Wireless communication methods and wireless communication device

Abstract

Provided in the embodiments of the present application are wireless communication methods and a wireless communication device. A wireless communication method, executed by a user equipment, comprises: receiving a measurement signal sent by a network side device; on the basis of the measurement signal, performing measurement to obtain timing offset compensation information for a plurality of access points and channel state information for coherent joint transmission from the plurality of access points; and in the same reporting instance, reporting part or all of the timing offset compensation information and part or all of the channel state information to the network side device, and performing joint reporting on the basis of a mapping rule for information elements of each part, wherein the information elements of each part mean that said part or all of the timing offset compensation information and said part or all of the channel state information, that are reported, are divided and mapped to different reporting parts in the reporting instance.

Description

Wireless communication methods and wireless communication devices Technical Field

[0001] This application relates to the field of mobile communication technology, specifically to a wireless communication method and a wireless communication device. Background Technology

[0002] In existing wireless communication systems, when a User Equipment (UE) moves from one cell to another, a handover to the serving cell is required. Prior to 3GPP Third Generation Partnership Project Release 18 (Rel-18), this handover was triggered by Layer 3 (L3) measurements, involving a complete Layer 2 (L2) reset, resulting in long delays and outages. Rel-18 introduced Layer 1 / Layer 2 triggered mobility (LTM), reducing latency, but it is limited to cells within the same base station, restricting application scenarios. Furthermore, the L1 measurements used by LTM do not support event-triggered reporting, and the measurement type is limited to Synchronization Signal Blocks (SSBs), unable to extend to Channel State Information Reference Signals (CSI-RS). In distributed multiple-input multiple-output (MIMO) systems with multiple access points, existing systems assume ideal synchronization between transmission and reception points (TRPs). However, in reality, latency, frequency, and phase deviations exist, impacting performance. Therefore, it is necessary to optimize the LTM reporting content, beam indication method, and handover management of service access points to support efficient handover and coherent transmission between more access points.

[0003] Summary of the Invention

[0004] This application provides a wireless communication method and a wireless communication device.

[0005] This application provides a wireless communication method executed on a user equipment, comprising: receiving a measurement signal sent by a network-side device; performing a measurement based on the measurement signal to obtain time offset compensation information of multiple access points and channel state information of the coherent joint transmission of the multiple access points; reporting part or all of the time offset compensation information and part or all of the channel state information to the network-side device in the same reporting instance; and jointly reporting according to the mapping rules of each part of the information elements, wherein each part of the information elements refers to the part or all of the time offset compensation information and part or all of the channel state information being reported being divided and mapped to different reporting parts in the reporting instance.

[0006] The above technical solutions enable user equipment to support jointly reported time offset compensation information and coherently jointly transmitted channel state information, reducing reporting overhead and enhancing system robustness.

[0007] This application provides a wireless communication method executed on a user equipment, comprising: receiving configuration information and measurement signals of multiple access points sent by a network-side device; performing measurements based on the measurement signals to generate measurement results; and reporting the measurement results to the network-side device, including: reporting measurement results of some or all access points to the network-side device in the same reporting instance; receiving access point update indication information sent by the network-side device; the user equipment disconnecting from some or all serving access points according to the access point update indication information; and establishing connections with some or all candidate access points according to the access point update indication information.

[0008] The above technical solutions enable user equipment to support mobility management when connecting to multiple access points, improve the utilization efficiency of measurement resources, reduce reporting overhead, and enhance system robustness.

[0009] This application provides a wireless communication method executed on a network-side device, comprising: sending a measurement signal to a user equipment; receiving time offset compensation information of multiple access points fed back by the user equipment based on the measurement signal and channel state information coherently transmitted by the multiple access points; in the same reporting instance, receiving part or all of the time offset compensation information and part or all of the channel state information reported by the user equipment; and parsing the jointly reported information according to the mapping rules of each part of the information elements, wherein each part of the information elements refers to the part or all of the reported time offset compensation information and part or all of the channel state information being divided and mapped to different reporting parts in the reporting instance.

[0010] The above technical solutions enable user equipment to support jointly reported time offset compensation information and coherently jointly transmitted channel state information, reducing reporting overhead and enhancing system robustness.

[0011] This application provides a wireless communication method executed on a network-side device, including: sending configuration information and measurement signals of multiple access points to a user equipment, and receiving measurement results reported by the user equipment, including: in the same reporting instance, receiving measurement results of some or all access points reported by the user equipment, sending access point update indication information to the user equipment to instruct the user equipment to disconnect from some or all service access points and establish connections with some or all candidate access points.

[0012] The above technical solutions enable user equipment to support mobility management when connecting to multiple access points, improve the utilization efficiency of measurement resources, reduce reporting overhead, and enhance system robustness.

[0013] This application provides a wireless communication device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the wireless communication method described above.

[0014] This application provides a user equipment including a processor and a memory. The memory stores a computer program, and the processor calls and runs the computer program stored in the memory to perform the aforementioned wireless communication method.

[0015] This application provides a base station, including a processor and a memory. The memory stores a computer program, and the processor calls and runs the computer program stored in the memory to perform the wireless communication method described above.

[0016] This application provides a chip for implementing the above-described wireless communication method.

[0017] Specifically, the chip includes a processor for calling and running a computer program from a memory, causing a device equipped with the chip to perform the aforementioned wireless communication method.

[0018] This application provides a computer-readable storage medium for storing a computer program that causes a computer to perform the wireless communication method described above.

[0019] This application provides a computer program product, including computer program instructions that cause a computer to execute the above-described wireless communication method.

[0020] This application provides a computer program that, when run on a computer, causes the computer to perform the above-described method.

[0021] The above technical solution has the following advantages: it enables user equipment to support jointly reported time offset compensation information and coherently jointly transmitted channel state information, reduces reporting overhead, and enhances system robustness. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 is a schematic diagram of a MAC CE format;

[0024] Figure 2 is a schematic diagram of a wireless communication system architecture provided in an embodiment of this application;

[0025] Figure 3A is a flowchart illustrating a wireless communication method provided in an embodiment of this application;

[0026] Figure 3B is a flowchart illustrating a wireless communication method provided in an embodiment of this application;

[0027] Figure 3C is a schematic diagram of the process for jointly reporting time offset compensation information and Coherent Joint Transmission (CJT) Channel State Information (CSI) according to an embodiment of this application.

[0028] Figure 3D is a schematic diagram of the mapping order of time offset compensation information in uplink control information (UCI) provided in an embodiment of this application;

[0029] Figure 3E is a schematic diagram of the mapping order of time offset compensation information in UCI provided by an embodiment of this application;

[0030] Figure 3F is a schematic diagram of the mapping order of time offset compensation information in UCI provided by an embodiment of this application;

[0031] Figure 3G is a schematic diagram of the mapping order of time offset compensation information in UCI provided in an embodiment of this application;

[0032] Figure 3H is a schematic diagram of the mapping order of time offset compensation information in UCI provided by an embodiment of this application;

[0033] Figure 3I is a schematic diagram of the mapping order of time offset compensation information in UCI provided by an embodiment of this application;

[0034] Figure 4A is a flowchart illustrating a wireless communication method provided in an embodiment of this application;

[0035] Figure 4B is a flowchart illustrating a wireless communication method provided in an embodiment of this application;

[0036] Figure 4C is a schematic diagram of an access point update based on L1 measurement provided in an embodiment of this application;

[0037] Figure 4D is a schematic diagram of a user equipment transmitting time offset compensation indication information and measurement results in a reporting instance according to an embodiment of this application;

[0038] Figure 4E is a schematic diagram of a user equipment transmitting time offset compensation indication information and measurement results in a reporting instance according to an embodiment of this application;

[0039] Figure 4F is a schematic diagram of a user equipment transmitting time offset compensation indication information and measurement results in a reporting instance according to an embodiment of this application;

[0040] Figure 4G is a schematic diagram of a user equipment transmitting time offset compensation indication information and measurement results in a reporting instance according to an embodiment of this application;

[0041] Figure 4H is a schematic diagram of a user equipment transmitting time offset compensation indication information and measurement results in a reporting instance according to an embodiment of this application;

[0042] Figure 4I is a schematic diagram of a user equipment transmitting time offset compensation indication information and measurement results in a reporting instance according to an embodiment of this application;

[0043] Figure 4J is a schematic diagram of a network-side indicator for updating the access point provided in an embodiment of this application;

[0044] Figure 4K is a schematic diagram of a network-side indicator for updating the access point provided in an embodiment of this application;

[0045] Figure 4L is a schematic diagram of a network-side indicator for updating the access point provided in an embodiment of this application;

[0046] Figure 4M is a schematic diagram of a network-side indicator for updating the access point provided in an embodiment of this application;

[0047] Figure 4N is a schematic diagram of a network-side indicator for updating the access point provided in an embodiment of this application;

[0048] Figure 40 is a schematic diagram of a network-side indicator for updating the access point provided in an embodiment of this application;

[0049] Figure 4P is a schematic diagram of a network-side indicator for updating the access point provided in an embodiment of this application;

[0050] Figure 4Q is a schematic diagram of a mapping rule for multiple CSI reporting content under LTM provided in an embodiment of this application;

[0051] Figure 4R is a schematic diagram of a mapping rule for multiple CSI reporting content under LTM provided in an embodiment of this application;

[0052] Figure 4S is a schematic diagram of a mapping rule for multiple CSI reporting content under LTM provided in an embodiment of this application;

[0053] Figure 4T is a schematic diagram of a mapping rule for multiple CSI reporting content under LTM provided in an embodiment of this application;

[0054] Figure 4U is a schematic diagram of a mapping rule for multiple CSI reporting content under LTM provided in an embodiment of this application;

[0055] Figure 4V is a schematic diagram of a mapping rule for multiple CSI reporting content under LTM provided in an embodiment of this application;

[0056] Figure 5 is a schematic structural diagram of a wireless communication device provided in an embodiment of this application;

[0057] Figure 6 is a schematic structural diagram of a chip according to an embodiment of this application;

[0058] Figure 7 is a schematic block diagram of a wireless communication system provided in an embodiment of this application. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0060] When a User Equipment (UE) moves from the coverage area of ​​one cell to another, a serving cell handover is required at some point. Prior to Rel-18, serving cell handover was triggered by Layer 3 (L3) measurements and completed through reconfiguration and synchronization triggered by Radio Resource Control (RRC) signaling. This involved changes to the Primary Cell (PCell) and Primary Secondary Cell (PSCell), as well as the release and addition of Secondary Cells (SCells) where applicable. This process involved a complete Layer 2 (L2) and Layer 1 (L1) reset, resulting in longer latency, greater overhead, and longer downtime compared to beam-based mobility handover.

[0061] 3GPP Release 18 (3GPP Rel-18) introduced Layer 1 / Layer 2 triggered mobility (LTM), which offers improvements in handover latency and downtime compared to L3 measurement-triggered mobility. However, LTM introduced in Rel-18 also has several limitations. For example, LTM operation only supports mobility between cells within the same gNB (gNodeB, i.e., the same Central Unit, CU). Depending on network deployment, this can significantly limit LTM usage opportunities. By enabling LTM operation between cells across different gNBs (i.e., across Central Units, CUs), the network will be able to reap the benefits of LTM in more handovers.

[0062] Furthermore, L3 mobility uses L3 measurement reporting, supporting UE evaluation events to trigger measurement result reporting, which reduces signaling overhead compared to periodic measurement reporting. L1 measurements used by LTM mobility do not support such event triggering.

[0063] L1 measurements in LTM procedures are limited to Synchronization Signal Block (SSB) measurements. Extending L1 measurements to include Channel State Information-Reference Signal (CSI-RS) can overcome this limitation and promise higher throughput in the target cell immediately after cell handover. L3 mobility has evolved across multiple versions. Conditional Handover (CHO) and other Conditional Mobility Procedures (Conditional PSCell Addition / Change, CPAC, Secondary Conditional PSCell Addition / Change, SCPAC) have been developed to achieve high robustness through procedures that do not require prior signaling exchange with the source cell. LTM introduced in Rel-18 provides short downtime but does not achieve the same robustness as condition-based L3 mobility procedures. In Rel-19, several enhancements need to be standardized so that the system can benefit from both high robustness and reduced downtime.

[0064] In scenarios involving coherent joint transmission among multiple Transmission Reception Points (TRPs), Rel-18 assumes ideal synchronization among the TRPs. However, in real-world systems, achieving ideal synchronization among multiple TRPs is often difficult, which severely degrades the performance of coherent joint transmission. The main factors leading to non-ideal synchronization among multiple TRPs include delay skew, frequency skew, and phase skew. Therefore, to better support coherent joint transmission among multiple cooperating entities, these skews need to be compensated for to achieve better performance.

[0065] eType II Coherent Joint Transmission (CJT) codebook: The eType II Precoding Matrix Indicator (PMI) adopts a three-level codebook architecture. Where W1∈C P×2L Represents the spatial basis matrix. These are the projection coefficients obtained by projecting the precoding matrix onto the basis matrices in the spatial and frequency domains. It is the frequency domain basis matrix, where P represents the number of antenna ports, L represents the number of spatial basis vectors selected for a single polarization direction, and M... vN represents the number of frequency domain basis vectors corresponding to the v-th layer, and N3 represents the number of PMI subbands. In the above codebook architecture, the dimensional information of different matrices is partly or entirely indicated by the base station to the user equipment (UE), for example, L, M... v The base station indicates the number of user equipment (UE) bases in the spatial frequency domain through codebook parameter combinations, as well as a control factor for the number of non-zero coefficients reported by the UE. According to the 3GPP Rel-18 standard, for eType-II CJT codebooks based on 3GPP Rel-16 and CJT codebooks based on 3GPP Rel-17 FeType-II (Release 17 further enhanced Type II) port selection, the reporting of Channel State Information (CSI) is divided into two parts: Part 1 and Part 2. Part 1 mainly includes the Rank Indicator (RI), Channel Quality Indicator (CQI), the total number of cross-layer non-zero amplitude coefficients, the bitmap information corresponding to the selected N CSI-Reference Signal (CSI-RS) resources, and the selected... The combination of these elements, and the aforementioned content is independently encoded. The first part mainly contains the PMI of the CJT codebook based on Rel-16eType-II and the CJT codebook based on Rel-17 FeType-II port selection.

[0066] In CJT non-ideal backhaul scenarios, the main content of time offset measurement reporting includes the reference resource or resource set index nref, and the time offset compensation value {D} corresponding to the CSI-RS or TRP resource set ID from low to high. n,offset n = 0, 1, ..., N TRP -1,n≠nref}, and indication information {dn,n=0,1,…,N} corresponding to the time offset compensation values ​​from low to high CSI-RS or TRP resource set IDs, indicating whether they exceed a certain range. TRP -1, n≠nref}, this indicator corresponds to N TRP -1 bit, each bit indicating whether the time offset value plus delay spread measured for the resource set corresponding to the TRP is within a predetermined range. The above D n,offset The time offset value of the nth CSI-RS resource / resource set relative to the reference CSI-RS resource / resource set is represented by B bits, and D... n,offset The indicated value is the time delay offset falling within [δ] i ,δ i+1The time interval is ). It is from 0 to A D The uniform interval between them, for example i = 0, 1, ..., M D -1, where M D =2 B and This indicates that the range is exceeded. Furthermore, A... D The values ​​of M include {0.5CP, CP}, while M D The value can be any one of {128, 256}. Furthermore, the mapping rule for reporting time offset information is that when ReportQuantity is 'cjtc-Dd'(Doffset+d), the mapping order is nref, {D... n,offset n = 0, 1, ..., N TRP -1, n≠nref} and {d n n = 0, 1, ..., N TRP -1,n≠nref}.

[0067] The main content of frequency offset measurement reporting in CJT non-ideal backhaul scenarios includes the reference resource or resource set index nref, and the frequency offset compensation value {FO} corresponding to the CSI-RS or TRP resource set ID from low to high. n n = 0, 1, ..., N TRP -1, n ≠ nref}. FO n The value ranges from 0 to A. FO The frequency offset is uniformly quantized between reference CSI-RS resources / resource set nref. Assuming the value of FONref is 0, it is not reported. i = 0, 1, ..., M FO -2, Indicates an invalid state, M FO ={16,32}.

[0068] The LTM reporting content based on the Synchronization Signal Block (SSB) in NR is determined by the number of cells indicated by the network-side equipment and the user equipment's own selection. The network-side equipment instructs the user equipment to report L cells, with each cell reporting Physical Layer 1 (L1) measurement data corresponding to M beams. The user equipment selects L cells based on the network-side equipment's instructions and reports measurement data for each of the M beams. The network-side equipment configuration determines whether the serving cell is included among the reported L cells.

[0069] In New Radio (NR) systems, cell handover in LTM scenarios is transmitted via a Media Access Control (MAC) Control Element (MAC CE). The specific MAC CE format is shown in Figure 1.

[0070] The MAC CE handover command mainly includes the following: (1) R field: The R field is a reserved bit and is set to 0. (2) Target Configuration ID: This field indicates the index of the candidate target configuration, which is used for LTM cell handover. It corresponds to ltm-CandidateId specified in TS 38.331 minus 1, and the field length is 3 bits. (3) Timing Advance Command: This field indicates whether the timing advance TA is valid for the LTM target cell (i.e., the SpCell indicated by the target configuration ID field). If the value of this field is set to FFF, it means that there is no valid timing adjustment available. Otherwise, it indicates the TA index value used to control the amount of timing adjustment applied by the MAC entity in TS 38.213. The UE can skip the random access procedure for this LTM cell handover. If tag-Id-ptr is configured for the TCI state indicated by the TCI state ID field in the LTM target cell and tag-Id-ptr is set to the value n1, then this field indicates the TA of the TAG indicated by tag2-Id of the LTM target cell; otherwise, it indicates the TA of the TAG indicated by tag-id of the LTM target cell. The field length is 12 bits. (4) TCI State ID: This field indicates and activates the TCI state of the LTM target cell (i.e., the SpCell indicated by the target configuration ID field). (5) UL TCI State ID: This field indicates and activates the uplink TCI state of the LTM target cell (i.e., the SpCell indicated by the target configuration ID field). (6) C: This field indicates the presence of the contention-free random access resource field. If the value of this field is set to 1, then the following fields are present: random access preamble index field, S / U field, SS / PBCH index field, PRACH mask index field, repetition count field, and reserved bits in the same octet. If the value of this field is set to 0, these fields do not exist. (7) S / U: This field indicates on which uplink carrier the PRACH for contention-free random access resources will be transmitted. If the value of this field is set to 1, SUL is used; otherwise, NUL is used. The length of this field is 1 bit. (8) Random Access Preamble Index: This field indicates the random access preamble index for contention-free random access resources. This field should not be set to 0b000000. The field length is 6 bits. (9) SS / PBCH Index: This field indicates the SS / PBCH used to determine the timing of RACH transmission for contention-free random access resources. The field length is 6 bits.(10) PRACH Mask Index: This field indicates the RACH timing associated with the SS / PBCH indicated by the SS / PBCH index, used for PRACH transmissions on contention-free random access resources. (11) Repetition Number: This field indicates the number of Msg1 repetitions applied to contention-free random access. If this field is set to 0, no Msg1 repetition is applied. If set to 1, the Msg1 repetition number is 2. If set to 2, the Msg1 repetition number is 4. If set to 3, the Msg1 repetition number is 8. The field length is 2 bits.

[0071] Before introducing the specific solutions of this application, some concepts and terms mentioned in some embodiments of this application that are applicable to the entire solution will be explained.

[0072] In the embodiments of this application, for the case where the user equipment (UE) is connected to multiple access points, the access points mentioned here can refer to multiple transmission reception points (TRPs), specifically the scenario of multiple TRP coherent joint transmission in the standard; or multiple antenna arrays or modules, specifically corresponding to multiple antenna arrays or antenna modules under distributed multiple input multiple output (MIMO), or multiple Wi-Fi access points; or it can be extended to multiple frequency bands, that is, each frequency band can be regarded as an access point, or multiple carriers within the same frequency band can be regarded as an access point, specifically the scenario of multi-carrier aggregation.

[0073] Access point identification can be mapped to the identifier (ID) of a cell or cell group, meaning each access point corresponds to one cell and is associated with a cell ID, or multiple access points are associated with a cell group. Access point identification can also be mapped to the ID of a measurement resource, multiple measurement resources, a measurement resource group, a subset of measurement resources, or a set of measurement resources, meaning each access point corresponds to the ID of one measurement resource, multiple measurement resources, a measurement resource group, a subset of measurement resources, or a set of measurement resources, and these access points may correspond to the same cell ID or cell group ID.

[0074] A serving access point refers to the access point currently connected to the UE; a candidate access point refers to an access point that has not yet established a connection with the UE but may establish a connection with the UE based on signal measurements. Access point updates can be understood as the UE disconnecting from some or all serving access points and / or establishing connections with some candidate access points.

[0075] Furthermore, the embodiments of this application mention the measurement of channel quality. This channel quality can be based on measured reference signal received power (RSRP), reference signal received quality (RSRQ), signal-to-interference-plus-noise ratio (SINR), received signal strength indicator (RSSI), delay deviation, phase deviation, frequency deviation, or path loss, etc. Specific channel measurement resources can be synchronization signal blocks (SSBs), demodulation reference signals (DMRS), channel state information reference signals (CSI-RS), tracking reference signals (TRS), CSI intermediate reference signals (CSI-IM), or other measurement reference information; no specific limitations are imposed here. Therefore, the scheme described in this application is also applicable to the aforementioned measurement quantities and / or measurement resources.

[0076] In the embodiments of this application, the new CSI refers to the CSI jointly reported by the time offset compensation information and the CJT CSI, while the original CSI refers to the CJT CSI.

[0077] In summary, the solution described in this application is applicable to the scenarios mentioned above, and is applicable to New Radio (NR) and future communication systems, such as sixth-generation mobile communication technology (6G) and seventh-generation mobile communication technology (7G), as well as WiFi or other similar communication systems.

[0078] Some embodiments of this application primarily relate to mobility management in Distributed Multiple Input Multiple Output (MIMO) systems, aiming to further improve the performance of User Equipment (UE) during mobility. In a distributed MIMO system, multiple Transmission Reception Points (TRPs) or antenna modules are distributed in different physical locations. UEs require efficient access point management during mobility to ensure communication quality and system performance stability. Through embodiments of this application, this paper explores how to optimize the access point update and selection mechanism during UE mobility, thereby reducing channel measurement overhead, shortening handover latency, and improving system robustness and reliability. This application also proposes optimization methods in multi-TRP coherent joint transmission scenarios to ensure efficient joint transmission performance. These embodiments cover how to achieve faster response and lower downtime during the addition, reduction, or handover of access points, meeting the high requirements of future New Radio (NR) and subsequent communication technologies (such as 6G and 7G). These methods are also applicable to other communication systems such as WiFi to ensure a smooth transition and efficient connection for user devices in multi-access point environments.

[0079] The technical solutions of this application can be applied to various wireless communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, 5G communication systems, or future wireless communication systems.

[0080] For example, the wireless communication system 100 used in this application embodiment is shown in FIG2. The wireless communication system 100 may include a network-side device 110, which may be a device communicating with a user equipment (UE) 120. The network-side device 110 can provide communication coverage for a specific geographical area and can communicate with user equipment located within that coverage area. Optionally, the network-side device 110 may be a base station or a Location Management Function (LMF) for providing location services. Optionally, the base station may be an evolved Node B (eNB or eNodeB) in an LTE system, or the base station may be a mobile switching center, relay station, access point, vehicle-mounted equipment, wearable device, hub, switch, bridge, router, network equipment in a 5G network, or a base station in a future communication system, etc.

[0081] The wireless communication system 100 also includes at least one user equipment 120 located within the coverage area of ​​the network-side device 110. As used herein, "user equipment" includes, but is not limited to, devices configured to receive / transmit communication signals via wired connections, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as for cellular networks, Wireless Local Area Networks (WLAN), digital television networks such as DVB-H networks, satellite networks, AM-FM broadcast transmitters; and / or other user equipment. User equipment configured to communicate via a wireless interface may be referred to as a "wireless communication terminal," "wireless terminal," or "mobile terminal." Examples of mobile terminals include, but are not limited to, satellite or cellular phones; personal communications system (PCS) terminals that can combine cellular radiotelephone with data processing, fax, and data communication capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices that include radiotelephone transceivers. User equipment can refer to access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote user equipment, mobile devices, wireless communication equipment, or user agents. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to a wireless modem, in-vehicle equipment, wearable devices, user equipment in 5G networks, or user equipment in future PLMN evolutions, etc.

[0082] In some embodiments of this application, a wireless communication method, executed on a user equipment 120, includes: receiving a measurement signal sent by a network-side device 110; performing measurements based on the measurement signal to obtain time offset compensation information of multiple access points and channel state information of the multiple access points coherently transmitted jointly; and, in the same reporting instance, reporting part or all of the time offset compensation information and part or all of the channel state information to the network-side device 110, and jointly reporting according to the mapping rules of each part of the information elements. Here, each part of the information elements refers to the reported part or all of the time offset compensation information and part or all of the channel state information being divided and mapped to different reporting parts in the reporting instance. Through the above technical solution, the user equipment 120 supports jointly reported time offset compensation information and coherently transmitted jointly transmitted channel state information, reducing reporting overhead and enhancing system robustness.

[0083] In some embodiments of this application, a wireless communication method, executed by a user equipment 120, includes: receiving configuration information and measurement signals of multiple access points sent by a network-side device 110; performing measurements based on the measurement signals to generate measurement results; and reporting the measurement results to the network-side device 110. This includes: reporting measurement results of some or all access points to the network-side device 110 in the same reporting instance; receiving access point update indication information sent by the network-side device 110; and the user equipment 120 disconnecting from some or all serving access points according to the access point update indication information, and establishing connections with some or all candidate access points according to the access point update indication information. Through the above technical solution, the user equipment 120 supports mobility management when connecting to multiple access points, improves the utilization efficiency of measurement resources, reduces reporting overhead, and enhances system robustness.

[0084] Optionally, the wireless communication system 100 also includes a network 130. The network 130 can refer to the current serving cell, a candidate cell, a primary serving cell, or a secondary cell.

[0085] Optionally, user equipment 120 can perform device-to-device (D2D) communication with each other.

[0086] Alternatively, 5G communication systems or 5G networks may also be referred to as New Radio (NR) systems or NR networks.

[0087] Optionally, the wireless communication system 100 also includes a network 130. The network 130 may be an IP mobile communication network operated by a mobile communication operator. For example, the network 130 may be the core network used by the mobile communication operator to operate and manage the wireless communication system 100, or it may be the core network used by a virtual mobile communication operator such as an MVNO (Mobile Virtual Network Operator).

[0088] Network 130 can be connected to network-side device 110 as a relay device for transmitting user data. User equipment 120 sends and receives user data via network 130. It should be noted that user data communication is not limited to IP communication, but can also be non-IP communication.

[0089] Figure 2 exemplarily illustrates a network-side device 110, two user devices 120, and a network 130. Optionally, the wireless communication system 100 may include multiple network devices, and each network device may include other numbers of user devices within its coverage area. This application embodiment does not limit this.

[0090] Optionally, the wireless communication system 100 may also include other network entities such as a network controller, a mobility management entity, and network elements; this application embodiment does not limit this. For example, network 130 may include other network entities such as a network controller, a mobility management entity, and network elements; this application embodiment does not limit this.

[0091] It should be understood that devices with wireless communication functions in the network / system of this application embodiment can be referred to as wireless communication devices. Taking the wireless communication system 100 shown in FIG2 as an example, the wireless communication device may include a network-side device 110, a user equipment 120, and a network 130 with communication functions. The network-side device 110 and the user equipment 120 can be the specific devices described above, which will not be repeated here. The wireless communication device may also include other devices (network 130) in the wireless communication system 100. For example, the network 130 may include other network entities such as a network controller and a mobility management entity. This is not limited in this application embodiment.

[0092] It should be understood that the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship. In some embodiments, the term "configuration" can refer to "pre-configuration" and "network configuration." The terms "definition" or "pre-defined" in the embodiments of this application can be implemented by pre-storing corresponding codes, tables, or other information indicative indices in the device (e.g., including UE and network devices). This application does not limit specific implementations. For example, "definition" or "pre-defined" can refer to those defined in a protocol. It should also be understood that "protocol" in this invention can refer to standard protocols in the field of communications, such as Long Term Evolution (LTE) protocols, new radio (NR) protocols, and related protocols used in future communication systems. This application does not limit this.

[0093] The main technical features of some embodiments of this application include the following aspects:

[0094] First, during the User Equipment (UE) reporting process, time offset compensation information and coherently transmitted Channel State Information (CSI) are considered to be reported by default in a single reporting instance, thereby reducing the UE's reporting overhead. Simultaneously, this application proposes that time offset compensation information can be mapped independently or jointly with CSI information elements in the reporting instance, and the priority is determined according to different mapping methods. This method ensures that even in the event of partial loss of CSI information, time offset compensation information can still be used to effectively compensate for the recovered precoding.

[0095] Secondly, this application proposes a method for reporting delay deviation information and L1 measurement results of multiple access points in a single reporting instance when a user equipment connects to multiple access points for Layer 1 / Layer 2 triggered mobility (LTM). This allows the network side to make more reliable service access point update decisions based on this data. By using a two-level indication mechanism, specific service access points are dynamically instructed to report measurement results and beam indices, thereby reducing the UE's reporting overhead. Furthermore, through three types of access point update status indications and configured configuration identifiers (Config IDs), the UE is informed to disconnect from specific service access points and establish connections with candidate access points, thereby enhancing the system's flexibility and reliability during the access point update process.

[0096] These embodiments are applicable not only to New Radio (NR) systems, but also to future communication systems such as sixth-generation (6G) and seventh-generation (7G) mobile communication technologies, as well as similar multi-access point communication systems.

[0097] Some embodiments of this application enable User Equipment (UE) to support joint reporting of time offset compensation information and Channel State Information (CSI) for Coherent Joint Transmission (CJT). Based on this, some embodiments of this application have the following beneficial effects: (1) Reduced reporting overhead of the User Equipment: By omitting some time offset compensation information or CJT CSI information in a single reporting instance, the reporting overhead of the UE is reduced while ensuring that the base station can correctly parse the information. (2) Enhanced system robustness: By specifying the mapping rules and priorities of time offset compensation information and CSI in the same reporting instance, some information can be discarded under resource constraints, while ensuring that the time offset compensation information can correctly compensate for the precoding recovered after discarding some information. This ensures normal system operation and reduces performance loss caused by the asynchrony of multiple Transmission Reception Points (TRPs), thereby enhancing system robustness.

[0098] Some embodiments of this application also support mobility management based on L1 measurement reporting when the UE is connected to multiple access points. Based on this, some embodiments of this application also have the following beneficial effects: (1) Improved utilization efficiency of measurement resources: By simultaneously measuring channel quality and time offset information, the effectiveness of introducing new access points and deleting service access points is ensured, guaranteeing that multiple access points connected to the UE can participate in cooperative transmission to the maximum extent, reducing the waste of measurement resources caused by unsuitable access points, and improving the utilization efficiency of measurement resources. (2) Reduced reporting overhead of user equipment: By selectively reporting the measurement quantities of some service access points and using a two-level indication method to report beam indexes, the reporting overhead of the UE is reduced. (3) Improved system robustness: By measuring and reporting L1 measurements under multiple access points, the network side can determine which service access points the UE should disconnect from and which candidate access points should establish connections with, ensuring that the access points connected to the UE can participate in cooperative transmission to the maximum extent, avoiding performance loss due to changes in service access points. Decision-making based on L1 measurements improves the efficiency of access point updates compared to decision-making based on L3 measurements, and avoids system performance degradation caused by untimely access point updates.

[0099] Some embodiments of this application first provide a scheme for jointly reporting Channel State Information (CSI) and Time Offset Compensation Information in coherent joint transmission of multiple Transmission Reception Points (TRPs) to reduce the reporting overhead of User Equipment (UE). The application also describes in detail the mapping rules and related priority settings of these two parts of information in a single reporting instance after reducing the overhead. This part corresponds to the first solution.

[0100] Secondly, considering the importance of time offset compensation information in ensuring coherent joint transmission performance, some embodiments of this application combine time offset compensation information with L1 measurement information for mobility management of multi-access point UEs. Then, a serving access point selection and reporting mechanism, a scheme to reduce UE reporting overhead through two-level beam indication, a method for determining joint reporting content, and access point update indication based on potential update states are provided; this part corresponds to the second solution.

[0101] To facilitate understanding of the technical solutions of the embodiments of this application, the first solution and the second solution will be described below.

[0102] The first solution is to jointly report time offset compensation information and Coherent Joint Transmission (CJT) Channel State Information (CSI) in the same reporting instance.

[0103] The first solution in this application addresses the following technical problems.

[0104] Technical issues: Mapping rules, reporting priorities, and how to reduce reporting overhead when time offset compensation and CJT CSI are jointly reported.

[0105] Some embodiments of this application relate to the optimization of joint reporting of time offset calibration (TACC) reports and CJT CSI. Based on the current discussions in 3GPP Rel-19, independent or joint reporting of TACC reports and CJT CSI may be supported. When these two types of information are jointly reported in a reporting instance, the TACC reports are used to compensate for the jointly reported CSI information. Current standards do not support simultaneous reporting of both; therefore, some embodiments of this application consider rules for mapping TACC reports in CSI, as well as the reporting priorities under different mapping rules and how to reduce user equipment (UE) reporting overhead. For example, CSI can be divided into Part 1 and Part 2 information. Some embodiments of this application explore rules for mapping TACC reports to these two parts respectively, or rules for partially mapping to Part 1 and partially to Part 2. Different mapping rules may directly or indirectly determine the reporting priority or discarding rules of TACC compensation information.

[0106] Furthermore, joint reporting means that a single reporting instance consumes more reporting resources. Some embodiments of this application take into account the correlation between time offset compensation reporting information and certain indication information in CSI information. For example, in the selection indication information of Transmission Reception Point (TRP), the TRPs participating in the cooperation can be considered to have time offset compensation information within a predefined range, thus partially omitting indication information regarding exceeding the range. Alternatively, the user equipment only needs to report the time offset compensation information of the participating TRPs relative to the reference resource or resource set, thereby reducing reporting overhead.

[0107] Based on the aforementioned technical problems, some embodiments of this application propose a first solution. First, a scheme to reduce the reporting overhead of user equipment is given for the joint reporting of CSI and time offset compensation information by multi-TRP coherent joint transmission, and a mapping rule for the two parts of information in a reporting instance after the overhead reduction.

[0108] In some embodiments, FIG3A is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The wireless communication method is executed on a user equipment and includes at least one of the following steps: Operation 301A: receiving a measurement signal sent by a network-side device; Operation 302A: performing a measurement based on the measurement signal to obtain time offset compensation information of multiple access points and channel state information of the coherent joint transmission of the multiple access points; and Operation 303A: in the same reporting instance, reporting part or all of the time offset compensation information and part or all of the channel state information to the network-side device, and jointly reporting according to the mapping rules of each part of the information element, wherein each part of the information element refers to the part or all of the time offset compensation information and part or all of the channel state information being reported being divided and mapped to different reporting parts in the reporting instance.

[0109] In some embodiments, FIG3B is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The wireless communication method is executed on a network-side device and includes at least one of the following steps: Operation 301B: sending a measurement signal to a user equipment; Operation 302B: receiving time offset compensation information of multiple access points fed back by the user equipment based on the measurement signal and channel state information coherently jointly transmitted by the multiple access points; and Operation 303B: in the same reporting instance, receiving part or all of the time offset compensation information and part or all of the channel state information reported by the user equipment, and parsing the jointly reported information according to the mapping rules of each part of the information elements, wherein each part of the information elements refers to the part or all of the reported time offset compensation information and part or all of the channel state information being divided and mapped to different reporting parts in the reporting instance.

[0110] In some embodiments of this application, a reporting instance refers to a data transmission process in which a user equipment sends measurement results or status information to a network-side device. In the scenario of coherent joint transmission of the multiple access points, the user equipment needs to report important information related to its communication performance, such as channel state information (CSI) and time offset compensation information.

[0111] In a reporting instance, user equipment (UE) can organize and package different categories of information according to predetermined mapping rules, and then send them uniformly to network-side devices. This process aims to enable network-side devices to process measurement data from UEs more efficiently, and to perform network optimization and resource scheduling. Specifically, a reporting instance can include the following: Joint reporting of CSI and time offset compensation information: In a reporting instance, UEs simultaneously send CJT CSI and time offset compensation information, which helps the network side optimize precoding and transmission strategies in multi-TRP joint transmission scenarios. Information mapping and prioritization: In a reporting instance, CSI and time offset compensation information can be divided into different parts (such as Part 1 and Part 2), and each part places corresponding information elements according to mapping rules. The setting of mapping rules and information priorities helps determine which information can be prioritized and which can be discarded when resources are limited. Reducing reporting overhead: The reporting instance is designed to optimize data volume and reduce the overhead of UEs in the feedback process. For example, by simplifying the format and priority control of time offset compensation information, the transmission burden can be reduced while maintaining the integrity of necessary information. Reporting instances is the core mechanism for ensuring information transmission between user equipment and network-side equipment. With proper design, the robustness and performance of the system can be enhanced, especially in highly complex distributed MIMO and multi-access point communication scenarios.

[0112] In some embodiments of this application, reporting partial information refers to reporting only a portion of the information by default, or reporting specific information rather than all information, in order to reduce reporting overhead while ensuring effective compensation for precoding.

[0113] Figure 3C is a schematic diagram illustrating the joint reporting process of time offset compensation information and Coherent Joint Transmission (CJT) Channel State Information (CSI) according to an embodiment of this application. Some embodiments of this application are based on the latest discussions in the 3GPP Rel-19 standard regarding Coherent Joint Transmission (CJT) with multiple Transmission Reception Points (TRPs), supporting jointly triggered time offset compensation reporting and Rel-18e Type-II CJT Channel State Information (CSI) reporting. In these embodiments, User Equipment (UE) can simultaneously report time offset compensation information and CSI in the same reporting instance, thus ensuring that the reported delay offset value can be used for compensation of the joint transmission precoding reported in the same instance.

[0114] Some embodiments of this application specifically explore information mapping rules and priority settings for joint reporting of time offset compensation information and CSI, aiming to optimize the reporting process and reduce the reporting overhead of user equipment. For example, time offset compensation information and CSI can be mapped according to their different parts in the reporting instance (such as Part 1 and Part 2), with each part assigned a corresponding priority, so as to filter and discard information when resources are limited. In addition, by reasonably setting the joint mapping rules of time offset compensation and CSI, redundant reporting can be reduced and the feedback performance of user equipment can be optimized.

[0115] The signaling interaction process between the base station and user equipment involved in some embodiments of this application is at least as shown in Figure 3C, illustrating the detailed steps of joint reporting and precoding compensation. Some embodiments of this application can improve the performance of multi-TRP joint transmission, especially in the case of non-ideal synchronization, by compensating for time skew to reduce performance loss and improve system robustness and resource utilization.

[0116] Some embodiments of this application are based on the scheme shown in FIG3C, and mainly involve the following processes:

[0117] Step 1: Predefine some rules for joint reporting of time offset compensation information and CSI: Predefine the rules for joint reporting of time offset compensation information and Coherent Joint Transmission (CJT) Channel State Information (CSI), including information mapping rules and priority settings, as well as the meaning of the reported content during joint reporting, as follows:

[0118] Mapping rules and priorities: Since CSI information is divided into Part 1 and Part 2, time offset compensation information can be reported in Group 0 of Part 2 or in a group independent of Part 2. If time offset compensation information is independent of Part 1 and Part 2 of CSI, its priority can be higher than Part 1 and Part 2, or lower than Part 1 but higher than Part 2. Time offset compensation information can also be partially located in Part 1 and partially in Part 2, for example, reference resource or resource set indication information is located in Part 1 and the rest is located in Part 2.

[0119] The meaning of the joint reporting content: The Transmission Reception Point (TRP) corresponding to the reference resource or resource set indication information in the predefined time offset compensation information participates in the cooperation; if the TRP corresponding to the measurement resource or resource set participates in coherent joint transmission, its time offset compensation value relative to the reference resource or resource set should be within a predetermined range. For specific solutions, refer to the fifth embodiment.

[0120] Step 2: Reporting the ability to jointly report time offset compensation information and CSI: The User Equipment (UE) reports to the base station the ability to jointly report time offset compensation information and CSI.

[0121] Step 3: Send configuration information: The base station sends configuration information to the UE, which includes configurations for CSI measurement, time offset measurement, and some codebook parameter configurations.

[0122] Step 4: Send measurement signals: The base station sends measurement signals to the UE, including reference signals for CSI and time offset measurements.

[0123] Step 5: Report measurement results: The UE reports time offset compensation information and CSI measurement results based on predefined rules, including at least one or more of the following information: information indicating whether the TRP corresponding to the measurement resource or resource set other than the reference resource or resource set participates in coherent cooperative transmission, and information on whether the TRP corresponding to the measurement resource or resource set whose time offset compensation value does not exceed the range participates in coherent cooperative transmission.

[0124] Step 6: Sending downlink data information. The base station calculates precoding information based on the time offset information and CSI information reported by the UE, and sends service data based on this precoding information.

[0125] Please note that the above steps are not all mandatory, nor are they the complete interaction process between the base station and the UE, but rather key steps related to the embodiments of this application. Some embodiments of this application, based on the scheme shown in Figure 3C, describe the process of joint reporting of time offset compensation information and channel state information (CSI) between the user equipment (UE) and the base station in a Coherent Joint Transmission (CJT) environment. Mapping rules, priority settings, and the meaning of the jointly reported content for time offset compensation information and CSI are predefined to ensure efficient information transmission and processing. After the UE reports its ability to support joint reporting, the base station sends relevant measurement and configuration information and measurement signals for CSI and time offset measurements. The UE reports the measurement results according to predefined rules, including information on whether a reference resource or a TRP outside the resource set participates in cooperation. Finally, the base station calculates precoding information based on the reported time offset compensation information and CSI information and sends downlink data. This process ensures synchronization between multiple access points and improves system performance.

[0126] To facilitate understanding of the technical solutions of the embodiments of this application, the technical solutions related to the embodiments of this application are described below. The technical solutions of the first embodiment, second embodiment, third embodiment, fourth embodiment, and fifth embodiment are listed below for description, but this application is not limited thereto. In some embodiments of this application, the solution of the first embodiment can be implemented in conjunction with the second embodiment, third embodiment, fourth embodiment, and / or fifth embodiment, or can be implemented independently of the solutions of the second embodiment, third embodiment, fourth embodiment, and / or fifth embodiment. In some embodiments of this application, the solutions of multiple embodiments can be combined or implemented independently.

[0127] First embodiment: Mapping rules of time offset compensation information in the first part of CSI information (Part 1).

[0128] The first embodiment proposes a scheme for joint reporting of time offset compensation information and CSI, which is applicable to the case without overhead reduction optimization, and is also applicable to the joint reporting case after overhead reduction optimization proposed in the fifth embodiment.

[0129] In some embodiments of this application, the channel state information includes a first part of information and a second part of information. The time offset compensation information is mapped to the first part of the channel state information, with the mapping order being that the time offset compensation information is located before or after the first part of the channel state information. In some embodiments of this application, when the time offset compensation information is mapped to the first part of the channel state information, the time offset compensation information is reported or discarded together with the first part of the channel state information.

[0130] In some embodiments of this application, Channel State Information (CSI) is divided into a first part and a second part, and time offset compensation information can be mapped to the first part of the CSI. The mapping order can be before or after the first part of the CSI. These mapping rules can be explained in detail with reference to Figures 3D, 3E, and 3F. In some embodiments of this application, the time offset compensation information is mapped before the first part of the CSI. In this case, the reporting order is to transmit the time offset compensation information first, and then transmit the first part of the CSI. This design can ensure that the time offset compensation information is processed first during the reporting process, improving the timeliness and accuracy of the reported data received by the network side. In some embodiments of this application, the time offset compensation information is mapped after the first part of the CSI. This order prioritizes the reporting of the first part of the CSI, with the time offset compensation information following immediately after. This mapping method is more suitable when it is necessary to maintain the priority of the original CSI information.

[0131] In some embodiments of this application, a scenario is illustrated where time offset compensation information and CSI Part 1 information are alternately mapped. Here, different elements of the time offset compensation information and CSI Part 1 information can be arranged alternately according to specific rules. For example, certain indication information in the time offset compensation information can be inserted after the rank indication in CSI Part 1 or before the sub-band CQI. This alternating mapping rule integrates the time offset compensation information without changing the original order of the CSI information, making the entire data reporting more flexible.

[0132] When the partial compensation information was reported along with the first part of the CSI information, these two pieces of information were either reported together or discarded together, ensuring information consistency and avoiding invalid data transmission and resource waste caused by reporting only partial information. This design ensured that the system could still operate normally when resources were limited or signaling conflicts occurred, thereby improving the system's reliability and reporting efficiency.

[0133] Referring to Figures 3D and 3E, Figure 3D illustrates the scenario before the time offset compensation information is mapped to the first part of the channel state information, where the time offset compensation information is reported as Information 1 and the first part of the channel state information is reported as Information 2. Figure 3E illustrates the scenario after the time offset compensation information is mapped to the first part of the channel state information, where the first part of the channel state information is reported as Information 1 and the time offset compensation information is reported as Information 2. In some embodiments, when the time offset compensation information is mapped to the first part of the channel state information, this time offset compensation information can be reported together with the first part of the channel state information or discarded under certain circumstances. This processing mechanism helps optimize the use of reporting resources and allows for flexible selection of retaining or discarding time offset compensation information when network resources are limited, ensuring overall system performance and transmission robustness.

[0134] Some embodiments of this application involve delay offset compensation schemes when time offset compensation information and CJT channel state information (CSI) are jointly triggered in a Transmission Reception Point (TRP) Coherent Joint Transmission (CJT) scenario. Specifically, when time offset compensation information and CJT CSI are jointly reported in the same reporting instance, the delay offset to be compensated comes from the delay offset value in that reporting instance. However, when time offset compensation information and CJT CSI are associated but reported separately, the compensated delay offset value is the most recently reported delay offset (DO), where the last symbol of the reporting instance must be before the first symbol triggered by the downlink control information (DCI) reported by the CJT CSI. When time offset compensation information and CJT's CSI are reported simultaneously in a single reporting instance, since CJT's CSI is divided into Part 1 and Part 2, the time offset compensation information can be completely included in CSI Part 1 as a component. In this case, the merged information mapping rules can adopt the following schemes: 1. The specific mapping order of time offset compensation information in Uplink Control Information (UCI) can be placed before the first part of the Channel State Information. For example, the time offset compensation information is Information 1, and the first part of the Channel State Information is Information 2. 2. The mapping order of time offset compensation information in UCI can also be placed after the first part of the Channel State Information. For example, the first part of the Channel State Information is Information 1, and the time offset compensation information is Information 2. The mapping rules for the above two can be referred to Figure 3D or Figure 3E.

[0135] In some embodiments of this application, the first part of the CSI information (Part 1) may include at least one of the following: Rank Indicator, Wideband Channel Quality Indicator (CQI), Subband Channel Quality Indicator (Subband CQI), Bitmap indication of the selected CSI Reference Signal (CSI-RS) resource, and selected L... n Value combination or α nThe information includes the combination of values ​​and an indication of the total number of non-zero coefficients across all layers. In some embodiments of this application, the aforementioned time offset compensation information may also be at least one of the following: the reference resource index indication information nref in the time offset compensation information, the time offset compensation value {Dn,offset,n=0,1,…,NTRP-1,n≠nref} corresponding to the CSI-RS resource set ID from low to high, or the indication information {dn,n=0,1,…,NTRP-1,n≠nref} indicating whether the time offset compensation value corresponding to the CSI-RS resource set ID from low to high exceeds a certain range.

[0136] In some embodiments of this application, during joint reporting, CSI Part 1 and time offset compensation information can be mapped in a non-continuous manner. In this case, Information 1 and Information 2 can be a part of the original CSI Part 1 and a part of the time offset compensation information, respectively. Then, part or all of the remaining information in CSI Part 1 and part or all of the remaining information in the time offset compensation information can still follow the mapping rules of Information 1 and Information 2, with Information 1 placed before or after Information 2. This process is repeated until all information is mapped. That is, any one or more information elements in the original CSI Part 1 and any one or more information elements in the time offset compensation information can be mapped according to the above mapping rules of Information 1 and Information 2 until all information elements are mapped. For example, Information 1 can be the rank indicator in the original CSI Part 1, and Information 2 can be the reference resource index indicator information in the time offset compensation information. Next, the other information elements in CSI Part 1 except for the rank indicator are mapped, and finally the other information elements in the time offset compensation information except for the reference resource index are mapped, as shown in Figure 3F.

[0137] In some embodiments of this application, it should be noted that the above mapping rules do not change the mapping order of the various information in the original CSI Part 1 information or the mapping order of the various information in the time offset compensation indication information. The basic idea is to insert other indication information based on the original mapping order of the CSI Part 1 or time offset compensation information. In this scheme, the time offset compensation information and CSI Part 1 information are reported together, and the merged information retains the original reporting priority of CSI Part 1. The reporting priority of the merged information is higher than that of CSI Part 2 information, and in cases of limited reporting resources or conflicts, the merged information is either reported as a whole or discarded entirely. The information elements of the original CSI Part 1 in the above scheme include at least one of the following: rank indication, broadband CQI, subband CQI, bitmap indication of the selected CSI-RS resource, and selected L... n Value combination or α nThe information elements in the time offset compensation information include at least one of the following: reference resource index indication information nref, time offset compensation values ​​corresponding to CSI-RS resource set IDs from low to high {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref}, or indication information on whether the time offset compensation values ​​corresponding to CSI-RS resource set IDs from low to high exceed a certain range {dn, n = 0, 1, ..., NTRP-1, n ≠ nref}. It should be noted that not all information elements or parts of the information elements in the original CSI Part 1 and / or time offset compensation information are required. Some information elements or parts of the information elements can be omitted without affecting the implementation of the scheme. For example, in some joint reporting optimization schemes mentioned in some embodiments, in order to reduce the reporting overhead of User Equipment (UE), some information elements or parts of the information in the original CSI and / or time offset compensation information can be omitted. This scheme ensures that time offset compensation information and CSI Part 1 are reported or not reported under the same reporting priority (either reported or not reported), thus avoiding the problem that only part of the information is reported, which makes the other part of the information invalid to the network side, and avoiding the waste of uplink resources.

[0138] Furthermore, the above scheme is also applicable to scenarios where frequency offset compensation information is associated with and jointly triggered by CJT CSI, and reported through a single reporting instance. In this case, simply replace the time offset compensation information in the above scheme with the frequency offset compensation information, and replace the corresponding information elements in the time offset compensation information with the corresponding information elements in the frequency offset compensation information. For example, the nref of the time offset compensation information corresponds to the nref of the frequency offset compensation information, and the time offset compensation value {D} n,offset n = 0, 1, ..., N TRP -1,n≠nref} corresponds to the frequency offset compensation value {FO} n n = 0, 1, ..., N TRP-1,n≠nref}. The above scheme is also applicable to scenarios where time offset compensation information, frequency offset compensation information, and CJT CSI are associated, and are reported through a single reporting instance after joint triggering. In this case, these three types of information can be effectively integrated to ensure the efficiency of the reporting process and the integrity of information transmission. In this case, time offset compensation information and frequency offset compensation information can be regarded as a whole and treated as "time offset compensation information" in the above scheme. This method simplifies the information structure, allowing time offset and frequency offset compensation information to participate in reporting as a single type of information, thereby improving reporting efficiency and reducing resource consumption. Alternatively, each part of time offset compensation information and frequency offset compensation information can be regarded as an independent information element and processed separately according to the above scheme. This approach allows each component of time offset and frequency offset compensation information to be reported independently, making information transmission more flexible and accurate, and is suitable for scenarios that require separate management and optimization of different compensation information.

[0139] This application provides specific schemes for the joint reporting of time offset compensation information and channel state information (CSI) in a coherent joint transmission (CJT) scenario at a transmission reception point (TRP). The first embodiment details the mapping rules for time offset compensation information in Part 1 of the CSI, supporting various methods such as sequential mapping and alternating mapping between time offset compensation information and CSI Part 1, ensuring overall consistency and priority of the merged information during reporting, and avoiding resource waste. The mapping rules include placing time offset compensation information before or after CSI Part 1, or alternating between the two, to optimize the reporting order. This embodiment also mentions that time offset compensation information can be reported or discarded together with CSI Part 1 to ensure system performance and the validity of transmitted data. Furthermore, the selection and omission of specific information elements provide reporting flexibility for user equipment, reducing reporting overhead and improving system resource utilization. Through this design, the network side can maintain information consistency during reception, effectively supporting delay compensation and resource management among multiple access points, and improving the overall reliability and transmission efficiency of the system.

[0140] Second embodiment: Mapping rules of time offset compensation information in the second part of CSI information (Part 2).

[0141] The second embodiment proposes a scheme for joint reporting of time offset compensation information and CSI, which is applicable to the case without overhead reduction optimization, and is also applicable to the joint reporting case after overhead reduction optimization proposed in the fifth embodiment.

[0142] In some embodiments of this application, the channel state information includes a first part of information and a second part of information. The time offset compensation information is mapped to the second part of the channel state information, with the mapping order being that the time offset compensation information is located before or after the second part of the channel state information. In some embodiments of this application, the channel state information includes a first part of information and a second part of information. The time offset compensation information, together with a first group, a second group, or a third group in the second part of the channel state information, forms an information group. The mapping order is that the time offset compensation information is located before or after the first group, the second group, or the third group in the second part of the channel state information. In some embodiments of this application, when the time offset compensation information is mapped to the second part of the channel state information, the time offset compensation information is reported or discarded together with the first group, the second group, or the third group in the second part of the channel state information.

[0143] In some embodiments of this application, Channel State Information (CSI) includes a first part and a second part, with time offset compensation information mapped to the second part of the CSI. Specifically, the mapping order can be that the time offset compensation information precedes or follows the second part of the CSI. These mapping rules can be further illustrated with reference to Figures 3G, 3H, and 3I. In some embodiments of this application, the time offset compensation information precedes the second part of the CSI, forming a complete joint reporting structure. In this case, the time offset compensation information is transmitted before the second part of the CSI in a specified order during reporting to ensure that the network side can correctly parse and understand the reported content. In some embodiments of this application, the time offset compensation information, together with the first, second, or third group of the second part of the CSI, forms an information group. The mapping order can be that the time offset compensation information precedes or follows the first, second, or third group of the second part of the CSI. This mapping rule allows the insertion of time offset compensation information into different information groups to provide a flexible reporting structure and optimize the organization and transmission of signaling. In some embodiments of this application, when time offset compensation information is mapped to the second part of CSI information, it can be reported or discarded together with the first, second, or third group of information in the second part. This processing method ensures that, in the case of limited reporting resources or conflicts, the integrity of the information is either preserved or discarded entirely, avoiding invalid transmission problems caused by incomplete data reporting. Through the mapping methods of these embodiments, time offset compensation information can be reasonably integrated into the second part of CSI information without affecting reporting priority and information parsing, thereby improving the decoding efficiency on the network side and the robustness of the system.

[0144] When the time offset compensation information and the CJT CSI are reported in the same reporting instance, since the CJT CSI includes two parts (Part 1 and Part 2), and the time offset compensation information can be entirely placed in the second part of the channel state information as part of the second part of the channel state information, the mapping rule for the merged information can adopt at least one of the following schemes:

[0145] In Scheme 1, the specific mapping order of the time offset compensation information in the uplink control information (UCI) can be placed before or after the second part of the Channel State Information (CSI). For example, if the time offset compensation information is information 1 and the second part of the CSI is information 2, or vice versa, the mapping rule between the two can be referred to Figure 3G or Figure 3H.

[0146] Furthermore, the aforementioned information 2 can be Group 0, Group 1, or Group 2 information from the original CSI part 2. Secondly, the aforementioned information 1 can also be at least one of the following: the reference resource index indication information nref in the time offset compensation information, the time offset compensation value {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref} corresponding to the CSI-RS resource set ID from low to high, or the indication information {dn, n = 0, 1, ..., NTRP-1, n ≠ nref} indicating whether the time offset compensation value corresponding to the CSI-RS resource set ID from low to high exceeds a certain range.

[0147] Furthermore, considering that the mapping order of different information elements may not be continuous during the joint transmission of the original CSI part2 information or time offset compensation information, the aforementioned information 1 and information 2 can be a part of the original CSI part2 and a part of the time offset compensation information, respectively. Then, some or all of the remaining information in the original CSI part2, as well as some or all of the remaining information in the time offset compensation information, can still be mapped according to the mapping rules of information 1 and information 2, that is, information 1 can be placed before or after information 2. The above mapping rules are repeated until all information elements are mapped. In other words, any one or more information elements in the original CSI part2 and any one or more information elements in the time offset compensation information can be mapped according to the mapping rules between information 1 and information 2, until all information elements are mapped. For example, information 1 can be the reference resource index indication information in the time offset compensation information, and information 2 can be the Group0 part in the original CSI part2. Next, the other information in the time offset compensation information except for the reference resource index is mapped, and finally the other information in the original CSI part2 is mapped, as shown in Figure 3I.

[0148] It should be noted that the above mapping rules do not change the mapping order of the information elements in the original CSI part 2 or the mapping order of the information elements in the time offset compensation indication information; they simply insert other indication information based on the existing mapping order of the original CSI part 2 or time offset compensation information. This method ensures the integrity of the information structure while maintaining the logical order between different information elements.

[0149] The information elements in the original CSI part 2 of the above scheme include information from Group 0, Group 1, or Group 2; the information elements in the time offset compensation information include reference resource index indication information nref, time offset compensation values ​​corresponding to CSI-RS resource set IDs from low to high {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref}, or indication information indicating whether the time offset compensation values ​​corresponding to CSI-RS resource set IDs from low to high exceed a certain range {dn, n = 0, 1, ..., NTRP-1, n ≠ nref}. Furthermore, not all information elements or parts of information elements in the original CSI part 2 and / or time offset compensation information are mandatory; some information elements may be omitted, or certain information within some information elements may be omitted, but this does not affect the above scheme. For example, as mentioned in some embodiments (such as the fifth embodiment in the following examples), when jointly reporting some Coherent Joint Transmission (CJT) Channel State Information (CSI) and time offset compensation information, some optimization schemes can be adopted to reduce the reporting overhead of the terminal. Based on these optimization schemes, certain information elements or specific information content from the original CSI and / or time offset compensation information may be omitted by default. This reduces the amount of data reported by the system, thereby effectively improving transmission efficiency, especially when network resources are limited.

[0150] In the above scheme, when the information elements in the time offset compensation information satisfy the mapping relationship between information 1 and information 2 with the information elements in the original CSI part 2, the time offset compensation information can form new Group 0, Group 1, and / or Group 2 in the joint transmission of CSI part 2. After forming new groups, the reporting priority of different groups remains unchanged. For example, when mapping the time offset compensation information to Group 0, Group 1, or Group 2 in CSI part 2, if the time offset compensation information is placed in Group 0, this information can be reported together with other information in Group 0 or discarded. This method ensures that when some information in Group 1 and / or Group 2 is discarded, the time offset compensation information can still be used to compensate for the precoded information recovered based on the amount not discarded.

[0151] Alternatively, in the above scheme, when the information elements in the time offset compensation information satisfy the mapping relationship between information elements in the original Channel State Information (CSI) part 2 and information elements in the original CSI part 2, the information elements in the time offset compensation information remain independent of Group 0, Group 1, and / or Group 2 in the original CSI part 2. The reporting priority of information elements in CSI part 2 during joint transmission is related to their mapping order; the earlier the mapping order, the higher the reporting priority or the lower the discarding priority. For example, when the time offset compensation information is placed before Group 2, its reporting priority can be higher than Group 2 but lower than Group 1. This way, even if all information in Group 2 is discarded, the time offset compensation information remains effective and can be used to compensate for the precoded information recovered based on Group 1, Group 0, and CSI part 1.

[0152] Regardless of where the time offset compensation information is mapped, when reporting resources are limited or conflicts occur, consecutively mapped time offset compensation information elements are either reported as a whole or discarded entirely. This ensures the consistency of time offset compensation information during reporting, avoids incomplete information that may result from partial reporting, and thus improves the effective utilization of reported information by the network side.

[0153] When time offset compensation information is placed in the second part (Part 2) of the CSI, since the bit overhead required for the second part of the CSI needs to be determined based on the indication information in the first part (Part 1) of the CSI, an additional bit of indication information can be added to CSI Part 1 to identify whether Part 2 contains time offset compensation information. This bit is 1 when it indicates the presence of time offset compensation information and 0 when it indicates the absence of time offset compensation information; or, 0 when it indicates the presence of time offset compensation information and 1 when it indicates the absence of time offset compensation information. The mapping method of this bit information in Part 1 can refer to the mapping rules of information 1 to information 2 in some embodiments of this application; specific details will not be elaborated here.

[0154] Furthermore, the above solution also applies to scenarios where frequency offset compensation information and CJT CSI are associated and jointly triggered, and reported through a single reporting instance. In this case, simply replace "time offset compensation information" with "frequency offset compensation information" in the above solution, and replace the corresponding information elements in the time offset compensation information with the corresponding information elements in the frequency offset compensation information. For example, the nref of the time offset compensation information corresponds to the nref of the frequency offset compensation information, and the time offset compensation value {D} n,offset n = 0, 1, ..., N TRP -1,n≠nref} corresponds to the frequency offset compensation value {FO} n n = 0, 1, ..., N TRP-1,n≠nref}. The above scheme also applies to scenarios where time offset compensation information, frequency offset compensation information, and CJT CSI are associated, and their reporting is jointly triggered and processed through a single reporting instance. In this case, the time offset compensation information and frequency offset compensation information can be treated as a whole, as the "time offset compensation information" in the above scheme, or each part of the time offset compensation information and frequency offset compensation information can be treated as a separate information element, applying the above scheme. Alternatively, the time offset compensation information and frequency offset compensation information can be treated as a whole, analogous to the "time offset compensation information" in the above scheme. At the same time, each part of the time offset compensation information and frequency offset compensation information can be treated as an independent information element, processing it in accordance with the usage of the above scheme. This ensures both information integrity and flexibility to adapt to different reporting needs.

[0155] This application provides a detailed scheme for mapping time offset compensation information to Part 2 of Channel State Information (CSI) in a coherent joint transmission scenario at the Transmission Reception Point (TRP). The time offset compensation information can be mapped to different information groups (Group 0, Group 1, or Group 2) of CSI Part 2 according to rules. The mapping order can be before or after the group to flexibly adapt to different reporting requirements and network-side parsing requirements. This mapping rule ensures the integrity of the information and, when reporting resources are limited or conflicts exist, enables overall reporting or overall discarding, avoiding invalid transmission caused by incomplete information. The priority setting and mapping position of the time offset compensation information can be adjusted as needed, such as placing it in different groups before or after CSI Part 2 to optimize the order and efficiency of data reporting. Simultaneously, the mapping method allows the insertion of time offset compensation information elements without changing the original information order in CSI Part 2, thereby improving the network's utilization efficiency of this information and enhancing the system's robustness and transmission performance.

[0156] Third embodiment: The time offset compensation information is partly located in the first part of the channel state information and partly located in the mapping rules in the second part of the channel state information.

[0157] The third embodiment proposes a scheme for joint reporting of time offset compensation information and CSI, which is applicable to the case without overhead reduction optimization, and is also applicable to the joint reporting case after overhead reduction optimization proposed in the fifth embodiment.

[0158] In some embodiments of this application, the channel state information includes a first part of information and a second part of information. The first part of the time offset compensation information is located in the first part of the channel state information, and the second part of the time offset compensation information is located in the second part of the channel state information. The mapping rule is as follows: the reference resource or resource set index of the time offset compensation information is located in the first part of the channel state information, and the time offset compensation value and the indication information indicating whether the time offset compensation value is out of range are located in the second part of the channel state information.

[0159] In embodiments of this application, the Channel State Information (CSI) consists of a first part and a second part, and time offset compensation information can be divided and mapped into these two parts of CSI information. This mapping rule aims to optimize the reporting structure and improve system performance.

[0160] In one approach, the first part of the time offset compensation information (e.g., a reference resource or resource set index) is mapped to the first part of the CSI information, while the second part of the time offset compensation information (e.g., the specific time offset compensation value and indication of whether it is out of range) is mapped to the second part of the CSI information. This mapping method allows for the segmentation and positioning of the time offset compensation information and different parts of the CSI during reporting, ensuring that critical reference information is transmitted with priority.

[0161] In another approach, the reference resource or resource set index for time offset compensation and the indication of whether the information is out of range are located in the first part of the CSI, while the specific time offset compensation value is located in the second part of the CSI. This mapping rule provides a more granular reporting strategy, allowing information of different importance to be processed with different priorities.

[0162] The mapping rules in these embodiments are associated with the overall scheme and aim to improve the effectiveness of data transmission, optimize the joint reporting process of time offset compensation and CSI information, and enable the system to better manage complex information in a multi-transmission reception point (TRP) environment. Through these mapping rules, the scheme of this application effectively supports the joint reporting of time offset compensation information and CSI, while providing more efficient resource utilization and better performance.

[0163] When time-off compensation information and Channel State Information (CSI) from Coherent Joint Transmission (CJT) are jointly reported in a single reporting instance, since the CJT CSI consists of a first part (part 1) and a second part (part 2), and the information in part 1 can determine the bit overhead required for part 2, assuming the jointly reported CSI information still consists of part 1 and part 2, the time-off compensation information can be partially mapped to the jointly reported CSI part 1, and the other part mapped to the jointly reported CSI part 2. For ease of description, this jointly reported CSI is collectively referred to as the new CSI, and the combined CSI part 1 and CSI part 2 are referred to as the new part 1 and part 2, respectively. The specific scheme is as follows:

[0164] Option 1: The reference resource or resource set index in the time offset compensation information is placed in the new CSI part 1. The time offset compensation value {Dn,offset,n=0,1,…,NTRP-1,n≠nref} in the time offset compensation information, and the indication information {dn,n=0,1,…,NTRP-1,n≠nref} corresponding to the CSI-RS resource set ID from low to high, indicating whether the time offset compensation value exceeds a certain range, are placed in the new CSI part 2.

[0165] In other words, in the above scheme, the mapping rules for reference resource or resource set index information in the new CSI part 1 can be applied with reference to the rules in the first embodiment. In this case, simply replace the time offset compensation information in the first embodiment with the reference resource or resource set index information in the time offset compensation information, that is, regard information 1 as the index information of the reference resource or resource set. Similarly, the mapping rules for time offset compensation value and out-of-range indication information in CSI part 2 can also be applied with reference to the scheme in the second embodiment. At this time, simply replace the time offset compensation information in the second embodiment with the time offset compensation value and its out-of-range indication information. Therefore, the information elements in the time offset compensation information include the time offset compensation value and its out-of-range indication information. These information are mapped to different parts in the new CSI structure to achieve joint reporting and efficient resource management.

[0166] Option 2: Based on the fifth embodiment, it is known that some TRPs in the time offset compensation value {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref} in the time offset compensation information do not need to be reported if their corresponding time offset compensation values ​​exceed the indicated range. For example, if the compensation values ​​corresponding to K TRPs in the time offset compensation information exceed the indicated range, the user equipment only needs to report NTRP-K-1 time offset compensation values. Furthermore, the indication information {dn, n = 0, 1, ..., NTRP-1, n ≠ nref} regarding whether the time offset compensation value exceeds a certain range may not need to be reported in some cases. Therefore, similar to Option 1 in this embodiment, the reference resource or resource set index in the time offset compensation information is placed in the new CSI part 1, and the time offset compensation values ​​in the time offset compensation information that do not exceed the indicated range are placed in CSI part 2. In this case, the indication information {dn, n = 0, 1, ..., NTRP-1, n ≠ nref} regarding whether the time offset compensation value exceeds a certain range is not reported.

[0167] In the above scheme, the mapping rules for reference resource or resource set index information in the new CSI part 1 can refer to the scheme in the first embodiment. At this time, it is only necessary to replace the time offset compensation information in the first embodiment with the reference resource or resource set index information in the time offset compensation information; that is, information 1 is the index information of the reference resource or resource set. Secondly, the mapping rules for time offset compensation values ​​that do not exceed the range in CSI part 2 can refer to the scheme in the second embodiment. At this time, it is only necessary to replace the time offset compensation information in the second embodiment with time offset compensation values ​​that do not exceed the range. In this case, the information elements in the time offset compensation information are time offset compensation values ​​that do not exceed the range.

[0168] Option 3: The reference resource or resource set index nref and the indication information {dn, n=0,1,…,NTRP-1,n≠nref} in the time offset compensation information are placed in the new CSI part1, and the time offset compensation value {Dn,offset,n=0,1,…,NTRP-1,n≠nref} in the time offset compensation information are placed in the new CSI part2.

[0169] In the above scheme, the reference resource or resource set index information and the indication information of whether it exceeds a certain range {dn, n=0,1,…,NTRP-1,n≠nref} can be mapped in the new CSI part1 by referring to the scheme in the first embodiment. At this time, it is only necessary to replace the time offset compensation information in the first embodiment with the reference resource or resource set index information and the indication information of whether it exceeds a certain range {dn, n=0,1,…,NTRP-1,n≠nref} in the time offset compensation information. That is, information 1 is the reference resource or resource set index information and the indication information of whether it exceeds a certain range {dn, n=0,1,…,NTRP-1,n≠nref}.

[0170] Secondly, the mapping rule for the time offset compensation value information {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref} in CSI part 2 can refer to the scheme in the second embodiment. In this case, simply replace the time offset compensation information in the second embodiment with the time offset compensation value information {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref}. Then, the information element in the time offset compensation information is the time offset compensation value information {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref}.

[0171] In the above-mentioned schemes, the priority rules for merging information mentioned in the first and second embodiments also apply to the scheme in this embodiment; and some possible constraints mentioned in the first and second embodiments also apply to the scheme in this embodiment. Compared with the second embodiment, this embodiment does not need to add 1 bit in CSI part1 to indicate whether CSI part2 contains all or part of the information in the time offset compensation information, thereby helping to reduce the feedback overhead of the user equipment. In addition, by placing the time offset compensation value and its indication of whether it is out of range in part2, even if some information in the original CSI part2 is lost, the time offset compensation information can still be used to compensate for the precoding recovered after discarding some information in the original CSI part2.

[0172] Furthermore, the above solution is also applicable to scenarios where frequency offset compensation information is jointly triggered in conjunction with CJT CSI and reported through a single reporting instance. In this case, simply replace "time offset compensation information" with "frequency offset compensation information" in the solution, and replace the corresponding information element of the time offset compensation information with the corresponding information element of the frequency offset compensation information. This approach ensures that the existing solution can be directly applied to frequency offset compensation information in jointly triggered scenarios, simplifying the reporting process and improving implementation efficiency. For example, the nref of the time offset compensation information corresponds to the nref of the frequency offset compensation information, and the time offset compensation value {D} n,offset n = 0, 1, ..., N TRP -1,n≠nref} corresponds to the frequency offset compensation value {FO} n n = 0, 1, ..., N TRP -1,n≠nref}. Simultaneously, the above scheme is also applicable to scenarios where time offset compensation information, frequency offset compensation information, and CJT CSI are associated and jointly triggered, i.e., when the reporting of time offset compensation information, frequency offset compensation information, and CJT CSI is unified through a single reporting instance. This scheme can effectively integrate the reporting requirements of multiple information types, ensuring the synchronous transmission of multiple required compensation information and CSI within a single reporting instance, thereby improving reporting efficiency and the accuracy of information coordination. In this case, time offset compensation information and frequency offset compensation information can be considered as a whole, similar to the "time offset compensation information" in the above scheme. This simplifies the reporting process, integrating the two compensation information into one information block, improving the efficiency and consistency of information transmission. Similarly, the various information elements in time offset compensation information and frequency offset compensation information can be analogized to the corresponding information elements of time offset compensation information in the above scheme. In this way, each information element can be processed independently in the corresponding manner, allowing for detailed management and processing of different compensation information requirements even when jointly triggered for reporting, improving the flexibility and accuracy of reporting. For example, the nref in time offset compensation information and the nref in frequency offset compensation information can be compared together to the nref in the time offset compensation information in the above scheme.

[0173] The third embodiment of this application proposes a rule and scheme for mapping time offset compensation information partially to the first part (Part 1) of Channel State Information (CSI) and partially to the second part (Part 2) of CSI. This embodiment improves the flexibility and system performance of joint reporting of time offset compensation information and CSI by optimizing the mapping strategy. Specifically, the scheme includes mapping the reference resource or resource set index of the time offset compensation information to CSI Part 1, and mapping the time offset compensation value and its out-of-range indication information to CSI Part 2. In different schemes, some information may not be reported to reduce the reporting overhead of user equipment. Meanwhile, the mapping order and priority rules continue to apply in this embodiment to ensure consistency when information is reported or discarded. This design reduces the bit overhead of CSI feedback and retains the validity of the time offset compensation information in the event of loss of CSI Part 2 information, thereby improving the decoding efficiency on the network side and the robustness of the overall system.

[0174] Fourth embodiment: Possible reporting priority when time offset compensation information is independent of the first part of the channel state information and the second part of the channel state information.

[0175] The fourth embodiment proposes a scheme for joint reporting of time offset compensation information and CSI, which is applicable to the case without overhead reduction optimization, and is also applicable to the joint reporting case after overhead reduction optimization proposed in the fifth embodiment.

[0176] In some embodiments of this application, the channel state information includes a first part of information and a second part of information, and the time offset compensation information is reported independently of the first part of information and the second part of information of the channel state information. In some embodiments of this application, the joint reporting of the time offset compensation information and the channel state information follows a priority rule. In some embodiments of this application, the priority rule is that the reporting priority of the time offset compensation information is higher than the reporting priority of the first part of information of the channel state information, and the reporting priority of the first part of information of the channel state information is higher than the reporting priority of the second part of information of the channel state information. In some embodiments of this application, the priority rule is that the reporting priority of the first part of information of the channel state information is higher than the reporting priority of the time offset compensation information, and the reporting priority of the time offset compensation information is higher than the reporting priority of the second part of information of the channel state information. In some embodiments of this application, the priority rule is that the reporting priority of the first part of information of the channel state information is higher than the reporting priority of the second part of information of the channel state information, and the reporting priority of the second part of information of the channel state information is higher than the reporting priority of the time offset compensation information. When time offset compensation information and CSI are jointly reported, specific priority rules are followed, which are described in detail below in conjunction with the three methods of Scheme 1:

[0177] When time offset compensation information and Coherent Joint Transmission (CJT) Channel State Information (CSI) are jointly reported in a single reporting instance, the CJT CSI comprises a first part (part 1) and a second part (part 2), and the bit overhead of part 2 can be determined based on the information in part 1. Time offset compensation information can be independent of CJT CSI parts 1 and 2, and specific schemes can employ at least one of the following methods:

[0178] Option 1: Time offset compensation information is independent of CSI part1 and CSI part2, and its reporting priority can be set as follows:

[0179] Method 1: The reporting priority is time-biased compensation information > CSI part 1 > CSI part 2. This method ensures that when reporting resource conflicts or resource constraints occur, even if part of CSI part 2 information is lost, the network side can still use time-biased compensation information to compensate for the precoding recovered based on the remaining part of CSI part 2 information; or, if both part 1 and part 2 of the entire CSI information are lost, the time-biased compensation information can still be used for time-biased compensation of the precoding indication (PMI) recovered from subsequent CSI. In this embodiment, the reporting priority of time-biased compensation information is higher than the reporting priority of the first part of CSI information, and the reporting priority of the first part of CSI information is higher than the reporting priority of the second part of CSI information. This priority rule ensures that even if the second part of CSI information is not fully reported in the event of reporting resource conflicts or resource constraints, the network side can still use time-biased compensation information to compensate for the already reported part of CSI information. This method helps maintain good network performance even when some CSI information is lost.

[0180] Method 2: The reporting priority is CSI part 1 > time offset compensation information > CSI part 2. This method ensures that even if some CSI part 2 information is lost due to reporting resource conflicts or resource constraints, the network side can still use the time offset compensation information to compensate for the precoding recovered based on the remaining CSI part 2 information. In this embodiment, the reporting priority of the first part of the CSI information is higher than that of the time offset compensation information, and the reporting priority of the time offset compensation information is higher than that of the second part of the CSI information. This setting ensures that when reporting resources are limited, the network side can at least receive the first part of the CSI information and the time offset compensation information in order to compensate for and precode the remaining CSI part.

[0181] Method 3: The reporting priority is CSI part 1 > CSI part 2 > time offset compensation information. This method ensures that the network side has at least precoding information available when reporting resource conflicts or resource constraints, even if the precoding has not undergone time offset calibration, which may result in some performance loss. In this embodiment, the reporting priority of the first part of the CSI information is the highest, followed by the second part of the CSI information, and finally the time offset compensation information. This priority rule ensures that in the case of resource conflicts or constraints, the network side can obtain the main information of the CSI to generate precoding. Even if the time offset compensation information is not reported, although it may cause some performance loss, the precoding information is still available.

[0182] In the above methods, time offset compensation information is either reported as a whole or discarded entirely. The combination of these embodiments and schemes provides flexible reporting priority configuration to optimize network performance under different resource constraints.

[0183] Furthermore, not all information elements or contents within the aforementioned CSI and / or time offset compensation information are mandatory. Some information elements can be omitted, or parts of certain information elements can be omitted without affecting the overall implementation of the scheme. For example, in some embodiments (such as the fifth embodiment mentioned later), optimization schemes were proposed to reduce the reporting overhead of the terminal when jointly reporting Coherent Joint Transmission (CJT) CSI and time offset compensation information. Based on these optimization schemes, some information elements or contents in the original CSI and / or time offset compensation information may be omitted. In this way, the reporting burden can be effectively reduced while ensuring that the necessary key information can still support the performance requirements of coherent transmission.

[0184] Additionally, when the partial compensation information was associated with CJT CSI and reported in a single reporting instance using a joint triggering method, the CSI discarding rules for the joint reporting were as follows:

[0185] When time offset compensation information and CJT CSI are configured and jointly triggered, and the time offset information and CJT CSI are in the same reporting instance (e.g., the ReportQuantity reporting quantity is 'cjtc-d-csi'), after CSI report (re)configuration, serving cell activation, BWP change, or SP-CSI activation, the UE will only receive at least one CSI-RS transmission opportunity for channel measurement in each CSI-RS resource set, and at least one CSI-RS and / or CSI-IM resource transmission opportunity for interference measurement in the corresponding resource set (no later than the CSI reference resource and within the same DRX active time, when DRX is configured), and the corresponding resource set or K under the resource configuration for time offset or channel measurement. TRS The joint CSI report will only be submitted after at least one CSI-RS / TRS resource transmission event for each CSI-RS / TRS resource in the CSI-RS / TRS resource set (no later than the CSI reference resource and within the same DRX active time, when DRX is configured); otherwise, the report will be discarded.

[0186] Furthermore, the above solution is also applicable to scenarios where frequency offset compensation information and CJT CSI are associated, in which frequency offset compensation information and CJT CSI are jointly triggered and reported through a single reporting instance. In this case, simply replacing "time offset compensation information" with "frequency offset compensation information" in the above solution will suffice. This substitution ensures the versatility of the solution and effectively handles the application of different compensation information in joint triggering and reporting. Simultaneously, the above solution is also applicable to scenarios where time offset compensation information, frequency offset compensation information, and CJT CSI are associated, where these three elements are jointly triggered and reported through a single reporting instance. In this case, all associated information can be included in a single reporting instance, ensuring integrity and coordination, and achieving efficient synchronous reporting of multi-dimensional compensation information with CJT CSI. In this case, time offset compensation information and frequency offset compensation information can be considered as a whole, analogous to "time offset compensation information" in the above solution. This approach simplifies the reporting process, integrating the two into a unified compensation information structure, which is then synchronously triggered and reported with CJT CSI.

[0187] The fourth embodiment of this application provides a reporting priority rule for time offset compensation information independent of the first and second parts of Channel State Information (CSI). This embodiment ensures, through different priority setting schemes, that the network side can obtain the most useful information according to a specific scenario when reporting resources are limited or conflicts exist. Specifically, it includes three methods: the first method sets the reporting priority of time offset compensation information higher than CSI Part 1 and Part 2, ensuring that the network can still use time offset compensation information for compensation when some CSI information is lost; the second method sets CSI Part 1 to take precedence over time offset compensation information, and time offset compensation information to take precedence over CSI Part 2, ensuring that the network obtains at least the first part of CSI and time offset compensation information when resources are limited; the third method sets CSI Part 1 and Part 2 to take precedence over time offset compensation information, ensuring that even if time offset compensation information is lost, the network side still has precoded information available. The above schemes emphasize that the joint reporting of time offset compensation information and CSI information should be reported as a whole or discarded, thereby avoiding network performance degradation caused by incomplete data. Through these priority schemes, network performance is optimized under different resource conditions, ensuring the effectiveness and robustness of information transmission.

[0188] Fifth embodiment: Scheme for reporting user equipment reporting overhead by jointly reporting time offset compensation information and CJT CSI.

[0189] The fifth embodiment proposes a joint reporting scheme for time offset compensation information and CSI to reduce overhead. For this overhead reduction optimization scenario, the schemes in the first to fourth embodiments can also be used.

[0190] In a Transmission Reception Point (TRP) Coherent Joint Transmission (CJT) scenario, when time offset compensation information and CJT Channel State Information (CSI) are jointly triggered and reported in the same reporting instance, the delay offset value to be compensated will directly adopt the delay offset value in that reporting instance. In this case, the time offset compensation information and CJT CSI are reported collaboratively, ensuring the synchronization and consistency of delay offset information during transmission. On the other hand, when the reporting of time offset compensation information is associated with the CJT CSI reporting, but is triggered separately, the delay offset value to be compensated will be the most recently reported delay offset (DO) value. In this case, ensuring the timeliness of the time offset compensation information is crucial, as this information will be used to compensate for the channel state reported by the CSI in the joint transmission. It is important to note that the last symbol of this delay offset reporting instance should be located before the first symbol triggered by the downlink control information (DCI) reported by the CJT CSI, thus ensuring that the compensation information can be correctly applied in the transmission process.

[0191] In other words, when time offset compensation information and CJT CSI reporting are jointly triggered in the CJT scenario, the delay offset to be compensated uses the delay offset in the same reporting instance; however, when time offset compensation information reporting is associated with CJT CSI reporting but is triggered separately, the delay offset value to be compensated is the most recently reported delay offset (DO), and the last symbol of its reporting instance is before the first symbol of the DCI trigger of the CJT CSI report.

[0192] When the partial compensation information and CJT's CSI are reported in the same reporting instance, and the measurement resource or resource set parameter corresponding to the selected TRP participating in coherent transmission is effective (i.e., when the parameter restrictedCMR-Selection is not configured or restrictedCMR-Selection is set to disabled), at least one of the following solutions can be adopted to reduce user equipment feedback overhead:

[0193] Option 1:

[0194] In some embodiments of this application, access points associated with resources or resource sets corresponding to predefined reference resource or resource set indexes participate in the coherent joint transmission, and the channel state information indicates whether access points associated with non-reference resources or resource sets participate in the coherent joint transmission.

[0195] In some embodiments of this application, the access points associated with the resources or resource sets corresponding to the predefined reference resource or resource set index must participate in coherent joint transmission. This means that when calculating the partial compensation information, the user equipment (UE) will preferentially select the associated access points to ensure that these access points participate in coherent joint transmission.

[0196] The standard predefines that when calculating biased compensation information, the reference resource or resource set selected by the user equipment (UE) must participate in coherent joint transmission. That is, the TRP associated with the resource or resource set corresponding to the reference resource or resource set index nref must participate in coherent joint transmission. Based on this, when the UE reports CSI, the CSI information includes indication information on whether the TRP corresponding to the measured resource or resource set participates in coherent joint transmission. Specifically, it uses a bitmap to indicate which TRPs on the network side participate in coherent joint transmission. Since it is predetermined that the TRP corresponding to the reference resource or resource set must participate in coherent joint transmission, the CSI information only indicates whether the TRPs corresponding to non-reference resources or resource sets participate in coherent joint transmission, thereby reducing the UE's indication overhead. For example, if there are N... TRP If a user equipment selects N TRPs corresponding to a resource or set of resources to participate in coherent joint transmission, then the user equipment will transmit through N... TRP Each bit (in bitmap format) indicates which N TRPs on the network side participate in coherent joint transmission. If the time offset compensation information already indicates the reference resource or resource set index, then the CSI information only needs to use N bits. TRP -1 bit can be used to indicate that the other N-1 TRPs participate in coherent joint transmission.

[0197] Based on the description of Scheme 1 above, the Channel State Information (CSI) indicates whether access points associated with non-reference resources or resource sets participate in coherent joint transmission. Specifically, the UE uses a bitmap to communicate to the network which access points associated with non-reference resources or resource sets participate in coherent joint transmission. Since the access points associated with predefined reference resources or resource sets are already explicitly involved in coherent joint transmission, the CSI information does not need to provide additional indications for these access points, thus reducing the UE's indication overhead.

[0198] For example, when there are N TRP When a UE is associated with a resource or set of resources and a Transmission Reception Point (TRP), it can select N TRPs to participate in coherent joint transmission. The UE uses N TRPs in a bitmap manner. TRPN bits are used to identify the TRP participating in the joint transmission. If the time offset compensation information already includes indication information of the reference resource or resource set index, only N bits are needed in the CSI information. TRP -1 bit is used to identify whether an access point associated with a non-reference resource or resource set participates in coherent joint transmission. This method significantly reduces UE reporting overhead while ensuring the integrity of necessary information.

[0199] Option 2:

[0200] In some embodiments of this application, if the time offset compensation information of one or more resources or resource sets relative to a reference resource exceeds an indicated or predefined range, the access point associated with the resource or resource set will not participate in the coherent joint transmission. The channel state information indicates whether the access point associated with the resource or resource set whose time offset compensation value of the time offset compensation information does not exceed the range participates in the coherent cooperative transmission.

[0201] When calculating time offset compensation information, if the time offset compensation information of one or more resources or resource sets relative to the reference resource exceeds the indicated or predefined range, then the TRP corresponding to that resource or resource set is predefined not to participate in coherent cooperative transmission. This is because the time offset compensation information already includes an indication of whether the time offset compensation of the resource or resource set corresponding to the TRP relative to the reference resource or resource set exceeds the indicated or predefined range. Therefore, the CSI information only needs to indicate whether the TRPs corresponding to those resources or resource sets whose time offset compensation values ​​do not exceed the range participate in coherent cooperative transmission, thereby reducing the reporting overhead of user equipment. For example, there are N... TRP The time offset compensation of K resources or resource sets relative to the reference resource or resource set exceeds the indicated or predefined range, and K≤N. TRP If -1, then when the user equipment reports the indication information for participating in the cooperative TRP, it only needs to indicate the remaining N. TRP - Whether the TRPs corresponding to K resources or resource sets participate in coherent cooperative transmission, thereby reducing the feedback overhead of user equipment.

[0202] Obviously, in the above scheme, the indication information {dn, n=0,1,…,NTRP-1,n≠nref} that indicates whether a certain range has been exceeded needs to be placed before the selection indication information of whether the Transmission Receiver Point (TRP) corresponding to the resource or resource set participates in cooperation, that is, before the CSI-RS resource selection bitmap information.

[0203] Furthermore, the above scheme is also applicable to scenarios where time offset compensation information is associated with Coherent Joint Transmission (CJT) Channel State Information (CSI), but with an independently triggered reporting method. In this case, if the time offset compensation information of one or more resources or resource sets associated with the CSI exceeds the indicated or predefined range relative to the reference resource, then when reporting the associated CSI, it is only necessary to indicate whether the TRPs corresponding to those resources or resource sets whose time offset compensation values ​​do not exceed the range participate in coherent cooperative transmission.

[0204] In some embodiments of this application, a mechanism for filtering time offset compensation information is employed to optimize the feedback overhead of the User Equipment (UE). If the time offset compensation information of one or more resources or resource sets exceeds a predefined range relative to a reference resource, the corresponding Transmission Reception Point (TRP) will not participate in coherent cooperative transmission. Since the time offset compensation information already contains indications of whether these TRPs exceed the range, the Channel State Information (CSI) only needs to indicate whether the TRPs of resources or resource sets whose time offset compensation values ​​do not exceed the range participate in coherent cooperative transmission. Through this scheme, the UE can reduce unnecessary indication information during reporting, thereby reducing the overall feedback overhead. For example, if there are N... TRP There are K time offset compensation ranges (TRPs) corresponding to a resource or resource set (and K≤N). TRP -1), when reporting, the user equipment only needs to indicate the remaining N. TRP - Whether the TRPs of K resources or resource sets participate in cooperative transmission. This method effectively reduces the resource consumption of UE reporting, while ensuring the network side's decision-making ability and efficiency in coherent joint transmission.

[0205] Option 3:

[0206] In some embodiments of this application, when all access points corresponding to resources or resource sets participate in the coherent cooperative transmission, the user equipment only reports the reference resource or resource set index information and the time offset compensation value when reporting the time offset compensation information.

[0207] In some embodiments of this application, the standard predefines that when calculating time offset compensation information, if the time offset compensation information of one or more resources or resource sets exceeds an indicated or predefined range relative to the reference resource, the corresponding Transmission Reception Point (TRP) will not participate in coherent cooperative transmission. Therefore, the CSI reporting information will include indication information regarding whether the TRP corresponding to the reference resource or resource set participates in coherent cooperative transmission. Based on this, when all TRPs corresponding to resources or resource sets participate in coherent cooperative transmission, the user equipment only reports the reference resource or resource set index nref information and the time offset compensation value {Dn, offset, n = 0, 1, ..., NTRP-1, n ≠ nref}, meaning the user equipment may not report {dn, n = 0, 1, ..., NTRP-1, n ≠ nref} information. In this way, by reducing the amount of reported information, the feedback overhead of the user equipment can be effectively reduced, while ensuring that the network side can accurately understand the transmission configuration.

[0208] In some embodiments of this application, to optimize the reporting efficiency of User Equipment (UE), when all access points corresponding to resources or resource sets participate in coherent cooperative transmission, the UE only needs to report the reference resource or resource set index information and the time offset compensation value when reporting time offset compensation information. The standard predefines that when the time offset compensation information of one or more resources or resource sets exceeds the indicated or predefined range, the relevant Transmission Reception Point (TRP) will not participate in coherent joint transmission. This ensures that the CSI reporting information includes indication information of the TRP associated with the reference resource or resource set participating in coherent cooperative transmission. Therefore, when all TRPs participate in coherent transmission, the UE only needs to report the reference resource index and the relevant time offset compensation value, without needing to report out-of-range indication information, thereby reducing the amount of data reported. This method effectively reduces the feedback overhead of the UE and ensures that the network side can accurately obtain the necessary transmission information.

[0209] Option 4:

[0210] In some embodiments of this application, the channel state information includes selection indication information on whether the access point corresponding to the resource or resource set participates in the cooperation. The user equipment reports the time offset compensation value of the access point corresponding to the resource or resource set that participates in the coherent cooperative transmission, excluding the access point corresponding to the reference resource or resource set index. Alternatively, it reports the time offset compensation value of all access points except the access point corresponding to the reference resource or resource set index, as well as the reference resource or resource set index information.

[0211] In some embodiments of this application, since the CSI information already includes selection indication information on whether the Transmission Reception Point (TRP) corresponding to the resource or resource set participates in cooperation, the User Equipment (UE) only needs to report the time offset compensation values ​​of the resources or resource sets participating in coherent cooperative transmission, excluding the TRP corresponding to the reference resource or resource set index, or report the time offset compensation values ​​of all TRPs except the TRP corresponding to the reference resource or resource set index and the reference resource or resource set index nref information when reporting time offset compensation information. For example, when the bitmap information of the TRP selection indication in the CSI information is {1011}, it indicates that the first, third, and fourth TRPs participate in cooperation. Assuming that the time offset compensation information includes the indication information of the reference resource or resource set, and assuming that the first TRP is the reference resource or resource set, then the UE only needs to report the time offset compensation information of the resources or resource sets corresponding to the third and fourth TRPs relative to the reference resource or resource set when reporting time offset compensation information. If the second TRP is a reference resource or resource set, the user equipment needs to report the time offset compensation information obtained from the measurements of the resources or resource sets corresponding to the first, third, and fourth TRPs. This scheme reduces the amount of data reported, improves reporting efficiency, and ensures that the network side can accurately receive and interpret the necessary transmission information. Furthermore, in this scheme, the time offset compensation information can be reported only as the index nref information and the time offset compensation value of the reference resource or resource set. In this case, the time offset compensation value can be the time offset compensation value of the TRP corresponding to other resources or resource sets participating in coherent cooperative transmission, excluding the Transmission Receiver Point (TRP) corresponding to the reference resource or resource set index. In this scheme, the reference resource or resource set can be selected from the resources or resource sets corresponding to the participating cooperative TRPs. Moreover, in a single reporting instance, the mapping of the time offset compensation value should at least follow the measurement resource or resource set selection indication information corresponding to the TRP.

[0212] Furthermore, the aforementioned schemes are not entirely independent; they can be combined. For example, Scheme 1 predefines that the TRP corresponding to the reference resource or resource set index will definitely participate in coherent joint transmission, while Scheme 2 predefines that the TRP corresponding to resources or resource sets exceeding the time offset compensation range will definitely not participate in coherent joint transmission. Therefore, when the user equipment reports CSI, the TRP selection indication information only needs to indicate TRPs other than those corresponding to the reference resource or resource set and those corresponding to resources or resource sets exceeding the time offset compensation range. For example, there are N... TRP The time offset compensation of K resources or resource sets relative to the reference resource or resource set exceeds the indicated or predefined range, and K≤N. TRP-1, then the user equipment only needs to go through N TRP -K-1 bits are sufficient to indicate which TRPs are involved in the coherent joint transmission.

[0213] Additionally, regarding time offset compensation information reporting, when there are only two TRPs, if the time offset compensation of one TRP relative to the other TRP exceeds a certain range, the user equipment may not report it. The user equipment will only report the time offset compensation value {D} when the time offset compensation value of one of the TRPs does not exceed the configured range. n,offset n = 0, 1, ..., N TRP -1,n≠nref}, that is, {dn,n=0,1,…,N TRP -1, n≠nref} can be left unreported.

[0214] When the time offset compensation information is associated with the channel state information (CSI) of coherent joint transmission (CJT) and is jointly reported by a single trigger instance or separately through independent trigger instances, if there are only two Transmitter Receiving Points (TRPs) and the time offset compensation value of the TRP corresponding to one of the measurement resources or resource sets relative to the reference resource exceeds a certain range, then only the time offset compensation information needs to be reported, without having to report the associated CSI information.

[0215] Considering the limited range of time offset compensation values, if the value exceeds a certain range, the specific value cannot be determined, making it difficult to effectively compensate for the time offset of the TRP corresponding to the relevant measurement resources. However, to ensure the performance of coherent transmission, synchronous calibration among multiple TRPs is crucial. Therefore, it can be agreed that when CJT CSI and time offset compensation information are jointly triggered for reporting, the selection indicator switch for coherent cooperative transmission measurement resources must be turned on, i.e., the parameter restrictedCMR-Selection should not be configured or should be set to disabled, indicating that some or all TRPs can be selected from multiple TRPs to participate in coherent joint transmission. This setting enables a flexible transmission scheme to improve the performance and efficiency of multi-access point transmission while meeting the time offset compensation requirements.

[0216] Furthermore, the above solution also applies to scenarios where time offset compensation information and CJT CSI are associated, but triggered independently, meaning that the reporting of time offset compensation information and CJT CSI is triggered and reported independently. Simultaneously, this solution also applies to scenarios where time offset compensation information, frequency offset compensation information, and CJT CSI are associated, for example, where the reporting of time offset compensation information and frequency offset compensation information is jointly triggered, while the reporting of CJT CSI is independently triggered; or where the reporting of time offset compensation information, frequency offset compensation information, and CJT CSI are all jointly triggered.

[0217] Furthermore, the time offset compensation value described above corresponds to a range of values. The network side is unaware of the specific time offset value to be compensated after receiving the information. Therefore, the time offset value can be further quantified, for example, if the delay offset falls within [δ...]. i ,δ i+1 Within δ, we can further define X states, where X represents the state of δ. i+1 -δ i Perform uniform quantization, where Where D X-2 This indicates an invalid state, and the value of X can be any one of {2, 4, 8, 16, 32}, which can be configured on the network side, predetermined, or indicated on the terminal side. Then, the terminal side also needs to indicate that each time offset compensation value falls within [δ]. i ,δ i+1 How exactly is the value retrieved within ()? For example, through... or Each bit can be used to indicate the quantization value corresponding to all time offset compensation values, or to indicate the specific quantization value of each time offset compensation value individually. Alternatively, to simplify standard design, all time offset compensation values ​​can be predefined to take the minimum value within a range, or the average value within a range, for example, the time offset compensation value is in the range [δ]. i ,δ i+1 Within this range, δ is uniformly taken. i , or (δ i+1 -δ i The value obtained by dividing 1 / 2 by any one of the numbers in {2,3,4,5,6,7,8}.

[0218] In some embodiments of this application, the channel state information includes selection indication information regarding whether the Transmission Reception Point (TRP) corresponding to a resource or resource set participates in coherent cooperation. Based on this, when reporting time offset compensation information, the User Equipment (UE) only needs to report the time offset compensation values ​​of TRPs participating in coherent cooperative transmission, excluding the TRP corresponding to the reference resource or resource set index, or the time offset compensation values ​​and index information corresponding to all TRPs that are not reference resources or resource sets, thereby reducing the reporting burden. For example, when the TRP selection bitmap of the CSI information is {1011}, it indicates that the first, third, and fourth TRPs participate in cooperation. If the first TRP is a reference resource or resource set, the UE only needs to report the time offset compensation information of the third and fourth TRPs. This scheme effectively reduces the amount of reported data and optimizes feedback efficiency. Furthermore, different schemes can be combined; for example, it can be predefined that TRPs of reference resources must participate in cooperation, while TRPs with time offsets outside the range do not participate in cooperation. In this combined scheme, the user equipment only needs to indicate whether TRPs other than the reference and out-of-range TRPs participate in cooperation, further reducing the number of reported bits. When only two TRPs are involved, if the time offset compensation of one relative to the other is out of range, the user equipment can choose not to report this information, and only report the necessary time offset compensation value when the time offset is within range. This further reduces the UE's feedback overhead while ensuring accurate interpretation of cooperative transmissions by the network side.

[0219] The fifth embodiment of this application provides a scheme to reduce the reporting overhead of user equipment when jointly reporting time offset compensation information and Coherent Joint Transmission (CJT) Channel State Information (CSI). To this end, four main strategies are proposed. Scheme 1 predefines that the Transmitter Receiver Point (TRP) associated with the reference resource index must participate in cooperation; the user equipment only needs to report the participation indication of non-reference TRPs, reducing the number of bits reported. Scheme 2 stipulates that when the time offset compensation of a resource exceeds the range, the TRP of that resource does not participate in cooperation; the user equipment only needs to report TRPs within the range, further reducing overhead. Scheme 3, when all TRPs participate in cooperation, only the reference resource index and time offset compensation value need to be reported, without reporting other information. Scheme 4 allows the user equipment to only report the time offset compensation value of non-reference TRPs, reducing the reporting volume. Furthermore, different schemes can be used in combination; for example, combining Scheme 1 and Scheme 2 can further simplify reporting. Through these strategies, the user equipment can effectively reduce the amount of feedback information, optimize reporting efficiency, and ensure that the network side obtains the necessary information to support efficient cooperative transmission.

[0220] In summary, the solutions in the first to fourth embodiments are widely applicable to the joint reporting of time offset compensation information and CSI, covering both unoptimized ordinary scenarios and the overhead-reduction optimized scenarios in the fifth embodiment. Second solution: Mobility management based on L1 measurement when the UE simultaneously connects to multiple access points.

[0221] The second solution in this application addresses the following technical problem.

[0222] Technical issue: Mobility management based on L1 measurement when user equipment connects to multiple access points.

[0223] Some embodiments of this application primarily relate to mobility management of User Equipment (UE) in scenarios connecting to multiple access points, particularly in distributed Multiple-Input Multiple-Output (MIMO) systems. During movement, the UE needs to update access points, such as adding or deleting existing ones. Existing L3 measurement-based standards can lead to significant latency and higher measurement resource overhead, and the deletion or addition of access points has a significant impact on system performance. For example, if the process of deleting some access points and simultaneously introducing new ones is lengthy, it may result in degraded system performance. In contrast, L1 / L2-triggered mobility, compared to L3 measurement-triggered mobility, can shorten the latency of access point updates.

[0224] Current NR systems support L1 / L2-triggered mobility management in single-cell scenarios, where the UE only needs to perform handover from the serving cell to a single candidate cell based on L1 measurements. However, in multi-access point (MAP) scenarios, the UE must simultaneously consider L1 measurements from multiple serving and candidate MAPs so that the network can determine whether to add or remove MAPs based on the L1 measurements reported by the UE. This application aims to address the following issues:

[0225] Service access point measurement reporting issue: Currently, in NR systems, when using L1 Reference Signal Received Power (RSRP) or L1 Signal-to-Interference-plus-Noise Ratio (SINR) as measurements, the UE incurs significant reporting overhead, especially when connected to multiple service access points simultaneously. To reduce this overhead, the UE only needs to report measurements from a subset of service access points to assist the network in making decisions regarding disconnection and reconnection.

[0226] Beam index reporting overhead: In existing systems, the maximum number of candidate cells is 8. However, in scenarios connecting multiple access points, the number of serving access points and candidate access points may exceed 8, such as 16 or more. Since each access point may be configured with multiple resources, the UE needs to identify the access points and their resources to be reported in advance to reduce indication overhead. Some embodiments of this application propose how to effectively reduce the UE's overhead in beam index indication.

[0227] Time Offset Measurement and Compensation: In Coherent Joint Transmission (CJT) with multiple access points, a new access point must meet specific channel quality requirements and time offset conditions to participate in the transmission. The standard recommends that the UE store time offset compensation information to cope with slow time offset changes, thereby ensuring that the new access point can participate in the transmission. Some embodiments of this application consider how to design the reporting content to improve transmission efficiency when measuring channel quality and time offset.

[0228] Access Point Update Instruction: Unlike single-cell mobility, in multi-access point scenarios, a UE may need to establish connections with multiple candidate access points simultaneously and disconnect some serving access points. Existing standards only support handover from a single serving cell to a target cell. Some embodiments of this application investigate how to instruct the UE to update access points from the network side, including how to add candidate access points and disconnect serving access points.

[0229] Based on the aforementioned technical problems, some embodiments of this application propose a second solution that combines time offset compensation information with L1 measurement information for mobility management of multi-access point UEs. Then, a serving access point selection and reporting mechanism, a scheme to reduce UE reporting overhead through two-level beam indication, a method for determining the joint reporting content, and an access point update indication based on potential update status are provided.

[0230] In some embodiments, FIG4A is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The wireless communication method is executed on a user equipment and includes at least one of the following steps: Operation 401A: receiving configuration information and measurement signals of multiple access points sent by a network-side device, and performing measurements based on the measurement signals to generate measurement results; Operation 402A: reporting the measurement results to the network-side device, including: reporting the measurement results of some or all access points to the network-side device in the same reporting instance; and Operation 403A: receiving access point update indication information sent by the network-side device, wherein the user equipment disconnects from some or all serving access points according to the access point update indication information, and establishes connections with some or all candidate access points according to the access point update indication information.

[0231] In some embodiments, FIG4B is a schematic flowchart of a wireless communication method provided in an embodiment of this application. The wireless communication method is executed on a network-side device and includes at least one of the following steps: Operation 401B: sending configuration information and measurement signals of multiple access points to a user equipment; Operation 402B: receiving measurement results reported by the user equipment, including: receiving measurement results of some or all access points reported by the user equipment in the same reporting instance; and Operation 403B: sending access point update indication information to the user equipment to instruct the user equipment to disconnect from some or all serving access points and establish connections with some or all candidate access points.

[0232] In some embodiments of this application, a reporting instance refers to a data transmission process in which a user equipment sends measurement results or status information to a network-side device. In the scenario of coherent joint transmission of the multiple access points, the user equipment needs to report important information related to its communication performance, such as channel state information (CSI) and time offset compensation information.

[0233] In a reporting instance, user equipment (UE) can organize and package different categories of information according to predetermined mapping rules, and then send them uniformly to network-side devices. This process aims to enable network-side devices to process measurement data from UEs more efficiently, and to perform network optimization and resource scheduling. Specifically, a reporting instance can include the following: Joint reporting of CSI and time offset compensation information: In a reporting instance, UEs simultaneously send CJT CSI and time offset compensation information, which helps the network side optimize precoding and transmission strategies in multi-TRP joint transmission scenarios. Information mapping and prioritization: In a reporting instance, CSI and time offset compensation information can be divided into different parts (such as Part 1 and Part 2), and each part places corresponding information elements according to mapping rules. The setting of mapping rules and information priorities helps determine which information can be prioritized and which can be discarded when resources are limited. Reducing reporting overhead: The reporting instance is designed to optimize data volume and reduce the overhead of UEs in the feedback process. For example, by simplifying the format and priority control of time offset compensation information, the transmission burden can be reduced while maintaining the integrity of necessary information. Reporting instances is the core mechanism for ensuring information transmission between user equipment and network-side equipment. With proper design, the robustness and performance of the system can be enhanced, especially in highly complex distributed MIMO and multi-access point communication scenarios.

[0234] In some embodiments of this application, reporting partial information refers to reporting only a portion of the information by default, or reporting specific information rather than all information, in order to reduce reporting overhead while ensuring effective compensation for precoding.

[0235] In some embodiments of this application, receiving the configuration information of the multiple access points sent by the network-side device includes: receiving an indication from the network-side device of which serving access points' beam measurement information needs to be reported. In some embodiments of this application, receiving the configuration information of the multiple access points sent by the network-side device includes: receiving an indication from the network-side device of the maximum number of access points that need to be reported and the maximum number of beam measurement results reported under each access point. In some embodiments of this application, the measurement results include one or more of the following: reference signal received power, signal-to-noise ratio, reference signal received quality, received signal strength indication, path loss, time delay deviation, phase deviation, or frequency deviation. In some embodiments of this application, the measurement results include one or more of the following information: beam measurement information of some or all serving access points; beam measurement information of some or all candidate access points; time offset compensation information of some or all access points; beam index information corresponding to the beam measurement information of the some or all serving access points; or beam index information corresponding to the beam measurement information of the some or all candidate access points.

[0236] In some embodiments of this application, the beam index information corresponding to the beam measurement information of some or all of the access points reported by the user equipment adopts a two-level indication method: first indicating the access point to which the beam belongs, and then indicating the beam under the access point. In some embodiments of this application, the access point update indication information includes one or more of the following: access point update status indication information; configuration identifier information corresponding to the access point or the resources or resource sets under the access point; number of serving access points or candidate access points; and transmission configuration indication status information corresponding to newly introduced access points.

[0237] In some embodiments of this application, the User Equipment (UE) receives multi-access point configuration information sent by a network-side device, including beam measurement information of serving access points that needs to be reported. Specifically, the network-side device may send an indication of which serving access points' beam measurement information needs to be reported, and the maximum number of beam measurement results that need to be reported for each access point. Measurement results may include information such as Reference Signal Received Power (RSRP), Signal-to-Noise Ratio (SNR), Reference Signal Received Quality (RSRQ), Received Signal Strength Indicator (RSSI), path loss, delay offset, phase offset, or frequency offset. In some embodiments, these measurement results involve beam measurement information of some or all serving access points, beam measurement information of candidate access points, and time offset compensation information of some or all access points. The measurement information also includes beam index information corresponding to the beam measurement information. When a UE reports beam measurement information, it employs a two-level indication method: first, it indicates the access point to which the beam belongs, and second, it indicates the beams under that access point. This two-level indication method helps reduce reporting overhead and improves the accuracy of the indication. Furthermore, access point update indication information can include one or more of the following: access point update status indication information, configuration identifier information of the access point or its resources, the number of serving access points or candidate access points, and transmission configuration indication status information of newly introduced access points. Figure 4C illustrates the interaction process of this indication information, showing the flow of the user equipment receiving and reporting different measurement results, and how the network side makes decisions on access point updates and switching based on these results. Through this process, the network-side equipment can effectively manage the multi-access point connections of user equipment, ensuring the performance of cooperative transmission and the stability of the system.

[0238] In some embodiments of this application, when a User Equipment (UE) connects to multiple access points simultaneously, it may be necessary to delete some serving access points or connect to some new candidate access points as the UE moves. Determining whether the UE needs to delete some serving access points and / or connect to new candidate access points typically relies on L1 layer measurement results. Specifically, L1 layer measurements may include Reference Signal Received Power (RSRP) information, Signal-to-Noise Ratio (SINR) information, Reference Signal Received Quality (RSRQ), Received Signal Strength Indicator (RSSI), path loss, delay deviation, phase deviation, frequency deviation, etc., or other measurements.

[0239] Some embodiments of this application provide a scheme for determining whether a UE needs to delete or add some access points in the access point set based on the aforementioned measurements. Specifically, after performing measurements, the UE reports these measurement results to the network-side device. The network side analyzes and makes a decision based on the received L1 measurement results to determine whether the UE needs to delete some access points from the existing service access point set or access new candidate access points. Figure 4C illustrates the specific flow of some embodiments of this application, including the UE performing L1 measurements, the network-side device receiving and analyzing these measurement results, the network side sending an indication message to the UE based on the analysis results, and the UE performing corresponding access point update operations based on the indication message. This process can ensure that the UE's connection management in a multi-access point environment is more efficient and stable, and helps to improve system performance and optimize the configuration of network resources.

[0240] Based on some embodiments of this application, the above process mainly includes the steps illustrated in FIG4C:

[0241] Step 1: Reporting LTM-based capabilities in multi-access point scenarios. User Equipment (UE) reports its ability to support L1 / L2 triggered mobility (LTM) in multi-access point scenarios, including the ability to perform LTM based on one or more L1 measurement information. L1 measurement information includes one or more of the following: Reference Signal Received Power (RSRP), Signal-to-Noise Ratio (SINR), Reference Signal Received Quality (RSRQ), Received Signal Strength Indicator (RSSI), path loss, delay deviation, phase deviation, and frequency deviation. See Implementation Example 6 for details.

[0242] Step 2: Predefine some necessary / key information for supporting LTM in multi-access point scenarios: Predefine some necessary / key information for supporting LTM in multi-access point scenarios, including at least one of the following:

[0243] The index indication method for the reported access point beam is predefined and adopts a two-level indication method. First, it indicates which access point it belongs to, and then it indicates which beam under the access point it belongs to.

[0244] The selection range of reference resources in the time offset compensation information is predefined. For example, when reporting time offset measurements, reference resources can only be selected from the resources or resource sets corresponding to the service access point, or only from the access point that reported the measurement results.

[0245] Predefined access point update status information; for example, access point update status information can be divided into 3 states.

[0246] Step 3: Send parameter configuration information: The network side sends parameter configuration information to the user equipment (UE). The parameter configuration information may include the necessary measurement resource configuration information of the service access point and candidate access point, and the indication information related to measurement reporting, such as how many access points the UE needs to report or can report at most, the maximum number of beam measurement information under the access point, and the maximum number of beam measurement information of the service access point to report, etc.

[0247] Step 4: Feedback message for parameter configuration completion: The user equipment sends a message to the network side to indicate that the parameter configuration has been completed.

[0248] Step 5: Indicate which service access point measurement information needs to be reported: The network side instructs the user equipment which service access point measurement information needs to be reported. This instruction can be carried through Radio Resource Control (RRC), Medium Access Control Element (MAC CE), or Downlink Control Information (DCI).

[0249] Step 6: Send measurement signals: The network side sends measurement signals to the user equipment. These measurement signals may include a Synchronization Signal Block (SSB), Channel State Information Reference Signal (CSI-RS), Tracking Reference Signal (TRS), Demodulation Reference Signal (DMRS), CSI Interference Measurement (CSI-IM), or other measurement signals. The specific names are not limited.

[0250] Step 7: The user equipment measures the measurement signals transmitted from the network side: The user equipment measures the measurement signals transmitted from the network side. The measurements may include time offset compensation information and / or L1 measurement information. The L1 measurement information includes one or more of the following: Reference Signal Received Power (RSRP) information, Signal-to-Noise Ratio (SINR) information, Reference Signal Received Quality (RSRQ) information, Received Signal Strength Indicator (RSSI) information, path loss, time delay deviation, phase deviation, and frequency deviation.

[0251] Step 8: Report Measurement Results: The User Equipment (UE) reports the measurement results based on the measurements. The main reporting content includes at least one or more of the following, as detailed in Example 8: partial or all beam measurement information of the serving access point that must be reported based on network side instructions; partial or all beam measurement information of some or all candidate access points determined based on the number information configured by the network side; indication information for selecting reference resources from all serving access points based on predefined criteria; access point information where the beam is located, and beam index information under the access point, determined based on a predefined beam indication method; beam index information of the serving access point that must be reported based on network side configuration; and time offset compensation information of the measured beams of some or all access points relative to the corresponding beams of the reference resources, obtained based on network side instructions.

[0252] Step 9: Issue Access Point Update Indication Information: The network side issues access point update indication information, which includes at least one or more of the following: access point update status indication information, configuration identifier (Config ID) information corresponding to the access point or resources or resource sets under the access point, number of service access points or candidate access points, and transmission configuration status information (TCI state ID) information corresponding to newly introduced access points.

[0253] Specifically, in some embodiments of this application, the access point update indication information includes one or more of the following: access point update status indication information; configuration identifier information corresponding to the access point or resources or resource sets under the access point; number of serving access points or candidate access points; and transmission configuration indication status information corresponding to newly introduced access points. Described in conjunction with step 9, the network side sends access point update indication information to the user equipment. This information includes at least one or more of the following: access point update status indication information, used to indicate the update status of the access point; configuration identifier information (Config ID) corresponding to the access point or resources or resource sets under the access point, used to specify a specific resource configuration; number of serving access points or candidate access points, helping the user equipment understand the number of access points involved; and transmission configuration indication status information (TCI state ID) for newly introduced access points, indicating the transmission status configuration related to the new access point. For details, please refer to the ninth embodiment to achieve efficient access point management and updates.

[0254] The embodiments of this application provide an operational flow for User Equipment (UE) in mobility management in a multi-access point scenario, offering several advantages. First, by reporting the UE's ability to support L1 / L2 triggered mobility (LTM) in step 1, the network side can comprehensively understand the UE's measurement and reporting capabilities, including measurement information such as Reference Signal Received Power (RSRP) and Signal-to-Noise Ratio (SINR). Step 2 predefines necessary / key information, such as beam indication methods and the selection range of reference resources, ensuring the standardization and consistency of the reporting. Steps 3 and 4 improve the efficiency and accuracy of configuration by having the network side send parameter configuration information and receive confirmation from the UE. Steps 5 and 6, through measurement indications and signals sent by the network side, enable the UE to perform measurements under specified conditions, ensuring the accuracy and effectiveness of the measurements. In steps 7 and 8, the UE reports based on the measurement results, including time offset compensation information and beam index information, reducing reporting redundancy and optimizing feedback overhead. Finally, in step 9, the network side issues access point update indication information, including access point update status, configuration identifier (Config ID), number of serving access points and candidate access points, and transmission configuration status information (TCI state ID) of newly introduced access points, ensuring the clarity and efficiency of access point updates. This overall process optimizes mobility management in multi-access point scenarios, helping to improve network performance, reduce reporting latency and resource overhead, and enhance system robustness and user experience.

[0255] It should be noted that the above steps are not required in every process, nor do they constitute the complete interaction process between the base station and the user equipment. They are only some key processes relevant to the implementation scheme of this application. The order of the above information exchange can also be flexibly adjusted and does not need to be strictly followed in the listed order.

[0256] To facilitate understanding of the technical solutions of the embodiments of this application, the technical solutions related to the embodiments of this application are described below. The technical solutions of the sixth, seventh, eighth, ninth, tenth, and eleventh embodiments are listed below for description, but this application is not limited thereto. In some embodiments of this application, the solution of the sixth embodiment can be implemented in conjunction with the solutions of the seventh, eighth, ninth, tenth, and / or eleventh embodiments, or it can be implemented independently of the solutions of the seventh, eighth, ninth, tenth, and / or eleventh embodiments. In some embodiments of this application, the solution of the first embodiment described above can be implemented in conjunction with the solutions of the second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, and / or eleventh embodiments, or it can be implemented independently of the solutions of the second, third, fourth, fifth, sixth, seventh, eighth, ninth, tenth, and / or eleventh embodiments. In some embodiments of this application, the solutions of multiple embodiments can be implemented in combination or independently.

[0257] Sixth embodiment: Selection mechanism for service access point information reporting during multi-access point updates.

[0258] In some embodiments of this application, when a User Equipment (UE) is simultaneously connected to multiple Access Points (APs), the movement of the UE may involve the deletion of at least one serving access point and / or the addition of at least one candidate access point. Since the UE is simultaneously connected to multiple serving access points, and the probability of completely deleting all access points is low, it is unnecessary for the UE to report the measurement results of all serving access points during measurement reporting to reduce reporting overhead. Therefore, the UE can determine the measurement quantities of the serving access points that need to be reported based on its own selection, network-side instructions, or a combination of both. The same consideration applies to candidate access points. Based on this, this application provides at least one of the following solutions:

[0259] Before describing the specific scheme, it is assumed that the measurement resource configurations of the access points can be located in the same resource set, or each measurement access point corresponds to a measurement resource set or subset of resources, each candidate access point corresponds to at least one measurement resource, and the number of resources configured in each candidate access point can be constrained to be the same. When the measurement resources are located in a resource set, the resources in the resource set are indexed sequentially. If each access point corresponds to a measurement resource set or subset of resources, the measurement resource index increases sequentially according to the index order of the resource set or subset. For example, if each resource set from measurement resource set 1 to N contains M measurement resources, then the resource index of measurement resource set 1 is 1 to M, the resource index of measurement resource set 2 is M+1 to 2M, and so on, with the resource index of measurement resource set N being (N-1)M+1 to NM.

[0260] Furthermore, the configuration of measurement resources may involve the service access point being located in one resource set and the candidate access point being located in another resource set; or the service access point being located in one measurement set, with each access point corresponding to a resource subset, and the candidate access point being located in another resource set, with each access point corresponding to a resource subset. The resource indices mentioned above can be incremented in the order of the resource set indices. For example, assuming the resource set corresponding to the candidate access point is resource set 1, with Q resources, the corresponding index is {1,2,...,Q}, while the resource set corresponding to the service access point is resource set 2, with P resources, the corresponding index is {Q+1,Q+2,...,Q+P}. The above resource indices are merely examples; in specific cases, the service access point may also correspond to resource set 1, and the candidate access point may correspond to resource set 2. This embodiment does not impose such limitations.

[0261] In summary, regardless of the configuration method used, this application uses measurement resources as the unified counting standard. That is, the number of measurement resources configured for both the serving access point and candidate access points is not specifically constrained by the resource index order, as long as the resource indices under the same access point are consecutive. Furthermore, measurement resources may include Synchronization Signal Block (SSB), Channel State Information Reference Signal (CSI-RS), Tracking Reference Signal (TRS), Demodulation Reference Signal (DMRS), CSI Interference Measurement Reference Signal (CSI-IM), or other measurement signals, with no specific signal name limitation. The measured quantities may be one or more of the following: Reference Signal Received Power (RSRP) information, Signal-to-Noise Ratio (SINR) information, Reference Signal Received Quality (RSRQ), Received Signal Strength Indication (RSSI), Path Loss, Delay Deviation, Phase Deviation, and Frequency Deviation, depending on the user equipment's reporting capabilities.

[0262] Based on the above assumptions, when a user equipment performs measurements based on network-side measurement resources, it can adopt at least one of the following schemes to specifically report the measurement quantities of which service access points:

[0263] Option 1: Configure the network side to specify the number of access points L reported by the user equipment or the maximum number of access points L. max And the number of beams K reported by each access point or the maximum number of beams K. max The specific L access points reported by the user equipment, and the K beams under each access point, are determined by the user equipment, where L≤L max , K≤K maxIn some embodiments of this application, whether the reported quantity includes measurements of the serving access point can be determined by the network-side configuration. Specific configuration methods can include Radio Resource Control (RRC), Medium Access Control Element (MAC CE), or Downlink Control Information (DCI). If the network side is configured to include measurements of the serving access point in the reported quantity, the user equipment (UE) can choose to include or exclude these measurements during reporting, depending on the UE's decision. If the network side is configured to exclude measurements of the serving access point from the reported quantity, the UE will not include related measurements of the serving access point in its reported information. Compared to existing solutions, the difference in this application is that even if the network side is configured to include candidate access points in the reported quantity, the UE decides whether to actually include the measurements of the candidate access points. This flexibility allows the UE to adjust the reported content according to actual conditions, thereby optimizing reporting efficiency and reducing unnecessary overhead. This mechanism improves the flexibility and efficiency of user equipment measurement and reporting in multi-access point scenarios, while ensuring that the network side can obtain the necessary information to adapt to the current network status.

[0264] Option 2: Configure the network side to specify the number of access points L reported by the user equipment or the maximum number of access points L. max And the number of beams K reported by each access point or the maximum number of beams K. max The user equipment reports L access points and K beams under each access point, where L≤L max , K≤K maxSimultaneously, the network side configures the number S of reported service access points or determines the number S of reported service access points through a predefined method. The specific LS candidate access points to be reported, and the K beams under each access point, are determined by the user equipment (UE), as are the specific S service access points to be reported. In some embodiments of this application, the number of service access points configured by the network side can be configured through Radio Resource Control (RRC), Medium Access Control Control Element (MAC CE), or Downlink Control Information (DCI). The innovation of Scheme 2 lies in that even if the network side configures the reported quantity to include candidate access points, whether the measurement quantity actually includes candidate access points is determined by the user equipment (UE). This differs from existing schemes, where the network side configuration determines the specific scope and object of the reported content. This scheme gives the user equipment greater flexibility, enabling it to choose whether to include candidate access point measurements based on real-time measurement conditions, its own status, or network conditions, thereby optimizing reporting efficiency, reducing unnecessary data overhead, and improving overall system performance while satisfying the network side configuration.

[0265] Option 3: Configure the network side to specify the number of access points L reported by the user equipment or the maximum number of access points L. max And the number of beams K reported by each access point or the maximum number of beams K. max The user equipment reports L access points and K beams under each access point, where L≤L max , K≤K max Meanwhile, the network side is configured to report a maximum number of service access points of S. max Alternatively, the number S of reporting service access points can be determined through a predefined method. max The specific LS candidate access points to be reported, and the K beams under each access point, are determined by the user equipment. The specific S serving access points to be reported are also determined by the user equipment, where S ≤ S. max≤L, and the value of S can be 0. In some embodiments of this application, the network side can configure the maximum number of serving access points reported by the user equipment (UE) through Radio Resource Control (RRC), Medium Access Control Control Element (MAC CE), or Downlink Control Information (DCI). This configuration method allows the network side to flexibly adjust the number of serving access points reported by the UE in order to optimize management according to network load, access point availability, and system performance requirements. This mechanism ensures that the UE can perform measurements and reports within the configured range, improve resource utilization, and meet network requirements in different scenarios.

[0266] Option 4: Configure the network side to specify the number of access points L reported by the user equipment or the maximum number of access points L. max And the number of beams K reported by each access point or the maximum number of beams K. max The user equipment reports L access points and K beams under each access point, where L≤L max , K≤K max Simultaneously, the network side configures the number S of service access points to be reported, and determines which S service access points are used in a predetermined manner, such as the S service access points with the smallest index among the service access points, where S≤L. The specific S L candidate access points to be reported, and the K beams under each access point, are determined by the user equipment. In some embodiments of this application, the network side can configure the number of service access points reported by the user equipment (UE) through Radio Resource Control (RRC), Medium Access Control Control Element (MAC CE), or Downlink Control Information (DCI). Through this configuration method, the network side can flexibly specify the number of service access points involved when the user equipment reports measurement information, thereby optimizing the utilization of network resources and system performance. This mechanism enables the network to dynamically adjust reporting requirements based on current network conditions, access point availability, and the status of the user equipment, ensuring efficient data transmission and network operation in various scenarios.

[0267] Option 5: Configure the network side to specify the number of access points L reported by the user equipment or the maximum number of access points L. max And the number of beams K reported by each access point or the maximum number of beams K.max The user equipment reports L access points and K beams under each access point, where L≤L max , K≤K max In some embodiments of this application, the network side can configure S service access points to be required to report measurement results. The specific configuration method can indicate which service access points' measurement results need to be reported using at least one of a bitmap, service access point index indication, or combination of methods. The number K of beams reported under each service access point can be selected by the user equipment (UE). This configuration method provides the network with flexibility, enabling it to instruct the UE to perform necessary reporting based on network requirements and resource availability, while giving the UE the autonomy to choose the specific number of beams to report under each service access point, thereby ensuring that important reported information is covered while optimizing the resource utilization efficiency of reporting. For example, assuming the total number of service access points is Q, the network side can indicate which service access points must report using Q bits, where a bit of 0 / 1 indicates reporting, and the opposite indicates no reporting; or the network side can use... Bits indicate the service access point that needs to be reported; or the network side through... The system instructs which service access points (UEs) to report. The specific LS candidate UEs to report, and the K beams under each UE, are determined by the user equipment (UE). In some embodiments of this application, the network side can configure which UE measurement results must be reported via Radio Resource Control (RRC), Medium Access Control Control Element (MAC CE), or Downlink Control Information (DCI). Through these mechanisms, the network side can flexibly instruct UEs to report measurement results for specific UEs, thereby ensuring that critical information required by the network is effectively collected and processed. This configuration method provides the network with greater flexibility and control in managing resources and optimizing reporting strategies.

[0268] In the above scheme, L and L max The value of K can be any value from 1 to 16, and K and K max It can be any value from 1 to 8, S and S max It can be any value from 1 to 8. In the above scheme, L and L... max K and / or K max The values ​​can be configured via RRC / MAC CE / DCI, and L, L maxK and / or K max The values ​​of can also be determined through predefinition. Furthermore, in the above scheme, L and L max K and / or K max One or more of these configurations can be set simultaneously. Unconfigured parameters can be determined through predefined methods or directly selected by the user equipment (UE). These schemes provide the network side with high flexibility and controllability in configuring UE measurement information reporting. By employing Radio Resource Control (RRC), Medium Access Control (MAC) Control Element (MAC CE), or Downlink Control Information (DCI) to configure the number of access points and measurement results reported by the UE, these schemes ensure that the network can dynamically instruct the UE to report measurement information according to actual needs. The UE can flexibly select the number of access points and beams to report within the configured range, thereby optimizing resource utilization and reducing unnecessary data transmission overhead.

[0269] The sixth embodiment of this application proposes a service access point (UE) information reporting selection mechanism during multi-access point updates to optimize the measurement reporting process of user equipment (UE) in multi-access point scenarios. Through various schemes, this embodiment provides flexible configuration methods, enabling UEs to determine the specific service access points and candidate access point measurements to be reported, either under network-side instruction or through autonomous selection. These schemes cover different configuration and selection methods, such as configuring the number of reported access points, the number of beams, and their priorities on the network side, or predefining the service access point reporting mechanism. The network can flexibly adjust the UE's reporting strategy through Radio Resource Control (RRC), Media Access Control Element (MAC CE), or Downlink Control Information (DCI), thereby meeting network requirements while reducing UE feedback overhead and improving resource utilization. These schemes ensure that, under changes in network load and resource availability, UEs can optimize the reported content based on instructions or their own measurements, reduce the transmission of redundant information, and ensure that the network side obtains necessary key information to maintain efficient operation and data transmission.

[0270] Seventh embodiment: When updating multiple access points, the user equipment reports the access point and the beam information under the access point.

[0271] In some embodiments of this application, based on the sixth embodiment, it is assumed that there are a total of P access points, including serving access points and candidate access points, and the total number of beams corresponding to each access point is B. It is assumed that the user equipment ultimately reports L access points, and each access point reports measurement information for K beams. Considering that the total number of serving and candidate access points is large when the user equipment connects to multiple access points simultaneously, the reporting overhead of the user equipment would be significant if the existing LTM indication method in the NR system were used. Therefore, embodiments of this application propose at least one indication scheme as follows to reduce the reporting overhead of the user equipment:

[0272] Option 1: Assuming there are P access points in total, including serving access points and candidate access points, and each access point corresponds to a total of B beams, then a bitmap can be used to indicate which access points are to be reported. Based on the bitmap indication, the access points can then be further indicated with respect to the beam measurement information of those access points. Beam indication can be further achieved using a bitmap, resource index, or combination number. The bit overhead required for a single resource index under an access point is... The bit overhead required for the combination number is Where K is the number of beams selected for each access point. For example, if P=16, B=8, L=4, and K=4, then using the existing resource indexing method, the indexing of a single beam requires... The bit overhead indicates that all beams require 7LK = 112 bits. The bit overhead required by this scheme is:

[0273] The beam indication uses a bitmap: a 16-bit bitmap indicator plus a 32-bit L*B beam indication, for a total of 48 bits.

[0274] Beam indication uses resource indexing: a 16-bit bitmap indicator plus The beam indicator is 64 bits in total.

[0275] Beam indicator combination number indication: 16-bit bitmap indicator plus The beam indicator is 42 bits in total.

[0276] Furthermore, if L=1, then indicating all beams using the existing resource indexing method requires 7LK=28 bits. The bit overhead required by the method described in this scheme is:

[0277] The beam indication uses a bitmap: a 16-bit bitmap indicator plus an L*B = 8-bit beam indication, for a total of 24 bits.

[0278] Beam indication uses resource indexing: a 16-bit bitmap indicator plus The beam indicator is 28 bits in total.

[0279] Beam indication uses resource indexing: a 16-bit bitmap indicator plus The beam indicator is 23 bits in total.

[0280] Alternatively, the indication of the reported access point in the above scheme can also be represented by the index of a single access point or a combination of access points. For example, the bit overhead of the index of a single access point is... The bit overhead of representing combinations is

[0281] In this scheme, it is assumed that the user equipment needs to report P access points (including serving access points and candidate access points), and each access point has B beams. A bitmap can be used to indicate the access points to be reported, and then the beam information to be reported can be further indicated within each indicated access point. The beam indication method can use a bitmap, resource index, or combination number. The bit overhead of a single resource index is... The bit overhead of the combination number is K is the number of beams selected for each access point. For example, when P=16, B=8, L=4, and K=4, the traditional resource indexing method requires 7LK=112 bits, while in this scheme, bitmap indication requires 16 bits, beam indication using bitmap requires 48 bits, resource indexing requires 64 bits, and combination number indication requires 42 bits. If L=1, the traditional resource indexing method requires 28 bits, while this scheme uses bitmap indication (24 bits total), resource indexing (28 bits total), and combination number indication (23 bits total). Furthermore, access point indication can also use a single access point index or combination number method, occupying different amounts of space. or This scheme significantly reduces the reporting overhead of user equipment, and improves reporting efficiency and flexibility.

[0282] Option 2: In some embodiments of this application, Option 2 addresses the scenario mentioned in the sixth embodiment where the network side pre-instructs some service access points to be reported. The access point selection indication can also adopt the scheme described in Option 1 of the sixth embodiment. However, in this case, only access points other than the service access points that must be reported need to be indicated. For example, in a total of P=16 access points, 4 are service access points, and based on network side indication information or a predefined method, it is known that the measurement information of 2 of the 4 service access points must be reported. Then, when indicating access points in Option 1, these two known service access points can be eliminated, and the access point selection indication can be performed on the remaining access points using the method mentioned in Option 1. At this time, the number of access points to be selected is P-2, and different indication methods correspond to different bit overheads. Alternatively, if it is known that the measurement information of 2 service access points must be reported, the user equipment (UE) only needs to further indicate the selected candidate access points from the candidate service access points using the method of Option 1. This method can reduce the reporting overhead of the user equipment in multi-access point scenarios, improve reporting efficiency, and maintain the configuration flexibility of the network side.

[0283] Option 3: In some embodiments of this application, Option 3 addresses the scenario mentioned in the sixth embodiment where the network side pre-instructs the number of Transmission Reception Points (TRPs) to be reported. The selection instruction for the TRPs can also employ the method described in Option 1 of the sixth embodiment. Alternatively, according to the scheme described in Option 1, selection instructions can be given for candidate access points and service access points separately. For example, out of a total of P=16 access points, 4 are service access points. Based on the network side's instruction information or a predefined method, it is known that the measurement information of 2 out of the 4 service access points must be reported, and the user equipment reports 4 access points. In this case, the user equipment can indicate the 2 service access points that need to be reported from the 4 service access points through the serving cell index. In addition, the user equipment can also indicate the 2 candidate access points that need to be reported from the 12 candidate access points through the candidate cell index. This method, while maintaining flexibility, ensures that the user equipment accurately selects and reports services and candidate access points according to the network side's configuration requirements, which helps optimize resource utilization and reduce unnecessary overhead.

[0284] For the above multiple schemes, in addition to indicating which access points and their resource indices, it is also necessary to indicate the access point corresponding to the largest L1 measurement value and its resource index. This information can be indicated using existing resource indexing methods. When P=16, B=8, L=4, and K=4, the index indication for a single beam using existing resource indexing methods requires... The above solutions aim to optimize measurement information reporting by User Equipment (UE) in multi-access-point scenarios, significantly reducing reporting overhead through flexible indication methods. Solution 1 indicates the access points and beams to be reported using bitmaps, resource indexes, or combinations, providing different bit overhead options and significantly reducing the use of reporting resources. Solution 2, when the network side pre-indicates that some service access points must be reported, only indicates the remaining candidate access points, effectively reducing reporting complexity and overhead. Solution 3, when the network side pre-indicates the number of service access points to be reported, allows the UE to select the services and candidate access points to be reported using an index, achieving flexibility and efficiency in reporting. Furthermore, these solutions ensure that the UE selects appropriate access points and beams based on the actual network configuration, optimizing the reporting strategy while reducing unnecessary overhead and improving overall system performance.

[0285] The seventh embodiment proposes several optimization schemes for user equipment (UE) to report access points and their associated beam information during multi-access point updates, aiming to reduce UE reporting overhead and improve reporting efficiency. Scheme 1 uses various methods such as bitmaps, resource indexes, or combination numbers to indicate the access points and beam information to be reported, providing different bit overhead options and effectively reducing resource usage. Scheme 2, when the network side pre-instructs that some service access points must be reported, only selects and reports the remaining candidate access points, thereby simplifying the reporting process and reducing overhead. Scheme 3 allows UE to flexibly select the services and candidate access points to be reported using an index when the network side instructs on the number of service access points to be reported, optimizing reporting flexibility and efficiency. These schemes, through flexible reporting mechanisms, ensure that UEs can efficiently select access points and beams according to network configuration, reducing unnecessary reporting overhead and improving overall network performance and resource utilization.

[0286] Eighth embodiment: Scheme for joint reporting of time offset compensation and L1 measurement.

[0287] In some embodiments of this application, particularly in the sixth embodiment, when a User Equipment (UE) connects to multiple access points, coherent joint transmission (CJT) helps reduce interference between the multiple access points and improves the system's transmission capacity. However, CJT places high demands on the synchronization between the multiple access points. Currently, NR compensates for the delay deviation of coherent joint transmission between multiple Transmission Reception Points (TRPs) by measuring and reporting the delays from the UE, thereby achieving synchronization between multiple TRPs. If the delay deviation between a TRP and a reference TRP exceeds a preset range, that TRP is not suitable for participating in coherent joint transmission.

[0288] Therefore, when a user equipment (UE) connects to multiple access points and uses coherent joint transmission, access point updates may be involved during UE movement, such as adding candidate access points or disconnecting some serving access points. The decision to add or disconnect access points can be based on access point channel measurements reported by the UE. However, even if some candidate access points have good channel quality, if their delay deviation relative to the selected time offset measurement reference access point exceeds a certain compensation range, such as exceeding one or more 0.5 CP lengths, then that access point is still unsuitable for participating in coherent joint transmission services. Based on the discussion at the RAN#118b meeting, it is recommended that UEs store time offset compensation information for up to 2 seconds when it is associated with CJT CSI. Therefore, this embodiment, while measuring access point channel quality, also considers measuring the delay deviation information between access points, given that the change in delay deviation is relatively slow. By combining channel measurement information and delay deviation information, the UE's access point update is jointly determined. This embodiment, while measuring access point channel quality, further considers measuring the delay deviation information between access points because the change in delay deviation is relatively slow. In this way, the decision to update the user equipment's access point can be made based on both channel measurement information and delay deviation information. Existing NR standards already support the configuration and measurement of candidate cell transmission reception points (TRPs). Therefore, this invention suggests that a similar method can be used to configure measurement resources. Specific details can be found in the measurement resource configuration method mentioned in the sixth embodiment, and will not be described in detail here.

[0289] This embodiment focuses on describing the main reporting content when offset measurement results and channel measurement results are jointly reported in the same reporting trigger instance. Specifically, at least one of the following schemes can be adopted:

[0290] Option 1: Assume the network side is configured with the number of access points L reported by the user equipment and the number of beams K under each access point; the user equipment selects a reference resource nref for the time offset compensation value corresponding to the resource under a serving access point from all reported L1 measurements; then the user equipment reports all the selected L access points, and the time offset compensation value {D} of the resources corresponding to the K beams under each access point relative to the reference resource. n,offset The user equipment (UE) reports an indication of whether the time offset compensation value exceeds the maximum delay deviation configured by the network side, {dn, n = 0, 1, ..., LK-2, n ≠ nref}. Here, dn indicates whether the time offset compensation value of the nth resource relative to the reference resource nref exceeds the maximum delay deviation. In some embodiments of this application, this indication can be represented by 1 bit, with the bit being 0 or 1 to indicate whether the time offset compensation value exceeds the maximum delay deviation. It is important to note that in this case, the beam measurement information corresponding to the resources under the serving access point must be reported to ensure that the network side obtains the necessary key data. Furthermore, the UE will also report L access points and report L1 measurements of K beams for each access point, such as Reference Received Power (RSRP) and Signal-to-Noise Ratio (SINR). In this way, the network side can optimize and manage access points based on this information to achieve efficient resource scheduling and system performance improvement. The specific reporting content and data structure can be found in Figure 4D. Figure 4D illustrates how the user equipment transmits time-bias compensation indication information and L1 measurement results in the reporting instance. The bit overhead corresponding to SSBRI is... in The number of SSB resources configured for all access points.

[0291] Option 2: Assume the network side is configured with the number of access points L reported by the user equipment and the number of beams K under each access point; the user equipment selects one resource from all the resources corresponding to the serving access point's beams as a reference resource nref, and then reports all L selected access points, as well as the time offset compensation value {D} of the resources corresponding to the K beams under each access point relative to the reference resource. n,offsetThe user equipment (UE) reports an indication of whether the time offset compensation value of the nth resource relative to the reference resource nref exceeds the maximum time delay deviation configured by the network side. This indication is represented by a single bit (0 or 1) to indicate whether the time offset compensation value exceeds the predetermined maximum time delay deviation. Simultaneously, the UE reports measurement results from L access points and reports L1 measurement values ​​corresponding to K beams under each access point. These L1 measurement values ​​may include information such as Reference Signal Received Power (RSRP), Signal-to-Noise Ratio (SINR), and Reference Signal Received Quality (RSRQ). This mechanism helps the network side more accurately evaluate the time delay compensation of access points and the overall channel quality, thereby optimizing access point selection and updates, and improving system transmission efficiency and stability. The specific reporting content and data structure can be found in Figure 4E, which illustrates how the user equipment transmits time-off compensation indication information and L1 measurement results in a reporting instance. The bit overhead corresponding to SSBRI is... in The number of SSB resources configured for all access points.

[0292] Option 3: Assume the network side is configured with the number of access points L reported by the user equipment and the number of beams K under each access point; the user equipment selects one resource as the reference resource nref from the L reported access points and the resources corresponding to the K beams under each access point; then the user equipment reports the time offset compensation value {D} of all the selected L access points and the resources corresponding to the K beams under each access point relative to the reference resource. n,offsetThe user equipment reports an indication of whether the time offset compensation value exceeds the maximum delay deviation configured on the network side: {dn, n = 0, 1, ..., LK-2, n ≠ nref}. Here, dn indicates whether the time offset compensation value of the nth resource relative to the reference resource nref exceeds the maximum delay deviation. In some embodiments of this application, this indication is represented by 1 bit, where the bit is 0 or 1, used to indicate whether the time offset compensation value exceeds the predefined maximum delay deviation. When the bit is 1, it indicates that the time offset compensation value has exceeded the maximum delay deviation range; when the bit is 0, it indicates that the time offset compensation value has not exceeded this range. Alternatively, when the bit is 0, it indicates that the time offset compensation value has exceeded the maximum delay deviation range; when the bit is 1, it indicates that the time offset compensation value has not exceeded this range. This concise instruction method helps user equipment (UE) transmit critical time offset information more efficiently in multi-access-point scenarios, facilitating network-side decision-making based on time offset compensation and optimizing access point selection and resource scheduling. The UE also reports L access points and the L1 measurement values ​​corresponding to K beams under each access point. The specific reporting content and data structure are shown in Figure 4F, which illustrates how the UE transmits time offset compensation indication information and L1 measurement results in the reporting instance. The bit overhead corresponding to SSBRI is... in The number of SSB resources configured for all access points.

[0293] Option 4: Configure network measurement to report the maximum number of access points L on user devices max And the maximum number of beams K reported by each access point max The user equipment selects a reference resource nref for the time offset compensation value corresponding to a resource under a serving access point from all reported L1 measurements. Then, the user equipment reports the selected L access points and the K values ​​under each access point. l Time offset compensation value of the resource corresponding to each beam relative to the reference resource At the same time, it indicates whether the time offset compensation value reported by the user device exceeds the maximum latency offset configured on the network side. Where dn represents an indication of whether the time offset compensation value of the nth resource relative to the reference resource nref exceeds the maximum delay deviation. In some embodiments of this application, this indication is represented by 1 bit, where the bit is 0 or 1 to indicate whether the time offset compensation value exceeds the predefined maximum delay deviation. When the bit is 1, it indicates that the time offset compensation value has exceeded the maximum delay deviation range; when the bit is 0, it indicates that it has not exceeded this range. Alternatively, when the bit is 0, it indicates that the time offset compensation value has exceeded the maximum delay deviation range; when the bit is 1, it indicates that it has not exceeded this range. It should be noted that in this case, the measurement information of the beam corresponding to the resource under the corresponding service access point will definitely be reported. In addition, the user equipment will also report the L1 measurement values ​​corresponding to L access points and K beams under each access point. This method ensures that the network side can obtain the necessary measurement data in a timely manner to optimize network resource allocation and access point management, and improve system performance and reliability. The specific reporting content and data structure can be found in Figure 4G, which illustrates how the user equipment transmits time-off compensation indication information and L1 measurement results in a reporting instance. The bit overhead corresponding to SSBRI is... in The number of SSB resources configured for all access points; and an indication of whether the above exceeds the maximum latency deviation configured on the network side. Alternatively, no reporting is allowed, and the time offset compensation value corresponding to the resource index reported by the user device can be determined in a predefined way so that it does not exceed the specified maximum range.

[0294] Option 5: Configure the maximum number of access points L reported by user equipment for network measurement max And the maximum number of beams K reported by each access point max The user equipment selects one resource (nref) from all the resources corresponding to the serving access point beams. Then, the user equipment reports the selected L access points and the K values ​​under each access point. l Time offset compensation value of the resource corresponding to each beam relative to the reference resource At the same time, it indicates whether the time offset compensation value reported by the user device exceeds the maximum latency offset configured on the network side. Where d nThis indicates whether the time offset compensation value of the nth resource relative to the reference resource nref exceeds the maximum delay deviation. This indication information is represented by 1 bit; a bit value of 0 or 1 indicates that the time offset compensation value exceeds the maximum delay deviation. In some embodiments of this application, this indication information is represented by 1 bit and used to indicate whether the time offset compensation value exceeds a predefined maximum delay deviation. When the bit is 1, it indicates that the time offset compensation value exceeds the maximum delay deviation; when the bit is 0, it indicates that the time offset compensation value does not exceed this range. Alternatively, when the bit is 0, it indicates that the time offset compensation value exceeds the maximum delay deviation; when the bit is 1, it indicates that the time offset compensation value does not exceed this range. This setting helps the network side quickly determine the delay deviation information between access points, thereby effectively configuring and managing coherent joint transmission, improving system stability and transmission performance. Simultaneously, the user equipment will also report L access points, and K values ​​under each access point. l Each beam corresponds to an L1 measurement. The specific reporting content and data structure are shown in Figure 4H, which illustrates how the user equipment transmits time-off compensation indication information and L1 measurement results in a reporting instance. The bit overhead corresponding to SSBRI is... in The number of SSB resources configured for all access points; and an indication of whether the above exceeds the maximum latency deviation configured on the network side. Alternatively, no reporting is allowed, and the timing offset compensation values ​​corresponding to the resource indexes reported by the user equipment can be determined through a predefined method to ensure that they do not exceed a specified maximum range. In some embodiments of this application, a predefined method can be used to determine that the timing offset compensation values ​​corresponding to the resource indexes reported by the user equipment do not exceed a specified maximum range. This predefined method ensures that when performing measurements and reporting, the user equipment only selects and reports resource indexes whose timing offset compensation values ​​are within the allowable range, thereby optimizing the network side's reception and processing of access point delay offset information. This mechanism helps reduce the transmission of invalid data, improves the effectiveness of reported information, and ensures that access points participating in coherent joint transmission meet synchronization requirements.

[0295] Option 6: Configure network measurement to report the maximum number of access points L on user devices max And the maximum number of beams K reported by each access point max The user equipment selects and reports L access points, and K access points for each access point. l One resource is selected from the resources corresponding to each beam as the reference resource nref. Next, the user equipment reports the selected L access points, and the K values ​​associated with each access point. l Time offset compensation value of the resource corresponding to each beam relative to the reference resource At the same time, it indicates whether the time offset compensation value reported by the user device exceeds the maximum latency offset configured on the network side. Where d n This indicates whether the time offset compensation value of the nth resource relative to the reference resource nref exceeds the maximum delay deviation. This indication is represented by 1 bit; a bit value of 0 or 1 indicates whether the time offset compensation value exceeds the maximum delay deviation. Specifically, a bit value of 0 indicates that the time offset compensation value does not exceed the specified maximum delay deviation; a bit value of 1 indicates that the time offset compensation value exceeds the maximum delay deviation. Alternatively, a bit value of 1 indicates that the time offset compensation value does not exceed the specified maximum delay deviation; a bit value of 0 indicates that the time offset compensation value exceeds the maximum delay deviation. This mechanism helps the network side quickly identify which resources or resource sets have time offset compensation values ​​exceeding the acceptable range, thereby enabling appropriate decisions and adjustments in multi-access point coherent joint transmission. Simultaneously, the user equipment will also report L access points, and K values ​​under each access point. l Each beam corresponds to an L1 measurement value. The specific reporting content and data structure are shown in Figure 4I, which illustrates how the user equipment transmits time-off compensation indication information and L1 measurement results in a reporting instance. The bit overhead corresponding to SSBRI is... in The number of SSB resources configured for all access points; and an indication of whether the above exceeds the maximum latency deviation configured on the network side. Alternatively, no reporting is allowed. Through a predefined mechanism, it can be ensured that when user equipment reports resource indexes, the corresponding time offset compensation values ​​do not exceed the specified maximum range. This predefined mechanism helps ensure that user equipment only reports resource indexes that meet the latency offset requirements and their corresponding time offset compensation values, thereby reducing unnecessary reporting and network load. In this way, the network side can more efficiently manage and judge the reported information from user equipment and adjust the collaborative configuration of access points in a timely manner, ensuring the synchronization performance of the system in multi-access-point coherent joint transmission.

[0296] The reported content in the above-mentioned schemes can be combined in any order as needed, without specific restrictions. Furthermore, assuming that the L1 measurement resource uses the Synchronization Signal Block (SSB) resource, it can also be extended to use other measurement resources, such as Channel State Information Reference Signal (CSI-RS), Transmission Reception Point (TRP), Demodulation Reference Signal (DMRS), etc. In this case, the resource index in the reported content only needs to be changed to the corresponding resource index. For example, when using CSI-RS resources for measurement, simply change SSBRI#X to CSI-RS-RI#X.

[0297] Furthermore, the method for indicating the access point and the corresponding resource index of the selected beam under the access point, as proposed in the seventh embodiment, is also applicable to the aforementioned schemes. Therefore, it is only necessary to replace the resource index information in the above schemes with the indication scheme described in the seventh embodiment. This flexibility allows user equipment to flexibly select and report between different measurement resources and schemes based on network-side indications and current network conditions, thereby improving system operational efficiency and resource utilization.

[0298] The eighth embodiment proposes several schemes for user equipment (UE) to jointly report time offset compensation and L1 measurement in multi-access point scenarios to support the implementation of Coherent Joint Transmission (CJT). Due to the high synchronization requirements of multiple access points, this embodiment aims to optimize access point updates and resource scheduling by combining time offset compensation information and channel measurement results. Specific schemes include the UE selecting reference resources based on network-side configuration and reporting the time offset compensation values ​​and L1 measurement results for each access point and its beam, while indicating whether the time offset compensation value exceeds a preset range. Various indication methods, such as bitmaps, resource indexes, and combination numbers, are used to optimize reporting overhead. Each scheme flexibly utilizes time offset compensation information to ensure synchronization requirements, reduce reporting burden, and improve system performance. Furthermore, the scheme supports various measurement resources and indication methods, such as Synchronization Signal Blocks (SSBs) and Channel State Information Reference Signals (CSI-RS), thereby providing more efficient system management and operation.

[0299] Ninth embodiment: Network side indicates updated access point.

[0300] In some embodiments of this application, based on the resource configuration method in the sixth embodiment, in existing NR systems, handover commands in LTM scenarios are typically carried through a Medium Access Control Element (MAC CE), mainly used to instruct User Equipment (UE) to hand over from the currently serving cell to a new target cell. However, in scenarios where the UE connects to multiple Transmission Reception Points (TRPs) or access points, the UE may exhibit the following behaviors based on network-side instructions: Behavior 1: The UE may disconnect from at least one serving access point while simultaneously establishing a connection with at least one candidate access point. Behavior 2: The UE may not disconnect from any serving access point but will establish a connection with at least one candidate access point. Behavior 3: The UE may disconnect from at least one serving access point without establishing a new connection with any new candidate access point. The instruction information sent by the network to the UE may differ depending on these different behaviors. Therefore, this embodiment mainly considers how the network can instruct the UE based on different behaviors, and at least one of the following solutions can be adopted:

[0301] Option 1: In some embodiments of this application, based on the resource configuration method mentioned in the sixth embodiment, each resource or resource set is associated with a resource or resource set index. The User Equipment (UE) can distinguish the access point corresponding to each resource or resource set through this index information. Assuming that the serving access point and the candidate access point correspond to different measurement resource sets, the UE can identify whether these resource sets correspond to serving access points or candidate access points based on the index of the measurement resource set. Then, the UE can further distinguish the specific serving access point or candidate access point through the index of the resources, resource groups, or resource subsets within the resource set. If it is assumed that the serving access point and the candidate access point correspond to different measurement resource groups or resource subsets, the UE can identify whether it is a serving access point or a candidate access point based on the index of the measurement resource group or resource subset, and further distinguish which specific serving access point or candidate access point it is through the resource index within the resource group or resource subset. In this way, through the index information, the UE can accurately identify and distinguish each access point and its corresponding measurement resources, achieving a more efficient resource management and reporting process.

[0302] In some embodiments of this application, it can be assumed that the measurement resources of the serving access point and the candidate access point are located in the same measurement resource set, and each serving access point and / or candidate access point corresponds to a resource group or resource subset. In this case, the user equipment (UE) can distinguish whether the current resource index, resource subset index, or resource group index corresponds to a serving access point or a candidate access point by using the resource index, resource subset index, or resource group index in the measurement resource set. Alternatively, assuming that each serving access point and candidate access point corresponds to an independent measurement resource set, the UE can directly distinguish whether the resource set corresponds to a serving access point or a candidate access point based on the index of the measurement resource set. In this way, the UE can effectively distinguish and identify the source of measurement resources through index information, improving resource management and reporting efficiency in multi-access point scenarios.

[0303] Based on the above description, this embodiment provides an access point update indication scheme covering three behaviors: behavior 1, behavior 2, and behavior 3. This scheme uses 2-bit encoding to represent these three behaviors. For example, the bit sequence "00" represents behavior 1 (disconnecting a serving access point and establishing a candidate access point connection), the bit sequence "01" represents behavior 2 (establishing a connection with a candidate access point), and the bit sequence "10" represents behavior 3 (disconnecting a serving access point). To ensure the stability of user equipment performance, the standard stipulates that the status of a maximum of two access points can be updated at a time.

[0304] For Action 1, the user equipment needs to disconnect from a serving access point and simultaneously establish a connection with a candidate access point. This instruction command will contain configuration identifiers (Config IDs) for the two access points, one for disconnection and one for the newly added access point. The user equipment can determine whether the access point is a serving access point or a candidate access point based on these Config IDs. The Config ID can be a resource index, resource set index, or resource group / subset index.

[0305] Furthermore, the access point update indication information may include a Timing Advance Command, which is associated with the candidate access point ID; that is, one candidate access point ID corresponds to one timing advance command. The update indication information may also contain at least one Transmission Configuration Indicator (TCI) status ID and at least one uplink (UL) TCI status ID, used to indicate the TCI status and uplink TCI status corresponding to the candidate access point ID. This mechanism helps user equipment efficiently manage and update access points, ensuring synchronization and performance of communication with the network side in multi-access point scenarios.

[0306] Figure 4J is a schematic diagram of a network-side indication for updating access points according to an embodiment of this application. For example, in Figure 4J, the 2-bit field used to indicate the service access point update behavior is set to "00", which means that the user equipment needs to disconnect the service access point corresponding to configuration identifier (Config ID) 0 and establish a connection with the candidate access point corresponding to configuration identifier (Config ID) 1. In addition, the advance timing command (TA command 1), transmission configuration indication state (TCI state 1), and uplink transmission configuration indication state (UL TCI state 1) correspond to the configuration information of the candidate access point of Config ID 1, respectively. This indication method helps the user equipment to clearly understand the access point update operation that needs to be performed and accurately configure the connection parameters with the new candidate access point, thereby maintaining stable network communication.

[0307] It is important to note that the values ​​of the configuration identifiers (Config ID) 0 and Config ID 1 may be the same or different. This is because Config ID 0 and Config ID 1 can belong to the same resource set, resource group, or resource subset, or they can belong to different resource sets, resource groups, or resource subsets. Therefore, in practical implementations, user equipment needs to flexibly determine and parse the corresponding resource configuration based on the indication information to ensure the correct identification and update operations of service access points and candidate access points. This flexibility enables the network side to more effectively manage the connection status of user equipment and meet the needs of dynamic network environments.

[0308] Option 2: Based on the resource configuration method mentioned in the sixth embodiment, each resource or resource set corresponds to a resource or resource set index. The user equipment can distinguish which access point a resource or resource set corresponds to using the resource or resource set index. Under this assumption, the serving access point and the candidate access point correspond to different measurement resource sets. The user equipment can distinguish whether it corresponds to a serving access point or a candidate access point based on the index of the measurement resource set, and then further distinguish which specific serving access point or candidate access point it corresponds to based on the index of the resources, resource groups, or resource subsets within the resource set. Alternatively, assuming that the serving access point and the candidate access point correspond to different measurement resource groups or resource subsets, the user equipment can distinguish whether it corresponds to a serving access point or a candidate access point based on the index of the measurement resource group or resource subset, and then distinguish which specific serving access point or candidate access point it corresponds to based on the resource index within the resource group or resource subset. Furthermore, assuming that each serving access point and candidate access point corresponds to a measurement resource set, the user equipment can also distinguish whether the resource set corresponds to a serving access point or a candidate access point using the index of the measurement resource set. This approach enables user equipment to flexibly determine and differentiate access point types based on different resource configurations in complex multi-access point environments, ensuring the accuracy and effectiveness of measurement and reporting.

[0309] Based on the above description, the update behavior of the access point can be divided into three cases: behavior 1, behavior 2, and behavior 3. To represent these different behaviors, this embodiment uses a 2-bit encoding method. For example, bit sequence 00 is used to represent behavior 1, bit sequence 01 is used to represent behavior 2, and bit sequence 10 is used to represent behavior 3. This encoding method provides a simple and effective way to indicate different operations of user equipment in access point updates, enabling the network side to more accurately control the connection management of user equipment in a multi-access point environment. This method can improve the flexibility of the system and the response speed of user equipment, ensuring efficient connection switching and management in a multi-access point environment.

[0310] For behavior 1, the user equipment (UE) uses X bits to indicate disconnecting from S serving access points and Y bits to indicate establishing connections with C candidate access points. Then, it configures S and C Config IDs respectively to indicate the S serving access points and C candidate access points. The UE can distinguish which Config IDs correspond to serving access points and which to candidate access points based on this Config ID information. Furthermore, the index range of the Config IDs for serving and candidate access points can be predefined. For example, the index of the Config IDs for serving access points can be predefined to be smaller, while the index of the Config IDs for candidate access points can be larger, or vice versa. In this way, the UE can quickly determine and manage access point update operations, thereby achieving efficient connection management and resource allocation in multi-access-point scenarios.

[0311] For Action 2, the user equipment (UE) uses Y bits to indicate the establishment of connections with C candidate access points and configures C Config IDs to indicate these candidate access points. The UE can distinguish the specific candidate access point using these Config IDs, thus enabling effective connection management and configuration. In this case, the X bit field is used to indicate the disconnected service access point, which can be represented by all zeros. This means that the UE does not disconnect from the service access point in Action 2. In this way, the network side can clearly instruct the UE to connect to candidate access points without affecting existing service access point connections, ensuring the flexibility and effectiveness of the UE in multi-access point scenarios.

[0312] For behavior 3, the user equipment (UE) uses X bits to indicate disconnection from S service access points and configures S Config IDs to indicate these service access points. The UE can distinguish the specific service access point to be disconnected using these Config IDs and perform the corresponding disconnection operation. In this case, the Y bit field is used to indicate the establishment of a connection with a candidate access point, which can be represented by all zeros, meaning that the UE does not involve connecting to candidate access points in behavior 3. Through this configuration, the network side can clearly instruct the UE to only disconnect from the service access points without additional processing of connecting to candidate access points, ensuring the clarity and effectiveness of the instruction in multi-access-point scenarios.

[0313] Figure 4K is a schematic diagram of a network-side indication for updating an access point according to an embodiment of this application. In this scheme, indicating the behavior of updating the access point is not mandatory, and it is also possible to omit specifying the particular behavior and directly indicate disconnection from the maximum S using the X and / or Y bits respectively. max The connection and / or establishment of a service access point with the maximum Cmax The connection to each candidate access point is determined. If the field corresponding to either the X or Y bit is all 0, it indicates that the connection to the serving access point has not been disconnected or a connection to the candidate access point has not been established. See Figure 4K for details.

[0314] It's important to note that the values ​​of Config ID 0 and Config ID 1 / 2 may be the same, as they can be associated with different measurement resource sets. Specifically, X=1 indicates disconnecting the service access point corresponding to Config ID 0, and Y=2 indicates establishing connections with the candidate access points corresponding to Config ID 1 and Config ID 2. This configuration method allows user devices to flexibly disconnect service access points and connect candidate access points in multi-access-point scenarios. By configuring multiple Config IDs, user devices can distinguish and manage the connection status of different access points, enabling effective responses to network commands and supporting complex multi-access-point update requirements.

[0315] For the above scheme, the access point update indication information may also include the maximum C. max Each timed advance command indicates a corresponding Config ID for a candidate access point. One Config ID corresponds to one timed advance command, and this correspondence can be established sequentially. For example, Figure 4K indicates two candidate access point Config IDs, Config ID 1 and Config ID 2, and two TA Commends, TA Commend 1 and TA Commend 2. In this case, Config ID 1 corresponds to TA Commend 1, and Config ID 2 corresponds to TA Commend 2. Additionally, the service access point update command may also contain a maximum C... max Each TCI status ID, and the maximum C maxEach UL TCI state ID indicates the TCI state corresponding to a candidate access point's Config ID, and the UL TCI state indicates the uplink TCI state corresponding to the candidate access point's Config ID. The correspondence between the TCI state information, UL TCI state information, and candidate access point Config IDs can be matched sequentially. Specifically, as shown in Figure 4K, Config ID 1 corresponds to TCI state 1 / UL TCI state 1, and Config ID 2 corresponds to TCI state 2 / UL TCI state 2. This sequential matching configuration simplifies the processing logic of user equipment in multi-access point update scenarios, enabling user equipment to quickly determine the TCI state and uplink TCI state of each candidate access point based on received configuration instructions. This improves the user equipment's response efficiency and flexibility to network indication information, contributing to more efficient uplink and downlink transmission management.

[0316] In this scheme, the bit widths corresponding to X and Y can be respectively obtained through... and To determine, where S max C represents the maximum number of service access points that a user equipment can potentially disconnect from in a single L1 measurement. max S represents the maximum number of candidate access points that a user equipment can potentially establish a connection with based on a single L1 measurement, and S max and / or C max This can be determined through network-side configuration or through standard predefined definitions, and S max and / or C max It can take multiple values, for example, S max ={1,2,4,8},C max ={1,2,4,8}, specific S max and / or C max Which value to use depends on the capabilities of the user's device, S max and / or C max The specific values ​​are configured by the network side via RRC / MAC CE / DCI.

[0317] Option 3: Based on the resource configuration method mentioned in the sixth embodiment, each resource or resource set has corresponding resource or resource set index information. The User Equipment (UE) can use this index information to distinguish which access point a resource or resource set is associated with. In some embodiments of this application, assuming that the serving access point and the candidate access point correspond to different measurement resource sets, the UE can determine whether it is associated with a serving access point or a candidate access point based on the index of the measurement resource set. Then, the UE can further distinguish which specific serving access point or candidate access point it corresponds to using the resource index, resource group index, or resource subset index within the resource set. Alternatively, in another scenario, assuming that the serving access point and the candidate access point correspond to different measurement resource groups or resource subsets, the UE can also determine whether it is associated with a serving access point or a candidate access point using the index of the measurement resource group or resource subset, and identify the specific access point based on the resource index within the resource group or resource subset. Furthermore, if each serving access point and candidate access point corresponds to a measurement resource set, the UE can directly distinguish whether the resource set corresponds to a serving access point or a candidate access point using the index of the measurement resource set. This indexing method provides user equipment with a clear indication path, enabling it to effectively process resource information associated with access points and improve measurement and reporting efficiency in multi-access point scenarios.

[0318] Figure 4L is a schematic diagram of a network-side indication for updating access points according to an embodiment of this application. Then, the network side uses a Config ID in the service access point update instruction to indicate which service access points have been disconnected and / or which candidate access points have been established. Each Config ID is preceded by a 1-bit indicating whether it corresponds to a service access point or a candidate access point, or whether it corresponds to the measurement resource set of a service access point or a candidate access point. For example, if the 1-bit indication is 0 / 1, it means the corresponding Config ID is associated with a service access point / candidate access point; otherwise, it means it is associated with a candidate access point / service access point. Similarly, if the 1-bit indication is 0 / 1, it means the corresponding Config ID corresponds to the measurement resource set of a service access point / candidate access point; otherwise, it means it is associated with the measurement resource set of a candidate access point / service access point.

[0319] In the embodiment of this application shown in Figure 4L, the network side instructs the User Equipment (UE) to disconnect from certain serving access points and / or establish connections with candidate access points via a Serving Access Point Update command. This instruction is specifically indicated using Config IDs, each Config ID preceded by a 1-bit identifier indicating whether the Config ID corresponds to a serving access point or a candidate access point, or whether the measurement resource set corresponding to the Config ID is a serving access point or a candidate access point. For example, when the 1-bit identifier is 0, it indicates that the current Config ID is associated with a serving access point; if it is 1, it indicates that it is associated with a candidate access point. Alternatively, when the 1-bit identifier is 0, it indicates that the Config ID corresponds to the measurement resource set of a serving access point; if it is 1, it corresponds to the measurement resource set of a candidate access point. This method ensures that the network side can clearly distinguish the access point type and resource set that the UE needs to operate on when instructing access point updates, facilitating correct connection management and resource operations for the UE in a multi-access point environment. The specific implementation is shown in Figure 4L, illustrating application examples of different Config IDs and their preceding 1-bit identifier.

[0320] It's important to note that the values ​​of Config ID 0 and Config ID 1 / 2 may be the same, as they can be associated with different measurement resource sets. This means that even if the specific values ​​of the Config IDs are the same, they may correspond to different measurement resource sets for the serving access point and the candidate access point, respectively. In this way, user equipment can effectively identify and distinguish the access points and their associated measurement resource sets corresponding to these configuration commands based on the Config ID, thereby achieving accurate measurement and connection management in complex multi-access point scenarios, improving resource utilization efficiency and operational flexibility.

[0321] For the above scheme, the access point update indication information may also include Timing Advance (TA) command indications. This indication information corresponds to the Config ID information of the candidate access points, with each candidate access point Config ID corresponding to one timing advance command. The correspondence between the two can be sequential. For example, Figure 4L indicates the Config IDs of two candidate access points, Config ID 1 and Config ID 2, and also indicates two TA commands, TA Commend 1 and TA Commend 2. Therefore, Config ID 1 corresponds to TA Commend 1, and Config ID 2 corresponds to TA Commend 2. Furthermore, the service access point update command may also include Transmission Configuration Indication (TCI) status ID information and Uplink Transmission Configuration Indication (UL TCI) status ID information. The TCI status information is used to indicate the TCI status corresponding to the candidate access point Config ID, while the UL TCI status information is used to indicate the uplink TCI status corresponding to the candidate access point Config ID. The correspondence between these status information and the candidate access point Config IDs can also be sequential. For example, in Figure 4L, Config ID 1 corresponds to TCI status 1 and UL TCI status 1, and Config ID 2 corresponds to TCI status 2 and UL TCI status 2. Through this structure, the network side can accurately manage the coordination between multiple access points, ensuring efficient connection and communication of user equipment in complex multi-access point environments.

[0322] Option 4: Based on the resource configuration method mentioned in the sixth embodiment, each resource or resource set corresponds to a resource or resource set index. The user equipment (UE) can use this index to identify which access point the corresponding resource or resource set belongs to. Assuming the serving access point and candidate access points are associated with different measurement resource sets, the UE can distinguish whether it is a serving access point or a candidate access point using the index of the measurement resource set. Furthermore, the UE can also identify a specific serving access point or candidate access point using the index of a resource, resource group, or resource subset within the resource set. If the serving access point and candidate access point correspond to different measurement resource groups or resource subsets, the UE can determine whether they are serving access points or candidate access points based on these indexes, and further determine the specific access point using the resource index within the resource group or subset. Alternatively, assuming each serving access point and candidate access point is associated with an independent measurement resource set, the UE can directly distinguish whether the resource set corresponds to a serving access point or a candidate access point based on the index of the measurement resource set. Through this resource configuration method, the UE can accurately distinguish and process measurement resources from different access points in complex multi-access point environments, contributing to more efficient resource management and measurement reporting.

[0323] Based on the above description, access point updates can be summarized into three main behaviors: Behavior 1, Behavior 2, and Behavior 3. To identify these three behaviors in the indication information, this embodiment uses 2-bit encoding, for example: bit sequence 00 represents Behavior 1, 01 represents Behavior 2, and 10 represents Behavior 3. Behavior 1: The user equipment disconnects from the current serving access point while establishing a connection with a new candidate access point. Behavior 2: The user equipment does not disconnect from any serving access point but simultaneously establishes a connection with a new candidate access point. Behavior 3: The user equipment disconnects from at least one serving access point but does not establish a new candidate access point connection. Representing these three update behaviors with 2-bit encoding simplifies the signaling interaction between the user equipment and the network side, improving the efficiency of indication information transmission and the clarity of interpretation.

[0324] Figure 4M illustrates a schematic diagram of the network side's function for instructing access point updates in an embodiment of this application. In scenario 1, the network side pre-defines which service access points the user equipment (UE) disconnects from or which candidate access points it establishes connections with, through a predefined method. Each Config ID can be preceded by a 1-bit indication to indicate whether a Config ID of the same type exists after it. Here, "same type" means that the access point associated with the Config ID is either a service access point or a candidate access point. For example, when instructing the UE to disconnect from a service access point, the 1-bit indication can be used to identify whether there are more service access point Config ID configurations; similarly, when instructing the UE to establish a connection with a candidate access point, the 1-bit indication is also used to identify whether there are more candidate access point Config ID configurations subsequently. In this way, the network can clearly convey the structure of the updated access points, simplifying the UE's parsing process of the indication information. It should be noted that Config ID 0 and Config ID 1 / 2 may have the same value because these IDs can be associated with different measurement resource sets, resource subsets, or resource groups. In this case, even if the Config ID values ​​are the same, they still point to different measurement resource configurations, thereby achieving flexible connection and update management.

[0325] In Figure 4M, the 1-bit indication information of the row containing Config ID 0 is 0, indicating that the subsequent Config ID 1 is not a connection point of the same type as Config ID 0 in the current row; while the 1-bit indication information of the row containing Config ID 1 is 1, indicating that the subsequent Config ID 2 is a connection point of the same type as the current Config ID 1, i.e., both are candidate access points. The 1-bit indication information of the row containing Config ID 2 is 0, indicating that the indication of the Config ID has been completed. In addition, the access point update indication information may also include Timing Advance (TA) command indication, which corresponds to the Config ID information of the candidate access points. Each candidate access point Config ID corresponds to one TA command, and the correspondence between the two can be sequential. For example, in Figure 4M, if two candidate access point Config IDs are indicated, namely Config ID 1 and Config ID 2, and two TA commands are indicated, namely TA Commend1 and TA Commend2, then Config ID 1 corresponds to TA Commend1, and Config ID 2 corresponds to TA Commend2. Additionally, the service access point update command may also include Transmission Configuration Indicator (TCI) status ID information and uplink (UL) TCI status ID information. The TCI status information indicates the TCI status associated with the corresponding candidate access point Config ID, while the UL TCI status information indicates the uplink TCI status associated with the candidate access point Config ID. The relationship between the TCI status information, UL TCI status information, and the candidate access point Config ID is sequential, as shown in Figure 4M: Config ID 1 corresponds to TCI state 1 / UL TCI state 1, and Config ID 2 corresponds to TCI state 2 / UL TCI state 2.

[0326] In Figure 4N, for scenario 2, each Config ID is preceded by a 1-bit indicator to indicate whether there are any subsequent Config IDs of the same type. "Same type" means that the Config IDs are associated with the same access point type, i.e., both are serving access points or candidate access points. For example, in Figure 4N, the 1-bit indicator for the row containing Config ID 0 is 1, indicating that the subsequent Config ID 1 is a connection point of the same type as the current Config ID 0, both being candidate access points. The 1-bit indicator for the row containing Config ID 1 is 0, indicating that the Config ID indication is complete. Access point update indication information may also include Timing Advance (TA) command indications, Transmission Configuration Indicator (TCI) status ID information, and Uplink (UL) TCI status ID information. These indications correspond to the Config ID information of candidate access points. A candidate access point Config ID can correspond to one TA command, one TCI status ID, and / or one UL TCI status ID, and the correspondence between them can be sequential. For example, Config ID 0 corresponds to the specific status information of TA Commend, TCI state, and UL TCI state, and Config ID 1 also has its corresponding indication information, ensuring that the user equipment can correctly parse and execute update commands related to the candidate access point.

[0327] In Figure 40, for scenario 3, each Config ID is preceded by a 1-bit indication to indicate whether there are any Config IDs of the same type following it. "Same type" means the Config IDs are associated with the same access point type, such as both being service access points or candidate access points. In this figure, the user equipment can use the 1-bit indication to identify whether subsequent Config IDs belong to the same type of access point as the Config ID in the current row. For example, Figure 40 shows that the 1-bit indication for the row containing Config ID 0 is 1, indicating that the subsequent Config ID 1 belongs to the same type of access point as the current Config ID 0, such as both being service access points. The 1-bit indication for the row containing Config ID 1 is 0, indicating that the Config ID indication is complete and there are no more Config IDs of the same type. In this scheme, the access point update indication information can also include other indication information associated with each Config ID, such as Timing Advance (TA) commands, Transmission Configuration Indicator (TCI) status ID information, and Uplink (UL) TCI status ID information. This information corresponds to a Config ID and is arranged in order to ensure that the user device can correctly resolve the operation corresponding to each Config ID.

[0328] In Figure 40, the 1-bit indication information of the row containing Config ID 0 is 1, indicating that the subsequent Config ID 1 and the current Config ID 0 belong to the same type of connection point, that is, they are both service access points. This indication method allows the user equipment to resolve the association type between subsequent Config IDs and the current Config ID, thereby identifying whether they belong to the same group of access points. Correspondingly, the 1-bit indication information of the row containing Config ID 1 is 0, indicating that the Config ID indication in this row has ended, and there are no more Config IDs of the same type after it. This design helps the user equipment accurately resolve the access point type in a multi-access point environment, ensuring that it can correctly understand the update indications from the network side and perform corresponding connection management and resource adjustments.

[0329] In Scheme 5, the user equipment (UE) identifies resources using the resource configuration method mentioned in the sixth embodiment. Each resource or resource set has corresponding resource / resource set index information. The UE can determine which access point a resource or resource set corresponds to based on this index information. Specifically, when the measurement resources of a serving access point and a candidate access point are in the same measurement resource set, each serving access point or candidate access point can be associated with a resource group or resource subset. By parsing the resource index, resource subset index, or resource group index within the measurement resource set, the UE can distinguish whether the resource pointed to by the index belongs to a serving access point or a candidate access point. Furthermore, if it is assumed that each serving access point and candidate access point corresponds to an independent measurement resource set, the UE can directly distinguish the type of resource set, i.e., serving access point or candidate access point, through the index of the measurement resource set. This approach facilitates measurement and reporting management in complex multi-access point environments, enabling the UE to flexibly respond to the measurement needs of different access points and improve the overall system performance and reporting efficiency.

[0330] Figure 4P illustrates the specific implementation of the network-side instruction for updating access points in this embodiment of the application. The network side configures the Config ID information of the access points that need to be updated in the service access point update instruction information. Based on this configured Config ID information, the user equipment determines whether to disconnect the service access point corresponding to the Config ID or establish a connection with the candidate access point corresponding to the Config ID. Figure 4P details how to distinguish different access points and their update operations based on the Config ID information, ensuring that the user equipment can accurately and effectively manage connections in a multi-access point environment.

[0331] In this embodiment, Figure 4P illustrates service access point update indication information, where Config ID 0 corresponds to the service access point, and Config ID 1 corresponds to the candidate access point. The service access point update indication information may also include a timed advance command indication, TCI status ID information, and / or uplink TCI status ID information. This indication information corresponds to the Config ID information of the candidate access point; one candidate access point Config ID corresponds to one timed advance command, one TCI status ID, and / or one uplink TCI status ID. The correspondence between the two can be sequential, ensuring that the user equipment can accurately identify and execute connection or configuration operations with the candidate access point based on this information.

[0332] In this embodiment, Config ID 0 corresponds to the service access point, while Config ID 1 corresponds to the candidate access point. The service access point update indication information may also include a timed advance command indication, TCI status ID information, and / or UL TCI status ID information. The above indication information corresponds one-to-one with the Config ID information of the candidate access points; each candidate access point Config ID is associated with a timed advance command, a TCI status ID, and / or UL TCI status ID. The correspondence between the two can be sequential so that the user equipment can accurately identify and execute updates, ensuring effective connection and configuration management in multi-access point scenarios.

[0333] It should be noted that the Config ID in the above-mentioned schemes can be the cell ID corresponding to the service access point or candidate access point, or it can be the ID information of the resource, resource group, resource subset, or resource set corresponding to the service access point or candidate access point. This design flexibility enables user equipment to accurately identify and manage the connection and resource allocation of services or candidate access points according to different scenarios and configuration requirements, improving operational efficiency and management flexibility in multi-access point scenarios.

[0334] Secondly, the service access point update indication information in the aforementioned schemes may also include field C to indicate the presence of a contention-free random access resource field. This field is designed identically to field C in existing LTM handover commands. If this field is set to 1, it indicates the presence of at least one of the following fields: random access preamble index field, S / U field, SS / PBCH index field, CSI-RS index field, PRACH mask index field, repetition count field, and reserved bits within the same octet. This design aims to ensure the provision of necessary random access resources during multi-access point updates, further improving the communication stability and efficiency between the network side and user equipment.

[0335] The ninth embodiment proposes a scheme for the network side to instruct user equipment (UE) to perform access point updates in a multi-access point scenario. This embodiment details three possible behaviors of the UE when receiving instructions from the network side: disconnecting from at least one serving access point and adding a connection to a candidate access point; adding a connection only to a candidate access point; and disconnecting from the serving access point without adding a candidate access point. To achieve these behaviors, the network side instructs the UE's operations using 2-bit encoding, for example, by explicitly indicating different behaviors through bit sequences. Furthermore, through the Config ID and additional instruction fields, the UE can distinguish the access point type associated with the resource and perform connection management and update operations accordingly. The instruction information may also include details such as timed advance commands, transmission configuration indication status, and uplink transmission configuration indication status to ensure that the UE accurately executes access point update instructions. This flexible and efficient mechanism optimizes resource allocation and management in a multi-access point environment, improving system performance and the responsiveness of the UE.

[0336] Tenth Example: CSI computation time under LTM.

[0337] In some embodiments of this application, LTM (L1 / L2 triggered mobility) is introduced in Rel-18. Compared to traditional L3 measurement-triggered mobility, LTM offers significant improvements in handover latency and downtime. However, the LTM operation introduced in Rel-18 also has some limitations. First, LTM operation only supports mobility management between cells within the same gNB (i.e., the same CU). This limitation depends on the specific network deployment and may significantly reduce the opportunities for LTM usage. If LTM operation can be implemented between cells across different gNBs (i.e., across CUs), the network will be able to benefit from the latency and downtime optimizations offered by LTM in more handover scenarios. This will expand the applicability of LTM, enabling the network to achieve performance improvements in a wider range of handover scenarios.

[0338] Secondly, in the existing NR standard, when a User Equipment (UE) switches from one cell to another, channel measurements are needed to obtain the corresponding precoding information for the new target cell. Therefore, before obtaining this precoding information, the base station can only communicate with the terminal at a lower code rate or a lower modulation and coding scheme (MCS) level. To address this issue and maintain a higher code rate or MCS level after the terminal switches to the new cell, CSI feedback to the new cell can be performed before the handover, or rapid CSI feedback can be performed after the handover. This approach helps the base station maintain a high communication rate after the terminal switches to the new cell, thereby improving communication quality and efficiency after the handover.

[0339] Under LTM (L1 / L2 triggered mobility), there are currently three possible schemes for CSI (Channel State Information) measurement and reporting: 1. CSI-RS measurement and CSI reporting are completed before receiving the LTM Cell Handover Command (CSC) MAC CE: The report is sent to the serving cell and then forwarded to the candidate or target cell. This method allows the terminal to complete CSI measurements and generate reports in advance, ensuring that information is delivered to the target cell in a timely manner. 2. CSI-RS measurement can begin before receiving the LTM CSC MAC CE, but CSI reporting is performed after receiving the LTM CSC MAC CE: The report is sent directly to the target cell. This method flexibly allows measurements to start before the handover command, but is only reported after handover confirmation, ensuring that information is effectively delivered to the target cell. 3. Both CSI-RS measurement and CSI reporting are performed after receiving the LTM CSC MAC CE: In this case, the report is sent directly to the target cell. This method is suitable for faster CSI feedback requirements, allowing for rapid transmission of measurement data after handover. When CSI-RS measurements and CSI reporting are performed before receiving the LTM Cell Handover Command (CSC) MAC CE, the terminal may need to measure the CSI of multiple cells before handover and may report the CSI information of multiple cells. For aperiodic CSI reporting, when the codebook type is Type-I and Type-II, the CSI processing time of the serving cell can be represented by parameters Z2 and Z′2, where Z2 represents the time elapsed since the last symbol of the PDCCH that triggered the aperiodic CSI-RS transmission; and Z′2 represents the time elapsed since the last symbol of the PDCCH that triggered the aperiodic CSI-RS transmission. ′ This indicates the time elapsed since the terminal received the last symbol of the CSI-RS measurement resource (Z′2). These timing parameters help coordinate the timing of the terminal's CSI reporting, ensuring the continuity and effectiveness of communication during handover between the serving cell and the target cell.

[0340] In LTM (L1 / L2 triggered mobility) scenarios, the terminal needs to simultaneously measure the CSI (Channel State Information) of both the candidate cell and the serving cell, which increases the time required for CSI measurement and calculation. This increased time depends not only on the number of cells for which the terminal is simultaneously calculating CSI, but also on the number of CSIs that need to be calculated for each cell. Therefore, some embodiments of this application are discussed in the following two scenarios:

[0341] Scenario 1: Assume that each cell that selects to provide feedback on CSI will only provide feedback on one CSI at most:

[0342] Based on the above assumptions, when the terminal provides non-periodic CSI feedback, at least one CSI feedback is triggered by a triggering instance and fed back within a reporting instance. In this scenario, each cell is configured with one CSI-RS resource or a set of CSI-RS resources containing a unique CSI-RS resource. Which cells' CSIs are specifically fed back on the terminal side can be determined based on the network-side configuration. The configuration method can adopt at least one of the following approaches:

[0343] Method 1: The network side is configured with the number of cells L to be jointly reported by CSI. The specific L cells to be reported are determined by the terminal based on the network side configuration.

[0344] Method 2: Configure the network side to jointly report the maximum number of cells L using CSI. max The specific L cells to be reported based on the network-side configuration are determined by the terminal, where L≤L max .

[0345] Method 3: Configure the network side to jointly report the number of cells L or the maximum number of cells L. max Meanwhile, the network side is also configured to report the CSI corresponding to K cells. The specific LK cells to be reported are determined by the terminal based on the network side configuration, where K≤L and L≤L max .

[0346] In the above methods, parameters L, L max The configuration of K can be achieved through RRC / MAC CE / DCI, and the indication of K cells can be achieved through bitmap, combination number, cell index, or resource index, resource set / group index. Additionally, L or L... max The value of can be at least one of {1,2,3,4,5,6,7,8}. The value of K can be at least one of {1,2,3,4}.

[0347] In addition, whether the CSI jointly reported in the above methods includes the current serving cell can be determined based on network-side configuration or predefined methods. For example, if the network side is configured to include the serving cell, then the CSI jointly reported will include the serving cell's CSI. Alternatively, it can be based on the terminal's selection, or the network side can configure or predefine that the joint CSI can include the serving cell's CSI. Whether the serving cell's CSI is included in the specific report is determined by the terminal's selection.

[0348] Specifically, among the methods mentioned above, whether the jointly reported CSI includes the CSI of the current serving cell can be determined in the following ways: **Network-side configuration:** If the network side explicitly configures the jointly reported CSI to include the CSI of the serving cell, then the terminal will include the CSI information of the serving cell when jointly reporting. This method ensures that the CSI feedback of the serving cell is reported together when needed, facilitating network-side management and decision-making. **Predefined rules:** Predefined rules specify that the jointly reported CSI will by default include the CSI of the serving cell in specific scenarios. For example, in handover scenarios, predefined rules can require the reporting of the CSI of the serving cell, ensuring that the channel quality information of the serving cell is transmitted synchronously. **User equipment discretionary selection:** The network side can configure the jointly reported CSI to allow the inclusion of the serving cell's CSI, but whether it is actually included is decided by the user equipment. The user equipment can selectively report the serving cell's CSI based on factors such as the channel conditions and resource load of the current serving cell. This method gives the terminal more flexibility and optimizes resource utilization. The above methods can flexibly adapt to different network requirements, enabling the CSI information of the serving cell to be reported when necessary, while reducing unnecessary resource consumption.

[0349] Based on the methods described above, user equipment (UE) may report aperiodic CSI from multiple cells in a single reporting instance. This will increase the UE's measurement and calculation time for CSI, and may also increase the resource consumption of the CSI processing unit. To address these issues, at least one of the following solutions can be adopted:

[0350] Option 1: If L or L max If the value of L is no greater than 2 / 4 / 5 / 6 / 7, then the time taken for CSI calculation is Z2 and Z′2 multiplied by 2 respectively; if L or L max If the value of Z is greater than 2 / 4 / 5 / 6 / 7, then the time taken for CSI calculation is Z2 and Z′2 multiplied by 3 respectively.

[0351] Option 2: If L or L max If the value of L is no greater than 2 / 4 / 5 / 6 / 7, then the time taken for CSI calculation is Z2 and Z′2; if L or L max If the value of Z is greater than 2 / 4 / 5 / 6 / 7, then the time taken for CSI calculation is Z2 and Z′2 multiplied by 2 respectively.

[0352] Option 3: Assuming that the number of cells measured when the terminal jointly reports CSI is P, then the value of P is no greater than 2 / 4 / 5 / 6 / 7, and the time occupied by CSI calculation is Z2 and Z′2 multiplied by 2 respectively; if the value of P is greater than 2 / 4 / 5 / 6 / 7, then the time occupied by CSI calculation is Z2 and Z′2 multiplied by 3 respectively.

[0353] Option 4: Since the terminal needs to calculate the CSI of multiple cells, the calculation time of the CSI can be (Z2, Z′2) or (Z2+Z′2, 2Z′2), and the number of cells that need to report CSI does not exceed L, where L can take at least one value from {4, 5, 6, 7}.

[0354] Option 5: Since the terminal needs to calculate the CSI of multiple cells, the calculation time of CSI is related to the number of cells. When the number of cells does not exceed a certain value L, it can be (Z2+Z′2,2Z′2) or (2Z2,Z2+Z′2). When the number of cells is greater than L, it can be (Z2+2Z′2,3Z′2) or (3Z2,Z′2+2Z2). The value of L can be at least one of {2,4,5,6,7}.

[0355] Option 6: Since the terminal needs to calculate the CSI of multiple cells, the calculation time of the CSI can be (Z2, Z′2) or (Z2+Z′2, 2Z′2), and the number of cells that need to report CSI does not exceed L, where L can take at least one value from {2, 4, 5, 6, 7}.

[0356] Option 7: Since the terminal needs to calculate the CSI of multiple cells, the time occupied by CSI calculation is Z2 and Z′2 respectively plus and Or the time taken for CSI calculation is Z2 and Z′2 respectively plus and Or the time taken for CSI calculation is Z2 and Z′2 respectively plus and Alternatively, the L mentioned above can also be replaced with L. max .

[0357] Option 8: Assuming that the number of cells measured when the terminal jointly reports CSI is P, then the time occupied by CSI calculation is Z2 and Z′2 respectively plus... and Or the time taken for CSI calculation is Z2 and Z′2 respectively plus and Or the time taken for CSI calculation is Z2 and Z′2 respectively plus and

[0358] Scenario 2: Each cell that selects to provide feedback on CSI must provide at least one CSI.

[0359] Based on the above assumptions, when a user equipment performs aperiodic CSI feedback, at least one CSI feedback is triggered by a trigger instance, and at least one CSI feedback is reported within a reporting instance. This means that the user equipment performs CSI measurements and provides feedback under specific triggering conditions, ensuring that each feedback data is completed within a predefined reporting time. This method can effectively reduce reporting overhead and improve the efficiency and accuracy of CSI feedback. Each cell is configured with S CSI-RS resources or a CSI-RS resource set containing S CSI-RS resources, where S≥1. The specific cells whose CSIs the terminal side feeds back in the above scenario can be determined based on the network side configuration, and the specific configuration method is the same as the three methods in Scenario 1. However, in Scenario 2, the network side may also configure how many beams' corresponding CSIs the terminal reports for each cell. The configuration method can adopt at least one of the following methods:

[0360] Method A: The network side is configured to report the number M of CSIs under a single cell. The specific M beams corresponding to the CSIs under the cell to be reported are determined by the terminal based on the network side configuration.

[0361] Method B: The network side is configured with a maximum number M of CSIs reported per cell. max The specific CSI corresponding to the M beams in the cell reported based on the network-side configuration is determined by the terminal, where M ≤ M max .

[0362] Based on methods A and B, user equipment may report multiple aperiodic CSIs from multiple cells in a single reporting instance. This will correspondingly increase the time for terminal CSI measurement and calculation, and may also increase the user equipment's occupancy of CSI calculation units. The time Z2 and Z′2 occupied by the user equipment for CSI calculation can reuse the solution from scenario one, simply by replacing L with LM or LM'. max L max Replace with L max M or L max M max Or replace P with PS.

[0363] Based on the possible CSI calculation time requirements in the two scenarios mentioned above, the CSI processing unit can be occupied using at least one of the following schemes:

[0364] Option 1: Where S lThis indicates the number of CSI-RS resources corresponding to the reported l-th cell.

[0365] Option 2: O CPU =L or O CPU =L max .

[0366] Option 3: Where S p This represents the number of CSI-RS resources corresponding to the p-th cell.

[0367] Option 4: Where S p X represents the number of CSI-RS resources corresponding to the p-th cell, where X ∈ at least one of {1 / 8, 1 / 4, 1 / 3, 1 / 2, 1}.

[0368] Option 5: O CPU =XP, where X∈ at least one of {1 / 8,1 / 4,1 / 3,1 / 2,1,1.5,2,3,4}.

[0369] Option Six: O CPU =LM,O CPU =LM max O CPU =L max M, or O CPU =L max M max .

[0370] Option 7: O CPU =XL max M max , where X∈ at least one of {1 / 8,1 / 4,1 / 3,1 / 2,1}.

[0371] Option 8: O CPU =XL max M, where X ∈ at least one of {1 / 8, 1 / 4, 1 / 3, 1 / 2, 1}.

[0372] Option Nine: O CPU =XLM max , where X∈ at least one of {1 / 8,1 / 4,1 / 3,1 / 2,1}.

[0373] The aforementioned CSI processing unit occupancy scheme can be combined with any CSI calculation time scenario. By combining the CSI calculation time and CSI processing unit specifications, it can be ensured that user equipment has sufficient capabilities to perform CSI measurement, calculation, and reporting, thereby avoiding the inability to complete the network-side's expected CSI measurement, calculation, and reporting due to user equipment capability limitations. Furthermore, in the above scheme, the beam under each cell corresponds to the CSI-RS measurement resources, ensuring measurement accuracy and effective resource utilization.

[0374] The tenth embodiment proposes an optimization scheme for CSI calculation time under LTM (L1 / L2 triggered mobility). The introduction of LTM improves handover latency and downtime, especially in Rel-18. The main limitation of existing LTM operations is that they only support mobility management within the same gNB cell, but if handovers across different gNBs are possible, the advantages of LTM will be more widely applied. Furthermore, when a user equipment (UE) hands over to a new cell, it typically requires a lower MCS level for communication, waiting for CSI feedback to obtain precoding information of the target cell. To maintain a high transmission rate, CSI measurements can be completed in advance during rapid CSI feedback before or after handover. Based on the LTM scenario, three methods are proposed for CSI measurement and reporting, performing CSI-RS measurement and reporting at different trigger times. When the UE needs to simultaneously measure the CSI of candidate and serving cells, both CSI measurement and calculation times increase. This embodiment provides two scenarios to address different situations: the first scenario assumes at most one CSI feedback per cell, while the second scenario allows at least one CSI feedback per cell. The feedback and configuration methods for CSI in various scenarios can be flexibly determined through network-side configuration. In multi-cell joint reporting scenarios, CSI calculation time can be calculated using different multiples or weighted formulas to ensure a balance between resource utilization and measurement accuracy. Furthermore, the occupancy of CSI processing units is calculated using multiple schemes to ensure that user equipment has sufficient processing capacity under different reporting demands. These schemes, combined with the optimization of CSI calculation time and resource configuration, guarantee the efficiency of multi-cell joint reporting and ensure connection stability and communication quality in LTM scenarios.

[0375] Eleventh Implementation: Mapping Rules for Multiple CSI Reports under LTM.

[0376] In some embodiments of this application, based on the tenth embodiment, a user equipment may report multiple CSIs from various cells, each with a reporting volume of 'cri-RI-PMI-CQI' and a codebook type of 'typeI-SinglePanel' or 'typeI-MultiPanel'. Each cell may report multiple CSIs, and each CSI is divided into part 1 and part 2. The information in part 2 can be further subdivided into Group 0, Group 1, and Group 2. Considering scenarios where user equipment reporting resources are limited or conflicting, it is necessary to prioritize CSI reporting. Therefore, for the UCI omitted content reported in CSI part 2, except for priority 0 (content corresponding to Group 0), the mapping rules for other content in the UCI can adopt at least one of the following schemes:

[0377] In other words, when user equipment reporting resources are limited or resource conflicts exist, the content reported by CSI can be prioritized, especially for information groups (Group 0, Group 1, and Group 2) in CSI Part 2. To ensure the transmission of critical information, the UCI omission rules in CSI Part 2 can prioritize retaining the highest priority content, i.e., the content in Group 0 (priority 0), while the mapping rules for other content can be based on at least one of the following schemes:

[0378] Option 1: Figure 4Q illustrates the mapping rules for multiple CSI reporting content under LTM in this application embodiment. Assuming the user equipment reports CSIs corresponding to L cells, with each cell corresponding to one CSI, then in CSI part2, excluding Group 0, the mapping order of the UCI packets corresponding to the L CSIs and the L consecutive priorities from high to low are as follows: PMI information corresponding to even-numbered subbands associated with the 1st CSI measurement resource in Group 1; PMI information corresponding to odd-numbered subbands associated with the 1st CSI measurement resource in Group 2; PMI information corresponding to even-numbered subbands associated with the 1st CSI measurement resource in Group 1; PMI information corresponding to odd-numbered subbands associated with the 1st CSI measurement resource in Group 2; PMI information corresponding to even-numbered subbands associated with the Lth CSI measurement resource in Group 1; PMI information corresponding to odd-numbered subbands associated with the Lth CSI measurement resource in Group 2.

[0379] Regarding the sorting of cell indexes for the L cells, the sorting can be done sequentially from low to high or from high to low, adapting flexibly to different reporting requirements. Meanwhile, for the UCI fields in broadband Group 0, even-numbered sub-band Group 1, and odd-numbered sub-band Group 2, the existing standard design can be fully reused, meaning the existing Type-I codebook design can be directly adopted. This approach not only maintains system consistency but also reduces design and implementation complexity, ensuring full utilization of existing encoding schemes during the reporting process and improving reporting efficiency and accuracy.

[0380] The mapping order of the UCI fields related to each broadband PMI in Group0 can also be mapped according to the index of L CSIs. Figure 4R illustrates the mapping rules of the multi-CSI reporting content under LTM in this embodiment of the application, as follows: PMI information corresponding to the broadband associated with the first CSI measurement resource in Group0; PMI information corresponding to the broadband associated with the lth CSI measurement resource in Group0; PMI information corresponding to the broadband associated with the Lth CSI measurement resource in Group0.

[0381] Furthermore, if the Type-I codebook only supports Broadband PMI, then the jointly reported CSI will only include UCI-related fields from Group 0. Meanwhile, if the L cells include the serving cell's CSI, according to the mapping rules described above, the serving cell's CSI will either be mapped to the first cell or the Lth cell. This arrangement helps simplify the CSI reporting logic and ensures that the serving cell's CSI can be reported effectively according to predetermined rules.

[0382] Option 2: Figure 4S illustrates the mapping rules for multiple CSI reporting content under LTM in this embodiment of the application. Assume the terminal reports L cells corresponding to M1, M2, ..., M... L For each beam corresponding to a CSI, then in CSI part2, multiple CSIs excluding Group0, The mapping order of the UCI packets corresponding to each CSI and The following are consecutive priority levels from highest to lowest: PMI information corresponding to even-numbered subbands associated with the 1st CSI measurement resource in Group 1; PMI information corresponding to odd-numbered subbands associated with the 1st CSI measurement resource in Group 2; PMI information corresponding to even-numbered subbands associated with the M1th CSI measurement resource in Group 1; PMI information corresponding to odd-numbered subbands associated with the M1th ... PMI information corresponding to the even-numbered sub-bands associated with each CSI measurement resource; Group 2 and the... PMI information corresponding to the odd-numbered subbands associated with each CSI measurement resource.

[0383] The cell indexes corresponding to the L cells can be arranged in ascending order or descending order; and for the UCI fields in broadband Group0, even subband group1 and odd subband group2, the existing standard design can be completely reused, that is, the design of the existing Type-I codebook can be reused.

[0384] The mapping order of the UCI fields related to each broadband PMI in Group0 can also be mapped according to the index of L CSIs. Figure 4T illustrates the mapping rules of the multi-CSI reporting content under LTM in this embodiment of the application, as follows: PMI information corresponding to the broadband associated with the first CSI measurement resource in Group0; PMI information corresponding to the broadband associated with the M1st CSI measurement resource in Group0; PMI information corresponding to the broadband associated with the M1st CSI measurement resource in Group0; PMI information associated with ... PMI information associated with the bandwidth of each CSI measurement resource.

[0385] Furthermore, if only wideband PMI is supported for Type-I codebooks, then the aforementioned joint CSI reporting will only include UCI-related fields from Group 0.

[0386] In addition, if the above L cells contain the CSI corresponding to the serving cell, then according to the above mapping rules, the serving cell will either correspond to the first cell or the Lth cell.

[0387] The index of CSI measurement resources under this scheme is: Furthermore, under this scheme, there may be M1 = M2 = ... = M L And M l The value of can be at least one of {1,2,3,4}.

[0388] Option 3: Figure 4U illustrates the mapping rules for multiple CSI reporting content under LTM in this embodiment of the application. Assume the terminal reports L cells corresponding to M1, M2, ..., M... L If the network side is configured to report the CSI corresponding to each beam, and as described in the tenth embodiment, the CSI corresponding to K cells must be reported, then in CSI part2, multiple CSIs excluding Group0... The mapping order of the UCI packets corresponding to each CSI and The following is a sequence of PMI information in descending order of priority: Group 1: PMI information corresponding to even-numbered subbands associated with the 1st CSI measurement resource; Group 2: PMI information corresponding to odd-numbered subbands associated with the 1st CSI measurement resource; ... Group 1: PMI information corresponding to even-numbered subbands associated with the M1th CSI measurement resource; Group 2: PMI information corresponding to odd-numbered subbands associated with the M1th CSI measurement resource; ... Group 1: PMI information corresponding to even ... PMI information corresponding to the even-numbered sub-bands associated with each CSI measurement resource; Group 2 and the... PMI information corresponding to the odd-numbered subbands associated with each CSI measurement resource; ...Group 1 and the... PMI information corresponding to the even-numbered sub-bands associated with each CSI measurement resource; Group 2 and the... PMI information corresponding to the odd-numbered subbands associated with each CSI measurement resource.

[0389] The cell indexes corresponding to the L cells can be arranged in ascending order or descending order; and for the UCI fields in broadband Group0, even subband group1 and odd subband group2, the existing standard design can be completely reused, that is, the design of the existing Type-I codebook can be reused.

[0390] The mapping order of the UCI fields related to each broadband PMI in Group0 can also be mapped according to the index of L CSIs. Figure 4V illustrates the mapping rules of the multi-CSI reporting content under LTM in this embodiment of the application, as follows: PMI information corresponding to the broadband associated with the first CSI measurement resource in Group0; ... PMI information corresponding to the broadband associated with the M1st CSI measurement resource in Group0; ... PMI information related to the broadband associated with the M1st CSI measurement resource in Group0; ... PMI information ... K PMI information for the broadband associated with each CSI measurement resource; ... PMI information for the bandwidth corresponding to the CSI measurement resource in Group 0; ... PMI information associated with the bandwidth of each CSI measurement resource.

[0391] Furthermore, if only wideband PMI is supported for Type-I codebooks, then the aforementioned joint CSI reporting will only include UCI-related fields from Group 0.

[0392] In addition, if the above L cells contain the CSI corresponding to the serving cell, then according to the above mapping rules, the serving cell will either correspond to the first cell or the Lth cell.

[0393] The index of CSI measurement resources under this scheme is: Furthermore, under this scheme, there may be M1 = M2 = ... = M L And M l The value of can be at least one of {1,2,3,4}.

[0394] The eleventh embodiment details the mapping rules for multiple CSI reporting content in LTM scenarios. Based on the tenth embodiment, user equipment may report CSIs from multiple cells. Each CSI is divided into part 1 and part 2, where part 2 contains three information groups: Group 0, Group 1, and Group 2. To address resource constraints or resource conflicts and ensure priority transmission of critical information, a priority division rule for CSI reporting content is proposed, with particular priority given to reporting Group 0 content (priority 0). Furthermore, for the omitted UCI content in CSI part 2, three mapping schemes are provided: Scheme 1: The terminal reports CSIs from L cells. The broadband-related UCI fields in Group 0 are mapped according to the L CSI indices; the content of Group 1 and Group 2 is sorted from high to low priority, and the even and odd subband PMI information associated with the 1st to Lth CSI resources is mapped sequentially. The L cell indices can be arranged sequentially, and the broadband and subband UCI fields reuse the existing Type-I codebook design. Scheme 2: The terminal reports M beam CSIs from L cells. The broadband PMI information in Group 0 is mapped according to the CSI index. The PMI information for even and odd sub-bands in Groups 1 and 2 is mapped in beam order, arranged from highest to lowest priority, supporting existing codebook designs. The serving cell can be mapped to the first or Lth cell to simplify the logic. Option 3: If the network side requires CSI reporting for K cells, then the broadband PMI for Group 0 is mapped in cell order, and the content of Groups 1 and 2 is arranged by priority, mapping the PMI for even and odd sub-bands sequentially. The serving cell can be mapped to the first or Lth cell according to the above rules.

[0395] Twelfth Implementation: CSI Reporting Discarding Rules under LTM

[0396] In some embodiments of this application, based on the CSI enhancements in the current 3GPP TS38.214 specification for Rel-17 / 18, the user equipment (UE) only reports channel state information when it receives at least one CSI-RS transmission opportunity in each CSI-RS resource set used for channel measurement, and at least one CSI-RS and / or CSI-IM resource transmission opportunity in each CSI-RS and / or CSI-IM resource set used for interference measurement in the corresponding resource set (these transmission opportunities are no later than the CSI reference resource and within the same DRX active time). This mechanism ensures that the UE can perform CSI measurements and reports under appropriate resource and timing conditions, thereby improving the accuracy and reliability of measurement and reporting. (When DRX is configured, the CSI report is only reported after this condition is met; otherwise, the report is discarded.) Specifically, for example, when Discontinuous Reception (DRX) mode is configured, the User Equipment (UE) will only perform a CSI report if the above conditions are met: that is, after receiving at least one CSI-RS transmission opportunity in each CSI-RS resource set used for channel measurements, and at least one transmission opportunity in each CSI-RS and / or CSI-IM resource in the corresponding resource set used for interference measurements. If this condition is not met, the CSI report will be discarded. This mechanism ensures that CSI reporting is only performed based on sufficient measurements, thereby guaranteeing the validity and accuracy of measurements and reporting in DRX mode.

[0397] For CSI measurement and reporting under LTM (L1 / L2 triggered mobility), there are currently three alternative schemes: Option 1: CSI-RS measurement and CSI reporting operations are completed before receiving the LTM Cell Handover Command (CSC) MAC CE. The report is first sent to the serving cell, and then transferred from the serving cell to the candidate or target cell. Option 2: CSI-RS measurement can begin before receiving the LTM CSC MAC CE, but CSI reporting operations are performed after receiving the LTM CSC MAC CE, and the report is sent directly to the target cell. This method allows CSI measurement to start before handover, but the report is only sent to the target cell after handover confirmation. Option 3: Both CSI-RS measurement and CSI reporting operations are performed after receiving the LTM CSC MAC CE, and the report is sent directly to the target cell. This method is suitable for scenarios requiring faster CSI feedback to quickly transmit measurement data after handover. These three schemes provide different timing options for CSI measurement and reporting to address different network requirements and handover scenarios, ensuring flexible and efficient CSI reporting during handover.

[0398] For the scenario described above where the User Equipment (UE) needs to measure the CSI of candidate cells and report it to the serving cell, the current standard does not support this approach and therefore does not provide rules for discarding candidate cell CSI reports. Furthermore, when the CSIs of candidate cells and the serving cell are jointly reported in a single reporting instance, the existing standard also does not support discarding such jointly reported CSIs. To address this issue, at least one of the following solutions can be considered:

[0399] Option 1: Assuming all candidate cells' CSI-RS and / or CSI-IM resources are configured in a single CSI-RS and / or CSI-IM resource set, based on this assumption, the following discard rules apply to candidate cell CSI reports: For an LTM-CSI-ReportConfig configuration where the codebookType is set to 'Type-I' or 'Type-II' and / or the higher-layer parameter reportQuantity contains at least 'RI', the following discard rules apply to CSI reports (re)configuration, serving cell activation, serving cell BWP change, serving cell SP-CSI activation, candidate cell activation, and candidate cell... After a district BWP change or candidate cell SP-CSI activation, the UE will only report a CSI report after receiving at least one CSI-RS transmission opportunity from the CSI-RS resource set corresponding to the serving and / or candidate cell or the candidate cell requiring CSI reporting, for channel measurement, and before the CSI reference resource and within the same DRX active time of the serving and / or candidate cell (if DRX is configured), and after receiving at least one transmission opportunity from the CSI-RS and / or CSI-IM resource set of the serving and / or candidate cell for interference measurement. Otherwise, the report will be discarded. This rule helps ensure that CSI reporting only occurs when certain conditions are met, thereby improving the accuracy of measurement and reporting.

[0400] Option 2: Assuming that each candidate cell's CSI-RS and / or CSI-IM resource configuration corresponds to a CSI-RS and / or CSI-IM resource set, based on the above assumptions, the following discard rules apply to candidate cell CSI reports: For an LTM-CSI-ReportConfig configuration where the codebookType is set to 'Type-I' or 'Type-II' and / or the higher-layer parameter reportQuantity contains at least 'RI', the following discard rules apply: CSI report (re)configuration, serving cell activation, serving cell BWP change, serving cell SP-CSI activation, candidate cell activation, candidate cell B... After a WP change or candidate cell SP-CSI activation, the UE will only report a CSI report after receiving at least one CSI-RS transmission opportunity for channel measurement from the CSI-RS resource set corresponding to the serving and / or each candidate cell or each candidate cell requiring CSI reporting, and before the CSI reference resource and within the same DRX active time of the serving and / or candidate cell (if DRX is configured), and after receiving at least one transmission opportunity from the CSI-RS and / or CSI-IM resource set of the serving and / or candidate cell for interference measurement. Otherwise, the report will be discarded. This rule helps ensure that CSI reporting is performed under specific conditions, further improving the accuracy and reliability of the reporting.

[0401] Whether the CSI of the serving cell is reported in the above scheme depends on the network-side configuration, and the reporting of the CSI of the serving cell and the CSI of the candidate cell can be triggered jointly or independently. When jointly triggered, they can be reported in a single reporting instance, and the serving cell and the candidate cell can use different or the same codebook type. For example, the serving cell can use a Type-II codebook, and the candidate cell can use a Type-I codebook.

[0402] In the above scheme, whether to report the serving cell's CSI depends on the specific network configuration. The reporting of the serving cell's CSI and the candidate cell's CSI can be achieved through joint triggering or independent triggering. The network can configure joint triggering as needed, allowing the serving cell and candidate cell's CSIs to be reported in the same reporting instance; alternatively, it can be configured for independent triggering, reporting the serving cell's and candidate cell's CSIs separately to meet different network requirements and resource management needs. This configuration flexibility allows the reporting method to adapt to various network scenarios, improving the efficiency and accuracy of CSI reporting. In the case of joint triggering, the serving cell...

Claims

1. A wireless communication method, performed on a user equipment, comprising: Receive measurement signals sent by network-side devices; Based on the measurement signal, measurements are performed to obtain time offset compensation information for multiple access points and channel state information for coherent joint transmission of the multiple access points; In the same reporting instance, some or all of the time offset compensation information and some or all of the channel state information are reported to the network-side device, and joint reporting is performed according to the mapping rules of each part of the information element. The each part of the information element refers to the part or all of the time offset compensation information and some or all of the channel state information being reported being divided and mapped to different reporting parts in the reporting instance.

2. The wireless communication method according to claim 1, wherein, The channel state information includes a first part of information and a second part of information. The time offset compensation information is mapped to the first part of the channel state information, and the mapping order is that the time offset compensation information is located before or after the first part of the channel state information.

3. The wireless communication method according to claim 2, wherein, When the time offset compensation information is mapped to the first part of the channel state information, the time offset compensation information is reported or discarded together with the first part of the channel state information.

4. The wireless communication method according to claim 1, wherein, The channel state information includes a first part of information and a second part of information. The time offset compensation information is mapped to the second part of the channel state information, and the mapping order is that the time offset compensation information is located before or after the second part of the channel state information.

5. The wireless communication method according to claim 1, wherein, The channel state information includes a first part of information and a second part of information. The time offset compensation information together with the first group, the second group or the third group in the second part of the channel state information forms an information group. The mapping order is that the time offset compensation information is located before or after the first group, the second group or the third group in the second part of the channel state information.

6. The wireless communication method according to claim 5, wherein, When the time offset compensation information is mapped to the second part of the channel state information, the time offset compensation information is reported or discarded together with the first group, the second group, or the third group in the second part of the channel state information.

7. The wireless communication method according to claim 1, wherein, The channel state information includes a first part of information and a second part of information. The first part of the time offset compensation information is located in the first part of the channel state information, and the second part of the time offset compensation information is located in the second part of the channel state information. The mapping rule is as follows: the reference resource or resource set index of the time offset compensation information is located in the first part of the channel state information, and the time offset compensation value and the indication information of whether the time offset compensation value is out of range are located in the second part of the channel state information.

8. The wireless communication method according to claim 1, wherein, The channel state information includes a first part of information and a second part of information. The first part of the time offset compensation information is located in the first part of the channel state information, and the second part of the time offset compensation information is located in the second part of the channel state information. The mapping rule is as follows: the reference resource or resource set index of the time offset compensation information and the indication information of whether the time offset compensation value is out of range are located in the first part of the channel state information, and the time offset compensation value of the time offset compensation information is located in the second part of the channel state information.

9. The wireless communication method according to claim 1, wherein, The channel state information includes a first part of information and a second part of information, and the time offset compensation information is reported independently of the first part of information and the second part of information of the channel state information.

10. The wireless communication method according to claim 1, wherein, The joint reporting of the time offset compensation information and the channel state information follows a priority rule.

11. The wireless communication method according to claim 10, wherein, The priority rule is that the reporting priority of the time offset compensation information is higher than the reporting priority of the first part of the channel state information, and the reporting priority of the first part of the channel state information is higher than the reporting priority of the second part of the channel state information.

12. The wireless communication method according to claim 10, wherein, The priority rule is that the reporting priority of the first part of the channel state information is higher than the reporting priority of the time offset compensation information, and the reporting priority of the time offset compensation information is higher than the reporting priority of the second part of the channel state information.

13. The wireless communication method according to claim 10, wherein, The priority rule is that the reporting priority of the first part of the channel state information is higher than the reporting priority of the second part of the channel state information, and the reporting priority of the second part of the channel state information is higher than the reporting priority of the time offset compensation information.

14. The wireless communication method according to claim 1, wherein, Access points associated with resources or resource sets corresponding to predefined reference resource or resource set indexes participate in the coherent joint transmission, and the channel state information indicates whether access points associated with non-reference resources or resource sets participate in the coherent joint transmission.

15. The wireless communication method according to claim 1, wherein, If the time offset compensation information of one or more resources or resource sets relative to a reference resource exceeds an indicated or predefined range, then the access point associated with that resource or resource set will not participate in the coherent joint transmission. The channel state information indicates whether the access point associated with a resource or resource set whose time offset compensation value does not exceed the range participates in the coherent cooperative transmission.

16. The wireless communication method according to claim 1, wherein, When all access points corresponding to resources or resource sets participate in the coherent cooperative transmission, the user equipment only reports the reference resource or resource set index information and the time offset compensation value when reporting the time offset compensation information.

17. The wireless communication method according to claim 1, wherein, The channel state information includes selection indication information on whether the access point corresponding to the resource or resource set participates in the cooperation. The user equipment reports the time offset compensation value of the access point corresponding to the resource or resource set that participates in the coherent cooperative transmission, excluding the access point corresponding to the reference resource or resource set index, or reports the time offset compensation value of all access points except the access point corresponding to the reference resource or resource set index, as well as the reference resource or resource set index information.

18. A wireless communication method, performed on a user equipment, comprising: The system receives configuration information and measurement signals from multiple access points sent by network-side devices, performs measurements based on the measurement signals, and generates measurement results. Reporting the measurement results to the network-side device includes: reporting the measurement results of some or all access points to the network-side device in the same reporting instance; The user equipment receives access point update indication information sent by the network-side device, disconnects from some or all service access points according to the access point update indication information, and establishes connections with some or all candidate access points according to the access point update indication information.

19. The wireless communication method according to claim 18, wherein, Receiving the configuration information of the multiple access points sent by the network-side device includes: receiving the network-side device's indication of which service access points' beam measurement information needs to be reported.

20. The wireless communication method according to claim 18, wherein, Receiving the configuration information of the multiple access points sent by the network-side device includes: receiving the maximum number of access points that need to be reported and the maximum number of beam measurement results reported under each access point, as indicated by the network-side device.

21. The wireless communication method according to claim 18, wherein, The measurement results include one or more of the following: reference signal received power, signal-to-noise ratio, reference signal received quality, received signal strength indication, path loss, time delay deviation, phase deviation, or frequency deviation.

22. The wireless communication method according to claim 18 or 19, wherein, The measurement results include one or more of the following information: Beam measurement information for some or all service access points; Beam measurement information for some or all candidate access points; Time offset compensation information for some or all access points; Beam index information corresponding to the beam measurement information of some or all of the service access points; or Beam index information corresponding to the beam measurement information of some or all of the candidate access points.

23. The wireless communication method according to claim 18, wherein, The beam index information corresponding to the beam measurement information of some or all of the access points reported by the user equipment adopts a two-level indication method: first, it indicates the access point to which the beam belongs, and then it indicates the beam under the access point.

24. The wireless communication method according to claim 18, wherein, The access point update indication information includes one or more of the following: Access point updates status indication information; Configuration identifier information corresponding to an access point or a resource or resource set under an access point; Information on the number of service access points or candidate access points; The newly introduced access point corresponds to the transmission configuration indication status information.

25. A wireless communication method, performed on a network-side device, comprising: Send measurement signals to user equipment; Receive time offset compensation information of multiple access points fed back by the user equipment based on the measurement signal and channel state information of the coherent joint transmission of the multiple access points; In the same reporting instance, some or all of the time offset compensation information and some or all of the channel state information reported by the user equipment are received, and the jointly reported information is parsed according to the mapping rules of each part of the information element. The each part of the information element refers to the part or all of the reported time offset compensation information and some or all of the channel state information being divided and mapped to different reporting parts in the reporting instance.

26. The wireless communication method according to claim 25, wherein, The channel state information includes a first part of information and a second part of information. The time offset compensation information is mapped to the first part of the channel state information, and the mapping order is that the time offset compensation information is located before or after the first part of the channel state information.

27. The wireless communication method according to claim 26, wherein, When the time offset compensation information is mapped to the first part of the channel state information, the time offset compensation information is reported or discarded together with the first part of the channel state information.

28. The wireless communication method according to claim 25, wherein, The channel state information includes a first part of information and a second part of information. The time offset compensation information is mapped to the second part of the channel state information, and the mapping order is that the time offset compensation information is located before or after the second part of the channel state information.

29. The wireless communication method according to claim 25, wherein, The channel state information includes a first part of information and a second part of information. The time offset compensation information together with the first group, the second group or the third group in the second part of the channel state information forms an information group. The mapping order is that the time offset compensation information is located before or after the first group, the second group or the third group in the second part of the channel state information.

30. The wireless communication method according to claim 29, wherein, When the time offset compensation information is mapped to the second part of the channel state information, the time offset compensation information is reported or discarded together with the first group, the second group, or the third group in the second part of the channel state information.

31. The wireless communication method according to claim 25, wherein, The channel state information includes a first part of information and a second part of information. The first part of the time offset compensation information is located in the first part of the channel state information, and the second part of the time offset compensation information is located in the second part of the channel state information. The mapping rule is as follows: the reference resource or resource set index of the time offset compensation information is located in the first part of the channel state information, and the time offset compensation value and the indication information of whether the time offset compensation value is out of range are located in the second part of the channel state information.

32. The wireless communication method according to claim 25, wherein, The channel state information includes a first part of information and a second part of information. The first part of the time offset compensation information is located in the first part of the channel state information, and the second part of the time offset compensation information is located in the second part of the channel state information. The mapping rule is as follows: the reference resource or resource set index of the time offset compensation information and the indication information of whether the time offset compensation value is out of range are located in the first part of the channel state information, and the time offset compensation value of the time offset compensation information is located in the second part of the channel state information.

33. The wireless communication method according to claim 25, wherein, The channel state information includes a first part of information and a second part of information, and the time offset compensation information is reported independently of the first part of information and the second part of information of the channel state information.

34. The wireless communication method according to claim 25, wherein, The joint reporting of the time offset compensation information and the channel state information follows a priority rule.

35. The wireless communication method according to claim 34, wherein, The priority rule is that the reporting priority of the time offset compensation information is higher than the reporting priority of the first part of the channel state information, and the reporting priority of the first part of the channel state information is higher than the reporting priority of the second part of the channel state information.

36. The wireless communication method according to claim 34, wherein, The priority rule is that the reporting priority of the first part of the channel state information is higher than the reporting priority of the time offset compensation information, and the reporting priority of the time offset compensation information is higher than the reporting priority of the second part of the channel state information.

37. The wireless communication method according to claim 34, wherein, The priority rule is that the reporting priority of the first part of the channel state information is higher than the reporting priority of the second part of the channel state information, and the reporting priority of the second part of the channel state information is higher than the reporting priority of the time offset compensation information.

38. The wireless communication method according to claim 25, wherein, Access points associated with resources or resource sets corresponding to predefined reference resource or resource set indexes participate in the coherent joint transmission, and the channel state information indicates whether access points associated with non-reference resources or resource sets participate in the coherent joint transmission.

39. The wireless communication method according to claim 25, wherein, If the time offset compensation information of one or more resources or resource sets relative to a reference resource exceeds an indicated or predefined range, then the access point associated with that resource or resource set will not participate in the coherent joint transmission. The channel state information indicates whether the access point associated with a resource or resource set whose time offset compensation value does not exceed the range participates in the coherent cooperative transmission.

40. The wireless communication method according to claim 25, wherein, When all access points corresponding to resources or resource sets participate in the coherent cooperative transmission, the network-side device only receives the reference resource or resource set index information and the time offset compensation value when receiving the time offset compensation information.

41. The wireless communication method according to claim 25, wherein, The channel state information includes selection indication information on whether the access point corresponding to the resource or resource set participates in the cooperation. The network-side device receives the time offset compensation value of the access point corresponding to the resource or resource set that participates in the coherent cooperative transmission, except for the access point corresponding to the reference resource or resource set index, or receives the time offset compensation value of all access points except for the access point corresponding to the reference resource or resource set index, as well as the reference resource or resource set index information.

42. A wireless communication method, performed on a network-side device, comprising: Send configuration information and measurement signals of multiple access points to user equipment; Receiving measurement results reported by the user equipment includes: receiving measurement results of some or all access points reported by the user equipment in the same reporting instance; Send access point update indication information to the user equipment to instruct the user equipment to disconnect from some or all service access points and establish connections with some or all candidate access points.

43. The wireless communication method according to claim 42, wherein, Sending the configuration information of the multiple access points to the user equipment includes instructing the user equipment which service access points' beam measurement information needs to be reported.

44. The wireless communication method according to claim 42, wherein, Sending the configuration information of the multiple access points to the user equipment includes: indicating the maximum number of access points that the user equipment needs to report and the maximum number of beam measurement results to be reported under each access point.

45. The wireless communication method according to claim 42, wherein, The measurement results include one or more of the following: reference signal received power, signal-to-noise ratio, reference signal received quality, received signal strength indication, path loss, time delay deviation, phase deviation, or frequency deviation.

46. ​​The wireless communication method according to claim 42 or 43, wherein, The measurement results include one or more of the following information: Beam measurement information for some or all service access points; Beam measurement information for some or all candidate access points; Time offset compensation information for some or all access points; Beam index information corresponding to the beam measurement information of some or all of the service access points; or Beam index information corresponding to the beam measurement information of some or all of the candidate access points.

47. The wireless communication method according to claim 42, wherein, The network-side device receives beam index information corresponding to the beam measurement information of some or all access points reported by the user equipment. The beam index information is reported in a two-level indication manner, first indicating the access point to which the beam belongs, and then indicating the beam under the access point.

48. The wireless communication method according to claim 42, wherein, The access point update indication information includes one or more of the following: Access point updates status indication information; Configuration identifier information corresponding to an access point or a resource or resource set under an access point; Information on the number of service access points or candidate access points; The newly introduced access point corresponds to the transmission configuration indication status information.

49. A wireless communication device, comprising: A processor and a memory, the memory being used to store a computer program, the processor being used to invoke and run the computer program stored in the memory to perform the wireless communication method as described in any one of claims 1 to 48.

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