Channel state information transmission method and device, storage medium and program product

Abstract

The embodiment of the invention provides a channel state information transmission method and device, a storage medium and a program product, relates to the technical field of communication, and is used for reducing the resource overhead of reference signals and flexibly obtaining high-quality channel state information. The method is applied to a first node, and the method comprises: receiving first configuration information sent by a second node, the first configuration information comprising a first report configuration, the first report configuration comprising contents that should be included in first channel state information and a first report frequency band of the first channel state information; the first configuration information is used for indicating at least one of the following items: a first reference signal resource used for bearing the measured first reference signal and a carrier where the first reference signal resource is located; measuring a first reference signal based on the first report configuration to obtain first channel state information; and transmitting the first channel state information to the second node.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a method, apparatus, storage medium, and program product for transmitting channel state information. Background Art

[0002] Channel state information is obtained through reference signals to improve the efficiency of data transmission. However, the reference signals consume a large amount of resource overhead, thereby reducing the performance of the system. How to reduce the resource overhead of the reference signals and flexibly obtain high-quality channel state information is a problem that needs to be solved. Summary of the Invention

[0003] Embodiments of the present disclosure provide a method, apparatus, storage medium, and program product for transmitting channel state information, which are used to reduce the resource overhead of reference signals and flexibly obtain high-quality channel state information.

[0004] To achieve the above object, the present disclosure adopts the following technical solutions:

[0005] In a first aspect, a method for transmitting channel state information is provided, which is applied to a first node. The method includes:

[0006] Receiving first configuration information sent by a second node, where the first configuration information includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and a first reporting frequency band of the first channel state information; the first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, and a carrier where the first reference signal resource is located;

[0007] Measuring the first reference signal based on the first reporting configuration to obtain first channel state information;

[0008] Transmitting the first channel state information to the second node.

[0009] In a second aspect, a method for transmitting channel state information is provided, which is applied to a second node. The method includes:

[0010] Sending the first configuration information to the first node, where the first configuration information includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and a first reporting frequency band of the first channel state information; the first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, and a carrier where the first reference signal resource is located;

[0011] Receiving the first channel state information sent by the first node.

[0012] In a third aspect, a communication device is provided, which is applied to the first node and includes:

[0013] A receiving unit, configured to receive first configuration information sent by a second node, where the first configuration information includes a first reporting configuration, and the first reporting configuration includes contents that the first channel state information should include and a first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, and a carrier where the first reference signal resource is located;

[0014] A processing unit, configured to measure the first reference signal based on the first reporting configuration to obtain first channel state information;

[0015] A transmitting unit, configured to transmit the first channel state information to the second node.

[0016] In a fourth aspect, a communication device is provided, which is applied to a second node and includes:

[0017] A transmitting unit, configured to send first configuration information to a first node, where the first configuration information includes a first reporting configuration, and the first reporting configuration includes contents that the first channel state information should include and a first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, and a carrier where the first reference signal resource is located;

[0018] A receiving unit, configured to receive the first channel state information sent by the first node.

[0019] In a fifth aspect, a communication device is provided, including: a processor and a memory; the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the communication device implements any method provided in the first aspect or the second aspect above.

[0020] In a sixth aspect, a computer-readable storage medium is provided, where the computer-readable storage medium stores computer instructions, and when the computer instructions are run on a computer, the computer executes any method provided in the first aspect or the second aspect.

[0021] In a seventh aspect, a computer program product including computer instructions is provided, and when the computer instructions are run on a computer, the computer executes any method provided in the first aspect or the second aspect.

[0022] In the embodiments of the present disclosure, the first configuration information sent by the second node includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and the first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: the first reference signal resource for carrying the measured first reference signal, and the carrier where the first reference signal resource is located; thus, by flexibly configuring the carrier where the first reference signal resource is located, it is convenient for the first node to flexibly measure the first reference signal based on the first reporting configuration, obtain the first channel state information, thereby reducing the resource overhead of the reference signal resource, and ensuring the performance of the obtained channel state information, so as to flexibly obtain high-quality channel state information. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solutions of the present disclosure, and do not constitute a limitation to the technical solutions of the present disclosure.

[0024] Figure 1 It is a schematic structural diagram of a communication system provided by an embodiment of the present disclosure;

[0025] Figure 2 It is a schematic flowchart of a method for transmitting channel state information provided by an embodiment of the present disclosure;

[0026] Figure 3 It is a schematic flowchart of another method for transmitting channel state information provided by an embodiment of the present disclosure;

[0027] Figure 4 It is a schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure;

[0028] Figure 5 It is a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure;

[0029] Figure 6 It is a schematic structural diagram of a communication device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0031] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third-person singular form "comprises" and the present participle form "comprising", are to be construed in an open, inclusive sense, i.e., "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example", or "some examples", etc. are intended to indicate that a particular feature, structure, material, or characteristic related to the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the described particular features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner.

[0032] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0033] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present disclosure should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0034] In addition, the use of "based on" means open and inclusive, because a process, step, calculation, or other action "based on" one or more of the stated conditions or values may, in practice, be based on additional conditions or values beyond those stated.

[0035] In the technology based on orthogonal frequency division multiplexing (OFDM) modulation, the smallest frequency-domain unit is the subcarrier, and the smallest time-domain unit is the OFDM symbol; to facilitate the use of frequency-domain resources, a resource block (RB) is defined, and a resource block is defined as a specific number of consecutive subcarriers; a bandwidth part (BWP) is also defined, and a bandwidth part is defined as a specific number of consecutive resource blocks on a carrier; to facilitate the use of time-domain resources, a slot is defined, and a slot is defined as a specific number of consecutive OFDM symbols.

[0036] The reference signal sent by the base station to the terminal is the downlink reference signal; in the long term evolution (LTE) system, the downlink reference signals used for channel state information reporting include the cell-specific reference signal (CRS) and the channel-state information reference signal (CSI-RS); in the new radio (NR) system, the downlink reference signals used for channel state information reporting include the channel-state information reference signal (CSI-RS). The channel-state information reference signal (CSI-RS) is carried by the channel-state information reference signal resource (CSI-RS Resource), and the channel-state information reference signal resource is composed of code division multiplexing (CDM) groups (groups). A CDM group is composed of radio resource elements, and the CSI-RS of a group of CSI-RS ports is multiplexed thereon in a code division multiplexing manner.

[0037] The content of the channel state information transmitted between the base station and the terminal includes a channel quality indicator (CQI) for indicating the quality of the channel; or includes a precoding matrix indicator (PMI) for indicating the precoding matrix applied to the base station antennas. One type of CQI reporting format is wideband CQI reporting, that is, reporting a channel quality for the channel state information reporting band, and this channel quality corresponds to the entire channel state information reporting band; another type of CQI reporting format is subband CQI reporting, that is, giving the channel quality for each subband of the channel state information reporting band separately, where one channel quality corresponds to one subband, that is, reporting a channel quality for each subband of the channel state information reporting band. The subband mentioned above is a frequency domain unit, defined as N consecutive resource blocks (RBs), where N is a positive integer; for the convenience of description, the present disclosure refers to it as a channel quality indication subband, or a CQI subband, or a subband; among them, N is called the size of the CQI subband, or the CQI subband size, or the subband size. The bandwidth part (BWP) is divided into subbands, and the channel state information reporting band is defined by a subset of the subbands of the bandwidth part (BWP). The channel state information reporting band is the band on which the channel state information needs to be reported.

[0038] One way to determine the channel quality is to determine it according to the strength of the reference signal received by the terminal; another way to determine the channel quality is to determine it according to the signal-to-interference-plus-noise ratio of the received reference signal. On the channel state information reporting band, if the channel quality does not change much, reporting CQI in the wideband CQI reporting manner can reduce the resource overhead for CQI reporting; if the channel quality varies greatly in the frequency domain, reporting CQI in the subband CQI reporting manner can increase the accuracy of CQI reporting.

[0039] One type of PMI reporting format is the wideband PMI report, which reports a PMI for the channel state information reporting band (CSI reporting band), and this PMI corresponds to the entire channel state information reporting band. Another type of PMI reporting format is the sub-band PMI report, which reports a PMI for each sub-band of the channel state information reporting band, or reports a component of a PMI for each sub-band of the channel state information reporting band. For example, if the PMI consists of X1 and X2, one way to report a component of a PMI for each sub-band of the channel state information reporting band is to report an X1 for the entire band and an X2 for each sub-band; another way is to report an X1 and an X2 for each sub-band.

[0040] Another type of PMI reporting format is that the reported PMI indicates R precoding matrices for each sub-band, where R is a positive integer. In terms of the frequency-domain granularity of the feedback precoding matrix, R also represents the number of precoding matrix sub-bands included in each sub-band, or the number of precoding matrix sub-bands included in each CQI sub-band.

[0041] The base station transmits a reference signal; the terminal measures the reference signal, determines the channel state information from the base station to the terminal, and reports the channel state information to the base station; the base station receives the channel state information reported by the terminal. The base station determines the data transmission strategy based on the received channel state information and transmits data, thereby improving the efficiency of data transmission.

[0042] The channel state information is obtained through the reference signal to improve the efficiency of data transmission. However, the reference signal occupies a large amount of resource overhead, thus reducing the performance of the system. How to reduce the resource overhead of the reference signal and flexibly obtain high-quality channel state information is a problem that needs to be solved.

[0043] Based on this, the embodiments of the present disclosure provide a method, device, storage medium, and program product for transmitting channel state information. The first configuration information sent by the second node includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and the first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: the first reference signal resource for carrying the measured first reference signal, the carrier where the first reference signal resource is located; thus, by flexibly configuring the carrier where the first reference signal resource is located, it is convenient for the first node to flexibly measure the first reference signal based on the first reporting configuration to obtain the first channel state information, thereby reducing the resource overhead of the reference signal resource and ensuring the performance of the obtained channel state information to flexibly obtain high-quality channel state information.

[0044] The solutions of the embodiments of the present disclosure will be introduced below with reference to the accompanying drawings.

[0045] The technical solutions provided by the embodiments of the present disclosure can be applied to various mobile communication networks. For example, NR mobile communication networks adopting the 5th generation mobile networks (5G), future mobile communication networks (such as 6G wireless communication systems), or various communication convergence systems, etc. The embodiments of the present disclosure do not limit this.

[0046] In the embodiments of the present disclosure, the mobile communication network (including but not limited to the third generation 3G, the fourth generation 4G, the fifth generation 5G, and future mobile communication networks, such as the sixth generation mobile communication network 6G) may include network side devices (such as including but not limited to base stations) and receiving side devices (such as including but not limited to terminals). And it should be understood that, in this example, for example, in the downlink, the first communication node (which may also be referred to as the first communication node device, the first node) may be a base station side device, and the second communication node (which may also be referred to as the second communication node device, the second node) may be a terminal side device. In some examples, for example, in the uplink, the first communication node may also be a terminal side device, and the second communication node may also be a base station side device. In some examples, for example, in device-to-device communication between two communication nodes, both the first communication node and the second communication node may be base stations or terminals. Therefore, whether the first node and the second node are base stations or terminals needs to be determined according to the context.

[0047] Figure 1 Shown is a schematic structural diagram of a communication system provided by the embodiments of the present disclosure. As Figure 1 shown, the communication system includes but is not limited to a first node 110 and a second node 120. Among them. Wireless signals can be transmitted, received, and related interactions, etc. between the first node 110 and the second node 120.

[0048] In a wireless communication scenario, the first node 110 communicates with the second node 120 via a wireless channel. For example, the first node 110 is a terminal, and the second node 120 is a base station, and they communicate via a wireless channel. Another example is that the first node 110 is a terminal, and the second node 120 is a wireless router, and the wireless router and the terminal communicate via a wireless channel. Another example is that the first node 110 is a first base station, and the second node 120 is a second base station, and the first base station and the second base station communicate via a wireless channel. Another example is that the first node 110 is a first terminal, and the second node 120 is a second terminal, and the first terminal and the second terminal communicate via a wireless channel. Another example is that the first node 110 is a repeater, and the second node 120 is a base station, and the base station and the repeater communicate via a wireless channel. Another example is that the first node 110 is a terminal, and the second node 120 is a repeater, and the repeater and the terminal communicate via a wireless channel. Another example is that the first node 110 is a first repeater, and the second node 120 is a second repeater, and the first repeater and the second repeater communicate via a wireless channel. Another example is that the first node 110 is a base station, and the second node 120 is a satellite, and the satellite and the base station communicate via a wireless channel. Another example is that the first node 110 is a satellite, and the second node 120 is a base station, and the base station and the satellite communicate via a wireless channel. Another example is that the first node 110 is a terminal, and the second node 120 is a satellite, and the satellite and the terminal communicate via a wireless channel. Another example is that the first node 110 is a satellite, and the second node 120 is a terminal, and the terminal and the satellite communicate via a wireless channel. Another example is that the first node 110 is a ground device, and the second node 120 is an aircraft, and the aircraft and the ground device communicate via a wireless channel. Another example is that the first node 110 is a first aircraft, and the second node 120 is a second aircraft, and the first aircraft and the second aircraft communicate via a wireless channel.

[0049] In the present disclosure, the "first" node, "second" node, "first" method, "second" method, "first" matrix, "second" matrix, "first" part, "second" part, unless otherwise specified, are only used for descriptive distinction and do not represent the front-back or sequence order.

[0050] In the present disclosure, the base station may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTE-A), or an evolved Node B (eNB or eNodeB), a base station device in a 5G network, or a base station in a future communication system (such as 6G, etc.). The base station may include various macro base stations, micro base stations, home base stations, remote radio heads, reconfigurable intelligent surfaces (RISs), routers, Wireless Fidelity (WIFI) devices, or various network-side devices such as a primary cell and a secondary cell.

[0051] In the present disclosure, the terminal is a device with wireless transceiver functions, which can be deployed on land, including indoors or outdoors; it can also be deployed on water (such as a ship, etc.); it can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal may be a mobile phone, a tablet computer (Pad), a computer with wireless transceiver functions, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and so on. The embodiments of the present disclosure do not limit the application scenarios. Sometimes the terminal may also be referred to as a user, a user equipment, an access terminal, a UE unit, a UE station, a mobile station, a mobile unit, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE agent, or a UE device, etc. The embodiments of the present disclosure do not limit this.

[0052] It should be understood that Figure 1 is an exemplary structural diagram, Figure 1 The number of devices included in the shown communication system is not limited. For example, the number of the first node and the second node is not limited. And, in addition to Figure 1 the shown devices, Figure 1 the shown communication system may also include other devices, which are not limited herein.

[0053] Next, as Figure 2 shown, an embodiment of the present disclosure provides a method for transmitting channel state information. The method is applied to a first node, and the first node may be the first node 110 shown above Figure 1 . The method may include the following steps:

[0054] S101. Receive first configuration information sent by a second node.

[0055] Wherein, the first configuration information includes a first reporting configuration. The first reporting configuration includes the content that the first channel state information should include and the first reporting band of the first channel state information. The first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, and the carrier where the first reference signal resource is located;

[0056] The second node may be the second node 120 shown above Figure 1 . For ease of description, in the following embodiments, the first node is taken as a terminal and the second node is taken as a base station to illustrate a method for transmitting channel state information provided by an embodiment of the present disclosure.

[0057] The second node transmits the first configuration information to the first node; the first node receives the first configuration information. The content that the first channel state information that the first node needs to report is indicated by the first configuration information; the content that the first channel state information should include includes channel quality indication (CQI) and indication information of a precoding matrix. The first configuration information further includes the first reporting band of the first channel state information, and the channel state information on which frequency bands needs to be reported is indicated by the first reporting band of the first channel state information. Sometimes the first configuration information indicates that the CQI in the channel state information should include wideband CQI, sometimes it indicates that it should include sub-band CQI, and sometimes it indicates that it should include both wideband CQI and sub-band CQI. Sometimes the first configuration information indicates that the channel state information includes CQI, but does not specify which type of CQI, and then it is determined by the first node.

[0058] The indication information of the precoding matrix is used to indicate the precoding matrix. Sometimes the indication information of the precoding matrix is the precoding matrix itself, and sometimes it is an indicator.

[0059] The first node determines the first channel state information to be reported by measuring the reference signal on the first reference signal resource. The first configuration information further includes carrier information where the first reference signal resource is located. Wherein, the first reference signal resource is used to carry the reference signal.

[0060] For example, the first reference signal resource is used to carry the reference signal thereon.

[0061] The first configuration information further includes the carrier on which the first reference signal resource is located. In wireless communication, data and signals are transmitted through carriers. The physical form of a carrier is an electromagnetic carrier. A carrier has a certain position in the frequency domain. In some cases, carriers are distinguished by different frequency domain positions. In some other cases, carriers are distinguished by a combination of different frequency domain positions and spatial positions. In some other cases, carriers are distinguished by a combination of different frequency domain positions, spatial positions, and beams. The beam can be broadly understood as the direction of carrier transmission, and the spatial position can be understood as the starting point of carrier transmission.

[0062] In the first configuration information, the carrier can be indicated by a carrier identifier. The first configuration information further includes the carrier information on which the first reference signal resource is located.

[0063] In some embodiments, the first configuration information is further used to indicate the carrier on which the first reporting band is located, and the indication method includes at least one of the following:

[0064] Method 1: The first configuration information is used to indicate the carrier on which the first reference signal resource is located, and the carrier on which the first reference signal resource is located is used to determine the carrier on which the first reporting band is located.

[0065] For example, the carrier on which the first reporting band of the first channel state information is located is the carrier on which the first reference signal resource is located. For another example, the carrier on which the first reporting band of the first channel state information is located is the sum of the carrier on which the first reference signal resource is located and a frequency domain offset value. Among them, the frequency domain offset value can be indicated in the configuration information. By indicating the frequency domain offset value, the interval size between the frequency domain in which the reported first channel state information is located and the carrier domain in which the measured reference signal or the first reference signal resource is located can be indicated; or the interval size between the position of the frequency domain in which the reported first channel state information is located and the position of the carrier domain in which the measured reference signal or the first reference signal resource is located can be indicated. The direction of the offset of the frequency domain in which the reported first channel state information is located relative to the carrier domain in which the measured reference signal or the first reference signal resource is located can also be indicated by this offset value.

[0066] This frequency-domain offset value helps the first node determine the processing method to be used from measuring the reference signal on the first reference signal resource to obtaining the first channel state information to be reported. For example, by measuring the reference signal on the first reference signal resource, the channel state in the frequency domain where the measured reference signal is located is obtained, and the first channel state information to be reported is predicted from the channel state in the frequency domain where the measured reference signal is located, where the parameters in the prediction method are determined by the frequency-domain offset value; that is, determining the processing method by the frequency-domain offset value is determining the parameters in the prediction method by the frequency-domain offset value. For another example, the machine learning model used in the prediction method is determined by the frequency-domain offset value, such as selecting one or more models from candidate machine learning models, or using the frequency-domain offset value as an input parameter of the used machine learning model. This frequency-domain offset value can also be reported by the first node to the second node before reporting the channel state information, so that the two communication parties reach an agreement.

[0067] Method 2: The first configuration information includes indication information for indicating the carrier where the first reporting frequency band is located.

[0068] For example, in the first configuration information, the identification information or identification number of the carrier where the first reporting frequency band of the first channel state information is located is displayed.

[0069] Method 3: The first configuration information is used to indicate that the carrier where the first reporting frequency band is located is the carrier where the downlink control signaling for triggering the reporting of channel state information is located.

[0070] The first configuration information further includes a channel state information reporting configuration corresponding to the reporting of channel state information, where reporting the channel state information is the implementation behavior of the channel state information reporting configuration. The first node receives the downlink control signaling of the second node, and the downlink control signaling contains information for triggering the implementation behavior of the channel state information reporting configuration; this downlink control signaling is the downlink control signaling for triggering the reporting of channel state information; the carrier where the first reporting frequency band of the first channel state information is located is the carrier where the downlink control signaling for triggering the reporting of channel state information is located.

[0071] Method 4: The first configuration information is used to indicate the carrier where the first reporting frequency band is located from candidate carriers.

[0072] Among them, the candidate carriers are determined according to at least one of the following:

[0073] The frequency-domain range width of the first reference signal resource;

[0074] The code division multiplexing length on the first reference signal resource.

[0075] Taking the determination of the candidate carrier based on the frequency-domain range width of the first reference signal resource as an example. For example, the candidate carrier is a carrier whose frequency-domain spacing or the absolute value of the frequency-domain spacing is less than the maximum frequency-domain spacing; where the maximum frequency-domain spacing is determined by the frequency-domain range width of the first reference signal resource where the measured reference signal is located. The maximum frequency-domain spacing is a positive number; corresponding to the frequency-domain spacing being a non-negative number, the candidate carrier is a carrier whose frequency-domain spacing is less than the maximum frequency-domain spacing; corresponding to the frequency-domain spacing being a negative number, the candidate carrier is a carrier whose absolute value of the frequency-domain spacing is less than the maximum frequency-domain spacing.

[0076] Also, for example, the frequency-domain range width of the first reference signal resource where the measured reference signal is located is b, and the maximum frequency-domain spacing is d; where, corresponding to b being B1, d is D1; corresponding to b being B2, d is D2; where B1 is greater than B2; D1 is greater than D2.

[0077] Taking the determination of the candidate carrier based on the code division multiplexing length on the first reference signal resource as an example, the reference signal is transmitted through multiple ports, and the reference signals between the multiple ports are carried on the reference signal resource in a code division multiplexing manner, where the length of the code used for the code division multiplexing is determined by the code division multiplexing length on the first reference signal resource where the first reference signal is located.

[0078] The carrier where the first reporting band is located is indicated by the first configuration information from the candidate carriers; where the candidate carriers are determined based on the code division multiplexing length on the first reference signal resource where the measured reference signal is located.

[0079] For example, the candidate carrier is a carrier whose frequency-domain spacing or the absolute value of the frequency-domain spacing is less than the maximum frequency-domain spacing; where the maximum frequency-domain spacing is determined by the frequency-domain range width of the first reference signal resource where the measured reference signal is located. The maximum frequency-domain spacing is a positive number; corresponding to the frequency-domain spacing being a non-negative number, the candidate carrier is a carrier whose frequency-domain spacing is less than the maximum frequency-domain spacing; corresponding to the frequency-domain spacing being a negative number, the candidate carrier is a carrier whose absolute value of the frequency-domain spacing is less than the maximum frequency-domain spacing.

[0080] For example, the code division multiplexing length on the first reference signal resource where the measured reference signal is located is c, and the maximum frequency-domain spacing is d; where, corresponding to c being C1, d is D1; corresponding to c being C2, d is D2; where C1 is greater than C2; D1 is greater than D2.

[0081] The above embodiments are described by taking the first configuration information also being used to indicate the carrier where the first reporting band is located as an example. In some embodiments, the carrier where the first reporting band is located is defaulted to be the carrier where the downlink control signaling for triggering the reporting of channel state information is located.

[0082] That is to say, the carrier on which the first reporting band of the first channel state information is not indicated in the first configuration information is the carrier on which the downlink control signaling for triggering the reporting of the channel state information is located; by default, the carrier on which the first reporting band of the first channel state information is located is the carrier on which the downlink control signaling for triggering the reporting of the channel state information is located. For example, a first node receives first configuration information from a second node; the first configuration information includes the content of the first channel state information that the first node should report and the first reporting band of the first channel state information; wherein, the carrier on which the first reporting band of the first channel state information is located is the carrier on which the downlink control signaling for triggering the reporting of the channel state information is located; the first node measures a reference signal according to the first configuration information and determines the first channel state information that should be reported; and reports the first channel state information to the second node.

[0083] By flexibly configuring the carrier on which the first reporting band of the first channel state information is located, the transmission of reference signals on the corresponding reporting band is reduced, thereby reducing the overhead of reference signal resources and ensuring the performance of the obtained channel state information.

[0084] In some embodiments, the first reporting band includes sub-bands, that is, the size of the sub-band is determined based on the frequency-domain spacing between the carrier on which the first reporting band is located and the carrier on which the first reference signal resource is located.

[0085] That is to say, the first reporting band of the first channel state information is composed of sub-bands, and the size of the sub-band is determined according to the frequency-domain spacing between the carrier on which the first reporting band of the first channel state information is located and the carrier on which the first reference signal resource of the measured reference signal is located.

[0086] For example, the carrier on which the first reference signal resource of the measured reference signal is located is CC_1, and the carrier on which the first reporting band of the first channel state information is located is CC_2, where the frequency-domain spacing between CC_2 and CC_1 is m; the size of the sub-band of the first reporting band of the first channel state information is s; wherein, corresponding to m being M1, s is S1; corresponding to m being M2, s is S2; where M1 is less than M2; S1 is less than S2.

[0087] In some embodiments, the frequency-domain spacing includes any one of the following:

[0088] The frequency-domain position of the carrier on which the first reporting band is located is higher than the frequency-domain position of the carrier on which the first reference signal resource is located, and the frequency-domain spacing is the frequency-domain spacing between the resource block with the lowest frequency of the first reporting band and the resource block with the highest frequency in the frequency-domain range of the first reference signal resource; or,

[0089] The frequency-domain position of the carrier where the first reporting band is located is lower than the frequency-domain position of the carrier where the first reference signal resource is located, and the frequency-domain spacing is the frequency-domain spacing between the resource block at the highest frequency of the first reporting band and the resource block at the lowest frequency of the frequency-domain range where the first reference signal resource is located; or,

[0090] The frequency-domain spacing is the frequency-domain spacing between the center of the frequency domain of the first reporting band and the center of the frequency-domain range where the first reference signal resource is located.

[0091] That is to say, the frequency-domain spacing is determined by one of the following methods:

[0092] 1) The carrier where the first reporting band of the first channel state information is located is higher in frequency-domain position than the carrier where the first reference signal resource where the reference signal is located. The frequency-domain spacing is the frequency-domain spacing between the resource block at the lowest frequency of the first reporting band of the first channel state information and the resource block at the highest frequency of the frequency-domain range where the first reference signal resource is located.

[0093] For example, the resource block at the lowest frequency of the first reporting band of the first channel state information is Rc_L, and the resource block at the highest frequency of the first reporting band of the first channel state information is Rc_H; the resource block at the lowest frequency of the frequency-domain range where the first reference signal resource is located is Rs_L, and the resource block at the highest frequency of the frequency-domain range where the first reference signal resource is located is Rs_H. Corresponding to the carrier where the first reporting band of the first channel state information is higher in frequency-domain position than the carrier where the first reference signal resource where the reference signal is located, the frequency-domain spacing between the carrier where the first reporting band of the first channel state information is located and the carrier where the first reference signal resource where the measured reference signal is located is the frequency-domain spacing between the resource block Rc_L and the resource block Rs_H.

[0094] That is, the size of the sub-band of the first reporting band of the first channel state information is determined by the closest frequency-domain spacing between the first reporting band of the first channel state information and the frequency-domain range where the first reference signal resource is located.

[0095] 2) The carrier where the first reporting band of the first channel state information is located is lower in frequency-domain position than the carrier where the first reference signal resource where the reference signal is located. The frequency-domain spacing is the frequency-domain spacing between the resource block at the highest frequency of the first reporting band of the first channel state information and the resource block at the lowest frequency of the frequency-domain range where the first reference signal resource is located.

[0096] For example, the resource block with the lowest frequency in the first reporting band of the first channel state information is Rc_L, and the resource block with the highest frequency in the first reporting band of the first channel state information is Rc_H; the resource block with the lowest frequency in the frequency domain range where the first reference signal resource is located is Rs_L, and the resource block with the highest frequency in the frequency domain range where the first reference signal resource is located is Rs_H. Corresponding to this, the carrier where the first reporting band of the first channel state information is located has a lower frequency domain position than the carrier where the first reference signal resource where the reference signal is located. The frequency domain spacing between the carrier where the first reporting band of the first channel state information is located and the carrier where the first reference signal resource where the measured reference signal is located is the frequency domain spacing between resource block Rc_H and resource block Rs_L.

[0097] That is, the size of the sub-band of the first reporting band of the first channel state information is determined by the closest frequency domain spacing between the first reporting band of the first channel state information and the frequency domain range where the first reference signal resource is located.

[0098] 3) The frequency domain spacing is the frequency domain spacing between the frequency domain center of the first reporting band of the first channel state information and the center of the frequency domain range where the first reference signal resource is located.

[0099] For example, the resource block with the lowest frequency in the first reporting band of the first channel state information is Rc_L, and the resource block with the highest frequency in the first reporting band of the first channel state information is Rc_H; the resource block with the lowest frequency in the frequency domain range where the first reference signal resource is located is Rs_L, and the resource block with the highest frequency in the frequency domain range where the first reference signal resource is located is Rs_H. The frequency domain center of the first reporting band of the first channel state information is Rc_O, and the center of the frequency domain range where the first reference signal resource is located is Rs_O; the frequency domain spacing between the carrier where the first reporting band of the first channel state information is located and the carrier where the first reference signal resource where the measured reference signal is located is the frequency domain spacing between Rc_O and Rs_O. Among them, Rc_O is determined by Rc_L and Rc_H. For example, Rc_O is the average value of Rc_L and Rc_H. Rs_O is determined by Rs_L and Rs_H. For example, Rs_O is the average value of Rs_L and Rs_H.

[0100] That is, the size of the sub-band of the first reporting band of the first channel state information is determined by the frequency domain spacing between the frequency domain center of the first reporting band of the first channel state information and the center of the frequency domain range where the first reference signal resource is located; in this way, the influence brought by the overall range of the first reporting band of the first channel state information is taken into account, so as to obtain an average performance effect; the influence brought by the frequency domain range where the first reference signal resource is located is taken into account, so as to obtain an average performance effect.

[0101] In some embodiments, the size of the sub-band is determined based on the frequency domain range width of the first reference signal resource.

[0102] For example, the size of the sub-band of the first reporting band of the first channel state information is s; the width of the frequency domain range of the first reference signal resource where the measured reference signal is located is b; where, corresponding to b being B1, s is S1; corresponding to b being B2, s is S2; where B1 is greater than B2; S1 is less than S2.

[0103] In some embodiments, the first reference signal includes K reference signals, and the K reference signals are respectively carried by K reference signal resources, and the K reference signal resources are respectively located in K carriers; where the K carriers are different from each other, or at least two of the K carriers are the same, and K is a positive integer.

[0104] The first reporting band includes sub-bands, and the size of the sub-bands is determined based on at least one of the following:

[0105] The width of the frequency domain range of the reference signal resource closest to the first reporting band;

[0106] The average value of the width of the frequency domain ranges of the K reference signal resources;

[0107] The average value of the width of the frequency domain ranges of N reference signal resources among the K reference signal resources, where N is a positive integer less than or equal to K.

[0108] In some embodiments, the N reference signal resources include the N reference signal resources with the largest width of the frequency domain range among the K reference signal resources.

[0109] That is to say, the reference signal measured by the first node includes K reference signals, and the K reference signals are respectively carried by K reference signal resources, and the K reference signal resources are respectively located in the first carrier, the second carrier,..., the Kth carrier; where the first carrier, the second carrier,..., the Kth carrier may be different from each other, or some of the carriers may be the same; the first reporting band of the first channel state information is composed of sub-bands, and the size of the sub-bands is determined according to one of the following:

[0110] 1) Determined by the width of the frequency domain range of the reference signal resource closest to the first reporting band of the first channel state information;

[0111] 2) The average value of the width of the frequency domain ranges of the K reference signal resources;

[0112] 3) The average value of the width of the frequency domain ranges of the N reference signal resources with the largest width of the frequency domain range among the K reference signal resources;

[0113] 4) The average value of the width of the frequency domain ranges of the N reference signal resources among the K reference signal resources.

[0114] For example, the size of the sub-band of the first reporting band of the first channel state information is s; the first reference signal resource is the reference signal resource closest to the first reporting band of the first channel state information among the K reference signal resources; the size of the sub-band of the first reporting band of the first channel state information is determined by the frequency domain range width of the first reference signal resource; for example, the frequency domain range width of the first reference signal resource is b; wherein, corresponding to b being B1, s is S1; corresponding to b being B2, s is S2; wherein B1 is greater than B2; S1 is less than S2.

[0115] Also for example, the size of the sub-band of the first reporting band of the first channel state information is s; the average value of the frequency domain range widths of the K reference signal resources is e; the size of the sub-band of the first reporting band of the first channel state information is determined by the average value of the frequency domain range widths of the K reference signal resources; for example, corresponding to e being E1, s is S1; corresponding to e being E2, s is S2; wherein E1 is greater than E2; S1 is less than S2.

[0116] Also for example, the size of the sub-band of the first reporting band of the first channel state information is s; the average value of the frequency domain range widths of the N reference signal resources with the largest frequency domain range widths among the K reference signal resources is f; the size of the sub-band of the first reporting band of the first channel state information is determined by the average value of the frequency domain range widths of the N reference signal resources with the largest frequency domain range widths among the K reference signal resources; for example, corresponding to f being F1, s is S1; corresponding to f being F2, s is S2; wherein F1 is greater than F2; S1 is less than S2.

[0117] Also for example, the size of the sub-band of the first reporting band of the first channel state information is s; the average value of the frequency domain range widths of the N reference signal resources among the K reference signal resources is g; the size of the sub-band of the first reporting band of the first channel state information is determined by the average value of the frequency domain range widths of the N reference signal resources with the largest frequency domain range widths among the K reference signal resources; for example, corresponding to g being G1, s is S1; corresponding to g being G2, s is S2; wherein G1 is greater than G2; S1 is less than S2.

[0118] S102. Measure the first reference signal based on the first reporting configuration to obtain the first channel state information.

[0119] For the description of how to measure the first reference signal based on the first reporting configuration to obtain the first channel state information, reference can be made to the description of measuring the reference signal to obtain the channel state information in the related art, which will not be elaborated here.

[0120] S103. Transmit the first channel state information to the second node.

[0121] That is, send the first channel state information to the second node.

[0122] Based on Figure 2 the embodiments shown, the first configuration information sent by the second node includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and the first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: the first reference signal resource for carrying the measured first reference signal, the carrier where the first reference signal resource is located; thus, by flexibly configuring the carrier where the first reference signal resource is located, it is convenient for the first node to flexibly measure the first reference signal based on the first reporting configuration, obtain the first channel state information, thereby reducing the resource overhead of the reference signal resource, and ensuring the performance of the obtained channel state information, so as to flexibly obtain high-quality channel state information.

[0123] In some embodiments, the first configuration information further includes a second reporting configuration, the second reporting configuration includes the content that the second channel state information should include and the second reporting band of the second channel state information, and the first configuration information is further used to indicate at least one of the following: the carrier where the second reporting band is located, the second reference signal resource for carrying the measured second reference signal, the carrier where the second reference signal resource is located.

[0124] The first node may further perform the following steps:

[0125] Measure the second reference signal based on the second reporting configuration to obtain the second channel state information;

[0126] Transmit the second channel state information to the second node.

[0127] That is to say, the first configuration information further includes a second reporting configuration, the second reporting configuration includes the content that the second channel state information report should include and the second reporting band of the second channel state information; and in the second reporting configuration, it indicates the carrier where the second reporting band is located, the second reference signal resource for carrying the measured second reference signal and the carrier where it is located; the first node measures the second reference signal according to the second configuration information and determines the second channel state information; and reports the second channel state information to the second node.

[0128] As an example, the second reporting band is different from the first reporting band, and the second reference signal resource is the same as the first reference signal resource.

[0129] Based on this example, the first channel state information and the second channel state information satisfy at least one of the following, or rather, there is one of the following corresponding reactions:

[0130] 1) The first channel state information includes the index number of the precoding matrix, and the second channel state information includes the offset value relative to the index number of the precoding matrix in the first channel state information.

[0131] One way that the second channel state information includes an offset value relative to the index number of the precoding matrix in the first channel state information is that each subband in the corresponding second reporting band includes an offset value respectively.

[0132] Another way that the second channel state information includes an offset value relative to the index number of the precoding matrix in the first channel state information is to include an offset value that is applied to each subband in the second reporting band.

[0133] One way that the second channel state information includes an offset value relative to the index number of the precoding matrix in the first channel state information is relative to the index number of the precoding matrix of the first subband in the first channel state information.

[0134] Another way that the second channel state information includes an offset value relative to the index number of the precoding matrix in the first channel state information is relative to the index number of the precoding matrix of the wideband in the first channel state information.

[0135] Another way that the second channel state information includes an offset value relative to the index number of the precoding matrix in the first channel state information is relative to the average value of the index numbers of the precoding matrices of each subband in the first channel state information.

[0136] 2) The channel quality indicator CQI in the second channel state information is determined based on the precoding matrix indicator in the first channel state information.

[0137] It should be understood that the second reporting band is different from the first reporting band, so the CQI of the second channel state information needs to be reported, while the second reference signal resource is the same as the first reference signal resource. Therefore, the precoding matrix indicator in the first channel state information can be used to indicate the precoding matrix in the first channel state information, thus saving the reporting resource overhead.

[0138] 3) The first channel state information reports the precoding matrix using the first codebook set, and the second channel state information reports the precoding matrix using the second codebook set; where the second codebook set is a subset of the first codebook set, and the number of codebooks in the second codebook set is less than the number of codebooks in the first codebook set.

[0139] It should be understood that the second channel state information uses the second codebook set with a number of codebooks less than that in the first codebook set to report the precoding matrix to save the reporting resource overhead.

[0140] As another example, the second reporting band is the same as the first reporting band, or the second reporting band is included in the first reporting band, and the frequency band range where the second reference signal resource is located includes the second reporting band.

[0141] It should be understood that in this example, through the second reporting configuration, the second channel state information of the second reporting band within the frequency band range where the second reference signal resource is located can be collected, as well as the first channel state information of the first reporting band that may not be within the frequency band range where the first reference signal resource is located but is the same as the second reporting band, so as to facilitate the comparison of the channel state information of the same reporting band under two different reports.

[0142] In some embodiments, the second reporting configuration includes any one of the configuration of the second reference signal resource, the identifier of the configuration of the second reference signal resource, and the identifier of the second reference signal resource; the configuration of the second reference signal resource includes the time offset of the second reference signal resource relative to the first reference signal resource.

[0143] In this way, by indicating the time offset of the second reference signal resource relative to the first reference signal resource in the second reporting configuration, it is ensured that the second reference signal resource has a fixed time offset relative to the first reference signal resource, so that the received second reference signal has a fixed time offset relative to the first reference signal, which is beneficial to predicting the channel state information on the second reporting band based on the first reference signal.

[0144] In some embodiments, the second reporting band is determined from the first reporting band.

[0145] It should be understood that the second reporting band is selected from the first reporting band to ensure that the second reporting band is within the frequency band range where the second reference signal resource is located; thus, it can be ensured that the second channel state information can monitor the first channel state information.

[0146] In some embodiments, the first node receives the downlink control information sent by the second node. The downlink control information includes the information for triggering the second channel state information report and includes the information for selecting the third reporting band from the second reporting band; the first node reports the second channel state information on the third reporting band.

[0147] In some embodiments, the number of antenna ports of the second reference signal resource is less than or equal to the number of antenna ports of the first reference signal resource; the method further includes:

[0148] Receiving the first indication information, the first indication information is used to indicate one of the following relationships:

[0149] The mapping relationship from the antenna ports of the second reference signal resource to the antenna ports of the first reference signal resource;

[0150] The mapping relationship from the antenna ports of the first reference signal resource to the antenna ports of the second reference signal resource.

[0151] It should be understood that the antenna port of a reference signal is used to transmit the reference signal. The reference signal exists in the reference signal resource. The antenna port of the reference signal is mapped to the reference signal resource to form the antenna port of the reference signal resource, and the antenna port of the reference signal resource can also be referred to as the reference signal resource port. The mapping relationship between the antenna port of the first reference signal and the antenna port of the second reference signal is also the mapping relationship between the antenna port of the first reference signal resource and the antenna port of the second reference signal resource. The mapping relationship between the antenna port of the first reference signal resource and the antenna port of the second reference signal resource, that is, the correspondence relationship between the antenna port of the first reference signal resource and the antenna port of the second reference signal resource, is also the correspondence relationship between the antenna port of the first reference signal and the antenna port of the second reference signal. The antenna port of the first reference signal and the antenna port of the second reference signal with a correspondence relationship have a common transmission relationship; for example, having a quasi-co-location relationship; or using the same spatial domain filter or spatial domain filtering method. For example, port 1, port 3, port 9, and port 11 in the antenna ports of the first reference signal resource correspond one-to-one with port 0, port 1, port 2, and port 3 in the antenna ports of the second reference signal resource; port 1 in the antenna ports of the first reference signal resource has a quasi-co-location relationship with port 0 in the antenna ports of the second reference signal resource, port 2 in the antenna ports of the first reference signal resource has a quasi-co-location relationship with port 2 in the antenna ports of the second reference signal resource, port 9 in the antenna ports of the first reference signal resource has a quasi-co-location relationship with port 2 in the antenna ports of the second reference signal resource, and port 11 in the antenna ports of the first reference signal resource has a quasi-co-location relationship with port 3 in the antenna ports of the second reference signal resource.

[0152] Or for another example, port 1, port 3, port 9, and port 11 in the antenna ports of the first reference signal resource correspond one-to-one with port 0, port 1, port 2, and port 3 in the antenna ports of the second reference signal resource; port 1 in the antenna ports of the first reference signal resource uses the same spatial domain filter as port 0 in the antenna ports of the second reference signal resource, port 2 in the antenna ports of the first reference signal resource uses the same spatial domain filter as port 2 in the antenna ports of the second reference signal resource, port 9 in the antenna ports of the first reference signal resource uses the same spatial domain filter as port 2 in the antenna ports of the second reference signal resource, and port 11 in the antenna ports of the first reference signal resource uses the same spatial domain filter as port 3 in the antenna ports of the second reference signal resource.

[0153] The first indication information indicates the mapping relationship from the antenna port of the second reference signal resource to the antenna port of the first reference signal resource, for example, indicating which antenna ports in the antenna ports of the first reference signal resource the antenna port of the second reference signal resource is mapped to.

[0154] The first indication information indicates the mapping relationship of the antenna ports of the first reference signal resource to the antenna ports of the second reference signal resource, for example, indicating which antenna ports in the antenna ports of the first reference signal resource are mapped to which antenna ports in the antenna ports of the first reference signal resource.

[0155] The first indication information may be included in the configuration information. For example, the first indication information is included in the second reporting configuration. Another example is that the first indication information is included in the configuration of the second reference signal resource.

[0156] The first indication information may be included in the downlink control signaling received by the first node from the second node, for example, in the downlink control information format signaling.

[0157] Through the correspondence relationship between the antenna ports of the second reference signal resource and the antenna ports of the first reference signal resource established by the first indication information, the second reference signal resource can carry reference signals with fewer antenna ports to monitor the first channel state information; or implement the comparison of the first channel state information using the second channel state information. Thus, the overhead of the second reference signal resource is saved.

[0158] Through the correspondence relationship between the antenna ports of the second reference signal resource and the antenna ports of the first reference signal resource established by the first indication information, the second channel state information with fewer antenna ports can be obtained, and the monitoring of the first channel state information can be realized; or the comparison of the first channel state information using the second channel state information can be realized. Thus, the resource overhead of reporting the second channel state information is saved.

[0159] The second channel state information may be report content similar to the first channel state information; the second channel state information may also be the result after comparing the result measured according to the second reference signal with the first channel state information.

[0160] In some embodiments, the first node receives the downlink control information sent by the second node, and the downlink control information is used to trigger the second reporting implementation method of the second reporting configuration. The second channel state information in the second reporting implementation method is used to monitor the first channel state information in the first reporting implementation method of the first reporting configuration; where the first reporting implementation method is the implementation method of the first reporting configuration that is closest to the second reporting implementation method and is before the time when the channel state information of the second reporting implementation method is the reference resource.

[0161] Among them, the implementation method has other names, for example, implementation instance, example, etc., and the embodiments of the present disclosure do not limit this. The reporting implementation method or reporting implementation instance both represent the specific implementation method or instance of the report. For example, the first reporting implementation method or the first reporting implementation instance represents the specific implementation method or instance of the first report.

[0162] In other words, the reporting configuration specifies how to report channel state information, while the reporting implementation or reporting implementation example is the specific situation or method of actually reporting according to this configuration. The reporting implementation or reporting implementation example describes how to obtain, process, and report channel state information according to the relevant configuration under specific conditions, and is a specific manifestation of transforming the abstract configuration into actual operations.

[0163] It should be noted that the implementation methods in the embodiments of the present disclosure can all be replaced by implementation examples. For example, the second reporting implementation method can be replaced by the second reporting implementation example, and the first reporting implementation method can be replaced by the first reporting implementation example.

[0164] It should be understood that the reporting implementation example of the channel state information reporting configuration is a reporting implementation according to the channel state information reporting configuration. There are multiple reporting implementations corresponding to the first reporting configuration. The second reporting implementation example triggered by the downlink control command for monitoring is only for one reporting implementation of the first reporting configuration; the implementation example of the first reporting configuration closest to the second reporting implementation example before the time when the channel state information reference resource using the second reporting implementation example is located is used as the monitored object, which can not only ensure the timeliness of monitoring, but also ensure that the first node has sufficient processing time to process the second reporting implementation example.

[0165] In some embodiments, the first channel state information includes channel state information at M time points, and the second channel state information includes monitoring information on the channel state information at M time points. Wherein, for each of the M time points, the monitoring information on the channel state information at each time point is determined according to the channel state information at each time point and the measurement result of the reference signal resource closest to the second reference signal resource, and M is an integer greater than 1.

[0166] That is to say, the first channel state information includes channel state information at M time points, which are the channel state information at the first time point,..., the channel state information at the Mth time point respectively; the second channel state information includes monitoring information on the channel state information at these M time points; among them, the monitoring information on the channel state information at the first time point is determined according to the channel state information at the first time point and the measurement result of the reference signal resource closest to the second reference signal resource.

[0167] It should be understood that the second reference signal resource may include 1 reference signal resource, or include more than 1 reference signal resource. In the second channel state information, using the reference signal resource in the second reference signal resource closest to the first time point to determine the monitoring information on the channel state information at the first time point can obtain an accurate monitoring effect and avoid introducing too large an error.

[0168] In some embodiments, when the monitoring information of the channel state information at Q time points among M time points corresponds to the same reference signal resource in the second reference signal resource, the second channel state information includes the monitoring information of the channel state information at the time point closest to the same reference signal resource, and does not include the monitoring information of the channel state information at the other Q - 1 time points, where Q is an integer less than or equal to M.

[0169] That is to say, the monitoring information of the channel state information corresponding to Q time points corresponds to the same reference signal resource in the second reference signal resource. The second channel state information includes the monitoring information of the channel state information at the time point closest to this reference signal resource, and discards the monitoring information of the channel state information at the remaining Q - 1 time points.

[0170] It should be understood that by selecting the monitoring information of the channel state information at the time point closest to this reference signal resource in the second channel state information and discarding the monitoring information of the channel state information at the remaining Q - 1 time points, accurate monitoring information can be obtained, inaccurate monitoring information can be avoided, and the resource overhead for transmitting the second channel state information can be reduced.

[0171] In some embodiments, the time when the first node clears the first channel state information from the memory is determined according to the transmission time of the first downlink control signaling, and the first downlink control signaling is used to trigger the first node to transmit the second channel state information to the second node.

[0172] Corresponding to the transmission time of the first downlink control signaling being before the first node transmits the second channel state information to the second node, the time when the first node clears the first channel state information from the memory is after the first node transmits the second channel state information to the second node;

[0173] Corresponding to the transmission time of the first downlink control signaling being after the first node transmits the first channel state information to the second node, the time when the first node clears the first channel state information from the memory is after the first node transmits the first channel state information to the second node.

[0174] That is to say, the time when the first node clears the first channel state information from the memory is determined according to the transmission time of the first downlink control signaling, and the first downlink control signaling is used to trigger the first node to report the second channel state information to the second node.

[0175] Corresponding to the transmission time of the first downlink control signaling being earlier than the first node reporting the first channel state information to the second node, the first node will clear the first channel state information from the memory after reporting the second channel state information to the second node.

[0176] The transmission time corresponding to the first downlink control signaling is later than the first node reporting the first channel state information to the second node, or the first node does not receive the first downlink control signaling. Correspondingly, the first node will clear the first channel state information from the memory after reporting the first channel state information to the second node.

[0177] In some embodiments, in response to the time for the first node to clear the first channel state information from the memory reaching, the first node clears the first channel state information from the memory.

[0178] It should be understood that the memory capacity owned by the first node is limited. If the memory is insufficient, it will affect the operation of the program. Therefore, it is necessary to timely clear the content that is not needed in the memory to ensure that the program can run with sufficient content. If the content in the memory is cleared too early, it will also affect the execution of some functions. Clearing the appropriate content from the memory at the right moment is beneficial to maintaining the operation of the program and ensuring beneficial functions. Determining the time for the first node to clear the first channel state information from the memory according to the transmission time of the first downlink control signaling is beneficial to maintaining the operation of the next program and ensuring that the first node determines the second channel state information, such as the second channel state information for monitoring the first channel state information, and reporting the first channel state information to the second node.

[0179] The above embodiments illustrate a method for transmitting channel state information provided by the embodiments of the present disclosure from the perspective of the first node. In some embodiments, as Figure 3 shown, the embodiments of the present disclosure also provide another method for transmitting channel state information, which is applied to the second node. The method may include the following steps:

[0180] S201. Send the first configuration information to the first node.

[0181] Wherein, the first configuration information includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and the first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: the first reference signal resource for carrying the measured first reference signal, the carrier where the first reference signal resource is located.

[0182] For the description of the first configuration information, reference may be made to the corresponding description in the above embodiments as Figure 2 shown, and details are not described herein again.

[0183] In some embodiments, the first configuration information is further used to indicate the carrier where the first reporting band is located, including at least one of the following:

[0184] The first configuration information is used to indicate the carrier where the first reference signal resource is located, and the carrier where the first reference signal resource is located is used to determine the carrier where the first reporting band is located;

[0185] The first configuration information includes indication information for indicating the carrier where the first reporting frequency band is located;

[0186] The first configuration information is used to indicate that the carrier where the first reporting frequency band is located is the carrier where the downlink control signaling for triggering the reporting of channel state information is located;

[0187] The first configuration information is used to indicate the carrier where the first reporting frequency band is located from among candidate carriers.

[0188] Among them, the candidate carriers are determined according to at least one of the following:

[0189] The frequency-domain range width of the first reference signal resource;

[0190] The code division multiplexing length on the first reference signal resource.

[0191] In some embodiments, the carrier where the first reporting frequency band is located is defaulted to the carrier where the downlink control signaling for triggering the reporting of channel state information is located.

[0192] In some embodiments, the first reporting frequency band includes sub-bands, and the size of the sub-bands is determined based on the frequency-domain spacing between the carrier where the first reporting frequency band is located and the carrier where the first reference signal resource is located. The frequency-domain spacing includes any one of the following:

[0193] The frequency-domain position of the carrier where the first reporting frequency band is located is higher than the frequency-domain position of the carrier where the first reference signal resource is located, and the frequency-domain spacing is the frequency-domain spacing between the resource block with the lowest frequency of the first reporting frequency band and the resource block with the highest frequency of the frequency-domain range where the first reference signal resource is located; or,

[0194] The frequency-domain position of the carrier where the first reporting frequency band is located is lower than the frequency-domain position of the carrier where the first reference signal resource is located, and the frequency-domain spacing is the frequency-domain spacing between the resource block with the highest frequency of the first reporting frequency band and the resource block with the lowest frequency of the frequency-domain range where the first reference signal resource is located; or,

[0195] The frequency-domain spacing is the frequency-domain spacing between the frequency-domain center of the first reporting frequency band and the center of the frequency-domain range where the first reference signal resource is located.

[0196] In some embodiments, the first reporting frequency band includes sub-bands, and the size of the sub-bands is determined based on the frequency-domain range width of the first reference signal resource.

[0197] In some embodiments, the first reference signal includes K reference signals, and the K reference signals are respectively carried by K reference signal resources, and the K reference signal resources are respectively located on K carriers; among them, the K carriers are different from each other, or at least two of the K carriers are the same, and K is a positive integer.

[0198] The size of the sub-band is determined based on at least one of the following:

[0199] The frequency-domain range bandwidth of the reference signal resource closest to the first reporting band;

[0200] The average value of the frequency-domain range widths of K reference signal resources;

[0201] The average value of the frequency-domain range widths of N reference signal resources among K reference signal resources, where N is a positive integer less than or equal to K.

[0202] In some embodiments, the N reference signal resources include the N reference signal resources with the largest frequency-domain range widths among the K reference signal resources.

[0203] S202. Receive the first channel state information sent by the first node.

[0204] Wherein, the first channel state information is obtained by the first node based on the first reporting configuration to measure the first reference signal.

[0205] In some embodiments, the first configuration information further includes a second reporting configuration, the second reporting configuration includes the content that the second channel state information should include and the second reporting band of the second channel state information, and the first configuration information is further used to indicate at least one of the following: the carrier where the second reporting band is located, the second reference signal resource for carrying the measured second reference signal, the carrier where the second reference signal resource is located.

[0206] The second node also receives the second channel state information transmitted by the first node, wherein the second channel state information is obtained by the first node based on the second reporting configuration to measure the second reference signal.

[0207] As an example, the second reporting band is different from the first reporting band, and the second reference signal resource is the same as the first reference signal resource.

[0208] Based on this, the first channel state information and the second channel state information satisfy at least one of the following:

[0209] The first channel state information includes the index number of the precoding matrix, and the second channel state information includes the offset value relative to the index number of the precoding matrix in the first channel state information;

[0210] The channel quality indicator CQI in the second channel state information is determined based on the precoding matrix indicator in the first channel state information;

[0211] The first channel state information reports a precoding matrix using a first codebook set, and the second channel state information reports a precoding matrix using a second codebook set; wherein, the second codebook set is a subset of the first codebook set, and the number of codebooks in the second codebook set is less than the number of codebooks in the first codebook set.

[0212] As another example, the second reporting band is the same as the first reporting band, or the second reporting band is included in the first reporting band, and the frequency band range where the second reference signal resource is located includes the second reporting band.

[0213] Based on this, the second reporting configuration includes any one of the configuration of the second reference signal resource, the identification of the configuration of the second reference signal resource, and the identification of the second reference signal resource; the configuration of the second reference signal resource includes the time offset of the second reference signal resource relative to the first reference signal resource.

[0214] In some embodiments, the second reporting band is determined from the first reporting band.

[0215] In some embodiments, the number of antenna ports of the second reference signal resource is less than or equal to the number of antenna ports of the first reference signal resource; the method further includes:

[0216] Sending first indication information to a first node, the first indication information being used to indicate one of the following relationships:

[0217] The mapping relationship from the antenna ports of the second reference signal resource to the antenna ports of the first reference signal resource;

[0218] The mapping relationship from the antenna ports of the first reference signal resource to the antenna ports of the second reference signal resource.

[0219] In some embodiments, a second node sends downlink control information to a first node, the downlink control information being used to trigger a second reporting implementation manner of the second reporting configuration, and the second channel state information in the second reporting implementation manner is used to monitor the first channel state information in the first reporting implementation manner of the first reporting configuration; wherein, the first reporting implementation manner is the implementation manner of the first reporting configuration that is closest to the second reporting implementation manner and is before the time when the channel state information of the second reporting implementation manner is located as a reference resource.

[0220] In some embodiments, the first channel state information includes channel state information at M time points, and the second channel state information includes monitoring information of the channel state information at the M time points, wherein, for each of the M time points, the monitoring information of the channel state information at each time point is determined according to the channel state information at each time point and the measurement result of the nearest reference signal resource in the second reference signal resource, and M is an integer greater than 1.

[0221] In some embodiments, when the monitoring information of the channel state information at Q time points among the M time points corresponds to the same reference signal resource in the second reference signal resource, the second channel state information includes the monitoring information of the channel state information at one time point closest to the same reference signal resource, and does not include the monitoring information of the channel state information at the other Q - 1 time points, where Q is an integer less than or equal to M.

[0222] In some embodiments, the time for the first node to clear the first channel state information from the memory is determined according to the transmission time of the first downlink control signaling, and the first downlink control signaling is used to trigger the first node to transmit the second channel state information to the second node.

[0223] When the transmission time of the first downlink control signaling is before the first node transmits the second channel state information to the second node, the time for the first node to clear the first channel state information from the memory is after the first node transmits the second channel state information to the second node;

[0224] When the transmission time of the first downlink control signaling is after the first node transmits the first channel state information to the second node, the time for the first node to clear the first channel state information from the memory is after the first node transmits the first channel state information to the second node.

[0225] The above mainly introduces the solution provided by the present disclosure from the perspective of the interaction between each node. It can be understood that each node, such as the first node or the second node, includes the corresponding hardware structure and / or software module for implementing each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed in this article, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described function for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0226] Embodiments of the present disclosure can divide the first node or the second node into functional modules according to the above method embodiments. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiments of the present disclosure is illustrative, only a logical function division, and there can be other division methods in actual implementation. The following takes the example of dividing each functional module corresponding to each function for illustration.

[0227] Figure 4 A schematic diagram of the composition of a communication device provided by an embodiment of the present disclosure. As Figure 4 shown, the communication device 30 includes a receiving unit 301, a processing unit 302, and a transmitting unit 303.

[0228] The communication device 30 may be the above-mentioned first node or a chip in the first node. When the communication device 30 is used to implement the functions of the first node in the above embodiment, each unit is specifically used to implement the following functions.

[0229] The receiving unit 301 is configured to receive first configuration information sent by a second node, where the first configuration information includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and the first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, and a carrier where the first reference signal resource is located;

[0230] The processing unit 302 is configured to measure the first reference signal based on the first reporting configuration to obtain first channel state information;

[0231] The transmitting unit 303 is configured to transmit the first channel state information to the second node.

[0232] In some embodiments, the processing unit 302 is further configured to measure a second reference signal based on a second reporting configuration to obtain second channel state information;

[0233] The transmitting unit 303 is further configured to transmit the second channel state information to the second node.

[0234] In some embodiments, the receiving unit 301 is further configured to receive first indication information, where the first indication information is used to indicate one of the following relationships:

[0235] The mapping relationship from the antenna port of the second reference signal resource to the antenna port of the first reference signal resource;

[0236] The mapping relationship from the antenna port of the first reference signal resource to the antenna port of the second reference signal resource.

[0237] In some embodiments, the receiving unit 301 is further configured to receive downlink control information sent by the second node, where the downlink control information is used to trigger a second reporting implementation manner of the second reporting configuration, and the second channel state information in the second reporting implementation manner is used to monitor the first channel state information in the first reporting implementation manner of the first reporting configuration; where the first reporting implementation manner is the implementation manner of the first reporting configuration that is closest to the second reporting implementation manner and is before the time of the reference resource of the channel state information of the second reporting implementation manner.

[0238] Figure 5 It is a schematic diagram of the composition of another communication device provided by an embodiment of the present disclosure. As Figure 5 shown, the communication device 40 includes a sending unit 401 and a receiving unit 402.

[0239] The communication device 40 may be the above-mentioned second node or a chip in the second node. When the communication device 40 is used to implement the functions of the second node in the above embodiments, each unit is specifically used to implement the following functions.

[0240] The sending unit 401 is used to send first configuration information to the first node. The first configuration information includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and the first reporting band of the first channel state information. The first configuration information is used to indicate at least one of the following: the first reference signal resource for carrying the measured first reference signal, and the carrier where the first reference signal resource is located;

[0241] The receiving unit 402 is used to receive the first channel state information sent by the first node.

[0242] It should be noted that Figure 4 and Figure 5 The units in can also be referred to as modules. For example, the sending unit can be referred to as a sending module. In addition, in the embodiments shown in Figure 4 and Figure 5 the names of the units may not be the names shown in the figure. For example, the sending unit can also be referred to as a communication unit, and the receiving unit can also be referred to as a communication unit.

[0243] Figure 4 and Figure 5 If each unit in is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present disclosure, in essence, or the part that contributes to the prior art, or all or 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 causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods of the various embodiments of the present disclosure. The storage media storing the computer software product include: USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs, etc., which can store program codes.

[0244] When the above-mentioned communication device 30 or communication device 40 implements the functions of the above-mentioned integrated module in the form of hardware, the embodiments of the present disclosure provide a structural schematic diagram of a communication device. As Figure 6 shown, the communication device 50 includes: a processor 502, a communication interface 503, and a bus 504. Optionally, the communication device 50 may further include a memory 501.

[0245] The processor 502 may be various exemplary logic blocks, modules, and circuits implemented or executed in combination with the content disclosed in the embodiments of the present disclosure. The processor 502 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in combination with the content disclosed in the embodiments of the present disclosure. The processor 502 may also be a combination that implements a computing function, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0246] The communication interface 503 is used to connect to other devices through a communication network. The communication network may be an Ethernet, a radio access network, a wireless local area network (WLAN), etc.

[0247] The memory 501 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), or other types of dynamic storage devices that can store information and instructions. It may also be an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium, or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0248] As a possible implementation, the memory 501 may exist independently of the processor 502. The memory 501 may be connected to the processor 502 through the bus 504 for storing instructions or program code. When the processor 502 calls and executes the instructions or program code stored in the memory 501, it can implement the method for transmitting channel state information provided by the embodiments of the present disclosure.

[0249] In another possible implementation, the memory 501 may also be integrated with the processor 502.

[0250] The bus 504 can be an extended industry standard architecture (EISA) bus or the like. The bus 504 can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 6 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0251] Through the description of the above embodiments, those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the first node or the second node is divided into different functional modules to complete all or part of the functions described above.

[0252] The embodiments of the present disclosure also provide a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer instructions instructing relevant hardware. The program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The above computer-readable storage medium can also be an external storage device of the above first node or second node, such as a plug-in hard disk equipped on the above first node or second node, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the above computer-readable storage medium can also include both the internal storage unit of the above first node or second node and the external storage device. The above computer-readable storage medium is used to store the above computer program and other programs and data required by the above first node or second node. The above computer-readable storage medium can also be used to temporarily store the data that has been output or will be output.

[0253] The embodiments of the present disclosure also provide a computer program product. The computer product includes a computer program. When the computer program product runs on a computer, the computer is enabled to execute any one of the channel state information transmission methods provided in the above embodiments.

[0254] Although the present disclosure has been described in connection with various embodiments, those skilled in the art will recognize other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single processor or other unit may implement several functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce a favorable effect.

[0255] Although the present disclosure has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the disclosure. Accordingly, the specification and drawings are merely exemplary illustrations of the disclosure defined by the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the disclosure. It is obvious that those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure is also intended to include these modifications and variations.

[0256] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present disclosure should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A method for transmitting channel state information, characterized in that, Applied to a first node, the method includes: Receiving first configuration information sent by a second node, the first configuration information including a first reporting configuration, the first reporting configuration including content that first channel state information should include and a first reporting band of the first channel state information; the first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, a carrier on which the first reference signal resource is located; Measuring the first reference signal based on the first reporting configuration to obtain the first channel state information; Transmitting the first channel state information to the second node.

2. The method according to claim 1, characterized in that, The first configuration information is further used to indicate a carrier on which the first reporting band is located, including at least one of the following: The first configuration information is used to indicate a carrier on which the first reference signal resource is located, and the carrier on which the first reference signal resource is located is used to determine a carrier on which the first reporting band is located; The first configuration information includes indication information for indicating a carrier on which the first reporting band is located; The first configuration information is used to indicate that a carrier on which the first reporting band is located is a carrier on which a downlink control signaling for triggering reporting of the channel state information is located; The first configuration information is used to indicate a carrier on which the first reporting band is located from among candidate carriers.

3. The method according to claim 2, wherein The candidate carriers are determined according to at least one of the following: A frequency domain range width of the first reference signal resource; A code division multiplexing length on the first reference signal resource.

4. The method according to claim 1, wherein By default, a carrier on which the first reporting band is located is a carrier on which a downlink control signaling for triggering reporting of channel state information is located.

5. The method according to claim 1, wherein The first reporting band includes sub-bands, and a size of the sub-bands is determined based on a frequency domain spacing between a carrier on which the first reporting band is located and a carrier on which the first reference signal resource is located.

6. The method according to claim 5, wherein The frequency domain spacing includes any one of the following: A frequency domain position of a carrier on which the first reporting band is located is higher than a frequency domain position of a carrier on which the first reference signal resource is located, and the frequency domain spacing is a frequency domain spacing between a resource block of a lowest frequency of the first reporting band and a resource block of a highest frequency of a frequency domain range where the first reference signal resource is located; or, A frequency domain position of a carrier on which the first reporting band is located is lower than a frequency domain position of a carrier on which the first reference signal resource is located, and the frequency domain spacing is a frequency domain spacing between a resource block of a highest frequency of the first reporting band and a resource block of a lowest frequency of a frequency domain range where the first reference signal resource is located; or, The frequency domain spacing is a frequency domain spacing between a frequency domain center of the first reporting band and a center of a frequency domain range where the first reference signal resource is located.

7. The method according to claim 1, characterized in that, The first reporting band includes sub-bands, and a size of the sub-bands is determined based on a frequency domain range width of the first reference signal resource.

8. The method according to claim 1, characterized in that, The first reference signal includes K reference signals, the K reference signals are respectively carried by K reference signal resources, and the K reference signal resources are respectively located on K carriers; wherein, the K carriers are different from each other, or at least two of the K carriers are the same, and K is a positive integer.

9. The method according to claim 8, wherein The first reporting frequency band includes sub - bands, and the size of the sub - bands is determined based on at least one of the following: The frequency - domain range bandwidth of the reference signal resource closest to the first reporting frequency band; The average of the frequency - domain range widths of the K reference signal resources; The average of the frequency - domain range widths of N reference signal resources among the K reference signal resources, where N is a positive integer less than or equal to K.

10. The method according to claim 9, wherein The N reference signal resources include the N reference signal resources with the largest frequency - domain range widths among the K reference signal resources.

11. The method according to claim 1, characterized in that, The first configuration information further includes a second reporting configuration, the second reporting configuration includes the content that the second channel state information should include and the second reporting frequency band of the second channel state information, and the first configuration information is further used to indicate at least one of the following: the carrier where the second reporting frequency band is located, the second reference signal resource for carrying the measured second reference signal, the carrier where the second reference signal resource is located.

12. The method according to claim 11, wherein The method further includes: Measuring the second reference signal based on the second reporting configuration to obtain the second channel state information; Transmitting the second channel state information to the second node.

13. The method according to claim 11, wherein The second reporting frequency band is different from the first reporting frequency band, and the second reference signal resource is the same as the first reference signal resource.

14. The method according to claim 13, wherein The first channel state information and the second channel state information satisfy at least one of the following: The first channel state information includes the index number of the precoding matrix, and the second channel state information includes an offset value relative to the index number of the precoding matrix in the first channel state information; The channel quality indicator CQI in the second channel state information is determined based on the precoding matrix indicator in the first channel state information; The first channel state information reports the precoding matrix using a first codebook set, and the second channel state information reports the precoding matrix using a second codebook set; where the second codebook set is a subset of the first codebook set, and the number of codebooks in the second codebook set is less than the number of codebooks in the first codebook set.

15. The method according to claim 11, characterized in that, The second reporting frequency band is the same as the first reporting frequency band, or the second reporting frequency band is included in the first reporting frequency band, and the frequency - band range where the second reference signal resource is located includes the second reporting frequency band.

16. The method according to claim 15, wherein The second reporting configuration includes any one of the configuration of the second reference signal resource, the identifier of the configuration of the second reference signal resource, and the identifier of the second reference signal resource; the configuration of the second reference signal resource includes the time offset of the second reference signal resource relative to the first reference signal resource.

17. The method according to claim 15, wherein The second reporting frequency band is determined from the first reporting frequency band.

18. The method according to claim 11, wherein The number of antenna ports of the second reference signal resource is less than or equal to the number of antenna ports of the first reference signal resource; the method further includes: Receiving first indication information, where the first indication information is used to indicate one of the following relationships: The mapping relationship from the antenna ports of the second reference signal resource to the antenna ports of the first reference signal resource; The mapping relationship from the antenna ports of the first reference signal resource to the antenna ports of the second reference signal resource.

19. The method according to claim 11, wherein The method further includes: Receiving downlink control information sent by the second node, where the downlink control information is used to trigger a second reporting implementation manner of the second reporting configuration, and the second channel state information in the second reporting implementation manner is used to monitor the first channel state information in the first reporting implementation manner of the first reporting configuration; where the first reporting implementation manner is the implementation manner of the first reporting configuration that is closest to the second reporting implementation manner and is before the time of the reference resource of the channel state information in the second reporting implementation manner.

20. The method according to claim 11, wherein The first channel state information includes channel state information at M time points, and the second channel state information includes monitoring information of the channel state information at the M time points. Wherein, for each of the M time points, the monitoring information of the channel state information at each time point is determined according to the channel state information at each time point and the measurement result of the reference signal resource closest to the second reference signal resource, and M is an integer greater than 1.

21. The method according to claim 20, characterized in that, When there is monitoring information of the channel state information at Q time points among the M time points corresponding to the same reference signal resource in the second reference signal resource, the second channel state information includes the monitoring information of the channel state information at the time point closest to the same reference signal resource, and does not include the monitoring information of the channel state information at the other Q - 1 time points, where Q is an integer less than or equal to M.

22. The method according to claim 11, wherein The time for the first node to clear the first channel state information from the memory is determined according to the transmission time of the first downlink control signaling, and the first downlink control signaling is used to trigger the first node to transmit the second channel state information to the second node.

23. The method according to claim 22, wherein: Corresponding to the transmission time of the first downlink control signaling being before the first node transmits the second channel state information to the second node, the time for the first node to clear the first channel state information from the memory is after the first node transmits the second channel state information to the second node; Corresponding to the transmission time of the first downlink control signaling being after the first node transmits the first channel state information to the second node, the time for the first node to clear the first channel state information from the memory is after the first node transmits the first channel state information to the second node.

24. A method for transmitting channel state information, characterized in that, Applied to a second node, the method includes: Sending first configuration information to a first node, where the first configuration information includes a first reporting configuration, and the first reporting configuration includes the content that the first channel state information should include and the first reporting frequency band of the first channel state information; the first configuration information is used to indicate at least one of the following: a first reference signal resource for carrying the measured first reference signal, and the carrier on which the first reference signal resource is located; Receiving the first channel state information sent by the first node.

25. A communication device, characterized in that, Including: A memory and a processor; The memory and the processor are coupled; The memory is used to store instructions executable by the processor; When the processor executes the instructions, it executes the method according to any one of claims 1 to 24.

26. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, which, when run on a computer, cause the computer to execute the method according to any one of claims 1 to 24.

27. A computer program product, characterized in that, The computer program product includes computer instructions, which, when run on a computer, cause the computer to execute the method according to any one of claims 1 to 24.

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