Channel state information transmission method, apparatus and device, and storage medium

Abstract

Provided are a channel state information transmission method, apparatus and device, and a storage medium. The channel state information transmission method comprises: receiving at least one reporting configuration sent by a first network device, wherein each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell; receiving cell handover signaling sent by the first network device, wherein the cell handover signaling is used for determining at least one of a target handover cell among the at least one candidate cell, a target reporting configuration among the at least one reporting configuration, and a target CSI-RS among CSI-RSs associated with the at least one reporting configuration; and according to the cell handover signaling, sending, to a second network device, CSI corresponding to the target reporting configuration and the target CSI-RS, wherein the second network device corresponds to the target handover cell.

Description

Channel status information transmission method, apparatus, equipment and storage medium

[0001] This disclosure claims priority to Chinese Patent Application No. 202510385401.1, filed with the Chinese Patent Office on March 28, 2025, entitled “Method, Apparatus, Device and Storage Medium for Transmitting Channel State Information”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of communication technology, and in particular to a method, apparatus, device and storage medium for transmitting channel state information. Background Technology

[0003] During cell handover in related technologies, when a terminal receives a cell handover signaling message from the serving cell, it disconnects from the serving cell and switches to the target cell. For the target cell, after receiving a reconfiguration completion message from the terminal, it begins scheduling data transmission from the terminal. However, since the target cell does not have the channel state information corresponding to this terminal at this time, it can only use the lowest modulation and coding scheme (MCS) level for data scheduling, leading to a decrease in transmission performance.

[0004] As mentioned above, cell handover scenarios in related technologies can lead to problems such as decreased data transmission performance. Summary of the Invention

[0005] The purpose of this disclosure is to provide a method, apparatus, device, and storage medium for transmitting channel state information, so as to solve the problem of data transmission performance degradation in cell handover scenarios in related technologies.

[0006] To address the aforementioned technical problems, this disclosure provides a channel state information transmission method, applied to a terminal, comprising:

[0007] Receive at least one reporting configuration sent by a first network device; one of the reporting configurations is associated with at least one Channel State Information Reference Signal (CSI-RS), and one of the reporting configurations corresponds to at least one candidate cell;

[0008] The system receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the following: a target handover cell among at least one candidate cell, a target reporting configuration among at least one reporting configuration, and a target CSI-RS among the CSI-RS associated with at least one reporting configuration;

[0009] According to the cell handover signaling, the second network device sends Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device; the second network device corresponds to the target handover cell.

[0010] This disclosure also provides a channel state information transmission method, applied to a first network device, including:

[0011] Send at least one reporting configuration to the terminal; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell;

[0012] The terminal is sent cell handover signaling; the cell handover signaling is used to determine at least one of the following: the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0013] This disclosure also provides a channel state information transmission method, applied to a second network device, including:

[0014] The receiving terminal sends the CSI corresponding to the target reporting configuration and the target CSI-RS according to the cell handover signaling;

[0015] The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell.

[0016] The second network device corresponds to the target handover cell.

[0017] This disclosure also provides a channel state information transmission device, which is a terminal and includes a memory, a transceiver, and a processor.

[0018] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0019] The transceiver receives at least one reporting configuration sent by the first network device; each reporting configuration is associated with at least one Channel State Information Reference Signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell.

[0020] The transceiver receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0021] According to the cell handover signaling, the transceiver sends Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device; the second network device corresponds to the target handover cell.

[0022] This disclosure also provides a channel state information transmission device, which is a first network device, including a memory, a transceiver, and a processor.

[0023] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0024] The transceiver sends at least one reporting configuration to the terminal; each reporting configuration is associated with at least one CSI-RS and corresponds to at least one candidate cell.

[0025] The transceiver sends cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the following: the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0026] This disclosure also provides a channel state information transmission device, which is a second network device, including a memory, a transceiver, and a processor.

[0027] A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations:

[0028] Through the transceiver, the receiving terminal receives the CSI corresponding to the target reporting configuration and the target CSI-RS, which is sent according to the cell handover signaling.

[0029] The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell.

[0030] The second network device corresponds to the target handover cell.

[0031] This disclosure also provides a channel state information transmission device, applied to a terminal, comprising:

[0032] The first receiving unit is configured to receive at least one reporting configuration sent by the first network device; each reporting configuration is associated with at least one Channel State Information Reference Signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell.

[0033] The second receiving unit is configured to receive cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the following: a target handover cell in at least one candidate cell, a target reporting configuration in at least one reporting configuration, and a target CSI-RS in the CSI-RS associated with at least one reporting configuration.

[0034] The first transmitting unit is configured to transmit Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling; the second network device corresponds to the target handover cell.

[0035] This disclosure also provides a channel state information transmission device, applied to a first network device, comprising:

[0036] The third sending unit is used to send at least one reporting configuration to the terminal; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell;

[0037] The fourth sending unit is used to send cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0038] This disclosure also provides a channel state information transmission device, applied to a second network device, comprising:

[0039] The sixth receiving unit is used to receive the CSI corresponding to the target reporting configuration and the target CSI-RS sent by the terminal according to the cell handover signaling;

[0040] The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell.

[0041] The second network device corresponds to the target handover cell.

[0042] This disclosure also provides a non-transiently readable storage medium storing a program for causing a processor to execute the channel state information transmission method described above for the terminal side, the first network device side, or the second network device side.

[0043] This disclosure also provides a chip including a processor coupled to a memory for executing a computer program or instructions stored in the memory. When the processor executes the computer program or instructions, the aforementioned channel state information transmission method on the terminal side, the first network device side, or the second network device side is executed.

[0044] The beneficial effects of the above-mentioned technical solution disclosed herein are as follows:

[0045] In the above scheme, the channel state information transmission method involves receiving at least one reporting configuration sent by a first network device; each reporting configuration is associated with at least one channel state information reference signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell; receiving cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell among the at least one candidate cell, the target reporting configuration in the at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; and, based on the cell handover signaling, sending a method to a second network device based on the target CSI-RS. The system reports the channel state information (CSI) corresponding to the target CSI-RS; the second network device corresponds to the target handover cell; it can support starting CSI measurement before the cell handover is completed, so as to ensure that the network device can obtain the terminal's current CSI as soon as possible in the cell handover scenario (for example, obtain the terminal's current CSI during the cell handover process), and then use the MCS level that matches the channel as early as possible after the cell handover is completed, so as to shorten or avoid the time of using the lowest MCS level for data scheduling, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in cell handover scenarios in related technologies. Attached Figure Description

[0046] Figure 1 is a schematic diagram of the wireless communication system architecture according to an embodiment of this disclosure;

[0047] Figure 2 is a schematic flowchart of an information transmission method according to an embodiment of this disclosure;

[0048] Figure 3 is a schematic flowchart of the information transmission method according to an embodiment of this disclosure;

[0049] Figure 4 is a schematic flowchart of the information transmission method according to an embodiment of this disclosure;

[0050] Figure 5 is a schematic diagram of the CSI reporting configuration method according to an embodiment of this disclosure;

[0051] Figure 6 is a schematic diagram of the CSI reporting configuration method according to an embodiment of this disclosure;

[0052] Figure 7 is a schematic diagram of a CSI-related information method according to an embodiment of this disclosure;

[0053] Figure 8 is a schematic diagram of a second method for CSI-related information according to an embodiment of this disclosure;

[0054] Figure 9 is a schematic diagram of the CSI reporting configuration method according to an embodiment of this disclosure;

[0055] Figure 10 is a schematic diagram of cell handover signaling according to an embodiment of this disclosure;

[0056] Figure 11 illustrates two different methods for CSI-related information in this disclosure.

[0057] Figure 12 is a schematic diagram of a second method for CSI-related information in an embodiment of this disclosure.

[0058] Figure 13 is a schematic diagram of the structure of an information transmission device according to an embodiment of this disclosure;

[0059] Figure 14 is a schematic diagram of the information transmission device structure according to an embodiment of this disclosure;

[0060] Figure 15 is a schematic diagram of the structure of the information transmission device according to an embodiment of this disclosure;

[0061] Figure 16 is a schematic diagram of the information transmission device structure according to an embodiment of this disclosure;

[0062] Figure 17 is a schematic diagram of the information transmission device structure according to an embodiment of this disclosure;

[0063] Figure 18 is a schematic diagram of the structure of the information transmission device according to an embodiment of this disclosure;

[0064] Figure 19 is a schematic diagram of the chip system structure according to an embodiment of this disclosure. Detailed Implementation

[0065] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0066] In this disclosure, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0067] In this disclosure, the term "multiple" refers to two or more, and other quantifiers are similar.

[0068] It should be noted that the technical solutions provided in this disclosure are applicable to a variety of systems. For example, applicable systems may include Global System for Mobile Communication (GSM), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS), Long Term Evolution (LTE), LTE Frequency Division Duplex (FDD), LTE Time Division Duplex (TDD), Long Term Evolution Advanced (LTE-A), Universal Mobile Telecommunications System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX), 5th Generation Mobile Communication Technology (5G) New Radio (NR) and its evolution, and 6th Generation Mobile Communication Technology (6G), etc. All of these systems include terminal equipment and network equipment. The system may also include a core network component, such as the Evolved Packet System (EPS) or the 5G system (5GS).

[0069] Figure 1 shows a block diagram of a wireless communication system applicable to embodiments of the present disclosure. The wireless communication system includes a terminal device (which may be simply referred to as a terminal) and a network device.

[0070] The terminal devices involved in the embodiments of this disclosure can be devices that provide voice and / or data connectivity to users, handheld devices with wireless connectivity, or other processing devices connected to a wireless modem. The names of the terminal devices may differ in different systems; for example, in 5G or 6G systems, the terminal device may be called User Equipment (UE). Wireless terminal devices can be USB storage devices, other personal computer memory devices, and dongles. They can also communicate with one or more core networks (CNs) via a Radio Access Network (RAN). Wireless terminal devices can be mobile terminal devices, such as mobile phones (or "cellular" phones) and computers with mobile terminal devices. For example, they can be portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile devices that exchange voice and / or data with the radio access network. Examples of such devices include Personal Communication Service (PCS) telephones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), personal computers, tablets, and Machine-type Communication (MTC) terminal devices. Wireless terminal devices can also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile devices, remote stations, access points, remote terminals, access terminals, user terminals, user agents, user devices, and wireless access devices and routers / modems that meet the limitations of this definition, but are not limited to these in the embodiments of this disclosure.

[0071] The network device involved in this disclosure can be a base station, which may include multiple cells providing services to terminals. Depending on the specific application, the base station may also be called an access point, or a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless terminal device and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network equipment involved in this disclosure can be a base transceiver station (BTS) in a Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA) system, a NodeB in a wide-band Code Division Multiple Access (WCDMA) system, an evolved Node B (eNB or e-NodeB) in a long term evolution (LTE) system, a 5G base station (gNB) in a next generation system, a Home evolved Node B (HeNB), a relay node, a femto, a pico, network testing equipment, etc., and is not limited in this disclosure. In some network structures, the network equipment may include centralized unit (CU) nodes and distributed unit (DU) nodes, and the centralized unit and distributed unit may be geographically separated.

[0072] Network devices and terminal devices can each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission. MIMO transmission can be Single User MIMO (SU-MIMO) or Multiple User MIMO (MU-MIMO). Depending on the configuration and number of antenna combinations, MIMO transmission can be 2D MIMO, 3D MIMO, Full Dimension MIMO (FD-MIMO), or Massive MIMO, or it can be diversity transmission, pre-coded transmission, or beamforming transmission, etc.

[0073] The following is a description of the solutions provided in the embodiments of this disclosure.

[0074] When a terminal moves from the coverage area of ​​one cell to another, a handover of the serving cell is required. The current mobility scheme (L1 / L2 Triggered Mobility (LTM)) achieves the handover of the serving cell through L1 / L2 (i.e., L1 or L2) signaling, thereby reducing latency, overhead and downtime.

[0075] Currently, the cell handover process involves the target cell directly using the lowest MCS level for data scheduling after the handover is complete, followed by CSI status acquisition to obtain the terminal's current channel state information, and then using an MCS level matched to the channel for data scheduling. Therefore, the target cell cannot currently obtain the terminal's current channel state information during the handover process, resulting in degraded data transmission performance.

[0076] Based on the above, this disclosure provides a channel state information transmission method, apparatus, device, and storage medium to address the problem of data transmission performance degradation during cell handover scenarios in related technologies. The method, apparatus, device, and storage medium are based on the same application concept. Since the principles underlying the problem-solving of the method, apparatus, device, and storage medium are similar, their implementations can be referred to interchangeably, and repeated details will not be elaborated further.

[0077] The channel state information transmission method provided in this disclosure, applied to a terminal, as shown in Figure 2, includes:

[0078] Step 21: Receive at least one reporting configuration sent by the first network device; one of the reporting configurations is associated with at least one Channel State Information Reference Signal (CSI-RS), and one of the reporting configurations corresponds to at least one candidate cell;

[0079] Step 22: Receive cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0080] Step 23: According to the cell handover signaling, send the Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device; the second network device corresponds to the target handover cell.

[0081] The first network device can be the network device where the serving cell of the terminal is located, and the second network device can be the network device where the target cell (i.e. the target handover cell) of the terminal is located. The first network device and the second network device can be the same network device or different network devices (i.e., the second network device and the first network device are the same or different network devices).

[0082] And / or, the “at least one candidate cell” in step 22 may include: the at least one candidate cell corresponding to the reported configuration in step 21, and may also include other candidate cells, which are not limited here;

[0083] And / or, step 23 may include: according to the cell handover signaling, at the same time as or before sending the RRC reconfiguration completion message, sending the Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device; in this way, the network side can perform scheduling based on the CSI after the cell handover is completed, directly avoiding the use of the lowest MCS level for scheduling; however, this scheme can also send the CSI after the RRC reconfiguration completion message. Since the CSI measurement timing is advanced (measurement starts before the handover is completed), the timing when the network obtains the CSI will also be advanced, which can shorten the time of using the lowest MCS level;

[0084] And / or, in this scheme, when the terminal receives the cell handover signaling, the CSI measurement may be completed or not. Different CSI acquisition operations can be performed on this, such as starting measurement or continuing measurement, or acquiring it from the CSI that has been obtained.

[0085] And / or, the reported configuration and cell handover signaling in this scheme can be transmitted together, and do not necessarily have to be transmitted in the order specified in steps 21 and 22. This is not limited here.

[0086] This solution allows CSI measurements to begin before cell handover is complete; specifically, measurements can begin before or after receiving cell handover signaling. This is earlier than the current method of starting measurements after cell handover is complete, allowing the network to obtain CSI data earlier so that corresponding scheduling can be performed sooner.

[0087] As described above, the channel state information transmission method provided in this embodiment of the present disclosure receives at least one reporting configuration sent by a first network device; each reporting configuration is associated with at least one channel state information reference signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell; receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell among the at least one candidate cell, the target reporting configuration among the at least one reporting configuration, and the target CSI-RS among the at least one reporting configuration associated with the at least one reporting configuration; and sends a method to a second network device according to the cell handover signaling. The target reports the configuration and the Channel State Information (CSI) corresponding to the target CSI-RS; the second network device corresponds to the target handover cell; it can support starting CSI measurement before the cell handover is completed, so as to ensure that the network device can obtain the terminal's current CSI as soon as possible in the cell handover scenario (for example, obtain the terminal's current CSI during the cell handover process), and then use the MCS level that matches the channel as early as possible after the cell handover is completed, so as to shorten or avoid the time of using the lowest MCS level for data scheduling, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in cell handover scenarios in related technologies.

[0088] Regarding a solution for initiating CSI measurements during cell handover signaling, the following example can be implemented:

[0089] Example 1: Before receiving the cell handover signaling sent by the first network device, the method further includes: receiving a first signaling sent by the first network device, wherein the first signaling is used to activate the first Transmission Configuration Indication (TCI) state of the candidate cell and trigger the terminal to perform CSI-RS measurement; and performing CSI-RS measurement for the first TCI state associated with the candidate cell according to the first signaling. This allows for CSI measurement to be performed in advance based on the first signaling.

[0090] In some embodiments, before receiving the cell handover signaling sent by the first network device, the method further includes: receiving a Physical Downlink Control Channel (PDCCH) command signaling sent by the first network device; determining a first candidate cell among the candidate cells corresponding to the PDCCH command signaling; and measuring the CSI-RS associated with the first TCI state in the candidate cell according to the first signaling, which includes: measuring the CSI-RS associated with the first TCI state in the first candidate cell according to the first signaling. This can limit the scope of advance measurement.

[0091] Example 2, before receiving the cell handover signaling sent by the first network device, further includes: receiving a second signaling sent by the first network device, the second signaling being used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; and performing measurement on the semi-persistent CSI-RS according to the second signaling; wherein the semi-persistent CSI-RS includes at least one of the following: (1) a set of CSI-RS of a candidate cell or at least one CSI-RS of a candidate cell; (2) at least one set of CSI-RS, the set of CSI-RS containing at least two CSI-RS of the candidate cells; and (3) at least two CSI-RS of at least two candidate cells. This allows for CSI measurement to be performed in advance according to the second signaling.

[0092] The second signaling can also be used to activate the second TCI state of the candidate cell; or, the second signaling can be a PDCCH command signaling. This can further increase the functionality of the second signaling, or be understood as using more methods of second signaling to achieve early measurement of CSI.

[0093] In this embodiment of the disclosure, the cell handover signaling includes a target configuration identifier and a TCI status identifier; the channel state information transmission method further includes: determining a target handover cell among at least one candidate cell based on the target configuration identifier; determining a target reporting configuration among the at least one reporting configuration and a target CSI-RS among the CSI-RS associated with the at least one reporting configuration based on the target handover cell and the target TCI status corresponding to the TCI status identifier; wherein, the target reporting configuration corresponds to the target handover cell, the target CSI-RS is associated with the target reporting configuration, and the target CSI-RS is configured with the target TCI status or is quasi-co-located with the target TCI status. This enables the terminal to report the CSI of the target handover cell.

[0094] In some embodiments, before sending the Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling, the method further includes: (1) starting to measure the target CSI-RS according to the target reporting configuration; or, (2) continuing to measure the target CSI-RS according to the target reporting configuration and stopping the measurement of other CSI-RSs besides the target CSI-RS; or, (3) obtaining the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSIs; wherein the target reporting configuration and the target CSI-RS are determined according to the cell handover signaling. This allows for multiple methods to obtain the CSI of the target handover cell.

[0095] The cell handover signaling is used to instruct the target handover cell to transmit semi-persistent CSI-RS; the step of starting to measure the target CSI-RS according to the target reporting configuration includes: starting to measure the semi-persistent CSI-RS transmitted by the target handover cell according to the target reporting configuration; the semi-persistent CSI-RS includes the target CSI-RS. This supports the specific implementation of target CSI-RS measurement.

[0096] In this embodiment of the disclosure, the cell handover signaling includes at least one of a reporting configuration indication and a CSI-RS resource indication. Before sending Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling, the method further includes: determining the target reporting configuration in the at least one reporting configuration according to the target handover cell and the reporting configuration indication; determining the target CSI-RS in the CSI-RS associated with the at least one reporting configuration according to the CSI-RS resource indication; or, determining the target CSI-RS according to the target reporting configuration and the target TCI state; wherein the target TCI state is the TCI state corresponding to the TCI state identifier carried in the cell handover signaling. This can support the direct or indirect determination of the target reporting configuration and the target CSI-RS. The target CSI-RS may be associated with the target reporting configuration and may be configured with the target TCI state or quasi-co-located with the target TCI state, but is not limited thereto.

[0097] The cell handover signaling includes a CSI reporting offset indication. This allows the terminal to determine the CSI reporting resource based on the offset indication, such as the first Physical Uplink Shared Channel (PUSCH) resource after the reporting offset, which is not limited here.

[0098] In this embodiment of the disclosure, sending Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling includes: sending the CSI to the second network device on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling. This supports specific implementations of CSI reporting; wherein, the uplink resources determined according to the cell handover signaling may include, but are not limited to, the uplink resources determined according to the reporting offset indication.

[0099] In some embodiments, the channel state information transmission method further includes: sending at least one of CSI availability indication information and CSI request information to the second network device; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, and / or, to request time information for the uplink resources for transmitting the CSI; wherein the CSI availability indication information is sent together with the CSI or sent separately. This can support reporting to the network side whether the current CSI is valid and at least one of the expected reporting resources and / or time of the CSI.

[0100] Sending the CSI includes: sending the CSI based on the uplink resources or time information requested by the CSI request information. This allows the network side to accurately obtain the CSI.

[0101] In this embodiment of the disclosure, one or more predefined uplink resources of the system become invalid after a valid CSI is sent. This helps to avoid resource waste.

[0102] This disclosure also provides a channel state information transmission method, applied to a first network device, as shown in Figure 3, including:

[0103] Step 31: Send at least one reporting configuration to the terminal; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell;

[0104] Step 32: Send cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with at least one reporting configuration.

[0105] The channel state information transmission method provided in this disclosure sends at least one reporting configuration to the terminal; each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell; cell handover signaling is sent to the terminal; the cell handover signaling is used to determine at least one of the target handover cell among the at least one candidate cell, the target reporting configuration among the at least one reporting configuration, and the target CSI-RS among the CSI-RS associated with the at least one reporting configuration; it can support starting CSI measurement before the cell handover is completed, so as to ensure that the network device can obtain the terminal's current CSI as soon as possible in the cell handover scenario (e.g., obtain the terminal's current CSI during the cell handover process), and then, after the cell handover is completed, data scheduling can be performed as early as possible using the MCS level that matches the channel, so as to shorten or avoid the time of data scheduling using the lowest MCS level, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in the cell handover scenario in related technologies.

[0106] Regarding a solution for initiating CSI measurements during cell handover signaling, the following example can be implemented:

[0107] Example 1: Before sending cell handover signaling to the terminal, the method further includes sending a first signaling message to the terminal. This first signaling message is used to activate the first TCI state of the candidate cell and trigger the terminal to perform CSI-RS measurement. This allows the terminal to perform CSI measurement in advance based on the first signaling message.

[0108] In some embodiments, before sending cell handover signaling to the terminal, the method further includes: sending PDCCH command signaling to the terminal; the PDCCH command signaling is used by the terminal to determine a first candidate cell among the candidate cells. This allows the terminal to narrow down the range of advance measurements.

[0109] Example 2, before sending cell handover signaling to the terminal, further includes: sending a second signaling to the terminal, the second signaling being used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; wherein the semi-persistent CSI-RS includes at least one of the following: (1) a set of CSI-RS of a candidate cell or at least one CSI-RS of a candidate cell; (2) at least one set of CSI-RS, the set of CSI-RS containing at least two CSI-RS of the candidate cells; (3) at least two CSI-RS of at least two candidate cells. This allows the terminal to perform CSI measurement in advance according to the second signaling.

[0110] The second signaling is further used to activate the second TCI state of the candidate cell; or, the second signaling is a PDCCH command signaling. This can further increase the functionality of the second signaling, or be understood as using more methods of second signaling to achieve early measurement of CSI.

[0111] In this embodiment of the disclosure, the cell handover signaling includes a target configuration identifier and a TCI status identifier; the target configuration identifier and the TCI status identifier are used by the terminal to determine the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration. This enables the terminal to report the CSI of the target handover cell.

[0112] In some embodiments, the cell handover signaling is further used to trigger the terminal to perform: (1) starting to measure the target CSI-RS according to the target reporting configuration; or, (2) continuing to measure the target CSI-RS according to the target reporting configuration, and stopping the measurement of other CSI-RS besides the target CSI-RS; or, (3) obtaining the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSIs; wherein the target reporting configuration and the target CSI-RS are determined according to the cell handover signaling. This allows the terminal to obtain the CSI of the target handover cell in multiple ways.

[0113] The cell handover signaling is used to instruct the target handover cell to transmit semi-persistent CSI-RS; the step of starting to measure the target CSI-RS according to the target reporting configuration includes: starting to measure the semi-persistent CSI-RS transmitted by the target handover cell according to the target reporting configuration; the semi-persistent CSI-RS includes the target CSI-RS. This allows the terminal to specifically implement the measurement of the target CSI-RS.

[0114] In this embodiment of the disclosure, the cell handover signaling includes at least one of a reporting configuration indication and a CSI-RS resource indication. This allows for the direct or indirect determination of the target reporting configuration and the target CSI-RS.

[0115] The cell handover signaling includes a CSI reporting offset indication. This allows the terminal to determine the CSI reporting resources based on the offset indication. Alternatively, the cell handover signaling may include at least one of a reporting configuration indication, a CSI-RS resource indication, and a CSI reporting offset indication; this is not limited to this specific implementation.

[0116] This disclosure also provides a channel state information transmission method, applied to a second network device, as shown in FIG4, including:

[0117] Step 41: The receiving terminal sends a CSI corresponding to the target reporting configuration and the target CSI-RS according to the cell handover signaling; wherein, the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell; the second network device corresponds to the target handover cell.

[0118] The target cell performs signal transmissions corresponding to the terminal side (such as signal transmissions corresponding to the first signaling, PDCCH command signaling, and the second signaling) so that the terminal can perform measurements to obtain CSI. This will not be elaborated further here.

[0119] The channel state information transmission method provided in this embodiment receives a CSI corresponding to a target reporting configuration and a target CSI-RS sent by a terminal according to cell handover signaling. The cell handover signaling is used to determine at least one of the target handover cell among at least one candidate cell, a target reporting configuration among at least one reporting configuration, and a target CSI-RS among the CSI-RS associated with the at least one reporting configuration. Each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell. The second network device corresponds to the target handover cell. This method supports starting CSI measurement before cell handover is completed, ensuring that the network device obtains the terminal's current CSI as quickly as possible in cell handover scenarios (e.g., obtaining the terminal's current CSI during cell handover). This allows for early data scheduling using an MCS level matching the channel after cell handover, minimizing or avoiding the time required for data scheduling using the lowest MCS level, thereby improving data transmission performance to some extent and solving the problem of data transmission performance degradation in cell handover scenarios in related technologies.

[0120] The cell handover signaling is used to instruct the target handover cell to perform semi-persistent CSI-RS transmission. This clarifies the transmission of relevant signals.

[0121] In this embodiment of the disclosure, the cell handover signaling includes: a CSI reporting offset indication. This supports explicit terminal reporting of CSI reporting resources.

[0122] The CSI transmitted by the receiving terminal according to the cell handover signaling, corresponding to the target reporting configuration and the target CSI-RS, includes: the CSI transmitted by the receiving terminal on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling. This allows the terminal to specifically implement CSI reporting.

[0123] In some embodiments, the channel state information transmission method further includes: receiving at least one of CSI availability indication information and CSI request information sent by a terminal; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI; wherein the CSI availability indication information is sent together with the CSI or sent separately. This allows the terminal to report to the network side whether the current CSI is valid and at least one of the expected uplink resources and / or time for the CSI.

[0124] In this embodiment of the disclosure, the channel state information transmission method further includes: feeding back the uplink resources or the time information to the terminal according to the CSI request information; wherein receiving the CSI includes: receiving the CSI sent by the terminal according to the uplink resources or the time information. This allows the network side to accurately obtain the CSI.

[0125] In some embodiments, the channel state information transmission method further includes: stopping the transmission of CSI-RS after receiving a valid CSI. This helps avoid wasting resources.

[0126] Specifically, one or more predefined uplink resources in the system become invalid after a valid CSI is received. This further helps to avoid resource waste.

[0127] It should be noted that the relevant content on the terminal side, the first network device side, and the second network device side can be referred to each other, and the repeated parts will not be repeated.

[0128] The channel state information transmission method provided in the embodiments of this disclosure will be illustrated below with examples, using a base station as an example of a network device.

[0129] To address the aforementioned technical problems, this disclosure provides a channel state information (CSI) transmission method, which can also be understood as a CSI reporting method. Specifically, it can be implemented as a target cell CSI reporting method during cell handover. The method mainly involves: configuring Channel State Information Reference Signal (CSI-RS) measurement resources and CSI reporting configurations (which can correspond to the aforementioned reporting configurations; each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell) for multiple candidate cells. Advance measurement (relative to the reception time of the cell handover signaling) is activated via signaling (such as the first, second, and third signaling described below). Reporting can also be triggered in conjunction with the cell handover signaling (the cell handover signaling can also trigger non-advance measurement (relative to the reception time of the cell handover signaling)). The terminal can determine the reporting resources for CSI reporting based on the cell handover signaling or a predefined method, thereby supporting the implementation of radio resource control (RFI) during cell handover. Before or simultaneously with the RRC complete message, the target cell (i.e., the target handover cell) can obtain the terminal's channel state information, rather than only after the RRC complete message. This ensures that the terminal can immediately use the acquired channel state information for data scheduling after cell handover, guaranteeing transmission performance. The first, second, and third signaling instructions described below are all transmitted before the cell handover signaling, ensuring that the terminal begins measuring the target channel state information before cell handover and supports reporting the channel state information before or simultaneously with the RRC complete message. In summary, through this scheme, the terminal can obtain the target cell's channel state information in advance and notify the target cell, thereby ensuring data transmission performance after cell handover.

[0130] The following is a detailed introduction to the contents of this plan.

[0131] I. Terminal side:

[0132] 1) Receive N reporting configurations indicated by the network side, each reporting configuration being associated with one or more CSI-RS resources for channel state information acquisition (which may correspond to at least one reporting configuration sent by the first network device mentioned above; one of the reporting configurations is associated with at least one channel state information reference signal (CSI-RS); the N reporting configurations include any of the following:

[0133] a) Each of the N reporting configurations corresponds to a candidate cell, and the CSI-RS resources associated with each reporting configuration belong to the same candidate cell;

[0134] b) Each of the N reporting configurations corresponds to multiple candidate cells, and the CSI-RS resources associated with each reporting configuration belong to multiple candidate cells;

[0135] Where N is an integer greater than or equal to 1; corresponding to one of the above-mentioned reporting configurations is at least one candidate cell.

[0136] The system receives cell handover signaling sent by the network side, the cell handover signaling being used to determine at least one of the target handover cell, the target reporting configuration, and the target CSI-RS resource; this may correspond to the above-mentioned receiving cell handover signaling sent by the first network device; the cell handover signaling being used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in the at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0137] The terminal sends the CSI information determined by the target reporting configuration to the target handover cell; corresponding to the above-mentioned channel state information (CSI) based on the target reporting configuration and the target CSI-RS sent to the second network device according to the cell handover signaling; the second network device corresponds to the target handover cell. The terminal can also send an RRC reconfiguration complete message to the target handover cell. This message can be sent separately from the CSI, or it can carry the CSI (i.e., sent together with the CSI); the CSI can be sent before this message, which is not limited here.

[0138] 2) The terminal described in 1) may also receive a first signaling sent by the network side, the signaling being used to trigger the terminal to perform CSI-RS measurement; the first signaling may be a signaling to activate the TCI state of a candidate cell; after receiving the first signaling, the terminal begins to measure the CSI-RS resources associated with the activated Transmission Configuration Indication (TCI) state of the corresponding candidate cell (corresponding to the first signaling); corresponding to the above, before receiving the cell handover signaling sent by the first network device, it may further include: receiving the first signaling sent by the first network device, the first signaling being used to activate the first transmission configuration indication (TCI) state of the candidate cell and trigger the terminal to perform CSI-RS measurement; according to the first signaling, measuring the CSI-RS associated with the first TCI state in the candidate cell.

[0139] 3) The terminal described in 1) may also receive both a first signaling and a third signaling; the first signaling may be signaling to activate the TCI state of a candidate cell; the third signaling may be Physical Downlink Control Channel (PDCCH) order signaling; the terminal measures the CSI-RS resources associated with the activated TCI state in the candidate cell corresponding to the PDCCH order signaling; corresponding to the above, before receiving the cell handover signaling sent by the first network device, it may further include: receiving the Physical Downlink Control Channel (PDCCH) order signaling sent by the first network device; determining the first candidate cell in the candidate cells corresponding to the PDCCH order signaling; the measurement of the CSI-RS associated with the first TCI state in the candidate cell according to the first signaling includes: measuring the CSI-RS associated with the first TCI state in the first candidate cell according to the first signaling.

[0140] 4) The terminal described in 1) may also receive a second signaling sent by the network side; the second signaling may be signaling to activate semi-persistent CSI-RS transmission, and the activation operation may include at least one of the following:

[0141] a) Activate the CSI-RS resource set of a candidate cell or one or more CSI-RS resources of a candidate cell; the semi-persistent CSI-RS described above may include: the CSI-RS set of the candidate cell or at least one CSI-RS of the candidate cell;

[0142] b) Activate one or more CSI-RS resource sets, wherein the CSI-RS resource sets contain CSI-RS resources of multiple candidate cells; the semi-persistent CSI-RS described above may include: at least one CSI-RS set, wherein the CSI-RS set contains CSI-RS of at least two of the candidate cells;

[0143] c) Activate multiple CSI-RS resources of multiple candidate cells; which may correspond to the semi-persistent CSI-RS mentioned above include: at least two CSI-RS of at least two candidate cells.

[0144] After receiving the second signaling, the terminal begins to measure the semi-persistent CSI-RS activated by this signaling; this can correspond to receiving the second signaling sent by the first network device, whereby the second signaling is used to activate the semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; and the terminal performs measurement for the semi-persistent CSI-RS according to the second signaling.

[0145] The second signaling may also be signaling used to activate the TCI state of the candidate cell or PDCCH command signaling; it may also correspond to the second signaling used to activate the second TCI state of the candidate cell; or, the second signaling may be PDCCH command signaling.

[0146] 5) The terminal in 1) receives cell handover signaling sent by the network side; the cell handover signaling may include a target configuration identifier (ID) and a TCI status ID; the cell handover signaling may be used by the terminal to determine the target reporting configuration and the target CSI-RS resources, and may also trigger the terminal to start measuring the target CSI-RS resources. The target configuration ID can be used to determine the target cell; the target reporting configuration and target CSI-RS resource (which corresponds to the target TCI) can be determined based on the configuration of the target cell; the cell handover signaling can correspond to the target configuration identifier and TCI status identifier; the channel state information transmission method further includes: determining the target handover cell among at least one candidate cell based on the target configuration identifier; determining the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration based on the target handover cell and the target TCI status corresponding to the target TCI status identifier; wherein the target reporting configuration corresponds to the target handover cell, the target CSI-RS is associated with the target reporting configuration, and the target CSI-RS is configured with the target TCI status or is quasi-co-located with the target TCI status.

[0147] In this scheme, after determining the target CSI-RS resource, if the measurement has been completed, it can be reported directly; if it has not been completed, the measurement can continue and other measurements can be stopped; or the target CSI-RS resource can be determined and measurement can begin (in the absence of the aforementioned first signaling, second signaling, and third signaling). This operation can correspond to the above, before sending the Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling, it further includes: starting to measure the target CSI-RS according to the target reporting configuration; or, continuing to measure the target CSI-RS according to the target reporting configuration and stopping the measurement of other CSI-RS besides the target CSI-RS; or, obtaining the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSIs; wherein, the target reporting configuration and the target CSI-RS are determined according to the cell handover signaling.

[0148] 6) The cell handover signaling described in 5) may further include one or more of the following: a reporting configuration indication, a CSI-RS resource indication, and a reporting offset indication. The reporting configuration indication and the CSI-RS resource indication may also be used separately from the "target configuration ID and TCI status ID" to determine the target reporting configuration and the target CSI-RS resource; this may correspond to the above cell handover signaling including at least one of the following: a reporting configuration indication and a CSI-RS resource indication; before sending the Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling, the signaling further includes: determining the target reporting configuration in the at least one reporting configuration based on the target handover cell and the reporting configuration indication; determining the target CSI-RS in the CSI-RS associated with the at least one reporting configuration based on the CSI-RS resource indication; or, determining the target CSI-RS based on the target reporting configuration and the target TCI status; the target TCI status is the TCI status corresponding to the TCI status identifier carried in the cell handover signaling. The cell handover signaling includes: the CSI reporting offset indication.

[0149] 7) The cell handover signaling described in 5) or 6) can also be used to trigger the target handover cell to transmit semi-persistent CSI-RS resources (which can notify the UE related cells to transmit signals) and trigger the terminal to start measuring the semi-persistent CSI-RS resources; it can correspond to the above cell handover signaling used to instruct the target handover cell to transmit semi-persistent CSI-RS; the step of starting to measure the target CSI-RS according to the target reporting configuration includes: starting to measure the semi-persistent CSI-RS transmitted by the target handover cell according to the target reporting configuration; the semi-persistent CSI-RS includes the target CSI-RS (i.e., including the target CSI-RS resources in 5).

[0150] 8) For any of 2)-4) and 5), after receiving the cell handover signaling sent by the network side, the terminal may only measure the target CSI-RS resource in 5) and stop measuring other CSI-RS resources; or it may continue to measure the target CSI-RS according to the target reporting configuration as described above, and stop measuring other CSI-RSs except the target CSI-RS.

[0151] 9) As described in 5) or 6), after receiving the cell handover signaling, the terminal can report CSI on system-predefined uplink resources or uplink resources determined according to the cell handover signaling (including resources determined according to the reporting offset indication); corresponding to the above, the terminal can send the CSI to the second network device on one or more system-predefined uplink resources or uplink resources determined according to the cell handover signaling. In this scheme, CSI reporting may also be performed without completing the measurement, such as reporting on system-predefined uplink resources.

[0152] 10) The CSI reporting described in 9) may include at least one of a CSI availability indication field and a CSI request field; the CSI availability indication field may be used to indicate whether the current CSI (e.g., CSI 1) is valid; the CSI request field may be used to request uplink resources for transmitting the CSI, or to request time information for transmitting the uplink resources of the CSI; this may correspond to sending at least one of the CSI availability indication information and CSI request information to the second network device as described above; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for transmitting the uplink resources of the CSI; wherein, the CSI availability indication information may be sent together with the CSI or sent separately. These two pieces of information may be carried in the CSI field, but are not limited thereto.

[0153] 11) The terminal can report a valid CSI (such as the CSI in 1) based on the uplink resources or time information of the CSI uplink resources described in 10); the terminal can send the CSI corresponding to the uplink resources or time information requested based on the CSI request information. One or more uplink resources predefined by the system may become invalid after the valid CSI is sent, but this is not a limitation.

[0154] II. Base station side (the serving cell and the target cell are not necessarily located on the same base station):

[0155] 1) The network side instructs N reporting configurations, each reporting configuration being associated with one or more CSI-RS resources for obtaining channel state information (which may correspond to sending at least one reporting configuration to the terminal as described above; one reporting configuration is associated with at least one CSI-RS); the N reporting configurations include any of the following:

[0156] a) Each of the N reporting configurations corresponds to a candidate cell, and the CSI-RS resources associated with each reporting configuration belong to the same candidate cell;

[0157] b) Each of the N reporting configurations corresponds to multiple candidate cells, and the CSI-RS resources associated with each reporting configuration belong to multiple candidate cells;

[0158] Where N is an integer greater than or equal to 1; corresponding to one of the above-mentioned reporting configurations is at least one candidate cell.

[0159] The network side sends cell handover signaling, which is used to determine the target handover cell, and at least one of the target reporting configuration and the target CSI-RS resource; this can correspond to sending cell handover signaling to the terminal as described above; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in the at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0160] The target handover cell receives CSI information and / or CSI availability indication determined based on the target reporting configuration sent by the receiving terminal; this may correspond to the CSI sent by the receiving terminal according to the cell handover signaling, which corresponds to the target reporting configuration and the target CSI-RS; wherein, the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in the at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell; the second network device corresponds to the target handover cell.

[0161] 2) Based on 1), the network side can also send a first signaling message, which is used to trigger the terminal to perform CSI-RS measurement; or, the network side can send a first signaling message and a third signaling message, which trigger the terminal to perform CSI-RS measurement based on the first signaling message and the third signaling message; the first signaling message can be a signaling message to activate the TCI state of the candidate cell; the third signaling message can be a PDCCH_order signaling message; corresponding to the above, the first signaling message is sent to the terminal, which is used to activate the first TCI state of the candidate cell and trigger the terminal to perform CSI-RS measurement; a PDCCH command signaling message is sent to the terminal; the PDCCH command signaling message is used by the terminal to determine the first candidate cell among the candidate cells.

[0162] 3) Based on 1), the network side can also send a second signaling message; the second signaling message can be a signaling message to activate semi-persistent CSI-RS transmission (which can correspond to sending the second signaling message to the terminal as described above, the second signaling message being used to activate semi-persistent CSI-RS transmission), and the activation operation can include at least one of the following:

[0163] a) Activate the CSI-RS resource set of a candidate cell or one or more CSI-RS resources of a candidate cell; the semi-persistent CSI-RS described above may include: the CSI-RS set of the candidate cell or at least one CSI-RS of the candidate cell;

[0164] b) Activate one or more CSI-RS resource sets, wherein the CSI-RS resource sets contain CSI-RS resources of multiple candidate cells; the semi-persistent CSI-RS described above may include: at least one CSI-RS set, wherein the CSI-RS set contains CSI-RS of at least two of the candidate cells;

[0165] c) Activate multiple CSI-RS resources of multiple candidate cells; which may correspond to the semi-persistent CSI-RS mentioned above include: at least two CSI-RS of at least two candidate cells.

[0166] The second signaling is also used to activate the terminal to perform semi-persistent CSI-RS measurements; it can correspond to the second signaling mentioned above being used to trigger the terminal to perform CSI-RS measurements.

[0167] The second signaling may also be signaling used to activate the TCI state of the candidate cell or PDCCH command signaling; it may also correspond to the second signaling used to activate the second TCI state of the candidate cell; or, the second signaling may be PDCCH command signaling.

[0168] 4) In step 1), the network side can send cell handover signaling; the cell handover signaling may include a target configuration ID and a TCI status ID; the cell handover signaling can be used by the terminal to determine the target reporting configuration and the target CSI-RS resource, and (can also) trigger the terminal to start measuring the target CSI-RS resource; the cell handover signaling may correspond to the above-mentioned cell handover signaling including: a target configuration identifier and a TCI status identifier; the target configuration identifier and the TCI status identifier are used by the terminal to determine the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; the cell handover signaling is also used to trigger the terminal to: start measuring the target CSI-RS according to the target reporting configuration; or, continue measuring the target CSI-RS according to the target reporting configuration and stop measuring other CSI-RSs besides the target CSI-RS; or, obtain the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSIs; wherein, the target reporting configuration and the target CSI-RS are determined according to the cell handover signaling.

[0169] 5) The cell handover signaling described in 4) may further include one or more of the following: a reporting configuration indication, a CSI-RS resource indication, and a reporting offset indication; the cell handover signaling may correspond to at least one of the following: a reporting configuration indication and a CSI-RS resource indication; the cell handover signaling includes: the reporting offset indication of the CSI.

[0170] 6) The cell handover signaling described in 4) or 5) can also be used to trigger the target handover cell to transmit semi-persistent CSI-RS resources (which can notify the UE related cells to transmit signals) and trigger the terminal to start measuring the semi-persistent CSI-RS resources; it can correspond to the above cell handover signaling used to instruct the target handover cell to transmit semi-persistent CSI-RS; the step of starting to measure the target CSI-RS according to the target reporting configuration includes: starting to measure the semi-persistent CSI-RS transmitted by the target handover cell according to the target reporting configuration; the semi-persistent CSI-RS includes the target CSI-RS (i.e., including the target CSI-RS resources in 4).

[0171] 7) For any one of 2) and 3) and any one of 4) and 5), after receiving the cell handover signaling sent by the network side, the terminal may only measure the target CSI-RS resource in 4) or 5) and stop measuring other CSI-RS resources; or it may continue to measure the target CSI-RS according to the target reporting configuration as described above and stop measuring other CSI-RSs except the target CSI-RS.

[0172] 8) Based on 1), after sending the cell handover signaling, the network side can receive the terminal's CSI report on the uplink resources predefined by the system or on the uplink resources determined according to the cell handover signaling; it can receive the CSI sent by the terminal on one or more uplink resources predefined by the system or on the uplink resources determined according to the cell handover signaling.

[0173] 9) The CSI reporting described in 8) may include at least one of a CSI availability indication field and a CSI request field; the CSI availability indication field may be used to indicate whether the current CSI (e.g., CSI 1) is valid; the CSI request field may be used to request uplink resources for transmitting the CSI; or, to request time information for transmitting the uplink resources of the CSI; it may correspond to at least one of the CSI availability indication information and CSI request information sent by the receiving terminal; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or, to request time information for transmitting the uplink resources of the CSI; wherein, the CSI availability indication information is sent together with the CSI or sent separately. These two pieces of information may be carried in the CSI field, but are not limited thereto. Furthermore, in this scheme, the CSI request field may indicate the expected reporting time of a valid CSI to notify the network side to receive it accordingly, but is not limited thereto.

[0174] 10) The network side receives a valid CSI based on the uplink resources or time information of the CSI uplink resources as described in 9); it may correspond to the above-mentioned feedback of the uplink resources or time information to the terminal based on the CSI request information; wherein, receiving the CSI includes: receiving the CSI sent by the terminal based on the uplink resources or time information.

[0175] 11) After receiving a valid CSI, the network side stops transmitting semi-persistent CSI-RS resources (i.e., stops sending CSI-RS); this corresponds to stopping sending CSI-RS after receiving a valid CSI. One or more predefined uplink resources may become invalid after receiving a valid CSI, but this is not a limitation.

[0176] The following provides specific examples illustrating the solutions provided in the embodiments of this disclosure.

[0177] Example 1:

[0178] Part 1;

[0179] Assume that the base station configures N=8 CSI reporting configurations (CSI-ReportConfig) for the terminal, each CSI reporting configuration corresponding to a candidate cell, configured in the corresponding candidate cell configuration (LTM-Candidate). The CSI-ReportConfig may also include reporting quantity indicators, such as indicating that this reporting configuration needs to complete CRI (CSI-RS Resource Indicator) - RI (Rank Indicator) - PMI (Precoding Matrix Indicator) - CQI (Channel Quality Indicator) reporting. In one implementation, a CSI reporting configuration is associated with M periodic or semi-persistent CSI-RS resources (e.g., M=4), all of which belong to this candidate cell. This embodiment takes periodic CSI-RS resources as an example, as shown in Figure 5 (CSI reporting configuration method), where periodic NZP CSI-RS (non-zero power CSI-RS) resources 1, 2, 4, and 6 all belong to this candidate cell. Assume that each NZP CSI-RS resource is configured with a TCI state. For example, NZP CSI-RS resource-1 is configured with TCI state-3, NZP CSI-RS resource-2 with TCI state-5, NZP CSI-RS resource-4 with TCI state-45, and NZP CSI-RS resource-6 with TCI state-12. In Figure 5, "LTM-Candidate ID" represents the candidate cell configuration identifier.

[0180] In another implementation, as shown in Figure 6, the CSI reporting configuration method is as follows: a CSI reporting configuration (CSI-ReportConfig) is associated with a CSI-RS resource set (CSI-ResourceSet), and the periodic NZP CSI-RS resources (NZP CSI-RS resource-1, NZP CSI-RS resource-2, NZP CSI-RS resource-3, NZP CSI-RS resource-4) contained in this CSI-RS resource set all belong to this candidate cell.

[0181] Part Two;

[0182] The base station sends a TCI activation MAC-CE (Media Access Control-Control Element) signaling (which may correspond to the first signaling mentioned above) to the terminal to activate the TCI state in the candidate cells. If the terminal has the capability for early CSI measurement, it can start measuring the corresponding NZP CSI-RS resources based on the activated TCI state. Specifically, if the TCI activation MAC-CE activates TCI state-3 and TCI state-5, the terminal can start measuring NZP CSI-RS resource-1 and NZP CSI-RS resource-2; or, if the TCI activation MAC-CE activates TCI state-37, and the source reference signal of QCL (Quasi-Colocation) Type D in TCI state-37 is the same as (or has a QCL relationship with) the source reference signal of QCL Type D in TCI state-3, the terminal can start measuring NZP CSI-RS resource-1. If the terminal does not have the capability to perform advance CSI measurement, then the terminal will not perform NZP CSI-RS resource measurement.

[0183] In another implementation, the base station sends a TCI activation MAC-CE signaling to the terminal to activate the TCI state in the aforementioned candidate cells. If the terminal has the capability for advance CSI measurement, and the terminal has received a PDCCH_order signaling from the base station before this MAC-CE signaling (this signaling is used to send a preamble to the aforementioned candidate cells to obtain TA (Timing Advance)), the terminal can determine the corresponding NZP CSI-RS resources (i.e., the resources corresponding to the candidate cell that has obtained TA) based on the activated TCI state and perform measurement. If the terminal has not received a PDCCH_order signaling from the base station before this MAC-CE signaling, NZP CSI-RS resource measurement can be left unstarted until the terminal receives a PDCCH_order signaling from the base station triggering the terminal to send a PDCCH_order signaling to the candidate cell, then the TCI state of the currently activated candidate cell is determined, the NZP CSI-RS resources to be measured are identified, and measurement begins. If the terminal does not have the capability for advance CSI measurement, the terminal can choose not to perform NZP CSI-RS resource measurement.

[0184] Part Three;

[0185] The terminal receives cell handover signaling sent by the base station. In one embodiment, the cell handover signaling may include a target configuration ID and a TCI state ID. The terminal can determine the target handover cell based on the target configuration ID in the cell handover signaling. The terminal can also determine the target reporting configuration and the target CSI-RS resource based on the target handover cell and the target TCI state corresponding to the TCI state ID in the cell handover signaling. The target reporting configuration corresponds to the target handover cell; the target CSI-RS resource is associated with the target reporting configuration and configures the target TCI state, or is quasi-co-located with the target TCI state. For example, the target configuration ID points to the candidate cell shown in Figure 5, which serves as the target handover cell; simultaneously, the TCI state ID indicates that TCI state-5 is the target TCI state; then the terminal can determine that CSI-ReportConfig shown in Figure 5 is the target reporting configuration, and NZP CSI-RS resource-2 is the target CSI-RS resource. If the terminal does not have the capability to measure CSI in advance (measurement in advance relative to the handover command), the terminal can start measuring NZP CSI-RS resource-2 (which corresponds to starting to measure the target CSI-RS according to the target reporting configuration mentioned above); if the terminal has the capability to measure CSI in advance, it can retain only the measurement of NZP CSI-RS resource-2 and stop the measurement of other NZP CSI-RS resources (which corresponds to continuing to measure the target CSI-RS according to the target reporting configuration mentioned above and stopping the measurement of other CSI-RS besides the target CSI-RS).

[0186] In another embodiment, the cell handover signaling may further include one or more of a reporting configuration indication, a CSI-RS resource indication, and a reporting offset indication. The terminal can determine the target handover cell based on the target configuration ID in the cell handover signaling; based on the target handover cell, it can directly determine the target reporting configuration and the target CSI-RS resource according to the signaling indication (which may correspond to determining the target reporting configuration in the at least one reporting configuration based on the target handover cell and the reporting configuration indication; and determining the target CSI-RS in the CSI-RS associated with the at least one reporting configuration based on the CSI-RS resource indication). In some embodiments, the reporting offset indication can be used by the terminal to determine the time for CSI reporting to the target handover cell. In some embodiments, the reporting offset indication is a time offset relative to this cell handover signaling, and the terminal can perform CSI reporting on the first PUSCH (Physical Uplink Shared Channel) resource after this offset; this may correspond to sending the CSI to the second network device on the uplink resource determined according to the cell handover signaling.

[0187] Furthermore, the terminal can also feed back CSI-related information to the target handover cell on the system-predefined PUSCH resources; corresponding to the above-mentioned sending of the CSI to the second network device on one or more system-predefined uplink resources according to the cell handover signaling. In one embodiment, the system-predefined PUSCH resources can be predefined as follows, but are not limited thereto:

[0188] a) For cell handover based on contention-based random access (CBRA): the PUSCH resource can be the resource corresponding to message 5 (Msg5);

[0189] b) For cell handover based on Contention-Free Random Access (CFRA): the PUSCH resource can be the resource corresponding to message 3 (Msg3); or the resource corresponding to message 5 (Msg5);

[0190] c) For cell handover on a non-random access channel (RACH): The PUSCH resource can be the first Dynamic Grant (DG)-PUSCH resource of the target cell after the cell handover signaling, i.e., the PUSCH resource can be the first DG-PUSCH resource of the target cell (or the target cell corresponding to the target cell) after the cell handover signaling; or, the PUSCH resource can be the first Configured Grant (CG)-PUSCH resource of the target cell after the cell handover signaling, i.e., the PUSCH resource can be the first CG-PUSCH resource of the target cell (or the target cell corresponding to the target cell) after the cell handover signaling; or, the PUSCH resource can be the PUSCH resource for the terminal to report the RRC completion message; or the PUSCH resource can be the first PUSCH resource after the reporting offset indicated in the cell handover signaling.

[0191] In some embodiments, the terminal reports CSI-related information on the PUSCH resource. In one embodiment, the CSI-related information may include, as shown in Figure 7 (CSI-related information method one), a CSI availability indication field and the CSI information indicated in the CSI reporting configuration (such as CRI-RI-PMI-CQI in this embodiment). Specifically, if the terminal has completed the measurement of the NZP CSI-RS resource at the aforementioned PUSCH resource time (i.e., on the resource symbol) and obtained the CRI, RI, PMI, and / or CQI information indicated in the CSI-ReportConfig, then the CSI availability indication field can indicate 1, indicating the existence of valid CSI information; and the terminal reports this CSI information in the CSI field. Otherwise, if the terminal has not completed the measurement of the NZP CSI-RS resource at the aforementioned PUSCH resource time, then the CSI availability indication field can indicate 0, indicating no valid CSI information; the CSI field is invalid.

[0192] In one implementation, for CFRA-based cell handover, if CSI reporting is not completed on Msg3, it can be completed on Msg5, but this is not a limitation.

[0193] In another implementation, the CSI-related information can include a CSI request field and a CSI field, as shown in Figure 8 (CSI-related information method two). Specifically, the CSI request field can indicate the reporting time of (expected) valid CSI. For example, if the CSI request field indicates L=2, it means that the CSI calculation has not yet been completed, and a valid CSI can be reported after 2 time slots, at which time the CSI field is invalid; if L=0 is reported, it means that the CSI acquisition has been completed, and a valid CRI-RI-PMI-CQI is reported in the CSI field, but this is not a limitation.

[0194] Based on the above, the target handover cell receives the CSI-related information report. In one embodiment, the target handover cell may reserve CG-PUSCH resources until the terminal completes a valid CSI report according to the indication of the CSI request field, and then release the CG-PUSCH resources; alternatively, the target handover cell may schedule new PUSCH resources for the terminal for valid CSI reporting, without limitation.

[0195] Example 2:

[0196] Part 1;

[0197] Assume that the base station configures N=1 CSI reporting configurations (CSI-ReportConfig) for the terminal. Each CSI reporting configuration corresponds to multiple candidate cells and is configured in the LTM configuration (LTM-Candidate) (as shown in Figure 9 (CSI reporting configuration method) as LTM-Candidate-1 and LTM-Candidate-2). The CSI-ReportConfig may also include reporting volume indicators, such as indicating that this reporting configuration needs to complete CRI-RI-PMI-CQI reporting. In one implementation, this CSI reporting configuration is associated with M periodic or semi-persistent CSI-RS resources (e.g., M=4), all of which belong to multiple candidate cells. This embodiment takes semi-persistent CSI-RS resources as an example. Figure 9 (CSI reporting configuration method) shows a CSI reporting configuration where the semi-persistent NZP CSI-RS resources belong to two candidate cells: NZP CSI-RS resource-1 and NZP CSI-RS resource-2 of candidate cell 1, and NZP CSI-RS resource-1 and NZP CSI-RS resource-6 of candidate cell 2. Assume that each NZP CSI-RS resource is configured with a TCI state. For example, candidate cell 1's NZP CSI-RS resource-1 is configured with TCI state-3, candidate cell 1's NZP CSI-RS resource-2 is configured with TCI state-5, candidate cell 2's NZP CSI-RS resource-1 is configured with TCI state-37, and candidate cell 2's NZP CSI-RS resource-6 is configured with TCI state-45.

[0198] Similar to Embodiment 1, in another implementation (see Figure 6 for related content), this CSI reporting configuration can also be associated with a CSI-RS resource set, which includes the aforementioned NZP CSI-RS resources. Further details will not be provided here.

[0199] Part Two;

[0200] If the terminal has the capability for advance CSI measurement, the base station can send a semi-persistent CSI-RS transmission activation signaling to the terminal (which may correspond to the second signaling mentioned above). One implementation is that the activation signaling activates all NZP CSI-RS resources associated with a CSI reporting configuration. For example, M = 4 NZP CSI-RS resources in Figure 9. Another implementation is that the base station can select some NZP CSI-RS resources to activate based on the L1-RSRP (Reference Signal Receiving Power) information reported by the terminal, or according to the indication of the TCI activation signaling; for example, the activation signaling activates NZP CSI-RS resource-1 of candidate cell 1 associated with the CSI reporting configuration, while the other 3 NZP CSI-RS resources remain inactive. If a CSI reporting configuration is associated with multiple CSI-RS resource sets, or multiple CSI reporting configurations are associated with multiple CSI-RS resource sets, the activation signaling can also activate one or more CSI-RS resource sets. The activation signaling can simultaneously instruct the terminal to start measuring the activated NZP CSI-RS resources, and can correspond to the second signaling mentioned above to trigger the terminal to perform CSI-RS measurements.

[0201] Part Three;

[0202] The terminal receives cell handover signaling sent by the base station. In one embodiment, the cell handover signaling may include a target configuration ID and a TCI state ID. The terminal can determine the target handover cell based on the target configuration ID in the cell handover signaling. The terminal can also determine the target reporting configuration and the target CSI-RS resource based on the target handover cell and the target TCI state corresponding to the TCI state ID in the cell handover signaling. The target CSI-RS resource can belong to the target handover cell and its configured TCI state is the same as or quasi-co-located with the target TCI state; the target reporting configuration can be a CSI reporting configuration that includes the target CSI-RS resource. For example, the target configuration ID points to candidate cell 1, meaning candidate cell 1 is the target handover cell; simultaneously, the TCI state ID indicates TCI state-5 as the target TCI state; based on this, for the configuration in Figure 9, the terminal can determine that NZP CSI-RS resource-2 of candidate cell 1 is the target CSI-RS resource, and simultaneously determine that the CSI-ReportConfig shown in Figure 9 is the target reporting configuration. If the terminal has the capability for advance CSI measurement (pre-measurement relative to the handover command), it can retain only the measurement of NZP CSI-RS resource-2 and stop the measurement of other NZP CSI-RS resources (corresponding to the above-mentioned target reporting configuration, continuing to measure the target CSI-RS and stopping the measurement of other CSI-RS besides the target CSI-RS). Accordingly, the candidate cell will stop the transmission of the other NZP CSI-RS resources. If the terminal does not have the capability for advance CSI measurement, it can trigger candidate cell 1 to start transmitting NZP CSI-RS resource-2, and the terminal will start measuring this CSI-RS resource (corresponding to the above-mentioned target reporting configuration, starting to measure the target CSI-RS).

[0203] In another implementation, as shown in FIG10, the cell handover signaling may further include one or more of the following: a reporting configuration indication (CSI-ReportConfig-ID), a CSI-RS resource indication (NZP CSI-RS resource ID), and a reporting offset indication (Report offset). The terminal can determine the target handover cell based on the target configuration ID in the cell handover signaling; based on the target handover cell, it can directly determine the target reporting configuration and the target CSI-RS resource according to the signaling indication (which may correspond to determining the target reporting configuration in the at least one reporting configuration based on the target handover cell and the reporting configuration indication; and determining the target CSI-RS in the CSI-RS associated with the at least one reporting configuration based on the CSI-RS resource indication). In some embodiments, the reporting offset indication can be used by the terminal to determine the time for CSI reporting to the target handover cell. In some embodiments, the reporting offset indication is a time offset relative to this cell handover signaling, and the terminal can perform CSI reporting on the first PUSCH resource after this offset; it may correspond to sending the CSI to the second network device on the uplink resource determined according to the cell handover signaling.

[0204] Furthermore, the terminal can also feed back CSI-related information to the target handover cell on the system-predefined PUSCH resources; corresponding to the above-mentioned sending of the CSI to the second network device on one or more system-predefined uplink resources according to the cell handover signaling. In one embodiment, the system-predefined PUSCH resources can be predefined as follows, but are not limited thereto:

[0205] a) For CBRA-based cell handover: the PUSCH resource can be the resource corresponding to message 5 (Msg5);

[0206] b) For CFRA-based cell handover: the PUSCH resource can be the resource corresponding to message 3 (Msg3) or the resource corresponding to message 5 (Msg5);

[0207] c) For non-RACH cell handover: The PUSCH resource can be the first DG-PUSCH resource of the target cell (i.e., the target cell) after the cell handover signaling, that is, the PUSCH resource can be the first DG-PUSCH resource of the target cell (or the target cell corresponding to the target cell) after the cell handover signaling; or, the PUSCH resource can be the first CG-PUSCH resource of the target cell after the cell handover signaling, that is, the PUSCH resource can be the first CG-PUSCH resource of the target cell (or the target cell corresponding to the target cell) after the cell handover signaling; or, the PUSCH resource can be the PUSCH resource of the terminal reporting the RRC completion message; or the PUSCH resource can be the first PUSCH resource after the reporting offset indicated in the cell handover signaling.

[0208] In some embodiments, the terminal reports CSI-related information on the PUSCH resource. In one embodiment, the CSI-related information may include, as shown in Figure 11 (CSI-related information method one), a CSI availability indication field and the CSI indicated in the CSI reporting configuration (e.g., CRI-RI-PMI-CQI in this embodiment; reported in the CSI field). Specifically, if the terminal has completed the measurement of the NZP CSI-RS resource at the aforementioned PUSCH resource time (i.e., on the resource symbol) and obtained the CRI, RI, PMI, and / or CQI information indicated in the CSI-ReportConfig, then the CSI availability indication field can indicate 1, indicating the existence of valid CSI information; and the terminal reports this CSI information in the CSI field. Otherwise, if the terminal has not completed the measurement of the NZP CSI-RS resource at the aforementioned PUSCH resource time, then the CSI availability indication field can indicate 0, indicating no valid CSI information; the CSI field is invalid.

[0209] In one implementation, for CFRA-based cell handover, if CSI reporting is not completed on Msg3, it can be completed on Msg5, but this is not a limitation.

[0210] In another implementation, the CSI-related information may include a CSI request field and a CSI field, as shown in Figure 12 (CSI-related information method two). Specifically, the CSI request field may indicate the reporting time of (expected) valid CSI. For example, if the CSI request field indicates L=2, it means that the CSI calculation has not yet been completed, and a valid CSI can be reported after 2 time slots, at which time the CSI field is invalid; if L=0 is reported, it means that the CSI acquisition has been completed, and a valid CRI-RI-PMI-CQI is reported in the CSI field, but this is not a limitation.

[0211] Based on the above, the target handover cell receives the CSI-related information report. In one embodiment, the target handover cell may reserve CG-PUSCH resources until the terminal completes a valid CSI report according to the indication of the CSI request field, and then release the CG-PUSCH resources; alternatively, the target handover cell may schedule new PUSCH resources for the terminal for valid CSI reporting, without limitation.

[0212] During the above process, the target handover cell can stop transmitting semi-persistent NZP CSI-RS resources after receiving a valid CSI report.

[0213] It should be noted that the relevant content of the above embodiments can be referred to each other, and the repeated parts will not be described again.

[0214] Based on the above, the solutions provided in this disclosure involve the following:

[0215] 1. Configuration reporting method:

[0216] The system receives N reporting configurations indicated by the network side, each reporting configuration being associated with one or more CSI-RS resources for acquiring channel state information; the N reporting configurations include any of the following:

[0217] a) Each of the N reporting configurations corresponds to a candidate cell, and the CSI-RS resources associated with each reporting configuration belong to the same candidate cell;

[0218] b) Each of the N reporting configurations corresponds to multiple candidate cells, and the CSI-RS resources associated with each reporting configuration belong to multiple candidate cells;

[0219] Where N is an integer greater than or equal to 1.

[0220] 2. Activate the measurement method:

[0221] Method 1: 1) The terminal receives a first signaling message sent by the network side, which is used to trigger the terminal to perform CSI-RS measurements. The first signaling message is used to activate the TCI state of the candidate cell; after receiving the first signaling message, the terminal starts measuring the CSI-RS resources associated with the activated TCI state of the corresponding candidate cell (e.g., all candidate cells configured to be associated). Alternatively, 2) When the terminal receives both the first signaling message and a PDCCH_order signaling message indicating the candidate cell, it starts measuring the CSI-RS resources associated with the activated TCI state of the candidate cell corresponding to the PDCCH_order signaling message.

[0222] Method 2: The terminal receives a second signaling message sent by the network side. This second signaling message is for activating semi-persistent CSI-RS transmission, and the activation operation may include at least one of the following:

[0223] a) Activate the CSI-RS resource set of a candidate cell or one or more CSI-RS resources of a candidate cell;

[0224] b) Activate one or more CSI-RS resource sets, wherein the CSI-RS resource sets contain CSI-RS resources of multiple candidate cells;

[0225] c) Activate multiple CSI-RS resources for multiple candidate cells.

[0226] After receiving the second signaling, the terminal begins to measure the semi-persistent CSI-RS activated by this signaling.

[0227] 3. Activation and reporting method:

[0228] Method 1: Receive cell handover signaling sent by the network side, including:

[0229] The terminal determines the target handover cell based on the target configuration ID in the cell handover signaling. The terminal then determines the target reporting configuration and target CSI-RS resources based on the target handover cell and the target TCI status corresponding to the TCI status ID in the cell handover signaling. The target reporting configuration corresponds to the target handover cell, and the target CSI-RS resources are associated with the target reporting configuration and configured with the target TCI status or quasi-co-located with the target TCI status. Specifically, this can be done by first determining the target handover cell and then determining the handover reporting configuration and target CSI-RS resources (resources corresponding to the target TCI status) from the target handover cell's configuration, but this is not a limitation.

[0230] The terminal may begin measuring the target CSI-RS resources after receiving the cell handover signaling, but is not limited to this.

[0231] Method 2: The terminal receives cell handover signaling sent by the network side. This signaling may include a reporting configuration indication and / or a CSI-RS resource indication. The terminal may: determine the target handover cell based on the target configuration ID in the cell handover signaling; determine the target reporting configuration based on the target cell and the reporting configuration indication; determine the target CSI-RS resource based on the CSI-RS resource indication, or the target CSI-RS resource is associated with the target reporting configuration (i.e., the target CSI-RS resource is determined based on the target reporting configuration), and the target CSI-RS resource is configured with the target TCI state or is quasi-co-located with the target TCI state.

[0232] The terminal may begin measuring the target CSI-RS resources after receiving the cell handover signaling, but is not limited to this.

[0233] 4. Reporting content:

[0234] CSI reporting may include at least one of a CSI availability indication field and a CSI request field; the CSI availability indication field may be used to indicate whether the current CSI is valid; the CSI request field may be used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI.

[0235] 5. Report resources:

[0236] a) The base station can indicate the reporting time offset in the cell handover signaling, and the terminal can report CSI on the first PUSCH resource after the reporting offset.

[0237] (b) The base station may retain CG-PUSCH resources until a CSI report is received. Specifically, the base station may determine the retention time of the CG-PUSCH resources based on the time information of the CSI uplink resources reported by the terminal (this information may be carried in the aforementioned CSI request field or other fields).

[0238] In summary, the embodiments of this disclosure provide a target cell CSI reporting method during cell handover. This method can configure CSI-RS measurement resources and CSI reporting configuration for multiple candidate cells, activate advance measurement through signaling, and trigger reporting in conjunction with cell handover signaling (or trigger non-advance measurement (relative to the reception time of cell handover signaling)). The terminal can determine the reporting resources for CSI reporting based on cell handover signaling or a predefined method. This enables the target cell to obtain the terminal's channel state information during cell handover, thereby ensuring the data transmission performance of the terminal after cell handover without reducing cell handover latency.

[0239] This disclosure also provides a channel state information transmission device, which is a terminal, as shown in FIG13, including a memory 131, a transceiver 132, and a processor 133.

[0240] Memory 131 is used to store computer programs; transceiver 132 is used to send and receive data under the control of processor 133; processor 133 is used to read the computer program in memory 131 and perform the following operations:

[0241] The transceiver 132 receives at least one reporting configuration sent by the first network device; each reporting configuration is associated with at least one Channel State Information Reference Signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell.

[0242] The transceiver 132 receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0243] According to the cell handover signaling, the transceiver 132 sends the Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device; the second network device corresponds to the target handover cell.

[0244] The channel state information transmission device provided in this embodiment receives at least one reporting configuration sent by a first network device; each reporting configuration is associated with at least one channel state information reference signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell; receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell among the at least one candidate cell, the target reporting configuration among the at least one reporting configuration, and the target CSI-RS among the CSI-RS associated with the at least one reporting configuration; and sends a signal to a second network device based on the cell handover signaling, according to the target CSI-RS. The system reports the Channel State Information (CSI) corresponding to the target CSI-RS; the second network device corresponds to the target handover cell; it can support starting CSI measurement before the cell handover is completed, so as to ensure that the network device can obtain the terminal's current CSI as soon as possible in the cell handover scenario (e.g., obtain the terminal's current CSI during the cell handover process), and then use the MCS level that matches the channel as early as possible after the cell handover is completed, so as to shorten or avoid the time of using the lowest MCS level for data scheduling, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in cell handover scenarios in related technologies.

[0245] Specifically, transceiver 132 is used to receive and send data under the control of processor 133.

[0246] In Figure 13, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 133 and memory represented by memory 131. The bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. Transceiver 132 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium, including wireless channels, wired channels, optical fibers, etc. For different user equipment, user interface 134 can also be an interface capable of connecting external or internal devices, including but not limited to keypads, displays, speakers, microphones, joysticks, etc.

[0247] The processor 133 is responsible for managing the bus architecture and general processing, and the memory 131 can store the data used by the processor 133 when performing operations.

[0248] In some embodiments, the processor 133 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD), and the processor may also adopt a multi-core architecture.

[0249] The processor executes any of the methods described in the embodiments of this disclosure by invoking a computer program stored in memory, according to the obtained executable instructions. The processor and memory may also be physically separated.

[0250] The operation further includes: before receiving the cell handover signaling sent by the first network device, receiving the first signaling sent by the first network device through the transceiver, the first signaling being used to activate the first transmission configuration indication (TCI) state of the candidate cell and trigger the terminal to perform CSI-RS measurement; and performing CSI-RS measurement for the first TCI state associated with the candidate cell according to the first signaling.

[0251] In this embodiment of the disclosure, the operation further includes: receiving physical downlink control channel (PDCCH) command signaling sent by the first network device via the transceiver before receiving cell handover signaling sent by the first network device; determining a first candidate cell among the candidate cells corresponding to the PDCCH command signaling; and measuring the CSI-RS associated with the first TCI state in the candidate cell according to the first signaling, which includes: measuring the CSI-RS associated with the first TCI state in the first candidate cell according to the first signaling.

[0252] The operation further includes: before receiving the cell handover signaling sent by the first network device, receiving a second signaling sent by the first network device through the transceiver, the second signaling being used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; and performing measurement on the semi-persistent CSI-RS according to the second signaling; wherein the semi-persistent CSI-RS includes at least one of the following: a set of CSI-RS of a candidate cell or at least one CSI-RS of a candidate cell; at least one set of CSI-RS, the set of CSI-RS containing at least two CSI-RS of the candidate cells; or at least two CSI-RS of at least two candidate cells.

[0253] In this embodiment of the disclosure, the second signaling is further used to activate the second TCI state of the candidate cell; or, the second signaling is a PDCCH command signaling.

[0254] The cell handover signaling includes a target configuration identifier and a TCI status identifier. The operation further includes: determining a target handover cell among at least one candidate cell based on the target configuration identifier; determining a target reporting configuration among at least one reporting configuration and a target CSI-RS among the CSI-RS associated with the at least one reporting configuration based on the target handover cell and the target TCI status corresponding to the TCI status identifier; wherein the target reporting configuration corresponds to the target handover cell, the target CSI-RS is associated with the target reporting configuration, and the target CSI-RS is configured with the target TCI status or is quasi-co-located with the target TCI status.

[0255] In this embodiment of the disclosure, the operation further includes: before sending the Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device via the transceiver according to the cell handover signaling, starting to measure the target CSI-RS according to the target reporting configuration; or, continuing to measure the target CSI-RS according to the target reporting configuration and stopping the measurement of other CSI-RS besides the target CSI-RS; or, obtaining the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSIs; wherein the target reporting configuration and the target CSI-RS are determined according to the cell handover signaling.

[0256] The cell handover signaling is used to instruct the target handover cell to transmit semi-persistent CSI-RS; the step of starting to measure the target CSI-RS according to the target reporting configuration includes: starting to measure the semi-persistent CSI-RS transmitted by the target handover cell according to the target reporting configuration; the semi-persistent CSI-RS includes the target CSI-RS.

[0257] In this embodiment of the disclosure, the cell handover signaling includes at least one of a reporting configuration indication and a CSI-RS resource indication; the operation further includes: before sending Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device via the transceiver according to the cell handover signaling, determining the target reporting configuration in the at least one reporting configuration according to the target handover cell and the reporting configuration indication; determining the target CSI-RS in the CSI-RS associated with the at least one reporting configuration according to the CSI-RS resource indication; or, determining the target CSI-RS according to the target reporting configuration and the target TCI status; the target TCI status is the TCI status corresponding to the TCI status identifier carried in the cell handover signaling.

[0258] The cell handover signaling includes the CSI reporting offset indication.

[0259] In this embodiment of the disclosure, the step of sending Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device via the transceiver according to the cell handover signaling includes: sending the CSI to the second network device via the transceiver on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling, based on the cell handover signaling.

[0260] The operation further includes: sending at least one of CSI availability indication information and CSI request information to the second network device through the transceiver; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI; wherein the CSI availability indication information is sent together with the CSI or sent separately.

[0261] In this embodiment of the disclosure, sending the CSI includes: sending the CSI based on the uplink resource or the time information requested by the CSI request information.

[0262] One or more uplink resources predefined by the system become invalid after a valid CSI is sent.

[0263] It should be noted that the device provided in this embodiment can implement all the method steps implemented in the above terminal-side method embodiment and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0264] This disclosure also provides a channel state information transmission device, which is a first network device, as shown in FIG14, including a memory 141, a transceiver 142, and a processor 143.

[0265] Memory 141 is used to store computer programs; transceiver 142 is used to send and receive data under the control of processor 143; processor 143 is used to read the computer program in memory 141 and perform the following operations:

[0266] The transceiver 142 sends at least one reporting configuration to the terminal; each reporting configuration is associated with at least one CSI-RS and corresponds to at least one candidate cell.

[0267] The transceiver 142 sends cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the following: the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0268] The channel state information transmission device provided in this embodiment sends at least one reporting configuration to the terminal; each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell; and sends cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the target handover cell among the at least one candidate cell, the target reporting configuration among the at least one reporting configuration, and the target CSI-RS among the CSI-RS associated with the at least one reporting configuration; it can support starting CSI measurement before the cell handover is completed, so as to ensure that the network device can obtain the terminal's current CSI as soon as possible in the cell handover scenario (e.g., obtain the terminal's current CSI during the cell handover process), and then, after the cell handover is completed, it can use the MCS level matched to the channel for data scheduling as early as possible, and shorten or avoid the time of using the lowest MCS level for data scheduling as much as possible, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in the cell handover scenario in related technologies.

[0269] Specifically, transceiver 142 is used to receive and send data under the control of processor 143.

[0270] In Figure 14, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 143 and memory represented by memory 141. The bus architecture may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. Transceiver 142 may be multiple elements, including transmitters and receivers, providing units for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. Processor 143 is responsible for managing the bus architecture and general processing, and memory 141 may store data used by processor 143 during operation.

[0271] The processor 143 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0272] The operation further includes: before sending cell handover signaling to the terminal, sending a first signaling to the terminal via the transceiver, the first signaling being used to activate the first TCI state of the candidate cell and trigger the terminal to perform CSI-RS measurement.

[0273] In this embodiment of the disclosure, the operation further includes: before sending cell handover signaling to the terminal, sending PDCCH command signaling to the terminal through the transceiver; the PDCCH command signaling is used by the terminal to determine the first candidate cell among the candidate cells.

[0274] The operation further includes: before sending cell handover signaling to the terminal, sending a second signaling to the terminal via the transceiver, the second signaling being used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; wherein the semi-persistent CSI-RS includes at least one of the following: a set of CSI-RS of a candidate cell or at least one CSI-RS of a candidate cell; at least one set of CSI-RS containing at least two CSI-RS of the candidate cells; at least two CSI-RS of at least two candidate cells.

[0275] In this embodiment of the disclosure, the cell handover signaling includes: a target configuration identifier and a TCI status identifier; the target configuration identifier and the TCI status identifier are used by the terminal to determine the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0276] The cell handover signaling includes at least one of a reporting configuration instruction and a CSI-RS resource instruction.

[0277] In this embodiment of the disclosure, the cell handover signaling includes: the CSI reporting offset indication.

[0278] It should be noted that the device provided in this embodiment can implement all the method steps implemented in the first network device side method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0279] This disclosure also provides a channel state information transmission device, which is a second network device, as shown in FIG15, including a memory 151, a transceiver 152, and a processor 153.

[0280] Memory 151 is used to store computer programs; transceiver 152 is used to send and receive data under the control of processor 153; processor 153 is used to read the computer program in memory 151 and perform the following operations:

[0281] The transceiver 152 receives the CSI corresponding to the target reporting configuration and the target CSI-RS, which is sent by the cell handover signaling according to the cell handover signaling.

[0282] The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell.

[0283] The second network device corresponds to the target handover cell.

[0284] The channel state information transmission device provided in this embodiment receives CSIs corresponding to target reporting configurations and target CSI-RSs sent by a terminal according to cell handover signaling. The cell handover signaling is used to determine at least one of the target handover cell among at least one candidate cell, the target reporting configuration among at least one reporting configuration, and at least one of the target CSI-RSs among the CSI-RSs associated with the at least one reporting configuration. Each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell. The second network device corresponds to the target handover cell. This device can support starting CSI measurement before cell handover is completed, ensuring that the network device obtains the terminal's current CSI as quickly as possible in cell handover scenarios (e.g., obtaining the terminal's current CSI during cell handover). Therefore, after cell handover, data scheduling can be performed as early as possible using the MCS level matched to the channel, minimizing or avoiding the time required for data scheduling using the lowest MCS level, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in cell handover scenarios in related technologies.

[0285] Specifically, transceiver 152 is used to receive and send data under the control of processor 153.

[0286] In Figure 15, the bus architecture may include any number of interconnected buses and bridges, specifically linking various circuits of one or more processors represented by processor 153 and memory represented by memory 151. The bus architecture may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. Transceiver 152 may be multiple elements, including transmitters and receivers, providing units for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. Processor 153 is responsible for managing the bus architecture and general processing, and memory 151 may store data used by processor 153 during operation.

[0287] The processor 153 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0288] The CSI sent by the receiving terminal according to the cell handover signaling, which corresponds to the target reporting configuration and the target CSI-RS, includes: the CSI sent by the receiving terminal on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling.

[0289] In this embodiment of the disclosure, the operation further includes: receiving at least one of CSI availability indication information and CSI request information sent by the terminal through the transceiver; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI; wherein the CSI availability indication information is sent together with the CSI or sent separately.

[0290] The operation further includes: feeding back the uplink resources or the time information to the terminal through the transceiver according to the CSI request information; wherein receiving the CSI includes: receiving the CSI sent by the terminal according to the uplink resources or the time information.

[0291] In this embodiment of the disclosure, the operation further includes: after receiving a valid CSI, stopping the transmission of CSI-RS.

[0292] In this system, one or more predefined uplink resources become invalid after a valid CSI is received.

[0293] It should be noted that the device provided in this embodiment can implement all the method steps implemented in the second network device side method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0294] This disclosure also provides a processing apparatus, including a processor and an interface; the processor can be used to execute the methods described in the above method embodiments.

[0295] It should be understood that the aforementioned processing device can be a chip. For example, the processing device can be a field-programmable gate array (FPGA), can include an application-specific integrated circuit (ASIC), can be a system-on-a-chip (SoC), can be a central processor unit (CPU), can be a network processor (NP), can be a digital signal processor (DSP), can be a microcontroller unit (MCU), can be a programmable logic device (PLD), or other integrated chip.

[0296] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in this embodiment can be executed by a hardware processor, or by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the art, such as random access registers, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. Since this storage medium is located in memory, the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method; to avoid repetition, these will not be described in detail here.

[0297] It should be noted that the processor in this embodiment can be an integrated circuit chip with signal processing capabilities. During implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The processor can implement or execute the methods, steps, and logic block diagrams disclosed in this embodiment. The general-purpose processor can be a microprocessor or any conventional processor.

[0298] It is understood that the memory in the embodiments of this disclosure can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache.

[0299] This disclosure also provides a channel state information transmission device, applied to a terminal, as shown in FIG16, including:

[0300] The first receiving unit 161 is configured to receive at least one reporting configuration sent by the first network device; one of the reporting configurations is associated with at least one Channel State Information Reference Signal (CSI-RS), and one of the reporting configurations corresponds to at least one candidate cell.

[0301] The second receiving unit 162 is used to receive cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0302] The first sending unit 163 is used to send channel state information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling; the second network device corresponds to the target handover cell.

[0303] The channel state information transmission apparatus provided in this embodiment receives at least one reporting configuration sent by a first network device; each reporting configuration is associated with at least one channel state information reference signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell; receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell among the at least one candidate cell, the target reporting configuration among the at least one reporting configuration, and the target CSI-RS among the CSI-RS associated with the at least one reporting configuration; and sends a signal to a second network device based on the cell handover signaling, according to the target CSI-RS. The system reports the Channel State Information (CSI) corresponding to the target CSI-RS; the second network device corresponds to the target handover cell; it can support starting CSI measurement before the cell handover is completed, so as to ensure that the network device can obtain the terminal's current CSI as soon as possible in the cell handover scenario (e.g., obtain the terminal's current CSI during the cell handover process), and then use the MCS level that matches the channel as early as possible after the cell handover is completed, so as to shorten or avoid the time of using the lowest MCS level for data scheduling, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in cell handover scenarios in related technologies.

[0304] The channel state information transmission device further includes: a third receiving unit, configured to receive a first signaling sent by the first network device before receiving the cell handover signaling sent by the first network device, the first signaling being used to activate the first transmission configuration indication (TCI) state of the candidate cell and trigger the terminal to perform CSI-RS measurement; and a first measurement unit, configured to perform CSI-RS measurement on the candidate cell associated with the first TCI state according to the first signaling.

[0305] In this embodiment of the present disclosure, the channel state information transmission device further includes: a fourth receiving unit, configured to receive a physical downlink control channel (PDCCH) command signaling sent by the first network device before receiving a cell handover signaling sent by the first network device; a first determining unit, configured to determine a first candidate cell among the candidate cells corresponding to the PDCCH command signaling; the step of measuring the CSI-RS associated with the first TCI state in the candidate cell according to the first signaling includes: measuring the CSI-RS associated with the first TCI state in the first candidate cell according to the first signaling.

[0306] The channel state information transmission device further includes: a fifth receiving unit, configured to receive a second signaling sent by the first network device before receiving the cell handover signaling sent by the first network device, the second signaling being used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; a second measurement unit, configured to perform measurement on the semi-persistent CSI-RS according to the second signaling; wherein the semi-persistent CSI-RS includes at least one of the following: a set of CSI-RS of a candidate cell or at least one CSI-RS of a candidate cell; at least one set of CSI-RS, the set of CSI-RS containing at least two CSI-RS of the candidate cells; at least two CSI-RS of at least two candidate cells.

[0307] In this embodiment of the disclosure, the second signaling is further used to activate the second TCI state of the candidate cell; or, the second signaling is a PDCCH command signaling.

[0308] The cell handover signaling includes a target configuration identifier and a TCI status identifier. The channel state information transmission device further includes a second determining unit, configured to determine a target handover cell among at least one candidate cell based on the target configuration identifier; and a third determining unit, configured to determine a target reporting configuration among at least one reporting configuration and a target CSI-RS among the CSI-RS associated with the at least one reporting configuration based on the target handover cell and the target TCI status corresponding to the TCI status identifier. The target reporting configuration corresponds to the target handover cell, the target CSI-RS is associated with the target reporting configuration, and the target CSI-RS is configured with the target TCI status or is quasi-co-located with the target TCI status.

[0309] In this embodiment of the present disclosure, the channel state information transmission device further includes: a measurement acquisition unit, configured to, before sending the channel state information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling, start measuring the target CSI-RS according to the target reporting configuration; or, continue measuring the target CSI-RS according to the target reporting configuration and stop measuring other CSI-RS besides the target CSI-RS; or, acquire the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSIs; wherein the target reporting configuration and the target CSI-RS are determined according to the cell handover signaling.

[0310] The cell handover signaling is used to instruct the target handover cell to transmit semi-persistent CSI-RS; the step of starting to measure the target CSI-RS according to the target reporting configuration includes: starting to measure the semi-persistent CSI-RS transmitted by the target handover cell according to the target reporting configuration; the semi-persistent CSI-RS includes the target CSI-RS.

[0311] In this embodiment of the disclosure, the cell handover signaling includes at least one of a reporting configuration indication and a CSI-RS resource indication; the channel state information transmission device further includes: a fourth determining unit, configured to determine a target reporting configuration in the at least one reporting configuration based on the target handover cell and the reporting configuration indication before sending the channel state information CSI corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling; a fifth determining unit, configured to determine a target CSI-RS in the CSI-RS associated with the at least one reporting configuration based on the CSI-RS resource indication; or, to determine the target CSI-RS based on the target reporting configuration and the target TCI state; the target TCI state is the TCI state corresponding to the TCI state identifier carried in the cell handover signaling.

[0312] The cell handover signaling includes the CSI reporting offset indication.

[0313] In this embodiment of the disclosure, sending Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling includes: sending the CSI to the second network device on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling.

[0314] The channel state information transmission device further includes: a second transmission unit, configured to send at least one of CSI availability indication information and CSI request information to the second network device; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI; wherein the CSI availability indication information is sent together with the CSI or sent separately.

[0315] In this embodiment of the disclosure, sending the CSI includes: sending the CSI based on the uplink resource or the time information requested by the CSI request information.

[0316] One or more uplink resources predefined by the system become invalid after a valid CSI is sent.

[0317] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented in the above terminal-side method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0318] This disclosure also provides a channel state information transmission device, applied to a first network device, as shown in FIG17, including:

[0319] The third sending unit 171 is used to send at least one reporting configuration to the terminal; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell;

[0320] The fourth sending unit 172 is used to send cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0321] The channel state information transmission device provided in this embodiment sends at least one reporting configuration to a terminal; each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell; and sends cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the target handover cell among the at least one candidate cell, the target reporting configuration among the at least one reporting configuration, and the target CSI-RS among the CSI-RS associated with the at least one reporting configuration; it can support starting CSI measurement before the cell handover is completed, so as to ensure that the network device can obtain the terminal's current CSI as soon as possible in the cell handover scenario (e.g., obtain the terminal's current CSI during the cell handover process), and then, after the cell handover is completed, data scheduling can be performed as early as possible using the MCS level that matches the channel, so as to shorten or avoid the time of data scheduling using the lowest MCS level, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in the cell handover scenario in related technologies.

[0322] The channel state information transmission device further includes: a fifth sending unit, used to send a first signaling to the terminal before sending cell handover signaling to the terminal, the first signaling being used to activate the first TCI state of the candidate cell and trigger the terminal to perform CSI-RS measurement.

[0323] In this embodiment of the present disclosure, the channel state information transmission device further includes: a sixth transmitting unit, configured to transmit PDCCH command signaling to the terminal before transmitting cell handover signaling to the terminal; the PDCCH command signaling is used by the terminal to determine a first candidate cell among the candidate cells.

[0324] The channel state information transmission device further includes: a seventh transmission unit, configured to send a second signaling to the terminal before sending cell handover signaling to the terminal, the second signaling being configured to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; wherein the semi-persistent CSI-RS includes at least one of the following: a set of CSI-RS of a candidate cell or at least one CSI-RS of a candidate cell; at least one set of CSI-RS containing at least two CSI-RS of the candidate cells; or at least two CSI-RS of at least two candidate cells.

[0325] In this embodiment of the disclosure, the cell handover signaling includes: a target configuration identifier and a TCI status identifier; the target configuration identifier and the TCI status identifier are used by the terminal to determine the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

[0326] The cell handover signaling includes at least one of a reporting configuration instruction and a CSI-RS resource instruction.

[0327] In this embodiment of the disclosure, the cell handover signaling includes: the CSI reporting offset indication.

[0328] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented in the first network device side method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0329] This disclosure also provides a channel state information transmission device, applied to a second network device, as shown in FIG18, including:

[0330] The sixth receiving unit 181 is used to receive the CSI corresponding to the target reporting configuration and the target CSI-RS sent by the terminal according to the cell handover signaling;

[0331] The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell.

[0332] The second network device corresponds to the target handover cell.

[0333] The channel state information transmission device provided in this embodiment receives CSI corresponding to the target reporting configuration and the target CSI-RS sent by the terminal according to the cell handover signaling. The cell handover signaling is used to determine at least one of the target handover cell among at least one candidate cell, the target reporting configuration among at least one reporting configuration, and the target CSI-RS among the CSI-RS associated with the at least one reporting configuration. Each reporting configuration is associated with at least one CSI-RS, and each reporting configuration corresponds to at least one candidate cell. The second network device corresponds to the target handover cell. This device can support starting CSI measurement before the cell handover is completed, ensuring that the network device obtains the terminal's current CSI as quickly as possible in the cell handover scenario (e.g., obtaining the terminal's current CSI during the cell handover process). Therefore, after the cell handover is completed, data scheduling can be performed as early as possible using the MCS level matched to the channel, minimizing or avoiding the time required for data scheduling using the lowest MCS level, thereby improving data transmission performance to a certain extent and solving the problem of data transmission performance degradation in cell handover scenarios in related technologies.

[0334] The CSI sent by the receiving terminal according to the cell handover signaling, which corresponds to the target reporting configuration and the target CSI-RS, includes: the CSI sent by the receiving terminal on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling.

[0335] In this embodiment of the present disclosure, the channel state information transmission device further includes: a seventh receiving unit, configured to receive at least one of CSI availability indication information and CSI request information sent by a terminal; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI; wherein the CSI availability indication information is sent together with the CSI or sent separately.

[0336] The channel state information transmission device further includes: a first feedback unit, configured to feed back the uplink resources or the time information to the terminal based on the CSI request information; wherein receiving the CSI includes: receiving the CSI sent by the terminal based on the uplink resources or the time information.

[0337] In this embodiment of the disclosure, the channel state information transmission device further includes: a first control unit, configured to control the cessation of CSI-RS transmission after receiving a valid CSI.

[0338] In this system, one or more predefined uplink resources become invalid after a valid CSI is received.

[0339] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented in the second network device side method embodiment and achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described in detail here.

[0340] It should be noted that the division of units in the embodiments of this disclosure is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0341] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to related technologies, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0342] This disclosure also provides a non-transiently readable storage medium storing a program for causing a processor to execute the channel state information transmission method described above for the terminal side, the first network device side, or the second network device side.

[0343] Based on the same concept, this disclosure also provides a computer-readable storage medium storing a computer program or instructions that, when executed by a computer, cause the computer to perform the methods provided in the above embodiments.

[0344] The storage medium can be any available medium that the processor can access. For example, but not limited to, computer-readable media can include RAM, ROM, EEPROM (Electrically Erasable Programmable Read-Only Memory), CD-ROM (Compact Disc Read-Only Memory) or other optical storage media (such as CD (Compact Disc), DVD (Digital Video Disc), BD (Blu-ray Disc), HVD (High-definition Versatile Disc), etc.), disk storage media, or other magnetic storage devices (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer).

[0345] The aforementioned implementation embodiments of the channel state information transmission method on the terminal side, the first network device side, or the second network device side are all applicable to the embodiments of the non-transiently readable storage medium and can achieve the same technical effect.

[0346] This disclosure also provides a chip including a processor coupled to a memory for executing computer programs or instructions stored in the memory. When the processor executes the computer program or instructions, the aforementioned channel state information transmission method on the terminal side, the first network device side, or the second network device side is executed. That is:

[0347] Based on the same concept, this disclosure also provides a chip including a processor coupled to a memory for executing a computer program or instructions stored in the memory, such that when the processor executes the computer program or instructions, the method provided in the above embodiments is implemented.

[0348] It should also be understood that the memory mentioned in the embodiments of this disclosure can be volatile memory and / or non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM includes various forms such as: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) can be integrated into the processor.

[0349] In some embodiments, as shown in FIG19, this disclosure provides a chip system 1000. The chip system 1000 (or processing system) includes logic circuitry 1010 and an input / output interface 1020. The logic circuitry 1010 can be a processing circuit within the chip system 1000. The logic circuitry 1010 can be coupled to a memory unit, calling instructions stored in the memory unit, enabling the chip system 1000 to implement the methods and functions of the various embodiments of this disclosure. The input / output interface 1020 can be an input / output circuit within the chip system 1000, outputting processed information or inputting data or signaling information to be processed into the chip system 1000 for processing.

[0350] As one approach, the chip system 1000 is used to implement the operations in the various method embodiments described above. For example, the logic circuit 1010 is used to implement the relevant operations performed by the terminal in the method embodiments described above, such as the relevant operations performed by the terminal in the embodiment shown in FIG2; the input / output interface 1020 is used to implement the sending and / or receiving related operations performed by the terminal in the method embodiments described above, such as the sending and / or receiving related operations performed by the terminal in the embodiment shown in FIG2.

[0351] In this disclosure, the term "cell" can be understood as the coverage area that a node can provide using a carrier. Generally, a "cell" as a radio resource (e.g., time-frequency resource) is associated with bandwidth, which is the frequency range configured for the carrier. The "cell" associated with the radio resource is defined by a combination of downlink and uplink resources, such as a combination of DL (Downlink) component carriers (CC) and UL (Uplink) CCs.

[0352] Since DL coverage (i.e., the range in which a node can transmit a valid signal) and UL coverage (i.e., the range in which a node can receive a valid signal from a UE) depend on the carrier carrying the signal, the coverage of a node may be related to the coverage of the “cell” associated with the radio resources used by the node.

[0353] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0354] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0355] These processor-executable instructions may also be stored in a processor-readable memory that can instruct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0356] These processor-executable instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, such that the instructions, which execute on the computer or other programmable apparatus, provide steps for implementing the functions specified in one or more flowcharts and / or one or more block diagrams.

[0357] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A channel state information transmission method, applied to a terminal, the method comprising: Receive at least one reported configuration from the first network device; Each of the above reporting configurations is associated with at least one Channel State Information Reference Signal (CSI-RS), and each of the above reporting configurations corresponds to at least one candidate cell; The system receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the following: a target handover cell among at least one candidate cell, a target reporting configuration among at least one reporting configuration, and a target CSI-RS among the CSI-RS associated with at least one reporting configuration; According to the cell handover signaling, the second network device sends Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device; the second network device corresponds to the target handover cell.

2. The channel state information transmission method according to claim 1, wherein, Before receiving the cell handover signaling sent by the first network device, the method further includes: The terminal receives a first signaling sent by the first network device, the first signaling being used to activate the first transmission configuration indication (TCI) state of the candidate cell and trigger the terminal to perform CSI-RS measurement. According to the first signaling, the CSI-RS associated with the first TCI state in the candidate cell is measured.

3. The channel state information transmission method according to claim 2, wherein, Before receiving the cell handover signaling sent by the first network device, the method further includes: Receive the Physical Downlink Control Channel (PDCCH) command signaling sent by the first network device; Determine the first candidate cell among the candidate cells that corresponds to the PDCCH command signaling; The step of measuring the CSI-RS associated with the first TCI state in the candidate cells according to the first signaling includes: According to the first signaling, the CSI-RS associated with the first TCI state in the first candidate cell is measured.

4. The channel state information transmission method according to claim 1, wherein, Before receiving the cell handover signaling sent by the first network device, the method further includes: The terminal receives a second signaling sent by the first network device, the second signaling being used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; According to the second signaling, a measurement is performed for the semi-persistent CSI-RS; The semi-persistent CSI-RS includes at least one of the following: A set of CSI-RS for one candidate cell or at least one CSI-RS for one candidate cell; At least one CSI-RS set, wherein the CSI-RS set contains at least two CSI-RS of the candidate cells; At least two CSI-RS of at least two candidate cells.

5. The channel state information transmission method according to claim 4, wherein, The second signaling is also used to activate the second TCI state of the candidate cell; Alternatively, the second signaling is a PDCCH command signaling.

6. The channel state information transmission method according to any one of claims 1 to 5, wherein, The cell handover signaling includes: target configuration identifier and TCI status identifier; The channel state information transmission method further includes: Based on the target configuration identifier, at least one target handover cell is determined from the candidate cells; Based on the target handover cell and the target TCI status corresponding to the TCI status identifier, determine the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; The target reporting configuration corresponds to the target handover cell, the target CSI-RS is associated with the target reporting configuration, and the target CSI-RS is configured with the target TCI status or quasi-co-located with the target TCI status.

7. The channel state information transmission method according to claim 1, wherein, Before sending the Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device according to the cell handover signaling, the process further includes: Based on the target reported configuration, begin measuring the target CSI-RS; Alternatively, based on the target reporting configuration, continue measuring the target CSI-RS and stop measuring other CSI-RSs besides the target CSI-RS; Alternatively, obtain the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSI; The target reporting configuration and target CSI-RS are determined based on the cell handover signaling.

8. The channel state information transmission method according to claim 7, wherein, The cell handover signaling is used to instruct the target handover cell to perform semi-persistent CSI-RS transmission; The step of starting to measure the target CSI-RS according to the target reported configuration includes: According to the target reporting configuration, start measuring the semi-persistent CSI-RS transmitted by the target handover cell; the semi-persistent CSI-RS includes the target CSI-RS.

9. The channel state information transmission method according to claim 1, wherein, The cell handover signaling includes at least one of: a reporting configuration instruction and a CSI-RS resource instruction; Before sending the Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device according to the cell handover signaling, the process further includes: Based on the target handover cell and the reporting configuration indication, the target reporting configuration in the at least one reporting configuration is determined; Based on the CSI-RS resource indication, determine the target CSI-RS among the at least one CSI-RS associated with the reporting configuration; or, determine the target CSI-RS based on the target reporting configuration and the target TCI status; the target TCI status is the TCI status corresponding to the TCI status identifier carried in the cell handover signaling.

10. The channel state information transmission method according to claim 1, wherein, The step of sending Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device according to the cell handover signaling includes: According to the cell handover signaling, the CSI is sent to the second network device on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling.

11. The channel state information transmission method according to claim 1 or 10, the method further comprising: Send at least one of CSI availability indication information and CSI request information to the second network device; The CSI available indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI; The CSI may be sent together with indication information or sent separately.

12. The channel state information transmission method according to claim 11, wherein, Sending the CSI includes: The CSI is sent based on the uplink resource requested in the CSI request information or the time information.

13. The channel state information transmission method according to claim 10, wherein, One or more predefined uplink resources of the system become invalid after a valid CSI is sent.

14. A channel state information transmission method, applied to a first network device, the method comprising: Send at least one reporting configuration to the terminal; Each of the above reporting configurations is associated with at least one CSI-RS, and each of the above reporting configurations corresponds to at least one candidate cell; The terminal is sent cell handover signaling; the cell handover signaling is used to determine at least one of the following: the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

15. The channel state information transmission method according to claim 14, wherein, Before sending cell handover signaling to the terminal, the process also includes: A first signaling message is sent to the terminal, which is used to activate the first TCI state of the candidate cell and trigger the terminal to perform CSI-RS measurement.

16. The channel state information transmission method according to claim 15, wherein, Before sending cell handover signaling to the terminal, the process also includes: The terminal sends a PDCCH command signaling message; the PDCCH command signaling message is used by the terminal to determine the first candidate cell among the candidate cells.

17. The channel state information transmission method according to claim 14, wherein, Before sending cell handover signaling to the terminal, the process also includes: Send a second signaling message to the terminal, the second signaling message being used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement; The semi-persistent CSI-RS includes at least one of the following: A set of CSI-RS for one candidate cell or at least one CSI-RS for one candidate cell; At least one CSI-RS set, wherein the CSI-RS set contains at least two CSI-RS of the candidate cells; At least two CSI-RS of at least two candidate cells.

18. The channel state information transmission method according to any one of claims 14 to 17, wherein, The cell handover signaling includes: a target configuration identifier and a TCI status identifier; the target configuration identifier and the TCI status identifier are used by the terminal to determine the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

19. The channel state information transmission method according to claim 14, wherein, The cell handover signaling includes at least one of the following: a reporting configuration indication, a CSI-RS resource indication, and a reporting offset indication of the CSI.

20. A channel state information transmission method, applied to a second network device, the method comprising: The receiving terminal sends the CSI corresponding to the target reporting configuration and the target CSI-RS according to the cell handover signaling; The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell. The second network device corresponds to the target handover cell.

21. The channel state information transmission method according to claim 20, wherein, The CSI sent by the receiving terminal according to the cell handover signaling, which corresponds to the target reporting configuration and the target CSI-RS, includes: The receiving terminal transmits the CSI on one or more uplink resources predefined by the system or on uplink resources determined by the cell handover signaling.

22. The channel state information transmission method according to claim 20 or 21, the method further comprising: The receiving terminal sends at least one of the following: CSI availability indication information and CSI request information; The CSI available indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI; The CSI may be sent together with indication information or sent separately.

23. The channel state information transmission method according to claim 22, further comprising: Based on the CSI request information, the uplink resources or the time information are fed back to the terminal; Receiving the CSI includes: Receive the CSI sent by the terminal based on the uplink resources or the time information.

24. The channel state information transmission method according to claim 21, further comprising: Once a valid CSI is received, CSI-RS transmission is stopped.

25. The channel state information transmission method according to claim 21, wherein, One or more predefined uplink resources of the system become invalid after a valid CSI is received.

26. A channel state information transmission device, wherein the channel state information transmission device is a terminal, and the channel state information transmission device includes a memory, a transceiver, and a processor: Memory, used to store computer programs; The transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: The transceiver receives at least one reporting configuration sent by the first network device; each reporting configuration is associated with at least one Channel State Information Reference Signal (CSI-RS), and each reporting configuration corresponds to at least one candidate cell. The transceiver receives cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration. According to the cell handover signaling, the transceiver sends Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device; the second network device corresponds to the target handover cell.

27. The channel state information transmission device according to claim 26, wherein, The operation also includes: Before receiving the cell handover signaling sent by the first network device, the transceiver receives the first signaling sent by the first network device. The first signaling is used to activate the first transmission configuration indication (TCI) state of the candidate cell and trigger the terminal to perform CSI-RS measurement. According to the first signaling, the CSI-RS associated with the first TCI state in the candidate cell is measured.

28. The channel state information transmission device according to claim 27, wherein, The operation also includes: Before receiving the cell handover signaling sent by the first network device, the transceiver receives the physical downlink control channel (PDCCH) command signaling sent by the first network device. Determine the first candidate cell among the candidate cells that corresponds to the PDCCH command signaling; The step of measuring the CSI-RS associated with the first TCI state in the candidate cells according to the first signaling includes: According to the first signaling, the CSI-RS associated with the first TCI state in the first candidate cell is measured.

29. The channel state information transmission device according to claim 26, wherein, The operation also includes: Before receiving the cell handover signaling sent by the first network device, the transceiver receives the second signaling sent by the first network device. The second signaling is used to activate semi-persistent CSI-RS transmission and trigger the terminal to perform CSI-RS measurement. According to the second signaling, a measurement is performed for the semi-persistent CSI-RS; The semi-persistent CSI-RS includes at least one of the following: A set of CSI-RS for one candidate cell or at least one CSI-RS for one candidate cell; At least one CSI-RS set, wherein the CSI-RS set contains at least two CSI-RS of the candidate cells; At least two CSI-RS of at least two candidate cells.

30. The channel state information transmission device according to claim 29, wherein, The second signaling is also used to activate the second TCI state of the candidate cell; Alternatively, the second signaling is a PDCCH command signaling.

31. The channel state information transmission device according to any one of claims 26 to 30, wherein, The cell handover signaling includes: target configuration identifier and TCI status identifier; The operation also includes: Based on the target configuration identifier, at least one target handover cell is determined from the candidate cells; Based on the target handover cell and the target TCI status corresponding to the TCI status identifier, determine the target reporting configuration in the at least one reporting configuration and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; The target reporting configuration corresponds to the target handover cell, the target CSI-RS is associated with the target reporting configuration, and the target CSI-RS is configured with the target TCI status or quasi-co-located with the target TCI status.

32. The channel state information transmission device according to claim 26, wherein, The operation also includes: Before sending the Channel State Information (CSI) corresponding to the target CSI-RS to the second network device via the transceiver according to the cell handover signaling, the target CSI-RS is measured according to the target reporting configuration. Alternatively, based on the target reporting configuration, continue measuring the target CSI-RS and stop measuring other CSI-RSs besides the target CSI-RS; Alternatively, obtain the CSI corresponding to the target reporting configuration and the target CSI-RS from the measured CSI; The target reporting configuration and target CSI-RS are determined based on the cell handover signaling.

33. The channel state information transmission device according to claim 32, wherein, The cell handover signaling is used to instruct the target handover cell to perform semi-persistent CSI-RS transmission; The step of starting to measure the target CSI-RS according to the target reported configuration includes: According to the target reporting configuration, start measuring the semi-persistent CSI-RS transmitted by the target handover cell; the semi-persistent CSI-RS includes the target CSI-RS.

34. The channel state information transmission device according to claim 26, wherein, The cell handover signaling includes at least one of: a reporting configuration instruction and a CSI-RS resource instruction; The operation also includes: Before sending the Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device via the transceiver according to the cell handover signaling, the target reporting configuration in the at least one reporting configuration is determined according to the target cell handover and reporting configuration indication; Based on the CSI-RS resource indication, determine the target CSI-RS among the at least one CSI-RS associated with the reporting configuration; or, determine the target CSI-RS based on the target reporting configuration and the target TCI status; the target TCI status is the TCI status corresponding to the TCI status identifier carried in the cell handover signaling.

35. The channel state information transmission device according to claim 26, wherein, The step of sending Channel State Information (CSI) corresponding to the target reported configuration and the target CSI-RS to the second network device via the transceiver according to the cell handover signaling includes: According to the cell handover signaling, the transceiver sends the CSI to the second network device on one or more uplink resources predefined by the system or on uplink resources determined according to the cell handover signaling.

36. The channel state information transmission device according to claim 26 or 35, wherein, The operation also includes: The transceiver sends at least one of CSI availability indication information and CSI request information to the second network device; the CSI availability indication information is used to indicate whether the CSI is valid; the CSI request information is used to request uplink resources for transmitting the CSI, or to request time information for uplink resources for transmitting the CSI. The CSI may be sent together with indication information or sent separately.

37. The channel state information transmission device according to claim 36, wherein, Sending the CSI includes: The CSI is sent based on the uplink resource requested in the CSI request information or the time information.

38. The channel state information transmission device according to claim 35, wherein, One or more predefined uplink resources of the system become invalid after a valid CSI is sent.

39. A channel state information transmission device, wherein the channel state information transmission device is a first network device, and the channel state information transmission device includes a memory, a transceiver, and a processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: The transceiver sends at least one reporting configuration to the terminal; each reporting configuration is associated with at least one CSI-RS and corresponds to at least one candidate cell. The transceiver sends cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the following: the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

40. A channel state information transmission device, wherein the channel state information transmission device is a second network device, and the channel state information transmission device includes a memory, a transceiver, and a processor: A memory for storing computer programs; a transceiver for sending and receiving data under the control of the processor; and a processor for reading the computer programs from the memory and performing the following operations: Through the transceiver, the receiving terminal receives the CSI corresponding to the target reporting configuration and the target CSI-RS, which is sent according to the cell handover signaling. in, The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; Each of the above reporting configurations is associated with at least one CSI-RS, and each of the above reporting configurations corresponds to at least one candidate cell; The second network device corresponds to the target handover cell.

41. A channel state information transmission device, applied to a terminal, the device comprising: The first receiving unit is configured to receive at least one reported configuration sent by the first network device; Each of the above reporting configurations is associated with at least one Channel State Information Reference Signal (CSI-RS), and each of the above reporting configurations corresponds to at least one candidate cell; The second receiving unit is configured to receive cell handover signaling sent by the first network device; the cell handover signaling is used to determine at least one of the following: a target handover cell in at least one candidate cell, a target reporting configuration in at least one reporting configuration, and a target CSI-RS in the CSI-RS associated with at least one reporting configuration. The first transmitting unit is configured to transmit Channel State Information (CSI) corresponding to the target reporting configuration and the target CSI-RS to the second network device according to the cell handover signaling; the second network device corresponds to the target handover cell.

42. A channel state information transmission device, applied to a first network device, the device comprising: The third sending unit is used to send at least one reporting configuration to the terminal; Each of the above reporting configurations is associated with at least one CSI-RS, and each of the above reporting configurations corresponds to at least one candidate cell; The fourth sending unit is used to send cell handover signaling to the terminal; the cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration.

43. A channel state information transmission device, applied to a second network device, the device comprising: The sixth receiving unit is used to receive the CSI corresponding to the target reporting configuration and the target CSI-RS sent by the terminal according to the cell handover signaling; The cell handover signaling is used to determine at least one of the target handover cell in at least one candidate cell, the target reporting configuration in at least one reporting configuration, and the target CSI-RS in the CSI-RS associated with the at least one reporting configuration; one reporting configuration is associated with at least one CSI-RS, and one reporting configuration corresponds to at least one candidate cell. The second network device corresponds to the target handover cell.

44. A non-transiently readable storage medium, wherein, The non-transiently readable storage medium stores a program that causes a processor to execute the channel state information transmission method according to any one of claims 1 to 25.

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