Channel state information (CSI) reporting method, communication apparatus, and communication device

Abstract

The present application relates to the field of communications, and discloses a channel state information (CSI) reporting method, a communication apparatus, and a communication device. The method in the embodiments of the present application comprises: a terminal acquires first information; and on the basis of the first information, the terminal sends second information to a network side device, wherein the second information comprises at least one CSI, and each CSI is associated with at least one reference signal resource or at least one transmission reception point (TRP); wherein the first information comprises at least one of the following: an uplink / downlink time slot configuration of the terminal; an uplink / downlink time slot configuration of the TRP; an uplink / downlink time slot configuration associated with the reference signal resource; a mandatory reference signal resource; an optional reference signal resource; a mandatory TRP, wherein the TRP is associated with the reference signal resource; an optional TRP, wherein the TRP is associated with the reference signal resource; an unavailable reference signal resource; and port restriction information of the reference signal resource, the port restriction information being used for indicating whether a port is closed.

Description

Channel State Information (CSI) reporting method, communication device, and communication equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 29, 2024, with application number 202410230976.1 and invention name “Method, communication device and communication equipment for reporting channel state information CSI”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of communications, and specifically to a method for reporting channel state information (CSI), a communication apparatus, and a communication device. Background Art

[0003] In related technologies, a network-side device may indicate a channel state information (CSI) reporting configuration to a terminal. The terminal may measure an associated channel state information reference signal (associated CSI-RS) sent by the network-side device based on the CSI reporting configuration, calculate the channel state information (CSI), and then report the CSI.

[0004] In some scenarios, the terminal supports connecting to multiple transmission reception points (TRPs), and these multiple TRPs can perform coherent joint transmission (CJT) to serve the terminal. These multiple TRPs may correspond to different uplink and downlink time slot configurations. Therefore, in different time periods, the TRP set serving the terminal may change frequently. In this case, the CSI reporting configuration overhead is large. Therefore, how to perform CSI-RS reporting to reduce the CSI reporting configuration overhead of the network-side device is an urgent problem that needs to be solved. Summary of the Invention

[0005] The embodiments of the present application provide a method, a communication apparatus, and a communication device for reporting channel state information (CSI), which can reduce the overhead of CSI reporting configuration of network-side devices.

[0006] In a first aspect, a method for reporting channel state information (CSI) is provided, the method comprising:

[0007] The terminal obtains the first information;

[0008] Sending second information to a network-side device according to the first information, wherein the second information includes at least one CSI, and each CSI in the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP;

[0009] The first information includes at least one of the following:

[0010] Uplink and downlink time slot configuration of the terminal;

[0011] TRP uplink and downlink timeslot configuration;

[0012] Uplink and downlink time slot configuration associated with reference signal resources;

[0013] Required reference signal resources;

[0014] Optional reference signal resources;

[0015] Required TRP;

[0016] Optional TRP;

[0017] Unavailable reference signal resources;

[0018] The port restriction information of the reference signal resource is used to indicate whether the port is closed.

[0019] In a second aspect, a method for reporting channel state information (CSI) is provided, the method comprising:

[0020] The network side device sends first information to the terminal;

[0021] Receiving second information from the terminal according to the first information, wherein the second information includes at least one CSI, each of the at least one CSI being associated with at least one reference signal resource or at least one transmission reception point (TRP);

[0022] The first information includes at least one of the following:

[0023] Uplink and downlink time slot configuration of the terminal;

[0024] TRP uplink and downlink timeslot configuration;

[0025] Uplink and downlink time slot configuration associated with reference signal resources;

[0026] Required reference signal resources;

[0027] Optional linked reference signal resources;

[0028] Required TRP;

[0029] Optional TRP;

[0030] Unavailable reference signal resources;

[0031] The port restriction information of the reference signal resource is used to indicate whether the port is closed.

[0032] According to a third aspect, a communication device is provided, including:

[0033] a processing unit, configured to obtain first information;

[0034] a communication unit, configured to send second information to a network-side device based on the first information, wherein the second information includes at least one CSI, and each CSI in the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP;

[0035] The first information includes at least one of the following:

[0036] Uplink and downlink time slot configuration of the terminal;

[0037] TRP uplink and downlink timeslot configuration;

[0038] Uplink and downlink time slot configuration associated with reference signal resources;

[0039] Required reference signal resources;

[0040] Optional reference signal resources;

[0041] Required TRP;

[0042] Optional TRP;

[0043] Unavailable reference signal resources;

[0044] The port restriction information of the reference signal resource is used to indicate whether the port is closed.

[0045] In a fourth aspect, a communication device is provided, including:

[0046] A sending unit, configured to send first information to a terminal;

[0047] a receiving unit, configured to receive second information from the terminal according to the first information, wherein the second information includes at least one CSI, and each CSI of the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP;

[0048] The first information includes at least one of the following:

[0049] Uplink and downlink time slot configuration of the terminal;

[0050] TRP uplink and downlink timeslot configuration;

[0051] Uplink and downlink time slot configuration associated with reference signal resources;

[0052] Required reference signal resources;

[0053] Optional reference signal resources;

[0054] Required TRP;

[0055] Optional TRP;

[0056] Unavailable reference signal resources;

[0057] The port restriction information of the reference signal resource is used to indicate whether the port is closed.

[0058] In a fifth aspect, a communication device is provided, which terminal 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.

[0059] In a sixth 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.

[0060] In the seventh aspect, a wireless communication system is provided, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0061] In an eighth aspect, a chip is provided, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect, or to implement the method described in the second aspect.

[0062] In the ninth aspect, a computer program / program product is provided, which is stored in a storage medium and executed by at least one processor to implement the steps of the method described in the first aspect or the steps of the method described in the second aspect.

[0063] In an embodiment of the present application, a terminal may report CSI based on first information, where the first information includes information such as the terminal's uplink and downlink time slot configuration, the TRP's uplink and downlink time slot configuration, and so on. Based on this CSI reporting method, the network-side device only needs to indicate a set of CSI reporting configurations, and the terminal can periodically or dynamically adjust the reference signal resource set or TRP set for the reported CSI based on the first information, and further report the CSI corresponding to the reference signal resource set or TRP set, which helps reduce the CSI reporting configuration overhead of the network-side device. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] FIG1 is a schematic diagram of a communication system provided in an embodiment of the present application.

[0065] FIG2 is a schematic diagram of a flexible duplex mode.

[0066] FIG3 is a schematic diagram of a method for reporting channel state information CSI provided in an embodiment of the present application.

[0067] FIG4 is a schematic diagram of a scenario applicable to an embodiment of the present application.

[0068] FIG5 is an example of a CSI report provided in an embodiment of the present application.

[0069] FIG6 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0070] FIG7 is a schematic diagram of another communication device provided in an embodiment of the present application.

[0071] FIG8 is a schematic diagram of a communication device provided in an embodiment of the present application.

[0072] FIG9 is a hardware structure diagram of a terminal provided in an embodiment of the present application.

[0073] FIG10 is a hardware structure diagram of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0074] 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.

[0075] 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.

[0076] 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.

[0077] It should be noted that the downlink signaling or downlink message in the embodiment of the present application may include but is not limited to at least one of the following: Radio Resource Control (RRC) message, Media Access Control Control Element (MAC CE), and downlink control information (DCI).

[0078] It should be noted that the uplink message in the embodiment of the present application may include but is not limited to at least one of the following:

[0079] Uplink RRC message, MAC CE, uplink control information (UCI).

[0080] 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. th Generation, 6G) communication system.

[0081] 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. Examples of wearable devices include, but are not limited to, 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. The vehicle-mounted device may also be referred to as a vehicle-mounted terminal, vehicle-mounted controller, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application.

[0082] A terminal may also be called user equipment (UE), terminal device, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0083] The network-side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a 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 (AP), or a wireless fidelity (WiFi) node. 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.

[0084] To facilitate understanding of the embodiments of the present application, a cell-free network is described.

[0085] The cell-free massive MIMO (Multiple-Input Multiple-Output, MIMO) system breaks the concept of cells in traditional massive MIMO systems. Instead of being deployed at the same macro base station, a large number of antennas are distributed over a wide area. UEs can also be distributed over this wide area. These antennas are called TRPs or APs, or they can be considered sub-arrays of a large antenna array on the network side. In theory, each UE can communicate with each TRP / sub-array. With the help of the fronthaul network and the Central Processing Unit (CPU), a large number of geographically dispersed TRPs can jointly serve a smaller number of UEs. The CPU uses channel statistics to perform joint detection. It is expected to be applied to next-generation indoor and hotspot coverage scenarios, such as smart factories, train stations, shopping malls, stadiums, subways, hospitals, community centers, or university campuses.

[0086] Traditional deployment of multiple TRP (multiple TRP) networks usually adopts the time division duplex (TDD) transmission mode, and assumes that the uplink and downlink time slot configurations of each TRP in the network are the same. The network side can determine the uplink and downlink time slot configuration parameters based on the overall uplink and downlink traffic requirements in the entire Cell-free network.

[0087] To facilitate understanding of the embodiments of the present application, a full-duplex (FD) cell-free architecture is described.

[0088] In a full-duplex (FD) cell-free architecture, each TRP is configured with different uplink and downlink timeslots, allowing uplink and downlink data transmission within the same time and frequency resources. In this architecture, the uplink and downlink timeslot configurations of the TRP remain unchanged. By controlling the UE's uplink transmission or downlink reception with different TRPs, and by controlling the corresponding quasi-co-located (QCL) relationship for uplink transmission and the TCL relationship for downlink transmission, more flexible full-duplex timeslot configuration for the UE is achieved.

[0089] The advantage of using this method is that the terminal can meet the uplink and downlink transmission of any proportion and demand by connecting TRPs with different uplink and downlink time slot configurations; because the network side does not need to frequently adjust the uplink and downlink time slot configurations of each TRP, it can save network side resource overhead and implementation complexity, thereby reserving more network resources for more comprehensive interference measurement, joint optimization and transmission control.

[0090] The disadvantage is that there will be cross-link interference (CLI) between different TRPs, that is, the TRP in the downlink time slot will cause cross-link interference between TRPs to the TRP in the uplink time slot at the same time, and the UE in the uplink time slot will cause cross-link interference between UEs to the UE in the downlink time slot at the same time. However, considering that the CPU in the Cell-free network can control each TRP to achieve more accurate CLI measurement, and by optimizing the UE-TRP connection relationship and network-side beamforming, the impact of CLI is effectively reduced. In addition, for the interference problem between TRPs, such as the interference of TRP1 to TRP2, the base station determines the content of the TRP1 downlink signal. TRP2 receives the TRP1 downlink signal and can estimate the interference channel between TRP1 and TRP2 through the reference signals such as DMRS carried therein. Through baseband signal processing, the TRP1 downlink signal interference is eliminated from the TRP2 received signal.

[0091] In some scenarios, a flexible duplex mode is being considered: non-overlapping sub-band full duplex (SBFD) on the network side, meaning that uplink and downlink transmissions can be performed simultaneously at different frequency domain locations at the same time. To avoid interference between uplink and downlink, a certain guard band (Guard Band) can be reserved between the frequency domain locations (corresponding to the duplex subbands) corresponding to different transmission directions; and half-duplex on the terminal side, meaning that, consistent with TDD, only uplink or downlink transmissions can be performed at the same time, not both. It is understandable that in this duplex mode, the uplink and downlink transmissions on the network side at the same time can only be directed to different terminals, meaning the terminals are still half-duplex.

[0092] Figure 2 shows a schematic diagram of flexible duplexing. Within a portion of downlink symbols, the network semi-statically divides the frequency domain of a single carrier into three duplex subbands. Downlink subbands are located on either side of the carrier, while the center is occupied by an uplink subband. This reduces interference with adjacent carriers. In the third time slot, UE1 and UE2 transmit in uplink and receive in downlink, respectively, in half-duplex mode.

[0093] In some scenarios, sub-band full-duplex assumes that the uplink and downlink use different sub-bands of a carrier in the same time period; full-duplex cell-free networks assume that different TRPs operate on the same sub-band / frequency resources.

[0094] Under the assumption of a full-duplex cell-free network, considering that multiple TRPs adopt different uplink and downlink time slot configurations, different TRP clusters can perform coherent joint transmission (CJT) to serve the terminal in different time periods. This leads to different CJT combinations and channel conditions in different time periods. Therefore, the terminal needs to measure and feedback the channel state information (CSI) based on the TRP connection relationship in different time ranges.

[0095] In related technologies, each time a terminal reports CSI-RS measurements, it only feeds back one CJT combination and the corresponding CSI measurement result. If multiple CJT combinations need to be measured, the network side needs to configure multiple CJT report configurations; or, the network side determines the CSI of other CJT combinations based on the UE's feedback. However, the CSI determined in this way is inaccurate, and the CSI reporting mechanism needs to be enhanced.

[0096] The following describes in detail the method for reporting channel state information (CSI) provided in the embodiments of the present application through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0097] FIG3 is a schematic diagram of a method for reporting channel state information (CSI) according to an embodiment of the present application. As shown in FIG3 , the method 300 includes at least part of the following:

[0098] S310: The terminal obtains first information.

[0099] S320. According to the first information, second information is sent to the network side device, wherein the second information includes at least one CSI, and each CSI in the at least one CSI is associated with at least one reference signal resource or at least one transmitting / receiving point TRP.

[0100] In an embodiment of the present application, the reference signal resource may be a downlink reference signal resource, such as a CSI-RS resource, or may be other downlink reference signal resources. The present application does not limit this. The following description uses the reference signal resource as a CSI-RS resource as an example, but the present application is not limited to this.

[0101] Similarly, the reference signal may refer to a downlink reference signal, such as CSI-RS, a synchronization signal block (Synchronization Signal Block, SSB), a phase tracking reference signal (Phase Tracking Reference Signal, PTRS), and a demodulation reference signal (Demodulation Reference Signal, DMRS), or other downlink reference signals. This application does not limit this. Below, the reference signal is CSI-RS as an example for explanation, but this application is not limited to this.

[0102] In the embodiment of the present application, a reference signal resource and a TRP are associated. When a piece of information or a signal is associated with a reference signal resource, it can also be understood that the information or signal is associated with the TRP associated with the reference signal resource. Similarly, when a piece of information or a signal is associated with a TRP, it can also be understood that the information or signal is associated with the reference signal resource associated with the TRP.

[0103] For example, if the CSI is associated with a reference signal resource, it can also be understood that the CSI is associated with the TRP associated with the reference signal resource, or if the CSI is associated with a reference signal resource set, it can be understood that the CSI is associated with the TRP set associated with the reference signal resource set.

[0104] For example, if the CSI is associated with a TRP, it can also be understood that the CSI is associated with the reference signal resources associated with the TRP, or if the CSI is associated with a TRP set, it can be understood that the CSI is associated with the reference signal resource set associated with the TRP set.

[0105] In some implementations, the association between the reference signal resource and the TRP may be indicated by a network-side device, or may be predefined.

[0106] In an embodiment of the present application, the reference signal resource and the reference signal can be replaced with each other. For example, the reference signal resource and the TRP have an associated relationship, which can also be replaced with the reference signal and the TRP have an associated relationship; the second information includes a reference signal resource set associated with each CSI in at least one CSI, which can also be replaced with the second information including a reference signal resource set associated with each CSI in at least one CSI.

[0107] In an embodiment of the present application, the association between the reference signal resource / reference signal and the TRP may mean that the TRP is mapped to the reference signal resource, or that the TRP supports sending the reference signal.

[0108] In the embodiment of the present application, the association relationship between CSI and reference signal resource / reference signal may mean that the CSI is determined according to the reference signal resource / reference signal, for example, the CSI is determined by measuring the reference signal.

[0109] In an embodiment of the present application, the association relationship between CSI and TRP may mean that the CSI is determined based on the reference signal resource / reference signal associated with the TRP, for example, the CSI is determined by measuring the reference signal associated with the TRP.

[0110] In some embodiments of the present application, the method 300 further includes:

[0111] The terminal receives reference signal resource configuration from the network side device.

[0112] In some embodiments, the reference signal resource configuration can be used to configure reporting quantities, such as CSI-related reporting quantities (e.g., channel quality indication (Channel Quantity Indicator, CQI), precoding matrix indication (Precoding Matrix Indicator, PMI), rank indication (Rank Indication, RI), etc.), reference signal measurement quantities (e.g., reference signal received power (Reference Signal Receiving Power, RSRP), signal to interference plus noise ratio (Signal to Interference plus Noise Ratio, SINR), received signal strength indication (Received Signal Strength Indication, RSSI)), etc.

[0113] Optionally, the reference signal resource configuration may also configure reference signal resources for measurement (eg, reference signal index, time resources where the reference signal is located, frequency domain resources, etc.), and information such as time resources and frequency domain resources for reporting CSI.

[0114] In a specific embodiment, the reference signal resource configuration is included in a CSI reporting configuration (CSI-Report config), or the reference signal resource configuration is a CSI-Report config.

[0115] In some embodiments, the terminal may measure a reference signal based on the reference signal resources configured in the reference signal resource configuration to determine the CSI.

[0116] In some embodiments, the terminal may send the second information based on the time resources and / or frequency domain resources configured for reporting CSI by the reference signal resource configuration.

[0117] Optionally, the frequency domain resources used to report CSI can be located within the uplink transmission time period of the terminal, or can be located within the downlink transmission time period of the terminal, or can be located within the duplex transmission time period of the terminal. For example, for a terminal with full-duplex capability, the network side device can configure the frequency domain resources for uplink transmission (such as uplink subband) and the frequency domain resources for downlink transmission (such as downlink subband) within the duplex transmission time period of the terminal. The terminal can then send CSI on the frequency domain resources for uplink transmission (such as uplink subband) within the duplex transmission time period.

[0118] In some embodiments, the at least one CSI may be sent via a CSI report, or the at least one CSI may be reported sequentially according to the uplink and downlink time slot configuration of the terminal and the uplink and downlink time slot configuration of the TRP.

[0119] In some embodiments, the first information can be used by the terminal to determine which reference signal resource set and / or CSI associated with the TRP set to report. For example, the first information can be used to determine the TRP set or CSI associated with the reference signal resource set for which CJT can be performed. Specifically, for example, the first information includes restriction information of the reference signal resource (for example, indicating whether the reference signal resource is available and whether it is required), port restriction information of the reference signal resource (for example, indicating whether the port of the reference signal resource is available, whether it is closed, or whether it is open), and restriction information of the TRP (for example, indicating whether the TRP is available and whether it is required).

[0120] In some embodiments, the first information includes but is not limited to at least one of the following:

[0121] Uplink and downlink time slot configuration of the terminal;

[0122] Uplink and downlink time slot configurations of a TRP, for example, including uplink and downlink time slot configurations of at least one TRP to which the terminal is connected;

[0123] Uplink and downlink time slot configuration associated with reference signal resources;

[0124] Mandatory reference signal resources, that is, reference signal resources that must be selected when determining CSI, or reference signal resources that must be associated with CSI;

[0125] Optional reference signal resources, that is, the reference signal resources can be selected or not selected when determining CSI, or are also called optional reference signal resources associated with CSI;

[0126] Mandatory TRP, that is, the TRP that must be selected when determining CSI, or the optional TRP associated with CSI;

[0127] Optional TRP, which means that the TRP can be selected or not when determining CSI, or is also called optional TRP associated with CSI;

[0128] Unavailable reference signal resources, i.e., these reference signal resources cannot be selected when determining CSI;

[0129] Refer to the port restriction information of the signal resource.

[0130] Optionally, the port restriction information is used to indicate whether the port of the reference signal resource is closed (or whether it is available), for example, indicating closing some or all ports of the reference signal resource, or indicating available ports or unavailable ports of the reference signal resource.

[0131] In some embodiments, the restriction information of reference signal resources (e.g., mandatory reference signal resources, optional reference signal resources), the port restriction information of reference signal resources (e.g., indicating whether the port is closed), and the restriction information of TRP (e.g., mandatory TRP, optional TRP) can be indicated through the reference signal resource configuration, or can be configured separately, which is not limited in this application.

[0132] In some embodiments, for unavailable reference signal resources, the terminal may not perform measurements based on the reference signal resources, or, for reference signal resources with some ports closed, the terminal may not measure the closed ports. In this way, the CSI reported by the terminal is not associated with the reference signal resources or the port.

[0133] In some embodiments, when some ports of the reference signal resource are closed, the network-side device may determine the dimension of the basis vector of the codebook based on the valid ports, and further indicate the codebook index.

[0134] In some embodiments, the reference signal resource set associated with the CSI reported by the terminal may include mandatory reference signal resources and, optionally, optional reference signal resources. Alternatively, the TRP set associated with the CSI reported by the terminal may include mandatory TRPs and, optionally, optional TRPs.

[0135] The uplink and downlink time slot configuration (or uplink and downlink time slot format) in the embodiments of the present application can be used to configure the transmission direction of a terminal or TRP over multiple time units, or in other words, to configure the time length of a terminal or TRP in at least one transmission direction.

[0136] For example, the transmission direction may include at least one of the following:

[0137] Uplink (UL, abbreviated as U) transmission, downlink (DL, abbreviated as D) transmission, flexible (Flexible, abbreviated as F) transmission, or special (Special, abbreviated as S) transmission, duplex transmission.

[0138] The special transmission is a special transmission including a protection interval, and the time unit corresponding to the special transmission may refer to a special time unit including a protection interval. For the network side device, the special transmission may be considered as a flexible transmission.

[0139] In some embodiments, when a time period is configured for uplink transmission, the time period can be considered as an uplink transmission time period; when a time period is configured for downlink transmission, the time period can be considered as a downlink transmission time period; when a time period is configured for flexible transmission, the time period can be considered as a flexible transmission time period; when a time period is configured for duplex transmission, the time period can be considered as a duplex transmission time period, wherein frequency domain resources for downlink transmission (e.g., downlink subband) and frequency domain resources for uplink transmission (e.g., uplink subband) are simultaneously configured in the duplex transmission time period, and the terminal can perform uplink transmission and downlink transmission respectively on the corresponding frequency domain resources.

[0140] In some embodiments, the time unit may be expressed in units of time lengths such as radio frames, subframes, time slots, and OFDM symbols.

[0141] The uplink and downlink time slot configuration in the embodiment of the present application may also be referred to as a TDD time slot format. For example, in the NR system, the uplink and downlink time slot configuration is configured by the parameter TDD-UL-DL-configcommon.

[0142] In some embodiments, the uplink and downlink time slot configuration associated with the reference signal resource can be understood as: the uplink and downlink time slot configuration of the TRP associated with the reference signal resource.

[0143] In some embodiments, the terminal obtaining the first information may include:

[0144] The terminal obtains first information from the network side device.

[0145] That is, the first information may be indicated by the network side device.

[0146] In other embodiments, the first information may also be predefined.

[0147] In some other embodiments, part of the first information is indicated by the network-side device, and the rest of the information is predefined, which is not limited in this application.

[0148] In some embodiments, the second information is included in a CSI report, or the second information may also be considered as a CSI report.

[0149] In some embodiments, the terminal supports connection with at least two TRPs. The terminal can determine the TRP set or reference signal resource set that supports downlink transmission (such as CJT) within the target time of the terminal based on the uplink and downlink time slot configuration of the terminal and the uplink and downlink time slot configuration of the at least two TRPs, which is recorded as the first set, wherein the target time period is the time period in which the terminal supports downlink transmission. The first set can be considered as a valid TRP set or reference signal resource set within the target time period, wherein each target time period of the terminal can correspond to one or more first sets, that is, within a target time period of the terminal, there may be one TRP set that can perform downlink transmission, or there may be multiple TRP sets.

[0150] In some scenarios, such as in a cell-free network architecture, the uplink and downlink time slot configurations of multiple TRPs to which the terminal is connected may be different. Then, within the target time period of the terminal, the set of TRPs supporting downlink transmission may also be different. Therefore, within different target time periods, the transmission between the terminal and the TRP may be a single TRP (STRP) transmission, or it may be a joint transmission of multiple TRPs (such as CJT), that is, the first set may include a single TRP or a single reference signal resource, or it may also include multiple TRPs or multiple reference signal resources. Accordingly, within different target time periods, the reference signal on which the terminal determines the CSI may come from one TRP, or it may come from multiple TRPs.

[0151] In an embodiment of the present application, a first set can be considered as a measurement hypothesis, that is, the terminal assumes that within the target time period, measurements can be performed based on the first set to determine the CSI associated with the first set, or it can be considered as a transmission hypothesis, that is, the terminal can assume that within the target time period, the multiple TRPs can perform CSJ or STRP transmission, then the terminal can perform measurements based on the CSJ or STRP transmission to determine the CSI associated with the first set.

[0152] In some embodiments, all valid TRP sets or reference signal resource sets corresponding to a target time period may be recorded as a set, or may be considered as a set of measurement hypotheses.

[0153] In some embodiments, the target time period of the terminal may be the downlink transmission time period of the terminal, or it may be the flexible transmission time period of the terminal, or it may be the duplex transmission time period of the terminal. For example, when the terminal has full-duplex capability (for example, supports SBFD), the target time period of the terminal may be the duplex transmission time period of the terminal, and the terminal may perform downlink transmission on the frequency domain resources (for example, downlink subband) used for downlink transmission within the duplex transmission time period.

[0154] In some embodiments of the present application, the method 300 further includes:

[0155] The terminal obtains fourth information, where the third information is used to indicate a candidate set, and the candidate set includes a candidate reference signal resource set or a candidate TRP set.

[0156] For example, the candidate set may include a TRP set (or CJT set) consisting of all TRPs that can support downlink transmission with the terminal, or a reference signal resource set or reference signal set associated with the TRP set, such as a CSI-RS set.

[0157] In some embodiments, the fourth information may be received by the terminal from a network-side device, or may be predefined.

[0158] In some specific embodiments, the fourth information may be carried in a reference signal resource configuration.

[0159] In this way, the network side device only needs to indicate a set of reference signal resource configurations, indicating all reference signal resource sets or TRP sets that support CJT. The terminal only needs to periodically adjust or dynamically adjust the reference signal resource set or TRP set for reporting CSI according to the uplink and downlink time slot configuration of TRP, and then report CSI. The network side device can obtain the CSI corresponding to all possible reference signal resource sets or TRP sets, which is beneficial to reducing the overhead of CSI report configuration of the network side device.

[0160] In some embodiments, the second information further includes third information, the third information being used to indicate a target set associated with (or corresponding to) each CSI in the at least one CSI, wherein the target set includes a target reference signal resource set or a target TRP set, and each CSI is determined based on the associated target set. The target reference signal resource set includes one or more reference signal resources, and the target TRP set includes one or more TRPs.

[0161] In some embodiments, the target set may be the first set. For example, the third information includes indication information of the first set associated with the CSI, such as index information of the first set, or a measurement hypothesis index.

[0162] For example, in a scenario where the terminal supports connection with at least two TRPs, the terminal can determine the TRP set or reference signal resource set (i.e., the first set) that supports downlink transmission (e.g., CJT) within the target time period of the terminal based on the uplink and downlink time slot configuration of the terminal and the uplink and downlink transmission time slot configuration of the at least two TRPs, further perform measurements based on the TRP set or reference signal resource set, obtain the CSI corresponding to each TRP set or reference signal resource set, and then feedback the CSI corresponding to each TRP set or reference signal resource set. Optionally, the first set associated with the reported CSI can also be fed back to the network side device.

[0163] In some embodiments, the second information may not include the third information. In this case, the terminal can determine the target set for reporting CSI based on predefined rules, and further report the CSI associated with the target set. Correspondingly, the network side device can determine the target set associated with the CSI reported by the terminal based on the predefined rules, thereby ensuring that the terminal and the network side device have a consistent understanding of the target set associated with the CSI.

[0164] For example, when a terminal performs measurements and reports CSI based on the first set, the terminal may not provide feedback to the network device regarding the first set associated with the reported CSI. That is, the second information may not include the third information. In this case, the network device may determine the CSI associated with the CSI reported by the terminal based on the terminal's uplink and downlink time slot configuration and the uplink and downlink transmission time slot configurations of the at least two TRPs.

[0165] Optionally, when the terminal reports multiple CSIs, the order of the multiple CSIs can be arranged according to the number of associated TRPs or reference signal resources and / or the index order of the associated TRPs or reference signal resources.

[0166] In some other embodiments, the target set may include some reference signal resources or TRPs in the first set. In this case, the third information includes indication information of the first set corresponding to the target set associated with each CSI and first indication information, where the first indication information is used to indicate the reference signal resources or TRPs selected by the terminal from the first set to constitute the target set.

[0167] It should be understood that the present application does not limit the specific indication method of the first indication information. For example, a bitmap method can be used to indicate the reference signal resource or TRP selected by the terminal in the first set.

[0168] For example, the length of the first indication information can be determined according to the number of reference signal resources or TRPs in the first set.

[0169] For example, the first indication information is a bitmap sequence, and the length of the bitmap sequence is the same as the number of reference signal resources or TRPs in the first set.

[0170] It should be noted that, when the first information includes the uplink and downlink time slot configuration of the terminal and TRP, the number of reference signal resources or TRPs included in the first set may be different in different time periods. It can also be understood that the length of the first indication information is determined based on the uplink and downlink time slot configuration of the terminal and TRP.

[0171] For example, based on the uplink and downlink time slot configuration of the terminal and TRP, it is determined that within the target time period of the terminal, the candidate set configured by the network (for example, the CSI-RS set) is {CSI-RS#1, CSI-RS#2, CSI-RS#3}, among which only the transmission direction associated with CSI-RS#1 and CSI-RS#2 is downlink, then the length of the first indication information reported by the terminal can be 2 bits.

[0172] It should be noted that, in the following embodiments, the target set associated with the CSI is taken as the first set as an example for description, but the present application is not limited to this.

[0173] In conjunction with the specific example shown in FIG4 , taking the target set as the first set as an example, the reporting method of CSI is described.

[0174] In the example of Figure 4, the terminal is connected to TRP1, TRP2, and TRP3, and the candidate set configured by the network side device is {CSI-RS#1, CSI-RS#2, CSI-RS#3} or {TRP1, TRP2, TRP3}, where CSI-RS#1 is associated with TRP1, CSI-RS#2 is associated with TRP2, and CSI-RS#3 is associated with TRP3. The uplink and downlink time slot format of TRP1 is uplink and downlink time slot format #1, that is, DDDSU, or in other words, CSI-RS#1 is associated with (TRP The uplink and downlink time slot format of TRP1 is uplink and downlink time slot format #1, namely DDDSU; the uplink and downlink time slot format of TRP2 is uplink and downlink time slot format #2, namely DSUUU, or in other words, CSI-RS#2 is associated with uplink and downlink time slot format #2 (of TRP2), namely DSUUU; the uplink and downlink time slot format of TRP3 is uplink and downlink time slot format #3, namely DDSUU, or in other words, CSI-RS#3 is associated with uplink and downlink time slot format #3 (of TRP3), namely DDSUU, and the uplink and downlink time slots of the terminal are configured as uplink and downlink time slot format #3, namely DDDUU.

[0175] Based on the above-mentioned uplink and downlink time slot configuration, the terminal can determine that in the first downlink time period (slot1 and slot2), the TRP set supporting downlink transmission is {TRP1, TRP2, TRP3}, which is associated with the first CSI-RS set {CSI-RS#1, CSI-RS#2, CSI-RS#3}, that is, the first set corresponding to the first downlink time period is {TRP1, TRP2, TRP3} or {CSI-RS#1, CSI-RS#2, CSI-RS#3}; in the second downlink time period (slot3), the TRP set supporting downlink transmission is {TRP1, TRP3}, which is associated with the second CSI-RS set {CSI-RS#1, CSI-RS#3}, that is, the first set corresponding to the second downlink time period is {TRP1, TRP3} or {CSI-RS#1, CSI-RS#3}. The terminal then calculates the first CSI corresponding to the first CSI-RS set and the second CSI corresponding to the second CSI-RS set based on the reference signal resource configuration corresponding to the first CSI-RS set and the reference signal resource configuration corresponding to the second CSI-RS set. The terminal may provide feedback on the first CSI and the second CSI. Optionally, the CSI-RS set or TRP set associated with the first CSI and the CSI-RS set or TRP set associated with the second CSI may also be indicated in the CSI report.

[0176] Optionally, the first CSI and the second CSI may be reported in one CSI report, or the first CSI may be reported first and then the second CSI according to the timing of the target time periods corresponding to the first CSI and the second CSI. This application does not limit this.

[0177] The configuration method of the first information is described below in conjunction with specific embodiments.

[0178] In some embodiments of the present application, the first information may be periodically configured or semi-statically configured.

[0179] For example, the network-side device may send second indication information to the terminal, where the second indication information is used to indicate the valid time or period of the first information, such as the valid time or period of the uplink and downlink time slot configuration of the terminal. During the valid time of the first information, the CSI fed back by the terminal and the associated reference signal resource set or TRP set remain unchanged.

[0180] It should be understood that the present application does not limit the unit of the effective time or period. For example, the length of the effective time or period may be the length of at least one time unit. Optionally, the time unit may be a wireless frame, a subframe, a time slot, an orthogonal frequency-division multiplexing (OFDM) symbol, etc. The present application does not limit this.

[0181] In some embodiments, the terminal sends a first message to the network device, requesting the network device to update the first information. Furthermore, the network device may send a second message to the terminal, indicating the updated first information. For example, the updated first information may include updated uplink and downlink time slot configurations. The terminal may re-determine the CSI reported within the validity period of the updated first information based on the updated uplink and downlink time slot configurations.

[0182] For example, when the validity period of the first information expires, the terminal sends a first message to the network-side device, requesting the network-side device to update the first information.

[0183] Optionally, the first message may include the uplink and downlink transmission requirements of the terminal, that is, the terminal may use the uplink and downlink transmission requirement request message to request the network side device to update the first information.

[0184] Optionally, the validity period or period of the updated first information may be carried in the second message. That is, when the network side device configures the first information for the terminal, it also configures the validity period or period of the first information.

[0185] It should be noted that the validity period of the first information can include multiple CSI reporting periods, and the CSI-Report configuration of the network device can be the same within different time resources (for example, different validity periods). In other words, within different validity periods (corresponding to different first information), the reference signal resource configuration used by the terminal can be the same, but the first information can be different. In this way, the network device does not need to frequently update the reference signal resource configuration, but only needs to update the first information, which helps reduce the overhead of the network device in performing reference signal resource configuration.

[0186] 4 , assuming that within the first, second, and third time resources, the terminal's uplink and downlink timeslot configurations are configured as DDDUU, DDUDU, and DDDDU, respectively, and the reference signal resource configurations indicated by the network device are all associated with the TRP set {TRP1, TRP2, TRP3}. Then, within the first time resource, the terminal can feedback CSI1 and CSI2, corresponding to the TRP sets {TRP1, TRP2, TRP3} and {TRP1, TRP3}, respectively. Within the second time resource, the terminal can feedback CSI1 and CSI3, corresponding to the TRP sets {TRP1, TRP2, TRP3} and {TRP1}, respectively. Within the third time resource, the terminal can feedback CSI1, CSI2, and CSI3, corresponding to the TRP sets {TRP1, TRP2, TRP3}, {TRP1, TRP3}, and {TRP1}, respectively. Figure 5 is an example of a CSI report. The network side device performs scheduling in different time periods (slot1, slot2, slot3, etc.) within the corresponding time resources (first time resources, second time resources or third time resources) according to the CSI report of the terminal.

[0187] In this way, after the network side device configures each TRP in different time resources and the uplink and downlink time slot configuration of the terminal for the terminal, the network side device and the terminal can determine which TRPs can be downlinked with the terminal in each time period, and further determine the TRP set or reference signal resource set associated with the CSI fed back by the terminal. Therefore, the network side device does not need to update the reference signal resource configuration within these multiple time resources, which is beneficial to saving the signaling overhead of the network side device.

[0188] In other embodiments of the present application, the network side device may also update the first information through downlink signaling.

[0189] In some embodiments, the network device may also periodically update the reference signal resource configuration. For example, the network device may configure the terminal with a valid time or period for the reference signal resource configuration, during which the reference signal resource configuration is valid. Alternatively, the network device may update the reference signal resource configuration via downlink signaling.

[0190] In some implementations, the first information and the reference signal resource configuration may be configured through different downlink signaling, or may be configured through the same downlink signaling, which is not limited in this application.

[0191] For example, the network-side device may send a third message to the terminal, where the third message may include the updated first information and / or reference signal resource configuration.

[0192] Exemplarily, the third message may include at least one of the following:

[0193] Updated uplink and downlink timeslot configurations of the terminal;

[0194] Updated uplink and downlink timeslot configuration of TRP;

[0195] Uplink and downlink time slot configurations associated with the updated reference signal configuration;

[0196] updated reference signal resource configuration;

[0197] Updated connection relationship between the terminal and TRP.

[0198] Correspondingly, the terminal may receive a third message from the network-side device, update the second information according to the third message, and / or update the reference signal resource configuration. Optionally, updating the second information may include updating the number of CSI groups included in the second information, or updating the reference signal resource set or TRP set associated with the CSI.

[0199] In some embodiments, before the terminal receives the third message from the network-side device, the terminal may send a fourth message to the network-side device, where the fourth message is used to request updating of the second information and / or reference signal resource configuration.

[0200] Optionally, the fourth message may include the terminal's uplink and downlink transmission requirements. For example, the terminal's uplink and downlink transmission requirements may be temporary data transmission requirements. That is, the terminal may trigger the network-side device to send downlink signaling to instruct the terminal to update the second information and / or reference signal resource configuration by reporting the temporary data transmission requirements.

[0201] Optionally, the uplink and downlink transmission requirements of the terminal include the requested uplink and downlink transmission duration and the required uplink and downlink time slot configuration, the ratio of uplink and downlink transmission time, or Quality of Service (QoS) requirements.

[0202] In response to the fourth message, the network-side device may send a third message to indicate to the terminal the temporary uplink and downlink time slot configuration, the effective time of the uplink and downlink time slot configuration, the reference signal resource configuration, etc. Optionally, the network-side device may further instruct the terminal to update the second information. Optionally, the effective time may be used to indicate the duration of the temporary uplink and downlink time slot configuration, or may also indicate the effective start time and effective duration of the temporary uplink and downlink time slot configuration.

[0203] In some embodiments, the network-side device sending the third message may be triggered under specific circumstances.

[0204] In some implementations, when the uplink and downlink time slot configurations of the TRP change, the network side device sends downlink signaling to instruct the terminal to update the second information.

[0205] For example, when the uplink and downlink time slot configuration of TRP changes, the network side device sends a third message to update / indicate the updated uplink and downlink time slot configuration of TRP. Accordingly, the terminal updates the reported CSI and the associated reference signal resource set or TRP set according to the updated uplink and downlink time slot configuration of TRP.

[0206] In some other implementations, when the connection relationship between the terminal and the TRP changes or the reference signal resource configuration changes, the network side device sends a downlink signaling to indicate the second information of the terminal update.

[0207] For example, the network side device sends a third message to update the reference signal resource configuration and instructs to update the second information. The UE updates the reported CSI and the corresponding reference signal resource set or TRP set based on the updated reference signal resource set and the uplink and downlink time slot configuration of the TRP associated with the reference signal resource in the reference signal resource set.

[0208] In some embodiments of the present application, the method 300 further includes:

[0209] The terminal sends third indication information to the network side device, where the third indication information is used to indicate whether the first information is successfully received.

[0210] Optionally, the third indication information may be used to indicate a positive acknowledgment (ACK), indicating that the first information is successfully received, or a negative acknowledgment (NACK), indicating that the first information is not successfully received.

[0211] It should be noted that the third indication information may be sent separately, or the third indication information may be included in the second information. For example, the second information and the third indication information may both be carried in the CSI report.

[0212] Correspondingly, the network-side device can receive a third indication information from the terminal, and determine whether the terminal has successfully received the first information based on the third indication information, thereby being able to determine whether the CSI reported by the terminal is determined based on the first information, which is conducive to ensuring that the terminal and the network-side device have a consistent understanding of the target set associated with the CSI.

[0213] The following describes the specific implementation of determining the reported CSI or the associated first set based on the uplink and downlink time slot configuration of the terminal and TRP in combination with a specific embodiment.

[0214] Case 1: Flexible transmission time period of the terminal

[0215] In this case, whether the flexible time period of the terminal can support downlink transmission can be determined based on the uplink and downlink time slot configuration of TRP.

[0216] For example, if within the first time period, the terminal is configured for flexible transmission (flexible), the first time period is the flexible transmission time period of the terminal. Within the first time period, if there is at least one TRP in the TRPs to which the terminal is connected that is configured for downlink transmission, then the first time period can be considered as the downlink transmission time period of the terminal, that is, the first time period is the target time period of the terminal, or in other words, the terminal supports downlink transmission within the first time period. Then within the first time period, the terminal can measure the CSI-RS sent by the network-side device, and determine the TRP set that supports downlink transmission based on the uplink and downlink time slot configuration of the connected TRP, for example, the TRPs configured for downlink transmission are grouped into a TRP set, and the CSI corresponding to the TRP set is fed back. Optionally, the TRP set or the associated reference signal resource set can also be fed back.

[0217] Optionally, within the first time period, if all TRPs connected to the terminal are configured for uplink transmission (uplink receiving state) or flexible transmission, then the first time period can be considered as the uplink transmission time period of the terminal, that is, the terminal does not support downlink transmission in the first time period, or in other words, the first time period is not the target time period of the terminal.

[0218] Case 2: Downlink transmission time period of the terminal.

[0219] For example, if the terminal is configured for downlink transmission within the second time period, the second time period may be considered as the downlink transmission time period of the terminal, that is, the second time period is the target time period of the terminal.

[0220] It should be noted that, when in the second time period, some of the TRPs in the TRP set connected by the terminal are configured for downlink transmission, some are configured for flexible transmission, and the other are configured for uplink transmission, the TRPs configured for uplink transmission do not participate in the measurement and CSI calculation, the TRPs configured for downlink transmission participate in the measurement and CSI calculation, and the subset of TRPs configured for flexible transmission optionally participates in the measurement and CSI calculation, that is, the first set may include TRPs configured for downlink transmission, and optionally also include at least one TRP configured for flexible transmission. Optionally, the terminal may report to the network side device the TRP selected from the TRP set configured for flexible transmission that participates in the measurement and CSI calculation.

[0221] In some embodiments, if, within the second time period, all TRPs to which the terminal is connected are configured for downlink transmission, the terminal may determine that the valid TRP set within the second time period includes all TRPs associated with the terminal, that is, the first set includes all TRPs associated with the terminal, and the terminal may feedback the CSI corresponding to the TRP set. Optionally, the TRP set or the associated reference signal resource set may also be fed back.

[0222] In some embodiments, if within the second time period, there are N TRPs among the TRPs associated with the terminal that are configured for flexible transmission, N≥1, the terminal can report the CSI associated with the TRP set of any M TRPs including the N TRPs and / or the CSI associated with the TRP set not including the M TRPs, where 1≤M≤N.

[0223] That is, the first set may include: a TRP set including a first type TRP and / or a TRP set not including a first type TRP, wherein the first type TRP is a TRP configured for flexible transmission in a downlink transmission time period of the terminal.

[0224] Taking the example in Figure 4 as an example, in the first downlink time period (slot1 and slot2), TRP1, TRP2, and TRP3 are all configured for downlink transmission. The terminal determines that the TRP set supporting downlink transmission in the first downlink time period is {TRP1, TRP2, TRP3}, which is associated with the first CSI-RS set {CSI-RS#1, CSI-RS#2, CSI-RS#3}. Then, the terminal can report the first CSI. Optionally, the CSI-RS set or TRP set associated with the first CSI can also be reported.

[0225] In the second downlink time period (slot3), TRP3 is configured for flexible transmission, then the TRP3 can perform downlink transmission, in which case the effective TRP set in the second downlink time period is {TRP1, TRP3} (associated with the second CSI-RS set {CSI-RS#1, CSI-RS#3}); or, the TRP3 may also perform uplink transmission, in which case the effective TRP set in the second downlink time period is {TRP1} (corresponding to the case of STRP) (associated with the third CSI-RS set {CSI-RS#1}); then the terminal feeds back the second CSI and / or the third CSI, wherein the second CSI is associated with {TRP1, TRP3} and the third CSI is associated with {TRP1}. Optionally, the CSI-RS set or TRP set corresponding to each CSI can also be fed back.

[0226] In some embodiments, the first CSI, the second CSI, and the third CSI may be included in the same CSI report.

[0227] In some embodiments, the above method for determining the first set is only an example, and the terminal may also use other methods to determine the first set, which is not limited in this application. Optionally, when the terminal and the network-side device use a consistent method to determine the first set, the terminal may not indicate to the network-side device the TRP set or reference signal resource set associated with the reported CSI.

[0228] Case 3: Duplex transmission time period of the terminal.

[0229] For example, when the terminal has full-duplex capability, the network-side device can configure frequency domain resources (such as downlink subbands) for downlink transmission within the uplink transmission time period of the terminal, and the terminal can perform downlink transmission on the frequency domain resources for downlink transmission within the uplink transmission time period, that is, the target time period of the terminal may include the uplink transmission time period of the terminal, wherein the uplink transmission time period is configured as a frequency domain resource for downlink transmission, and the first set may include a TRP configured as downlink transmission and / or flexible transmission within the uplink transmission time period. In this case, the CSI fed back by the terminal may be determined based on the reference signal received on the frequency domain resource for downlink transmission.

[0230] The above, in combination with specific embodiments, illustrates the specific implementation of determining the first set based on the uplink and downlink time slot configuration of the terminal and TRP. In other embodiments, the terminal may also determine the reported CSI or the associated first set based on other information.

[0231] In some embodiments, the first information may also include the terminal's visible area information, and the terminal may send the second information based on the terminal's visible area information. The visible area information of the terminal may refer to the terminal's visible area information for each subarray of a large antenna array of a network-side device. Optionally, the terminal's visible area information may be indicated by the network-side device, for example, via downlink signaling. Alternatively, the reference signal may be measured and determined based on a first threshold configured by the network-side device. The first threshold may be a signal quality threshold for the reference signal.

[0232] Optionally, the signal quality threshold may include but is not limited to one of the following indications:

[0233] Reference Signal Receiving Power (RSRP) threshold, Reference Signal Receiving Quality (RSRQ) threshold, Signal to Interference plus Noise Ratio (SINR) threshold, Received Signal Strength Indication (RSSI) threshold.

[0234] It should be noted that as the scale of the antenna array on the network side continues to increase, most of the energy sent by the terminal in the near-field area is received by a part of the antenna subarray. The subarray set where these signal energies are concentrated is considered to be the visible area of ​​the terminal.

[0235] For example, the large antenna array of the network-side device is divided into four subarrays, each of which sends one CSI-RS. For example, subarray #1, subarray #2, subarray #3, and subarray #4 correspond to CSI-RS #1, CSI-RS #2, CSI-RS #3, and CSI-RS #4, respectively. The network-side device configures the terminal's CSI reporting to be associated with the CSI-RS set {CSI-RS #1, CSI-RS #2, CSI-RS #3, and CSI-RS #4}.

[0236] In some embodiments, the network-side device may indicate the terminal's visible area information to the terminal via a bitmap. For example, the network-side device sends fourth indication information to the terminal, where the fourth indication information includes multiple bits corresponding to multiple subarrays of the network-side device, and the value of each bit indicates whether the corresponding subarray belongs to the terminal's visible area. For example, if the visible area indicated for UE1 is 1110, it means that UE1 is associated with subarray #1, subarray #2, and subarray #3, that is, the visible area of ​​UE1 includes subarray #1, subarray #2, and subarray #3; if the visible area indicated for UE2 is 0101, it means that UE2 is associated with subarray #2 and subarray #4, that is, the visible area of ​​UE2 includes subarray #2 and subarray #4; if the visible area indicated for UE3 is 1100, it means that UE3 is associated with subarray #1 and subarray #2, that is, the visible area of ​​UE3 includes subarray #1 and subarray #2. Then, each UE can feedback the CSI of the reference signal associated with the corresponding subarray based on the visible area information of the UE. For example, UE1 feedbacks the first CSI corresponding to the CSI-RS set {#1, #2, #3}; UE2 feedbacks the second CSI corresponding to the CSI-RS set {#2, #4}; and UE3 feedbacks the third CSI corresponding to the CSI-RS set {#1, #2}.

[0237] Using this CSI reporting method, in multi-user (MU) scenarios with large antenna arrays, the network device can indicate a single set of identical reference signal resource configurations to multiple terminals. Each terminal then determines the subarray / CSI-RS set corresponding to its reported CSI based on its visible area information. The network device then obtains the CSI corresponding to each terminal's visible area. This helps reduce the network's overhead in reference signal resource configuration.

[0238] In some embodiments, the network side device may configure K groups of sets (or K groups of measurement assumptions) for the terminal, where each group of sets may include at least one reference signal set or TRP set, for example, the kth group of sets includes N k Reference signal resource sets or N k The terminal can select M from the kth set of the K sets. k A reference signal resource set or M k TRP sets, get M k target set, where K≥0, k≤K, N k Greater than 0, 0≤M k ≤N k Then report the CSI corresponding to each target set and the target set associated with the CSI.

[0239] It should be noted that the TRP sets or reference signal resource sets included in any two sets in the K sets may partially overlap, or may not overlap at all.

[0240] In some embodiments, the K groups can be configured individually or through reference signal resource configuration. For example, the K groups can be included in the reference signal resource configuration. In this way, the network device only needs to indicate one set of reference signal resource configurations, indicating the K groups. The terminal only needs to select some or all of the groups in each set and report the corresponding CSI. This helps reduce the network device's overhead in configuring CSI reports.

[0241] In some embodiments, the K group sets may be determined by the network side device according to the uplink and downlink time slot configuration of the terminal and the uplink and downlink time slot configuration of the TRP. For example, the K group sets may correspond to the K target time periods of the terminal, and each group set may include all TRP sets or associated reference signal resource sets that support downlink transmission within the corresponding target time period, that is, all first sets within the target time period. In this way, the network side device only needs to indicate the K group sets through a set of reference signal resource configurations, and the terminal does not need to determine the first set within each target time period based on the uplink and downlink time slot configuration of the terminal and the uplink and downlink time slot configuration of the TRP. It only needs to select part or all of the sets in each group set, and then report the corresponding CSI. Optionally, the set corresponding to the CSI may also be reported. For example, when reporting the CSI corresponding to all sets, the set corresponding to the CSI may not be reported (in this case, the reported CSI may be arranged in a preset order to ensure that the terminal and the network-side device have a consistent understanding of the set associated with the CSI). Alternatively, when reporting the CSI corresponding to some sets, the terminal may report the set corresponding to the CSI so that the network-side device knows to which set the CSI reported by the terminal is associated. Optionally, in this case, the network-side device may not indicate the uplink and downlink time slot configuration of the TRP to the terminal.

[0242] In some embodiments, when M k >1, the terminal can select multiple reference signal resource sets or TRP sets in each set and feed back the corresponding CSI. Optionally, the feedback order of the CSI corresponding to the multiple reference signal resource sets or TRP sets in each set can be indicated by the network side device, or it can also be predefined. For example, it can be sorted according to the performance of the CSI, such as arranging them in order from good to bad CSI performance, or it can also be arranged in the order of the associated reference signal resource index (or, measurement hypothesis index), such as arranging them in order from small to large according to the reference signal index (or, measurement hypothesis index).

[0243] Optionally, the reference signal resource set or TRP set (or measurement hypothesis) associated with the CSI reported by the terminal can be indicated by bit mapping, or different values ​​of the indication information can be used to indicate that the CSI is associated with different reference signal resource sets or TRP sets.

[0244] Taking the scenario in Figure 4 as an example, the network side device can configure two groups of TRP sets for the terminal. The first group of TRP sets includes {TRP1, TRP2, TRP3}, {TRP1, TRP2}, {TRP1, TRP3}, {TRP2, TRP3}, {TRP3}, {TRP2}, {TRP1}, a total of 7 TRP sets, corresponding to the first downlink time period (slot1 and slot2), and the second group of TRP sets includes {TRP1, TRP3}, {TRP3}, {TRP1}, a total of 3 TRP sets, corresponding to the second downlink time period (slot3), and instructs the terminal to select one TRP set in each group of TRP sets to feedback the corresponding CSI, as well as the correspondence between the CSI and the TRP set. For example, the terminal feeds back the first CSI and the second CSI, where the first CSI is associated with {TRP1, TRP2, TRP3} in the first group of TRP sets. If a bitmap is used for indication, the terminal can indicate 1-1000000, where 1 indicates that the first CSI is associated with the first group of TRP sets, and 1000000 indicates that the first CSI is associated with the first TRP set in the first group of TRP sets. The second CSI is associated with {TRP3} in the second group of TRP sets. If a bitmap is used for indication, the terminal can indicate 2-010, where 2 indicates that the second CSI is associated with the second group of TRP sets, and 010 indicates that the second CSI is associated with the second TRP set in the second group of TRP sets. Optionally, the terminal can also use a binary method to indicate which set in each set the CSI is associated with.

[0245] In summary, in an embodiment of the present application, the network side device only needs to indicate a set of reference signal resource configurations. The terminal can periodically or dynamically adjust the reference signal resource set or TRP set of the reported CSI based on the first information, and further report the CSI corresponding to the reference signal resource set or TRP set. The network side device can obtain the CSI corresponding to all possible TRP sets or reference signal resource sets that support downlink transmission, which is beneficial to reducing the reference signal resource configuration overhead of the network side device.

[0246] The above text, in combination with Figures 3 to 5, describes in detail the method embodiment of the present application. The following text, in combination with Figures 6 to 10, describes in detail the device embodiment of the present application. It should be understood that the device embodiment and the method embodiment correspond to each other, and similar descriptions can refer to the method embodiment.

[0247] The method for reporting channel state information (CSI) provided in the embodiment of the present application may be performed by a wireless communication device. The embodiment of the present application takes the method for reporting channel state information (CSI) performed by a wireless communication device as an example to illustrate the wireless communication device provided in the embodiment of the present application.

[0248] FIG6 shows a schematic block diagram of a communication device 600 according to an embodiment of the present application. As shown in FIG6 , the device 600 includes:

[0249] The processing unit 610 is configured to obtain first information;

[0250] The communication unit 620 is configured to send second information to the network side device according to the first information, wherein the second information includes at least one CSI, and each CSI in the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP;

[0251] The first information includes at least one of the following:

[0252] Uplink and downlink time slot configuration of the terminal;

[0253] TRP uplink and downlink timeslot configuration;

[0254] Uplink and downlink time slot configuration associated with reference signal resources;

[0255] Required reference signal resources;

[0256] Optional reference signal resources;

[0257] Required TRP;

[0258] Optional TRP;

[0259] Unavailable reference signal resources;

[0260] The port restriction information of the reference signal resource is used to indicate whether the port is closed.

[0261] In some embodiments, the communication unit 620 is further configured to:

[0262] The first information is received from the network-side device.

[0263] In some embodiments, the second information also includes third information, and the third information is used to indicate a target set associated with each CSI in the at least one CSI, wherein the target set includes a target reference signal resource set or a target TRP set, and wherein each CSI is determined based on the associated target set.

[0264] In some embodiments, the processing unit 610 is further configured to:

[0265] Acquire fourth information, where the fourth information is used to indicate a candidate set associated with the CSI, where the candidate set includes a candidate reference signal resource set or a candidate TRP set;

[0266] The target set is determined in the candidate set according to the first information.

[0267] In some embodiments, the communication unit 620 is further configured to:

[0268] The fourth information is received from the network side device.

[0269] In some embodiments, the first information includes the uplink and downlink time slot configurations of the terminal and the uplink and downlink time slot configurations of multiple TRPs, and the processing unit 610 is further configured to:

[0270] Determining at least one target time period of the terminal according to the uplink and downlink time slot configuration of the terminal, wherein the target time period is a time period in which the terminal supports downlink transmission;

[0271] Determine, according to the uplink and downlink time slot configurations of the multiple TRPs in each target time period, a first set in the candidate set, where the first set includes a TRP set supporting downlink transmission in the target time period or a reference signal resource set associated with the TRP set;

[0272] The target set is determined according to the first set.

[0273] In some embodiments, the processing unit 610 is further configured to:

[0274] determining the first set as the target set; or

[0275] Some reference signal resources or some TRPs are selected from the first set to form the target set.

[0276] In some embodiments, when the target set includes all reference signal resources or TRPs in the first set, the third information includes indication information of the first set associated with each CSI;

[0277] In the case where the target set includes some reference signal resources or TRPs in the first set, the third information includes indication information of the first set corresponding to each CSI-associated target set and first indication information, and the first indication information is used to indicate the reference signal resources or TRPs selected by the terminal in the first set to constitute the target set.

[0278] In some embodiments, the length of the first indication information is determined according to the number of reference signal resources or TRPs included in the first set.

[0279] In some embodiments, the processing unit 610 is further configured to:

[0280] Get K sets, where the kth set in the K sets includes N k sets, where the N k The sets are reference signal resource sets or TRP sets, where K>0, N k >0, 1≤k≤K;

[0281] Select M from the kth set in the K sets k sets, we get M k The target set, where 0≤M k ≤N k .

[0282] In some embodiments, the processing unit 610 is further configured to:

[0283] The terminal performs measurement based on each set in the kth set to obtain a measurement result corresponding to each set;

[0284] According to the measurement results corresponding to each set, M is selected in the kth set. k sets, we get M k a set of said targets.

[0285] In some embodiments, the communication unit 620 is further configured to:

[0286] A reference signal resource configuration is received, wherein the reference signal resource configuration includes the K group set.

[0287] In some embodiments, the communication unit 620 is further configured to:

[0288] Within the validity period of the first information, the terminal sends second information to the network side device according to the first information.

[0289] In some embodiments, the communication unit 620 is further configured to:

[0290] When the validity period of the first information expires, sending a first message to the network side device, where the first message is used to request an update of the first information;

[0291] A second message sent by the network-side device is received, where the second message includes the updated first information.

[0292] In some embodiments, the communication unit 620 is further configured to:

[0293] Second indication information is received from the network side device, where the second indication information is used to indicate a valid time of the first information.

[0294] In some embodiments, the second indication information is included in the first information.

[0295] In some embodiments, the processing unit 610 is further configured to:

[0296] Get the reference signal resource configuration.

[0297] In some embodiments, the communication unit 620 is further configured to:

[0298] The second information is sent to the network side device according to the reference signal resource configuration and the first information.

[0299] In some embodiments, the communication unit 620 is further configured to:

[0300] receiving downlink signaling, where the downlink signaling includes at least one of the updated first information and an updated reference signal resource configuration;

[0301] The processing unit 610 is further configured to update at least one of the first information and the reference signal resource configuration according to the downlink signaling.

[0302] In some embodiments, the downlink signaling is sent by the network side device based on the request of the terminal, or is sent when the uplink and downlink time slot configuration of the TRP changes, or is sent when the connection relationship between the terminal and the TRP changes, or is sent when the reference signal resource configuration changes.

[0303] In some embodiments, the communication unit 620 is further configured to:

[0304] Send third indication information to the network side device, where the third indication information is used to indicate whether the first information is successfully received.

[0305] In some embodiments, the third indication information is included in the second information.

[0306] In some embodiments, the communication unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip. The processing unit may be one or more processors.

[0307] It should be understood that the communication device 600 according to the embodiment of the present application may correspond to the terminal in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the communication device 600 are respectively for realizing the process executed by the terminal in the method embodiment shown in Figures 3 to 5 and achieving the same technical effect. To avoid repetition, they will not be repeated here.

[0308] FIG7 shows a schematic block diagram of a communication device 700 according to an embodiment of the present application. As shown in FIG7 , the device 700 includes:

[0309] The sending unit 710 is configured to send first information to a terminal;

[0310] The receiving unit 720 is configured to receive second information from the terminal according to the first information, wherein the second information includes at least one CSI, and each CSI of the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP;

[0311] The first information includes at least one of the following:

[0312] Uplink and downlink time slot configuration of the terminal;

[0313] TRP uplink and downlink timeslot configuration;

[0314] Uplink and downlink time slot configuration associated with reference signal resources;

[0315] Required reference signal resources;

[0316] Optional reference signal resources;

[0317] Required TRP;

[0318] Optional TRP;

[0319] Unavailable reference signal resources;

[0320] The port restriction information of the reference signal resource is used to indicate whether the port is closed.

[0321] In some embodiments, the second information also includes third information, and the third information is used to indicate a target set associated with each CSI in the at least one CSI, wherein the target set includes a target reference signal resource set or a target TRP set or a target reference signal resource or a target TRP, and wherein each CSI is determined based on the associated target set.

[0322] In some embodiments, the third information includes indication information of the first set of each CSI association;

[0323] The third information includes indication information of a first set corresponding to the target set associated with each CSI and first indication information, where the first indication information is used to indicate the reference signal resources or TRPs selected by the terminal from the first set to constitute the target set;

[0324] The first set includes a TRP set that supports downlink transmission within a target time period of the terminal or a reference signal resource set associated with the TRP set, and the target time period is a time period in which the terminal supports downlink transmission.

[0325] In some embodiments, the sending unit 710 is further configured to:

[0326] Fourth information is sent to the terminal, where the fourth information is used to indicate a candidate set associated with the CSI, where the candidate set includes a candidate reference signal resource set or a candidate TRP set.

[0327] In some embodiments, the communication device 700 further includes:

[0328] A processing unit is used to determine a target set in a candidate set based on the first information, wherein the candidate set includes a candidate reference signal resource set or a candidate TRP set, and each CSI in the at least one CSI is associated with a target set.

[0329] In some embodiments, the sending unit 710 is further configured to:

[0330] The network side device indicates K groups to the terminal, wherein the kth group in the K groups includes N k sets, where the N k The sets are reference signal resource sets or TRP sets, where K>0, N k >0,1≤k≤K。

[0331] In some embodiments, the sending unit 710 is further configured to:

[0332] Sending a reference signal resource configuration to the terminal, wherein the reference signal resource configuration includes the K group set.

[0333] In some embodiments, the sending unit 710 is further configured to:

[0334] Second indication information is sent to the terminal, where the second indication information is used to indicate a valid time of the first information.

[0335] In some embodiments, the second indication information is included in the first information.

[0336] In some embodiments, the receiving unit 720 is further configured to:

[0337] When the validity period of the first information expires, receiving a first message from the terminal, where the first message is used to request updating of the first information;

[0338] In some embodiments, the sending unit 710 is further configured to:

[0339] A second message is sent to the terminal, where the second message includes the updated first information.

[0340] In some embodiments, the sending unit 710 is further configured to:

[0341] Sending a reference signal resource configuration to the terminal.

[0342] In some embodiments, the sending unit 710 is further configured to:

[0343] Sending downlink signaling to the terminal, where the downlink signaling includes at least one of the updated first information and the updated reference signal resource configuration.

[0344] In some embodiments, the downlink signaling is sent by the network side device based on the request of the terminal, or is sent when the uplink and downlink time slot configuration of the TRP changes, or is sent when the connection relationship between the terminal and the TRP changes, or is sent when the reference signal resource configuration changes.

[0345] In some embodiments, the second indication information is included in the first information.

[0346] In some embodiments, the receiving unit 720 is further configured to:

[0347] Third indication information is received from the terminal, where the third indication information is used to indicate whether the terminal successfully receives the first information.

[0348] In some embodiments, the third indication information is included in the second information.

[0349] In some embodiments, the second information is included in a CSI report, or the second information is a CSI report.

[0350] In some embodiments, the sending unit and the receiving unit may be a communication interface or a transceiver, or an input / output interface of a communication chip or a system on chip.

[0351] It should be understood that the communication device 700 according to the embodiment of the present application may correspond to the network side device in the method embodiment of the present application, and the above-mentioned and other operations and / or functions of each unit in the communication device 700 are respectively for realizing the process executed by the network side device in the method embodiment shown in Figures 3 to 5 and achieving the same technical effect. To avoid repetition, they will not be repeated here.

[0352] In some embodiments, the apparatus 600 and apparatus 700 in the embodiments of the present application may be electronic devices, such as electronic devices with an operating system, or components in electronic devices, such as integrated circuits or chips. The electronic device may be a terminal, or may be other devices other than a terminal. For example, the terminal may include but is not limited to the types of terminal 11 listed above, and other devices may be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0353] As shown in Figure 8, an embodiment of the present application further provides a communication device 800, including a processor 801 and a memory 802. The memory 802 stores a program or instruction that can be run on the processor 801. For example, when the communication device 800 is a terminal, the program or instruction is executed by the processor 801 to implement the steps performed by the terminal in the above-mentioned embodiment of the method for reporting channel state information CSI, and can achieve the same technical effect. When the communication device 800 is a network-side device, the program or instruction is executed by the processor 801 to implement the various steps performed by the network-side device in the above-mentioned embodiment of the method for reporting channel state information CSI, and can achieve the same technical effect. To avoid repetition, they are not repeated here.

[0354] 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 in the method embodiments shown in Figures 3 to 5. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, Figure 9 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0355] The terminal 900 includes but is not limited to: a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 908, a memory 909 and at least some of the components of the processor 910.

[0356] Those skilled in the art will appreciate that the terminal 900 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 910 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG9 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.

[0357] It should be understood that in an embodiment of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042, and the graphics processor 9041 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 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. Other input devices 9072 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 an operating stick, which will not be repeated here.

[0358] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 901 may transmit the data to the processor 910 for processing. Furthermore, the RF unit 901 may send uplink data to the network-side device. Typically, the RF unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0359] The memory 909 can be used to store software programs or instructions and various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein 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.). In addition, the memory 909 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. 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 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0360] Processor 910 may include one or more processing units. Optionally, processor 910 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 910.

[0361] The processor 910 is configured to obtain first information;

[0362] The radio frequency unit 901 is configured to send second information to a network-side device based on the first information, where the second information includes at least one CSI, and each CSI in the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP;

[0363] The first information includes at least one of the following:

[0364] Uplink and downlink time slot configuration of the terminal;

[0365] TRP uplink and downlink timeslot configuration;

[0366] Uplink and downlink time slot configuration associated with reference signal resources;

[0367] Required reference signal resources;

[0368] Optional reference signal resources;

[0369] Required TRP;

[0370] Optional TRP;

[0371] Unavailable reference signal resources;

[0372] The port restriction information of the reference signal resource is used to indicate whether the port is closed. It is understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the terminal in the method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0373] 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 3 to 5. This network-side device embodiment corresponds to the aforementioned network-side device-side 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.

[0374] Specifically, an embodiment of the present application also provides a network-side device. As shown in Figure 10, the network-side device 1000 includes: an antenna 1001, a radio frequency device 1002, a baseband device 1003, a processor 1004, and a memory 1005. Antenna 1001 is connected to radio frequency device 1002. In the uplink direction, radio frequency device 1002 receives information via antenna 1001 and sends the received information to baseband device 1003 for processing. In the downlink direction, baseband device 1003 processes the information to be transmitted and sends it to radio frequency device 1002. Radio frequency device 1002 processes the received information and sends it through antenna 1001.

[0375] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 1003 , which includes a baseband processor.

[0376] The baseband device 1003 may, for example, include at least one baseband board, on which multiple chips are arranged, as shown in Figure 10, one of which is, for example, a baseband processor, which is connected to the memory 1005 through a bus interface to call the program in the memory 1005 and execute the network device operations shown in the above method embodiment.

[0377] The network side device may further include a network interface 1006, which is, for example, a Common Public Radio Interface (CPRI).

[0378] In some embodiments, the network side device 1000 of the embodiment of the present application also includes: instructions or programs stored on the memory 1005 and can be run on the processor 1004. The processor 1004 calls the instructions or programs in the memory 1005 to execute the steps performed by the network side device in the method embodiments shown in Figures 3 to 5, and achieves the same technical effect. To avoid repetition, they will not be repeated here.

[0379] The processors mentioned in the embodiments of the present application may include general-purpose processors, special-purpose processors, etc., such as a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligence (AI) processor, a graphics processing unit (GPU), an application-specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA), or other programmable logic devices, gate circuits, transistors, discrete hardware components, etc.

[0380] 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 above-mentioned channel state information CSI reporting method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0381] The processor is the processor in the terminal or network-side device described in the above embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), 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.

[0382] 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 above-mentioned channel state information CSI reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0383] 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.

[0384] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the above-mentioned channel state information CSI reporting method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0385] An embodiment of the present application also provides a communication system, including: a terminal and a network-side device, wherein the terminal can be used to execute the steps of the channel state information CSI reporting method as described above, and the network-side device can be used to execute the steps of the channel state information CSI reporting method as described above.

[0386] 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.

[0387] 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.

[0388] 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 reporting channel state information (CSI), wherein: include: The terminal obtains the first information; Sending second information to a network-side device according to the first information, wherein the second information includes at least one CSI, and each CSI in the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP; The first information includes at least one of the following: Uplink and downlink time slot configuration of the terminal; TRP uplink and downlink timeslot configuration; Uplink and downlink time slot configuration associated with reference signal resources; Required reference signal resources; Optional reference signal resources; Required TRP; Optional TRP; Unavailable reference signal resources; The port restriction information of the reference signal resource is used to indicate whether the port is closed.

2. The method according to claim 1, wherein The terminal obtains first information, including: The terminal receives the first information from the network side device.

3. The method according to claim 1 or 2, wherein: The second information also includes third information, and the third information is used to indicate the target set associated with each CSI in the at least one CSI, wherein the target set includes a target reference signal resource set or a target TRP set, and wherein each CSI is determined based on the associated target set.

4. The method according to claim 3, wherein: The method further comprises: The terminal obtains fourth information, where the fourth information is used to indicate a candidate set associated with the CSI, where the candidate set includes a candidate reference signal resource set or a candidate TRP set; The terminal determines the target set from the candidate set according to the first information.

5. The method according to claim 4, wherein The terminal obtains fourth information, including: The terminal receives the fourth information from the network side device.

6. The method according to claim 4 or 5, wherein: The first information includes the uplink and downlink time slot configuration of the terminal and the uplink and downlink time slot configurations of multiple TRPs, and the terminal determines the target set from the candidate set according to the first information, including: Determining at least one target time period of the terminal according to the uplink and downlink time slot configuration of the terminal, wherein the target time period is a time period in which the terminal supports downlink transmission; Determine, according to the uplink and downlink time slot configurations of the multiple TRPs in each target time period, a first set in the candidate set, where the first set includes a TRP set supporting downlink transmission in the target time period or a reference signal resource set associated with the TRP set; The target set is determined according to the first set.

7. The method according to claim 6, wherein: The determining the target set according to the first set includes: determining the first set as the target set; or Some reference signal resources or some TRPs are selected from the first set to form the target set.

8. The method according to claim 7, wherein: In a case where the target set includes all reference signal resources or TRPs in the first set, the third information includes indication information of the first set associated with each CSI; In the case where the target set includes some reference signal resources or TRPs in the first set, the third information includes indication information of the first set corresponding to each CSI-associated target set and first indication information, and the first indication information is used to indicate the reference signal resources or TRPs selected by the terminal in the first set to constitute the target set.

9. The method according to claim 8, wherein The length of the first indication information is determined according to the number of reference signal resources or TRPs included in the first set.

10. The method according to claim 4, wherein: The method further comprises: The terminal obtains K sets, wherein a kth set in the K sets includes Nk sets, wherein the Nk sets are reference signal resource sets or TRP sets, wherein K>0, Nk>0, and 1≤k≤K; The terminal selects Mk sets from the kth set among the K sets to obtain Mk target sets, where 0≤Mk≤Nk.

11. The method according to claim 10, wherein: The terminal selects Mk sets from the kth set in the K sets to obtain Mk target sets, including: The terminal performs measurement based on each set in the kth set to obtain a measurement result corresponding to each set; According to the measurement results corresponding to each set, Mk sets are selected from the k-th group of sets to obtain Mk target sets.

12. The method according to claim 10 or 11, wherein: The terminal obtains the K group set, including: The terminal receives a reference signal resource configuration, where the reference signal resource configuration includes the K group set.

13. The method according to any one of claims 1 to 12, wherein The sending second information to the network side device according to the first information includes: Within the validity period of the first information, the terminal sends second information to the network side device according to the first information.

14. The method according to claim 13, wherein The method further comprises: When the validity period of the first information expires, the terminal sends a first message to the network side device, where the first message is used to request an update of the first information; The terminal receives a second message sent by the network-side device, where the second message includes updated first information.

15. The method according to claim 13 or 14, wherein: The method further comprises: The terminal receives second indication information from the network side device, where the second indication information is used to indicate a valid time of the first information.

16. The method according to claim 15, wherein The second indication information is included in the first information.

17. The method according to any one of claims 1 to 16, wherein: The method further comprises: The terminal obtains reference signal resource configuration; The terminal sending second information to the network side device according to the first information includes: The second information is sent to the network side device according to the reference signal resource configuration and the first information.

18. The method according to claim 17, wherein The method further comprises: The terminal receives downlink signaling, where the downlink signaling includes at least one of the updated first information and the updated reference signal resource configuration; The terminal updates at least one of the first information and reference signal resource configuration according to the downlink signaling.

19. The method according to claim 18, wherein The downlink signaling is sent by the network side device based on the request of the terminal, or is sent when the uplink and downlink time slot configuration of the TRP changes, or is sent when the connection relationship between the terminal and the TRP changes, or is sent when the reference signal resource configuration changes.

20. The method according to any one of claims 1 to 19, wherein The method further comprises: The terminal sends third indication information to the network side device, where the third indication information is used to indicate whether the first information is successfully received.

21. The method according to claim 20, wherein The third indication information is included in the second information.

22. The method according to any one of claims 1 to 21, wherein The second information is included in a CSI report, or the second information is a CSI report.

23. A method for reporting channel state information (CSI), wherein: include: The network side device sends first information to the terminal; Receiving second information from the terminal according to the first information, wherein the second information includes at least one CSI, each of the at least one CSI being associated with at least one reference signal resource or at least one transmission reception point (TRP); The first information includes at least one of the following: Uplink and downlink time slot configuration of the terminal; TRP uplink and downlink timeslot configuration; Uplink and downlink time slot configuration associated with reference signal resources; Required reference signal resources; Optional reference signal resources; Required TRP; Optional TRP; Unavailable reference signal resources; The port restriction information of the reference signal resource is used to indicate whether the port is closed.

24. The method according to claim 23, wherein The second information also includes third information, and the third information is used to indicate the target set associated with each CSI in the at least one CSI, wherein the target set includes a target reference signal resource set or a target TRP set or a target reference signal resource or a target TRP, and wherein each CSI is determined based on the associated target set.

25. The method according to claim 24, wherein The third information includes indication information of the first set of each CSI association; The third information includes indication information of a first set corresponding to the target set associated with each CSI and first indication information, where the first indication information is used to indicate the reference signal resources or TRPs selected by the terminal from the first set to constitute the target set; The first set includes a TRP set that supports downlink transmission within a target time period of the terminal or a reference signal resource set associated with the TRP set, and the target time period is a time period in which the terminal supports downlink transmission.

26. The method according to any one of claims 23 to 25, wherein: The method further comprises: The network side device sends fourth information to the terminal, where the fourth information is used to indicate a candidate set associated with the CSI, where the candidate set includes a candidate reference signal resource set or a candidate TRP set.

27. The method according to claim 26, wherein The method further comprises: The network-side device determines a target set in a candidate set based on the first information, wherein the candidate set includes a candidate reference signal resource set or a candidate TRP set, and each CSI in the at least one CSI is associated with a target set.

28. The method according to any one of claims 23 to 26, wherein The method further comprises: The network side device indicates K group sets to the terminal, wherein the kth group set in the K group sets includes Nk sets, wherein the Nk sets are reference signal resource sets or TRP sets, wherein K>0, Nk>0, 1≤k≤K.

29. The method according to claim 28, wherein The network side device indicates the K group set to the terminal, including: The network-side device sends a reference signal resource configuration to the terminal, wherein the reference signal resource configuration includes the K group set.

30. The method according to any one of claims 23 to 28, wherein The method further comprises: The network side device sends second indication information to the terminal, where the second indication information is used to indicate the validity period of the first information.

31. The method according to claim 30, wherein The second indication information is included in the first information.

32. The method according to claim 30 or 31, wherein The method further comprises: When the validity period of the first information expires, the network-side device receives a first message from the terminal, where the first message is used to request an update of the first information; The network-side device sends a second message to the terminal, where the second message includes the updated first information.

33. The method according to any one of claims 23 to 32, wherein: The method further comprises: The network side device sends a reference signal resource configuration to the terminal.

34. The method according to claim 33, wherein The method further comprises: The network-side device sends downlink signaling to the terminal, where the downlink signaling includes at least one of the updated first information and the updated reference signal resource configuration.

35. The method according to claim 34, wherein The downlink signaling is sent by the network side device based on the request of the terminal, or is sent when the uplink and downlink time slot configuration of the TRP changes, or is sent when the connection relationship between the terminal and the TRP changes, or is sent when the reference signal resource configuration changes.

36. The method according to any one of claims 23 to 35, wherein The method further comprises: The network-side device receives third indication information from the terminal, where the third indication information is used to indicate whether the terminal successfully receives the first information.

37. The method according to claim 36, wherein The third indication information is included in the second information.

38. A communication device, wherein: include: a processing unit, configured to obtain first information; a communication unit, configured to send second information to a network-side device based on the first information, wherein the second information includes at least one CSI, and each CSI in the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP; The first information includes at least one of the following: Uplink and downlink time slot configuration of the communication device; TRP uplink and downlink timeslot configuration; Uplink and downlink time slot configuration associated with reference signal resources; Required reference signal resources; Optional reference signal resources; Required TRP; Optional TRP; Unavailable reference signal resources; The port restriction information of the reference signal resource is used to indicate whether the port is closed.

39. The communication device according to claim 38, wherein The second information also includes third information, and the third information is used to indicate the target set associated with each CSI in the at least one CSI, wherein the target set includes a target reference signal resource set or a target TRP set, and wherein each CSI is determined based on the associated target set.

40. The communication device according to claim 39, wherein The processing unit is further configured to: Acquire fourth information, where the fourth information is used to indicate a candidate set associated with the CSI, where the candidate set includes a candidate reference signal resource set or a candidate TRP set; The target set is determined in the candidate set according to the first information.

41. The communication device according to claim 40, wherein: The first information includes the uplink and downlink time slot configurations of the communication device and the uplink and downlink time slot configurations of multiple TRPs, and the processing unit is further configured to: Determining at least one target time period of the communication device according to the uplink and downlink time slot configurations of the communication device, wherein the target time period is a time period during which the communication device supports downlink transmission; Determine, according to the uplink and downlink time slot configurations of the multiple TRPs in each target time period, a first set in the candidate set, where the first set includes a TRP set supporting downlink transmission in the target time period or a reference signal resource set associated with the TRP set; The target set is determined according to the first set.

42. The communication device according to claim 41, wherein The processing unit is further configured to: determining the first set as the target set; or Selecting some reference signal resources or some TRPs from the first set to form the target set; Wherein, in a case where the target set includes all reference signal resources or TRPs in the first set, the third information includes indication information of the first set associated with each CSI; In the case where the target set includes some reference signal resources or TRPs in the first set, the third information includes indication information of the first set corresponding to each CSI-associated target set and first indication information, and the first indication information is used to indicate the reference signal resources or TRPs selected by the communication device in the first set to constitute the target set.

43. The communication device according to any one of claims 38 to 42, wherein: The communication unit is further configured to: Second indication information is received from the network side device, where the second indication information is used to indicate a valid time of the first information.

44. The communication device according to any one of claims 38 to 42, wherein: The communication unit is further configured to: receiving downlink signaling, where the downlink signaling includes at least one of the updated first information and an updated reference signal resource configuration; The processing unit is further configured to update at least one of the first information and reference signal resource configuration according to the downlink signaling.

45. The communication device according to any one of claims 38 to 44, wherein: The communication unit is further configured to: Send third indication information to the network side device, where the third indication information is used to indicate whether the first information is successfully received.

46. ​​A communication device, wherein: include: A sending unit, configured to send first information to a terminal; a receiving unit, configured to receive second information from the terminal according to the first information, wherein the second information includes at least one CSI, and each CSI of the at least one CSI is associated with at least one reference signal resource or at least one transmission reception point TRP; The first information includes at least one of the following: Uplink and downlink time slot configuration of the terminal; TRP uplink and downlink timeslot configuration; Uplink and downlink time slot configuration associated with reference signal resources; Required reference signal resources; Optional reference signal resources; Required TRP; Optional TRP; Unavailable reference signal resources; The port restriction information of the reference signal resource is used to indicate whether the port is closed.

47. The communication device according to claim 46, wherein The second information also includes third information, and the third information is used to indicate the target set associated with each CSI in the at least one CSI, wherein the target set includes a target reference signal resource set or a target TRP set or a target reference signal resource or a target TRP, and wherein each CSI is determined based on the associated target set.

48. The communication device according to claim 46 or 47, wherein: The sending unit is further configured to: Second indication information is sent to the terminal, where the second indication information is used to indicate a valid time of the first information.

49. The communication device according to claim 46 or 47, wherein: The sending unit is further configured to: Sending downlink signaling to the terminal, where the downlink signaling includes at least one of the updated first information and the updated reference signal resource configuration.

50. The communication device according to any one of claims 46 to 49, wherein: The receiving unit is further configured to: Third indication information is received from the terminal, where the third indication information is used to indicate whether the terminal successfully receives the first information.

51. A communication device, wherein: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 22 or the steps of the method according to any one of claims 23 to 37 are implemented.

52. A readable storage medium, wherein: The readable storage medium stores a program or instruction, and when the program or instruction is executed by a processor, the steps in the method according to any one of claims 1 to 22 or the steps in the method according to any one of claims 23 to 37 are implemented.

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