Channel state information feedback method, and terminal and network-side device

Abstract

The present application belongs to the technical field of wireless communications. Disclosed are a channel state information feedback method, and a terminal and a network-side device. The channel state information feedback method in the embodiments of the present application comprises: a terminal determining at least one target delay feedback associated with target multi-transmission reception point (multi-TRP, MTRP) CSI to be acquired; and the terminal acquiring and feeding back the target MTRP CSI on the basis of the at least one target delay feedback.

Description

Channel state information feedback method, terminal and network side equipment

[0001] Cross-references

[0002] This application claims priority to a Chinese patent application filed with the Patent Office of China on September 21, 2023, with application number 202311230225.1 and invention name “Channel State Information Feedback Method, Terminal and Network Side Device”. The entire contents of the application are incorporated by reference into this application. Technical Field

[0003] The present application belongs to the field of wireless communication technology, and specifically relates to a channel state information feedback method, terminal, and network-side equipment. Background Art

[0004] The Channel State Information (CSI) architecture can be divided into downlink CSI and uplink CSI. The downlink CSI architecture includes downlink physical channels and downlink reference signals; the uplink CSI architecture includes uplink physical channels and uplink reference signals.

[0005] The downlink physical channel is usually used to transmit data, and the downlink reference signal is usually used to perform channel estimation to obtain downlink channel state information (CSI). The uplink physical channel is usually used to transmit uplink data, and the uplink reference signal is usually used to perform channel estimation to obtain uplink channel state information (CSI).

[0006] Typically, the terminal can determine the CSI report through high-layer signaling or default rules. For example, the network-side device associates a reference signal resource configuration (CSI-ResourceConfig) for channel measurement, a reference signal resource configuration for CSI interference measurement (CSI-IM), or a reference signal resource configuration for a non-zero power CSI reference signal (Non-Zero Power CSI-RS) resource for each CSI report configuration (CSI-ReportConfig). The terminal obtains the corresponding channel information by measuring the reference resources associated with these resource configurations, thereby obtaining the corresponding CSI information based on the codebook configuration information and CSI report content associated with the CSI report configuration, and provides feedback based on the uplink channel.

[0007] However, in related technologies, for coordinated transmission between multiple Transmission Reception Points (TRPs), the coherent joint transmission (CJT) CSI obtained by a terminal can only provide feedback on a limited range of the delay offset between two TRPs. This cannot guarantee the performance of the CSI obtained by the terminal, nor can it guarantee the feedback performance of the delay information between multiple TRPs.

[0008] Summary of the Invention

[0009] The embodiments of the present application provide a channel state information feedback method, terminal and network side equipment, which can solve the problem of not being able to guarantee the performance of CSI obtained by the terminal, or not being able to guarantee the feedback performance of delay information between multiple TRPs.

[0010] In a first aspect, a channel state information feedback method is provided, including: a terminal determines at least one target delay feedback associated with a target multi-transmission reception point (multi-TRP, MTRP) CSI to be obtained; the terminal obtains and feeds back the target MTRP CSI based on the at least one target delay feedback.

[0011] In a second aspect, a method for feedback of channel state information is provided, including: a terminal determines a target delay indication associated with a target MTRP CSI to be obtained, wherein the target delay indication is associated with at least one target delay adjustment value; and the terminal obtains and feeds back the target MTRP CSI based on the target delay indication.

[0012] According to a third aspect, a method for feedback of delay information is provided, including: a terminal obtains and feeds back delay information between multiple TRPs based on the configuration of a network-side device; wherein the configuration of the network-side device includes one of the following: at least one first reference signal set, and the at least one first reference signal set is associated with multiple TRPs; multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs; a first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal for obtaining delay information in the first reference signal set, and the first reference signal set is associated with multiple TRPs.

[0013] In a fourth aspect, a method for acquiring channel state information is provided, including: a network side device indicating at least one target delay feedback associated with a target MTRP CSI to a terminal; and the network side device receiving the target MTRP CSI fed back by the terminal.

[0014] In a fifth aspect, a method for obtaining channel state information is provided, including: a network-side device sends a target delay indication corresponding to a target CSI reporting configuration to a terminal, wherein the target delay indication is associated with at least one target delay adjustment value, and the target CSI reporting configuration is a CSI reporting configuration associated with a target MTRP CSI; and the network-side device receives the target MTRP CSI fed back by the terminal.

[0015] In the sixth aspect, a method for obtaining delay information is provided, including: a network-side device sends configuration information to a terminal; the network-side device obtains the delay information between multiple TRPs fed back by the terminal; wherein the configuration information includes one of the following: at least one first reference signal set, and the at least one first reference signal set is associated with multiple TRPs; multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs; a first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal for obtaining delay information in the first reference signal set, and the first reference signal set is associated with multiple TRPs.

[0016] In the seventh aspect, a channel state information feedback device is provided, including: a first determination module, used to determine at least one target delay feedback associated with the target MTRP CSI to be obtained; a first feedback module, used to obtain and feedback the target MTRP CSI based on the at least one target delay feedback.

[0017] In an eighth aspect, a channel state information feedback device is provided, including: a second determination module for determining a target delay indication associated with a target MTRP CSI to be obtained, wherein the target delay indication is associated with at least one target delay adjustment value; and a second feedback module for obtaining and feeding back the target MTRP CSI based on the target delay indication.

[0018] In the ninth aspect, a delay information feedback device is provided, including: a first acquisition module, used to obtain the delay information between multiple TRPs based on the configuration of the network side device; a third feedback module, used to feedback the obtained delay information between the multiple TRPs; wherein the configuration of the network side device includes one of the following: at least one first reference signal set, and the at least one first reference signal set is associated with multiple TRPs; multiple first reference signal sets and a first indication, wherein the first indication is used to indicate the target reference signal set for obtaining delay information in the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs; one first reference signal set and a second indication, wherein the second indication is used to indicate the target reference signal for obtaining delay information in the first reference signal set, and the first reference signal set is associated with multiple TRPs.

[0019] In the tenth aspect, a device for acquiring channel state information is provided, including: a first indication module, used to indicate at least one target delay feedback associated with the target MTRP CSI to the terminal; and a first transceiver module, used to receive the target MTRP CSI fed back by the terminal.

[0020] In the eleventh aspect, a device for acquiring channel state information is provided, including: a second indication module, configured to send a target delay indication corresponding to a target CSI report configuration to a terminal, wherein the target delay indication is associated with at least one target delay adjustment value, and the target CSI report configuration is a CSI report configuration associated with a target MTRP CSI; and a second transceiver module, configured to receive the target MTRP CSI fed back by the terminal.

[0021] In the twelfth aspect, a device for obtaining delay information is provided, including: a third transceiver module, used to send configuration information to a terminal; a second acquisition module, used to obtain delay information between multiple TRPs fed back by the terminal; wherein the configuration information includes one of the following: at least one first reference signal set, and the at least one first reference signal set is associated with multiple TRPs; multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs; a first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal for obtaining delay information in the first reference signal set, and the first reference signal set is associated with multiple TRPs.

[0022] In the thirteenth aspect, a terminal is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented, or the steps of the method described in the third aspect are implemented.

[0023] In the fourteenth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the first aspect, or implement the steps of the method described in the second aspect, or implement the steps of the method described in the third aspect, and the communication interface is used to couple with the processor.

[0024] In the fifteenth aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the fourth aspect are implemented, or the steps of the method described in the fifth aspect are implemented, or the steps of the method described in the sixth aspect are implemented.

[0025] In the sixteenth aspect, a network side device is provided, comprising a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the fourth aspect, or to implement the steps of the method described in the fifth aspect, or to implement the steps of the method described in the sixth aspect, and the communication interface is used to couple with the processor.

[0026] In the seventeenth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented, or the steps of the method described in the third aspect are implemented, or the steps of the method described in the fourth aspect are implemented, or the steps of the method described in the fifth aspect are implemented, or the steps of the method described in the sixth aspect are implemented.

[0027] In aspect 18, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in aspect 1, or execute the steps of the method described in aspect 2, or execute the steps of the method described in aspect 3, and the network side device can be used to execute the steps of the method described in aspect 4, or execute the steps of the method described in aspect 5, or execute the steps of the method described in aspect 6.

[0028] In the nineteenth aspect, a chip is provided, comprising a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the steps of the method described in the first aspect, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect, or the steps of the method described in the fourth aspect, or the steps of the method described in the fifth aspect, or the steps of the method described in the sixth aspect.

[0029] In aspect 20, a computer program / program product is provided, which is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in aspect 1, or the steps of the method described in aspect 2, or the steps of the method described in aspect 3, or the steps of the method described in aspect 4, or the steps of the method described in aspect 5, or the steps of the method described in aspect 6.

[0030] In one solution provided in an embodiment of the present application, before obtaining the target MTRP CSI, the terminal determines at least one target delay feedback or an associated target delay indication associated with the target MTRP CSI, and then obtains and feeds back the target MTRP CSI based on the at least one target delay feedback or at least one target delay adjustment value associated with the target delay indication, thereby enabling feedback of the MTRP CSI when delay feedback is performed, thereby ensuring the feedback performance of the CSI. In another solution provided in an embodiment of the present application, the terminal can obtain and feed back delay information between multiple TRPs based on the configuration of the network-side device, thereby enabling delay feedback between multiple TRPs, thereby ensuring the feedback performance of the delay information between TRPs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 shows a block diagram of a wireless communication system to which embodiments of the present application may be applied;

[0032] FIG2 is a schematic diagram showing a flow chart of a method for feeding back channel state information in an embodiment of the present application;

[0033] FIG3 shows another flow chart of a method for feeding back channel state information in an embodiment of the present application;

[0034] FIG4 is a schematic flow chart showing a method for feeding back delay information in an embodiment of the present application;

[0035] FIG5 is a schematic diagram showing a flow chart of a method for acquiring channel state information in an embodiment of the present application;

[0036] FIG6 shows another flow chart of a method for acquiring channel state information in an embodiment of the present application;

[0037] FIG7 is a schematic flow chart showing a method for obtaining delay information in an embodiment of the present application;

[0038] FIG8 shows a schematic structural diagram of a channel state information feedback device in an embodiment of the present application;

[0039] FIG9 shows another schematic structural diagram of a channel state information feedback device in an embodiment of the present application;

[0040] FIG10 shows a schematic structural diagram of a device for feedback of delay information in an embodiment of the present application;

[0041] FIG11 shows a schematic structural diagram of a device for acquiring channel state information in an embodiment of the present application;

[0042] FIG12 shows another schematic structural diagram of a device for acquiring channel state information in an embodiment of the present application;

[0043] FIG13 shows a schematic structural diagram of a device for acquiring delay information in an embodiment of the present application;

[0044] FIG14 shows a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0045] FIG15 is a schematic diagram showing the hardware structure of a terminal provided in an embodiment of the present application;

[0046] FIG16 shows a schematic diagram of the hardware structure of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0048] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0049] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0050] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. thGeneration, 6G) communication system.

[0051] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (WLAN) access point (AS) or a wireless fidelity (WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home Evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0052] The core network equipment may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (MME), access mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data repository (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), application function ( It should be noted that in the embodiments of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0053] In order to better understand the technical solution provided by this application, the technology involved in this application is first introduced.

[0054] 1. CSI Architecture

[0055] Generally, the CSI architecture can be divided into two parts: downlink CSI and uplink CSI. The downlink CSI architecture includes downlink physical channels and downlink reference signals, while the uplink CSI architecture includes uplink physical channels and uplink reference signals.

[0056] The downlink physical channel is usually used to transmit data, and the downlink reference signal is usually used to perform channel estimation to obtain downlink channel state information (CSI). The uplink physical channel is usually used to transmit uplink data, and the uplink reference signal is usually used to perform channel estimation to obtain uplink channel state information (CSI).

[0057] In 5G systems, CSI is mainly used in Adaptive Beamforming and MIMO (Multiple Input Multiple Output) technologies to improve wireless transmission bandwidth and reliability.

[0058] In general, the 5G CSI architecture is a very important technology in 5G communication systems, playing an important role in improving wireless transmission bandwidth and reliability and interference coordination.

[0059] 2. CSI Report Content

[0060] Typically, the terminal may determine through higher layer signaling or default rules that the CSI report may include one of: 'none', 'cri-ri-pmi-cqi', 'cri-RI-i1', 'cri-RI-CQI', 'cri-RSRP', 'cri-SINR', 'ssb-Index-RSRP', 'ssb-Index-SINR' or 'cri-RI-LI-PMI-CQI'.

[0061] If the terminal is configured with CSI-ReportConfig and the upper-layer parameter reportQuantity is set to "none", the terminal will not report anything for CSI-ReportConfig.

[0062] 3. CSI Acquisition

[0063] The network associates each CSI report configuration (CSI-ReportConfig) with a reference signal resource configuration for channel measurement (CSI-ResourceConfig), a reference signal resource configuration for interference measurement associated with a CSI-IM (CSI interference measurement) resource, and / or a reference signal resource configuration for interference measurement associated with an NZP-CSI RS (non-zero power CSI-RS) resource. The terminal obtains the corresponding channel information by measuring the reference resources associated with these resource configurations. Currently, the corresponding channel information can generally be considered as baseband digital precoding matrix information and baseband modulation scheme recommendation information. The terminal further obtains the corresponding CSI information based on the codebook configuration information and report content associated with the CSI report configuration and based on uplink channel feedback.

[0064] For the feedback of the precoding matrix indicator (PMI) in the CSI information, if the Rel-15 Type 1 codebook configuration is used, the terminal measures up to eight channel measurement reference signals and selects one of them to feedback the PMI. If the Rel-15 Type 2 / Rel-16 Type 2 / Rel-17 codebook is used, the terminal measures one channel measurement reference signal and feedbacks the PMI associated with that reference signal. If the Rel-18 Type 2 coherent joint transmission (CJT) codebook is used, the terminal measures up to four channel measurement reference signals, assumes that the four reference signals are associated with four TRPs, and uses the channels associated with the four reference signals to obtain and feedback the PMI. If it is a Rel-18 Type2 prediction codebook, for periodic / semi-continuous channel measurement reference signals, the network side device configures one reference signal, and the terminal uses multiple transmission moments of one reference signal to obtain the predicted PMI. For non-periodic channel measurement reference signals, the network side device configures up to 12 reference signals. The 12 reference signals are sent at a certain interval in time, and the terminal uses one transmission moment of the 12 reference signals to obtain the predicted PMI.

[0065] If CJT CSI is obtained, the delay offset between the two TRPs that the terminal can feedback is generally 1 / B*N3, where B is the CSI reference signal bandwidth and N3 is the number of PMI subbands. This means that if the delay offset between the two TRPs exceeds this range, the performance of the PMI obtained by the terminal will deteriorate.

[0066] In addition, in the LTE system, since the Cell Reference Signal (CRS) is sent in every subframe, CRS can be used to achieve high-precision time-frequency tracking. However, in NR, this "always-on" reference signal is cancelled, and the reference signal for time-frequency tracking is flexibly configured according to the needs of the UE. This newly defined reference signal is called the Tracking Reference Signal (TRS). Generally, all Channel State Information Reference Signals (CSI-RS) for tracking can be called TRS, so in a sense, TRS can also be said to be a type of CSI-RS.

[0067] In the design of NR, TRS exists as a special CSI-RS. CSI-RS has flexible configuration and can flexibly increase the time-frequency density of the reference signal. When CSI-RS is sent in the form of a single port, it is in TRS mode. TRS is mainly used for timing estimation, delay spread estimation, frequency offset estimation, and Doppler spread estimation. Timing estimation and frequency offset estimation can be used to synchronize the transmitter and receiver. The results of delay spread estimation and Doppler spread estimation are important parameters for channel estimation and can be used to assist the demodulation reference signal (DMRS) to achieve more accurate channel estimation.

[0068] For TRS deployed on FR1 (low frequency), a UE can be configured with one or more TRS resource sets. Each TRS resource set contains 4 TRS resources, which exist in two consecutive time slots, and each time slot has 2 TRS resources. For TRS deployed on FR2 (high frequency), a UE can also be configured with one or more TRS resource sets. Among them, the TRS resources contained in a TRS resource set can only exist in one time slot, in which case there are only 2 TRS resources; and a TRS resource set can also contain 4 TRS resources, which are distributed in pairs in two consecutive time slots.

[0069] Therefore, in related technologies, the range of delay information between multiple CSI-RSs that CJT CSI can process is limited, and it cannot handle situations where the delay between TRPs is large. One solution is for the terminal to provide delay feedback between CJT TRPs. Therefore, how to provide delay feedback between CJT TRPs is a technical problem that needs to be solved in related technologies. In addition, if delay feedback between CJT TRPs exists, the delay information associated with CJT CSI will overlap. Therefore, how to provide CSI feedback when delay feedback between CJT TRPs exists is also a technical problem that needs to be solved in related technologies.

[0070] In response to the above technical problems, an embodiment of the present application provides a feedback solution for channel state information and a feedback solution for delay information.

[0071] The technical solutions provided by the embodiments of the present application are described in detail below through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0072] FIG2 illustrates a flow chart of a method for providing channel state information feedback according to an embodiment of the present application. Method 200 may be executed by a terminal. In other words, the method may be executed by software or hardware installed on the terminal. As shown in FIG2 , the method may include the following steps.

[0073] S210: The terminal determines at least one target delay feedback associated with the target MTRP CSI to be obtained.

[0074] In the embodiment of the present application, one target MTRP CSI acquisition is associated with at least one target delay feedback, that is, when the terminal acquires the MTRP CSI, it needs to refer to the delay of at least one delay feedback associated with the MTRP CSI.

[0075] Optionally, some or all of the methods of the embodiments of the present application can also be used to associate a target MTRP CSI acquisition with at least one target frequency shift feedback, that is, when the terminal acquires MTRP CSI, it can refer to the frequency shift of at least one frequency shift feedback associated with the MTRP CSI.

[0076] In the embodiment of the present application, the multi-TRP may be a TRP that performs CJT, and therefore, the MTRP CSI may also be referred to as CJT CSI.

[0077] In the embodiment of the present application, the MTRP CSI is CSI obtained through multiple reference signals. In an actual system, the present application can also be used for the MTRP CSI to be CSI obtained through multiple reference signal port groups.

[0078] S212: The terminal obtains and feeds back the target MTRP CSI based on the at least one target delay feedback.

[0079] For MTRP CSI acquisition, especially CJT CSI acquired and fed back by the terminal based on multiple CSI-RSs, the terminal can obtain the delay information between multiple CSI-RSs based on each CSI-RS and its associated quasi-co-location information. The delay information may include: at least one of the air interface propagation delay and the synchronization delay between multiple TRPs, wherein the multiple TRPs are associated with the multiple CSI-RSs.

[0080] Optionally, for MTRP CSI acquisition, especially CJT CSI acquired and fed back by the terminal based on multiple CSI-RS port groups, the terminal can obtain the delay information between multiple CSI-RS port groups based on each CSI-RS port group and its associated quasi-co-location information. The delay information may include: at least one of the air interface propagation delay and the synchronization delay between multiple TRPs, wherein the multiple TRPs are associated with the multiple CSI-RS port groups, and each CSI-RS port group is associated with at least one CSI-RS port. The multiple CSI-RS port groups are not limited to being obtained based on network high-layer signaling or determined by the terminal.

[0081] In particular, if the terminal has fed back delay feedback to the network at least once before the CJT CSI is obtained and fed back, the network-side device obtains all or part of the delay information between the multiple CSI-RSs. At this time, the terminal can eliminate part of the delay information that has been fed back when obtaining the delay information between the multiple CSI-RSs, or the terminal can eliminate the influence of the delay information that has been fed back when obtaining the CJT CSI associated with the multiple CSI-RSs, that is, the delay information reflected in the CJT CSI does not include the delay information that has been fed back. In this way, the applicable delay range of the CJT CSI fed back by the terminal can be improved, and it can also help the network-side device obtain more accurate delay information. This effectively improves the transmission efficiency and the user's experience rate. Furthermore, in this way, repeated feedback in the delay feedback associated with the MTRP CSI can be avoided, saving feedback overhead.

[0082] In summary, one target MTRP CSI acquisition is associated with at least one target delay feedback. That is, when the target MTRP CSI is acquired, it is necessary to refer to the delay of at least one target delay feedback associated with the target MTRP CSI.

[0083] An optional approach is to associate a target MTRP CSI acquisition with a target delay feedback, and the delay information between TRPs required for the target MTRP CSI acquisition can be obtained through the target delay feedback. In other words, when the target delay feedback is provided, the terminal at least provides the delay information required for the target MTRP CSI acquisition.

[0084] Another optional method is to associate a target MTRP CSI acquisition with a target delay feedback, and the delay information between the partial TRPs required for reference by the target MTRP CSI acquisition can be obtained through the target delay feedback. In other words, when the target delay feedback is provided, the terminal feeds back the partial delay information required for the target MTRP CSI acquisition.

[0085] Another optional method is: one MTRP CSI acquisition is associated with multiple target delay feedbacks, and the delay information between TRPs that the MTRP CSI acquisition needs to refer to can be obtained through the multiple target delay feedbacks. In other words, during one of the at least one target delay feedbacks, the terminal only feeds back part of the delay information required for MTRP CSI acquisition. For example: the network-side device triggers the terminal to complete two delay feedbacks. The first delay feedback feeds back the delay information between TRP1, TRP2, and TRP3. The second delay feedback feeds back the delay information between TRP3 and TRP4. Subsequently, the network-side device triggers a CJT CSI report. The CJT CSI report is associated with three CSI-RSs, which are associated with TRP1, TRP2, and TRP4 respectively. When the CJT CSI is acquired, it can refer to the two delay feedbacks, and the terminal obtains the delay information between TRP1, TRP2, and TRP4.

[0086] In an optional implementation, the terminal determines that the at least one target delay feedback associated with the target MTRP CSI to be obtained may include: when a first CSI report configuration is associated with multiple CSI reference signals CSI-RS, the multiple CSI-RS are used to obtain the target MTRP CSI, and the multiple CSI-RS have a first association relationship with the at least one target delay feedback, determining that the target MTRP CSI is associated with the at least one target delay feedback. In this optional implementation, if there is a first CSI report configuration associated with multiple CSI-RSs and used to obtain the target MTRP CSI, and the multiple CSI-RSs have a first association relationship with at least one target delay feedback, then the obtained target MTRP CSI is associated with the at least one target delay feedback, for example, the obtained target MTRP CSI does not include the delay fed back by the terminal during the at least one target delay feedback.

[0087] Optionally, the first association relationship is generally established through high-layer signaling, and the first association relationship may include one of the following:

[0088] 1. A first TRS set is associated with a plurality of CSI-RS-associated CSI-RS sets, and the first TRS set is associated with the target delay feedback once.

[0089] For example, the CSI-RS set configuration signaling associated with the target MTRP CSI may include an indication message, which can be used to associate with a first TRS set. Furthermore, the terminal may associate with a target latency feedback request based on the first TRS set. Optionally, the indication message includes a TRS set ID. Optionally, the first TRS set is associated with a CSI reporting configuration (for reporting latency information), and the TRS set is the TRS set associated with the CSI reporting configuration.

[0090] 2. Multiple second TRS sets are associated with the CSI-RS sets associated with multiple CSI-RSs, and the multiple second TRS sets are associated with one target delay feedback.

[0091] For example, an indication information is associated in the CSI-RS set configuration signaling associated with the target MTRP CSI, and multiple second TRS sets can be associated through the indication information. Further, the terminal is associated with a delay feedback according to the multiple second TRS sets. Optionally, the indication information includes multiple TRS set IDs or multiple TRS IDs. Optionally, the multiple TRS sets are associated with a CSI report configuration (report delay information), and the multiple TRS sets are TRS sets associated with the CSI report configuration.

[0092] 3. Multiple CSI-RS-associated CSI-RS sets are associated with multiple second TRS sets, and the multiple second TRS sets are associated with multiple target delay feedbacks.

[0093] For example, the CSI-RS set configuration signaling associated with the target MTRP CSI may include an indication message, which may be used to associate with multiple second TRS sets. Furthermore, the terminal may associate with multiple delay feedbacks based on the multiple second TRS sets. Optionally, the indication message may include multiple TRS set IDs or multiple TRS IDs. Optionally, the multiple second TRS sets may be associated with multiple CSI report configurations (report delay information), and the multiple TRS sets may be TRS sets associated with the multiple CSI report configurations.

[0094] 4. At least one CSI reporting configuration is associated with a CSI-RS set associated with multiple CSI-RSs, and the at least one first CSI reporting configuration is associated with at least one target delay feedback.

[0095] For example, the CSI-RS set configuration signaling associated with the target MTRP CSI may include an indication message, which may be associated with at least one CSI reporting configuration. Furthermore, the terminal may be associated with at least one delay feedback according to the at least one CSI reporting configuration. Optionally, the indication message may include multiple CSI reporting configuration IDs.

[0096] 5. In the multiple CSI-RS associations, each CSI-RS is associated with a TRS or a TRS set, and the multiple TRSs or TRS sets associated with the multiple CSI-RSs are associated with at least one target delay feedback.

[0097] For example, the target MTRP CSI includes multiple CSI-RS configuration signaling, where each CSI-RS configuration signaling is associated with an indication information, which can be associated with a TRS set or a TRS through the indication information. Furthermore, the terminal is associated with at least one delay feedback based on the multiple TRS sets or multiple TRSs. Optionally, the indication information includes multiple TRS set IDs or multiple TRS IDs. Optionally, the multiple TRS sets or multiple TRSs are associated with at least one CSI report configuration (report delay information).

[0098] 6. In the multiple CSI-RS associations, each CSI-RS is associated with a physical cell identifier (Physical Cell Identifier or Physical-layer Cell Identity, PCI), and the multiple PCIs associated with the multiple CSI-RS associations are associated with at least one target delay feedback.

[0099] For example, the target MTRP CSI includes multiple CSI-RS configuration signalings, where each CSI-RS configuration signaling is associated with one PCI indication information. Through multiple PCI indication information, the terminal can be associated with at least one TRS set or at least one CSI report configuration (CSI report configuration for reporting delay information). Furthermore, the terminal is associated with at least one delay feedback according to the at least one TRS set or at least one CSI report configuration.

[0100] In another optional implementation, the terminal determines the at least one associated target delay feedback using a second CSI reporting configuration associated with the MTRP CSI. For example, if a second CSI reporting configuration exists for obtaining the target MTRP CSI, and a second association exists between the CSI reporting configuration and the at least one target delay feedback, the obtained MTRP CSI does not include the delay fed back by the terminal during the at least one target delay feedback.

[0101] Optionally, the second association relationship may be established through higher layer signaling.

[0102] Optionally, the second association relationship may include one of the following:

[0103] (1) The second CSI reporting configuration is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback.

[0104] For example, the second CSI reporting configuration associated with the target MTRP CSI is associated with an indication information. Through the indication information, the terminal can be associated with at least one CSI reporting configuration (CSI reporting configuration for reporting delay information). Further, the terminal can be associated with at least one target delay feedback according to the at least one CSI reporting configuration.

[0105] (2) The second CSI reporting configuration is associated with at least one PCI, and the at least one PCI is associated with the at least one target delay feedback.

[0106] For example, an indication information is associated with the second CSI reporting configuration associated with the target MTRP CSI. The terminal obtains at least one PCI through the indication information. The terminal can be associated with at least one CSI reporting configuration (CSI reporting configuration for reporting delay information) through the PCI. Further, the terminal is associated with at least one delay feedback according to the at least one CSI reporting configuration.

[0107] In an optional implementation, for MTRP CSI acquisition, the terminal may need to consider the frequency shift information between multiple CSI-RS or multiple TRPs, and the above-mentioned method for determining the delay information may be used to determine the frequency shift information. The frequency shift information may include: at least one of the frequency shift offset between multiple TRPs and the frequency shift of multiple TRPs. That is, the terminal determines that the at least one target frequency shift feedback associated with the target MTRP CSI to be acquired may include: when a first CSI report configuration is associated with multiple CSI reference signals CSI-RS, the multiple CSI-RS are used to acquire the target MTRP CSI, and the multiple CSI-RS are associated with the at least one target frequency shift feedback, determining that the target MTRP CSI is associated with the at least one target frequency shift feedback. Alternatively, the terminal determines the associated at least one target frequency shift feedback through a second CSI report configuration associated with the MTRP CSI, and when the CSI report configuration is associated with the at least one target frequency shift feedback, a second association relationship exists.

[0108] In one possible implementation, when acquiring the target MTRP CSI, the terminal may acquire a target PMI in the target MTRP CSI based on the at least one target delay feedback, and the target PMI may satisfy one of the following:

[0109] (1) The target PMI does not include a delay indication between multiple reference signals.

[0110] Among them, multiple reference signals can be associated with multiple TRPs, and the target PMI does not include the delay indication between multiple TRPs.

[0111] For example, if there is a CSI report setting associated with multiple CSI-RSs and used to obtain the target CJT CSI, and the multiple CSI-RSs have a first association relationship with the at least one target delay feedback, or the CSI report setting has a second association relationship with the at least one delay feedback, the CJT PMI associated with the target CJT CSI does not include the delay indication between TRPs (i 1,9 For example, if the higher layer signaling codebookMode is configured as 'mode1', the CJT PMI does not include or is not associated with at least one CSI-RS-associated delay offset or frequency domain basis vector offset or offset i selected by the terminal. 1,9 For another example, when the first association relationship or the second association relationship exists, the terminal does not support the high-layer signaling codebookMode configuration as 'mode1', and only supports the high-layer signaling codebookMode configuration as 'mode2'.

[0112] (2) The target PMI includes delay indications of some reference signals among multiple reference signals.

[0113] For example, the CJT PMI associated with the target CJT CSI includes a time delay indication between some TRPs (i 1,9 ), the partial TRP is the partial TRP that is not associated with any delay feedback. For example, there is a CSI report setting associated with 4 CSI-RSs associated with TRP1 / 2 / 3 / 4 respectively. According to the association relationship between the CSI report setting and the delay feedback, the terminal is associated with the delay information between TRP1 / 2 / 3 previously fed back. At this time, if the delay indication (i 1,9 ) is not associated with TRP4, the terminal needs to feedback the delay indication associated with TRP4 (i 1,9 ), at this time, the delay indication is only associated with one offset. If the reference CSI-RS is associated with TRP4, the terminal needs to feedback the delay indication associated with TRP1 or 2 or 3 (i 1,9 ) or TRP4 associated delay indication (i 1,9 ), in this case, the delay indication is only associated with one offset.

[0114] (3) The target PMI includes a delay indication associated with a first reference signal among the multiple reference signals, wherein the first reference signal is not associated with any delay feedback and the first reference signal is a partial reference signal among the multiple reference signals.

[0115] (4) The target PMI includes a delay indication of a second reference signal among the multiple reference signals, wherein the time interval from the most recent delay feedback associated with the second reference signal to the first time is greater than a specific value, wherein the first time may include one of the following: the feedback time of the MTRP CSI, the time corresponding to the CSI reference resource associated with the MTRP CSI, and the CSI reference time slot associated with the MTRP CSI; the specific value is a value agreed upon by the protocol, a value indicated by the network, or a value fed back by the terminal; and the second reference signal is a partial reference signal among the multiple reference signals.

[0116] The CSI reference resource (CSI reference resource) or CSI reference time slot (CSI reference slot) can be one of the following indicated by the network side device or agreed upon by the protocol: a downlink time slot, an uplink time slot, a downlink symbol, an uplink symbol, and a time.

[0117] (5) The indication ranges associated with the delay indications of the respective reference signals in the multiple reference signals included in the target PMI are not completely the same.

[0118] For example, when some reference signals are not associated with any delay feedback, the indication range of the delay indication associated with these reference signals is larger. When some reference signals are associated with delay feedback, the indication range of the delay indication associated with these reference signals is smaller. In this way, the overhead of the delay indication can be reduced.

[0119] For another example, when the feedback time of the delay feedback associated with some reference signals exceeds a certain threshold (i.e., too long) or is too far away from the MTRP CSI report, the indication range of the delay indication associated with these reference signals is larger, and the indication range of the delay indication associated with the remaining reference signals is smaller. In this way, the overhead of the delay indication can be reduced.

[0120] (6) The target PMI does not include a delay indication of a third reference signal among the multiple reference signals, wherein the most recent delay feedback associated with the third reference signal is located after a second time, wherein the second time may include one of the following: a time corresponding to a CSI reference resource associated with the MTRP CSI, a CSI reference time slot associated with the MTRP CSI, and the third reference signal is a partial reference signal among the multiple reference signals. The CSI reference resource (CSI reference resource) or CSI reference time slot (CSI reference slot) may be one of the following indicated by a network-side device or agreed upon by a protocol: a downlink time slot, an uplink time slot, a downlink symbol, an uplink symbol, or a moment.

[0121] In an optional implementation, the terminal acquiring the target MTRP CSI based on the at least one target delay feedback may include:

[0122] The terminal obtains, based on the at least one target delay feedback, the target MTRP CSI, wherein the obtained target MTRP CSI does not include or is not associated with the delay fed back by the terminal in the at least one target delay feedback; wherein the at least one target delay feedback includes at least one of the following:

[0123] First delay feedback, the first delay feedback including: at least one most recent delay feedback before a third time;

[0124] The second delay feedback includes: at least one delay feedback associated with a specific reference signal received most recently before a third time, where the specific reference signal is a reference signal used to obtain at least one delay feedback.

[0125] The third time includes one of the following: a time corresponding to a CSI reference resource associated with the target MTRP CSI, or a CSI reference time slot associated with the target MTRP CSI. For example, the third time may be one of the following: a time corresponding to a CSI reference resource associated with the first CSI reporting configuration, or a CSI reference time slot associated with the first CSI reporting configuration, or a time corresponding to a CSI reference resource associated with the second CSI reporting configuration, or a CSI reference time slot associated with the second CSI reporting configuration.

[0126] The above optional implementation method can also be used for the terminal to obtain the target MTRP CSI based on the at least one target frequency shift feedback. That is, the terminal obtains the target MTRP CSI based on the at least one target frequency shift feedback, wherein the obtained target MTRP CSI needs to refer to the frequency shift or frequency shift offset fed back by the terminal in the at least one target frequency shift feedback; wherein the at least one target frequency shift feedback includes at least one of the following:

[0127] first frequency shift feedback, the first frequency shift feedback comprising: at least one most recent frequency shift feedback before a third time;

[0128] The second frequency shift feedback includes: at least one frequency shift feedback associated with a specific reference signal received most recently before a third time, where the specific reference signal is a reference signal used to obtain at least one frequency shift feedback.

[0129] The third time includes one of the following: a time corresponding to a CSI reference resource associated with the target MTRP CSI, or a CSI reference time slot associated with the target MTRP CSI. For example, the third time may be one of the following: a time corresponding to a CSI reference resource associated with the first CSI reporting configuration, or a CSI reference time slot associated with the first CSI reporting configuration, or a time corresponding to a CSI reference resource associated with the second CSI reporting configuration, or a CSI reference time slot associated with the second CSI reporting configuration.

[0130] In an optional implementation, before S210, the method may further include one of the following steps:

[0131] In step a, the terminal obtains and feeds back delay information based on at least one first reference signal set configured by a network-side device;

[0132] The at least one first reference signal set is associated with multiple TRPs. For example, the network side configures N reference signal sets (N is greater than or equal to 1), and the terminal obtains and feeds back delay information based on the N reference signal sets.

[0133] In step b, the terminal obtains and feeds back delay information based on multiple first reference signal sets and a first indication configured by a network-side device, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the multiple first reference signal sets.

[0134] The multiple first reference signal sets are associated with multiple TRPs. For example, the network side device configures N reference signal sets (N is greater than 1) and a first indication, where the first indication is used to indicate the reference signal set associated with the delay information obtained and fed back by the terminal.

[0135] In step c, the terminal obtains and feeds back delay information based on a first reference signal set and a second indication configured by a network-side device, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information.

[0136] For example, the network-side device configures one reference signal set and a second indication, where the second indication is used to indicate a reference signal associated with delay information acquired and fed back by the terminal.

[0137] Steps a, b, and c in the above optional implementation may also be used by the terminal to obtain and feed back frequency shift information. For example, the terminal obtains and feeds back frequency shift information based on at least one first reference signal set configured by the network-side device.

[0138] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the multiple first reference signal sets may satisfy at least one of the following:

[0139] (1) The PCIs associated with the multiple first reference signal sets are not completely the same; that is, the PCIs associated with each of the multiple first reference signal sets may be different.

[0140] (2) The plurality of first reference signal sets are transmitted in consecutive time slots. That is, the reference signals in the plurality of first reference signal sets are transmitted in consecutive time slots. Optionally, the consecutive time slots may be consecutive downlink time slots.

[0141] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the method may further include: the terminal feeds back first capability information to the network side device, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and the two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0142] For example, reference signal set 1 is associated with a time slot offset 1, reference signal set 2 is associated with a time slot offset 2, reference signal set 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3. Then, at this time, the value of time slot offset 2 - time slot offset 1 is not greater than the first time slot interval, and the value of time slot offset 3 - time slot offset 2 is not greater than the first time slot interval.

[0143] For another example, reference signal set 1 is associated with a time slot offset 1, reference signal set 2 is associated with a time slot offset 2, reference signal set 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3, then at this time, the value of time slot offset 3 - time slot offset 1 is not greater than the first time slot interval.

[0144] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0145] (1) The PCIs associated with all the reference signals are not exactly the same; that is, the PCIs associated with the various reference signals in the first reference signal set may be different.

[0146] (2) The power control offsets associated with all the reference signals are not exactly the same. For example, the powerControlOffsetSS or powerControlOffset associated with each reference signal in the first reference signal set may be different.

[0147] In an optional implementation, when the at least one first reference signal set includes a first reference signal set, a reference signal in the first reference signal set is allowed to be used as a delay-related quasi-co-site reference signal. For example, if a network-side device configures a terminal to obtain delays of multiple reference signals based on multiple reference signals in a reference signal set (TRS set), the multiple reference signals can be used as quasi-co-site reference signals for other signals (CSI-RS, DMRS, PDSCH), and the parameters associated with the quasi-co-site type are delay-related parameters.

[0148] Optionally, a reference signal in the first reference signal set is not allowed to be used as a Doppler-related quasi-co-site reference signal.

[0149] Optionally, a reference signal in the first reference signal set is not associated with a second reference signal set, where the reference signals in the second reference signal set are used to provide Doppler-related quasi-co-location information. In other words, a reference signal in the first reference signal set cannot be associated with other reference signal sets, where reference signals in other reference signal sets can be used to provide Doppler-related quasi-co-location information (average delay and / or delay spread).

[0150] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, the method further includes:

[0151] The terminal feeds back second capability information to the network side device, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports the transmission of multiple reference signals associated with the same time slot, whether the terminal supports the transmission of multiple reference signals associated with the same symbol, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and two reference signals with the farthest interval among the multiple reference signals.

[0152] For example, reference signal 1 is associated with a time slot offset 1, reference signal 2 is associated with a time slot offset 2, reference signal 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3. Then, at this time, the value of time slot offset 2 - time slot offset 1 is not greater than the second time slot interval, and the value of time slot offset 3 - time slot offset 2 is not greater than the second time slot interval.

[0153] For another example, reference signal 1 is associated with a time slot offset 1, reference signal 2 is associated with a time slot offset 2, reference signal 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3. At this time, the value of time slot offset 3 - time slot offset 1 is not greater than the second time slot interval.

[0154] The technical solutions provided in the embodiments of this application establish a correlation between MTRP CSI and latency feedback, thereby increasing the applicable latency range of MTRP CSI reported by the terminal and helping network devices obtain more accurate latency information. This effectively improves transmission efficiency and user experience rate.

[0155] FIG3 shows another flow diagram of a method for feeding back channel state information according to an embodiment of the present application. Method 300 can be executed by a terminal. In other words, the method can be executed by software or hardware installed on the terminal. As shown in FIG3 , the method may include the following steps.

[0156] S310: The terminal determines a target delay indication associated with a target MTRP CSI to be obtained, wherein the target delay indication is associated with at least one target delay adjustment value.

[0157] In an embodiment of the present application, the target delay indication may be sent by a network-side device, and the target delay indication is associated with at least one delay adjustment value. The terminal may obtain the target MTRP CSI based on the delay adjustment value.

[0158] S312: The terminal obtains and feeds back the target MTRP CSI based on the target delay indication.

[0159] For example, the network side device indicates to the terminal through signaling (not limited to DCI or MAC CE or RRC signaling) multiple delay adjustment values ​​that need to be considered or adjusted when calculating the current MTRP CSI. The number of delay adjustment values ​​can be equal to the number of CSI-RS associated with the MTRP CSI minus 1, where one CSI-RS is a reference CSI-RS. For the delay associated with the CSI-RS other than the reference CSI-RS, the terminal subtracts the corresponding adjustment value to further obtain the MTRP CSI.

[0160] The reference CSI-RS may be the first of multiple CSI-RSs configured by the network, or the CSI-RS with the smallest associated delay, or a CSI-RS indicated by the network, or a CSI-RS indicated by the terminal.

[0161] The correspondence between the CSI-RS and the delay may be performed according to the configuration order of the CSI-RS after excluding the reference CSI-RS, that is, the CSI-RS of the first non-reference CSI-RS is associated with the first adjustment value, the CSI-RS of the second non-reference CSI-RS is associated with the second adjustment value, and so on.

[0162] The method of the embodiment of the present application can also be used by a terminal to determine a target frequency shift indicator associated with a target MTRP CSI to be acquired, wherein the target frequency shift indicator is associated with at least one target frequency shift value. Based on the target frequency shift indicator, the terminal acquires and feeds back the target MTRP CSI.

[0163] For example, the network side device indicates to the terminal through signaling (not limited to DCI or MAC CE or RRC signaling) multiple frequency shift values ​​that need to be considered or adjusted when calculating the current MTRP CSI. When the terminal obtains the MTRP CSI, it performs pre-compensation based on the multiple frequency shift values ​​and further obtains the MTRP CSI. The correspondence between the CSI-RS and the frequency shift can be based on the configuration order of the CSI-RS, that is, the first CSI-RS is associated with the first frequency shift value, the second CSI-RS is associated with the second frequency shift value, and so on.

[0164] Through the technical solutions provided in the embodiments of the present application, a terminal obtains and feeds back the target MTRP CSI by obtaining a target delay indication, thereby flexibly adjusting the delay range or magnitude associated with the delay information associated with the MTRP CSI fed back by the terminal. Furthermore, if the technical solution is used for a terminal to obtain and feed back the target MTRP CSI by obtaining a target frequency shift indication, flexibility can also be improved.

[0165] In an optional implementation, the terminal determines that the target delay indication associated with the target MTRP CSI to be acquired may include at least one of the following:

[0166] (1) The terminal obtains a first delay indication, where the first delay indication is used to indicate a set of delay adjustment values ​​associated with a target CSI reporting configuration, where the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI.

[0167] Optionally, before S310, the method may further include: the terminal acquiring multiple groups of delay adjustment values, wherein each group of target delay adjustment values ​​is associated with a CSI report configuration.

[0168] For example, the network-side device notifies the terminal of multiple groups of delay adjustment values ​​through high-layer signaling or MAC-CE, and then sends a first delay indication for indicating one group of delay adjustment values, and the CSI report associated with the MTRP CSI is set to be associated with one group of delay adjustment values.

[0169] (2) The terminal obtains a second delay indication, where the second delay indication is used to indicate at least one delay adjustment value associated with a target CSI reporting configuration, and the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI.

[0170] Optionally, before S310, the method may further include: the terminal acquiring multiple delay adjustment values, wherein each delay adjustment value is associated with a CSI report configuration.

[0171] For example, the network side device notifies the terminal of multiple delay adjustment values ​​through high-layer signaling or MAC-CE, and the CSI report configuration associated with the MTRP CSI is associated with at least one of the delay adjustment values, wherein each associated delay adjustment value comes from the multiple delay adjustment values ​​notified by the network.

[0172] The target delay indication includes at least one of the following: the first delay indication and the second delay indication.

[0173] In an optional implementation, in S312, the terminal obtaining the target MTRP CSI based on the target delay indication may include: the terminal obtaining the target MTRP CSI based on the target delay indication, wherein the delay value in the obtained target MTRP CSI is the difference between the target delay associated with at least one reference signal and the at least one target delay adjustment value.

[0174] In the above implementation, for an MTRP CSI acquisition, the delay indication associated with the MTRP CSI can be referenced. The delay indication can be indicated by the network. Furthermore, in order to improve flexibility, the network can pre-indicate multiple groups of delay adjustment values ​​or multiple delay adjustment values. The network selects or activates at least one group of delay adjustment values ​​or at least one delay adjustment value through signaling. Furthermore, based on the selected or activated at least one group of delay adjustment values ​​or at least one delay adjustment value, the network can associate at least one group of delay adjustment values ​​or at least one delay adjustment value with the MTRP CSI. Through the selection or activation process, the network can flexibly control the delay indication associated with the MTRP CSI.

[0175] If a process for obtaining a frequency shift indication exists, the network device may pre-indicate multiple sets of frequency shift values ​​or multiple frequency shift values. The network device selects or activates at least one set of frequency shift values ​​or at least one frequency shift value through signaling. Through this selection or activation process, the network device can flexibly control the frequency shift associated with the MTRP CSI.

[0176] In an optional manner, the network notifies the terminal of multiple groups of delay adjustment values ​​through higher-layer signaling or MAC-CE. When the network triggers or activates the CSI report setting associated with the MTRP CSI, the network associates or indicates one of the groups of delay adjustment values ​​with the CSI report setting through signaling. The group of delay adjustment values ​​includes at least one delay adjustment value, and the terminal obtains the MTRP CSI based on the delay adjustment value.

[0177] Another optional approach: The network notifies the terminal of multiple delay adjustment values ​​through higher-layer signaling or MAC-CE. When the network triggers or activates the CSI report setting associated with the MTRP CSI, the network associates or indicates at least one of the delay adjustment values ​​with the CSI report setting through signaling. The terminal obtains the MTRP CSI based on the delay adjustment value.

[0178] By adopting the technical solution provided in the embodiment of the present application, the network side device indicates the delay adjustment value to the terminal, so that the network side device can flexibly adjust the delay range or size associated with the delay information associated with the MTRP CSI feedback of the terminal, thereby improving the flexibility of the network side device.

[0179] FIG4 illustrates a flow chart of a method for providing feedback of delay information according to an embodiment of the present application. Method 400 may be executed by a terminal. In other words, the method may be executed by software or hardware installed on the terminal. As shown in FIG4 , the method may include the following steps.

[0180] S410, the terminal obtains the delay information between multiple TRPs based on the configuration of the network side device.

[0181] The configuration of the network side device includes one of the following:

[0182] (1) at least one first reference signal set, wherein the at least one first reference signal set is associated with a plurality of TRPs;

[0183] (2) multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information among the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs;

[0184] (3) A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

[0185] S412: The terminal feeds back the obtained delay information between multiple TRPs to the network side device.

[0186] Through the technical solution provided in the embodiment of the present application, the terminal can obtain and feedback the delay information between multiple TRPs based on the configuration of the network side device, thereby realizing delay feedback between multiple TRPs.

[0187] The technical solution in the above embodiment can also be used by a terminal to obtain and feed back frequency shift information. For example, the terminal obtains and feeds back frequency shift information based on at least one first reference signal set configured by a network-side device.

[0188] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the multiple reference signal sets may satisfy at least one of the following:

[0189] (1) The PCIs associated with the multiple first reference signal sets are not completely the same; that is, the PCIs associated with each of the multiple first reference signal sets may be different.

[0190] (2) The plurality of first reference signal sets are transmitted in consecutive time slots. That is, the reference signals in the plurality of first reference signal sets are transmitted in consecutive time slots. Optionally, the consecutive time slots may be consecutive downlink time slots.

[0191] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the method may further include: the terminal feeds back first capability information to the network side device, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and the two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0192] For example, reference signal set 1 is associated with a time slot offset 1, reference signal set 2 is associated with a time slot offset 2, reference signal set 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3. Then, at this time, the value of time slot offset 2 - time slot offset 1 is not greater than the first time slot interval, and the value of time slot offset 3 - time slot offset 2 is not greater than the first time slot interval.

[0193] For another example, reference signal set 1 is associated with a time slot offset 1, reference signal set 2 is associated with a time slot offset 2, reference signal set 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3, then at this time, the value of time slot offset 3 - time slot offset 1 is not greater than the first time slot interval.

[0194] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0195] (1) The PCIs associated with all the reference signals are not exactly the same; that is, the PCIs associated with the various reference signals in the first reference signal set may be different.

[0196] (2) The power control offsets associated with all the reference signals are not exactly the same. For example, the powerControlOffsetSS or powerControlOffset associated with each reference signal in the first reference signal set may be different.

[0197] In an optional implementation, when the at least one first reference signal set includes a first reference signal set, a reference signal in the first reference signal set is allowed to be used as a delay-related quasi-co-site reference signal. For example, if a network-side device configures a terminal to obtain delays of multiple reference signals based on multiple reference signals in a reference signal set (TRS set), the multiple reference signals can be used as quasi-co-site reference signals for other signals (CSI-RS, DMRS, PDSCH), and the parameters associated with the quasi-co-site type are delay-related parameters.

[0198] Optionally, a reference signal in the first reference signal set is not associated with a second reference signal set, where the reference signals in the second reference signal set are used to provide Doppler-related quasi-co-location information. In other words, a reference signal in the first reference signal set cannot be associated with other reference signal sets, where reference signals in other reference signal sets can be used to provide Doppler-related quasi-co-location information (average delay and / or delay spread).

[0199] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, the method further includes:

[0200] The terminal feeds back second capability information to the network side device, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports the transmission of multiple reference signals associated with the same time slot, whether the terminal supports the transmission of multiple reference signals associated with the same symbol, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and two reference signals with the farthest interval among the multiple reference signals.

[0201] For example, reference signal 1 is associated with a time slot offset 1, reference signal 2 is associated with a time slot offset 2, reference signal 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3. Then, at this time, the value of time slot offset 2 - time slot offset 1 is not greater than the second time slot interval, and the value of time slot offset 3 - time slot offset 2 is not greater than the second time slot interval.

[0202] For another example, reference signal 1 is associated with a time slot offset 1, reference signal 2 is associated with a time slot offset 2, reference signal 3 is associated with a time slot offset 3, and time slot offset 1 < time slot offset 2 < time slot offset 3. At this time, the value of time slot offset 3 - time slot offset 1 is not greater than the second time slot interval.

[0203] Figure 5 illustrates a flow chart of a method for acquiring channel state information according to an embodiment of the present application. Method 500 can be executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. It should be noted that method 500 is the execution step of the network-side device corresponding to method 200. The following embodiments only describe the operation of the network-side device. For other matters not covered, please refer to the above description of method 200.

[0204] As shown in FIG5 , the method may include the following steps.

[0205] S510: The network-side device indicates to the terminal at least one target delay feedback associated with the target MTRP CSI.

[0206] Optionally, in an embodiment of the present application, part or all of the methods of the embodiments of the present application can also be used to associate a target MTRP CSI acquisition with at least one target frequency shift feedback, that is, the network side device can also indicate to the terminal at least one target frequency shift feedback associated with the target MTRP CSI, and when the terminal acquires MTRP CSI, it can refer to the frequency shift of at least one target frequency shift feedback associated with the MTRP CSI.

[0207] In an optional implementation, the network side device can indicate to the terminal at least one target delay feedback associated with the target MTRP CSI by configuring or establishing a first association relationship, wherein the first association relationship is that multiple CSI reference signals CSI-RS associated with the first CSI report configuration are associated with the at least one target delay feedback, and the multiple CSI-RS are used to obtain the target MTRP CSI.

[0208] Optionally, the first association relationship may include one of the following:

[0209] (1) The CSI-RS sets associated with the multiple CSI-RSs are associated with a first tracking reference signal TRS set, and the first TRS set is associated once with the target delay feedback;

[0210] (2) The CSI-RS sets associated with the multiple CSI-RSs are associated with multiple second TRS sets, and the multiple second TRS sets are associated with the at least one target delay feedback;

[0211] (3) The CSI-RS set associated with the multiple CSI-RSs is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback;

[0212] (4) Each of the multiple CSI-RSs is associated with a TRS or a TRS set, and the multiple TRSs or multiple TRS sets associated with the multiple CSI-RSs are associated with the at least one target delay feedback;

[0213] (5) Each of the multiple CSI-RSs is associated with a physical cell identifier (PCI), and the multiple PCIs associated with the multiple CSI-RSs are associated with the at least one target delay feedback.

[0214] In another optional implementation, the network-side device may also indicate to the terminal at least one target delay feedback associated with the target MTRP CSI by configuring or establishing a second association relationship, wherein the second association relationship is an association between a second CSI report configuration and the at least one target delay feedback, and the second CSI report is used to obtain the target MTRP CSI.

[0215] Optionally, the second association relationship may include one of the following:

[0216] (1) The second CSI reporting configuration is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback;

[0217] (2) The second CSI reporting configuration is associated with at least one PCI, and the at least one PCI is associated with the at least one target delay feedback.

[0218] In an embodiment of the present application, the network side device may also adopt a similar method to indicate to the terminal at least one target delay feedback associated with the target MTRP CSI. For example, the at least one target frequency shift feedback associated with the target MTRP CSI may be indicated to the terminal by configuring or establishing a first association relationship, wherein the first association relationship is that multiple CSI reference signals CSI-RS associated with the first CSI report configuration are associated with the at least one target frequency shift feedback, and the multiple CSI-RS are used to obtain the target MTRP CSI. Alternatively, the network side device may also indicate to the terminal at least one target delay feedback associated with the target MTRP CSI by configuring or establishing a second association relationship, wherein the second association relationship is that the second CSI report configuration is associated with the at least one target frequency shift feedback, and the second CSI report is used to obtain the target MTRP CSI.

[0219] S512: The network-side device receives the target MTRP CSI fed back by the terminal.

[0220] After receiving the instruction from the network side device, the terminal may obtain and feed back the target MTRP CSI according to the method described in the above method 200. For details, please refer to the relevant description in the above method 200, which will not be repeated here.

[0221] In an optional implementation, after the network-side device receives the target MTRP CSI fed back by the terminal, the method may further include:

[0222] Step 1: The network-side device obtains delay information between MTRPs based on the at least one target delay feedback and the delay information in the target MTRP CSI.

[0223] Since in actual applications, the network-side device may associate different target delay feedbacks with different target MTRP CSI indications, optionally, before step 1, the following step may be further included: the network-side device determines at least one target delay feedback associated with the target MTRP CSI. That is, the network-side device determines at least one target delay feedback associated with the target MTRP CSI fed back by the terminal.

[0224] Optionally, when obtaining the delay information between MTRPs, the network-side device may obtain the target PMI in the target MTRP CSI, and then determine, based on the at least one target delay feedback, that the target PMI satisfies one of the following:

[0225] 1) The target PMI does not include a delay indication between multiple reference signals;

[0226] 2) The target PMI includes delay indications of some reference signals among the multiple reference signals;

[0227] 3) The target PMI includes a delay indication associated with a first reference signal among the multiple reference signals, wherein the first reference signal is not associated with any delay feedback, and the first reference signal is a partial reference signal among the multiple reference signals;

[0228] 4) The target PMI includes a delay indication of a second reference signal among the multiple reference signals, wherein the time interval between the most recent delay feedback associated with the second reference signal and the first time is greater than a specific value, wherein the first time includes one of the following: the feedback time of the MTRP CSI, the time corresponding to the CSI reference resource associated with the MTRP CSI, and the CSI reference time slot associated with the MTRP CSI; the specific value is a value agreed upon by the protocol or indicated by the network, and the second reference signal is a partial reference signal among the multiple reference signals;

[0229] 5) The indication ranges associated with the delay indications of the respective reference signals in the multiple reference signals included in the target PMI are not completely the same;

[0230] 6) The target PMI does not include a delay indication of a third reference signal among the multiple reference signals, wherein the most recent delay feedback associated with the third reference signal is located after a second time, wherein the second time includes one of the following: the time corresponding to the CSI reference resource associated with the MTRP CSI, the CSI reference time slot associated with the MTRP CSI, and the third reference signal is a partial reference signal among the multiple reference signals.

[0231] In an optional implementation, the network-side device determining at least one target delay feedback associated with the target MTRP CSI may include: the network-side device determining that the at least one target delay feedback associated with the target MTRP CSI includes at least one of the following:

[0232] First delay feedback, the first delay feedback including: at least one most recent delay feedback before a third time;

[0233] Second delay feedback, the second delay feedback comprising: at least one delay feedback associated with a specific reference signal received most recently before a third time, the specific reference signal being a reference signal used to obtain at least one delay feedback;

[0234] The third time includes one of the following: a time corresponding to a CSI reference resource associated with the target MTRP CSI, or a CSI reference time slot associated with the target MTRP CSI.

[0235] The above optional implementation method can also be used for the network side device to obtain the frequency shift information between MTRPs based on the at least one target frequency shift feedback and the frequency shift information in the target MTRP CSI. That is, the terminal obtains the frequency shift information between MTRPs based on the at least one target frequency shift feedback and the frequency shift information in the target MTRP CSI, wherein the obtained frequency shift information between MTRPs can refer to the frequency shift or frequency shift offset fed back by the terminal in the at least one target frequency shift feedback; wherein the at least one target frequency shift feedback includes at least one of the following:

[0236] first frequency shift feedback, the first frequency shift feedback comprising: at least one most recent frequency shift feedback before a third time;

[0237] The second frequency shift feedback includes: at least one frequency shift feedback associated with a specific reference signal received most recently before a third time, where the specific reference signal is a reference signal used to obtain at least one frequency shift feedback.

[0238] The third time includes one of the following: a time corresponding to a CSI reference resource associated with the target MTRP CSI, or a CSI reference time slot associated with the target MTRP CSI. For example, the third time may be one of the following: a time corresponding to a CSI reference resource associated with the first CSI reporting configuration, or a CSI reference time slot associated with the first CSI reporting configuration, or a time corresponding to a CSI reference resource associated with the second CSI reporting configuration, or a CSI reference time slot associated with the second CSI reporting configuration.

[0239] In an optional implementation, before S512, the method may further include: the network-side device obtaining the delay information fed back by the terminal. The network-side device may determine the at least one target delay feedback based on the obtained delay information, and obtain the delay information between MTRPs based on the at least one target delay feedback and the delay information in the target MTRP CSI.

[0240] Optionally, before the network-side device obtains the delay information fed back by the terminal, the method may further include:

[0241] Step 1: The network device configures one of the following for the terminal:

[0242] at least one first reference signal set, the at least one first reference signal set being associated with a plurality of TRPs;

[0243] multiple first reference signal sets and a first indication, where the first indication is used to indicate a target reference signal set for obtaining delay information among the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs;

[0244] A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

[0245] The terminal may obtain and feed back delay information based on the configuration of the network-side device. For details, please refer to the relevant description in the above method 200.

[0246] The network side device may also use a similar method to configure the terminal with configuration information for obtaining and feeding back frequency shift information. For example, the network side device configures at least one first reference signal set to the terminal for obtaining frequency shift information.

[0247] In a case where the at least one first reference signal set includes multiple first reference signal sets, the multiple first reference signal sets satisfy at least one of the following:

[0248] The PCIs associated with the multiple first reference signal sets are not completely the same;

[0249] A plurality of first reference signal sets are sent in consecutive time slots.

[0250] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the method may further include: the network side device receives first capability information fed back by the terminal, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and the two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0251] Optionally, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0252] The PCIs associated with all the reference signals are not exactly the same;

[0253] The power control offsets associated with all the reference signals are not exactly the same.

[0254] Optionally, a reference signal in the first reference signal set is not allowed to be used as a Doppler-related quasi-co-site reference signal.

[0255] Optionally, a reference signal in the first reference signal set is not associated with a second reference signal set, where the reference signals in the second reference signal set are used to provide Doppler-related quasi-co-location information. In other words, a reference signal in the first reference signal set cannot be associated with other reference signal sets, where reference signals in other reference signal sets can be used to provide Doppler-related quasi-co-location information (average delay and / or delay spread).

[0256] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, the method may further include:

[0257] The network-side device receives second capability information fed back by the terminal, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports the transmission of multiple reference signals associated with the same time slot, whether the terminal supports the transmission of multiple reference signals associated with the same symbol, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and two reference signals with the farthest interval among the multiple reference signals.

[0258] Figure 6 shows another flow diagram of a method for acquiring channel state information in an embodiment of the present application. Method 600 can be executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. It should be noted that method 600 is an execution step of the network-side device corresponding to method 300. The following embodiments only describe the operation of the network-side device. For other matters not covered, please refer to the above description of method 300.

[0259] As shown in FIG6 , the method may include the following steps.

[0260] S610: The network-side device sends a target delay indication corresponding to a target CSI reporting configuration to the terminal, where the target delay indication is associated with at least one target delay adjustment value, and the target CSI reporting configuration is a CSI reporting configuration associated with a target MTRP CSI.

[0261] The terminal may determine at least one target delay adjustment value associated with the target MTRP CSI according to the target delay indication, and may then obtain the target MTRP CSI according to the target delay adjustment value. For details, please refer to the relevant description in the above method 300.

[0262] In an optional implementation, the network side device may send a first delay indication to the terminal, wherein the first delay indication is used to indicate a set of delay adjustment values ​​associated with the target CSI reporting configuration, wherein the target CSI reporting configuration is the CSI reporting configuration associated with the target MTRP CSI.

[0263] Optionally, before the network side device may send the first delay indication to the terminal, the network side device may configure multiple groups of delay adjustment values ​​for the terminal, wherein each group of target delay adjustment values ​​is associated with a CSI report configuration.

[0264] In another optional implementation, the network side device sends a second delay indication to the terminal, wherein the second delay indication is used to indicate at least one delay adjustment value associated with the target CSI reporting configuration, wherein the target CSI reporting configuration is the CSI reporting configuration associated with the target MTRP CSI.

[0265] Optionally, before the network side device sends the second delay indication to the terminal, the network side device may configure multiple delay adjustment values ​​for the terminal, wherein each delay adjustment value is associated with a CSI report configuration.

[0266] S612: The network-side device receives the target MTRP CSI fed back by the terminal.

[0267] Through the technical solution provided in the embodiment of the present application, the network side device sends a target delay indication to the terminal, so that the network side device can flexibly adjust the delay range or size associated with the delay information associated with the MTRP CSI fed back by the terminal, thereby improving the flexibility of the network side device.

[0268] The method of the embodiment of the present application can also be used to indicate a target frequency shift indication associated with a target MTRP CSI of a terminal, wherein the target frequency shift indication is associated with at least one target frequency shift value.

[0269] For example, the network side device indicates to the terminal through signaling (not limited to DCI or MAC CE or RRC signaling) multiple frequency shift values ​​that need to be considered or adjusted when calculating the current MTRP CSI. The terminal performs pre-compensation based on the multiple frequency shift values ​​when obtaining the MTRP CSI, and further obtains the MTRP CSI. The correspondence between the CSI-RS and the frequency shift can be based on the configuration order of the CSI-RS, that is, the first CSI-RS is associated with the first frequency shift value, the second CSI-RS is associated with the second frequency shift value, and so on. After obtaining the MTRP CSI fed back by the terminal, the network side device obtains the frequency shift information between multiple TRPs based on the multiple frequency shift values.

[0270] For example, the network device may pre-indicate multiple sets of frequency shift values ​​or multiple frequency shift values. The network device then selects or activates at least one set of frequency shift values ​​or at least one frequency shift value through signaling. Through this selection or activation process, the network device can flexibly control the frequency shift associated with the MTRP CSI.

[0271] In an optional implementation, after the network-side device receives the target MTRP CSI fed back by the terminal, the method may further include the following steps:

[0272] In step 1, the network device obtains the delay information between MTRPs based on the at least one target delay adjustment value and the delay information in the target MTRP CSI. For example, the delay information between MTRPs may be the sum of the target delay adjustment value and the delay information in the target MTRP CSI.

[0273] Since in actual applications, the network device may configure different target delay indicators for different target MTRP CSIs, optionally, before step 1, the following step may also be included: the network device determines at least one target delay adjustment value associated with the target MTRP CSI. That is, the network device determines at least one target delay adjustment value associated with the target MTRP CSI fed back by the terminal.

[0274] Figure 7 illustrates a flow chart of a method for acquiring latency information in an embodiment of the present application. Method 700 can be executed by a network-side device. In other words, the method can be executed by software or hardware installed on the network-side device. It should be noted that method 700 is the execution step of the network-side device corresponding to method 400. The following embodiments only describe the operation of the network-side device. For other matters not covered, please refer to the above description of method 300.

[0275] As shown in FIG7 , the method may include the following steps.

[0276] S710: The network-side device sends configuration information to the terminal.

[0277] The configuration information may include one of the following:

[0278] (1) at least one first reference signal set, wherein the at least one first reference signal set is associated with a plurality of TRPs;

[0279] (2) at least multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information among the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs;

[0280] (3) A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

[0281] S712: The network side device obtains the delay information between multiple TRPs fed back by the terminal.

[0282] After obtaining the above configuration information, the terminal can obtain and feedback the delay information between multiple TRPs based on the configuration information according to the above method 400.

[0283] The technical solution in the above embodiment can also be used to obtain frequency shift information between multiple TRPs. For example, the network side device configures any one of the above (1) to (3) for the terminal, and the terminal obtains and feeds back the frequency shift information to the network side device based on any one of the above (1) to (3), and the network side device obtains the frequency shift information fed back by the terminal.

[0284] Optionally, when the at least one first reference signal set includes multiple first reference signal sets, the multiple first reference signal sets satisfy at least one of the following:

[0285] The PCIs associated with the multiple first reference signal sets are not completely the same;

[0286] A plurality of first reference signal sets are sent in consecutive time slots.

[0287] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the method may further include:

[0288] The network-side device receives first capability information fed back by the terminal, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports the transmission of multiple reference signal sets associated with the same time slot, whether the terminal supports the transmission of multiple reference signal sets associated with the same symbol, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0289] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0290] The PCIs associated with all the reference signals are not exactly the same;

[0291] The power control offsets associated with all the reference signals are not exactly the same.

[0292] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, the method may further include:

[0293] The network-side device receives second capability information fed back by the terminal, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports the transmission of multiple reference signals associated with the same time slot, whether the terminal supports the transmission of multiple reference signals associated with the same symbol, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and two reference signals with the farthest interval among the multiple reference signals.

[0294] Through the above technical solution provided by the embodiment of the present application, the network side device can configure the configuration information of the terminal for delay feedback, so that the terminal can obtain and feedback the delay information.

[0295] The channel state information feedback method provided in the embodiment of the present application can be executed by a channel state information feedback device. In the embodiment of the present application, the channel state information feedback method performed by the channel state information feedback device is used as an example to illustrate the channel state information feedback device provided in the embodiment of the present application.

[0296] FIG8 shows a schematic structural diagram of a channel state information feedback device in an embodiment of the present application. As shown in FIG8 , the device 800 mainly includes: a first determination module 801 and a first feedback module 802 .

[0297] In this embodiment of the present application, the first determination module 801 is configured to determine at least one target delay feedback associated with the target MTRP CSI to be obtained; and the first feedback module 802 is configured to obtain and feed back the target MTRP CSI based on the at least one target delay feedback.

[0298] In an optional implementation, determining the at least one target delay feedback associated with the target MTRP CSI to be obtained includes at least one of the following:

[0299] When a first CSI reporting configuration is associated with multiple CSI reference signals CSI-RSs, the multiple CSI-RSs are used to obtain the target MTRP CSI, and a first association relationship exists between the multiple CSI-RSs and the at least one target delay feedback, determining that the target MTRP CSI is associated with the at least one target delay feedback;

[0300] When the second CSI reporting configuration is used to obtain the target MTRP CSI and a second association relationship exists between the second CSI reporting configuration and the at least one target delay feedback, it is determined that the target MTRP CSI is associated with the at least one target delay feedback.

[0301] In an optional implementation, the first association relationship includes one of the following:

[0302] The CSI-RS sets associated with the multiple CSI-RSs are associated with a first tracking reference signal TRS set, and the first TRS set is associated once with the target delay feedback;

[0303] The CSI-RS sets associated with the multiple CSI-RSs are associated with multiple second TRS sets, and the multiple second TRS sets are associated with the at least one target delay feedback;

[0304] The CSI-RS set associated with the multiple CSI-RSs is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback;

[0305] Each of the multiple CSI-RSs is associated with a TRS or a TRS set, and the multiple TRSs or multiple TRS sets associated with the multiple CSI-RSs are associated with the at least one target delay feedback;

[0306] Each of the multiple CSI-RSs is associated with a physical cell identifier (PCI), and the multiple PCIs associated with the multiple CSI-RSs are associated with the at least one target delay feedback.

[0307] In an optional implementation, the second association relationship includes one of the following:

[0308] The second CSI reporting configuration is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback;

[0309] The second CSI reporting configuration is associated with at least one PCI, and the at least one PCI is associated with the at least one target delay feedback.

[0310] In an optional implementation, obtaining the target MTRP CSI based on the at least one target delay feedback includes:

[0311] A target precoding matrix indication PMI in the target MTRP CSI obtained based on the at least one target delay feedback, wherein the target PMI satisfies one of the following:

[0312] The target PMI does not include a delay indication between multiple reference signals;

[0313] The target PMI includes delay indications of some reference signals among the multiple reference signals;

[0314] The target PMI includes a delay indication associated with a first reference signal among the multiple reference signals, wherein the first reference signal is not associated with any delay feedback, and the first reference signal is a partial reference signal among the multiple reference signals;

[0315] The target PMI includes a delay indication of a second reference signal among the multiple reference signals, wherein the time interval between the most recent delay feedback associated with the second reference signal and the first time is greater than a specific value, wherein the first time includes one of the following: the feedback time of the MTRP CSI, the time corresponding to the CSI reference resource associated with the MTRP CSI, and the CSI reference time slot associated with the MTRP CSI. The specific value is a value agreed upon by the protocol, a value indicated by the network, or a value fed back by the terminal. The second reference signal is a partial reference signal among the multiple reference signals;

[0316] The indication ranges associated with the delay indications of the respective reference signals in the multiple reference signals included in the target PMI are not completely the same;

[0317] The target PMI does not include a delay indication of a third reference signal among the multiple reference signals, wherein the most recent delay feedback associated with the third reference signal is located after a second time, wherein the second time includes one of the following: a time corresponding to a CSI reference resource associated with the MTRP CSI, or a CSI reference time slot associated with the MTRP CSI, and the third reference signal is a partial reference signal among the multiple reference signals.

[0318] In an optional implementation, obtaining the target MTRP CSI based on the at least one target delay feedback includes:

[0319] The target MTRP CSI is obtained based on the at least one target delay feedback, wherein the obtained target MTRP CSI does not include or is not associated with the delay fed back by the terminal in the at least one target delay feedback; wherein the at least one target delay feedback includes at least one of the following:

[0320] First delay feedback, the first delay feedback including: at least one most recent delay feedback before a third time;

[0321] Second delay feedback, the second delay feedback comprising: at least one delay feedback associated with a specific reference signal received most recently before a third time, the specific reference signal being a reference signal used to obtain at least one delay feedback;

[0322] The third time includes one of the following: a time corresponding to a CSI reference resource associated with the target MTRP CSI, or a CSI reference time slot associated with the target MTRP CSI.

[0323] In an optional implementation, the first feedback module 802 is further configured to:

[0324] Acquire and feed back delay information based on at least one first reference signal set configured by the network-side device;

[0325] Acquire and feed back delay information based on multiple first reference signal sets and a first indication configured by a network-side device, wherein the first indication is used to indicate a target reference signal set for acquiring delay information in the at least one first reference signal set;

[0326] Based on a first reference signal set and a second indication configured by a network-side device, delay information is obtained and fed back, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information.

[0327] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the multiple first reference signal sets satisfy at least one of the following:

[0328] The PCIs associated with the multiple first reference signal sets are not completely the same;

[0329] A plurality of first reference signal sets are sent in consecutive time slots.

[0330] In an optional implementation, the first feedback module 802 is further configured to:

[0331] Feedback first capability information to the network side device, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and the two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0332] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0333] The PCIs associated with all the reference signals are not exactly the same;

[0334] The power control offsets associated with all the reference signals are not exactly the same.

[0335] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, a reference signal in the one first reference signal set is allowed to be used as a delay-dependent quasi-co-site reference signal.

[0336] In an optional implementation, a reference signal in the first reference signal set is not associated with a second reference signal set, wherein the reference signals in the second reference signal set are used to provide Doppler-related quasi co-location information.

[0337] In an optional implementation, the first feedback module 802 is also used to: feedback second capability information to the network side device, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signals associated with the same time slot transmission, whether the terminal supports multiple reference signals associated with the same symbol transmission, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and the two reference signals with the farthest interval among the multiple reference signals.

[0338] FIG9 shows another structural diagram of a channel state information feedback device in an embodiment of the present application. As shown in FIG9 , the device 900 mainly includes: a second determination module 901 and a second feedback module 902 .

[0339] In this embodiment of the present application, the second determination module 901 is configured to determine a target delay indication associated with a target MTRP CSI to be acquired, wherein the target delay indication is associated with at least one target delay adjustment value; and the second feedback module 902 is configured to acquire and feed back the target MTRP CSI based on the target delay indication.

[0340] In an optional implementation, determining the target latency indication associated with the target MTRP CSI to be acquired includes at least one of the following:

[0341] Obtaining a first delay indication, where the first delay indication is used to indicate a set of delay adjustment values ​​associated with a target CSI reporting configuration, where the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI;

[0342] Obtaining a second delay indication, where the second delay indication is used to indicate at least one delay adjustment value associated with a target CSI reporting configuration, where the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI;

[0343] The target delay indication includes at least one of the following: the first delay indication and the second delay indication.

[0344] In an optional implementation, the second determining module 901 is further configured to perform at least one of the following:

[0345] Acquire multiple groups of delay adjustment values, wherein each group of target delay adjustment values ​​is associated with a CSI reporting configuration;

[0346] Acquire multiple delay adjustment values, where each delay adjustment value is associated with a CSI report configuration.

[0347] In an optional implementation, obtaining the target MTRP CSI based on the target delay indication includes:

[0348] The target MTRP CSI is obtained based on the target delay indication, wherein the delay value in the obtained target MTRP CSI is a difference between a target delay associated with at least one reference signal and the at least one target delay adjustment value.

[0349] FIG10 shows another schematic structural diagram of a delay information feedback device in an embodiment of the present application. As shown in FIG10 , the device 1000 mainly includes: a first acquisition module 1001 and a third feedback module 1002 .

[0350] In an embodiment of the present application, a first acquisition module 1001 is used to obtain delay information between multiple TRPs based on the configuration of a network-side device; a third feedback module 1002 is used to feedback the obtained delay information between the multiple TRPs; wherein the configuration of the network-side device includes one of the following: at least one first reference signal set, the at least one first reference signal set is associated with multiple TRPs; multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs; one first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal for obtaining delay information in the first reference signal set, and the first reference signal set is associated with multiple TRPs.

[0351] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the multiple first reference signal sets satisfy at least one of the following:

[0352] The PCIs associated with the multiple first reference signal sets are not completely the same;

[0353] A plurality of first reference signal sets are sent in consecutive time slots.

[0354] In an optional implementation, the third feedback module 1002 is also used to: feedback first capability information to the network side device, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and the two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0355] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0356] The PCIs associated with all the reference signals are not exactly the same;

[0357] The power control offsets associated with all the reference signals are not exactly the same.

[0358] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, a reference signal in the one first reference signal set is allowed to be used as a delay-dependent quasi-co-site reference signal.

[0359] In an optional implementation, a reference signal in the first reference signal set is not associated with a second reference signal set, wherein the reference signals in the second reference signal set are used to provide Doppler-related quasi co-location information.

[0360] In an optional implementation, the third feedback module 1002 is also used for: the terminal to feed back second capability information to the network side device, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signals associated with the same time slot transmission, whether the terminal supports multiple reference signals associated with the same symbol transmission, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and the two reference signals with the farthest interval among the multiple reference signals.

[0361] The above-mentioned device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal, or it can be other devices other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0362] Figure 11 shows a structural schematic diagram of a device for acquiring channel state information in an embodiment of the present application. As shown in Figure 11, the device 1100 mainly includes: a first indication module 1101, which is used to indicate at least one target delay feedback associated with the target MTRP CSI to the terminal; and a first transceiver module 1102, which is used to receive the target MTRP CSI fed back by the terminal.

[0363] In an optional implementation, the method further includes a third determining module configured to:

[0364] Determining at least one target delay feedback associated with the target MTRP CSI;

[0365] Delay information between MTRPs is acquired based on the at least one target delay feedback and the delay information in the target MTRP CSI.

[0366] In an optional implementation, indicating at least one target delay feedback associated with the target MTRP CSI to the terminal includes at least one of the following:

[0367] Indicating at least one target delay feedback associated with the target MTRP CSI to the terminal by configuring or establishing a first association relationship, wherein the first association relationship is associating multiple CSI reference signals (CSI-RSs) associated with a first CSI report configuration with the at least one target delay feedback, and the multiple CSI-RSs are used to obtain the target MTRP CSI;

[0368] The at least one target delay feedback associated with the target MTRP CSI is indicated to the terminal by configuring or establishing a second association relationship, wherein the second association relationship is an association between a second CSI report configuration and the at least one target delay feedback, and the second CSI report is used to obtain the target MTRP CSI.

[0369] In an optional implementation, the first association relationship includes one of the following:

[0370] The CSI-RS sets associated with the multiple CSI-RSs are associated with a first tracking reference signal TRS set, and the first TRS set is associated once with the target delay feedback;

[0371] The CSI-RS sets associated with the multiple CSI-RSs are associated with multiple second TRS sets, and the multiple second TRS sets are associated with the at least one target delay feedback;

[0372] The CSI-RS set associated with the multiple CSI-RSs is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback;

[0373] Each of the multiple CSI-RSs is associated with a TRS or a TRS set, and the multiple TRSs or multiple TRS sets associated with the multiple CSI-RSs are associated with the at least one target delay feedback;

[0374] Each of the multiple CSI-RSs is associated with a physical cell identifier (PCI), and the multiple PCIs associated with the multiple CSI-RSs are associated with the at least one target delay feedback.

[0375] In an optional implementation, the second association relationship includes one of the following:

[0376] The second CSI reporting configuration is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback;

[0377] The second CSI reporting configuration is associated with at least one PCI, and the at least one PCI is associated with the at least one target delay feedback.

[0378] In an optional implementation, obtaining the delay information between MTRPs based on the at least one target delay feedback and the delay information in the target MTRP CSI includes:

[0379] Obtaining a target PMI in the target MTRP CSI;

[0380] Determine, based on the at least one target delay feedback, that the target PMI satisfies one of the following:

[0381] The target PMI does not include a delay indication between multiple reference signals;

[0382] The target PMI includes delay indications of some reference signals among the multiple reference signals.

[0383] The target PMI includes a delay indication associated with a first reference signal among the multiple reference signals, wherein the first reference signal is not associated with any delay feedback, and the first reference signal is a partial reference signal among the multiple reference signals;

[0384] The target PMI includes a delay indication of a second reference signal among the multiple reference signals, wherein the time interval between the most recent delay feedback associated with the second reference signal and the first time is greater than a specific value, wherein the first time includes one of the following: the feedback time of the MTRP CSI, the time corresponding to the CSI reference resource associated with the MTRP CSI, and the CSI reference time slot associated with the MTRP CSI, the specific value is a value agreed upon by the protocol or indicated by the network, and the second reference signal is a partial reference signal among the multiple reference signals;

[0385] The indication ranges associated with the delay indications of the respective reference signals in the multiple reference signals included in the target PMI are not completely the same;

[0386] The target PMI does not include a delay indication of a third reference signal among the multiple reference signals, wherein the most recent delay feedback associated with the third reference signal is located after a second time, wherein the second time includes one of the following: a time corresponding to a CSI reference resource associated with the MTRP CSI, or a CSI reference time slot associated with the MTRP CSI, and the third reference signal is a partial reference signal among the multiple reference signals.

[0387] In an optional implementation, determining at least one target delay feedback associated with the target MTRP CSI includes:

[0388] Determining the at least one target delay feedback associated with the target MTRP CSI includes at least one of the following:

[0389] First delay feedback, the first delay feedback including: at least one most recent delay feedback before a third time;

[0390] Second delay feedback, the second delay feedback comprising: at least one delay feedback associated with a specific reference signal received most recently before a third time, the specific reference signal being a reference signal used to obtain at least one delay feedback;

[0391] The third time includes one of the following: a time corresponding to a CSI reference resource associated with the target MTRP CSI, or a CSI reference time slot associated with the target MTRP CSI.

[0392] In an optional implementation, the transceiver module is further configured to obtain delay information fed back by the terminal.

[0393] In an optional implementation, the first indication module is further configured to configure one of the following for the terminal:

[0394] at least one first reference signal set, the at least one first reference signal set being associated with a plurality of TRPs;

[0395] multiple first reference signal sets and a first indication, where the first indication is used to indicate a target reference signal set for obtaining delay information among the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs;

[0396] A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

[0397] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the multiple first reference signal sets satisfy at least one of the following:

[0398] The PCIs associated with the multiple first reference signal sets are not completely the same;

[0399] A plurality of first reference signal sets are sent in consecutive time slots.

[0400] In an optional implementation, the first transceiver module 1102 is also used to: receive first capability information fed back by the terminal, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and the two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0401] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0402] The PCIs associated with all the reference signals are not exactly the same;

[0403] The power control offsets associated with all the reference signals are not exactly the same.

[0404] In an optional implementation, the first transceiver module 1102 is also used to receive second capability information fed back by the terminal, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signals associated with the same time slot transmission, whether the terminal supports multiple reference signals associated with the same symbol transmission, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and the two reference signals with the farthest intervals among the multiple reference signals.

[0405] Figure 12 shows another structural schematic diagram of the channel state information acquisition device in an embodiment of the present application. The device 1200 mainly includes: a second indication module 1201, which is used to send a target delay indication corresponding to the target CSI reporting configuration to the terminal, wherein the target delay indication is associated with at least one target delay adjustment value, and the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI; and a second transceiver module 1202, which is used to receive the target MTRP CSI fed back by the terminal.

[0406] In an optional implementation, the method further includes a fourth determining module configured to:

[0407] determining at least one target delay adjustment value associated with the target MTRP CSI;

[0408] Delay information between MTRPs is acquired based on the at least one target delay adjustment value and the delay information in the target MTRP CSI.

[0409] In an optional implementation, sending a target latency indication corresponding to the target CSI reporting configuration to the terminal includes at least one of the following:

[0410] Sending a first delay indication to the terminal, wherein the first delay indication is used to indicate a set of delay adjustment values ​​associated with a target CSI reporting configuration, wherein the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI;

[0411] Sending a second delay indication to the terminal, wherein the second delay indication is used to indicate at least one delay adjustment value associated with a target CSI reporting configuration, wherein the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI;

[0412] The target delay indication includes at least one of the following: the first delay indication and the second delay indication.

[0413] In an optional implementation, the second indication module 1201 is further configured to:

[0414] configuring a plurality of groups of delay adjustment values ​​for the terminal, wherein each group of target delay adjustment values ​​is associated with a CSI reporting configuration;

[0415] A plurality of delay adjustment values ​​are configured for the terminal, wherein each of the delay adjustment values ​​is associated with a CSI report configuration.

[0416] Figure 13 shows a structural schematic diagram of a device for obtaining delay information in an embodiment of the present application, and the device 1300 mainly includes: a third transceiver module 1301 for sending configuration information to a terminal; a second acquisition module 1302, for obtaining delay information between multiple TRPs fed back by the terminal; wherein the configuration information includes one of the following: at least one first reference signal set, and the at least one first reference signal set is associated with multiple TRPs; multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs; a first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal for obtaining delay information in the first reference signal set, and the first reference signal set is associated with multiple TRPs.

[0417] In an optional implementation, when the at least one first reference signal set includes multiple first reference signal sets, the multiple first reference signal sets satisfy at least one of the following:

[0418] The PCIs associated with the multiple first reference signal sets are not completely the same;

[0419] A plurality of first reference signal sets are sent in consecutive time slots.

[0420] In an optional implementation, the third transceiver module 1301 is also used to receive first capability information fed back by the terminal, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and the two reference signal sets with the farthest intervals in the multiple reference signal sets.

[0421] In an optional implementation, when the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following:

[0422] The PCIs associated with all the reference signals are not exactly the same;

[0423] The power control offsets associated with all the reference signals are not exactly the same.

[0424] In an optional implementation, the third transceiver module 1301 is also used to receive second capability information fed back by the terminal, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signals associated with the same time slot for transmission, whether the terminal supports multiple reference signals associated with the same symbol for transmission, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals in the multiple reference signals, the second symbol interval is the symbol interval between two reference signals in the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals in the multiple reference signals, and the two reference signals with the farthest intervals among the multiple reference signals.

[0425] The above-mentioned device provided in the embodiment of the present application can implement each process implemented in the method embodiments of Figures 2 to 7 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0426] As shown in Figure 14, an embodiment of the present application further provides a communication device 1400, including a processor 1401 and a memory 1402. The memory 1402 stores a program or instruction that can be run on the processor 1401. For example, when the communication device 1400 is a terminal, the program or instruction, when executed by the processor 1401, implements the various steps of the above-mentioned method 200, 300, or 400 embodiments, and can achieve the same technical effects. When the communication device 1400 is a network-side device, the program or instruction, when executed by the processor 1401, implements the various steps of the above-mentioned method 500, 600, or 700 embodiments, and can achieve the same technical effects. To avoid repetition, they are not repeated here.

[0427] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiments shown in Figures 2 to 4. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 15 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0428] The terminal 1500 includes but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509 and at least some of the components of the processor 1510.

[0429] Those skilled in the art will appreciate that the terminal 1500 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 1510 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG15 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0430] It should be understood that in an embodiment of the present application, the input unit 1504 may include a graphics processing unit (GPU) 15041 and a microphone 15042, and the graphics processing unit 15041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1506 may include a display panel 15061, and the display panel 15061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1507 includes a touch panel 15071 and at least one of other input devices 15072. The touch panel 15071 is also called a touch screen. The touch panel 15071 may include two parts: a touch detection device and a touch controller. Other input devices 15072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0431] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 1501 may transmit the data to the processor 1510 for processing. Furthermore, the radio frequency unit 1501 may send uplink data to the network-side device. Typically, the radio frequency unit 1501 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0432] Memory 1509 can be used to store software programs or instructions and various data. Memory 1509 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). Furthermore, memory 1509 may include volatile memory or non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 1509 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0433] Processor 1510 may include one or more processing units. Optionally, processor 1510 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1510.

[0434] The processor 1510 is configured to:

[0435] Determining at least one target delay feedback associated with a target multi-transmission reception point (multi-TRP, MTRP) CSI to be acquired; acquiring and feeding back the target MTRP CSI based on the at least one target delay feedback; or,

[0436] Determining a target delay indication associated with a target MTRP CSI to be acquired, wherein the target delay indication is associated with at least one target delay adjustment value; acquiring and feeding back the target MTRP CSI based on the target delay indication; or

[0437] Based on the configuration of the network-side device, delay information between multiple TRPs is obtained; and the delay information between the multiple TRPs obtained is fed back; wherein the configuration of the network-side device includes one of the following: at least one first reference signal set, and the at least one first reference signal set is associated with multiple TRPs; multiple first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the multiple first reference signal sets, and the multiple first reference signal sets are associated with multiple TRPs; one first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal for obtaining delay information in the first reference signal set, and the first reference signal set is associated with multiple TRPs.

[0438] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of method embodiments 200 to 400, and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0439] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiments shown in Figures 5 to 7. This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this network-side device embodiment and can achieve the same technical effects.

[0440] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 16, network-side device 1600 includes an antenna 1601, a radio frequency device 1602, a baseband device 1603, a processor 1604, and a memory 1605. Antenna 1601 is connected to radio frequency device 1602. In the uplink direction, radio frequency device 1602 receives information via antenna 1601 and sends the received information to baseband device 1603 for processing. In the downlink direction, baseband device 1603 processes the information to be transmitted and sends it to radio frequency device 1602. Radio frequency device 1602 processes the received information and then sends it through antenna 1601.

[0441] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1603 , which includes a baseband processor.

[0442] The baseband device 1603 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 16, one of which is, for example, a baseband processor, which is connected to the memory 1605 through a bus interface to call the program in the memory 1605 and execute the network device operations shown in the above method embodiment.

[0443] The network side device may further include a network interface 1606, which is, for example, a Common Public Radio Interface (CPRI).

[0444] Specifically, the network side device 1600 of the embodiment of the present application also includes: instructions or programs stored in the memory 1605 and executable on the processor 1604. The processor 1604 calls the instructions or programs in the memory 1605 to execute the methods executed by the modules shown in Figures 11 to 13 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0445] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the method embodiments of Figures 2 to 7 above are implemented, and the same technical effects can be achieved. To avoid repetition, they will not be repeated here.

[0446] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0447] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the method embodiments of Figures 2 to 7 above, and can achieve the same technical effects. To avoid repetition, they will not be repeated here.

[0448] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0449] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the method embodiments of Figures 2 to 7 above, and can achieve the same technical effects. To avoid repetition, they are not described here.

[0450] An embodiment of the present application further provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute steps 200 to 400 of the above-described method, and the network-side device can be used to execute steps 500 to 700 of the above-described method.

[0451] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0452] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0453] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for feeding back channel state information, comprising: The terminal determines at least one target delay feedback associated with the target multi-transmission reception point MTRP channel state information CSI to be acquired; The terminal acquires and feeds back the target MTRP CSI based on the at least one target delay feedback.

2. The method according to claim 1, wherein: The terminal determines the at least one target delay feedback associated with the target MTRP CSI to be acquired, including at least one of the following: When a first CSI report configuration is associated with multiple CSI reference signals CSI-RS, the multiple CSI-RS are used to obtain the target MTRP CSI, and there is a first association relationship between the multiple CSI-RS and the at least one target delay feedback, determining that the target MTRP CSI is associated with the at least one target delay feedback; When the second CSI reporting configuration is used to obtain the target MTRP CSI and a second association relationship exists between the second CSI reporting configuration and the at least one target delay feedback, it is determined that the target MTRP CSI is associated with the at least one target delay feedback.

3. The method according to claim 2, wherein: The first association relationship includes one of the following: The CSI-RS sets associated with the multiple CSI-RSs are associated with a first tracking reference signal TRS set, and the first TRS set is associated with the target delay feedback once; The CSI-RS sets associated with the multiple CSI-RSs are associated with multiple second TRS sets, and the multiple second TRS sets are associated with the at least one target delay feedback; The CSI-RS set associated with the multiple CSI-RSs is associated with at least one CSI report configuration, and the at least one CSI report configuration is associated with the at least one target delay feedback; Each of the multiple CSI-RSs is associated with a TRS or a TRS set, and the multiple TRSs or multiple TRS sets associated with the multiple CSI-RSs are associated with the at least one target delay feedback; Each of the multiple CSI-RSs is associated with a physical cell identifier PCI, and multiple PCIs associated with the multiple CSI-RSs are associated with the at least one target delay feedback.

4. The method according to claim 2, wherein: The second association relationship includes one of the following: The second CSI reporting configuration is associated with at least one CSI reporting configuration, and the at least one CSI reporting configuration is associated with the at least one target delay feedback; The second CSI reporting configuration is associated with at least one PCI, and the at least one PCI is associated with the at least one target delay feedback.

5. The method according to any one of claims 1 to 4, wherein: The terminal acquires the target MTRP CSI based on the at least one target delay feedback, including: The terminal obtains a target precoding matrix indication PMI in the target MTRP CSI based on the at least one target delay feedback, wherein the target PMI satisfies one of the following: The target PMI does not include a delay indication between multiple reference signals; The target PMI includes delay indications of some reference signals among the multiple reference signals; The target PMI includes a delay indication associated with a first reference signal among the multiple reference signals, wherein the first reference signal is not associated with any delay feedback, and the first reference signal is a partial reference signal among the multiple reference signals; The target PMI includes a delay indication of a second reference signal among the multiple reference signals, wherein the time interval from the most recent delay feedback associated with the second reference signal to the first time is greater than a specific value, wherein the first time includes one of the following: the feedback time of the MTRP CSI, the CSI reference resource associated with the MTRP CSI The corresponding time, the CSI reference time slot associated with the MTRP CSI, the specific value is a value agreed upon by the protocol or a value indicated by the network or a value fed back by the terminal, and the second reference signal is a part of the multiple reference signals; The indication ranges associated with the delay indications of the respective reference signals in the multiple reference signals included in the target PMI are not completely the same; The target PMI does not include a delay indication of a third reference signal among the multiple reference signals, wherein the most recent delay feedback associated with the third reference signal is located after a second time, wherein the second time includes one of the following: a time corresponding to a CSI reference resource associated with the MTRP CSI, a CSI reference time slot associated with the MTRP CSI, and the third reference signal is a partial reference signal among the multiple reference signals.

6. The method according to any one of claims 2 to 5, wherein: The terminal acquires the target MTRP CSI based on the at least one target delay feedback, including: The terminal acquires the target MTRP CSI based on the at least one target delay feedback, wherein the acquired target MTRP CSI does not include or is not associated with the delay fed back by the terminal in the at least one target delay feedback; wherein the at least one target delay feedback includes at least one of the following: First delay feedback, the first delay feedback includes: at least one most recent delay feedback before a third time; second delay feedback, the second delay feedback comprising: at least one delay feedback associated with a specific reference signal received most recently before a third time, the specific reference signal being a reference signal used to obtain at least one delay feedback; The third time includes one of the following: the time corresponding to the CSI reference resource associated with the target MTRP CSI, and the CSI reference time slot associated with the target MTRP CSI.

7. The method according to any one of claims 1 to 6, wherein: Before the terminal determines the at least one target delay feedback associated with the target MTRP CSI to be acquired, the method further includes one of the following: The terminal acquires and feeds back delay information based on at least one first reference signal set configured by the network side device; The terminal acquires and feeds back delay information based on multiple first reference signal sets and a first indication configured by a network side device, wherein the first indication is used to indicate a target reference signal set for acquiring delay information in the at least one first reference signal set; The terminal obtains and feeds back delay information based on a first reference signal set and a second indication configured by a network side device, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information.

8. The method according to claim 7, wherein: In the case where the at least one first reference signal set includes a plurality of first reference signal sets, the plurality of first reference signal sets satisfy at least one of the following: The PCIs associated with the multiple first reference signal sets are not completely the same; A plurality of the first reference signal sets are sent in consecutive time slots.

9. The method according to claim 7, wherein: In a case where the at least one first reference signal set includes a plurality of first reference signal sets, the method further includes: The terminal feeds back first capability information to the network side device, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signal sets associated with the same time slot transmission, whether the terminal supports multiple reference signal sets associated with the same symbol transmission, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, The two reference signal sets that are farthest apart from each other among the multiple reference signal sets.

10. The method according to claim 7, wherein: In the case where the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following: The PCIs associated with all the reference signals are not completely the same; The power control offsets associated with all the reference signals are not exactly the same.

11. The method according to claim 7, wherein: In the case that the at least one first reference signal set includes one first reference signal set, reference signals in one first reference signal set are allowed to serve as delay-dependent quasi-co-located reference signals.

12. The method according to claim 11, wherein: A reference signal in the first reference signal set is not associated with a second reference signal set, wherein the reference signals in the second reference signal set are used to provide Doppler-related quasi co-location information.

13. The method according to claim 7, wherein: In the case where the at least one first reference signal set includes one first reference signal set, the method further includes: The terminal feeds back second capability information to the network side device, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports sending multiple reference signals associated with the same time slot, whether the terminal supports sending multiple reference signals associated with the same symbol, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals among the multiple reference signals, the second symbol interval is the symbol interval between two reference signals among the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals among the multiple reference signals, and two reference signals with the farthest interval among the multiple reference signals.

14. A method for feeding back channel state information, comprising: The terminal determines a target delay indication associated with a target MTRP CSI to be acquired, wherein the target delay indication is associated with at least one target delay adjustment value; The terminal acquires and feeds back the target MTRP CSI based on the target delay indication.

15. The method according to claim 14, wherein: The terminal determines a target delay indication associated with the target MTRP CSI to be acquired, including at least one of the following: The terminal obtains a first delay indication, wherein the first delay indication is used to indicate a set of delay adjustment values ​​associated with a target CSI reporting configuration, wherein the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI; The terminal obtains a second delay indication, wherein the second delay indication is used to indicate at least one delay adjustment value associated with a target CSI reporting configuration, and the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI; The target delay indication includes at least one of the following: the first delay indication and the second delay indication.

16. The method according to claim 15, wherein: Before the terminal determines the target delay indication associated with the target MTRP CSI to be acquired, the method further includes at least one of the following: The terminal obtains multiple groups of delay adjustment values, wherein each group of target delay adjustment values ​​is associated with a CSI report configuration; The terminal obtains multiple delay adjustment values, wherein each of the delay adjustment values ​​is associated with a CSI report configuration.

17. The method according to any one of claims 14 to 16, wherein: The terminal acquires the target MTRP CSI based on the target delay indication, including: The terminal acquires the target MTRP CSI based on the target delay indication, wherein the delay value in the acquired target MTRP CSI is a difference between a target delay associated with at least one reference signal and the at least one target delay adjustment value.

18. A method for feedback of delay information, comprising: The terminal obtains and feeds back the delay information between multiple TRPs based on the configuration of the network-side device; The configuration of the network side device includes one of the following: at least one first reference signal set, the at least one first reference signal set being associated with a plurality of TRPs; A plurality of first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the plurality of first reference signal sets, and the plurality of first reference signal sets are associated with a plurality of TRPs; A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

19. The method according to claim 18, wherein: In the case where the at least one first reference signal set includes a plurality of first reference signal sets, the plurality of first reference signal sets satisfy at least one of the following: The PCIs associated with the multiple first reference signal sets are not completely the same; A plurality of the first reference signal sets are sent in consecutive time slots.

20. The method according to claim 18, wherein: In a case where the at least one first reference signal set includes a plurality of first reference signal sets, the method further includes: The terminal feeds back first capability information to the network side device, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports sending multiple reference signal sets associated with the same time slot, whether the terminal supports sending multiple reference signal sets associated with the same symbol, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and two reference signal sets with the farthest intervals in the multiple reference signal sets.

21. The method according to claim 18, wherein: In the case where the at least one first reference signal set includes one first reference signal set, all reference signals in the one first reference signal set satisfy at least one of the following: The PCIs associated with all the reference signals are not completely the same; The power control offsets associated with all the reference signals are not exactly the same.

22. The method according to claim 21, wherein: In the case that the at least one first reference signal set includes one first reference signal set, reference signals in one first reference signal set are allowed to serve as delay-dependent quasi-co-located reference signals.

23. The method according to claim 22, wherein: A reference signal in the first reference signal set is not associated with a second reference signal set, wherein the reference signals in the second reference signal set are used to provide Doppler-related quasi co-location information.

24. The method according to claim 21, wherein: In the case where the at least one first reference signal set includes one first reference signal set, the method further includes: The terminal feeds back second capability information to the network side device, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports multiple reference signals associated with the same time slot for transmission, whether the terminal supports multiple reference signals associated with the same symbol for transmission, a second time slot interval supported by the terminal, and a second symbol interval supported by the terminal. The second time slot interval is a time slot interval between two reference signals in a plurality of reference signals, the second symbol interval is a symbol interval between two reference signals in a plurality of reference signals, and the two reference signals include one of the following: two adjacent reference signals in the plurality of reference signals, and two reference signals with the farthest interval in the plurality of reference signals.

25. A method for acquiring channel state information, comprising: The network side device indicates to the terminal at least one target delay feedback associated with the target MTRP CSI; The network side device receives the target MTRP CSI fed back by the terminal.

26. The method according to claim 25, wherein: After the network side device receives the target MTRP CSI fed back by the terminal, the method further includes: The network side device obtains the delay information between MTRPs based on the at least one target delay feedback and the delay information in the target MTRP CSI.

27. The method according to claim 25 or 26, wherein: The network side device indicates to the terminal at least one target delay feedback associated with the target MTRP CSI, including at least one of the following: The network side device indicates to the terminal at least one target delay feedback associated with the target MTRP CSI by configuring or establishing a first association relationship, wherein the first association relationship is that multiple CSI reference signals CSI-RS associated with the first CSI report configuration are associated with the at least one target delay feedback, and the multiple CSI-RSs are used to obtain the target MTRP CSI; The network side device indicates to the terminal at least one target delay feedback associated with the target MTRP CSI by configuring or establishing a second association relationship, wherein the second association relationship is that the second CSI report configuration is associated with the at least one target delay feedback, and the second CSI report is used to obtain the target MTRP CSI.

28. The method according to claim 26, wherein: The network side device acquires delay information between MTRPs based on the at least one target delay feedback and the delay information in the target MTRP CSI, including: The network side device obtains the target PMI in the target MTRP CSI; The network-side device determines, based on the at least one target delay feedback, that the target PMI satisfies one of the following: The target PMI does not include a delay indication between multiple reference signals; The target PMI includes delay indications of some reference signals among the multiple reference signals; The target PMI includes a delay indication associated with a first reference signal among the multiple reference signals, wherein the first reference signal is not associated with any delay feedback, and the first reference signal is a partial reference signal among the multiple reference signals; The target PMI includes a delay indication of a second reference signal among the multiple reference signals, wherein the time interval from the most recent delay associated with the second reference signal to the first time is greater than a specific value, wherein the first time includes one of the following: the feedback time of the MTRP CSI, the time corresponding to the CSI reference resource associated with the MTRP CSI, and the CSI reference time slot associated with the MTRP CSI, the specific value is a value agreed upon by the protocol or indicated by the network, and the second reference signal is a partial reference signal among the multiple reference signals; The indication ranges associated with the delay indications of the respective reference signals in the multiple reference signals included in the target PMI are not completely the same; The target PMI does not include a delay indication of a third reference signal among the multiple reference signals, wherein the most recent delay feedback associated with the third reference signal is located after a second time, wherein the second time includes one of the following: a time corresponding to a CSI reference resource associated with the MTRP CSI, a CSI reference time slot associated with the MTRP CSI, and the third reference signal is a partial reference signal among the multiple reference signals.

29. The method according to claim 26, wherein: The network side device determines at least one target delay feedback associated with the target MTRP CSI, including: The at least one target delay feedback associated with the target MTRP CSI determined by the network side device includes at least one of the following: First delay feedback, the first delay feedback includes: at least one most recent delay feedback before a third time; second delay feedback, the second delay feedback comprising: at least one delay feedback associated with a specific reference signal received most recently before a third time, the specific reference signal being a reference signal used to obtain at least one delay feedback; The third time includes one of the following: the time corresponding to the CSI reference resource associated with the target MTRP CSI, and the CSI reference time slot associated with the target MTRP CSI.

30. The method according to any one of claims 25 to 29, wherein: Before the network side device receives the target MTRP CSI fed back by the terminal, the method further includes: The network side device obtains the delay information fed back by the terminal.

31. The method according to claim 30, wherein: Before the network side device obtains the delay information fed back by the terminal, the method further includes: The network side device configures one of the following to the terminal: at least one first reference signal set, the at least one first reference signal set being associated with a plurality of TRPs; A plurality of first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the plurality of first reference signal sets, and the plurality of first reference signal sets are associated with a plurality of TRPs; A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

32. The method according to claim 31, wherein: In a case where the at least one first reference signal set includes a plurality of first reference signal sets, the method further includes: The network side device receives first capability information fed back by the terminal, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports sending multiple reference signal sets associated with the same time slot, whether the terminal supports sending multiple reference signal sets associated with the same symbol, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and two reference signal sets with the farthest intervals in the multiple reference signal sets.

33. The method according to claim 31, wherein: In the case where the at least one first reference signal set includes one first reference signal set, the method further includes: The network side device receives second capability information fed back by the terminal, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports sending multiple reference signals associated with the same time slot, whether the terminal supports sending multiple reference signals associated with the same symbol, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals among the multiple reference signals, the second symbol interval is the symbol interval between two reference signals among the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals among the multiple reference signals, and two reference signals with the farthest interval among the multiple reference signals.

34. A method for acquiring channel state information, comprising: The network side device sends a target delay indication corresponding to the target CSI report configuration to the terminal, wherein the target delay indication is associated with at least one target delay adjustment value, and the target CSI report configuration is the CSI associated with the target MTRP CSI Report configuration; The network side device receives the target MTRP CSI fed back by the terminal.

35. The method of claim 34, wherein: After the network side device receives the target MTRP CSI fed back by the terminal, the method further includes: The network side device acquires the delay information between MTRPs based on the at least one target delay adjustment value and the delay information in the target MTRP CSI.

36. The method according to claim 34 or 35, wherein: The network side device sends a target delay indication corresponding to the target CSI report configuration to the terminal, including at least one of the following: Sending a first delay indication to the terminal, wherein the first delay indication is used to indicate a set of delay adjustment values ​​associated with a target CSI reporting configuration, wherein the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI; Sending a second delay indication to the terminal, wherein the second delay indication is used to indicate at least one delay adjustment value associated with a target CSI reporting configuration, wherein the target CSI reporting configuration is a CSI reporting configuration associated with the target MTRP CSI; The target delay indication includes at least one of the following: the first delay indication and the second delay indication.

37. The method of claim 36, wherein: Before the network side device sends the target delay indication corresponding to the target CSI report configuration to the terminal, the method further includes at least one of the following: Configuring multiple groups of delay adjustment values ​​for the terminal, wherein each group of target delay adjustment values ​​is associated with a CSI report configuration; A plurality of delay adjustment values ​​are configured for the terminal, wherein each of the delay adjustment values ​​is associated with a CSI report configuration.

38. A method for obtaining delay information, comprising: The network side device sends configuration information to the terminal; The network side device obtains the delay information between multiple TRPs fed back by the terminal; The configuration information includes one of the following: at least one first reference signal set, the at least one first reference signal set being associated with a plurality of TRPs; A plurality of first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the plurality of first reference signal sets, and the plurality of first reference signal sets are associated with a plurality of TRPs; A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

39. The method of claim 38, wherein: In a case where the at least one first reference signal set includes a plurality of first reference signal sets, the method further includes: The network side device receives first capability information fed back by the terminal, wherein the first capability information is used to indicate at least one of the following: whether the terminal supports sending multiple reference signal sets associated with the same time slot, whether the terminal supports sending multiple reference signal sets associated with the same symbol, the first time slot interval supported by the terminal, and the first symbol interval supported by the terminal, wherein the first time slot interval is the time slot interval between two reference signal sets in the multiple reference signal sets, the first symbol interval is the symbol interval between two reference signal sets in the multiple reference signal sets, and the two reference signal sets include one of the following: two adjacent reference signal sets in the multiple reference signal sets, and two reference signal sets with the farthest intervals in the multiple reference signal sets.

40. The method of claim 39, wherein: In the case where the at least one first reference signal set includes one first reference signal set, the method further includes: The network side device receives second capability information fed back by the terminal, wherein the second capability information is used to indicate at least one of the following: whether the terminal supports sending multiple reference signals associated with the same time slot, whether the terminal supports sending multiple reference signals associated with the same symbol, the second time slot interval supported by the terminal, and the second symbol interval supported by the terminal, wherein the second time slot interval is the time slot interval between two reference signals among the multiple reference signals, the second symbol interval is the symbol interval between two reference signals among the multiple reference signals, and the two reference signals include one of the following: two adjacent reference signals among the multiple reference signals, and two reference signals with the farthest interval among the multiple reference signals.

41. A channel state information feedback device, comprising: A first determination module is used to determine at least one target delay feedback associated with the target MTRP CSI to be obtained; The first feedback module is configured to obtain and feed back the target MTRP CSI based on the at least one target delay feedback.

42. A channel state information feedback device, comprising: A second determination module is used to determine a target delay indication associated with a target MTRP CSI to be acquired, wherein the target delay indication is associated with at least one target delay adjustment value; The second feedback module is used to obtain and feed back the target MTRP CSI based on the target delay indication.

43. A device for feedback of delay information, comprising: A first acquisition module, configured to acquire delay information between multiple TRPs based on the configuration of a network-side device; A third feedback module, configured to feed back the acquired delay information between the plurality of TRPs; The configuration of the network side device includes one of the following: at least one first reference signal set, the at least one first reference signal set being associated with a plurality of TRPs; A plurality of first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the plurality of first reference signal sets, and the plurality of first reference signal sets are associated with a plurality of TRPs; A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

44. A device for acquiring channel state information, comprising: A first indication module, configured to indicate at least one target delay feedback associated with the target MTRP CSI to the terminal; The first transceiver module is used to receive the target MTRP CSI fed back by the terminal.

45. A device for acquiring channel state information, comprising: A second indication module is configured to send a target delay indication corresponding to a target CSI reporting configuration to the terminal, wherein the target delay indication is associated with at least one target delay adjustment value, and the target CSI reporting configuration is a CSI reporting configuration associated with a target MTRP CSI; The second transceiver module is configured to receive the target MTRP CSI fed back by the terminal.

46. ​​A device for acquiring delay information, comprising: A third transceiver module, used to send configuration information to the terminal; A second acquisition module is used to obtain the delay information between multiple TRPs fed back by the terminal; The configuration information includes one of the following: at least one first reference signal set, the at least one first reference signal set being associated with a plurality of TRPs; A plurality of first reference signal sets and a first indication, wherein the first indication is used to indicate a target reference signal set for obtaining delay information in the plurality of first reference signal sets, and the plurality of first reference signal sets are associated with a plurality of TRPs; A first reference signal set and a second indication, wherein the second indication is used to indicate a target reference signal in the first reference signal set for obtaining delay information, and the first reference signal set is associated with multiple TRPs.

47. A terminal comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method according to any one of claims 1 to 24 are implemented.

48. A network side device, comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the method described in any one of claims 25 to 40 are implemented.

49. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the method according to any one of claims 1 to 40.

Images