with each reference signal resource indication in the channel state information report.

[0047] In combination with the second aspect and the above implementation manners, in some implementation manners of the second aspect, the first part of the report also includes a reference signal received power associated with each reference signal resource indication.

[0048] In combination with the second aspect and the above implementation manner, in some implementation manners of the second aspect, the second part of the report also includes a reference signal received power associated with each reference signal resource indication.

[0049] In combination with the second aspect and the above-mentioned implementation methods, in some implementation methods of the second aspect, the configuration information is specifically used to instruct the terminal device to feedback the reference signal received power associated with some reference signal resource indications in the M reference signal resource indications in the channel state information report.

[0050] In combination with the second aspect and the above-mentioned implementation methods, in certain implementation methods of the second aspect, the configuration information is specifically used to instruct the terminal device to feedback a reference signal reception power greater than or equal to a first threshold in a channel state information report; or, the configuration information is specifically used to configure the terminal device to feedback a reference signal reception power greater than or equal to a power difference in a channel state information report, where the power difference is the difference between the maximum value of the reference signal reception powers associated with the M reference signal resource indications and the second threshold.

[0051] In combination with the second aspect and the above-mentioned implementation, in some implementations of the second aspect, the first part report also includes a third field, and the third field is used to indicate whether the second part report includes a reference signal received power associated with the reference signal resource indication.

[0052] In combination with the second aspect and the above-mentioned implementation methods, in some implementation methods of the second aspect, when the third field is used to indicate that the second part report includes a reference signal received power associated with the reference signal resource indication, the first part report also includes a fourth field, and the fourth field is used to indicate the number of reference signal received powers included in the second part report.

[0053] In a third aspect, a communication device is provided, comprising a unit for executing the various steps of the method as described in any one of the implementations in the first aspect, or a unit for executing the various steps of the method as described in any one of the implementations in the second aspect.

[0054] In a fourth aspect, a communication device is provided, comprising a processor and an interface, wherein the interface is used to send and / or receive signals, so that the processor executes the method described in any one of the implementations in any one of the above aspects.

[0055] In a fifth aspect, a communication device is provided, comprising: a processor, the processor being coupled to a memory, the memory being used to store programs or instructions, and when the programs or instructions are executed by the processor, the communication device executes the method described in any one of the implementation methods in any of the above aspects.

[0056] In the sixth aspect, a communication system is provided, which includes a network device and a terminal device, the terminal device is used to execute the method executed by the terminal device in any one of the implementations of any of the above aspects, and the network device is used to execute the method executed by the network device in any one of the implementations of any of the above aspects.

[0057] In a seventh aspect, a computer-readable medium is provided for storing a computer program. When the computer program is run on a computer, the computer is caused to execute the method described in any one of the implementations in any one of the above aspects.

[0058] In an eighth aspect, a chip is provided, on which a processing circuit (or processor) is provided, and the processing circuit (or processor) is used to execute the method in any one of the implementation modes in any one of the above aspects.

[0059] In the ninth aspect, a computer program product comprising instructions is provided, wherein the computer program product comprises: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute a method in any one of the implementations of any of the above aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A schematic diagram of the structure of a communication system provided in an embodiment of the present application;

[0061] Figure 2 A schematic diagram of the system structure of the hybrid precoder provided in an embodiment of the present application;

[0062] Figure 3 A flow chart of a communication method provided in an embodiment of the present application;

[0063] Figure 4 A flowchart of another communication method provided in an embodiment of the present application;

[0064] Figure 5 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0065] Figure 6 A schematic diagram of the structure of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings. The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions in the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. It is known to those skilled in the art that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0067] In this application, ordinal numbers such as "1", "2", "3", "first", "second", "third" and "fourth" are used to distinguish multiple objects, and are not used to limit the order of multiple objects. "Multiple" in this application refers to two or more. The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: 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 previous and next associated objects are in an "or" relationship. The term "at least one" in this application can mean "one" and "two or more". For example, at least one of A, B and C can mean seven situations: A exists alone, B exists alone, C exists alone, A and B exist at the same time, A and C exist at the same time, C and B exist at the same time, and A, B and C exist at the same time.

[0068] The technical solutions provided in this 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, universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) mobile communication system, new radio (NR), etc. The 5G mobile communication system in the embodiment of this application includes a non-standalone (NSA) 5G mobile communication system or a standalone (SA) 5G mobile communication system. The technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system. The technical solutions provided in this application can also be applied to device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-to-machine (M2M) communication, machine-type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems. The embodiments of this application are not limited to this.

[0069] Figure 1 Schematic diagram of the structure of the communication system applicable to the embodiment of the present application. Figure 1 As shown, the communication system includes a terminal 100 and a network device 200, and communication transmission can be performed between the terminal 100 and the network device 200.

[0070] The terminal in the embodiment of the present application is a terminal that accesses the above-mentioned communication system and has a wireless transceiver function or a chip or chip system that can be set at the terminal. The terminal can also be called terminal equipment, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal can be a mobile phone, tablet computer, laptop computer, PDA, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control (industrial control), wireless terminal in self-driving (selfdriving), wireless terminal in remote surgery (remote medical surgery), wireless terminal in smart grid (smart grid), wireless terminal in transportation safety (transportation safety), wireless terminal in smart city (smart city), or wireless terminal in smart home (smart home). The embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal.

[0071] The network device in the embodiment of the present application is located on the network side of the above-mentioned communication system, and has a device with wireless transceiver function or a chip or chip system that can be set in the device. The network device can also be called an access network device. The network device can be a base station, an evolved Node B (eNodeB), a radio network controller (RNC), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (for example, a home evolved Node B or a home node B), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP / TP) or a remote radio head (RRH), etc. Alternatively, the network device may also be a radio unit (RU), a centralized unit (CU), a distributed unit (DU), a centralized unit control plane (CU control plane, CU-CP) node, or a centralized unit user plane (CU user plane, CU-UP) node. This embodiment of the present application is not limited to this.

[0072] In order to facilitate understanding of the technical solutions of the embodiments of the present application, some terms involved in the embodiments of the present application are briefly explained below.

[0073] 1. Reference signal

[0074] A reference signal is a signal provided by a transmitter to a receiver for channel measurement or channel estimation. For example, a reference signal can be a signal sent by a network device to a terminal for channel measurement. In embodiments of the present application, a reference signal can be used for channel measurement, for example. Channel measurement is used to measure channel state information (CSI) of a specific measurement resource.

[0075] The network device can send a reference signal to the terminal based on the reference signal resource. The reference signal resource can be used to configure the transmission properties of the reference signal, such as the time-frequency resource location, port mapping relationship, power factor, and scrambling code.

[0076] In the embodiments of the present application, the reference signal may be a channel state information reference signal (CSI-RS) or a sounding reference signal (SRS). It should be understood that the reference signals listed above are merely exemplary and should not limit the embodiments of the present application. The embodiments of the present application do not exclude the use of other reference signals to achieve the same or similar functions.

[0077] 2. Channel state information (CSI)

[0078] Channel state information is used to characterize the channel characteristics of the communication channel between the terminal and the network device. In an embodiment of the present application, the channel state information may include at least one of: a reference signal resource indicator (RSRI), a rank indicator (RI), a channel quality indicator (CQI), a precoding matrix indicator (PMI), and a reference signal received power (RSRP).

[0079] The reference signal resource indicator is used to indicate one of N reference signals, which is associated with one of the multiple channel state information sets included in the channel state information report. When a network device transmits different reference signals, the different reference signals typically use different analog precoding. If the terminal provides feedback of the reference signal resource indicator in the channel state information, it can assist the network device in selecting the appropriate analog precoding.

[0080] The rank indication is associated with at least one reference signal resource indication, and is obtained by the terminal based on the reference signal indicated by the reference signal resource indication. The rank indication is used to indicate the number of MIMO layers for downlink transmission recommended by the terminal.

[0081] The channel quality indicator is associated with at least one reference signal resource indicator. The channel quality indicator is measured by the terminal based on the reference signal indicated by the reference signal resource indicator. The channel quality indicator is used to assist network equipment in selecting an appropriate modulation and coding scheme (MCS).

[0082] A precoding matrix indication is associated with at least one reference signal resource indication. The precoding matrix indication is measured by the terminal based on the reference signal indicated by the reference signal resource indication. The precoding matrix indication indicates the precoding matrix recommended by the terminal for the network device to use in downlink transmission. The precoding matrix indicated by the precoding matrix indication can represent channel information.

[0083] If the channel state information report includes both the precoding matrix indication and the reference signal resource indication, it can facilitate the network equipment to perform hybrid precoding, that is, use the precoding matrix indicated by the precoding matrix indication for digital precoding, and use the reference signal indicated by the reference signal resource indication for analog precoding.

[0084] The reference signal received power is associated with at least one reference signal resource indicator, and the reference signal received power is measured by the terminal based on the reference signal indicated by the reference signal resource indicator. The reference signal received power is a key parameter used to represent the strength of a wireless signal.

[0085] In some communication systems, network equipment needs to obtain channel state information reports (CSIs) fed back by terminals and precode the data to be transmitted based on these CSIs. Precoding is generally categorized into digital precoding, analog precoding, and hybrid precoding, with hybrid precoding including both digital and analog precoding.

[0086] Figure 2 This is a schematic diagram of the system structure of the hybrid precoder provided in the embodiment of the present application. Figure 2 As shown, the network device may include a digital precoder, a plurality of radio frequency chains connected to the digital precoder, a splitter connected to each radio frequency chain, a plurality of phase shifters connected to each splitter, and an antenna connected to each phase shifter.

[0087] The digital precoder can digitally precode the data to be transmitted. The digitally precoded data is transmitted to the phase shifter via the RF link and the splitter. The phase shifter performs analog precoding on the digitally precoded data, thereby achieving hybrid precoding of the data to be transmitted. The hybrid precoded data is transmitted via the antenna.

[0088] In a communication system, before a network device digitally precodes data to be transmitted, the network device may send a reference signal to a terminal, where the reference signal is a signal that has not been digitally precoded or has been fixedly digitally precoded. In addition, the network device may also send first configuration information to the terminal, where the first configuration information is used to configure the terminal to feed back a rank indication, a layer indication, a channel quality indication, and a precoding matrix indication in a channel state information report; the terminal performs channel measurement on the reference signal based on the first configuration information to obtain a channel state information report, where the channel state information report includes a channel state information set, where the channel state information set includes a rank indication, a layer indication, a channel quality indication, and a precoding matrix indication; the terminal sends the channel state information report to the network device, and the network device determines appropriate digital precoding information based on the channel state information report to digitally precode the data to be transmitted.

[0089] In a communication system, before a network device performs analog precoding on data to be transmitted, the network device may send N reference signals to a terminal, where N is an integer greater than 1, and the N reference signals are signals that have undergone different analog precoding. In addition, the network device may also send second configuration information to the terminal, where the second configuration information is used to configure the terminal to feed back a reference signal resource indication and a reference signal receiving power in a channel state information report; the terminal performs channel measurement on the N reference signals based on the second configuration information to obtain a channel state information report, where the channel state information report includes M channel state information sets, where M is an integer greater than or equal to 1 and less than or equal to N, and each channel state information set includes a reference signal resource indication and a reference signal receiving power; the terminal sends the channel state information report to the network device, and the network device determines appropriate analog precoding information based on the channel state information report to perform analog precoding on the data to be transmitted.

[0090] To support the hybrid precoding method described above in existing communication systems, the base station may be configured with multiple reference signals, and each reference signal may have multiple antenna ports. The purpose of multiple reference signals is to implement different analog precoding methods, while multiple antenna ports allow the terminal to measure and feedback the most appropriate digital precoding information, thereby implementing hybrid precoding. In order to feedback the optimal digital precoding under different analog precoding conditions, the network device needs to obtain the channel state information report corresponding to the hybrid precoding. The terminal may need to feedback multiple channel state information sets. Therefore, how the terminal device feedbacks the channel state information report to the network device is a problem that needs to be solved.

[0091] In related technologies, if a hybrid precoding method is to be supported in a communication system, the terminal device needs to feed back a channel state information report corresponding to digital precoding to the network device, and feed back a channel state information report corresponding to analog precoding to the network device in the above-mentioned manner. That is, the terminal feeds back two channel state information reports to the network device (i.e., a channel state information report corresponding to digital precoding and a channel state information report corresponding to analog precoding). The network device can determine the appropriate digital precoding based on the channel state information report corresponding to the digital precoding, and determine the appropriate analog precoding based on the channel state information report corresponding to the analog precoding, thereby determining the appropriate hybrid precoding information. This will cause the network device to have a relatively large delay in determining the appropriate hybrid precoding information.

[0092] Based on this, an embodiment of the present application provides a communication method, in which a terminal device receives N reference signals transmitted by a network device; the terminal device performs channel measurement on the N reference signals to obtain N channel state information; and the terminal device transmits a channel state information report to the network device, where the channel state information report includes M reference signal resource indicators and channel state information associated with each reference signal resource indicator. In this way, the terminal device can feedback the M reference signal resource indicators and the channel state information associated with each reference signal resource indicator in a channel state information report, allowing the network device to determine appropriate hybrid precoding information based on the channel state information report to perform hybrid precoding on the data to be transmitted.

[0093] Furthermore, since the reference signal resource indication included in the channel state information set can be used for analog precoding, and the precoding matrix indication in other channel state information associated with the reference signal resource indication can be used for digital precoding, the terminal device feeds back both the channel state information corresponding to the digital precoding and the reference signal resource indication corresponding to the analog precoding in the channel state information report, so that the network device can determine the appropriate hybrid precoding information based on a channel state information report fed back by the terminal device, thereby reducing the delay of the network device in determining the appropriate hybrid precoding information.

[0094] It's understandable that in communications systems, digital precoding is primarily applicable to low-frequency signals, such as those below 6 GHz. Analog precoding is primarily applicable to high-frequency signals, such as those above 28 GHz. Hybrid precoding can be used for signals in specific frequency bands between 6 GHz and 28 GHz.

[0095] The following combination Figures 3 and 4 The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0096] For example, Figure 3 This is a flow chart of a communication method provided in an embodiment of the present application. Figure 3 As shown, the communication method may specifically include the following steps:

[0097] S301: A network device sends N reference signals to a terminal device. Correspondingly, the terminal device receives the N reference signals from the network device.

[0098] The N reference signals sent by the network device may be N downlink reference signals, where N is an integer greater than 1. The N reference signals are used for channel measurement for channel state information reporting.

[0099] It should be noted that the network device may send the N reference signals periodically, semi-persistently, or dynamically and non-periodically, and this application does not limit this.

[0100] S302: The terminal device performs channel measurement on N reference signals to obtain a channel state information report.

[0101] After receiving N reference signals from the network device, the terminal device can perform channel measurement on the N reference signals to obtain a channel state information report. That is, the channel state information report is obtained by the terminal device performing channel measurement on the N reference signals.

[0102] In some implementations, the network device may send configuration information to the terminal device, where the configuration information is used to configure information to be reported in the channel state information report. The terminal device may perform channel measurement on N reference signals based on the configuration information to obtain a channel state information report.

[0103] In some implementations, the terminal device may first measure the reference signal received power of each of N reference signals, and then determine the reference signals corresponding to the top M reference signal received powers from the N reference signal received powers in descending order, and measure channel state information for each of the M reference signals to obtain a channel state information report. Where M is an integer greater than or equal to 1 and less than or equal to N.

[0104] S303: The terminal device sends a channel state information report to the network device. Correspondingly, the network device receives the channel state information report from the terminal device.

[0105] A terminal device can send a channel state information report (CSI) to a network device. This CSI report includes multiple CSI sets. Each CSI set includes a reference signal resource indicator (RSRI) and other CSI associated with the RSRI. The network device can determine appropriate hybrid precoding information based on the CSI report to perform hybrid precoding on the data to be transmitted.

[0106] When the terminal device feeds back a channel state information report, the channel state information report may include a first part report and a second part report. The first part report and the second part report may feed back different channel state information. The first part report is usually used to feed back some broadband information, and the second part report is usually used to feed back some remaining broadband information and sub-band information. The first part report and the second part report are channel coded separately, and the first part report and the second part report have their own information check bits. After the network device is configured with parameters related to the channel state information report, the feedback overhead used by the terminal device to feed back the first part report is fixed. After receiving the first part report, the network device can obtain the feedback overhead of the second part report by parsing the first part report, that is, the overhead used by the terminal device to feed back the second part report is determined by the first part report, and the first part report can be used to indicate the feedback overhead of the second part report.

[0107] The wideband-related channel state information may include at least one of a wideband channel quality indicator and a wideband precoding matrix indicator. The wideband channel quality indicator or the wideband precoding matrix indicator corresponds to the channel measurement result within the entire frequency domain range of the reference signal. The subband-related channel state information may include at least one of a subband channel quality indicator and a subband precoding matrix indicator. The subband channel quality indicator or the subband precoding matrix indicator corresponds to the channel measurement result of a frequency domain subband within the entire frequency domain range of the reference signal. The entire frequency domain range of the reference signal can be divided into multiple frequency domain subbands, so the subband-related channel state information may include multiple subband channel quality indicators or subband precoding matrix indicators, each subband channel quality indicator or subband precoding matrix indicator corresponding to a frequency domain subband.

[0108] The following describes in detail the channel state information report sent by the terminal device to the network device for different scenarios.

[0109] In the first scenario, the network device may be configured with N reference signal resources for channel state information reporting. These N reference signal resources may use different analog precoding information. The terminal device reports a portion of each of the M channel state information sets in the first partial report. Each portion of the channel state information set includes a reference signal resource indicator and some channel state information associated with this reference signal resource indicator (such as digital precoding information). This helps the network device select the appropriate hybrid precoding information for transmission.

[0110] In the first scenario, the first part of the channel state information report specifically includes M reference signal resource indicators and some channel state information associated with each of the M reference signal resource indicators. The some channel state information associated with each reference signal resource indicator includes: at least one of a rank indicator, a wideband channel quality indicator of the first transport block, and a subband channel quality indicator of the first transport block.

[0111] The M reference signal resource indicators in the first part of the report are arranged in a first order, and the arrangement order of the channel state information associated with each reference signal resource indicator in the first part of the report corresponds one-to-one to the arrangement order of each reference signal resource indicator. The embodiment of the present application does not limit the method for determining the first order.

[0112] For example, the first part of the report includes two reference signal resource indicators. The order of sorting the reference signal resource indicators in the first part of the report and the channel state information associated with the reference signal resource indicators can be shown in Table 1 below.

[0113] Table 1

[0114] First reference signal resource indicator The first reference signal resource indicates the associated channel state information Second reference signal resource indication The second reference signal resource indicates the associated channel state information

[0115] For another example, the first part of the report includes two reference signal resource indicators. The order of sorting the reference signal resource indicators in the first part of the report and the channel state information associated with the reference signal resource indicators may be as shown in Table 2 below.

[0116] Table 2

[0117] First reference signal resource indicator Second reference signal resource indication The first reference signal resource indicates the associated channel state information The second reference signal resource indicates the associated channel state information

[0118] There are many ways to indicate M reference signal resource indications in the first part of the report. In one implementation, M reference signal resource indications can be jointly indicated in one field (first field), that is, the first part of the report also includes a first field, and the first field is used to indicate M reference signal resource indications. The network device is configured with a total of N reference signal resources, and the terminal device needs to feedback M (M≤N) reference signal resource indications. Then there are a total of P ways to select M reference signal resources from N reference signal resources, and the terminal device selects one way from them to feedback to the network device. Furthermore, the feedback overhead of the first field is For example, if the network device is configured with 4 reference signal resources and the terminal device needs to feedback 2 of the reference signal resource indications, there are 6 ways to select 2 reference signal resources from the 4 reference signal resources. The feedback overhead of the first field is bit.

[0119] In another implementation, a bit sequence may be used to indicate M reference signal resource indications, that is, the first part of the report also includes a sequence consisting of N bits, and the states of M bits out of the N bits are used to indicate the M reference signal resource indications. If the network device is configured with a total of N reference signal resources, the terminal device will feedback a sequence in the first part of the report. The sequence length is N bits, and one bit corresponds to one reference signal resource. If the state of the bit corresponding to a reference signal resource is 1, it means that the terminal device indicates a reference signal resource corresponding to the bit. For example, if the network device is configured with 4 reference signal resources, and the bit sequence fed back by the terminal device is 1010, the sequence indicates that the first reference signal resource and the third reference signal resource are indicated in the first part of the report.

[0120] In the first scenario, the second portion of the channel state information report includes another portion of each channel state information set, namely, the remaining channel state information associated with each reference signal resource indication in the M reference signal resource indications. Further, the second portion of the report includes the first information, the second information, and the third information.

[0121] The first information feeds back some remaining wideband information. The first information includes the first portion of the remaining channel state information associated with each of the M reference signal resource indicators. The first portion of the remaining channel state information includes at least one of the following: a wideband channel quality indicator for the second transport block, and a wideband precoding matrix indicator. The first information includes at least one of the following: a wideband channel quality indicator for the second transport block associated with each of the M reference signal resource indicators, and a wideband precoding matrix indicator associated with each of the M reference signal resource indicators.

[0122] The second information feeds back some even subband information. The second information includes the second portion of the remaining channel state information associated with each of the M reference signal resource indicators. The second portion of the remaining channel state information includes at least one of the following: a channel quality indicator for the even subbands of the second transport block, and a precoding matrix indicator for the even subbands. The second information includes at least one of the following: a channel quality indicator for the even subbands of the second transport block associated with each of the M reference signal resource indicators, and a precoding matrix indicator for the even subbands associated with each of the M reference signal resource indicators.

[0123] The third information feeds back some odd subband information. The third information includes the third portion of the remaining channel state information associated with each of the M reference signal resource indicators. The third portion of the remaining channel state information includes at least one of the following: an odd subband channel quality indicator for the second transport block, and an odd subband precoding matrix indicator. The third information includes at least one of the following: a channel quality indicator for the odd subband of the second transport block associated with each of the M reference signal resource indicators, and a precoding matrix indicator for the odd subband associated with each of the M reference signal resource indicators.

[0124] In the first part of the channel state information report, the M reference signal resource indicators are arranged in a first order. In the second part of the channel state information report, the first information has a higher priority than the second information and a higher priority than the third information. Furthermore, the arrangement order of the first part of the remaining channel state information associated with each reference signal resource indicator corresponds one-to-one to the arrangement order of each reference signal resource indicator in the first part of the report. The arrangement order of the second part of the remaining channel state information associated with each reference signal resource indicator corresponds one-to-one to the arrangement order of each reference signal resource indicator in the first part of the report. The arrangement order of the third part of the remaining channel state information associated with each reference signal resource indicator corresponds one-to-one to the arrangement order of each reference signal resource indicator in the first part of the report.

[0125] For example, if the first part of the report includes two reference signal resource indications, the first reference signal resource indication has a higher priority than the second reference signal resource indication. Accordingly, the first part of the remaining channel state information associated with the first reference signal resource indication has the highest sorting priority, the second part of the remaining channel state information associated with the first reference signal resource indication has the highest sorting priority, and the third part of the remaining channel state information associated with the first reference signal resource indication has the highest sorting priority. The sorting order of the channel state information in the channel state information report is shown in Table 3 below.

[0126] Table 3

[0127] First reference signal resource indicator Second reference signal resource indication The first reference signal resource indicates the associated channel state information The second reference signal resource indicates the associated channel state information The first reference signal resource indicates the first part of the remaining channel state information associated with it The second reference signal resource indicates the first part of the remaining channel state information associated The second part of the remaining channel state information associated with the first reference signal resource indication The second reference signal resource indicates the second part of the associated remaining channel state information The third part of the remaining channel state information associated with the first reference signal resource indication The third part of the remaining channel state information associated with the second reference signal resource indication

[0128] By arranging the channel state information with a higher priority at the front, when the network device decodes the channel state information report, the bit error rate of the channel state information with a higher priority is lower.

[0129] When the terminal device is feeding back channel state information, if the physical resources used to feed back the channel state information report are insufficient, the terminal device may discard some of the contents of the second part of the report in descending order of priority. Among them, the third information in the second part of the report will be discarded first, the second information in the second part of the report will be discarded later, and the first information in the second part of the report will be discarded last.

[0130] The second scenario: the terminal device feeds back a part of the content of one channel state information set among multiple channel state information sets in the first part report. The terminal device can indicate the number K of reference signal resource indications included in the second part report in the first part report, which is conducive to dynamically controlling the overhead of the feedback channel state information report.

[0131] In the second scenario, the first part of the channel state information report includes a first reference signal resource indication and some channel state information associated with the first reference signal resource indication. This channel state information may include at least one of a rank indication, a wideband channel quality indication of the first transport block, and a subband channel quality indication of the first transport block. The first reference signal resource indication is one of M reference signal resource indications, for example, it may be the first reference signal resource indication after sorting the M reference signal resource indications, with the first reference signal resource indication having the highest priority. The sorting method may be to sort in descending order of reference signal received power, with the first reference signal resource indication having the highest reference signal received power.

[0132] The first part of the channel state information report may also include a second field, which indicates the number K of reference signal resource indicators included in the second part of the report, where K ≤ M-1. That is, the additional K reference signal resource indicators and their associated channel state information are fed back in the second part of the report. The K reference signal resource indicators may be the first K reference signal resource indicators, excluding the first reference signal resource indicator, of the M reference signal resource indicators, sorted from highest to lowest reference signal received power. In one implementation, if K = M-1, the second field may not be included in the first part of the channel state information report.

[0133] In one implementation, for rank indication, the rank indication associated with each of the K reference signal resource indications is the same as the rank indication associated with the first reference signal resource indication in the first part of the report, and the rank indications associated with the K reference signal resource indications may not be fed back. In this way, after decoding the first part of the report, the network device can know the feedback overhead of the second part of the report. In another implementation, the first part of the report may further include a fifth field for indicating the rank indication associated with each of the K reference signal resource indications. For example, the fifth field includes M - 1 fields, and each field can be used to indicate a rank indication. Then, the first K fields in the M - 1 fields are respectively used to indicate the rank indication associated with each of the K reference signal resource indications. If K < M - 1, the remaining fields can be filled with a preset value, such as 0.

[0134] In another implementation, the first part of the report may further include a sixth field for indicating the rank indication associated with each of the K + 1 reference signal resource indications. For example, the sixth field includes M fields, and each field can be used to indicate a rank indication. Among them, the first field in the M fields is used to indicate the rank indication associated with the first reference signal resource indication. The second to the (K + 1)th fields in the M fields are respectively used to indicate the rank indication associated with each of the K reference signal resource indications. If K + 1 < M, the remaining fields can be filled with a preset value, such as 0.

[0135] In the second scenario, the second part of the channel state information report includes another part of the content of one channel state information set among multiple channel state information sets, and the remaining channel state information sets among the multiple channel state information sets, that is, the remaining channel state information associated with the first reference signal resource indication in the second part of the report, the K reference signal resource indications, and the channel state information associated with each of the K reference signal resource indications. Further, the second part of the report includes first information, second information, and third information.

[0136] The first information includes the first part of the remaining channel state information associated with the first reference signal resource indication, the K reference signal resource indications, some of the channel state information associated with each of the K reference signal resource indications, and the first part of the remaining channel state information.

[0137] Specifically, the first part of the remaining channel state information associated with the first reference signal resource indication includes at least one of the wideband channel quality indication of the second transport block associated with the first reference signal resource indication and the wideband precoding matrix indication associated with the first reference signal resource indication.

[0138] The channel state information associated with each of the K reference signal resource indications includes at least one of a subband channel quality indication of a first transport block and a subband channel quality indication of a first transport block.

[0139] The first part of the remaining channel state information associated with each reference signal resource indication in the K reference signal resource indications includes at least one of a wideband precoding matrix indication and a wideband channel quality indication of the second transport block.

[0140] The second information feeds back some even subband information, including the first reference signal resource indicator and the second portion of the remaining channel state information associated with the K reference signal resource indicators. The second information includes at least one of a channel quality indicator for the even subbands of the second transport block associated with the first reference signal resource indicator and a precoding matrix indicator for the even subbands associated with the first reference signal resource indicator, and at least one of a channel quality indicator for the even subbands of the second transport block associated with each of the K reference signal resource indicators and a precoding matrix indicator associated with each of the K reference signal resource indicators.

[0141] The third information feeds back some odd subband information, and the second information includes the first reference signal resource indicator and the third portion of the remaining channel state information associated with the K reference signal resource indicators. The third information includes at least one of a channel quality indicator for the odd subbands of the second transport block associated with the first reference signal resource indicator and a precoding matrix indicator for the odd subbands associated with the first reference signal resource indicator, and at least one of a channel quality indicator for the odd subbands of the second transport block associated with each of the K reference signal resource indicators and a precoding matrix indicator associated with each of the K reference signal resource indicators.

[0142] In the second part of the report, the first reference signal resource indication has the highest sorting priority, and the arrangement order of the channel state information associated with each reference signal resource indication in the subsequent K reference signal resource indications corresponds one-to-one to the arrangement order of the K reference signal resource indications.

[0143] In the first scenario or the second scenario described above, the channel state information report may further include a reference signal received power associated with the reference signal resource indication.

[0144] The network device may instruct the terminal device to feedback the reference signal received power RSRP in the channel state report. For example, Figure 4 This is a flow chart of another communication method provided in an embodiment of the present application. Figure 4 As shown, the communication method may specifically include the following steps:

[0145] S401: A network device sends N reference signals to a terminal device. Correspondingly, the terminal device receives the N reference signals from the network device.

[0146] This step is similar to the implementation of the above step S301, and will not be described again here to avoid repetition.

[0147] S402: The network device sends configuration information to the terminal device. Correspondingly, the terminal device receives the configuration information from the network device.

[0148] The configuration information is used to configure the terminal device to feedback the reference signal received power associated with the reference signal resource indication in the channel state information report.

[0149] S403: The terminal device performs channel measurement on N reference signals based on the configuration information to obtain a channel state information report.

[0150] After receiving N reference signals and configuration information from the network device, the terminal may perform channel measurement on the N reference signals based on the configuration information to obtain a channel state information report.

[0151] S404: The terminal device sends a channel state information report to the network device. Correspondingly, the network device receives the channel state information report from the terminal device.

[0152] The terminal device can send a channel state information report to the network device. This channel state information report includes multiple channel state information sets. Each channel state information set includes a reference signal resource indicator and other channel state information associated with the reference signal resource indicator (including reference signal received power). The network device can determine appropriate hybrid precoding information based on the channel state information report to perform hybrid precoding on the data to be transmitted.

[0153] In the first implementation, the configuration information is used to configure the terminal device to report the reference signal received power associated with each reference signal resource indication in the channel state information report. The reference signal received power is typically wideband information, and the first part of the report can be used to report partial wideband channel state information. The terminal device reports the reference signal received power associated with each reference signal resource indication in the first part of the report.

[0154] In the first scenario described above, the first part of the channel state information report includes M reference signal resource indicators and some channel state information associated with each of the M reference signal resource indicators. The channel state information associated with each reference signal resource indicator includes: a rank indicator, at least one of a wideband channel quality indicator of the first transport block, a subband channel quality indicator of the first transport block, and a reference signal received power.

[0155] The sorting order of the reference signal received power associated with each reference signal resource indication in the first part of the report corresponds one-to-one to the sorting order of each reference signal resource indication.

[0156] For example, the first part of the report includes two reference signal resource indicators. The order of sorting the reference signal resource indicators in the first part of the report and the channel state information associated with the reference signal resource indicators can be shown in Table 4 below.

[0157] Table 4

[0158] First reference signal resource indicator The first reference signal resource indicates the associated channel state information (reference signal received power) Second reference signal resource indication The second reference signal resource indicates the associated channel state information (reference signal received power)

[0159] For another example, the first part of the report includes two reference signal resource indicators. The reference signal resource indicators in the first part of the report and the channel state information associated with the reference signal resource indicators can be sorted in the order shown in Table 5 below.

[0160] Table 5

[0161] First reference signal resource indicator Second reference signal resource indication The first reference signal resource indicates the associated channel state information (reference signal received power) The second reference signal resource indicates the associated channel state information (reference signal received power)

[0162] In the first scenario described above, the second part of the channel state information report includes the remaining channel state information associated with each of the M reference signal resource indicators. Further, the second part of the report includes the first information, the second information, and the third information.

[0163] The first information feeds back some remaining wideband information. The first information includes a first portion of remaining channel state information associated with each of the M reference signal resource indicators. The first portion of the remaining channel state information includes at least one of the following: a wideband channel quality indicator for the second transport block and a wideband precoding matrix indicator.

[0164] The second information feeds back some even subband information. The second information includes the second portion of the remaining channel state information associated with each of the M reference signal resource indicators. The second portion of the remaining channel state information includes at least one of the following: a precoding matrix indicator for the even subband, and a channel quality indicator for the even subband of the second transport block.

[0165] The third information feeds back some odd subband information. The third information includes the third portion of the remaining channel state information associated with each of the M reference signal resource indicators. The third portion of the remaining channel state information includes at least one of the following: an odd subband precoding matrix indicator and an odd subband channel quality indicator for the second transport block.

[0166] In a second implementation, the configuration information is used to configure the terminal device to feedback the reference signal received power associated with each reference signal resource indication in the channel state information report. The terminal device feedbacks the reference signal received power associated with each reference signal resource indication in the first information of the second part of the report.

[0167] Reference signal received power is typically broadband information, and the second part of the report can also be used to feedback the remaining broadband information. Because the first part of the report feedbacks M reference signal resource indicators, to some extent, it implicitly indicates the relative magnitude of the reference signal received power obtained based on different reference signal resources. For example, in the first part of the report, the reference signal resource indicators are sorted by the magnitude of the reference signal power. In this case, the reference signal power corresponding to the first reference signal resource indicator in the first part of the report is greater than the reference signal power corresponding to the second reference signal resource indicator. Therefore, the priority of the reference signal received power can be lower than that of the first part of the report, that is, the reference signal received power can be fed back in the second part of the report.

[0168] In the first scenario described above, the first part of the channel state information report includes M reference signal resource indicators and some channel state information associated with each of the M reference signal resource indicators. The channel state information associated with each reference signal resource indicator includes at least one of a rank indicator, a wideband channel quality indicator of the first transport block, and a subband channel quality indicator of the first transport block.

[0169] The second part of the channel state information report includes the remaining channel state information associated with each of the M reference signal resource indicators. Furthermore, the second part of the report includes first information, second information, and third information. The first information provides feedback of some remaining wideband information. The first information includes the first part of the remaining channel state information associated with each of the M reference signal resource indicators. The first part of the remaining channel state information includes: a wideband channel quality indicator for the second transport block, at least one of a wideband precoding matrix indicator, and a reference signal received power.

[0170] The second information feeds back some even subband information. The second information includes the second portion of the remaining channel state information associated with each of the M reference signal resource indicators. The second portion of the remaining channel state information includes at least one of the following: a precoding matrix indicator for the even subband, and a channel quality indicator for the even subband of the second transport block.

[0171] The third information feeds back some odd subband information. The third information includes the third portion of the remaining channel state information associated with each of the M reference signal resource indicators. The third portion of the remaining channel state information includes at least one of the following: a precoding matrix indicator for the odd subband, and a channel quality indicator for the odd subband of the second transport block.

[0172] In the second implementation, the order in which the reference signal received power associated with each reference signal resource indication is ranked in the first information of the second partial report corresponds one-to-one to the order in which each reference signal resource indication is ranked. For example, in the first scenario, the first reference signal resource indication in the first partial report has the highest priority, and the reference signal received power associated with the first reference signal resource indication has the highest ranking priority.

[0173] In a third implementation, the configuration information is used to configure the terminal device to provide feedback, in a channel state information report, of the reference signal received powers associated with some of the M reference signal resource indications. The terminal device provides feedback, in a first partial report, of the reference signal received powers associated with Z of the M reference signal resource indications, where Z ≤ M. In this implementation, the reference signal received powers of some reference signal resource indications may not be provided in the channel state information report.

[0174] For determining the number of reference signal received powers, embodiments of the present application provide two implementations. In one implementation, the configuration information is specifically used to configure the terminal device to report a reference signal received power greater than or equal to a first threshold in a channel state information report. That is, the terminal device does not need to report a reference signal received power less than the first threshold in a channel state information report. The first threshold can be configured by the network device.

[0175] After the terminal device measures the reference signal received power of each of the N reference signals and determines the top M reference signal received powers from the N reference signal received powers in descending order, if the reference signal received power of one of the top M reference signal received powers is less than the first threshold, then the reference signal received power does not need to be fed back in the channel state information report.

[0176] In another implementation, the configuration information is specifically used to configure the terminal device to not report a reference signal received power less than the power difference in the channel state information report. That is, the terminal device reports a reference signal received power greater than or equal to the power difference in the channel state information report. The power difference is the difference between the maximum of the reference signal received powers associated with the M reference signal resource indicators and a second threshold. The second threshold can be configured by the network device.

[0177] After measuring the reference signal received power of each of the N reference signals and determining the top M reference signal received powers from the N reference signal received powers in descending order, if the reference signal received power of any one of the M top reference signal received powers is less than the power difference obtained by subtracting the second threshold from the maximum value of the M top reference signal received powers, then the reference signal received power does not need to be fed back in the channel state information report. After screening the reference signal received powers, it is determined that the top Z reference signal received powers of the M reference signal received powers meet the condition.

[0178] In the first scenario described above, the first part of the channel state information report includes M reference signal resource indicators, some channel state information associated with each of the M reference signal resource indicators, and reference signal received powers associated with the first Z reference signal resource indicators of the M reference signal resource indicators. The some channel state information associated with each reference signal resource indicator includes at least one of a rank indicator, a wideband channel quality indicator of the first transport block, and a subband channel quality indicator of the first transport block.

[0179] The second part of the channel state information report includes the remaining channel state information associated with each of the M reference signal resource indicators. Furthermore, the second part of the report includes first information, second information, and third information. The first information reports back some remaining wideband information. The first information includes the first part of the remaining channel state information associated with each of the M reference signal resource indicators. The first part of the remaining channel state information includes at least one of the following: a wideband channel quality indicator for the second transport block and a wideband precoding matrix indicator. The second information reports back some even subband information. The second information includes the second part of the remaining channel state information associated with each of the M reference signal resource indicators. The second part of the remaining channel state information includes at least one of the following: a precoding matrix indicator for the even subband and a channel quality indicator for the even subband of the second transport block. The third information reports back some odd subband information. The third information includes the third part of the remaining channel state information associated with each of the M reference signal resource indicators. The third part of the remaining channel state information includes at least one of the following: an odd subband precoding matrix indication, and an odd subband channel quality indication of the second transport block.

[0180] In a fourth implementation, the configuration information is used to configure the terminal device to provide feedback, in a channel state information report, of reference signal received powers associated with some of the M reference signal resource indicators. The terminal device provides feedback, in a second partial report, of reference signal received powers associated with Z of the M reference signal resource indicators, where Z ≤ M.

[0181] In the first scenario described above, the first part of the channel state information report includes M reference signal resource indicators and some channel state information associated with each of the M reference signal resource indicators. The some channel state information associated with each reference signal resource indicator includes at least one of a rank indicator, a wideband channel quality indicator of the first transport block, and a subband channel quality indicator of the first transport block.

[0182] Furthermore, the first part of the channel state information report includes a field, which is used to indicate that the second part of the channel state information report includes Z reference signal resource indications associated with the reference signal received power.

[0183] The second part of the channel state information report includes the remaining channel state information associated with each of the M reference signal resource indicators. Furthermore, the second part of the report includes the first information, the second information, and the third information. The first information feeds back some remaining broadband information. The first information includes the first part of the remaining channel state information associated with each of the M reference signal resource indicators, and the reference signal received power associated with the first Z reference signal resource indicators in the M reference signal resource indicators. The first part of the remaining channel state information includes at least one of the following: a broadband channel quality indicator of the second transport block, and a broadband precoding matrix indicator.

[0184] The second information feeds back some even subband information. The second information includes the second portion of the remaining channel state information associated with each of the M reference signal resource indicators. The second portion of the remaining channel state information includes at least one of the following: a channel quality indicator for the even subbands of the second transport block, and a precoding matrix indicator for the even subbands. The third information feeds back some odd subband information. The third information includes the third portion of the remaining channel state information associated with each of the M reference signal resource indicators. The third portion of the remaining channel state information includes at least one of the following: a channel quality indicator for the odd subbands of the second transport block, and a precoding matrix indicator for the odd subbands.

[0185] In the first or second scenario described above, the terminal device can choose whether to measure the reference signal received power. The first part of the channel state information report may also include a third field, which is used to indicate whether the second part of the report includes the reference signal received power associated with the reference signal resource indication. This allows the terminal to flexibly choose whether to measure the reference signal received power, which helps to reduce the terminal's computational complexity.

[0186] If the third field indicates that the second part of the report includes reference signal resource indications associated with reference signal received powers, the terminal device may feed back reference signal received powers associated with M reference signal resource indications in the first information of the second part of the report.

[0187] Furthermore, when the third field indicates that the second part report includes a reference signal resource indication associated with the reference signal receiving power, the first part report of the channel state information report may also include a fourth field, and the fourth field is used to indicate the number of reference signal receiving powers included in the second part report.

[0188] Specifically, the fourth field may indicate that the second part of the channel state information report includes reference signal received powers associated with K reference signal resource indications, and the terminal device feeds back the reference signal received powers associated with the K reference signal resource indications in the first information of the second part of the report. The K reference signal received powers correspond to the first K reference signal resource indications with higher priority in the first part of the report.

[0189] If the terminal device chooses to measure the reference signal received power, combined with the second scenario mentioned above, the first part of the channel state information report includes the reference signal received power associated with the first reference signal resource indication, the first reference signal resource indication, and some channel state information associated with the first reference signal resource indication. These channel state information may include: a rank indication, a wideband channel quality indication of the first transport block, and at least one of a subband channel quality indication of the first transport block.

[0190] The second portion of the channel state information report includes the remaining channel state information associated with the first reference signal resource indication, the K reference signal resource indications, and the channel state information associated with each of the K reference signal resource indications. Further, the second portion of the report includes the first information, the second information, and the third information.

[0191] The first information includes the first part of the remaining channel state information associated with the first reference signal resource indication, K reference signal resource indications, some channel state information associated with each of the K reference signal resource indications, and the first part of the remaining channel state information.

[0192] Specifically, the first part of the remaining channel state information associated with the first reference signal resource indication includes: at least one of: a broadband channel quality indication of a second transmission block associated with the first reference signal resource indication and a broadband precoding matrix indication associated with the first reference signal resource indication.

[0193] The channel state information associated with each of the K reference signal resource indicators includes: a subband channel quality indicator of a first transport block, at least one of a subband channel quality indicator of a first transport block, and a reference signal received power. The first portion of the remaining channel state information associated with each of the K reference signal resource indicators includes: at least one of a wideband precoding matrix indicator and a wideband channel quality indicator of a second transport block.

[0194] The second information feeds back information about the even subbands of the second transport block, including the first reference signal resource indicator and the second portion of the remaining channel state information associated with the K reference signal resource indicators. The second information includes at least one of a channel quality indicator for the even subbands of the second transport block associated with the first reference signal resource indicator, a precoding matrix indicator for the even subbands associated with the first reference signal resource indicator, and at least one of a channel quality indicator for the even subbands of the second transport block associated with each of the K reference signal resource indicators, and a channel quality indicator for the even subbands associated with each of the K reference signal resource indicators. The third information feeds back information about the odd subbands of the second transport block, including the first reference signal resource indicator and the third portion of the remaining channel state information associated with the K reference signal resource indicators. The third information includes: at least one of a channel quality indication of an odd subband of a second transport block associated with the first reference signal resource indication, and a precoding matrix indication of an odd subband associated with the first reference signal resource indication; and at least one of a channel quality indication of an odd subband of a second transport block associated with each of the K reference signal resource indications, and a channel quality indication of an odd subband associated with each of the K reference signal resource indications.

[0195] In some embodiments, when the channel state information report includes the reference signal received power, the reference signal received power corresponding to the first reference signal resource indication is an absolute value; the reference signal received power corresponding to other reference signal resource indications is a relative value of the reference signal received power corresponding to the first reference signal resource indication.

[0196] Therefore, the reference signal received power corresponding to the first reference signal resource indication is reported as an absolute value, which is the actual measurement value after channel measurement. The reference signal received power corresponding to other reference signal resource indications is reported as a relative value calculated relative to the reference signal received power corresponding to the first reference signal resource indication. The relative value can also be called a differential value, that is, the value of the reference signal received power corresponding to the other reference signal resource indication when reported is the difference between the absolute value of the reference signal received power corresponding to the other reference signal resource indication and the absolute value of the reference signal received power corresponding to the first reference signal resource indication. This helps reduce feedback overhead.

[0197] In summary, in the embodiment of the present application, the channel state information report fed back by the terminal device to the network device includes M reference signal resource indications and other channel state information associated with each reference signal resource indication. If the channel state information reports fed back by multiple terminals to the network device include only one channel state information set, such as the channel state information reports fed back by the first terminal and the second terminal to the network device include only one channel state information set, the analog precoding information determined by the network device based on the channel state information set fed back by the first terminal and the second terminal may be the same, thus causing the network device to be unable to generate two analog beams at the same time, and causing the network device to be unable to support sending data to the first terminal and the second terminal at the same time.

[0198] Therefore, the channel state information report fed back by the terminal device to the network device in the embodiment of the present application includes M channel state information sets. For example, the channel state information reports fed back by the first terminal and the second terminal to the network device both include M channel state information sets. Based on the channel state information reports fed back by the first terminal and the second terminal, the network device can determine that the beams sent to the first terminal and the second terminal at the same time can use the same analog precoding and different digital precoding. Then, the network device can generate two beams at the same time, so that the network device can support sending data to the first terminal and the second terminal at the same time.

[0199] It should be understood that in the various embodiments of the present application, unless otherwise specified and there is no logical conflict, the terms and / or descriptions between different embodiments may be consistent and may be referenced to each other, and the technical features in different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0200] Combined with the above Figures 1 to 4 , the communication method provided in the embodiment of the present application is explained, and the communication device for executing the above communication method provided in the embodiment of the present application is described below.

[0201] See also Figure 5 , Figure 5 This is a schematic diagram of the communication device provided by this application. Figure 5 As shown, the communication device 500 may include a communication unit 510 and, optionally, a processing unit 520. The communication unit 510 may implement corresponding communication functions, which may be internal communication within the communication device 500 or communication between the communication device 500 and other devices; the processing unit 520 may implement corresponding processing functions. The communication unit 510 may also be referred to as a communication interface or a transceiver unit. Optionally, the communication device 500 may also include a storage unit, which may be used to store instructions and / or data. The processing unit 520 may read the instructions and / or data in the storage unit, so that the communication device 500 implements the aforementioned method embodiments.

[0202] In one possible design, the communication device 500 may be the terminal device in the above method embodiment, or may be a module or chip applied to the terminal device. The communication device 500 may be used to execute the steps or processes executed by the terminal device in the above embodiments.

[0203] Specifically, the communication unit 510 is used to: receive N reference signals sent by the network device, where N is an integer greater than 1; and send a channel state information report to the network device, where the channel state information report includes multiple channel state information sets, each channel state information set includes a reference signal resource indication and channel state information associated with the reference signal resource indication, wherein the number of channel state information sets is less than or equal to N.

[0204] In one possible design, the communication device 500 may be the network device in the above method embodiment, or may be a module or chip applied to the network device. The communication device 500 may be used to execute the steps or processes executed by the network device in the above embodiments.

[0205] Specifically, the communication unit 510 is used to: send N reference signals to the terminal device, where N is an integer greater than 1; receive a channel state information report sent by the terminal device, where the channel state information report includes multiple channel state information sets, each channel state information set includes a reference signal resource indication and channel state information associated with the reference signal resource indication, and the channel state information report is obtained by the terminal device performing channel measurement on the N reference signals, wherein the number of channel state information sets is less than or equal to N.

[0206] Regarding the steps or processes executed by each unit in the communication device 500, please refer to the above method embodiment for details, which will not be described in detail here.

[0207] It should be understood that the "units" in the communication device 500 can be implemented by hardware, can be implemented by software, and can also be implemented by hardware executing the corresponding software implementation. For example, the "units" can refer to application specific integrated circuits (ASICs), electronic circuits, processors (such as shared processors, dedicated processors, or group processors, etc.) and memories for executing one or more software or firmware programs, combined logic circuits, and / or other suitable components that support the described functions. For another example, the communication unit 510 can be replaced by a transceiver transceiver circuit (for example, a receiving circuit and a transmitting circuit), and the processing unit 520 can be replaced by a processor or a processing circuit.

[0208] See also Figure 6 , Figure 66 is a schematic diagram of the structure of a communication device 600 applicable to an embodiment of the present application. The communication device 600 can be a communication device, or a chip, chip system, or processor that supports the communication device in implementing the above-mentioned method. The communication device can be a terminal device or a network device. The device can be used to implement the method described in the above-mentioned method embodiment. For details, please refer to the description of the above-mentioned method embodiment.

[0209] The communication device 600 includes one or more processors 601, which may also be referred to as processing units, and may implement certain control functions. The processor 601 may be a general-purpose processor or a dedicated processor.

[0210] In an optional design, the processor 601 may also store instructions and / or data, which can be executed by the processor 601 to enable the communication device 600 to perform the method described in the above method embodiment.

[0211] Optionally, the communication device 600 may include one or more memories 602, which may store instructions. These instructions can be executed on the processor 601, causing the communication device 600 to perform the method described in the above method embodiment. Optionally, the memory 602 may also store data. Optionally, the processor 601 may also store instructions and / or data. The processor 601 and memory 602 may be provided separately or integrated.

[0212] In another optional design, the communication device 600 may include a communication interface 603 for implementing receiving and transmitting functions. For example, the communication interface 603 may be a transceiver circuit, an interface, an interface circuit, or a transceiver. The transceiver circuit, interface, interface circuit, or transceiver for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, interface circuit, or transceiver may be used for reading and writing code / data, or the transceiver circuit, interface, interface circuit, or transceiver may be used for transmitting or delivering signals.

[0213] Those skilled in the art will understand that for ease of explanation, Figure 6 Only one memory and processor are shown. In an actual device, multiple processors and memories may exist. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiments of the present application.

[0214] It should be understood that, in one possible design, each step in the method embodiment provided in the present application can be completed by an integrated logic circuit of the hardware in the processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

[0215] It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit in the processor or the software instruction.

[0216] In the embodiment of the present application, the processor may be a CPU, and the processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiment of the present application may be directly embodied as being executed by a hardware decoding processor, or may be executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium mature in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware.

[0217] It should be understood that in the embodiments of the present application, the memory may include a read-only memory and a random access memory, and provide instructions and data to the processor. The memory may also include a non-volatile random access memory. The memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0218] An embodiment of the present application provides a communication network, including at least one network device and multiple terminal devices, wherein the network device is used to execute the steps executed by the network device in the method embodiment, and the terminal device is used to execute the steps executed by the terminal device in the method embodiment.

[0219] An embodiment of the present application provides a computer storage medium, which stores a computer program (also referred to as code or instruction). When the computer program is run on a computer, the computer executes the method of the embodiment of the present application.

[0220] An embodiment of the present application provides a computer program product containing instructions, which includes: a computer program (also referred to as code, or instructions), which enables a computer to execute the method of the embodiment of the present application when the computer program is executed.

[0221] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more available media sets. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium. The semiconductor medium can be a solid-state drive.

[0222] Those skilled 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 beyond the scope of this application.

[0223] Those skilled in the art will 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.

[0224] In the several embodiments provided in this 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 merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, 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.

[0225] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0226] 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.

[0227] 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, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method 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.

[0228] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: The method is applied to a terminal device, and the method includes: receiving N reference signals sent by a network device, where N is an integer greater than 1; Send a channel state information report to the network device, where the channel state information report includes multiple channel state information sets, each of the channel state information sets includes a reference signal resource indication and channel state information associated with the reference signal resource indication, wherein the number of channel state information sets is less than or equal to N.

2. The method according to claim 1, characterized in that The number of the channel state information sets is M, M≤N; the channel state information report includes a first part report, the first part report includes M reference signal resource indications, and at least one of a rank indication associated with each reference signal resource indication, a wideband channel quality indication of the first transmission block associated with each reference signal resource indication, and a subband channel quality indication of the first transmission block associated with each reference signal resource indication.

3. The method according to claim 2, characterized in that The channel state information report also includes a second part report, which includes at least one of a precoding matrix indication associated with each reference signal resource indication, a wideband channel quality indication of a second transport block associated with each reference signal resource indication, and a subband channel quality indication of a second transport block associated with each reference signal resource indication.

4. The method according to claim 2, characterized in that The arrangement order of the channel state information associated with each reference signal resource indication corresponds to the sorting order of the M reference signal resource indications in the first part of the report.

5. The method according to claim 2, characterized in that The first part report also includes a sequence consisting of N bits, and the states of M bits out of the N bits are used to indicate the M reference signal resource indications; or, the first part report also includes a first field, and the first field is used to indicate the M reference signal resource indications.

6. The method according to claim 1, characterized in that The channel state information report includes a first part report, which includes a first reference signal resource indication, and at least one of a rank indication associated with the first reference signal resource indication, a wideband channel quality indication of the first transport block associated with the first reference signal resource indication, and a subband channel quality indication of the first transport block associated with the first reference signal resource indication, and the first reference signal resource indication is one of multiple reference signal resource indications.

7. The method according to claim 6, characterized in that The first part of the channel state information further includes a second field, where the second field is used to indicate the number K of reference signal resource indications included in the second part of the report, where K≤M-1 and M≤N.

8. The method according to claim 7, characterized in that The rank indicator associated with each of the K reference signal resource indications is the same as the rank indicator associated with the first reference signal resource indication.

9. The method according to any one of claims 6 to 8, characterized in that The channel state information report also includes a second part report, which includes K reference signal resource indications, channel state information associated with the K reference signal resource indications, and remaining channel state information associated with the first reference signal resource indication, K≤M-1, M≤N.

10. The method according to any one of claims 6 to 8, characterized in that The channel state information report also includes a second part report, which includes first information, and the first information includes at least one of a wideband channel quality indication of the second transport block associated with the first reference signal resource indication and a wideband precoding matrix indication associated with the first reference signal resource indication, and at least one of a wideband precoding matrix indication associated with each of the K reference signal resource indications, a wideband channel quality indication of the first transport block, a subband channel quality indication of the first transport block, and a wideband channel quality indication of the second transport block.

11. The method according to claim 10, characterized in that The second part report also includes second information, which includes the precoding matrix indication of the even subband associated with the first reference signal resource indication and / or the channel quality indication of the even subband of the second transport block, and the precoding matrix indication of the even subband associated with each of the K reference signal resource indications and / or the channel quality indication of the even subband of the second transport block.

12. The method according to claim 10 or 11, characterized in that The second part report also includes third information, wherein the third information includes the precoding matrix indication of the odd subband associated with the first reference signal resource indication and / or the channel quality indication of the odd subband of the second transport block, and the precoding matrix indication of the odd subband associated with each of the K reference signal resource indications and / or the channel quality indication of the odd subband of the second transport block.

13. The method according to claim 2 or 6, characterized in that The method further comprises: Receive configuration information sent by the network device, where the configuration information is used to instruct the terminal device to feed back the reference signal received power associated with each reference signal resource indication in the channel state information report.

14. The method according to claim 13, characterized in that The first part of the report also includes a reference signal received power associated with each reference signal resource indication.

15. The method according to claim 13, characterized in that The second part of the report also includes the reference signal received power associated with each reference signal resource indication.

16. The method according to claim 13, characterized in that The configuration information is specifically used to instruct the terminal device to feed back reference signal received power associated with some of the reference signal resource indications in the M reference signal resource indications in the channel state information report.

17. The method according to claim 2 or 6, characterized in that The first part of the report also includes a third field, and the third field is used to indicate whether the second part of the report includes the reference signal received power associated with the reference signal resource indication.

18. The method according to claim 17, characterized in that In the case where the third field is used to indicate that the second part report includes the reference signal received power associated with the reference signal resource indication, the first part report also includes a fourth field, and the fourth field is used to indicate the number of reference signal received powers included in the second part report.

19. A communication method, characterized in that: The method is applied to a network device, and the method includes: N reference signals sent to the terminal device, where N is an integer greater than 1; Receive a channel state information report sent by the terminal device, the channel state information report includes multiple channel state information sets, each of the channel state information sets includes a reference signal resource indication and channel state information associated with the reference signal resource indication, the channel state information report is obtained by the terminal device performing channel measurement on the N reference signals, wherein the number of channel state information sets is less than or equal to N.

20. The method according to claim 19, characterized in that The number of the channel state information sets is M, M≤N; the channel state information report includes a first part report, the first part report includes M reference signal resource indications, and at least one of a rank indication associated with each reference signal resource indication, a wideband channel quality indication of the first transmission block associated with each reference signal resource indication, and a subband channel quality indication of the first transmission block associated with each reference signal resource indication.

21. The method according to claim 20, characterized in that The channel state information report also includes a second part report, which includes at least one of a precoding matrix indication associated with each reference signal resource indication, a wideband channel quality indication of a second transport block associated with each reference signal resource indication, and a subband channel quality indication of a second transport block associated with each reference signal resource indication.

22. The method according to claim 20, characterized in that The arrangement order of the channel state information associated with each reference signal resource indication corresponds to the sorting order of the M reference signal resource indications in the first part of the report.

23. The method according to claim 20, characterized in that The first part report also includes a sequence consisting of N bits, and the states of M bits out of the N bits are used to indicate the M reference signal resource indications; or, the first part report also includes a first field, and the first field is used to indicate the M reference signal resource indications.

24. The method according to claim 19, wherein The channel state information report includes a first part report, which includes a first reference signal resource indication, and at least one of a rank indication associated with the first reference signal resource indication, a wideband channel quality indication of the first transport block associated with the first reference signal resource indication, and a subband channel quality indication of the first transport block associated with the first reference signal resource indication, and the first reference signal resource indication is one of multiple reference signal resource indications.

25. The method according to claim 24, characterized in that The first part of the channel state information further includes a second field, where the second field is used to indicate the number K of reference signal resource indications included in the second part of the report, where K≤M-1 and M≤N.

26. The method according to claim 25, characterized in that The rank indicator associated with each of the K reference signal resource indications is the same as the rank indicator associated with the first reference signal resource indication.

27. The method according to any one of claims 24 to 26, characterized in that The channel state information report also includes a second part report, which includes K reference signal resource indications, channel state information associated with the K reference signal resource indications, and remaining channel state information associated with the first reference signal resource indication, K≤M-1, M≤N.

28. The method according to any one of claims 24 to 26, characterized in that The channel state information report also includes a second part report, which includes first information, and the first information includes at least one of a wideband channel quality indication of the second transport block associated with the first reference signal resource indication and a wideband precoding matrix indication associated with the first reference signal resource indication, and at least one of a wideband precoding matrix indication associated with each of the K reference signal resource indications, a wideband channel quality indication of the first transport block, a subband channel quality indication of the first transport block, and a wideband channel quality indication of the second transport block.

29. The method according to claim 28, characterized in that The second part report also includes second information, which includes the precoding matrix indication of the even subband associated with the first reference signal resource indication and / or the channel quality indication of the even subband of the second transport block, and the precoding matrix indication of the even subband associated with each of the K reference signal resource indications and / or the channel quality indication of the even subband of the second transport block.

30. The method according to claim 28 or 29, characterized in that The second part report also includes third information, wherein the third information includes the precoding matrix indication of the odd subband associated with the first reference signal resource indication and / or the channel quality indication of the odd subband of the second transport block, and the precoding matrix indication of the odd subband associated with each of the K reference signal resource indications and / or the channel quality indication of the odd subband of the second transport block.

31. The method according to claim 20 or 24, characterized in that The method further comprises: Configuration information sent to the terminal device, wherein the configuration information is used to instruct the terminal device to feed back the reference signal received power associated with each reference signal resource indication in the channel state information report.

32. The method according to claim 31, characterized in that The first part of the report also includes a reference signal received power associated with each reference signal resource indication.

33. The method according to claim 31, characterized in that The second part of the report also includes the reference signal received power associated with each reference signal resource indication.

34. The method according to claim 31, wherein The configuration information is specifically used to instruct the terminal device to feed back reference signal received power associated with some of the reference signal resource indications in the M reference signal resource indications in the channel state information report.

35. The method according to claim 20 or 24, characterized in that The first part of the report also includes a third field, and the third field is used to indicate whether the second part of the report includes the reference signal received power associated with the reference signal resource indication.

36. The method according to claim 35, characterized in that In the case where the third field is used to indicate that the second part report includes the reference signal received power associated with the reference signal resource indication, the first part report also includes a fourth field, and the fourth field is used to indicate the number of reference signal received powers included in the second part report.

37. A communication device, characterized in that: The method comprises a unit for executing the steps of the method according to any one of claims 1 to 18, or a unit for executing the steps of the method according to any one of claims 19 to 36.

38. A communication device, characterized in that: The method comprises a processor and an interface, wherein the interface is used to send and / or receive signals, so that the processor executes: the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 36.

39. A communication device, characterized in that: include: A processor, the processor being coupled to a memory, the memory being used to store a program or instruction, wherein when the program or instruction is executed by the processor, the communication device executes: the method according to any one of claims 1-18, or the method according to any one of claims 19-36.

40. A computer-readable medium for storing a computer program, characterized in that When the computer program is run on a computer, the computer is caused to perform: the method according to any one of claims 1 to 18, or the method according to any one of claims 19 to 36.

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