Channel state information sending method, channel state information receiving method, apparatus, and storage medium

Abstract

Embodiments of the present disclosure provide a channel state information sending method, a channel state information receiving method, an apparatus, and a storage medium. The method comprises: receiving first control signaling; on the basis of a reference resource indicated by the first control signaling, obtaining first channel state information, the first channel state information indicating at least one piece of the following feedback information: feedback information based on a current transmission resource, and feedback information used for retransmission scheduling; and sending the first channel state information to a second node.

Description

Channel state information sending method, receiving method, device and storage medium

[0001] This disclosure claims priority to Chinese patent application No. 202311656720.9, filed on December 4, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of communication technologies, and in particular to a method for sending, a method for receiving, an apparatus, and a storage medium for channel state information. Background Art

[0003] In the fifth generation mobile communication technology (5th generation mobile networks), user equipment (UE) measures downlink channel information based on the channel-state information reference signal (CSI-RS), obtains channel state information, and then reports the channel state information to the base station. The base station schedules downlink data based on the reported channel state information.

[0004] Summary of the Invention

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

[0006] receiving a first control signaling;

[0007] Obtaining first channel state information based on a reference resource indicated by the first control signaling, where the first channel state information indicates at least one of the following feedback information: feedback information based on a current transmission resource and feedback information for retransmission scheduling;

[0008] The first channel state information is sent to the second node.

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

[0010] Sending a first control signaling;

[0011] Receive first channel state information sent by the first node, where the first channel state information is obtained based on a reference resource indicated by the first control signaling, and the first channel state information indicates at least one of the following feedback information: feedback information based on current transmission resources and feedback information for retransmission scheduling.

[0012] According to a third aspect, a communication device is provided. The device is applied to a first node, and the device includes:

[0013] A receiving unit, configured to receive a first control signaling;

[0014] a processing unit, configured to obtain first channel state information based on a reference resource indicated by the first control signaling, where the first channel state information indicates at least one of the following feedback information: feedback information based on a current transmission resource and feedback information for retransmission scheduling;

[0015] A sending unit is configured to send the first channel state information to the second node.

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

[0017] A sending unit, configured to send a first control signaling;

[0018] A receiving unit is used to receive first channel state information sent by a first node, where the first channel state information is obtained based on a reference resource indicated by a first control signaling, and the first channel state information indicates at least one of the following feedback information: feedback information based on current transmission resources and feedback information for retransmission scheduling.

[0019] In a fifth aspect, a communication device is provided, comprising: 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 or second aspect above.

[0020] In a sixth aspect, a computer-readable storage medium is provided, which stores computer instructions. When the computer instructions are executed on a computer, the computer executes any one of the methods provided in the first aspect or the second aspect.

[0021] In a seventh aspect, a computer program product comprising computer instructions is provided, which, when executed on a computer, enables the computer to execute any one of the methods provided in the first aspect or the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the technical solution 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 solution of the present disclosure and do not constitute a limitation to the technical solution of the present disclosure.

[0023] FIG1 is a schematic diagram of a process of measuring and reporting channel state information provided by an embodiment of the present disclosure.

[0024] FIG2 is a schematic structural diagram of a communication system provided by an embodiment of the present disclosure.

[0025] FIG3 is a schematic flow chart of a method for sending channel state information provided by an embodiment of the present disclosure.

[0026] FIG4 is a schematic diagram of differentiating sub-resources in a time-division manner according to an embodiment of the present disclosure.

[0027] FIG5 is a schematic diagram of differentiating sub-resources in a frequency division manner according to an embodiment of the present disclosure.

[0028] FIG6 is a flow chart of a method for receiving channel state information provided by an embodiment of the present disclosure.

[0029] FIG7 is a schematic diagram of sub-band division provided by an embodiment of the present disclosure.

[0030] FIG8 is a schematic diagram showing the composition of a communication device provided in an embodiment of the present disclosure.

[0031] FIG9 is a schematic diagram showing the composition of another communication device provided in an embodiment of the present disclosure.

[0032] FIG10 is a schematic structural diagram of a communication device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0034] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "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" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0035] The terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this disclosure, unless otherwise specified, "plurality" means two or more.

[0036] In the embodiments of the present disclosure, words such as "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present disclosure should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplarily" or "for example" is intended to present related concepts in some way.

[0037] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0038] Due to channel interference and measurement timeliness, the channel state information (CSI) measured by terminals based on CSI-RS is inaccurate and cannot accurately reflect the channel state. Base stations must rely on conservative downlink data scheduling and frequent retransmissions to correctly complete downlink data transmission. For services such as enhanced mobile broadband (eMBB) and ultra-reliable and low-latency communication (uRLLC) transmitted in 5G systems, retransmissions or conservative scheduling can still be used to support eMBB and uRLLC, as these services have low latency requirements or small data volumes. However, in fifth-generation mobile networks-advanced (5G-A) and sixth-generation mobile networks (6G), large-data-volume, low-latency services, such as augmented reality and metaverse services, exist. If less accurate CSI is still used, resulting in frequent retransmissions and conservative downlink data scheduling, communication system resource utilization will be reduced, data packet transmission will not be possible, and ultimately, communication system capacity will be reduced.

[0039] Taking a next-generation NodeB (gNB) as an example, Figure 1 illustrates a flow chart of channel state information measurement and reporting according to an embodiment of the present disclosure. As shown in Figure 1, channel state information measurement and reporting include four methods. Measurement and reporting method 1 is periodic measurement and reporting. First, the gNB sends radio resource control (RRC) configuration information to the UE. The RRC configuration information is used to configure the CSI resources and CSI reporting method. Upon receiving the RRC configuration information, the UE performs the configuration, which takes effect immediately. After the gNB sends the RRC configuration information to the UE, it periodically sends a CSI-RS to the UE. Upon receiving the CSI-RS, the UE measures the CSI-RS to obtain a CSI report, and then periodically sends the CSI report to the gNB using the physical uplink control channel (PUCCH) resources.

[0040] Measurement and reporting method 2 involves semi-static measurement and reporting. First, the gNB sends RRC configuration information to the UE. This information configures the CSI resources and CSI reporting method. The gNB then sends Media Access Control Element (MAC CE) 1 signaling to the UE. MAC CE1 activates semi-static CSI-RS measurement. The gNB then semi-statically sends CSI-RS to the UE. Finally, the gNB sends MAC CE2 signaling to the UE. MAC CE2 activates semi-static CSI reporting. After receiving MAC CE2 signaling, the UE measures the received semi-static CSI-RS to obtain a CSI report, which it then periodically sends to the gNB using PUCCH resources.

[0041] Measurement and reporting mode 3 involves semi-static measurement and reporting. First, the gNB sends RRC configuration information to the UE, which configures the CSI resources and CSI reporting mode. The gNB then sends MAC CE1 signaling to the UE, activating semi-static CSI-RS measurement. The gNB then sends CSI-RS to the UE semi-statically. Finally, the gNB sends downlink control information (DCI) signaling to the UE, activating semi-static CSI reporting. After receiving the DCI signaling, the UE measures the received semi-static CSI-RS to obtain a CSI report, which it then periodically sends to the gNB using the physical uplink shared channel (PUSCH). The DCI signaling also determines the offset between the DCI signaling sent by the gNB to the UE and the CSI report sent by the UE to the gNB.

[0042] Measurement and reporting mode 4 is dynamic measurement and reporting. First, the gNB sends RRC configuration information to the UE. The RRC configuration information is used to configure the CSI resources and CSI reporting mode. The gNB then sends DCI signaling to the UE. The DCI signaling activates aperiodic CSI-RS measurement and CSI reporting. The gNB then aperiodically sends CSI-RS to the UE. After receiving the aperiodic CSI-RS, the UE measures the received aperiodic CSI-RS to obtain a CSI report, and then aperiodically sends the CSI report to the gNB using PUSCH resources. The DCI signaling is also used to determine the offset between the DCI signaling sent by the gNB to the UE and the CSI-RS sent aperiodically to the UE, as well as the offset between the DCI signaling sent by the gNB to the UE and the CSI report sent by the UE to the gNB.

[0043] As shown in Figure 1 above, the terminal measures the CSI-RS transmitted by the base station to obtain channel state information (CSI), which is then reported to the base station. Because the terminal measures the CSI-RS without considering neighboring cell interference and measurement timeliness, the CSI obtained by the terminal from the CSI-RS is inaccurate and cannot fully reflect the channel state. In 5G-A and 6G systems, if inaccurate CSI is still used, resource utilization of the communication system will be reduced, data packets will not be properly transmitted, and ultimately the communication system capacity will be reduced. Therefore, improving the accuracy of CSI is an urgent problem that needs to be solved.

[0044] Based on this, the embodiments of the present disclosure provide a method for sending, a method for receiving, an apparatus and a storage medium for channel state information. The first node obtains first channel state information based on the reference resources indicated by the first control signaling, and the first channel state information at least indicates feedback information based on the current transmission resources and feedback information for retransmission scheduling, which improves the accuracy of the channel state information, can avoid frequent retransmissions, and improve the resource utilization of the communication system.

[0045] The embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0046] The technical solutions provided in the embodiments of the present disclosure can be applied to various mobile communication networks, for example, new radio (NR) mobile communication networks using fifth-generation mobile communication technology (5G), future mobile communication networks, or multiple communication convergence systems, etc., and the embodiments of the present disclosure are not limited to this.

[0047] The network architecture of 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 6G) in the embodiment of the present disclosure may include network side devices (for example, including but not limited to base stations) and receiving side devices (for example, including but not limited to terminals). And it should be understood that, in this example, in the downlink, the first communication node (also referred to as the first communication node device, the first node) may be a base station side device, and the second communication node (also referred to as the second communication node device, the second node) may be a terminal side device. Of course, 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 the device-to-device communication between the two communication nodes, the first communication node and the second communication node may both be base stations or terminals. The first communication node and the second communication node may be referred to as the first node and the second node, respectively.

[0048] Figure 2 is a schematic diagram of the structure of a communication system provided by an embodiment of the present disclosure. As shown in Figure 2, the communication system includes but is not limited to a first node 110 and a second node 120. The first node 110 and the second node 120 can transmit and receive wireless signals and perform related interactions.

[0049] In a wireless communication scenario, a first node 110 and a second node 120 communicate via a wireless channel. For example, the first node 110 is a terminal and the second node 120 is a base station. The base station and the terminal communicate via a wireless channel. In another example, the first node 110 is a terminal and the second node 120 is a wireless router. The wireless router and the terminal communicate via a wireless channel. In another example, the first node 110 is a first base station and the second node 120 is a second base station. The first and second base stations communicate via a wireless channel. In another example, the first node 110 is a first terminal and the second node 120 is a second terminal. The first and second terminals communicate via a wireless channel. In another example, the first node 110 is a repeater and the second node 120 is a base station. The base station and the repeater communicate via a wireless channel. In another example, the first node 110 is a terminal and the second node 120 is a repeater. The repeater and the terminal communicate via a wireless channel. For another example, the first node 110 is a first relay, the second node 120 is a second relay, and the first relay and the second relay communicate via a wireless channel. For another example, the first node 110 is a base station, the second node 120 is a satellite, and the satellite and the base station communicate via a wireless channel. For another example, the first node 110 is a satellite, the second node 120 is a base station, and the base station and the satellite communicate via a wireless channel. For another example, the first node 110 is a terminal, the second node 120 is a satellite, and the satellite and the terminal communicate via a wireless channel. For another example, the first node 110 is a satellite, the second node 120 is a terminal, and the terminal and the satellite communicate via a wireless channel. For another example, the first node 110 is a ground device, the second node 120 is an aircraft, and the aircraft and the ground device communicate via a wireless channel. For another example, the first node 110 is a first aircraft, the second node 120 is a second aircraft, and the first aircraft and the second aircraft communicate via a wireless channel.

[0050] The "first" node, "second" node, "first" way, "second" way, "first" method, "second" method, "first" matrix, "second" matrix, "first" part, "second" part in this disclosure, unless otherwise specified, are only used for descriptive distinction and do not represent the order of before and after or sequence.

[0051] In some embodiments, the first node and the second node may also have other names. For example, the first node may also be called a first communication node, and the second node may also be called a second communication node, etc. The embodiments of the present disclosure do not limit this.

[0052] In some embodiments, the base station may be any of an evolution nodeB (eNB), a next generation nodeB (gNB), a transmission receive point (TRP), a transmission point (TP), and some other access node. Depending on the size of the service coverage area provided, base stations can be further divided into macro base stations for providing macro cells, micro base stations for providing pico cells, and femto base stations for providing femto cells. With the continuous evolution of wireless communication technology, future base stations may also adopt other names.

[0053] In some embodiments, a terminal is a device with wireless transceiver capabilities that can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons, and satellites, etc.). The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, 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 smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. The embodiments of the present disclosure do not limit the application scenarios. The terminal may also sometimes be referred to as a user, user equipment, access terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal, mobile device, UE terminal, wireless communication device, UE agent, or UE device, etc. The embodiments of the present disclosure are not limited to this.

[0054] It should be understood that FIG2 is an exemplary structural diagram, and the number of devices included in the communication system shown in FIG2 is not limited. For example, the number of first nodes and second nodes is not limited. Furthermore, in addition to the devices shown in FIG2 , the communication system shown in FIG2 may also include other devices, which is not limited.

[0055] Next, as shown in FIG3 , an embodiment of the present disclosure provides a method for transmitting channel state information. The method is applied to a first node, which may be the first node 110 shown in FIG2 . The method may include the following steps:

[0056] S101: Receive a first control signaling.

[0057] In some embodiments, when the second node needs to determine a data transmission strategy with the first node, the second node sends a first control signaling to the first node. Accordingly, the first node receives the first control signaling sent by the second node. The first node receives the first control signaling sent by the second node, which may be the first node receiving a transport block (TB) sent by the second node, the transport block including the first control signaling, or the transport block carrying the first control signaling. The second node may be the second node 120 shown in FIG. 2 above. Exemplarily, the following description takes the first node as a terminal and the second node as a base station as an example.

[0058] In some embodiments, the first control signaling includes at least one of the following:

[0059] First downlink control information DCI signaling;

[0060] First radio resource control (RRC) signaling.

[0061] For example, the first control signaling includes first downlink control information DCI signaling.

[0062] For example, the first downlink control information signaling includes DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 1_0, DCI format 1_1, and DCI format 1_2.

[0063] For example, the first downlink control information signaling includes DCI signaling of the DCI format 2 series.

[0064] For example, the first control signaling includes first radio resource control RRC signaling.

[0065] For example, the first RRC signaling includes RRC signaling for configuring channel state information reporting resources and RRC signaling for configuring reference signal resources used for channel state information measurement, such as CSI-ReportConfig and CSI-ResourceConfig.

[0066] For example, the first control signaling includes first downlink control information DCI signaling and first radio resource control RRC signaling.

[0067] In some embodiments, the first control signaling is used to indicate a reference resource. The reference resource includes at least one of the following: a demodulation reference signal (DMRS); and data transmitted in a physical downlink shared channel (PDSCH).

[0068] For example, the reference resource (or reference signal) includes a demodulation reference signal DMRS.

[0069] For example, the reference resources (or reference signals) include data transmitted in the physical downlink shared channel PDSCH.

[0070] For example, the reference resources (or reference signals) include a demodulation reference signal DMRS and data transmitted in a physical downlink shared channel PDSCH.

[0071] For example, when the reference resource (or reference signal) includes a demodulation reference signal (DMRS), the reference signal resource information is configured through RRC signaling, including: downlink DMRS type information; location information of the DMRS added in downlink transmission; the maximum number of OFDM symbols that can transmit DMRS in the PDSCH; downlink DMRS scrambling initialization information and downlink PTRS (Phase Tracking Reference Signal) information configured by the DMRS. The RRC signaling DMRS-DownlinkConfig is as follows:

[0072] For example, when the reference resource includes data transmitted in PDSCH, the reference signal resource (or reference signal) is configured through DCI signaling, including determining the time domain allocation information of PDSCH through the Time domain resource assignment domain; and determining the frequency domain allocation information of PDSCH through the Frequency domain resource assignment domain.

[0073] S102: Obtain first channel state information based on a reference resource indicated by the first control signaling.

[0074] In some embodiments, after receiving the first control signaling, the first node can obtain the first channel state information based on the reference resources indicated by the first control signaling, that is, measure the data transmitted in the DMRS and / or PDSCH indicated by the first control signaling to obtain the first channel state information.

[0075] In some embodiments, the first channel state information in the embodiments of the present disclosure may also be replaced by a first channel state information report, that is, the first node may obtain the first channel state information report based on the reference resource indicated by the first control signaling.

[0076] It should be noted that the above-mentioned step S101 is an optional step, that is, when the second node pre-indicates the reference resources required for the first node to determine the channel state information, the first node can directly obtain the first channel state information based on the reference resources pre-indicated by the second node, instead of receiving the first control signaling sent by the second node before determining the first channel state information each time.

[0077] In some embodiments, the first channel state information indicates at least one of the following feedback information: feedback information based on current transmission resources and feedback information for retransmission scheduling. The current transmission resources may refer to time domain resources and frequency domain resources allocated by the transmission block carrying the first control signaling sent by the second node. The feedback information for retransmission scheduling may be understood as information re-reported by the first node to the second node after the first node receives the first control signaling sent by the second node and in the event that the first node fails to initially report information to the second node.

[0078] For example, the feedback information based on the current transmission resource refers to the channel state information of the radio resource of the current first-transmitted transmission block. The feedback information is used by the second node to perform the first transmission of the next transmission block.

[0079] As an example, the feedback information based on the current transmission resource may include at least one of the following:

[0080] a difference between a modulation and coding scheme (MCS) level configured by the second node and an MCS level obtained based on the reference resource;

[0081] a difference between a signal-to-noise ratio (SNR) corresponding to the MCS level configured for the second node and an SNR corresponding to the MCS level obtained based on the reference resource;

[0082] Interference strength indication;

[0083] Based on the MCS level measured by the reference resource and a first table, the first table includes a channel quality information (CQI) table or an MCS table;

[0084] Quantized channel state information, wherein the quantized channel state information includes at least one of the following: CQI information; precoding matrix indicator (PMI); rank indicator (RI); layer indicator (LI); SNR information.

[0085] In some embodiments, the MCS level obtained according to the reference resource can be understood as the MCS level obtained by the first node measuring the reference resource.

[0086] In some embodiments, the difference between the MCS level configured by the second node and the MCS level obtained based on the reference resources, the MCS level configured by the second node and the MCS level obtained based on the reference resources can correspond to the same CQI table, and the bit width M (M>0) of the difference is determined by high-level parameters, for example, M=4.

[0087] In some embodiments, the difference between the MCS level configured by the second node and the MCS level obtained based on the reference resource, the MCS level configured by the second node and the MCS level obtained based on the reference resource can correspond to the same MCS table, and the bit width M (M>0) of the difference is determined by high-level parameters, for example, M=5.

[0088] In some embodiments, the difference between the MCS level configured for the second node and the MCS level obtained based on the reference resources may be a specific value of the difference between the MCS level configured for the second node and the MCS level obtained based on the reference resources, or a status value, or an indication value, wherein the status value is used to indicate switching the difference between the MCS level configured for the second node and the MCS level obtained based on the reference resources, and the indication value corresponds to indicating the specific value of the difference between the MCS level configured for the second node and the MCS level obtained based on the reference resources.

[0089] In some embodiments, the indicator value may be a codepoint value.

[0090] For example, assuming that the MCS level configured for the second node is 15 and the MCS level obtained from the reference resource is 10, the difference is 5, which is represented by "110" in binary format. "110" is the specific value of the difference of 5. Alternatively, taking the difference as an indicator value, the correspondence between the Codepoint value and the signal-to-noise ratio difference can be shown in Table 1 below:

[0091] Table 1

[0092] From the above description, we know that the difference is of order 5. Combined with Table 1, we can determine that the Codepoint value '11' is required to represent the difference of order 5. In Table 1, Delta SNR represents the signal-to-noise ratio difference.

[0093] In some embodiments, the difference between the SNR corresponding to the MCS level configured for the second node and the SNR corresponding to the MCS level obtained based on the reference resource may also include a specific value, a status value, and an indication value. For a description of the specific value, status value, and indication value of the difference between the SNR corresponding to the MCS level configured for the second node and the SNR corresponding to the MCS level obtained based on the reference resource, reference may be made to the above description of the specific value, status value, and indication value of the difference between the MCS level configured for the second node and the MCS level obtained based on the reference resource, and is not further described here.

[0094] In some embodiments, the difference between the SNR corresponding to the MCS level configured for the second node and the SNR corresponding to the MCS level obtained based on the reference resource is used to adjust the SNR step size. For example, the difference is the SNR adjustment step size when the first node provides feedback that the transmission block currently transmitted by the second node is correctly transmitted (acknowledgement, ACK), or the difference is the SNR adjustment step size when the first node provides feedback that the transmission block currently transmitted by the second node is incorrectly transmitted (negative acknowledgment, NACK).

[0095] In some embodiments, the feedback information based on the current transmission resource includes a difference between a modulation and coding scheme MCS level configured by the second node and an MCS level obtained by measuring the reference signal.

[0096] In one embodiment, the MCS level difference is the MCS level configured by the second node minus the MCS level obtained based on the reference resource, and the two MCS levels correspond to the same channel quality information CQI table. The bit width M of the difference is determined by a high-level parameter, where M is a positive integer greater than 0.

[0097] As an embodiment, the MCS level difference is the MCS level configured by the second node minus the MCS level obtained according to the reference resource, and the two MCS levels correspond to the same MCS table. The bit width M of the difference is determined by a high-level parameter, where M is a positive integer greater than 0.

[0098] In some embodiments, the fed-back MCS difference is fed back based on the frequency domain bandwidth of the currently scheduled transport block.

[0099] In some embodiments, a specific value of the MCS difference is fed back based on feedback information of the current transmission resource.

[0100] For example, the base station configures an MCS level of 15, and the MCS level measured from the reference signal (based on the reference resource) is 10. The fed-back MCS difference is 15-10=5. If the MCS levels correspond to the same channel quality information (CQI) table, the bit width of the feedback information is M=4 bits, determined by higher-layer parameters and related to the maximum number of indexes in the CQI table. Therefore, the final feedback information is the fed-back MCS difference converted to binary after 5th order, i.e., the feedback content is "0101."

[0101] In some embodiments, the MCS difference value fed back based on the feedback information of the current transmission resource is represented by an indicator value, where one indicator value corresponds to a specific value indicating the multiple feedback information.

[0102] For example, there is a mapping relationship as shown in Table 2 below.

[0103] Table 2

[0104] In Table 2, M1 represents the maximum number of indices corresponding to the CQI table / MCS table. An indicator value of '00' corresponds to an MCS level difference range of [-M1, 2]. An indicator value of '01' corresponds to an MCS level difference range of [-2, 0]. An indicator value of '10' corresponds to an MCS level difference range of [0, 3]. An indicator value of '11' corresponds to an MCS level difference range of [3, M1].

[0105] In conjunction with the above Table 2, if the fed-back MCS difference is level 5, the final feedback information is an indication value within the range of level 5, ie, feedback '11'.

[0106] In some embodiments, the feedback information based on the current transmission resource includes a difference between a signal-to-noise ratio (SNR) corresponding to the MCS level configured by the second node and an SNR corresponding to the MCS level obtained according to a reference resource (measurement reference signal).

[0107] For example, the SNR difference is the difference between the SNR corresponding to the MCS level configured by the base station and the SNR corresponding to the MCS level obtained according to the reference resource (measurement reference signal).

[0108] For example, the SNR difference is a quantized SNR offset.

[0109] As an example, the fed-back SNR difference is fed back based on the frequency domain bandwidth of the currently scheduled transport block.

[0110] As an example, the fed-back SNR difference is fed back based on the entire transmission bandwidth where the currently scheduled transmission block is located.

[0111] In some embodiments, the feedback information based on the current transmission resource is fed back as an indicator value of the SNR difference. The indicator value is used to quantify the SNR. The indicator value can also be used to select an SNR offset.

[0112] For example, the indicator value is used to quantify the SNR, and there is a mapping relationship as shown in Table 3 below.

[0113] Table 3

[0114] The indicator value '00' corresponds to an SNR difference in the range of (-Inf, 2). The indicator value '01' corresponds to an SNR difference in the range of [-2, 0). The indicator value '10' corresponds to an SNR difference in the range of [0, 1). The indicator value '11' corresponds to an SNR difference in the range of [1, Inf). Inf represents infinity.

[0115] If the fed-back SNR difference is 0.5 dB, the feedback indication value is '10'.

[0116] For example, the indication value is used to select the SNR offset, and there is a mapping relationship as shown in Table 4 below.

[0117] Table 4

[0118] The SNR offset represents the adjustment step size for outer loop link adaptation (OLLA) in the second node. For example, the SNR offset represents the SNR adjustment step size for OLLA when a transport block is correctly transmitted (acknowledged, ACK). Alternatively, the SNR offset represents the SNR adjustment step size for OLLA when a transport block is incorrectly transmitted (non-acknowledged, NACK). If the feedback SNR difference is 0.5 dB, the feedback value is '10'. Upon receiving the indication value '10', the second node adopts -0.2 as the adjustment step size for the OLLA mechanism.

[0119] In some embodiments, the interference intensity indication corresponds to subband interference information and / or broadband interference information. When the feedback information based on the current transmission resource includes the interference intensity indication, the feedback information may also include information about resources whose interference intensity is below a first threshold, and interference intensity information about resources whose interference intensity is below the first threshold. The first threshold may be preconfigured or configured by the second node, and the first threshold is related to the interference intensity.

[0120] In some embodiments, the feedback information based on the current transmission resource includes an interference strength indication.

[0121] In some embodiments, the interference strength indication is represented by a signal to interference and noise ratio.

[0122] In some embodiments, the interference strength indication is represented by a received power magnitude.

[0123] In some embodiments, the interference strength indicator is represented by reference signaling receiving power (RSRP).

[0124] In some embodiments, the interference strength indication is represented by reference signal receiving quality (RSRQ).

[0125] As an embodiment, the fed-back interference strength indication is fed back based on the frequency domain bandwidth of the currently scheduled transport block.

[0126] As an embodiment, the fed-back interference strength indication is fed back based on the transmission bandwidth where the currently scheduled transmission block is located.

[0127] As an embodiment, the fed-back interference intensity indication is fed back based on a portion of the frequency domain bandwidth of the currently scheduled transport block.

[0128] As an embodiment, the fed-back interference intensity indication is fed back based on a portion of the frequency domain bandwidth in the transmission bandwidth where the currently scheduled transmission block is located.

[0129] For example, part of the frequency domain bandwidth includes one or more resource blocks (RBs).

[0130] For example, a portion of the frequency domain bandwidth includes one or more resource block groups. The resource block group includes a predefined number of RBs, and the predefined number of RBs is related to the size of the transmission bandwidth.

[0131] Specifically, one resource block group is one subband.

[0132] For example, the bandwidth allocated to the UE includes a total of 273 RBs. The frequency domain bandwidth of the currently scheduled transport block is 100 RBs. Based on the frequency domain bandwidth of the currently scheduled transport block being 100 RBs and the transmission bandwidth of the currently scheduled transport block being 273 RBs, the feedback interference strength indicator can provide an interference strength indicator for each RB, or an average interference strength indicator for all RBs.

[0133] Assuming that 16 RBs are grouped as a resource block group (subband) (the 17th resource block group contains 17 RBs), the feedback interference strength indication can be based on each resource block group to feed back an interference strength indication; or the feedback interference strength indication can be based on all resource block groups to feed back an average interference strength indication.

[0134] As an embodiment, the first control signaling configures a first threshold, and the first threshold is related to the interference intensity.

[0135] For example, when the interference intensity is greater than the first threshold, resource information corresponding to the interference intensity is fed back, including time domain allocation information, frequency domain allocation information or resource block group index information of the corresponding resource.

[0136] As an embodiment, a specific value of the interference intensity is fed back based on the feedback information of the current transmission resource. For example, resource information whose interference intensity is greater than a threshold is fed back.

[0137] As an embodiment, an indication value of interference intensity is fed back based on feedback information of the current transmission resource.

[0138] For example, there is a mapping relationship as shown in Table 5 below.

[0139] Table 5

[0140] The indicator value '00' corresponds to an RSRP range of (-Inf, 2). The indicator value '01' corresponds to an RSRP range of [-2, 0). The indicator value '10' corresponds to an RSRP range of [0, 1). The indicator value '11' corresponds to an RSRP range of [1, Inf]. Inf represents infinity.

[0141] If the fed-back RSRP is 0.5 dB, the feedback indication value is '10'.

[0142] In some embodiments, when the feedback information based on the current transmission resource includes the MCS level obtained according to the reference resource and the first table, the MCS level obtained according to the reference resource included in the feedback information can be the index value corresponding to the MCS level obtained according to the reference resource in the CQI table / MCS table, and the first table included in the feedback information can be the index number of the first table, that is, the feedback information includes the index number of the CQI table or the index number of the MCS table.

[0143] In some embodiments, the feedback information based on the current transmission resource includes an MCS level and CQI table / MCS table information obtained according to a reference resource (the reference signal is measured).

[0144] As an embodiment, the feedback content includes a predefined index value of a CQI table / MCS table and a certain MCS level therein.

[0145] As an embodiment, the feedback content is fed back based on the frequency domain bandwidth of the currently scheduled transmission block.

[0146] In one embodiment, the feedback content is fed back based on the transmission bandwidth of the currently scheduled transmission block.

[0147] In one embodiment, the feedback content is fed back based on a portion of the frequency domain bandwidth of the currently scheduled transmission block.

[0148] In one embodiment, the feedback content is fed back based on a portion of the frequency domain bandwidth in the transmission bandwidth where the currently scheduled transmission block is located.

[0149] For example, part of the frequency domain bandwidth includes one or more resource blocks (RBs).

[0150] For example, a portion of the frequency domain bandwidth includes one or more resource block groups. The resource block group includes a predefined number of RBs, and the predefined number of RBs is related to the size of the transmission bandwidth.

[0151] Specifically, one resource block group is one subband.

[0152] For example, there is a mapping relationship as shown in Table 6 below.

[0153] Table 6

[0154] Each table contains 32 MCS levels. Based on the reference signal measurement, MCS table 2 and the 15th MCS level are selected. The feedback is '0101111', where the first two bits, '01', indicate the selection of MCS table 2, and the last five bits, '01111', indicate the selection of MCS level 15 in the table.

[0155] In some embodiments, the feedback is for the frequency domain bandwidth of the currently scheduled transport block, that is, a single MCS table index and MCS level information are fed back. For example, there is a mapping relationship as shown in Table 7 below.

[0156] Table 7

[0157] In some embodiments, feedback is provided for a portion of the frequency domain bandwidth of the currently scheduled transport block, i.e., a single MCS table index and multiple MCS level information are provided, where each MCS level information corresponds to a portion of the frequency domain bandwidth. For example, a mapping relationship is provided as shown in Table 8 below.

[0158] Table 8

[0159] Therefore, the feedback information is as shown in Table 9 below:

[0160] Table 9

[0161] In some embodiments, the SNR may be, for example, a signal to interference plus noise ratio (SIN). The SNR information may be an SNR at the time of measurement of the first channel state information, or may be a quantized value of the SNR at the time of measurement of the first channel state information. The bit width of the quantized value is determined by the number of quantized states of the first channel state information.

[0162] In some embodiments, the feedback information includes a state value used to switch the feedback information indicated by the first channel state information.

[0163] As one embodiment, the state value is used to switch whether the feedback information indicated by the first state information is based on the frequency domain bandwidth of the currently scheduled transport block or based on a partial bandwidth of the frequency domain bandwidth of the currently scheduled transport block.

[0164] As one embodiment, the feedback information indicated by the state value used to switch the first state information is one of the feedback information mentioned above, and the state value corresponds to the type of the feedback information mentioned above.

[0165] In some embodiments, the feedback information based on the current transmission resource includes quantized channel state information, including one or more of the following: CQI information; precoding matrix indicator; rank indicator; layer indicator; SNR information.

[0166] As an embodiment, the quantized channel state information is obtained based on the reference resource DMRS signal.

[0167] As an embodiment, the quantized channel state information is obtained based on data transmitted by the reference resource PDSCH.

[0168] As an embodiment, the quantized channel state information is obtained based on the reference resource DMRS signal and the CSIRS reference resource.

[0169] For example, initial quantized channel state information is obtained based on the CSI-RS reference resource (reference signal) closest to the reference resource, and then precise quantized channel state information is obtained based on the reference resource DMRS signal. Then, the difference in quantized channel state information is calculated based on the initial quantized channel state information and the precise quantized channel state information. By feeding back the difference, the second node obtains precise channel state information.

[0170] In some embodiments, the fed-back quantized channel state information is fed back based on a portion of the frequency domain bandwidth of the scheduled transport block.

[0171] For example, the partial bandwidth includes multiple resource block groups, where one resource block group includes multiple resource blocks. For example, one resource block group is a subband.

[0172] Quantized channel state information feedback is performed for the K resource block groups with the worst current channel state information, where K is a positive integer greater than 0.

[0173] In some embodiments, the quantized channel state information is jointly determined based on a reference resource indicated by the first control signaling and a reference resource of a channel state information-reference signal (CSI-RS).

[0174] In some embodiments, the feedback information used for retransmission scheduling includes at least one of the following:

[0175] MCS level for retransmission;

[0176] Retransmitted beam information;

[0177] CQI table or MCS table used for retransmission;

[0178] The SNR of the retransmission;

[0179] a difference between the MCS level configured for the second node and the MCS level obtained based on the reference resource;

[0180] A difference between an SNR corresponding to the MCS level configured by the second node and an SNR corresponding to the MCS level obtained according to the reference resource;

[0181] The subband ratio corresponding to erroneous bits in the PDSCH transmitted by the second node.

[0182] In some embodiments, the MCS level of the retransmission included in the feedback information for retransmission scheduling may be an index value corresponding to the MCS level of the retransmission in a CQI table or an MCS table.

[0183] As an embodiment, the MCS level of the retransmission is obtained according to the reference resource (measurement reference signal).

[0184] In some embodiments, the retransmitted beam information may be retransmitted precoding information, and the retransmitted beam information includes at least one of the following: a retransmitted PMI value, and a retransmitted beam index value.

[0185] As an embodiment, the retransmitted beam information is obtained based on a reference resource (measurement reference signal).

[0186] In some embodiments, the CQI table or MCS table used for retransmission included in the feedback information for retransmission scheduling may be an index number of a CQI table or an index number of an MCS table.

[0187] As an embodiment, the CQI table or MCS table used for retransmission is obtained according to a reference resource (measurement reference signal).

[0188] In some embodiments, the reference resource indicated by the first control signaling sent by the second node also includes DMRS, and the retransmitted SNR amount can be the SNR amount obtained by measuring the DMRS in the reference resource indicated by the first control signaling sent by the second node or the data in the first control instruction.

[0189] For the description of the difference between the MCS level configured by the second node and the MCS level obtained according to the reference resource, and the difference between the SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource, reference can be made to the above description of the difference between the MCS level configured by the second node and the MCS level obtained according to the reference resource, and the difference between the SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource, which will not be repeated here. In some embodiments, the difference between the SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource may be an SNR offset value between the SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource.

[0190] In some embodiments, the subband ratio corresponding to the erroneous bits in the PDSCH transmitted by the second node includes at least one of the following:

[0191] The subband index corresponding to the erroneous bit, expressed as a percentage or decimal;

[0192] The subband group index corresponding to the erroneous bit.

[0193] A subband includes a preconfigured number of resource blocks, or a subband is a resource block group. A subband group includes one or more consecutive subbands, and the subband group index is numbered starting from the subband group containing the smallest subband, and the numbering method can be ascending numbering.

[0194] In some embodiments, the number of subbands included in a subband group is determined by higher-level parameters. For example, the higher-level parameters directly configure the number of subbands included in the subband group, or the number of subbands included in a subband group is determined by mapping the number of resource blocks included in the bandwidth to the total number of subbands.

[0195] In some embodiments, the number of subband groups is determined by higher-level parameters. For example, the higher-level parameters directly configure the number of subband groups, or the number of subband groups is determined by mapping the number of resource blocks included in the bandwidth to the total number of subbands.

[0196] The above embodiment is an exemplary description of the feedback information included in the first channel state information. In some embodiments, the resource corresponding to the feedback information included in the first channel state information includes at least one of the following:

[0197] The entire transmission bandwidth;

[0198] Partial transmission bandwidth;

[0199] The frequency domain bandwidth of the current schedule;

[0200] Part of the bandwidth in the currently scheduled frequency domain bandwidth.

[0201] The entire transmission bandwidth includes all resource blocks in a bandwidth part (BWP), for example, a wideband CSI report. The partial transmission bandwidth includes some resource blocks in the BWP, for example, the partial transmission bandwidth includes at least one of the following: all subbands in the BWP, each subband including a preconfigured number of RB resources; predefined subbands in the BWP; and the optimal subband in the BWP, where the optimal subband in the BWP includes at least one of the following: a subband with the best channel quality, a subband with the smallest subband size, or a subband with the lowest noise.

[0202] The portion of the bandwidth in the currently scheduled frequency domain bandwidth includes at least one of the following: all subbands in the currently scheduled frequency domain bandwidth, predefined subbands in the currently scheduled frequency domain bandwidth, and the optimal subband in the currently scheduled frequency domain bandwidth. The optimal subband in the currently scheduled frequency domain bandwidth includes at least one of the following: a subband with the best channel quality, a subband with the smallest subband size, and a subband with the least noise.

[0203] In some embodiments, the first channel state information includes the information form of the content fed back by the above feedback information, that is, the first channel state information includes at least one of the following:

[0204] a specific value of the feedback information indicated by the first channel state information;

[0205] a state value, where the state value is used to switch feedback information indicated by the first channel state information;

[0206] Indication value, one indication value corresponds to a specific value of one or more feedback information indicated by the first channel state information. As can be seen from the above description, the indication value can be a Codepoint value, and one indication value can correspond to one specific value, or multiple specific values / a specific value range.

[0207] The above embodiment is an exemplary description of the content included in the first channel state information. The following is an exemplary description of the sending method of the first channel state information.

[0208] In some embodiments, the resource information for sending the first channel state information includes at least one of the following:

[0209] Physical uplink control channel PUCCH; physical uplink shared channel PUSCH. That is, the first node can send the first channel state information based on the PUCCH, can also send the first channel state information based on the PUSCH, or can also send the first channel state information based on the PUCCH and PUSCH.

[0210] As an example, when the first node sends the first channel state information based on the PUCCH, the first node may send the first channel state information and hybrid automatic repeat request acknowledgement (HARQ-ACK) information on the same PUCCH. As an example, the first channel state information and the HARQ-ACK information are sent in the same PUCCH using at least one of the following transmission methods:

[0211] Method 1: The first channel state information is concatenated with the HARQ-ACK information and sent through the PUCCH.

[0212] The first channel state information is concatenated with the HARQ-ACK information, which can be understood as concatenating the first channel state information with the HARQ-ACK information and then performing channel coding.

[0213] Exemplarily, the first channel state information is spliced ​​with the HARQ-ACK information, and the HARQ-ACK information may be in front and the first channel state information follows the HARQ-ACK information, or the HARQ-ACK information may be in the back and the first channel state information follows the HARQ-ACK information.

[0214] For example, after the first channel state information and HARQ-ACK information of a transport block of a current transmission resource are concatenated, the first channel state information and HARQ-ACK information of transport blocks of different transmission resources form a codebook.

[0215] For example, there are a total of three transport blocks that need to be fed back on the current PUCCH resource. The feedback content includes 1 bit of HARQ-ACK information and 3 bits of first channel state information. The HARQ-ACK information and the first channel state information of each transport block are first spliced ​​(cascaded). In the 4-bit information, the highest bit represents the HARQ-ACK information, and the low-order 3 bits represent the first channel state information. Then, the feedback information of the three transport blocks is combined into a codebook, which includes 12 bits. From the highest bit to the lowest bit, the first bit to the fourth bit represent the HARQ-ACK information and the first channel state information of transport block 1. The fifth bit to the eighth bit represent the HARQ-ACK information and the first channel state information of transport block 2. The ninth bit to the twelfth bit represent the HARQ-ACK information and the first channel state information of transport block 3.

[0216] In some embodiments, the HARQ-ACK information of the transport block including the first channel state information sent by the first node to the second node is not included in the codebook of the HARQ-ACK information.

[0217] Mode 2: The codebook of the first channel state information and the codebook of the HARQ-ACK information are concatenated and sent through the PUCCH.

[0218] The codebook of the first channel state information is concatenated with the codebook of the HARQ-ACK information, which can be understood as connecting the codebook of the first channel state information with the codebook of the HARQ-ACK information, and then performing channel coding.

[0219] Exemplarily, the codebook of the first channel state information is spliced ​​with the codebook of the HARQ-ACK information, and the codebook of the HARQ-ACK information may be in front, and the codebook of the first channel state information may be connected after the HARQ-ACK information, or the codebook of the HARQ-ACK information may be in the back, and the codebook of the first channel state information may be connected before the codebook of the HARQ-ACK information.

[0220] In some embodiments, the order of transport blocks used to feedback HARQ-ACK information in the codebook of HARQ-ACK information is the same as the order of transport blocks used to feedback the first channel state information in the codebook of the first channel state information.

[0221] For example, the codebook of the first channel state information includes first channel state information of transmission resources corresponding to one or more transmission blocks.

[0222] For example, there are three transport blocks that need to be fed back on the current PUCCH resource. The feedback content includes 1 bit of HARQ-ACK information and 3 bits of first channel state information. The HARQ-ACK codebook feeds back the transmission status of the three transport blocks, and the 3 bits correspond to the HARQ-ACK information of transport block 1, transport block 2, and transport block 3 from high to low. The first channel state information codebook includes the first channel state information of the transmission resources corresponding to the three transport blocks, and 9 bits correspond to the first channel state information of the transmission resources corresponding to transport block 1, transport block 2, and transport block 3. Among them, from high bit to low bit, the first bit to the third bit represent the first channel state information of transport block 1, the fourth bit to the sixth bit represent the first channel state information of transport block 2, and the seventh bit to the ninth bit represent the first channel state information of transport block 3. Finally, the HARQ-ACK codebook and the first channel state information codebook are spliced ​​(cascaded) to generate a 12-bit information sequence.

[0223] In some embodiments, the codebook of the first channel state information only contains transport blocks used to feedback NACK information in the codebook of the HARQ-ACK information. The transport blocks are used to feedback the first channel state information, and the order of the transport blocks in the codebook of the first channel state information is the same as the order of the transport blocks used to feedback NACK in the codebook of the HARQ-ACK information.

[0224] In some embodiments, the codebook of the first channel state information only contains transport blocks used to feedback ACK in the codebook of the HARQ-ACK information. The transport blocks are used to feedback the first channel state information, and the order of the transport blocks in the first channel state information is the same as the order of the transport blocks used to feedback NACK information in the codebook of the HARQ-ACK information.

[0225] Mode 3: Send HARQ-ACK information through PUCCH, and the codebook of the HARQ-ACK information includes the first channel state information.

[0226] The codebook of the HARQ-ACK information includes the first channel state information, which can be understood as the 1 bit in the codebook of the HARQ-ACK information originally used to feedback whether the transmission block is correct or incorrect is extended to carry the first channel state information.

[0227] For example, the original 1-bit information used to feedback whether the transport block is transmitted correctly or incorrectly is expanded to 3 bits to carry the first channel state information. For example, '111' indicates that the transport block is transmitted correctly, and other indication states represent the corresponding first channel state information.

[0228] As another example, when the first node sends the first channel state information based on PUCCH, the first node may send the first channel state information and HARQ-ACK information based on different PUCCHs, that is, the PUCCH used to send the first channel state information and the PUCCH used to send the HARQ-ACK information are configured separately.

[0229] In some embodiments, the order of reference resources for first channel state information feedback is the same as the order of reference resources for HARQ-ACK information feedback, wherein, in the PUCCH used to send the first channel state information, different reference resources are distinguished by time division or frequency division to obtain the first channel state information. The following example illustrates distinguishing different reference resources by time division or frequency division to obtain the first channel state information.

[0230] Example 1: Different reference resources are distinguished by time division to obtain first channel state information.

[0231] In some embodiments, the reference resources of the first channel state information are paired with the reference resources of the HARQ-ACK information, and the reference resources of the first channel state information and the reference resources of the HARQ-ACK information are distinguished by time division to obtain the first channel state information.

[0232] As an example, the reference resource of the first channel state information is used in pair with the reference resource of the HARQ-ACK information, and the codebook resource of the first channel state information may be used in pair with the codebook resource of the HARQ-ACK information. The codebook resource of the first channel state information includes one or more sub-resources, each sub-resource corresponding to the reference resource of the first channel state information of a transmission block. For example, as shown in FIG4 , the sub-resources are distinguished in a time-division manner, and the arrangement order of the sub-resources is the same as the order of the feedback transmission blocks in the HARQ-ACK information. For another example, as shown in FIG5 , the sub-resources are distinguished in a frequency-division manner, and the arrangement order of the sub-resources is the same as the order of the feedback transmission blocks in the HARQ-ACK information. The first CSI in FIG4 and FIG5 is the first channel state information.

[0233] In some embodiments, the transport block corresponding to one sub-resource includes a transport block for feedback NACK information in a codebook of HARQ-ACK information;

[0234] In some embodiments, the transport block corresponding to one sub-resource includes a transport block for feeding back ACK information in a codebook of HARQ-ACK information.

[0235] Example 2: Different reference resources are distinguished by frequency division to obtain first channel state information.

[0236] In some embodiments, the reference resources of the first channel state information are paired with the reference resources of the HARQ-ACK information, and the reference resources of the first channel state information and the reference resources of the HARQ-ACK information are distinguished by frequency division to obtain the first channel state information.

[0237] As an example, the reference resource of the first channel state information is paired with the reference resource of the HARQ-ACK information, and the codebook resource of the first channel state information can be paired with the codebook resource of the HARQ-ACK information. The codebook resource of the first channel state information includes one or more sub-resources, each sub-resource corresponds to the reference resource of the first channel state information of a transport block, the sub-resources are distinguished in a time-division manner, and the arrangement order of the sub-resources is the same as the order of the feedback transport blocks in the HARQ-ACK information. Alternatively, the sub-resources are distinguished in a frequency-division manner, and the arrangement order of the sub-resources is the same as the order of the feedback transport blocks in the HARQ-ACK information.

[0238] In some embodiments, the transport block corresponding to one sub-resource includes a transport block for feedback NACK information in a codebook of HARQ-ACK information;

[0239] In some embodiments, the transport block corresponding to one sub-resource includes a transport block for feeding back ACK information in a codebook of HARQ-ACK information.

[0240] The above embodiments are illustrated by taking the example that the first node sends the first channel state information and the HARQ-ACK information respectively based on different PUCCHs, that is, the PUCCH used to send the first channel state information and the PUCCH used to send the HARQ-ACK information are independent of each other. In some embodiments, when the first node sends the first channel state information and the HARQ-ACK information respectively based on different PUCCHs, when the first node monitors that the PUCCH used to send the first channel state information and the PUCCH used to send the HARQ-ACK information overlap, the first node merges the PUCCH used to send the first channel state information and the PUCCH used to send the HARQ-ACK information, and sends the first channel state information and HARQ-ACK information based on the merged PUCCH.

[0241] In some embodiments, the PUCCH used by the first node to send the first channel state information can be determined based on at least one of the following: DCI signaling, RRC signaling. That is, when the second node needs the first node to report channel state information, the second node can send DCI signaling and / or RRC signaling to the first node, and the DCI signaling and / or RRC signaling are used to determine the PUCCH used by the first node to send the first channel state information. In some embodiments, the second node can send DCI signaling and / or RRC signaling to the first node, and it can be that the second node sends control signaling to the first node, and the control signaling includes the DCI signaling and / or RRC signaling. The control signaling can be the above-mentioned first control signaling, or it can be a signaling other than the first control signaling, and the embodiments of the present disclosure are not limited to this.

[0242] The above embodiment is described by taking the first node sending the first channel state information through the PUCCH as an example. In some embodiments, when the first node sends the first channel state information through the PUSCH, the beta offset value used by the first channel state information is the same as the beta offset value used by the HARQ-ACK information, or the beta offset value used by the first channel state information is the beta offset value corresponding to the first channel state information. Wherein, when the beta offset value used by the first channel state information is the beta offset value corresponding to the first channel state information, the beta offset value may be configured through a high-layer parameter, or the table used by the beta offset value is the same as the table used for the beta offset value of the HARQ-ACK information.

[0243] In some embodiments, when the first node sends the first channel state information through the PUSCH, the time domain starting mapping position of the first channel state information on the PUSCH includes at least one of the following:

[0244] The first symbol of PUSCH;

[0245] The first symbol after the first demodulation reference signal DRMS ​​symbol of the PUSCH.

[0246] As an example, the above example may also be that when the first node sends the first channel state information and HARQ-ACK information respectively through different PUSCHs, the first channel state information includes at least one of the above items at the time domain starting mapping position of the PUSCH.

[0247] In some embodiments, the mapping position of the first channel state information on the PUSCH is related to the physical layer priority of uplink control information (UCI) signaling. The UCI signaling is UCI signaling including the first channel state information.

[0248] In some embodiments, the physical layer priority of the first channel state information is determined based on at least one of the following: the physical layer priority of the HARQ-ACK information; the physical layer priority of the second channel state information; and the physical layer priority indicated by the first control signaling.

[0249] In the case where the physical layer priority of the first channel state information is determined based on the priority of the physical layer priority of the HARQ-ACK information, the physical layer priority of the first channel state information may be the same as the physical layer priority of the HARQ-ACK information. In the case where the physical layer priority of the first channel state information is determined based on the physical layer priority indicated by the first control signaling, the physical layer priority of the first channel state information may be the same as the physical layer priority indicated by the first control signaling. Alternatively, the first control signaling indicates a physical layer priority, and the physical layer priority may be used as the physical layer priority of the first channel state information. The second channel state information is the channel state information included in the UCI signaling in the existing communication protocol. The second channel state information may be referred to as existing channel state information, and the first channel state information may be referred to as precise channel state information. In the case where the physical layer priority of the first channel state information is determined based on the physical layer priority of the second channel state information, the physical layer priority of the first channel state information may be the same as the physical layer priority of the second channel state information.

[0250] As a possible example, the physical layer priority of the first channel state information may also be determined based on higher layer parameters.

[0251] S103: Send first channel state information to the second node.

[0252] In some embodiments, after the first node obtains the first channel state information based on the reference resource, the first node may send the first channel state information to the second node. It should be noted that in the embodiments of the present disclosure, sending may also be replaced by transmitting, reporting, etc.

[0253] As an example, the first node sends the first channel state information to the second node, and the first channel state information may be sent to the second node through UCI signaling.

[0254] As an example, the first channel state information is sent to the second node through the first UCI signaling, and the UCI signaling may include HARQ-ACK information, and the HARQ-ACK information includes the first channel state information.

[0255] As another example, the first channel state information is sent to the second node through the first UCI signaling, or the first UCI signaling includes the second channel state information, and the second channel state information includes the first channel state information.

[0256] As another example, the UCI signaling is a newly defined UCI signaling, that is, the first UCI signaling is a signaling other than UCI-1 signaling, UCI-2 signaling, UCI-3 signaling, and UCI-4 signaling, for example, the first UCI signaling is extended channel state information (eCSI).

[0257] In some embodiments, sending the first channel state information to the second node may include sending the first channel state information to the second node when a preset condition is satisfied, where the preset condition includes at least one of the following: the first node receives second control signaling; the first node executes a predefined transmission behavior; or the first node receives predefined service identification information. The second control signaling is used to instruct the first node to send the first channel state information. The second control signaling may be the same control signaling as the first control signaling, or the second control signaling may be a control signaling other than the first control signaling.

[0258] As an example, the second control signaling includes RRC signaling, where the RRC signaling is used to configure configuration information of the first channel state information, where the configuration information of the first channel state information includes at least one of the following parameters: a reporting type of the first channel state information; a time domain configuration and / or a frequency domain configuration of the first channel state information; and a reference resource corresponding to the first channel state information. The frequency domain configuration of the first channel state information is used to indicate whether the first channel state information is wideband-based or subband-based.

[0259] As an example, the reporting type of the first channel state information is used to determine feedback information based on current transmission resources or feedback information based on retransmission scheduling;

[0260] As an example, the reporting type of the first channel state information is used to determine which type to use for feedback information based on current transmission resources;

[0261] As an example, the reporting type of the first channel state information is used to determine which type of feedback information based on retransmission scheduling is used;

[0262] For example, the reporting type of the first channel state information is determined by the parameter reportQuantity in the RRC signaling CSI-ReportConfig (CSI-report configuration).

[0263] As an example, the frequency domain configuration of the first channel state information is used to configure frequency domain resource information for transmitting the first channel state information.

[0264] For example, the frequency domain configuration of the first channel state information is determined by the parameter reportFreqConfiguration (report frequency configuration) in the RRC signaling CSI-ReportConfig.

[0265] As an example, the time domain configuration of the first channel state information is used to configure time domain resource information for transmission of the first channel state information, including symbol occupancy of the resource in a time slot, and resource period and offset information.

[0266] As an example, the reference resource corresponding to the first channel state information is used to configure which reference resource the first channel state information content is associated with.

[0267] In some embodiments, the reference resource corresponding to the first channel state information may include more than one type of reference resource, for example, DMRS and CSI-RS, DMRS and data in PDSCH, etc.

[0268] For example, the reference resource corresponding to the first channel state information is determined by the parameter resourcesForChannelMeasurement (resources for channel measurement) in the RRC signaling CSI-ReportConfig. resourcesForChannelMeasurement includes the resource unit where the reference signal is located, and the resource unit consists of an orthogonal frequency division multiplexing (OFDM) symbol and a subcarrier.

[0269] In some embodiments, the configuration information of the first channel state information further includes the reporting quantity of the first channel state information.

[0270] As another example, the second control signaling includes first DCI signaling, where the first DCI signaling is DCI signaling scrambled using at least one of the following radio network temporary identifiers (RNTI):

[0271] Semi-static channel state information radio network temporary identifier (CSI-RNTI);

[0272] Cell Radio Network Temporary Identifier (Cell-RNTI, C-RNTI);

[0273] Configured Scheduling-RNTI (CS-RNTI)

[0274] Modulation and coding scheme cell-RNTI (MCS-C-RNTI);

[0275] A predefined RNTI used to activate or deactivate sending the first channel state information.

[0276] The predefined RNTI used to activate or deactivate the sending of the first channel state information may be a semi-persistent enhanced cell-specific reference signal radio network temporary identifier (SP-ECSI-RNTI).

[0277] As another example, the second control signaling includes second DCI signaling, at least one field in the second DCI signaling is redefined, and the redefined field is used to activate or deactivate sending the first channel state information, and the at least one field includes at least one of the following:

[0278] A DCI field used to determine the hybrid automatic repeat request process identifier (HARQ process ID) of the data channel, such as the HARQ process number field;

[0279] A DCI field for determining a redundancy version of a data channel, such as a Redundancy version field;

[0280] A DCI field for determining time domain resource allocation for a data channel, such as a Time domain resource assignment field;

[0281] A DCI field for determining frequency domain resource allocation for a data channel, such as a frequency domain resource assignment field;

[0282] A field used to indicate sending of second channel state information, such as a CSI request field;

[0283] A field used to indicate a sending type of the first channel state information;

[0284] A field used to select a non-periodic channel state information trigger state, such as a CSI request field;

[0285] A field used to indicate switching between first channel state information and second channel state information;

[0286] A field used for code block group indication, such as a CBGTI (Code Block Group Transmission Information) field;

[0287] A field used to indicate whether the first channel state information is retransmitted data, such as an NDI field.

[0288] In some embodiments, the at least one field may further include a DCI field for determining a transmission MCS level of a data channel, such as a modulation and coding scheme field.

[0289] Resource block assignment field.

[0290] In some embodiments, the field used to indicate the sending of the second channel state information and the field used to indicate the sending type of the first channel state information can be understood as newly introduced fields in the DCI signaling.

[0291] In some embodiments, redefining the at least one field mentioned above may be setting the at least one field mentioned above to all '0's or all '1's, so that the at least one redefined field is used to activate or deactivate the sending of the first channel state information. For example, when the DCI field used to determine the redundant version of the data channel is set to all '0's, the DCI field is used to activate the sending of the first channel state information, and when the DCI field used to determine the redundant version of the data channel is set to all '1's, the DCI field is used to deactivate the sending of the first channel state information. Alternatively, when the DCI field used to determine the redundant version of the data channel is set to all '1's, the DCI field is used to activate the sending of the first channel state information, and when the DCI field used to determine the redundant version of the data channel is set to all '0's, the DCI field is used to deactivate the sending of the first channel state information. In addition, the above-mentioned fields can be combined in different ways to indicate the activation or deactivation of the sending of the first channel state information. For example, when the DCI field for determining the redundancy version of the data channel is set to all '0's and the DCI field for determining the hybrid automatic repeat request process identifier (HARQ process ID) of the data channel is set to all '0's, the DCI field is used to activate the transmission of the first channel state information. When the DCI field for determining the redundancy version of the data channel is set to all '1's and the DCI field for determining the hybrid automatic repeat request process identifier (HARQ process ID) of the data channel is set to all '1's, the DCI field is used to deactivate the transmission of the first channel state information.

[0292] In other words, activation and deactivation operations are distinguished by using different numbers of DCI fields in the same state. For example, when the DCI field used to determine the redundancy version of the data channel is set to all '0's and the DCI field used to determine the hybrid automatic repeat request process identifier (HARQ process ID) of the data channel is set to all '0's, the DCI field is used to activate the transmission of the first channel state information. When the DCI field used to determine the redundancy version of the data channel is set to all '0's, the DCI field used to determine the hybrid automatic repeat request process identifier (HARQ process ID) of the data channel is set to all '0's, and the DCI field used to determine the frequency domain resource allocation of the data channel is set to all '0's, the DCI field is used to deactivate the transmission of the first channel state information.

[0293] In some embodiments, the redefined domain can also be determined through RRC signaling configuration. For example, when RRC signaling related to the first channel state information is configured, the DCI domain used to determine the hybrid automatic repeat request process identifier (HARQ process ID) of the data channel can be interpreted as a domain used to indicate the switching between the first channel state information and the second channel state information. When RRC signaling related to the first channel state information is not configured, the DCI domain used to determine the hybrid automatic repeat request process identifier (HARQ process ID) of the data channel uses its original purpose to indicate the HARQ process of the data channel.

[0294] In some embodiments, the DCI domain used to determine the time domain resource allocation of the data channel and the DCI domain used to determine the frequency domain resource allocation of the data channel in the at least one redefined domain mentioned above can also be used to indicate the sending type of the first channel state information.

[0295] In some embodiments, the first channel state information includes semi-static first channel state information, and one or more of the following fields in the at least one redefined field may be used to indicate activation or deactivation of sending the semi-static first channel state information. The one or more fields may include: a DCI field for determining a hybrid automatic repeat request process identifier for a data channel, a DCI field for determining a redundant version of a data channel, a DCI field for determining time domain resource allocation for a data channel, a field for indicating sending second channel state information, and a resource block allocation field.

[0296] In some embodiments, the DCI field used to determine the transmission MCS level of the data channel may be used to indicate deactivation of sending the semi-static first channel state information.

[0297] In some embodiments, the first channel state information includes non-periodic first channel state information, and one or more of the at least one redefined fields are used to activate or deactivate the sending of the non-periodic first channel state information. The one or more fields include: a field for selecting a trigger state of the non-periodic channel state information, a field for indicating switching between the first channel state information and the second channel state information, a field for code block group indication, and a field for indicating whether the first channel state information is retransmitted data. The field for indicating whether the first channel state information is retransmitted data may be a new data indicator (NDI) field.

[0298] In the above embodiment, after receiving the second control signaling, the first node sends the first channel state information.

[0299] In some embodiments, the predefined transmission behavior includes at least one of the following:

[0300] The first node receives a PDSCH and decodes it incorrectly;

[0301] The first node receives and decodes the PDSCH correctly;

[0302] The first node receives a PDSCH of a predefined HARQ process, where the predefined HARQ process is determined by the second control signaling;

[0303] The first node receives the PDSCH within a predefined time window, wherein the length, period, and offset of the predefined time window are determined by second control signaling;

[0304] The first node detects a wireless link failure;

[0305] The first node performs beam switching;

[0306] The first node performs a transmitter receiver pair (TRP) switch.

[0307] In some embodiments, when the predefined transmission behavior is that the first node receives a PDSCH decoding error, the following situations may be included:

[0308] Scenario 1: The first node activates and sends the first channel state information to the second node after receiving K1 consecutive PDSCH decoding errors.

[0309] K1 is a positive integer, that is, K1>=1, and K1 is determined by high-level parameter configuration.

[0310] As an example, the first node activates sending the first channel state information to the second node at a moment after receiving K1 consecutive PDSCH decoding errors. The first node may activate measuring the reference resources at a moment after receiving K1 consecutive PDSCH decoding errors, such as measuring the DMRS or data in the K1th PDSCH to obtain the first channel state information. The first node may also activate sending the first channel state information to the second node at a moment after receiving K1 consecutive PDSCH decoding errors. The first node may also activate sending the first channel state information to the second node after sending the feedback information NACK of the K1th PDSCH to the second node, and not send the first channel state information to the second node during the time period between the K1th PDSCH decoding error moment and the NACK sending moment.

[0311] Scenario 2: The first node activates and sends the first channel state information to the second node at a moment when K2 errors are accumulated in receiving PDSCH decoding.

[0312] K2 is a positive integer, that is, K2>=1, and K2 is determined by high-level parameter configuration.

[0313] As an example, the first node activates sending the first channel state information to the second node at a moment after receiving K2 cumulative PDSCH decoding errors. The first node may activate measuring reference resources at a moment after receiving K2 cumulative PDSCH decoding errors, for example, measuring the DMRS or data in the K2th PDSCH to obtain the first channel state information. The first node may also activate sending the first channel state information to the second node at a moment after receiving K2 cumulative PDSCH decoding errors. The first node may also activate sending the first channel state information to the second node after sending feedback information NACK of the K2th PDSCH to the second node, and not send the first channel state information to the second node during the time period between the K2th PDSCH decoding error moment and the NACK sending moment.

[0314] In some embodiments, when the predefined transmission behavior is that the first node receives and decodes the PDSCH correctly, the following situations may be included:

[0315] Scenario 3: After receiving K3 consecutive correct PDSCH decodings, the first node deactivates the sending of the first channel state information to the second node.

[0316] K3 is a positive integer, that is, K3>=1, and K3 is determined by high-level parameter configuration.

[0317] As an example, after receiving K3 consecutive PDSCH decoding errors, the first node deactivates the transmission of the first channel state information to the second node, and does not measure the reference resources or transmit the first channel state information. Alternatively, after transmitting feedback information ACK of the K3rd PDSCH to the second node, the first node deactivates the transmission of the first channel state information to the second node, and continues to transmit the first channel state information to the second node during the time period between the K3th PDSCH decoding being correct and the ACK being transmitted.

[0318] Scenario 4: The first node deactivates the transmission of the first channel state information to the second node after receiving K4 PDSCH decoding results.

[0319] K4 is a positive integer, that is, K4>=1, and K4 is determined by high-level parameter configuration.

[0320] As an example, the first node deactivates the transmission of the first channel state information to the second node after receiving K3 cumulative PDSCH decoding errors, and does not measure the reference resources or transmit the first channel state information. Alternatively, after transmitting feedback information ACK of the K3th PDSCH to the second node, the first node deactivates the transmission of the first channel state information to the second node, and continues to transmit the first channel state information to the second node during the time period between the moment when the K3th PDSCH is correctly decoded and the moment when the ACK is transmitted.

[0321] In some embodiments, when a first node detects a radio link failure, the first node needs to retrain OLLA. Radio link failure may include radio link quality measured using synchronization signaling, physical broadcast channel blocks (SSBs), and CSI-RS failing to meet a predefined threshold, such as a block error ratio (BLER) threshold. In this case, sending the first channel state information allows OLLA to more quickly match the signal-to-interference-plus-noise ratio (SINR) of the existing channel.

[0322] In some embodiments, if the reference resource of the first node is within a predefined time window, the first channel state information is sent.

[0323] For example, the second node predefines the time window length, the period and the offset of the time window. When the reference resource of the first node is within the time window, the sending of the first channel state information is triggered.

[0324] For example, assume the time window length is 5 slots, the time window period is 10 slots, and the offset is 0 slots. If the time window is activated starting from the first slot, then if reference resources exist in the first through fifth slots, the first channel state information needs to be transmitted. However, for reference resources outside the time window from the sixth through tenth slots, the first channel state information does not need to be transmitted. For reference resources within the eleventh through fifteenth slots, which form the second time window, the first channel state information needs to be transmitted. And so on.

[0325] In some embodiments, the second node receives a reference resource of a predefined HARQ process and then sends the first channel state information.

[0326] For example, the second node predefines some reference HARQ processes, and triggers the sending of the first channel state information if the reference resource belongs to these defined HARQ processes.

[0327] For example, assume that the UE uses four processes for data transmission: process 0, process 1, process 2, and process 3. The second node defines process 2 as the process that needs to send the first channel state information. If the process of the reference resource (such as PDSCH) is process 2, the transmission of the first channel state information is triggered.

[0328] In some embodiments, the first node performs beam switching and then sends the first channel state information.

[0329] For example, beam switching includes a change in the SSB index and a change in the antenna port number corresponding to the CSI-RS.

[0330] In some embodiments, the first node has more than one TPR link, and if a TRP in the first node changes, the first channel state information is sent.

[0331] In some embodiments, the predefined service identification information includes at least one of the following:

[0332] Logical channel group identifier;

[0333] Logical channel identifier.

[0334] The logical channel group identifier is used to identify a predefined logical channel group, and the logical channel identifier is used to identify a predefined logical channel.

[0335] For example, for data identified by a predefined logical channel or logical channel group, first channel state information needs to be sent.

[0336] Based on the above embodiment, the following complete example is given.

[0337] Example 1: The first channel state information is feedback information based on the current transmission resource and is represented by the difference between the signal-to-noise ratio (SNR) corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained based on the reference resource. The corresponding reference resource is the DMRS reference signal included in the current transmission block, and the MCS level difference corresponds to the frequency domain bandwidth scheduled for the current transmission block. The SNR difference is an SNR offset. The indication value is represented, and the indication relationship may be as shown in Table 10 below.

[0338] Table 10

[0339] Therefore, the first channel state information is 2-bit information.

[0340] Using PUCCH transmission, when the first control signaling configures parameters related to the first channel state information, the 1-bit information in the HARQ-ACK codebook is expanded to 2-bit information, and sent using the PUCCH resources determined by the HARQ-ACK codebook.

[0341] When the radio link quality measured by the CSI-RS does not meet the predefined BLER threshold, the first node performs a radio link handover operation. After the radio link handover, the transmission of the first channel state information is triggered. At this time, the DMRS symbol in the PDSCH sent by the second node to the first node is used to measure the first channel state information. If the difference between the obtained SNR and the SNR corresponding to the MCS level configured by the second node is -2dB, the first node transmits a '01' via HARQ-ACK information. After receiving the '01', the second node uses -0.3 as the offset for OLLA training.

[0342] Example 2: The first channel state information is feedback information based on retransmission scheduling and is transmitted using the MCS level of the retransmission scheduling. The corresponding reference resource is the DMRS reference signal included in the current transport block, and the MCS level corresponds to the frequency domain bandwidth scheduled for the current transport block. The length of this information is related to the maximum number of indexes in the current MCS table. If the maximum number of indexes in the MCS table is 32, the length of this information is 5 bits.

[0343] PUCCH transmission is adopted. When the first control signaling configures parameters related to the first channel state information, the newly defined UCI signaling is adopted to transmit the information.

[0344] When there is a data transmission error on a PDSCH, the transmission of the first channel state information is triggered. When the first node makes a decoding error, the first node performs a measurement based on the DMRS in the PDSCH to obtain the first channel state information. When NACK is fed back to the second node, an independent PUCCH resource is generated to send the first channel state information. For example, if the DMRS is measured and the MCS level for retransmission is determined to be 8, the first node feeds back '01000' to the second node. After the second node receives the feedback of '01000', it uses MCS=8 as the MCS level for its retransmitted data in the retransmission of the PDSCH.

[0345] Based on the embodiment shown in Figure 3, compared with the related art in which the channel state information is obtained by measuring the CSI-RS, the first channel state information in the embodiment of the present disclosure is obtained by measuring the data transmitted in the DMRS and / or PDSCH, taking into account the impact of neighboring cell interference on the accuracy of the channel state information, thereby improving the accuracy of the channel state information, and the first channel state information at least indicates feedback information based on the current transmission resources and feedback information used for retransmission scheduling, thereby improving the accuracy of the channel state information.

[0346] In some embodiments, as shown in FIG6 , an embodiment of the present disclosure further provides a method for receiving channel state information. The method is applied to a second node, which may be the second node 120 shown in FIG2 . The method may include the following steps:

[0347] S201: Send a first control signaling.

[0348] In some embodiments, when the second node needs to determine a data transmission strategy with the first node, the second node may send a first control signaling to the first node, and accordingly, the first node receives the first control signaling sent by the second node.

[0349] For the description of the first control signaling, reference may be made to the relevant description of the first control signaling in the embodiment shown in FIG3 , which will not be repeated here.

[0350] S202: Receive first channel state information sent by a first node.

[0351] In some embodiments, after a first node obtains first channel state information based on a reference resource in a first control signaling, the first node may send the first channel state information to a second node. Correspondingly, the second node receives the first channel state information sent by the first node. The first channel state information is obtained based on the reference resource indicated by the first control signaling, and the first channel state information indicates at least one of the following feedback information: feedback information based on the current transmission resource and feedback information for retransmission scheduling.

[0352] In some embodiments, the feedback information based on the current transmission resource includes at least one of the following:

[0353] a difference between a modulation and coding scheme MCS level configured by the second node and an MCS level obtained based on the reference resource;

[0354] A difference between a signal-to-noise ratio (SNR) corresponding to the MCS level configured for the second node and an SNR corresponding to the MCS level obtained based on the reference resource;

[0355] Interference strength indication;

[0356] An MCS level obtained according to a reference resource and a first table, the first table including a channel quality indicator CQI table or an MCS table;

[0357] Quantized channel state information, where the quantized channel state information includes at least one of the following: CQI information, precoding matrix indicator, rank indicator, layer indicator, and SNR information.

[0358] In some embodiments, the feedback information used for retransmission scheduling includes at least one of the following:

[0359] MCS level for retransmission;

[0360] Retransmitted beam information;

[0361] CQI table or MCS table used for retransmission;

[0362] The SNR of the retransmission;

[0363] a difference between the MCS level configured for the second node and the MCS level obtained based on the reference resource;

[0364] A difference between an SNR corresponding to the MCS level configured by the second node and an SNR corresponding to the MCS level obtained according to the reference resource;

[0365] The subband ratio corresponding to erroneous bits in the PDSCH transmitted by the second node.

[0366] In some embodiments, the resource information in which the first node sends the first channel state information includes at least one of the following:

[0367] Physical Uplink Control Channel PUCCH;

[0368] Physical Uplink Shared Channel PUSCH.

[0369] In some embodiments, the first channel state information is sent by the first node when a first preset condition is satisfied, where the first preset condition includes at least one of the following:

[0370] The first node receives the first control signaling;

[0371] The first node performs a predefined transmission behavior;

[0372] The first node receives predefined service identification information.

[0373] It should be noted that, for the description of the first channel state information, reference may be made to the relevant description of the first channel state information in the embodiment shown in FIG. 3 , which is not repeated here.

[0374] In some embodiments, after receiving the first channel state information, the second node may determine a data transmission strategy between itself and the first node based on the first channel state information, and then schedule downlink data based on the data transmission strategy.

[0375] The first channel state information in the embodiment of the present disclosure is described below with reference to several examples.

[0376] Example 1:

[0377] Assume that the feedback information indicated by the first channel state information is feedback information based on the current transmission resource, and the feedback information is the difference between the SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained based on the reference resource. The first channel state information includes an indication value of the feedback information, and the indication value is used to indicate the variation range of the feedback information. For example, the first channel state information is sent as 2 bits. In combination with the above Table 1, the feedback information can be represented by 11. The resource corresponding to the feedback information is the currently scheduled frequency domain bandwidth. The preset condition is that when the first node receives a PDSCH decoding error, the measurement reference resource is activated. For example, the reference resource can be a DMRS resource configured by RRC signaling. The DMRS resource configured by RRC signaling can be measured to obtain the first channel state information. Sending the first channel state information can be a newly defined UCI signaling for sending eCSI on the PUCCH, and the UCI signaling includes the first channel state information.

[0378] PUCCH is the PUCCH configured by the RRC signaling PUCCH-configuration (config). The format parameter in PUCCH-config is used to determine the PUCCH type, the starting symbol (startingSymbolIndex) of the PUCCH, and the symbol length occupied by the PUCCH (nrofSymbols).

[0379] The PUCCH used for the first channel state information and the PUCCH used for the HARQ-ACK information are distinguished by frequency division. RRC signaling can be used to configure the PUCCH used for the first channel state information and the PUCCH used for the HARQ-ACK information to be paired. The paired PUCCH can be determined by using the same dl-dataToUL-ACK parameter.

[0380] Based on the above configuration, when the first node feeds back a transmission block transmission error and NACK information, the first channel state information can be sent to the second node on a specific resource. After receiving the first channel state information, the second node can perform operations such as OLLA step size adjustment and scheduling adjustment.

[0381] It should be understood that the scheme of Example 1 is to use the first channel state information measured by precise measurement to provide more accurate channel state information for the transmission of the next transmission block. At the same time, the first channel state information can be quantized and compressed by including the indication value of the feedback information in the first channel state information, thereby reducing the overhead of the feedback signaling of the first node.

[0382] Example 2:

[0383] Assume that the feedback information indicated by the first channel state information is quantized channel state information, including a frequency-domain subband CSI report at the time of measurement of the first channel state information. The CSI report includes information such as the MCS level, PMI, RI, and LI corresponding to the SNR value at the time of measurement of the first channel state information. The feedback information is in the form of specific values ​​of the feedback information. Assuming there are five subbands, namely subband 1, subband 2, subband 3, subband 4, and subband 5, the bit width of the data in the first channel state information is 13 bits * 5 = 65 bits. Assuming the MCS level is 5 bits, the PMI is 4 bits, the RI is 2 bits, and the LI is 2 bits, the bit width of each subband feedback can be as shown in Figure 7. The value of the report quantity parameter (reportQuantity) in the RRC signaling channel state information report configuration (CSI-reportConfig) is configured as 'channel quality information (cri-RI-eCQI)', indicating that the first channel state information measurement is being performed. The measured reference resources, such as DMRS resources, are associated with the resources for channel measurement (resourcesForChannelMeasurement) parameter. The MCS level in FIG7 is the MCS level.

[0384] The configuration value of the time domain behavior (reportConfigType) of the CSI reporting in the CSI-reportConfig in the RRC signaling is 'periodic', indicating that the first channel state information is reported in a periodic manner.

[0385] The duration (Duration) defined in the CSI-reportConfig in the RRC signaling indicates that the first channel state information is measured and sent within a specific time window. The periodicity and offset (periodicityAndOffset) parameters are also defined to determine the period and offset of the Duration. It should be noted that the Duration period can be an integer multiple of the period of the first channel state information. Duration is a certain number of consecutive time slots.

[0386] The first channel state information may be sent through the newly defined UCI signaling of the eCSI and transmitted through PUCCH resources, where the PUCCH is the PUCCH configured by the RRC signaling PUCCH-config.

[0387] When the Duration time window arrives, the first node activates the measurement and transmission of the first channel state information. When the Duration time window ends, the first node deactivates the measurement and transmission of the first channel state information.

[0388] The above mainly introduces the solution provided by the present disclosure from the perspective of the interaction between each node. It is understandable that each node, such as the first node and the second node, includes a hardware structure and / or software module corresponding to the execution of each function in order to realize the above functions. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0389] The embodiment of the present disclosure can divide the functional modules of the first node or the second node according to the above-mentioned method embodiment. 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-mentioned integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiment of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0390] FIG8 is a schematic diagram showing the composition of a communication device provided by an embodiment of the present disclosure. As shown in FIG8 , the communication device 30 includes a receiving unit 301 , a processing unit 302 , and a sending unit 303 .

[0391] The communication device 30 may be the first node or a chip in the first node. When the communication device 30 is used to implement the function of the first node in the above embodiment, each unit may be used to implement the following functions.

[0392] The receiving unit 301 is configured to receive a first control signaling;

[0393] The processing unit 302 is configured to obtain first channel state information based on a reference resource indicated by the first control signaling, where the first channel state information indicates at least one of the following feedback information: feedback information based on a current transmission resource and feedback information for retransmission scheduling;

[0394] The sending unit 303 is configured to send the first channel state information to the second node.

[0395] In some embodiments, the first control signaling includes at least one of the following: first downlink control information DCI signaling; first radio resource control RRC signaling.

[0396] In some embodiments, the reference resource includes at least one of the following: a demodulation reference signal DMRS; and data transmitted in a physical downlink shared channel PDSCH.

[0397] In some embodiments, the feedback information based on the current transmission resource includes at least one of the following: the difference between the modulation and coding scheme MCS level configured by the second node and the MCS level obtained according to the reference resource; the difference between the signal-to-noise ratio SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource; an interference intensity indication; the MCS level obtained according to the reference resource and a first table, the first table including a channel quality indication CQI table or an MCS table; quantized channel state information, the quantized channel state information including at least one of the following: CQI information, a precoding matrix indicator, a rank indicator, a layer indicator, and SNR information.

[0398] In some embodiments, the quantized channel state information is jointly determined based on a reference resource indicated by the first control signaling and a reference resource of a channel state information reference signal CSI-RS.

[0399] In some embodiments, the feedback information used for retransmission scheduling includes at least one of the following: the MCS level of retransmission; the beam information of retransmission; the CQI table or MCS table used for retransmission; the SNR amount of retransmission; the difference between the MCS level configured by the second node and the MCS level obtained according to the reference resource; the difference between the SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource; the subband ratio corresponding to the erroneous bits in the PDSCH transmitted by the second node.

[0400] In some embodiments, the resource corresponding to the feedback information included in the first channel state information includes at least one of the following: the entire transmission bandwidth; part of the transmission bandwidth; the currently scheduled frequency domain bandwidth; part of the bandwidth in the currently scheduled frequency domain bandwidth.

[0401] In some embodiments, the first channel state information includes at least one of the following: a specific value of the feedback information indicated by the first channel state information; a state value, the state value is used to switch the feedback information indicated by the first channel state information; an indication value, an indication value corresponding to the specific value of one or more feedback information indicated by the first channel state information.

[0402] In some embodiments, the resource information for sending the first channel state information includes at least one of the following: a physical uplink control channel PUCCH; a physical uplink shared channel PUSCH.

[0403] In some embodiments, the first channel state information and hybrid automatic repeat request confirmation HARQ-ACK information are sent in the same PUCCH through at least one of the following sending methods: the first channel state information and the HARQ-ACK information are spliced ​​and sent through the PUCCH; the codebook of the first channel state information and the codebook of the HARQ-ACK information are spliced ​​and sent through the PUCCH; the HARQ-ACK information is sent through the PUCCH, and the codebook of the HARQ-ACK information includes the first channel state information.

[0404] In some embodiments, the PUCCH used to send the first channel state information and the PUCCH used to send the HARQ-ACK information are configured separately.

[0405] In some embodiments, the reference resource order of the first channel state information feedback is the same as the reference resource order of the HARQ-ACK information feedback, wherein, in the PUCCH used to send the first channel state information, different reference resources are distinguished by time division or frequency division to obtain the first channel state information.

[0406] In some embodiments, when the first channel state information is sent through PUSCH, the beta offset value used by the first channel state information is the same as the beta offset value used by the HARQ-ACK information, or the beta offset value used by the first channel state information is the beta offset value corresponding to the first channel state information.

[0407] In some embodiments, when the first channel state information is sent via PUSCH, the first channel state information includes at least one of the following at the time domain starting mapping position of PUSCH: the first symbol of PUSCH; the first symbol after the first demodulation reference signal DRMS ​​symbol of PUSCH.

[0408] In some embodiments, the mapping position of the first channel state information on the PUSCH is related to the physical layer priority of the uplink control information UCI signaling.

[0409] In some embodiments, the physical layer priority of the first channel state information is determined based on at least one of the following: the physical layer priority of the HARQ-ACK information; the physical layer priority of the second channel state information; and the physical layer priority indicated by the first control signaling.

[0410] In some embodiments, the sending unit 303 can be used to: send first channel state information to the second node when a preset condition is met, and the preset condition includes at least one of the following: the first node receives a second control signaling; the first node performs a predefined transmission behavior; the first node receives predefined service identification information.

[0411] In some embodiments, the second control signaling includes radio resource control RRC signaling, which is used to configure configuration information of the first channel state information; the configuration information of the first channel state information includes at least one of the following parameters: the reporting type of the first channel state information; the time domain configuration and / or frequency domain configuration of the first channel state information; and the reference resources corresponding to the first channel state information.

[0412] In some embodiments, the second control signaling includes first downlink control information DCI signaling, and the first DCI signaling is DCI signaling obtained by scrambling using at least one of the following wireless network temporary identifiers RNTI: semi-static channel state information wireless network temporary identifier CSI-RNTI; cell wireless network temporary identifier C-RNTI; semi-static scheduling wireless network temporary identifier CS-RNTI; modulation and coding scheme cell wireless network temporary identifier MCS-C-RNTI; a predefined RNTI for activating or deactivating the sending of the first channel state information.

[0413] In some embodiments, the second control signaling includes a second DCI signaling, at least one field in the second DCI signaling is redefined, and the redefined field is used to activate or deactivate the sending of the first channel state information, and the at least one field includes: a DCI field for determining the hybrid automatic repeat request process identifier of the data channel; a DCI field for determining the redundant version of the data channel; a DCI field for determining the time domain resource allocation of the data channel; a DCI field for determining the frequency domain resource allocation of the data channel; a field for indicating the sending of the second channel state information; a field for indicating the sending type of the first channel state information; a field for selecting a non-periodic channel state information trigger state; a field for indicating switching between the first channel state information and the second channel state information; a field for code block group indication; and a field for indicating whether the first channel state information is retransmitted data.

[0414] In some embodiments, the predefined transmission behavior includes at least one of the following: the first node receives a PDSCH with a decoding error; the first node receives a PDSCH with a correct decoding; the first node receives a PDSCH of a predefined HARQ process, wherein the predefined HARQ process is determined by a second control signaling; the first node receives the PDSCH within a predefined time window, wherein the length, period and offset of the predefined time window are determined by the second control signaling; the first node detects a wireless link failure; the first node performs a beam switching; the first node performs a transmission-reception pair TRP switching.

[0415] In some embodiments, the predefined service identification information includes at least one of the following: a logical channel group identifier; a logical channel identifier.

[0416] FIG9 is a schematic diagram showing the composition of another communication device provided by an embodiment of the present disclosure. As shown in FIG9 , the communication device 40 includes a sending unit 401 and a receiving unit 402 .

[0417] The communication device 40 may be the second node or a chip in the second node. When the communication device 40 is used to implement the function of the second node in the above embodiment, each unit may be used to implement the following functions.

[0418] The sending unit 401 is configured to send a first control signaling.

[0419] The receiving unit 402 is used to receive first channel state information sent by the first node, where the first channel state information is obtained based on a reference resource indicated by a first control signaling, and the first channel state information indicates at least one of the following feedback information: feedback information based on current transmission resources and feedback information for retransmission scheduling.

[0420] In some embodiments, the reference resource includes at least one of the following: a demodulation reference signal DMRS; and data transmitted in a physical downlink shared channel PDSCH.

[0421] In some embodiments, the feedback information based on the current transmission resource includes at least one of the following: the difference between the modulation and coding scheme MCS level configured by the second node and the MCS level obtained according to the reference resource; the difference between the signal-to-noise ratio SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource; an interference intensity indication; the MCS level obtained according to the reference resource and a first table, the first table including a channel quality indication CQI table or an MCS table; quantized channel state information, the quantized channel state information including at least one of the following: CQI information, a precoding matrix indicator, a rank indicator, a layer indicator, and SNR information.

[0422] In some embodiments, the quantized channel state information is jointly determined based on a reference resource indicated by the first control signaling and a reference resource of a channel state information reference signal CSI-RS.

[0423] In some embodiments, the feedback information used for retransmission scheduling includes at least one of the following: the MCS level of retransmission; the beam information of retransmission; the CQI table or MCS table used for retransmission; the SNR amount of retransmission; the difference between the MCS level configured by the second node and the MCS level obtained according to the reference resource; the difference between the SNR corresponding to the MCS level configured by the second node and the SNR corresponding to the MCS level obtained according to the reference resource; the subband ratio corresponding to the erroneous bits in the PDSCH transmitted by the second node.

[0424] In some embodiments, the resource corresponding to the feedback information included in the first channel state information includes at least one of the following: the entire transmission bandwidth; part of the transmission bandwidth; the currently scheduled frequency domain bandwidth; part of the bandwidth in the currently scheduled frequency domain bandwidth.

[0425] In some embodiments, the first channel state information includes at least one of the following: a specific value of the feedback information indicated by the first channel state information; a state value, the state value is used to switch the feedback information indicated by the first channel state information; an indication value, an indication value corresponding to the specific value of one or more feedback information indicated by the first channel state information.

[0426] In some embodiments, the resource information for the first node to send the first channel state information includes at least one of the following: a physical uplink control channel PUCCH; a physical uplink shared channel PUSCH.

[0427] In some embodiments, the first channel state information is sent by the first node when a first preset condition is met, and the preset condition includes at least one of the following: the first node receives a first control signaling; the first node performs a predefined transmission behavior; the first node receives predefined service identification information.

[0428] If the various units in Figures 8 and 9 are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present disclosure is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the various embodiments of the present disclosure. The storage medium for storing computer software products includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0429] In the case of implementing the functions of the above-mentioned integrated modules in hardware, an embodiment of the present disclosure provides a schematic structural diagram of a communication device, which may be the above-mentioned communication device 30 or communication device 40. As shown in Figure 10, the communication device 50 includes: a processor 502, a communication interface 503, and a bus 504. In some embodiments, the communication device 50 may also include a memory 501.

[0430] The processor 502 can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the present disclosure. The processor 502 can 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 device, a transistor logic device, a hardware component, or any combination thereof, and can implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the present disclosure. The processor 502 can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0431] The communication interface 503 is used to connect to other devices via a communication network, such as Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0432] The memory 501 may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0433] As a possible implementation, the memory 501 may exist independently of the processor 502. The memory 501 may be connected to the processor 502 via a bus 504 and used to store instructions or program codes. When the processor 502 calls and executes the instructions or program codes stored in the memory 501, the method for sending and receiving channel state information provided in the embodiments of the present disclosure can be implemented.

[0434] In another possible implementation, the memory 501 may also be integrated with the processor 502 .

[0435] Bus 504 can be an Extended Industry Standard Architecture (EISA) bus, etc. Bus 504 can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, FIG10 shows only one thick line, but this does not mean that there is only one bus or only one type of bus.

[0436] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above models is used as an example. In actual applications, the above functions can be allocated to different models as needed, that is, the internal structure of the base station or terminal can be divided into different models to complete all or part of the functions described above.

[0437] The embodiments of the present disclosure also provide a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by computer instructions to instruct relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit or memory of any of the above-mentioned embodiments. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned base station or terminal, such as a plug-in hard disk, a smart memory card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the above-mentioned base station or terminal. Furthermore, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned base station or terminal and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned base station or terminal. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0438] An embodiment of the present disclosure further provides a computer program product, which includes a computer program. When the computer program product is run on a computer, the computer is enabled to execute any one of the channel state information sending and receiving methods provided in the above embodiments.

[0439] Although the present disclosure is described herein in conjunction with various embodiments, in the process of implementing the disclosure for which protection is sought, those skilled in the art may understand and implement 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 components or steps, and "one" or "an" does not exclude multiple components. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0440] Although the present disclosure has been described in conjunction with various features and embodiments thereof, it will be apparent that various modifications and combinations may be made thereto without departing from the scope of the present disclosure. Accordingly, this specification and the drawings are merely illustrative of the present disclosure as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present disclosure. It will be apparent that those skilled in the art may make various modifications and variations to the present disclosure without departing from the scope of the present disclosure. Thus, the present disclosure is intended to encompass such modifications and variations as would fall within the scope of the claims of the present disclosure and their equivalents.

[0441] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or replacements within the technical scope disclosed in the present disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for sending channel state information, applied to a first node, the method comprising: receiving a first control signaling; Based on the reference resource indicated by the first control signaling, first channel state information is obtained, where the first channel state information indicates at least one of the following feedback information: feedback information based on current transmission resources and feedback information for retransmission scheduling; The first channel state information is sent to a second node.

2. The method according to claim 1, wherein: The first control signaling includes at least one of the following: First downlink control information DCI signaling; First radio resource control RRC signaling.

3. The method according to claim 1, wherein: The reference resource includes at least one of the following: Demodulation reference signal DMRS; Data transmitted in the Physical Downlink Shared Channel PDSCH.

4. The method according to claim 1, wherein: The feedback information based on the current transmission resource includes at least one of the following: a difference between a modulation and coding scheme MCS level configured by the second node and an MCS level obtained according to the reference resource; A difference between a signal-to-noise ratio SNR corresponding to the MCS level configured by the second node and an SNR corresponding to the MCS level obtained according to the reference resource; Interference intensity indication; An MCS level and a first table obtained according to the reference resource, wherein the first table includes a channel quality indication CQI table or an MCS table; Quantized channel state information, wherein the quantized channel state information includes at least one of the following: CQI information, a precoding matrix indicator, a rank indicator, a layer indicator, and SNR information.

5. The method according to claim 4, wherein: The quantized channel state information is jointly determined based on the reference resource and a reference resource of a channel state information reference signal CSI-RS.

6. The method according to claim 1, wherein: The feedback information used for retransmission scheduling includes at least one of the following: MCS level for retransmission; Retransmitted beam information; CQI table or MCS table used for retransmission; The SNR of the retransmission; a difference between the MCS level configured by the second node and the MCS level obtained according to the reference resource; A difference between an SNR corresponding to the MCS level configured by the second node and an SNR corresponding to the MCS level obtained according to the reference resource; The proportion of subbands corresponding to erroneous bits in the PDSCH transmitted by the second node.

7. The method according to claim 1, wherein: The resource corresponding to the feedback information included in the first channel state information includes at least one of the following: The entire transmission bandwidth; Partial transmission bandwidth; The frequency domain bandwidth currently scheduled; Part of the frequency domain bandwidth currently scheduled.

8. The method according to claim 1, wherein: The first channel state information includes at least one of the following: a specific value of the feedback information indicated by the first channel state information; a state value, wherein the state value is used to switch feedback information indicated by the first channel state information; An indication value, where one indication value corresponds to a specific value of one or more feedback information indicated by the first channel state information.

9. The method according to claim 1, wherein: The resource information for sending the first channel state information includes at least one of the following: Physical uplink control channel PUCCH; Physical uplink shared channel PUSCH.

10. The method according to claim 9, wherein: The first channel state information and the hybrid automatic repeat request confirmation HARQ-ACK information are sent in the same PUCCH by at least one of the following sending methods: The first channel state information is concatenated with the HARQ-ACK information and sent through the PUCCH; The codebook of the first channel state information is concatenated with the codebook of the HARQ-ACK information and sent through the PUCCH; HARQ-ACK information is sent through the PUCCH, and a codebook of the HARQ-ACK information includes the first channel state information.

11. The method according to claim 9, wherein: The PUCCH used to send the first channel state information and the PUCCH used to send the HARQ-ACK information are configured separately.

12. The method according to claim 11, wherein: The reference resource order of the first channel state information feedback is the same as the reference resource order of the HARQ-ACK information feedback, wherein, in the PUCCH used to send the first channel state information, different reference resources are distinguished by time division or frequency division to obtain the first channel state information.

13. The method according to claim 9, wherein: In the case of sending the first channel state information through the PUSCH, the beta offset value used by the first channel state information is the same as the beta offset value used by the HARQ-ACK information, or the beta offset value used by the first channel state information is the beta offset value corresponding to the first channel state information.

14. The method according to claim 9, wherein: In the case where the first channel state information is sent through the PUSCH, the first channel state information includes at least one of the following at a time domain start mapping position of the PUSCH: The first symbol of the PUSCH; The first symbol after the first demodulation reference signal DRMS ​​symbol of the PUSCH.

15. The method according to claim 14, wherein: The mapping position of the first channel state information on the PUSCH is related to the physical layer priority of uplink control information UCI signaling.

16. The method according to claim 1, wherein: The physical layer priority of the first channel state information is determined based on at least one of the following: Physical layer priority of HARQ-ACK information; A physical layer priority of the second channel state information; The physical layer priority indicated by the first control signaling.

17. The method according to claim 16, wherein: The sending the first channel state information to the second node includes: When a preset condition is met, sending the first channel state information to the second node, wherein the preset condition includes at least one of the following: The first node receives a second control signaling; The first node executes a predefined transmission behavior; The first node receives predefined service identification information.

18. The method according to claim 17, wherein: The second control signaling includes radio resource control RRC signaling, where the RRC signaling is used to configure configuration information of the first channel state information; The configuration information of the first channel state information includes at least one of the following parameters: A reporting type of the first channel state information; A time domain configuration and / or a frequency domain configuration of the first channel state information; The reference resource corresponding to the first channel state information.

19. The method according to claim 17, wherein: The second control signaling includes first downlink control information DCI signaling, where the first DCI signaling is DCI signaling obtained by scrambling using at least one of the following radio network temporary identifiers RNTI: Semi-static channel state information radio network temporary identifier CSI-RNTI; Cell radio network temporary identifier C-RNTI; Semi-static scheduling radio network temporary identifier CS-RNTI; Modulation and coding scheme cell radio network temporary identifier MCS-C-RNTI; A predefined RNTI used to activate or deactivate sending the first channel state information.

20. The method according to claim 17, wherein: The second control signaling includes a second DCI signaling, at least one field in the second DCI signaling is redefined, and the redefined field is used to activate or deactivate sending the first channel state information, and the at least one field includes: A DCI field for determining a hybrid automatic repeat request process identifier for a data channel; A DCI field for determining a redundant version of the data channel; A DCI field for determining time domain resource allocation of the data channel; A DCI field for determining frequency domain resource allocation of the data channel; A field used to indicate sending the second channel state information; A field used to indicate a sending type of the first channel state information; A field for selecting a non-periodic channel state information trigger state; A field used to indicate switching between the first channel state information and the second channel state information; A field for code block group indication; A field used to indicate whether the first channel state information is retransmitted data.

21. The method according to claim 17, wherein: The predefined transmission behavior includes at least one of the following: The first node receives a PDSCH decoding error; The first node receives and decodes the PDSCH correctly; The first node receives a PDSCH of a predefined HARQ process, wherein the predefined HARQ process is determined by the second control signaling; The first node receives the PDSCH within a predefined time window, wherein the length, period and offset of the predefined time window are determined by the second control signaling; The first node detects a wireless link failure; The first node performs beam switching; The first node performs transmission reception pair TRP switching.

22. The method according to claim 17, wherein: The predefined business identification information includes at least one of the following: Logical channel group identifier; Logical channel identifier.

23. A method for receiving channel state information, applied to a second node, the method comprising: Sending a first control signaling; Receive first channel state information sent by a first node, where the first channel state information is obtained based on a reference resource indicated by the first control signaling, and the first channel state information indicates at least one of the following feedback information: feedback information based on current transmission resources and feedback information used for retransmission scheduling.

24. The method according to claim 23, wherein: The feedback information based on the current transmission resource includes at least one of the following: a difference between a modulation and coding scheme MCS level configured by the second node and an MCS level obtained according to the reference resource; A difference between a signal-to-noise ratio SNR corresponding to the MCS level configured by the second node and an SNR corresponding to the MCS level obtained according to the reference resource; Interference intensity indication; An MCS level and a first table obtained according to the reference resource, wherein the first table includes a channel quality indication CQI table or an MCS table; Quantized channel state information, wherein the quantized channel state information includes at least one of the following: CQI information, a precoding matrix indicator, a rank indicator, a layer indicator, and SNR information.

25. The method according to claim 23, wherein: The feedback information used for retransmission scheduling includes at least one of the following: MCS level for retransmission; Retransmitted beam information; CQI table or MCS table used for retransmission; The SNR of the retransmission; a difference between the MCS level configured by the second node and the MCS level obtained according to the reference resource; A difference between an SNR corresponding to the MCS level configured by the second node and an SNR corresponding to the MCS level obtained according to the reference resource; The proportion of subbands corresponding to erroneous bits in the PDSCH transmitted by the second node.

26. The method of claim 23, wherein: The resource information of sending the first channel state information by the first node includes at least one of the following: Physical uplink control channel PUCCH; Physical uplink shared channel PUSCH.

27. The method according to claim 23, wherein: The first channel state information is sent by the first node when a first preset condition is met, and the preset condition includes at least one of the following: The first node receives the first control signaling; The first node executes a predefined transmission behavior; The first node receives predefined service identification information.

28. A communication device comprising a memory, a processor, and computer program instructions stored in the memory and executable on the processor, wherein: When the processor executes the computer program instructions, the method according to any one of claims 1 to 27 is implemented.

29. A computer-readable storage medium, wherein: The computer-readable storage medium comprises computer program instructions; wherein, when the computer program instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 27.

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