Reference signal resource indication method and communication device

Abstract

Provided are a reference signal resource indication method and a communication device, the method comprising: a terminal determining first indication information and second indication information, the first indication information and the second indication information being determined according to reference signals received on N reference signal resource groups, each reference signal resource group comprises one or more reference signal resources, the first indication information is used for indicating that the CSI prediction window comprises at least one sub-prediction window, and the second indication information is used for indicating at least one reference signal resource group set corresponding to the at least one sub-prediction window; each reference signal resource group set comprises at least one reference signal resource group in the N reference signal resource groups, and the prediction CSI of one sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to one sub-prediction window. And the terminal sends the first indication information and the second indication information. The reliability of terminal communication can be improved.

Description

Technical Field

[0001] The present application relates to the field of communications, and more specifically, to a reference signal resource indication method and a communication device. Background Art

[0002] In mobile communication systems, the application of massive multiple-input multiple-output (MIMO) technology plays a vital role in improving the spectrum efficiency of the system. When using MIMO technology, network equipment needs to precode data before sending it to the terminal. The precoding used by the network equipment needs to be determined based on the channel state information (CSI) fed back by the terminal. Accurate CSI feedback is an important factor affecting system performance.

[0003] The collaborative transmission (joint transmission, JT) of multiple transmission points to the terminal is a way to improve the data throughput of the terminal. The network equipment can determine the transmission point collaboration set for the terminal collaborative transmission data based on the CSI obtained by the terminal measuring the reference signals of multiple transmission points. However, the current CSI feedback of the terminal for collaborative transmission does not take into account the impact of channel changes caused by terminal mobility, and the reliability of the CSI feedback of the terminal for collaborative transmission needs to be improved. Summary of the invention

[0004] The embodiments of the present application provide a reference signal resource indication method and a communication device, which can improve the flexibility of a terminal in reporting a transmission point cooperation set, so that an access network node can configure a transmission point cooperation set that is compatible with a terminal mobility channel for the terminal to provide data transmission services for the terminal, thereby improving the reliability of terminal communication.

[0005] In a first aspect, an information transmission method is provided, which can be executed by a terminal or a module (such as a chip) configured in (or used for) a terminal. The following description is made by taking the terminal executing the method as an example.

[0006] The method includes: a terminal determines first indication information and second indication information, the first indication information and the second indication information are determined according to reference signals received on N reference signal resource groups, each of the N reference signal resource groups includes one or more reference signal resources, wherein the first indication information is used to indicate that a CSI prediction window includes at least one sub-prediction window, the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, each of the reference signal resource group sets includes at least one reference signal resource group in the N reference signal resource groups, and the predicted CSI of one sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the one sub-prediction window. The terminal sends the first indication information and the second indication information.

[0007] The N reference signal resource groups correspond to N transmission points.

[0008] According to the above scheme, the terminal determines whether the transmission point cooperation set changes within the CSI prediction window while considering its own movement, determines that the CSI prediction window contains one or more sub-prediction windows, and reports the transmission point cooperation set corresponding to each sub-prediction window to the access network node by indicating the reference signal resource group set corresponding to each sub-prediction window. The access network node can determine the sub-prediction windows contained in the CSI prediction window and the transmission point cooperation set corresponding to each sub-prediction window based on the information reported by the terminal. The flexibility of reporting the transmission point cooperation set is improved, so that the access network node can configure the transmission point cooperation set adapted to the terminal mobility to provide data transmission services for the terminal, which can improve the reliability of terminal communication.

[0009] In combination with the first aspect, in certain implementations of the first aspect, the first indication information indicates the time length of each sub-prediction window in the at least one sub-prediction window; or, the first indication information indicates the start time or end time of each sub-prediction window in the at least one sub-prediction window.

[0010] According to the above solution, the terminal can notify the access network node of the position of each sub-prediction window in the CSI prediction window by directly or indirectly indicating the time length, start time or end time of each sub-prediction window, so that the access network node can accurately obtain the position of the sub-prediction window in the CSI prediction window determined by the terminal.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the first indication information indicates that the CSI prediction window includes one sub-prediction window; or the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows.

[0012] When the first indication information indicates that the prediction window includes multiple sub-prediction windows, the first indication information also indicates the time length of each sub-prediction window in the multiple sub-prediction windows; or, the first indication information also indicates the start time or end time of each sub-prediction window in the multiple sub-prediction windows.

[0013] According to the above solution, the terminal may notify the CSI prediction window of one or more sub-prediction windows through the first indication information. And in the case where the CSI prediction window includes multiple sub-prediction windows, the terminal may also notify the access network node of the position of each sub-prediction window through the first indication information. This allows the access network node to determine the position of the sub-prediction window included in the CSI prediction window.

[0014] Exemplarily, the first indication information includes 1 bit, the 1 bit is a first value, indicating that the CSI prediction window includes a sub-prediction window; or, the 1 bit is a second value, indicating that the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows.

[0015] In combination with the first aspect, in certain implementations of the first aspect, the second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, and each of the bit sequences includes N bits corresponding to the N reference signal resource groups.

[0016] A bit in the bit sequence is used to indicate whether the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the bit, wherein the reference signal resource group set corresponding to the bit sequence is the reference signal resource group set corresponding to the sub-prediction window corresponding to the bit sequence.

[0017] According to the above scheme, the second indication information may include a bit sequence corresponding to each sub-prediction window, and the reference signal resource group included in the reference signal resource group set corresponding to the sub-prediction window is indicated by the bit sequence. The terminal and the access network node can reach a consensus that one bit in each bit sequence is used to indicate that the corresponding reference signal resource group set includes or does not include the reference signal resource group corresponding to the bit. The access network node can determine the reference signal resource group included in the reference signal resource group set corresponding to each sub-prediction window based on the second indication information, thereby determining the corresponding transmission point.

[0018] In an example of the implementation, a bit in the bit sequence is 1, indicating that the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the bit. A bit in the bit sequence is 0, indicating that the reference signal resource group set corresponding to the bit sequence does not include the reference signal resource group corresponding to the bit.

[0019] In this example, the number of time units N in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n is 4,n is the sum of the number of time units contained in the sub-prediction window of the corresponding reference signal resource group set containing the reference signal resource group n, 1≤n≤N, where N 4,n satisfy:

[0020]

[0021] Wherein, L is the number of sub-prediction windows included in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the lth sub-prediction window, X l is the number of time units contained in the l-th sub-prediction window, 1≤l≤L, and l is an integer.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, and each of the bit sequences includes N bits corresponding to the N reference signal resource groups.

[0023] A first sub-prediction window in the at least one sub-prediction window corresponds to a first bit sequence in the at least one bit sequence, and a bit in the first bit sequence is used to indicate whether a reference signal resource group set corresponding to the first sub-prediction window includes a reference signal resource group corresponding to the one bit;

[0024] The k-th sub-prediction window in the at least one sub-prediction window corresponds to a second bit sequence in the at least one bit sequence, and one bit in the second bit sequence is used to indicate whether an inclusion relationship between a reference signal resource group set corresponding to the k-th sub-prediction window and a reference signal resource group corresponding to the one bit is changed compared to an inclusion relationship between a reference signal resource group set corresponding to the reference sub-prediction window and a reference signal resource group corresponding to the one bit, and k is an integer greater than 1,

[0025] The reference sub-prediction window is the first sub-prediction window or the k-1th sub-prediction window.

[0026] According to the above scheme, the second indication information may include a bit sequence corresponding to each sub-prediction window, and a bit in the bit sequence corresponding to the first sub-prediction window may indicate the reference signal resource group included or not included in the reference signal resource group set corresponding to the first sub-prediction window. A bit in the bit sequence corresponding to other sub-prediction windows may indicate whether the inclusion relationship between the reference signal resource group set corresponding to the bit sequence and the reference signal resource group corresponding to the bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the reference sub-prediction window and the reference signal resource group corresponding to the bit. This allows the access network node to determine the reference signal resource group included in the reference signal resource group set corresponding to each sub-prediction window based on the second indication information, thereby determining the corresponding transmission point.

[0027] In an example of the implementation, one bit in the first bit sequence is 1, indicating that the reference signal resource group set corresponding to the first sub-prediction window includes the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the reference signal resource group set corresponding to the first sub-prediction window does not include the reference signal resource group corresponding to the one bit;

[0028] One bit in the second bit sequence is 1, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit remains unchanged compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit.

[0029] In this example, the number of time units N in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n is 4,n is the sum of the number of time units contained in the sub-prediction window of the corresponding reference signal resource group set containing the reference signal resource group n, 1≤n≤N, where N 4,n satisfy:

[0030]

[0031] Wherein, L is the number of sub-prediction windows included in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the first sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the kth sub-prediction window, X1 is the number of time units contained in the first sub-prediction window, and Xk is the number of time units contained in the k-th sub-prediction window, k is an integer greater than 1 and less than or equal to L, Represents a modulo-2 addition operation.

[0032] In a second aspect, an information transmission method is provided, which can be executed by an access network node or a module (such as a chip) configured in (or used for) an access network node. The following description is made by taking an access network node as an example.

[0033] The method includes: an access network node receives first indication information and second indication information, wherein the first indication information and the second indication information are determined based on reference signals received on N reference signal resource groups, each of the N reference signal resource groups includes one or more reference signal resources, wherein the first indication information is used to indicate that a CSI prediction window includes at least one sub-prediction window, and the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, each of the reference signal resource group sets includes at least one reference signal resource group in the N reference signal resource groups, and the predicted CSI of a sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the sub-prediction window. The access network node determines the predicted CSI corresponding to each time unit in the CSI prediction window based on the first indication information and the second indication information.

[0034] It should be understood that the first indication information and the indication method of the second indication information in the second aspect, as well as the beneficial effects of each characteristic response in the second aspect, can be referred to the description of the first aspect and will not be repeated here for the sake of brevity.

[0035] In a third aspect, a communication device is provided. In one design, the device may include a module corresponding to the method / operation / step / action described in the first aspect or any one of the embodiments of the first aspect. The module may be a hardware circuit, or software, or a combination of a hardware circuit and software. In one design, the device includes: a processing unit, configured to determine first indication information and second indication information, wherein the first indication information and the second indication information are determined based on reference signals received on N reference signal resource groups, wherein each of the N reference signal resource groups includes one or more reference signal resources, wherein the first indication information is used to indicate that the CSI prediction window includes at least one sub-prediction window, and the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, wherein each of the reference signal resource group sets includes at least one reference signal resource group in the N reference signal resource groups, and the predicted CSI of one sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the one sub-prediction window. A transceiver unit, configured to send the first indication information and the second indication information.

[0036] In a fourth aspect, a communication device is provided. In one design, the device may include a module corresponding to the method / operation / step / action described in the second aspect or any one of the embodiments of the second aspect. The module may be a hardware circuit, or software, or a combination of a hardware circuit and software. In one design, the device includes: a transceiver unit, configured to receive first indication information and second indication information, wherein the first indication information and the second indication information are determined based on reference signals received on N reference signal resource groups, wherein each of the N reference signal resource groups includes multiple reference signal resources, wherein the first indication information is used to indicate multiple sub-prediction windows included in a CSI prediction window, and the second indication information is used to indicate multiple reference signal resource group sets corresponding to the multiple sub-prediction windows, wherein each of the reference signal resource group sets includes at least one reference signal resource group in the N reference signal resource groups, and the predicted CSI of one of the multiple sub-prediction windows is determined based on the reference signal resource group set corresponding to the one sub-prediction window. A processing unit, configured to determine the predicted CSI corresponding to each time unit in the CSI prediction window according to the first indication information and the second indication information.

[0037] In a fifth aspect, a communication device is provided, comprising a processor. The processor can implement the method in the above-mentioned first aspect or second aspect and any possible implementation of the first aspect or second aspect. Optionally, the communication device also includes a memory, and the processor is coupled to the memory, and can be used to execute instructions in the memory to implement the above-mentioned first aspect or second aspect and any possible implementation of the first aspect or second aspect. Optionally, the communication device also includes a communication interface, and the processor is coupled to the communication interface. In an embodiment of the present application, the communication interface can be a transceiver, a pin, a circuit, a bus, a module or other type of communication interface, without limitation.

[0038] In one implementation, the communication device is a communication equipment (such as a terminal device or an access network device). When the communication device is a communication equipment, the communication interface may be a transceiver, or an input / output interface.

[0039] In another implementation, the communication device is a chip configured in a communication device. When the communication device is a chip configured in a communication device, the communication interface may be an input / output interface.

[0040] Optionally, the transceiver may be a transceiver circuit. Optionally, the input / output interface may be an input / output circuit.

[0041] In a sixth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in the first aspect or the second aspect and any possible implementation of the first aspect or the second aspect.

[0042] In the specific implementation process, the processor can be one or more chips, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation methods of the processor and various circuits.

[0043] In the seventh aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute the method in the above-mentioned first aspect or second aspect and any possible implementation manner of the first aspect or second aspect.

[0044] In an eighth aspect, a computer-readable storage medium is provided, which stores a computer program (also referred to as code, or instructions). When the computer-readable storage medium is run on a computer, the computer executes the method in the above-mentioned first aspect or second aspect and any possible implementation manner of the first aspect or second aspect.

[0045] In a ninth aspect, a communication system is provided, comprising at least one terminal as mentioned above and at least one access network node as mentioned above. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

[0047] Figure 2 is another schematic diagram of the communication system architecture provided by an embodiment of the present application;

[0048] Figure 3 is a schematic diagram of terminal mobility provided by an embodiment of the present application;

[0049] Figure 4 is a schematic flow chart of an information transmission method provided in an embodiment of the present application;

[0050] Figure 5 is a schematic block diagram of an example of a communication device provided in an embodiment of the present application;

[0051] Figure 6 It is a schematic structural diagram of another example of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0053] In the embodiment of the present application, " / " can indicate that the objects associated before and after are in an "or" relationship, for example, A / B can indicate A or B; "and / or" can be used to describe that there are three relationships between the associated objects, for example, A and / or B can indicate: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In order to facilitate the description of the technical solution of the embodiment of the present application, in the embodiment of the present application, the words "first" and "second" can be used to distinguish. The words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not necessarily limit the difference. In the embodiment of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or explanations, and any embodiment or design described as "exemplary" or "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or design. The use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way for easy understanding. In the embodiments of the present application, at least one (kind) can also be described as one (kind) or more (kinds), and more (kinds) can be two (kinds), three (kinds), four (kinds) or more (kinds), and the present application does not impose any limitation.

[0054] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: long term evolution (LTE) system, fifth generation (5G) communication system, wireless fidelity (WiFi) system, and the communication method provided by the present application can also be applied to the sixth generation (6G) communication system and other communication systems evolved after 5G, future communication systems or other communication systems. The present application does not limit this.

[0055] Figure 1 FIG. 1 is a schematic diagram showing a possible, non-limiting system. Figure 1 As shown, the communication system 10 includes a radio access network (RAN) 100 and a core network (CN) 200. The RAN 100 includes at least one RAN node (e.g. Figure 1 110a and 110b, collectively referred to as 110) and at least one terminal (such as Figure 1 RAN 100 may also include other RAN nodes, such as wireless relay equipment and / or wireless backhaul equipment ( Figure 1The terminal 120 is connected to the RAN node 110 in a wireless manner. The access network node (or RAN node) 110 is connected to the core network 200 in a wireless or wired manner. The core network device in the core network 200 and the access network node 110 in the RAN 100 can be different physical devices, or the same physical device that integrates the core network logical function and the wireless access network logical function.

[0056] RAN 100 may be a cellular system related to the third generation partnership project (3GPP), for example, a 4G, 5G mobile communication system, or a future evolution system (for example, a 6G mobile communication system). RAN 100 may also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (cloud radio access network, CRAN), or a wireless fidelity (wireless fidelity, WiFi) system. RAN 100 may also be a communication system that integrates two or more of the above systems.

[0057] The access network node 110, which may also be sometimes referred to as an access network device, a RAN entity or an access node, etc., constitutes a part of the communication system to help the terminal achieve wireless access. The multiple access network nodes 110 in the communication system 10 may be nodes of the same type or nodes of different types. In some scenarios, the roles of the access network node 110 and the terminal 120 are relative, for example, Figure 1 The network element 120i may be a helicopter or a drone, which may be configured as a mobile base station. For the terminals 120j that access the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The access network node 110 and the terminal 120 are sometimes referred to as communication devices, for example Figure 1 The network elements 110a and 110b may be understood as communication devices having base station functions, and the network elements 120a-120j may be understood as communication devices having terminal functions.

[0058] In one possible scenario, the access network node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. The access network node may be a macro base station (e.g. Figure 1 110a in), micro base stations or indoor stations (such as Figure 1 110b in the example), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the access network node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). All or part of the functions of the access network node in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The access network node in the present application may also be a logical node, a logical module or software that can implement all or part of the functions of the access network node.

[0059] In another possible scenario, multiple access network nodes collaborate to assist the terminal in achieving wireless access, and different access network nodes respectively implement part of the functions of the base station. For example, the access network node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH).

[0060] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are described as examples in this application. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0061] The terminal may also be referred to as terminal device, user equipment (UE), mobile station, mobile terminal, etc. The terminal can be widely used in various scenarios for communication. The scenario includes, for example, but is not limited to at least one of the following scenarios: enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), massive machine-type communications (mMTC), D2D, V2X, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearable, smart transportation, perception terminal, communication and perception integrated terminal, or smart city, etc. The terminal may be a mobile phone (such as Figure 1 120a, 120j and 120e in the above), tablet computers, computers with wireless transceiver functions (such as Figure 1 120g), customer-premises equipment (CPE), smart point of sale (POS), wearable devices, vehicles (such as Figure 1 120b), drones, helicopters, airplanes (such as Figure 1 120i in ), ships, robots, robotic arms, sensors, perceptions, or smart home devices (such as Figure 1 120h in) etc.

[0062] Figure 2 is another system diagram applicable to the embodiment of the present application. The system may include multiple transmission points, such as Figure 2 The transmission points 211, 212 and 213 shown in the figure may be transmission and reception points (TRP) with information transmission and reception functions. The system may also include at least one terminal, such as Figure 2 Terminal 220 is shown.

[0063] like Figure 2 The multiple TRPs shown can communicate with the terminal 220 in a manner of multiple transmission point collaboration, which can improve data throughput. The multiple TRPs can communicate with the terminal in a coherent joint transmission (CJT) manner, and in the CJT collaboration mode, the multiple TRPs simultaneously provide network services to the terminal. The network can configure the multiple TRPs to send reference signals to the terminal, and enable coherent collaborative transmission of the multiple TRPs based on the relative channel state information between the TRPs measured and fed back by the terminal.

[0064] In the embodiment of the present application, the TRP may be an access network node, such as a baseband unit (BBU), a remote radio unit (RRU) or a distributed unit (DU) of a network device. Alternatively, the TRP may be an antenna panel or an antenna port group of a wireless access network device, and the present application does not limit the specific form of the TRP.

[0065] This application does not limit the specific technology and specific device form used by the terminal. It should be understood that in this application, "sending information / data to... (such as a terminal)" can be understood as the destination of the information being the terminal. It can include sending information / data directly or indirectly to the terminal. "Receiving information / data from... (such as a terminal)" can be understood as the source of the information being the terminal, which can include receiving information / data directly or indirectly from the terminal. The information / data may be subjected to necessary processing between the source and destination of the information / data transmission, such as format changes, etc., but the destination can understand the valid information / data from the source. Similar expressions in this application can be understood similarly and will not be repeated here.

[0066] In this application, "sending information / data" only refers to the direction of information / data transmission, including direct transmission via the air interface and indirect transmission via the air interface by the processing unit, and "sending" can also be understood as the "output" of the module interface. "Receiving information / data" only refers to the direction of information / data transmission, including direct reception via the air interface and indirect reception via the air interface by the processing unit, and "receiving" can also be understood as the "input" of the module interface.

[0067] The following is an explanation of the relevant technologies and terms involved in the embodiments of the present application.

[0068] 1. CSI

[0069] The terminal can obtain CSI by measuring a reference signal from an access network node. The CSI is used to characterize the channel characteristics of the communication channel between the terminal and the access network node. CSI may include but is not limited to one or more of channel quality indicator (CQI), precoding matrix indicator (PMI), channel state information reference signal (CSI-reference signal, CSI-RS) resource indicator (CSI-RS resource indicator, CRI), layer indicator (LI), rank indicator (RI), reference signal receiving power (RSRP), and signal to interference plus noise ratio (SINR), wherein CQI is used to indicate the modulation mode, target code rate and transmission block size that the channel can support under the premise of ensuring a predefined block error rate (BLER); PMI is used to indicate the precoding matrix that the terminal recommends the network-side transmission point to adopt in downlink transmission based on measurement, and the precoding matrix indicated by PMI can represent channel information; CRI is used to indicate the index of CSI-RS resources, which can be used to select communication beams; RI indicates the number of layers recommended by the terminal for downlink transmission; LI indicates the layer with the best channel quality.

[0070] The terminal may send the acquired CSI to the access network node, so that the access network node may process the information / data to be sent to the terminal based on the CSI to reduce the attenuation effect of the channel on the information / data.

[0071] 2. CJT CSI Measurement

[0072] The access network node can configure N for the terminal TRP channel state information reference signal (CSI-referencesignal, CSI-RS) resource groups, exemplarily, N TRP ∈{1,2,3,4}. N TRP CSI-RS resources correspond to NTRP TRPs.

[0073] The terminal measures the N according to the access network node configuration. TRPCSI-RS resources, and according to the measurement results, from N TRP Select N CSI-RS resources from CSI-RS resources, N≤N TRP The terminal reports the joint PMI corresponding to the N CSI-RS resources to the access network node, and reports the indication information of CSI-RS resource selection in the PMI, which is used to instruct the terminal to select the N CSI-RS resources according to the measurement results. TRP Which N CSI-RS resources are selected from the CSI-RS resources. The joint PMI corresponding to the N CSI-RS resources reported by the terminal adopts the codebook structure of the CJT codebook shown below:

[0074]

[0075] The CJT codebook follows the dual-domain compressed codebook structure of the enhanced Type II codebook defined in the technical specification (TS) of the 3rd Generation Partnership Project (3GPP). For the N CSI-RS resources selected by the terminal, the PMI includes the N precoding sub-matrices corresponding to the N CSI-RS resources, i.e., W1, ..., W N , where the precoding submatrix W corresponding to a CSI-RS resource n is n It is represented by a linear combination of a set of spatial basis vectors and a set of frequency domain basis vectors, 1≤n≤N. Among them, W 1,n is the spatial basis composed of the spatial basis vectors corresponding to the CSI-RS resource n, W f,n is the frequency domain basis vector corresponding to the CSI-RS resource n, (·) H It means taking the conjugate transpose of the matrix. The coefficient matrix representing the linear combination coefficients corresponding to the spatial domain basis vectors and frequency domain basis vectors of the CSI-RS resource n.

[0076] 3. Mobility CSI Measurement

[0077] The access network node configures a CSI-RS resource group for the terminal, and a CSI-RS resource group may include a periodic CSI-RS resource or a semi-persistent CSI-RS resource. Or a CSI-RS resource group may include multiple non-periodic CSI-RS resources, such as the CSI-RS resource group may be a resource corresponding to a non-periodic CSI-RS burst group, and the CSI-RS resource group includes multiple CSI-RS resources with fixed time intervals. The terminal completes CSI measurement according to the multiple CSI-RS carried by the CSI-RS resource group to obtain the CSI measurement result, and the terminal can predict the predicted CSI within a prediction time window according to the CSI measurement result, and the prediction time window can be called a CSI prediction window (CSI prediction window). The CSI prediction window includes N4 time units. Exemplarily, the time unit can be a slot, a subframe, a frame, a mini-slot, or an orthogonal frequency division multiplexing (OFDM) symbol. The terminal compresses and reports the predicted precoding matrix of the N4 time domain units using a mobility codebook, and the codebook structure of the mobility codebook is:

[0078]

[0079] The codebook structure further introduces time domain compression based on the dual-domain compression codebook (i.e., time domain and frequency domain compression) of the enhanced Type II codebook. W1 is the spatial basis composed of spatial basis vectors, and W f is the frequency domain basis composed of frequency domain basis vectors, W d is the frequency domain basis composed of the time domain basis vectors, is the coefficient matrix composed of the linear combination coefficients corresponding to the spatial basis vectors, frequency domain basis vectors and time domain basis vectors, is the Kronecker product operator, (·) * represents the conjugate of the matrix. Specifically, W d It is a time domain basis composed of Q time domain basis vectors, and the dimension of each time domain basis vector is N4×1. It can be understood that the terminal uses the Q time domain basis vectors to compress the predicted precoding matrix of the N4 time domain units. Exemplarily, the values ​​of N4 and Q can be N4∈{1,2,4,8}, Q=2, but the present application is not limited to this.

[0080] 4. CJT CSI Measurement in Mobility Scenarios

[0081] For CJT CSI measurement in mobility scenarios, one approach is to combine the above CJT CSI measurement method with the mobility CSI measurement method. The access network node can configure N TRP CSI-RS resource groups, N TRP CSI-RS resource groups correspond to N TRP In other words, in the case of joint transmission of multiple TRPs in the mobility scenario, in order to complete the CSI prediction of each TRP, each TRP corresponds to a CSI-RS resource group. The terminal obtains the N CSI-RS resource group configured by the access network node according to the CSI measurement result. TRP N CSI-RS resource groups are selected from the CSI-RS resource groups, and the joint PMI corresponding to the N CSI-RS resource groups in the predicted CSI prediction window is reported to the access network node using the CJT mobility codebook. The CJT mobility codebook can be understood as a direct combination and extension of the CJT codebook and the mobility codebook. The precoding submatrix of each CSI-RS resource is compressed in the time domain on the basis of the CJT codebook (as shown in the following formula). The codebook structure of the CJT mobility codebook can be expressed as:

[0082]

[0083] As described above, W 1,n is the spatial basis composed of the spatial basis vectors corresponding to CSI-RS resource n, W f,n is the frequency domain basis composed of the frequency domain basis vectors corresponding to the CSI-RS resource n. d,n It is the time domain basis composed of the time domain basis vectors corresponding to the CSI-RS resource n. It is a coefficient matrix composed of linear combination coefficients corresponding to the spatial domain basis vector, frequency domain basis vector and time domain basis vector of the CSI-RS resource n.

[0084] In the CJT CSI measurement and reporting method in this mobility scenario, the terminal TRP The terminal selects N CSI-RS resource groups from the CSI-RS resource groups. That is, the terminal recommends to the access network node, based on the CSI measurement results, that the N TRPs corresponding to the N CSI-RS resource groups can be used for collaborative transmission to the terminal. The N TRPs can be called a transmission point collaboration set. The terminal reports the predicted PMI of the N CSI-RS resource groups within the CSI prediction window to the access network node. However, when the CSI prediction window is long, that is, the number of time units included in the CSI prediction window is large, the optimal transmission point collaboration set that provides collaborative transmission for the terminal may change within the CSI prediction window due to terminal movement. For example Figure 3As shown in the figure, the optimal transmission point cooperation set of the terminal at time t1 in the CSI prediction window includes TRP1, TRP2, TRP3 and TRP4, and due to the movement of the terminal, the optimal cooperation point set of the terminal at time t2 in the CSI prediction window may change to TRP3 and TRP4. Therefore, the CJT CSI measurement and reporting method in the above mobility scenario may change the transmission point cooperation set within the prediction time, which makes the reliability of the CSI reported by the terminal low, thereby causing the problem of poor communication quality of cooperative transmission.

[0085] In response to the above-mentioned problems, the embodiments of the present application propose that the terminal, while considering its own mobility, determines whether the transmission point cooperation set has changed within the CSI prediction window, determines that the CSI prediction window contains one or more sub-prediction windows, and reports the transmission point cooperation set corresponding to each sub-prediction window to the access network node by indicating the reference signal resource group set corresponding to each sub-prediction window. The access network node can determine the sub-prediction windows contained in the CSI prediction window and the transmission point cooperation set corresponding to each sub-prediction window based on the information reported by the terminal. The flexibility of reporting the transmission point cooperation set is improved, so that the access network node can configure a transmission point cooperation set adapted to the terminal mobility to provide data transmission services for the terminal, which can improve the reliability of terminal communication.

[0086] Figure 4 is a schematic flow chart of an information transmission method 400 provided in an embodiment of the present application. Figure 4 The access network node in the illustrated embodiment may be an access network node that configures reference signal resources for a terminal, receives CSI fed back by the terminal, and the like. The access network node may configure N reference signal resource groups for the terminal, and the N reference signal resource groups correspond to N TRPs. The N TRPs are TRPs that can receive and / or send data of the terminal. The N TRPs may include the access network node, or may not include the access network node, and this application does not limit this.

[0087] S401, the terminal determines first indication information and second indication information, the first indication information and the second indication information are determined based on reference signals received on N reference signal resource groups, the first indication information is used to indicate that a CSI prediction window contains at least one sub-prediction window, the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, each of the N reference signal resource groups includes at least one reference signal resource group among the N reference signal resource groups, and the predicted CSI of a sub-prediction window in at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the sub-prediction window.

[0088] The terminal may receive reference signals carried on N reference signal resource groups from N TRPs, and measure each reference signal to obtain corresponding CSI measurement results. Each reference signal resource group may include one or more reference signal resources, wherein the reference signal may be a CSI-RS, and the reference signal resource group may be the CSI-RS resource group introduced above.

[0089] The terminal can judge the signal quality changes of each TRP in the CSI prediction window based on the CSI measurement results corresponding to the N reference signal resource groups, determine the changes of the TRP cooperation set in the CSI prediction window over time, and divide the CSI prediction window into one or more sub-prediction windows. If the terminal determines that the TRP cooperation set in the CSI prediction window remains unchanged, the CSI prediction window only includes one sub-prediction window. If the terminal determines that the TRP cooperation set in the CSI prediction window changes, the CSI prediction window includes multiple sub-prediction windows, where the TRP cooperation sets corresponding to any two adjacent sub-prediction windows are different.

[0090] It should be noted that in the present application, the CSI prediction window is a time interval (or the time interval can also be called a time period) during which the terminal needs to report the predicted CSI. The time interval includes N4 time units. The terminal and the access network node can reach a consensus on the time position of the N4 time units through signaling interaction. The terminal determines that the CSI prediction window includes L sub-prediction windows, where L is a positive integer. The sub-prediction window includes one or more continuous time units among the N4 time units, and different sub-prediction windows do not overlap in the time domain, that is, the time units contained in different sub-prediction windows are different time units among the N4 time units, and the sum of the number of time units contained in the L sub-prediction windows is N4.

[0091] Among them, the CSI prediction window can be replaced by (or the CSI prediction window can also be called) a CSI prediction time interval, and the sub-prediction window can be replaced by a sub-prediction time interval. Alternatively, the CSI prediction window can be replaced by a time unit group, and the sub-prediction window can be replaced by a sub-time unit group. Alternatively, the CSI prediction window can be replaced by N4 time units for the terminal to report the predicted CSI, and the sub-prediction window can be replaced by a time unit group in the N4 time units. This application is not limited to this.

[0092] The following indication method of the first indication information may include but is not limited to the following implementation mode 1 and implementation mode 2, which are respectively described below.

[0093] In implementation mode 1, the terminal indicates the position of at least one sub-prediction window in the CSI prediction window through first indication information. For example, the first indication information may indicate the position of at least one sub-prediction window by indicating the time length of each sub-prediction window in at least one prediction window, or the first indication information may indicate the position of at least one sub-prediction window by indicating the start time or end time of the sub-prediction window in at least one sub-prediction window, which is described below through the following examples 1 and 2, respectively.

[0094] Example 1: The first indication information indicates the time length of each sub-prediction window in at least one sub-prediction window.

[0095] It should be noted that the first indication information indicating the time length of each sub-prediction window in at least one sub-prediction window may be a direct indication or an indirect indication. In other words, the first indication information is used by the access network node to determine the time length of each sub-prediction window in the at least one sub-prediction window. The access network node may determine the time length of each sub-prediction window based on the first indication information.

[0096] The access network node may determine the position of each sub-prediction window in the CSI prediction window according to the time length of the CSI prediction window and the first indication information received from the terminal.

[0097] For example, the CSI prediction window includes N4 time units. If the CSI prediction window includes a sub-prediction window, the first indication information indicates the time length of a sub-prediction window, and the time length is N4, that is, the sub-prediction window includes N4 time units. If the CSI prediction window includes multiple sub-prediction windows, such as the CSI prediction window includes L sub-prediction windows. The first indication information indicates the time length of L sub-prediction windows. Specifically, if N4=8, L=3, the time lengths of the three sub-prediction windows indicated by the first indication information are 2, 3, and 3, respectively, indicating that the first two time units in the CSI prediction window are a sub-prediction window, the three time units from the third time unit to the fifth time unit are a sub-prediction window, and the last three time units are a sub-prediction window. Optionally, since the value of the number of time units N4 included in the CSI prediction window is known, the first indication information can indicate that the time lengths of the first two sub-prediction windows are 2 and 3 respectively, and the time length of the third sub-prediction window can be calculated according to the value of N4, that is, N4-2-3=3. In other words, the first indication information indirectly indicates the time length of the last sub-prediction window by indicating the time lengths of the first two sub-prediction windows. Alternatively, the first indication information can also indicate that the time lengths of the last two sub-prediction windows are 3 and 3, and the time length of the first sub-prediction window can be determined as 2 according to the value of N4.

[0098] Example 2: The first indication information indicates a start time or an end time of a sub-prediction window in at least one sub-prediction window.

[0099] It should be noted that the first indication information may directly or indirectly indicate the start time or end time of the sub-prediction window. In other words, the first indication information is used by the access network node to determine the start time or end time of the sub-prediction window in the at least one sub-prediction window.

[0100] The first indication information indicates the start time of the sub-prediction window in at least one sub-prediction window, and the access network node may take the end time of the CSI prediction window as the end point, and determine the position of each sub-prediction window in the CSI prediction window according to the start time of each sub-prediction window indicated by the first indication information. Alternatively, the first indication information indicates the end time of the sub-prediction window in at least one sub-prediction window, and the access network node may take the start time of the CSI prediction window as the starting point, and determine the position of each sub-prediction window in the CSI prediction window according to the end time of each sub-prediction window indicated by the first indication information.

[0101] For example, the first indication information indicates the starting time of each sub-prediction window, and the end time of a sub-prediction window is the starting time of the next sub-prediction window. If the CSI prediction window includes a sub-prediction window, the first indication information indicates the starting time of a sub-prediction window. If the first indication information indicates 1, it means that the starting time unit of the sub-prediction window is the first time unit. The first indication information does not include other starting times, indicating that the time length of the sub-prediction window is the time length of the CSI prediction window. If the CSI prediction window includes L sub-prediction windows, the first indication information may include L starting times. Specifically, if N4=8, L=3, the first indication information indicates the starting time units 1, 3, and 6 of the three sub-prediction windows. That is, the starting time unit of the first sub-prediction window is the first time unit in the CSI prediction window, and the starting time unit of the second sub-prediction window is the third time unit in the CSI prediction window. It can be determined that the first sub-prediction window includes the first time unit and the second time unit. The starting time unit of the third sub-prediction window is the sixth time unit in the CSI prediction window, so it can be determined that the second sub-prediction includes the third time unit to the fifth time unit, and the third sub-prediction window includes the sixth time unit to the eighth time unit.

[0102] In one method, when the first indication information indicates the starting time of a sub-prediction window, since the starting time unit of the first sub-prediction window is the first time unit, the first indication information may not indicate the starting time unit of the first sub-prediction window, and the starting time unit of the first sub-prediction window defaults to the first time unit of the CSI prediction window. Specifically, if N4=8, L=3, the first indication information may only indicate 3 and 6, indicating that the starting time unit of the second sub-prediction window is the third time unit in the CSI prediction window, and the time unit before the third time unit is the first sub-prediction window. Alternatively, it can also be understood that the first indication information is used to indicate the boundary time unit of two adjacent sub-prediction windows, and the first indication information indicates L-1 boundary time units, indicating that the CSI prediction window includes L sub-prediction windows. Among them, each boundary time unit is the starting time unit of a sub-prediction window.

[0103] For another example, the first indication information may indicate the end time of each sub-prediction window, and the CSI prediction window includes L sub-prediction windows, and the first indication information may include L end times. Alternatively, the first indication information may not indicate the end time unit of the last sub-prediction window, and the end time unit of the last sub-prediction window defaults to the last time unit of the CSI prediction window. Specifically, if N4=8, L=3, the first indication information may only indicate 2 and 5, indicating that the end time unit of the first sub-prediction window is the second time unit in the CSI prediction window, the end time unit of the second sub-prediction window is the fifth time unit in the CSI prediction window, and the remaining time units are the last sub-prediction window. Alternatively, it can also be understood that the first indication information is used to indicate the boundary time unit of two adjacent sub-prediction windows, and the first indication information indicates L-1 boundary time units, indicating that the CSI prediction window includes L sub-prediction windows. Among them, each boundary time unit is the end time unit of a sub-prediction window.

[0104] In implementation mode 2, the terminal indicates the number of sub-prediction windows included in the CSI prediction window through first indication information. The first indication information may indicate that the CSI prediction window includes one sub-prediction window, and the one sub-prediction window is the CSI prediction window. Alternatively, the first indication information may indicate that the CSI prediction window includes multiple sub-prediction windows.

[0105] For example, the first indication information includes 1 bit. The 1 bit indicates a first value, indicating that the CSI prediction window includes one sub-prediction window; the 1 bit indicates a second value, indicating that the CSI prediction window includes multiple sub-prediction windows. The first value is 0 and the second value is 1; or the first value is 1 and the second value is 0.

[0106] In the case where the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows, the first indication information also indicates the positions of the multiple sub-prediction windows in the CSI prediction window. For example, the first indication information indicates the time length of each sub-prediction window in at least one sub-prediction window. Or, the first indication information indicates the start time or end time of the sub-prediction window in at least one sub-prediction window. The specific indication method can be referred to the description in the previous text, which will not be repeated here.

[0107] The above describes the indication method of the first indication information determined by the terminal. The terminal also determines the second indication information, which is used to indicate at least one reference signal resource group set corresponding to at least one sub-prediction window in the CSI prediction window, and the predicted CSI of one sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the sub-prediction window. The specific indication method of the second indication information may include but is not limited to the following implementation modes 3 and 4, which are described below respectively.

[0108] In implementation mode 3, the second indication information includes at least one bit sequence (or a bitmap) corresponding to at least one sub-prediction window, and each bit sequence includes N bits corresponding to N reference signal resource groups. One bit in a bit sequence is used to indicate whether the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the bit. The reference signal resource group set corresponding to a bit sequence is the reference signal resource group set corresponding to the sub-prediction window corresponding to the bit sequence.

[0109] Exemplarily, if one bit in a bit sequence is 1, it indicates that the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the bit. If one bit in the bit sequence is 0, it indicates that the reference signal resource group set corresponding to the bit sequence does not include the reference signal resource group corresponding to the bit. The following is an example of using this indication method for a bit sequence. However, the present application is not limited to this, and in a specific implementation, it may also be: if one bit in a bit sequence is 0, it indicates that the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the bit. If one bit in the bit sequence is 0, it indicates that the reference signal resource group set corresponding to the bit sequence does not include the reference signal resource group corresponding to the bit.

[0110] For example, the CSI prediction window includes L sub-prediction windows, L is a positive integer, the second indication information includes L bit sequences, each bit sequence includes N bits, wherein the N bits correspond one-to-one to N reference signal resource groups, such as L=2, N=4, and the CSI prediction window includes 2 sub-prediction windows, then the second indication information includes 2 bit sequences, each bit sequence includes 4 bits, and the first bit to the fourth bit correspond to reference signal resource group 1, reference signal resource group 2, reference signal resource group 3, and reference signal resource group 4 in the four reference signal resource groups, respectively. The four reference signal resource groups are the reference signal resource groups of TRP1, TRP2, TRP3, and TRP4, respectively. The first bit sequence in the second indication information corresponds to the first sub-prediction window in the CSI prediction window, and the bit sequence is used to indicate the reference signal resources contained in the reference signal resource group set corresponding to the first sub-prediction window. If the 4 bits in the bit sequence are 1110, it means that the reference signal resource group set corresponding to the first sub-prediction window includes reference signal resource group 1, reference signal resource group 2, reference signal resource group 3, and does not include reference signal resource group 4. In other words, the TRP cooperation set corresponding to the first sub-prediction window includes TRP1, TRP2 and TRP3. If the 4 bits in the second bit sequence in the second indication information are 0101, it means that the reference signal resource group set corresponding to the second sub-prediction window includes reference signal resource group 2 and reference signal resource group 4, and does not include reference signal resource group 1 and reference signal resource group 3. In other words, the TRP cooperation set corresponding to the second sub-prediction window includes TRP2 and TRP4.

[0111] The number of time units N in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n It is the sum of the number of time units included in the sub-prediction windows of the corresponding reference signal resource group set including reference signal resource group n, 1≤n≤N.

[0112] That is, the CSI prediction window includes N4 time units, and the number of time units in which the predicted CSI is determined based on the reference signal resource group n is N. 4,n , the number N 4,n Specifically, it is the sum of the number of time units included in the sub-prediction windows that include the reference signal resource group n in the reference signal resource group set.

[0113] For example, in this embodiment, N 4,n satisfy:

[0114]

[0115] Where L is the number of sub-prediction windows contained in the CSI prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the lth sub-prediction window, X l is the number of time units contained in the l-th sub-prediction window, 1≤l≤L, and l is an integer.

[0116] For example, in the above example of L=2, N=4, the first sub-prediction window includes 3 time units, and the second sub-prediction window includes 5 time units. The 4 bits in the first bit sequence in the second indication information are 1110, that is, the reference signal resource group set corresponding to the first sub-prediction window includes reference signal resource group 1, reference signal resource group 2, and reference signal resource group 3. The 4 bits in the second bit sequence are 0101, that is, the reference signal resource group set corresponding to the second sub-prediction window includes reference signal resource group 2 and reference signal resource group 4. Then, the predicted CSI in the CSI prediction window is the number of time units determined based on reference signal resource group 1. The predicted CSI is the number of time units determined based on reference signal resource group 2 Similarly, the number of time units N corresponding to reference signal resource group 3 can be determined 4,3 =3, the number of time units corresponding to reference signal resource group 4 N 4,4 =5.

[0117] It should be understood that the above description is based on an example in which one bit in a bit sequence is 1 or 0, respectively indicating that the reference signal resource group set corresponding to the bit sequence includes or does not include the reference signal resource group corresponding to the bit. If the opposite is true, that is, one bit is 1 or 0, respectively indicating that the reference signal resource group set corresponding to the bit sequence does not include or includes the reference signal resource group corresponding to the bit, then N 4,n The expressions that are satisfied need to be adjusted accordingly.

[0118] In implementation mode 4, the second indication information includes at least one bit sequence (or a bit map) corresponding to at least one sub-prediction window, and each bit sequence includes N bits corresponding to N reference signal resource groups.

[0119] A first sub-prediction window in the at least one sub-prediction window corresponds to a first bit sequence in the at least one bit sequence, and a bit in the first bit sequence is used to indicate whether a reference signal resource group set corresponding to the first sub-prediction window includes a reference signal resource group corresponding to the bit;

[0120] The kth sub-prediction window in at least one sub-prediction window corresponds to a second bit sequence in at least one bit sequence, and one bit in the second bit sequence is used to indicate whether the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the reference sub-prediction window and the reference signal resource group corresponding to the bit, and k is an integer greater than 1. Optionally, the reference sub-prediction window is the first sub-prediction window or the k-1th sub-prediction window.

[0121] Exemplarily, one bit in the first bit sequence is 1, indicating that the reference signal resource group set corresponding to the first sub-prediction window includes the reference signal resource group corresponding to the bit; one bit in the first bit sequence is 0, indicating that the reference signal resource group set corresponding to the first sub-prediction window does not include the reference signal resource group corresponding to the bit;

[0122] One bit in the second bit sequence is 1, indicating that the inclusion relationship between the reference signal resource group set corresponding to the k-th sub-prediction window and the reference signal resource group corresponding to the bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the bit; one bit in the first bit sequence is 0, indicating that the inclusion relationship between the reference signal resource group set corresponding to the k-th sub-prediction window and the reference signal resource group corresponding to the bit remains unchanged compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the bit.

[0123] For example, the CSI prediction window includes L sub-prediction windows, and the second indication information includes L bit sequences, each bit sequence includes N bits, wherein the N bits correspond one-to-one to N reference signal resource groups, such as L=2, N=4, and the CSI prediction window includes 2 sub-prediction windows, then the second indication information includes 2 bit sequences, each bit sequence includes 4 bits. Among them, the first bit sequence (i.e., an example of the first bit sequence) corresponds to the first sub-prediction window, and in the first bit sequence, the first bit to the fourth bit correspond to the reference signal resource group 1, reference signal resource group 2, reference signal resource group 3, and reference signal resource group 4 in the four reference signal resource groups, respectively. If the 4 bits in the bit sequence are 1110, it means that the reference signal resource group set corresponding to the first sub-prediction window includes reference signal resource group 1, reference signal resource group 2, reference signal resource group 3, and does not include reference signal resource group 4. That is, the TRP coordination set corresponding to the first sub-prediction window includes TRP1, TRP2, and TRP3.

[0124] If the first sub-prediction window is a reference sub-prediction window, the second bit sequence in the second indication information (i.e., an example of the second bit sequence) corresponds to the second sub-prediction window, and one bit in the second bit sequence is used to indicate whether the inclusion relationship between the reference signal resource group set corresponding to the second sub-prediction window and the reference signal resource group corresponding to the bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the bit. If the four bits in the second bit sequence are 1011, and the first bit is 1, it indicates that the inclusion relationship has changed, and the reference signal resource group set corresponding to the first sub-prediction window includes reference signal resource group 1. Since the inclusion relationship has changed, the reference signal resource group set corresponding to the second sub-prediction window does not include reference signal resource group 1. The second bit is 0, indicating that the inclusion relationship has not changed. Since the reference signal resource group set corresponding to the first sub-prediction window includes reference signal resource group 2, the reference signal resource group set corresponding to the second sub-prediction window also includes reference signal resource group 2. The third bit is 1. Since the reference signal resource group set corresponding to the first sub-prediction window includes reference signal resource group 3, the reference signal resource group set corresponding to the second sub-prediction window does not include reference signal resource group 3. The fourth bit is 0, and since the reference signal resource group set corresponding to the first sub-prediction window does not include reference signal resource group 4, the reference signal resource group set corresponding to the second sub-prediction window includes reference signal resource group 4. Therefore, based on the fact that the 4 bits in the second bit sequence are 1011, it can be determined that the reference signal resource group set corresponding to the second sub-prediction window includes reference signal resource group 2 and reference signal resource group 4. In other words, the TRP coordination set corresponding to the second sub-prediction window includes TRP2 and TRP4.

[0125] Exemplarily, in this embodiment, the number N of time units determined based on the reference signal resource group n in the CSI prediction window is 4,n satisfy:

[0126]

[0127] Where L is the number of sub-prediction windows contained in the CSI prediction window, is the value of the bit corresponding to TRPn in the bit sequence corresponding to the first sub-prediction window, is the value of the bit corresponding to TRPn in the bit sequence corresponding to the kth sub-prediction window, X1 is the number of time units contained in the first sub-prediction window, and X k is the number of time units contained in the kth sub-prediction window, and k is an integer greater than 1 and less than or equal to L. Represents a modulo-2 addition operation.

[0128] For example, in the above example of L=2, N=4, the first sub-prediction window includes 3 time units, and the second sub-prediction window includes 5 time units. The first bit sequence in the second indication information is 1110, that is, the reference signal resource group set corresponding to the first sub-prediction window includes reference signal resource group 1, reference signal resource group 2, and reference signal resource group 3. The second bit sequence is 1011, that is, the reference signal resource group set corresponding to the second sub-prediction window includes reference signal resource group 2 and reference signal resource group 4. Then, the predicted CSI in the CSI prediction window is the number of time units determined based on reference signal resource group 1. The predicted CSI is the number of time units determined based on reference signal resource group 2 Similarly, the number of time units corresponding to reference signal resource group 3 can be determined Number of time units corresponding to reference signal resource group 4

[0129] It should be understood that the above description is based on an example in which one bit in a bit sequence is 1 or 0, respectively indicating that the reference signal resource group set corresponding to the bit sequence includes or does not include the reference signal resource group corresponding to the bit. If the opposite is true, that is, one bit is 1 or 0, respectively indicating that the reference signal resource group set corresponding to the bit sequence does not include or includes the reference signal resource group corresponding to the bit, then N 4,n The expressions that are satisfied need to be adjusted accordingly.

[0130] The above describes the indication method of the second indication information, and how to determine the number of time units N corresponding to the reference signal resource group n in the CSI prediction window in each indication method. 4,n After determining the first indication information and the second indication information, the terminal may execute S402.

[0131] S402: The terminal sends first indication information and second indication information to an access network node.

[0132] Accordingly, the access network node receives the first indication information and the second indication information from the terminal. After receiving the first indication information, the access network node can determine the position of one or more sub-prediction windows included in the CSI prediction window, and can determine the reference signal resource group set corresponding to each sub-prediction window according to the second indication information.

[0133] It should be understood that the terminal can send the first indication information and the second indication information separately, such as the terminal can encode the first indication information and the second indication information separately and then send them, and the access network node can decode them separately and independently to obtain the first indication information and the second indication information. Moreover, the embodiment of the present application does not limit the order in which the terminal sends the first indication information and the second indication information. Alternatively, the terminal can send the first indication information and the second indication information at the same time, and the simultaneous sending of the first indication information and the second indication information here can be understood as the terminal encoding the information containing the first indication information and the second indication information and then sending it. Accordingly, the access network node receives the encoded information from the terminal and decodes it to obtain the first indication information and the second indication information. This application does not limit this.

[0134] The terminal also reports the predicted CSI corresponding to the CSI prediction window to the access network node. The terminal can use the CJT mobility codebook introduced above to report the N corresponding to each reference signal resource group n in the CSI prediction window. 4,n The codebook structure of the CJT mobility codebook can be expressed as:

[0135]

[0136] Among them, for reference signal resource group n, the corresponding precoding sub-matrix is ​​W n , generate the precoding sub-matrix W n The time domain basis W d,n It includes Qn time domain basis vectors, and the dimension of each time domain basis vector is N 4,n .

[0137] According to the above scheme, the terminal determines whether the transmission point cooperation set changes within the prediction time window of the CSI while considering its own mobility, determines that the CSI prediction window contains one or more sub-prediction windows, and notifies the access network node of the sub-prediction windows contained in the CSI prediction window and the reference signal resource set corresponding to each sub-prediction window through the first indication information and the second indication information. The access network node can determine the TRP cooperation set corresponding to the sub-prediction window in the CSI prediction window based on the information reported by the terminal. The flexibility of reporting the transmission point cooperation set is improved, so that the access network node can configure a transmission point cooperation set that is adapted to the terminal mobility to provide data transmission services for the terminal, which can improve the reliability of terminal communication.

[0138] It is understandable that, in order to implement the functions in the above embodiments, the access network node and the terminal include hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0139] Figure 5 and Figure 6 The following is a schematic diagram of the structure of possible communication devices provided in the embodiments of the present application. These communication devices can be used to implement the functions of the terminal or access network node in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device can be as follows: Figure 1 One of the terminals 120a-120j shown may also be Figure 1 The access network node 110a or 110b shown may also be a module (such as a chip or a chip system) applied to a terminal or an access network node.

[0140] The communication device 500 includes a transceiver unit 520, which can be used to receive or send information. The communication device 500 may also include a processing unit 510, which can be used to process instructions or data to implement corresponding operations.

[0141] It should be understood that when the communication device 500 is a chip configured in (or used in) a communication device, the transceiver unit 520 in the communication device 500 can be the input / output interface or circuit of the chip, and the processing unit 510 in the communication device 500 can be the processor in the chip.

[0142] Optionally, the communication device 500 may further include a storage unit 530, which may be used to store instructions or data, and the processing unit 510 may execute the instructions or data stored in the storage unit to enable the communication device to implement corresponding operations.

[0143] The communication device 500 can be used to implement the above Figure 4 The functions of the first communication device or the second communication device in the method embodiment shown in FIG.

[0144] When the communication device 500 is used to implement Figure 4The functions of the first communication device in the method embodiment shown are: a processing unit 510, configured to determine first indication information and second indication information, wherein the first indication information and the second indication information are determined based on reference signals received on N reference signal resource groups, each of the N reference signal resource groups including one or more reference signal resources, wherein the first indication information is used to indicate that a CSI prediction window includes at least one sub-prediction window, and the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, each of the reference signal resource group sets including at least one reference signal resource group in the N reference signal resource groups, and the predicted CSI of one sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the one sub-prediction window. A transceiver unit 520, configured to send the first indication information and the second indication information.

[0145] When the communication device 500 is used to implement Figure 4 The functions of the access network node in the method embodiment shown are: a transceiver unit 520, configured to receive first indication information and second indication information, the first indication information and second indication information being determined based on reference signals received on N reference signal resource groups, each of the N reference signal resource groups comprising multiple reference signal resources, wherein the first indication information is used to indicate multiple sub-prediction windows included in a CSI prediction window, the second indication information is used to indicate multiple reference signal resource group sets corresponding to the multiple sub-prediction windows, each of the reference signal resource group sets comprising at least one reference signal resource group in the N reference signal resource groups, and the predicted CSI of one of the multiple sub-prediction windows is determined based on the reference signal resource group set corresponding to the one sub-prediction window. A processing unit 510, configured to determine the predicted CSI corresponding to each time unit in the CSI prediction window based on the first indication information and the second indication information.

[0146] For more detailed description of the processing unit 510 and the transceiver unit 520, please refer to Figure 4 The method embodiment shown is described in detail.

[0147] It should be understood that the transceiver unit 520 in the communication device 500 can be implemented through a communication interface (such as a transceiver, a transceiver circuit, an input / output interface, or a pin, etc.). When the communication interface is a transceiver, the transceiver can be composed of a receiver and / or a transmitter. The processing unit 510 in the communication device 500 can be implemented by at least one processor, and the processing unit 510 in the communication device 500 can also be implemented by at least one logic circuit. Optionally, the communication device 500 also includes a storage unit, which can be implemented by a memory.

[0148] like Figure 6As shown, the communication device 600 includes a processor 610 and an interface circuit 620. The processor 610 and the interface circuit 620 are coupled to each other. It is understood that the interface circuit 620 can be a transceiver or an input-output interface. Optionally, the communication device 600 may also include a memory 630 for storing instructions executed by the processor 610 or storing input data required by the processor 610 to execute instructions or storing data generated after the processor 610 executes instructions.

[0149] In one implementation, the memory 630 may also be integrated into the processor 610 , or may be independent of the processor 610 .

[0150] When the communication device 600 is used to implement Figure 4 When the method is shown, the processor 610 is used to implement the function of the above-mentioned processing unit 510, and the interface circuit 620 is used to implement the function of the above-mentioned transceiver unit 520.

[0151] When the above communication device is a chip applied to a terminal device, the terminal device chip can realize the functions of the terminal in the above method embodiment. The terminal device chip receives information from other modules in the terminal device (such as a radio frequency module or an antenna), and the information is sent to the terminal device by the access network node; or the terminal device chip sends information to other modules in the terminal device (such as a radio frequency module or an antenna), and the information is sent to the access network node by the terminal device.

[0152] When the above-mentioned communication device is a module applied to a network device, the network device module can implement the function of the access network node in the above-mentioned method embodiment. The network device module receives information from other modules in the access network node (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the access network node; or, the network device module sends information to other modules in the access network node (such as a radio frequency module or an antenna), and the information is sent by the access network node to the terminal device. The network device module here can be a baseband chip of an access network node, or it can be a DU or other module. The DU here can be a DU under an open radio access network (O-RAN) architecture.

[0153] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0154] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in an access network device or a terminal device. The processor and the storage medium can also be present in an access network device or a terminal device as discrete components.

[0155] According to the method provided in the embodiment of the application, the embodiment of the application also provides a computer program product, which includes: computer program code, when the computer program code is executed by one or more processors, the device including the processor executes as follows Figure 4 The method shown.

[0156] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device.

[0157] According to the method provided in the embodiment of the present application, the embodiment of the present application also provides a computer-readable storage medium, which stores the above-mentioned computer program or instruction. When the computer program or instruction is executed by one or more processors, the device including the processor executes the following Figure 4 The method shown.

[0158] As described above, the computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instruction may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disc; it may also be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

[0159] According to the method provided in the embodiment of the present application, the embodiment of the present application also provides a communication system, including the one or more terminals mentioned above. The system may further include the one or more access network nodes mentioned above.

[0160] In the several provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the devices described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0161] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of this solution.

[0162] In the various embodiments of the present application, unless otherwise specified or provided for in any logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0163] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A reference signal resource indication method, characterized in that: include: Determine first indication information and second indication information, wherein the first indication information and the second indication information are determined according to reference signals received on N reference signal resource groups, each of the N reference signal resource groups includes one or more reference signal resources, wherein the first indication information is used to indicate that a CSI prediction window includes at least one sub-prediction window, and the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, each of the reference signal resource group sets includes at least one reference signal resource group of the N reference signal resource groups, and the predicted CSI of one sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the one sub-prediction window; The first indication information and the second indication information are sent.

2. The method according to claim 1, characterized in that The first indication information indicates the time length of each sub-prediction window in the at least one sub-prediction window; or, the first indication information indicates the start time or end time of each sub-prediction window in the at least one sub-prediction window.

3. The method according to claim 1, characterized in that The first indication information indicates that the CSI prediction window includes one sub-prediction window; or the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows; When the first indication information indicates that the prediction window includes multiple sub-prediction windows, the first indication information also indicates the time length of each sub-prediction window in the multiple sub-prediction windows; or, the first indication information also indicates the start time or end time of each sub-prediction window in the multiple sub-prediction windows.

4. The method according to claim 3, characterized in that The first indication information includes 1 bit, The 1 bit is a first value, indicating that the CSI prediction window includes a sub-prediction window; or, The 1 bit is a second value, indicating that the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows.

5. The method according to any one of claims 1 to 4, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, One bit in one of the bit sequences is used to indicate whether the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit, wherein the reference signal resource group set corresponding to the bit sequence is the reference signal resource group set corresponding to the sub-prediction window corresponding to the bit sequence.

6. The method according to claim 5, characterized in that One bit in the bit sequence is 1, indicating that the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit; One bit in the bit sequence is 0, indicating that the reference signal resource group set corresponding to the bit sequence does not include the reference signal resource group corresponding to the one bit.

7. The method according to claim 6, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, L is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the lth sub-prediction window, X l is the number of time units contained in the l-th sub-prediction window, 1≤l≤L, and l is an integer.

8. The method according to any one of claims 1 to 4, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, A first sub-prediction window in the at least one sub-prediction window corresponds to a first bit sequence in the at least one bit sequence, and a bit in the first bit sequence is used to indicate whether a reference signal resource group set corresponding to the first sub-prediction window includes a reference signal resource group corresponding to the one bit; The k-th sub-prediction window in the at least one sub-prediction window corresponds to a second bit sequence in the at least one bit sequence, and one bit in the second bit sequence is used to indicate whether an inclusion relationship between a reference signal resource group set corresponding to the k-th sub-prediction window and a reference signal resource group corresponding to the one bit is changed compared to an inclusion relationship between a reference signal resource group set corresponding to the reference sub-prediction window and a reference signal resource group corresponding to the one bit, and k is an integer greater than 1, The reference sub-prediction window is the first sub-prediction window or the k-1th sub-prediction window.

9. The method according to claim 8, characterized in that One bit in the first bit sequence is 1, indicating that the reference signal resource group set corresponding to the first sub-prediction window includes the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the reference signal resource group set corresponding to the first sub-prediction window does not include the reference signal resource group corresponding to the one bit; One bit in the second bit sequence is 1, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit remains unchanged compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit.

10. The method according to claim 9, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, L is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the first sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the kth sub-prediction window, X1 is the number of time units contained in the first sub-prediction window, and X k is the number of time units contained in the k-th sub-prediction window, k is an integer greater than 1 and less than or equal to L, Represents a modulo-2 addition operation.

11. A reference signal resource indication method, characterized in that: include: receiving first indication information and second indication information, wherein the first indication information and the second indication information are determined according to reference signals received on N reference signal resource groups, each of the N reference signal resource groups including one or more reference signal resources, wherein the first indication information is used to indicate that a CSI prediction window includes at least one sub-prediction window, and the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, each of the reference signal resource group sets including at least one reference signal resource group of the N reference signal resource groups, and a predicted CSI of a sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the sub-prediction window; Determine, according to the first indication information and the second indication information, a predicted CSI corresponding to each time unit in the CSI prediction window.

12. The method according to claim 11, characterized in that The first indication information indicates the time length of each sub-prediction window in the at least one sub-prediction window; or, the first indication information indicates the start time or end time of each sub-prediction window in the at least one sub-prediction window.

13. The method according to claim 11, characterized in that The first indication information indicates that the CSI prediction window includes one sub-prediction window; or the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows; When the first indication information indicates that the prediction window includes multiple sub-prediction windows, the first indication information also indicates the time length of each sub-prediction window in the multiple sub-prediction windows; or, the first indication information also indicates the start time or end time of each sub-prediction window in the multiple sub-prediction windows.

14. The method according to claim 13, characterized in that The first indication information includes 1 bit, The 1 bit is a first value, indicating that the CSI prediction window includes a sub-prediction window; or, The 1 bit is a second value, indicating that the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows.

15. The method according to any one of claims 11 to 14, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, One bit in one of the bit sequences is used to indicate whether the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit, wherein the reference signal resource group set corresponding to the bit sequence is the reference signal resource group set corresponding to the sub-prediction window corresponding to the bit sequence.

16. The method according to claim 15, characterized in that One bit in the bit sequence is 1, indicating that the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit; One bit in the bit sequence is 0, indicating that the reference signal resource group set corresponding to the bit sequence does not include the reference signal resource group corresponding to the one bit.

17. The method according to claim 16, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, L is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the lth sub-prediction window, X l is the number of time units contained in the l-th sub-prediction window, 1≤l≤L, and l is an integer.

18. The method according to any one of claims 11 to 14, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, A first sub-prediction window in the at least one sub-prediction window corresponds to a first bit sequence in the at least one bit sequence, and a bit in the first bit sequence is used to indicate whether a reference signal resource group set corresponding to the first sub-prediction window includes a reference signal resource group corresponding to the one bit; The k-th sub-prediction window in the at least one sub-prediction window corresponds to a second bit sequence in the at least one bit sequence, and one bit in the second bit sequence is used to indicate whether an inclusion relationship between a reference signal resource group set corresponding to the k-th sub-prediction window and a reference signal resource group corresponding to the one bit is changed compared to an inclusion relationship between a reference signal resource group set corresponding to the reference sub-prediction window and a reference signal resource group corresponding to the one bit, and k is an integer greater than 1, The reference sub-prediction window is the first sub-prediction window or the k-1th sub-prediction window.

19. The method according to claim 18, characterized in that One bit in the first bit sequence is 1, indicating that the reference signal resource group set corresponding to the first sub-prediction window includes the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the reference signal resource group set corresponding to the first sub-prediction window does not include the reference signal resource group corresponding to the one bit; One bit in the second bit sequence is 1, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit remains unchanged compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit.

20. The method according to claim 19, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, K is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the first sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the kth sub-prediction window, X1 is the number of time units contained in the first sub-prediction window, and X k is the number of time units contained in the k-th sub-prediction window, k is an integer greater than 1 and less than or equal to K, Represents a modulo-2 addition operation.

21. A communication device, characterized in that: include: a processing unit, configured to determine first indication information and second indication information, wherein the first indication information and the second indication information are determined according to reference signals received on N reference signal resource groups, each of the N reference signal resource groups comprising one or more reference signal resources, wherein the first indication information is used to indicate that a CSI prediction window comprises at least one sub-prediction window, and the second indication information is used to indicate at least one reference signal resource group set corresponding to the at least one sub-prediction window, each of the reference signal resource group sets comprising at least one reference signal resource group of the N reference signal resource groups, and a predicted CSI of a sub-prediction window in the at least one sub-prediction window is determined based on the reference signal resource group set corresponding to the sub-prediction window; A transceiver unit is used to send the first indication information and the second indication information.

22. The device according to claim 21, characterized in that The first indication information indicates the time length of each sub-prediction window in the at least one sub-prediction window; or, the first indication information indicates the start time or end time of each sub-prediction window in the at least one sub-prediction window.

23. The device according to claim 21, characterized in that The first indication information indicates that the CSI prediction window includes one sub-prediction window; or the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows; When the first indication information indicates that the prediction window includes multiple sub-prediction windows, the first indication information also indicates the time length of each sub-prediction window in the multiple sub-prediction windows; or, the first indication information also indicates the start time or end time of each sub-prediction window in the multiple sub-prediction windows.

24. The device according to claim 23, characterized in that The first indication information includes 1 bit, The 1 bit is a first value, indicating that the CSI prediction window includes a sub-prediction window; or, The 1 bit is a second value, indicating that the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows.

25. The device according to any one of claims 21 to 24, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, One bit in one of the bit sequences is used to indicate whether the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit, wherein the reference signal resource group set corresponding to the bit sequence is the reference signal resource group set corresponding to the sub-prediction window corresponding to the bit sequence.

26. The device according to claim 25, characterized in that One bit in the bit sequence is 1, indicating that the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit; One bit in the bit sequence is 0, indicating that the reference signal resource group set corresponding to the bit sequence does not include the reference signal resource group corresponding to the one bit.

27. The device according to claim 26, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, L is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the lth sub-prediction window, X l is the number of time units contained in the l-th sub-prediction window, 1≤l≤L, and l is an integer.

28. The device according to any one of claims 21 to 24, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, A first sub-prediction window in the at least one sub-prediction window corresponds to a first bit sequence in the at least one bit sequence, and a bit in the first bit sequence is used to indicate whether a reference signal resource group set corresponding to the first sub-prediction window includes a reference signal resource group corresponding to the one bit; The k-th sub-prediction window in the at least one sub-prediction window corresponds to a second bit sequence in the at least one bit sequence, and one bit in the second bit sequence is used to indicate whether an inclusion relationship between a reference signal resource group set corresponding to the k-th sub-prediction window and a reference signal resource group corresponding to the one bit is changed compared to an inclusion relationship between a reference signal resource group set corresponding to the reference sub-prediction window and a reference signal resource group corresponding to the one bit, and k is an integer greater than 1, The reference sub-prediction window is the first sub-prediction window or the k-1th sub-prediction window.

29. The device according to claim 28, characterized in that One bit in the first bit sequence is 1, indicating that the reference signal resource group set corresponding to the first sub-prediction window includes the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the reference signal resource group set corresponding to the first sub-prediction window does not include the reference signal resource group corresponding to the one bit; One bit in the second bit sequence is 1, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit remains unchanged compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit.

30. The device according to claim 29, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, K is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the first sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the kth sub-prediction window, X1 is the number of time units contained in the first sub-prediction window, and X k is the number of time units contained in the k-th sub-prediction window, k is an integer greater than 1 and less than or equal to K, Represents a modulo-2 addition operation.

31. A communication device, characterized in that: include: A transceiver unit, configured to receive first indication information and second indication information, wherein the first indication information and the second indication information are determined based on reference signals received on N reference signal resource groups, each of the N reference signal resource groups comprising multiple reference signal resources, wherein the first indication information is used to indicate multiple sub-prediction windows included in a CSI prediction window, and the second indication information is used to indicate multiple reference signal resource group sets corresponding to the multiple sub-prediction windows, each of the reference signal resource group sets comprising at least one reference signal resource group in the N reference signal resource groups, and the predicted CSI of one of the multiple sub-prediction windows is determined based on the reference signal resource group set corresponding to the one sub-prediction window; A processing unit is used to determine the predicted CSI corresponding to each time unit in the CSI prediction window according to the first indication information and the second indication information.

32. The device according to claim 31, characterized in that The first indication information indicates the time length of each sub-prediction window in the at least one sub-prediction window; or, the first indication information indicates the start time or end time of each sub-prediction window in the at least one sub-prediction window.

33. The device according to claim 31, characterized in that The first indication information indicates that the CSI prediction window includes one sub-prediction window; or the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows; When the first indication information indicates that the prediction window includes multiple sub-prediction windows, the first indication information also indicates the time length of each sub-prediction window in the multiple sub-prediction windows; or, the first indication information also indicates the start time or end time of each sub-prediction window in the multiple sub-prediction windows.

34. The device according to claim 33, characterized in that The first indication information includes 1 bit, The 1 bit is a first value, indicating that the CSI prediction window includes a sub-prediction window; or, The 1 bit is a second value, indicating that the first indication information indicates that the CSI prediction window includes multiple sub-prediction windows.

35. The device according to any one of claims 31 to 34, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, One bit in one of the bit sequences is used to indicate whether the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit, wherein the reference signal resource group set corresponding to the bit sequence is the reference signal resource group set corresponding to the sub-prediction window corresponding to the bit sequence.

36. The device according to claim 35, characterized in that One bit in the bit sequence is 1, indicating that the reference signal resource group set corresponding to the bit sequence includes the reference signal resource group corresponding to the one bit; One bit in the bit sequence is 0, indicating that the reference signal resource group set corresponding to the bit sequence does not include the reference signal resource group corresponding to the one bit.

37. The device according to claim 36, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, L is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the lth sub-prediction window, X l is the number of time units contained in the l-th sub-prediction window, 1≤l≤L, and l is an integer.

38. The device according to any one of claims 31 to 34, characterized in that The second indication information includes at least one bit sequence corresponding to the at least one sub-prediction window, each of the bit sequences includes N bits corresponding to the N reference signal resource groups, A first sub-prediction window in the at least one sub-prediction window corresponds to a first bit sequence in the at least one bit sequence, and a bit in the first bit sequence is used to indicate whether a reference signal resource group set corresponding to the first sub-prediction window includes a reference signal resource group corresponding to the one bit; The k-th sub-prediction window in the at least one sub-prediction window corresponds to a second bit sequence in the at least one bit sequence, and one bit in the second bit sequence is used to indicate whether an inclusion relationship between a reference signal resource group set corresponding to the k-th sub-prediction window and a reference signal resource group corresponding to the one bit is changed compared to an inclusion relationship between a reference signal resource group set corresponding to the reference sub-prediction window and a reference signal resource group corresponding to the one bit, and k is an integer greater than 1, The reference sub-prediction window is the first sub-prediction window or the k-1th sub-prediction window.

39. The device according to claim 38, characterized in that One bit in the first bit sequence is 1, indicating that the reference signal resource group set corresponding to the first sub-prediction window includes the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the reference signal resource group set corresponding to the first sub-prediction window does not include the reference signal resource group corresponding to the one bit; One bit in the second bit sequence is 1, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit has changed compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit; one bit in the first bit sequence is 0, indicating that the inclusion relationship between the reference signal resource group set corresponding to the kth sub-prediction window and the reference signal resource group corresponding to the one bit remains unchanged compared to the inclusion relationship between the reference signal resource group set corresponding to the first sub-prediction window and the reference signal resource group corresponding to the one bit.

40. The device according to claim 39, characterized in that The number N of time units in the CSI prediction window for determining the predicted CSI based on the reference signal resource group n 4,n is the sum of the number of time units contained in the sub-prediction window of the reference signal resource group n included in the corresponding reference signal resource group set, 1≤n≤N, and N 4,n satisfy: Wherein, K is the number of sub-prediction windows contained in the at least one sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the first sub-prediction window, is the value of the bit corresponding to the reference signal resource group n in the bit sequence corresponding to the kth sub-prediction window, X1 is the number of time units contained in the first sub-prediction window, and X k is the number of time units contained in the k-th sub-prediction window, k is an integer greater than 1 and less than or equal to K, Represents a modulo-2 addition operation.

41. A communication device, characterized in that: The device comprises a processor, wherein the processor is configured to execute a computer program stored in a memory, so that the communication device executes the method according to any one of claims 1 to 10, or executes the method according to any one of claims 11 to 20.

42. The device according to claim 41, characterized in that The processor includes the memory.

43. A communication device, characterized in that: include: A logic circuit and a communication interface, wherein the logic circuit is used to process information to be processed to obtain processed information, and the communication interface is used to obtain the information to be processed, and / or output the processed information, so that the communication device executes the method described in any one of claims 1 to 10, or executes the method described in any one of claims 11 to 20.

44. The device according to claim 41 or 43, characterized in that The device is a chip.

45. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed, the method according to any one of claims 1 to 10 is implemented, or the method according to any one of claims 11 to 20 is implemented.

46. ​​A communication system, characterized in that: The method comprises a communication device for executing any one of claims 21 to 30, and a communication device for executing any one of claims 31 to 40.

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