Methods of reporting event-trigged measurement, reporting event-trigged measurement report, and relevant devices
Event-triggered measurement reporting for LTM in wireless communication systems addresses inefficiencies in current methods by configuring trigger events for UE to report physical reference signal measurements, enhancing mobility decisions and reducing resource waste.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2026-04-02
AI Technical Summary
Current L1 measurement and report of SS/PBCH of candidate cells in wireless communication systems are inefficient, wasting uplink resources and not providing useful information for early synchronization and cell/beam selection.
Implement event-triggered measurement reporting by configuring LTM trigger events for UE to measure and report physical reference signal resources of serving and candidate cells when specific conditions are met, such as threshold crossings or relative power differences, enabling efficient and timely reporting of necessary measurement results.
This approach reduces latency and improves communication performance by allowing the system to make informed decisions on UE mobility, facilitating early synchronization and cell/beam selection.
Smart Images

Figure CN2025115566_02042026_PF_FP_ABST
Abstract
Description
METHODS OF REPORTING EVENT-TRIGGED MEASUREMENT, REPORTING EVENT-TRIGGED MEASUREMENT REPORT, AND RELEVANT DEVICES
[0001] BACKGROUND OF DISCLOSURE
[0002] 1. Field of the Disclosure
[0003] The present application relates to wireless communication technologies, and more particularly, to a method of reporting event-trigged measurement, a method of receiving event-trigged measurement report, and relevant devices.2. Description of the Related Art
[0004] In cellular wireless communication systems developed by the Third Generation Partnership Project (3GPP) , user equipment (UE) is connected by a wireless link to a radio access network (RAN) . The RAN includes a set of base stations (BSs) which provide wireless links to UEs located in cells covered by the base station and an interface to a core network (CN) which provides overall network control. The RAN and CN each conduct respective functions in relation to the overall network. The so-called 4G Long Term Evolution (LTE) system, namely, an Evolved Universal Mobile Telecommunication System Territorial Radio Access Network (E-UTRAN) has been developed for a mobile access network where one or more macro-cells are supported by a base station known as an eNodeB or eNB (evolved NodeB) . Evolved from LTE, the so-called 5G or new radio (NR) systems where one or more cells are supported by a base station known as a gNB. Envisioned to succeed the current 5G networks, the 6G cellular system is the forthcoming generation of wireless communication technology.
[0005] NR / 5G system supports the function of lower layer triggered mobility (LTM) , which can also be called L1 / L2 triggered mobility. To support LTM, the function of L1 measurement and reporting of candidate cells are also supported in NR system.
[0006] For that, the UE is first configured some candidate cells and SS / PBCH blocks per candidate cell. The configured SS / PBCH per candidate cell is for the UE to obtain synchronization and measurement corresponding L1-RSRPs. In other words, the UE can measure the L1-RSRP on the configured SS / PBCH blocks of each configured candidate cell. For L1 measurement and reporting of candidate cell, the UE is provided configuration by RRC parameter LTM-CSI-ReportConfigToAddModList for reporting L1-RSRP measurements. The configuration includes a number of candidate cells, a number of SS / PBCH blocks per candidate cell of those configured candidate cell. Each reporting configuration LTM-CSI-ReportConfig is associated with a LTM-CSI-ResourceConfig for L1-RSRP measurement. Each LTM CSI resource setting LTM-CSI-ResourceConfig contains a list of Z >=1 SS / PBCH block indices and a list of Z LTE candidate cell IDs referring to candidate cells associated with the SS / PBCH block indices. For each candidate cell configured here, the UE can determine the time domain behavior of a SS / PBCH block and the frequency domain behavior of the SS / PBCH from the higher layer parameter configuration of the SS / PBCH contained in the configuration of the corresponding candidate cell.
[0007] The UE can be configured to report the L1 measurement of K candidate cells and for each reported candidate cell, the UE can be requested to report L1 measurement of N SS / PBCH blocks. So, in each reporting instance, the UE would report L1-RSRP measurement of K*N SS / PBCH blocks. The UE can also be configured to include the measurement of serving cell. When that is configured, one of those reported K candidate cells shall be the serving cell.
[0008] The LTM L1 RSRP measurement reporting supports the following reporting behavior: aperiodic reporting on PUSCH, semi-persistent reporting on PUSCH, semi-persistent reporting on PUCCH and periodic reporting on PUCCH.
[0009] One drawback of current L1 measurement and report of SS / PBCH of candidate cells is that the reporting efficiency is very low. It might waste large amount of uplink resource in PUSCH or PUCCH but the L1 measurement reported by the UE is not useful for the system to make decision on early synchronization and / or cell / beam selection of candidate cells.SUMMARY
[0010] An object of the present application is to propose methods of reporting event-trigged measurement, receiving event-trigged measurement report, and relevant devices, which can solve issues in the relevant arts, implement an effective even-triggered measurement reporting, generate a report with necessary measurement results, reduce latency, provide a good communication performance, and / or provide high reliability.
[0011] In a first aspect, some embodiments of the present application provide a method of reporting event-trigged measurement, performed by a terminal device, including being indicated by a network device which LTM trigger event is configured for lower layer triggered mobility (LTM) ; measuring at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells according to the configured LTM trigger event; and reporting a corresponding measurement on the at least one of the serving cell and the candidate cells to the network device when the configured LTM trigger event happens.
[0012] In a second aspect, some embodiments of the present application provide a method of receiving event-trigged measurement report, performed by a network device, including indicating to a terminal device which LTM trigger event is configured for lower layer triggered mobility (LTM) ; and receiving a report from the terminal device when the configured LTM trigger event happens about a corresponding measurement on at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells measured according to the configured LTM trigger event.
[0013] In a third aspect, some embodiments of the present application provide a terminal device, including a memory; and a processor coupled to the memory, wherein the processor is configured to call and run program instructions stored in the memory, to execute the method described in the first aspect.
[0014] In a fourth aspect, some embodiments of the present application provide a network device, including a memory; and a processor coupled to the memory, wherein the processor is configured to call and run program instructions stored in the memory, to execute the method described in the second aspect.
[0015] In a fifth aspect, some embodiments of the present application provide a terminal device, including a first indication module, configured to be indicated by a network device which LTM trigger event is configured for lower layer triggered mobility (LTM) ; a measuring module, configured to measure at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells according to the configured LTM trigger event; and a reporting module, configured to report a corresponding measurement on the at least one of the serving cell and the candidate cells to the network device when the configured LTM trigger event happens.
[0016] In a sixth aspect, some embodiments of the present application provide a network device, including a second indication module, configured to indicate to a terminal device which LTM trigger event is configured for lower layer triggered mobility (LTM) ; and a receiving module, configured to receive a report from the terminal device when the configured LTM trigger event happens about a corresponding measurement on at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells measured according to the configured LTM trigger event.
[0017] In a seventh aspect, some embodiments of the present application provide a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to execute any of the above methods.
[0018] In an eighth aspect, some embodiments of the present application provide a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute any of the above methods.
[0019] In a ninth aspect, some embodiments of the present application provide a computer readable storage medium, in which a computer program is stored, causing a computer to execute any of the above methods.
[0020] In a tenth aspect, some embodiments of the present application provide a computer program product includes a computer program, and the computer program causes a computer to execute any of the above methods.
[0021] In an eleventh aspect, some embodiments of the present application provide a computer program that causes a computer to execute any of the above methods.BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to illustrate the embodiments of the present application or related art more clearly, the following figures will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present application, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.
[0023] FIG. 1 is a block diagram of a terminal device and a network device in a wireless communication system according to an embodiment of the present application.
[0024] FIG. 2 is a flowchart of a method of reporting event-trigged measurement by a terminal device according to an embodiment of the present application.
[0025] FIG. 3 is a flowchart of a method of receiving event-trigged measurement report by a network device according to an embodiment of the present application.
[0026] FIG. 4 is a block diagram of a terminal device according to an embodiment of the present application.
[0027] FIG. 5 is a block diagram of a network device according to an embodiment of the present application.
[0028] FIG. 6 is a block diagram of a system for wireless communication according to an embodiment of the present application.DETAILED DESCRIPTION OF EMBODIMENTS
[0029] Embodiments of the present application are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present application are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.
[0030] In this document, the symbol " / " should be interpreted to indicate "and / or. " A combination such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” or “A, B, and / or C” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any combination may contain one or more members of A, B, or C.
[0031] The following table includes some abbreviations or explanations that may be used in some embodiments of the present application:
[0032] The present application provides effective event-trigged measurement reporting for lower layer triggered mobility (LTM) . The reported measurement results can be utilized by the system to determine the candidate cell and beam for early synchronization and to determine the target cell / beam to trigger the LTM cell switch.
[0033] FIG. 1 illustrates that, in some embodiments, one or more terminal device (e.g., user equipments (UEs) ) 10 and one or more network devices (e.g., base stations or gNBs) 20 in a wireless communication system 30 according to an embodiment of the present application are provided. The wireless communication system 30 includes the one or more terminal devices 10 and one or more network devices 20. The one or more terminal devices 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The one or more network devices 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement proposed functions, procedures and / or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and / or receives a radio signal. When the wireless communication system 30 complies with the New Radio (NR) standard of the 3rd Generation Partnership Project (3GPP) , the next generation core network is a backend serving network system and may include an Access and Mobility Management Function (AMF) , User Plane Function (UPF) , and a Session Management Function (SMF) . In one aspect, the terminal device 10 can include almost any consumer electronic device or appliance that can connect to a radio access network and a core network for the releases of 3GPP and further, such as, but not limited to NR networks.
[0034] The processor 11 or 21 may include application-specific integrated circuit (ASIC) , other chipset, logic circuit and / or data processing device. The memory 12 or 22 may include read-only memory (ROM) , random access memory (RAM) , flash memory, memory card, storage medium and / or other storage device. The transceiver 13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21 in which case those can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.
[0035] In some embodiments, the processor 11 of the terminal device 10 is utilized to be indicated by a network device which LTM trigger event is configured for lower layer triggered mobility (LTM) , measure at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells according to the configured LTM trigger event, and report a corresponding measurement on the at least one of the serving cell and the candidate cells to the network device when the configured LTM trigger event happens. This facilitates implementing an effective even-triggered measurement reporting for LTM with necessary measurement results, thereby enabling the system to make correct decision on UE mobility effectively.
[0036] In some embodiments, the processor 21 of the network device 20 is utilized to indicate to a terminal device which LTM trigger event is configured for lower layer triggered mobility (LTM) and receive a report from the terminal device when the configured LTM trigger event happens about a corresponding measurement on at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells measured according to the configured LTM trigger event. This facilitates implementing an effective even-triggered measurement reporting for LTM with necessary measurement results, thereby enabling the system to make correct decision on UE mobility effectively.
[0037] FIG. 2 illustrates a method of reporting event-trigged measurement 100 by a terminal device according to an embodiment of the present application. In some embodiments, the method 100 includes the following.
[0038] In Block 102, the terminal device (e.g., a user equipment (UE) ) is indicated by a network device (e.g., a base station or gNB) which LTM trigger event is configured for lower layer triggered mobility (LTM) .
[0039] The terminal device can be configured to operate event-triggered measurement and report for LTM. For that, the terminal device can be provided with one LTM event indicator to indicate which LTM trigger event is configured by the network device.
[0040] In Block 104, the terminal device measures at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells according to the configured LTM trigger event.
[0041] Based on the configured LTM trigger event, the terminal device may measure the physical RS resource of the serving cell, the physical RS resources of the candidate cells, or both the physical RS resource of the serving cell and the physical RS resources of the candidate cells.
[0042] For example, the physical RS resource may include channel state information reference signal (CSI-RS) resource or synchronization signal (SS) / physical broadcast channel (PBCH) block. For example, the measurement on the serving cell may include Layer 1 reference signal received power (L1-RSRP) or Layer1 signal-to-interference-plus-noise ratio (L1-SINR) of the physical RS resource of the serving cell. For example, the measurement on the candidate cells may include L1-RSRP or L1-SINR of the physical RS resources of the candidate cells.
[0043] More specifically, the terminal device may measure the L1 measurement (e.g., L1-RSRP or L1-SINR) of the CSI-RS resource or SS / PBCH block of the serving cell. In another case, the terminal device may measure the L1 measurement (e.g., L1-RSRP or L1-SINR) of the CSI-RS resources and / or SS / PBCH blocks of the candidate cells. The measurement on which cell or cells (i.e., the serving cell, the candidate cells, or both the serving cell and the candidate cells) is performed based on the configured LTM trigger event.
[0044] In Block 106, the terminal device reports a corresponding measurement on the at least one of the serving cell and the candidate cells to the network device when the configured LTM trigger event happens.
[0045] For example, the corresponding measurement on the at least one of the serving cell and the candidate cells may be reported in a media access control control element (MAC CE) message.
[0046] In some embodiments, the configured LTM trigger event is a first LTM trigger event, and based on the first LTM trigger event, the physical RS resource of the serving cell is measured. The first LTM trigger event may occur when the measurement of the physical RS resource of the serving cell is less than a first threshold. More specifically, for the first LTM trigger event, the terminal device measures the CSI-RS resource or SS / PBCH block of the serving cell. The first LTM trigger event occurs when the L1 measurement of the CSI-RS or SSB of the serving cell is less than the first threshold.
[0047] In some embodiments, when the first LTM trigger event happens, one or more of the following information may be reported to the network device: the measurement of the physical RS resource of the serving cell; and a differential measurement of the physical RS resource of the serving cell with reference to the first threshold. When the first LTM trigger event happens, one or more of the following information may be further reported to the network device: one indicator to indicate that the first LTM trigger event happens.
[0048] In some embodiments, the configured LTM trigger event is a second LTM trigger event, and based on the second LTM trigger event, the physical RS resources of the candidate cells are measured. The second LTM trigger event may occur when the measurement of one or more of the physical RS resources of the candidate cells is greater than a second threshold. More specifically, for the second LTM trigger event, the terminal device measures the L1 measurement of the CSI-RS resources and / or SS / PBCH blocks of the candidate cells. The second LTM trigger event occurs when the L1 measurement of one or more of the CSI-RS resources or SSBs of the candidate cells is greater than the second threshold.
[0049] In some embodiments, when the second LTM trigger event happens, one or more of the following information may be reported to the network device: the measurement of each reported physical RS resource of the candidate cells; a differential measurement of each reported physical RS resource of the candidate cells with reference to the second threshold; and the measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance. when the second LTM trigger event happens, one or more of the following information may be further reported to the network device: one indicator to indicate that the second LTM trigger event happens; one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the second LTM trigger event; and a number of reported physical RS resources of candidate cells.
[0050] In some embodiments, the configured LTM trigger event is a third LTM trigger event, and based on the third LTM trigger event, the physical RS resource of the serving cell and the physical RS resources of the candidate cells are measured. The third LTM trigger event may occur when the measurement of one or more of the physical RS resources of the candidate cells is at least an offset value greater than the measurement of the physical RS resource of the serving cell. More specifically, for the third LTM trigger event, the terminal device measures the L1 measurement of the CSI-RS resources and / or SSBs of the candidate cells and the L1 measurement of the CSI-RS resource or SS / PBCH block of the serving cell. The third LTM trigger event occurs when the L1 measurement of one or more of the CSI-RS resources or SSBs of the candidate cells is at least the offset value greater than the L1 measurement of the CSI-RS resource or SSB of the serving cell.
[0051] In some embodiments, when the third LTM trigger event happens, one or more of the following information may be reported to the network device: the measurement of the physical RS resource of the serving cell; the measurement of each reported physical RS resource of the candidate cells; a differential measurement of each reported physical RS resource of the candidate cells with reference to a power measurement of the physical RS resource of the serving cell; the measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance; and a differential measurement of the physical RS resource of the serving cell with reference to the largest power measurement reported in the same reporting instance. When the third LTM trigger event happens, one or more of the following information may be further reported to the network device: one indicator to indicate that the third LTM trigger event happens; one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the third LTM trigger event; and a number of reported physical RS resources of candidate cells.
[0052] In some embodiments, the configured LTM trigger event is a fourth LTM trigger event, and based on the fourth LTM trigger event, the physical RS resource of the serving cell and the physical RS resources of the candidate cells are measured. The fourth LTM trigger event may occur when the measurement of one or more of the physical RS resources of the candidate cells is greater than a second threshold and the measurement of the physical RS resource of the serving cell is less than a first threshold. More specifically, for the fourth LTM trigger event, the terminal device measures the L1 measurement of the CSI-RS resource or SS / PBCH block of the serving cell and the L1 measurement of the CSI-RS resources and / or SSBs of the candidate cells. The fourth LTM trigger event occurs when the L1 measurement of one or more of the CSI-RS resources or SSBs of the candidate cells is greater than the second threshold and the L1 measurement of the CSI-RS resource or SSB of the serving cell is less than the first threshold.
[0053] In some embodiments, when the fourth LTM trigger event happens, one or more of the following information may be reported to the network device: the measurement of the physical RS resource of the serving cell; a differential measurement of the physical RS resource of the serving cell with reference to the first threshold; the measurement of each reported physical RS resource of the candidate cells; a differential measurement of each reported physical RS resource of the candidate cells with reference to the second threshold; a differential measurement of each reported physical RS resource of the candidate cells with reference to a power measurement of the physical RS resource of the serving cell; the measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance; and a differential measurement of the physical RS resource of the serving cell with reference to the largest power measurement reported in the same reporting instance. When the fourth LTM trigger event happens, one or more of the following information may be further reported to the network device: one indicator to indicate that the fourth LTM trigger event happens; one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the fourth LTM trigger event; and a number of reported physical RS resources of candidate cells.
[0054] With the proposed method 100 of reporting event-trigged measurement, the terminal device is indicated which LTM trigger event is configured for LTM, measures the physical RS resource of the serving cell and / or physical RS resources of the candidate cells according to the configured LTM trigger event, and reports a corresponding measurement to the network device when the configured LTM trigger event happens. The reported measurement results can be utilized by the system to determine the candidate cell and / or beam for early synchronization and can be used to determine the target cell / beam to trigger the LTM cell switch. This implements an effective even-triggered measurement reporting for LTM, and the terminal device can thus report necessary measurement results to the system for making correct decision on UE mobility.
[0055] FIG. 3 illustrates a method of receiving event-trigged measurement report 200 by a network device according to an embodiment of the present application. In some embodiments, the method 200 includes the following. In Block 202, the network device (e.g., base station or gNB) indicates to a terminal device (e.g., a user equipment (UE) ) which LTM trigger event is configured for lower layer triggered mobility (LTM) . In Block 204, the network device receives a report from the terminal device when the configured LTM trigger event happens about a corresponding measurement (e.g., L1-RSRP or L1-SINR) on at least one of a physical reference signal (RS) resource (e.g., CSI-RS resource and / or SS / PBCH block) of a serving cell and physical RS resources (e.g., CSI-RS resources and / or SS / PBCH blocks) of candidate cells measured according to the configured LTM trigger event. This facilitates implementing an effective even-triggered measurement reporting for LTM with necessary measurement results, thereby enabling the system to make correct decision on UE mobility effectively. Other details of the method 200 may be referred to the method 100 described above and are not repeated herein.
[0056] Further details about the invention are provided below.
[0057] In one embodiment, a UE can be configured to operate event-triggered L1 measurement and report for LTM. For that, the UE can be provided with one or more of the following configurations:
[0058] · One LTM event indicator to indicate which LTM trigger event is configured.
[0059] · A list of candidate cells for LTM trigger event.
[0060] · A list of CSI-RS resources and / or SS / PBCH blocks of candidate cells for the UE to measure to evaluate the configured LTM trigger event.
[0061] · A first threshold for the measurement on RS that is used to evaluate the serving cell. The L1 measurement of the serving cell can be L1-RSRP of the RS or the L1-SINR of the RS. If the L1 measurement is L1-RSRP, the first threshold is a L1-RSRP value. If the L1 measurement is L1-SINR, the first threshold is a L1-SINR value.
[0062] · A second threshold for the measurement on RSs that are used to evaluate the candidate cells. The L1 measurement on the RSs of the candidate cells can be L1-RSRP of the RSs or the L1-SINR of the RSs. If the L1 measurement is L1-RSRP, the second threshold is a L1-RSRP value. If the L1 measurement is L1-SINR, the second threshold is a L1-SINR value.
[0063] The UE can be requested to measure and evaluate the RS of the serving cell and RSs of the candidate cells according to the configured LTM trigger event. When the configured trigger event happens, the UE can be requested to report the corresponding measurement to the gNB. The UE can be requested to report one or more of the following in one MAC CE message:
[0064] · One indicator to indicate which trigger event is trigged.
[0065] · The L1 measurement result of the RS of the serving cell. It can be a L1-RSRP measurement result. It can be a L1-SINR measurement result. It can be a differential L1-RSRP value. It can be a differential L1-SINR value.
[0066] · The L1 measurement results of one or more RSs of candidate cells. It can be a L1-RSRP measurement result. It can be a L1-SINR measurement result. It can be a differential L1-RSRP value. It can be a differential L1-SINR value.
[0067] · The indicator of each RS of candidate cells that the UE reports the corresponding L1 measurement.
[0068] · The number of reported RSs of candidate cells.
[0069] In a first method, the UE can be configured with a first LTM trigger event. For the first LTM trigger event, the UE measure a first CSI-RS resource or SS / PBCH block of the serving cell. The first LTM trigger event occurs when the L1 measurement of the first CSI-RS or SSB is less than the corresponding first threshold. Here the L1 measurement of the first CSI-RS or SSB of the serving cell can be a L1-RSRP. Thus, the first LTM trigger event occurs when the L1-RSRP measurement the first CSI-RS or SSB of the serving cell is less than the first threshold of L1-RSRP. Here the L1 measurement of the first CSI-RS or SSB of the serving cell can be a L1-SINR. Thus, the first LTM trigger event occurs when the L1-SINR measurement the first CSI-RS or SSB of the serving cell is less than the first threshold of L1-SINR. When the first LTM trigger event happens, the UE can be requested to report one or more of the following information:
[0070] · One indicator to indicate that the first LTM trigger event happens;
[0071] · The L1-RSRP measurement of the first CSI-RS resource or SSB of the serving cell.
[0072] · The differential L1-RSRP measurement of the first CSI-RS resource or SSB of the serving cell and this differential L1-RSRP measurement is calculated with reference to the first threshold of L1-RSRP.
[0073] · The L1-SINR measurement of the first CSI-RS resource or SSB of the serving cell.
[0074] · The differential L1-SINR measurement of the first CSI-RS resource or SSB of the serving cell and this differential L1-SINR measurement is calculated with reference to the first threshold of L1-SINR.
[0075] In a second method, the UE can be configured with a second LTM trigger event. For the second LTM trigger event, the UE can be provided with a list of CSI-RS resources and / or SS / PBCH blocks of candidate cells. The UE can be requested to measure the L1 measurement of those provided CSI-RS resources and / or SS / PBCH blocks of candidate cells. The UE can also be provided with a second threshold for the L1 measurement. The second LTM trigger event occurs when the L1 measurement of one or more of the configured CSI-RS resources or SSBs of candidate cells is greater than the corresponding second threshold. Here the L1 measurement of the CSI-RS or SSB of the candidate cell can be a L1-RSRP. Thus, the second LTM trigger event occurs when the L1-RSRP measurement of one or more of the configured CSI-RS or SSB of the candidate cells is greater than the second threshold of L1-RSRP. Here the L1 measurement of the CSI-RS or SSB of the candidate cell can be a L1-SINR. Thus, the second LTM trigger event occurs when the L1-SINR measurement of one or more of the configured CSI-RS or SSB of the candidate cells is greater than the second threshold of L1-SINR. When the second LTM trigger event happens, the UE can be requested to report one or more of the following information:
[0076] · One indicator to indicate that the second LTM trigger event happens;
[0077] · The UE can report the indicators of CSI-RS resources or SSBs of candidate cells that trigger the second LTM trigger event. The UE can report one indicator for each CSI-RS resource or SSBs of candidate cells that triggers the second LTM trigger event.
[0078] · The UE can report the number of reported CSI-RS resources / SSBs of candidate cells.
[0079] · The UE can report the L1-RSRP measurement of each reported CSI-RS resource or SSB of the candidate cells.
[0080] · The UE can report the differential L1-RSRP measurement of each reported CSI-RS resource or SSB of the candidate cells with reference to the value of the second threshold of L1-RSRP.
[0081] · The UE can report the L1-RSRP measurement of the reported CSI-RS resource or SSB with the largest L1-RSRP and the UE reports the differential L1-RSRP of all other reported CSI-RS resource or SSB with a reference to the reported largest L1-RSRP in the same reporting instance.
[0082] · The UE can report the L1-SINR measurement of each reported CSI-RS resource or SSB of the candidate cells.
[0083] · The UE can report the differential L1-SINR measurement of each reported CSI-RS resource or SSB of the candidate cells with reference to the value of the second threshold of L1-SINR.
[0084] · The UE can report the L1-SINR measurement of the reported CSI-RS resource or SSB of the candidate cells with the largest L1-SINR and the UE reports the differential L1-SINR of all other reported CSI-RS resource or SSB with a reference to the reported largest L1-SINR in the same reporting instance.
[0085] In a third method, the UE can be configured with a third LTM trigger event. For the third LTM trigger event,
[0086] · the UE can be provided with a list of CSI-RS resources and / or SS / PBCH blocks of candidate cells. The UE can be requested to measure L1 measurement of the configured CSI-RS resources and / or SSBs of candidate cells. The L1 measurement can be L1-RSRP or L1-SINR.
[0087] · the UE can be requested to measure a first CSI-RS resource or SS / PBCH block of the serving cell and the UE can be requested to measure L1-RSRP or L1-SINR.
[0088] The UE can also be provided with an offset value for the L1 measurement. The third LTM trigger event occurs when the L1 measurement of one or more of the configured CSI-RS resources or SSBs of candidate cells is at least the offset value greater than the L1 measurement of the first CSI-RS resource or SSB of the serving cell. Here the L1 measurement of the CSI-RS or SSB of the candidate cell can be a L1-RSRP. Thus, the third LTM trigger event occurs when the L1-RSRP measurement of one or more of the configured CSI-RS or SSB of the candidate cells is at least the offset value greater than the L1-RSRP of the first CSI-RS resource or SSB of the serving cell. Here the L1 measurement of the CSI-RS or SSB of the candidate cell can be a L1-SINR. Thus, the third LTM trigger event occurs when the L1-SINR measurement of one or more of the configured CSI-RS or SSB of the candidate cells is at least the offset value greater than the L1-SINR measurement of the first CSI-RS resource or SSB of the serving cell. When the third LTM trigger event happens, the UE can be requested to report one or more of the following information:
[0089] ·One indicator to indicate that the third LTM trigger event happens;
[0090] · The L1-RSRP measurement of the first CSI-RS resource or SSB of the serving cell.
[0091] · The L1-SINR measurement of the first CSI-RS resource or SSB of the serving cell.
[0092] · The UE can report the indicators of CSI-RS resources or SSBs of candidate cells that trigger the third LTM trigger event. The UE can report one indicator for each CSI-RS resource or SSBs of candidate cells that triggers the third LTM trigger event.
[0093] · The UE can report the number of reported CSI-RS resources / SSBs of candidate cells.
[0094] · The UE can report the L1-RSRP measurement of each reported CSI-RS resource or SSB of the candidate cells.
[0095] · The UE can report the differential L1-RSRP measurement of each reported CSI-RS resource or SSB of the candidate cells with reference to the L1-RSRP of the first CSI-RS or SSB of the serving cell.
[0096] · The UE can report the L1-RSRP measurement of the reported CSI-RS resource or SSB of the candidate cells with the largest L1-RSRP and the UE reports the differential L1-RSRP of all other reported CSI-RS resource or SSB with a reference to the reported largest L1-RSRP in the same reporting instance.
[0097] · The UE can report the differential L1-RSRP of the first CSI-RS or SSB of the serving cell with a reference to the largest L1-RSRP reported in the same reporting instance.
[0098] · The UE can report the L1-SINR measurement of each reported CSI-RS resource or SSB of the candidate cells.
[0099] · The UE can report the differential L1-SINR measurement of each reported CSI-RS resource or SSB of the candidate cells with reference to the L1-SINR of the first CSI-RS or SSB of the serving cell.
[0100] · The UE can report the L1-SINR measurement of the reported CSI-RS resource or SSB with the largest L1-SINR and the UE reports the differential L1-SINR of all other reported CSI-RS resource or SSB with a reference to the reported largest L1-SINR in the same reporting instance.
[0101] · The UE can report the differential L1-SINR of the first CSI-RS or SSB of the serving cell with a reference to the largest L1-SINR reported in the same reporting instance.
[0102] In a fourth method, the UE can be configured with a fourth LTM trigger event. For the fourth LTM trigger event,
[0103] · the UE can be requested to measure a first CSI-RS resource or SS / PBCH block of the serving cell and the UE can be requested to measure L1-RSRP or L1-SINR. The UE can be provided with a first threshold for L1 measurement on the RS of the serving cell. The first threshold can be a threshold of L1-RSRP or a threshold of L1-SINR.
[0104] · the UE can be provided with a list of CSI-RS resources and / or SS / PBCH blocks of candidate cells. The UE can be requested to measure L1 measurement of the configured CSI-RS resources and / or SSBs of candidate cells. The L1 measurement can be L1-RSRP or L1-SINR. The UE can be provided with a second threshold for L1 measurement on the CSI-RS or SSB of the candidate cells. The second threshold can be a threshold of L1-RSRP or a threshold of L1-SINR.
[0105] The fourth LTM trigger event occurs when the L1 measurement of one or more of the configured CSI-RS resources or SSBs of candidate cells is greater than the second threshold and the L1 measurement of the first CSI-RS resource or SSB of the serving cell is less than the first threshold. Here the L1 measurement can be a L1-RSRP. Thus, the fourth LTM trigger event occurs when the L1-RSRP measurement of one or more of the configured CSI-RS or SSB of the candidate cells is greater than the second threshold of L1-RSRP and the L1-RSRP of the first CSI-RS resource or SSB of the serving cell is less than the first threshold of L1-RSRP. Here the L1 measurement can be a L1-SINR. Thus, the fourth LTM trigger event occurs when the L1-SINR measurement of one or more of the configured CSI-RS or SSB of the candidate cells is greater than the second threshold of L1-SINR, and the L1-SINR measurement of the first CSI-RS resource or SSB of the serving cell is less than the first threshold of L1-SINR. When the fourth LTM trigger event happens, the UE can be requested to report one or more of the following information:
[0106] · One indicator to indicate that the fourth LTM trigger event happens;
[0107] · The L1-RSRP measurement of the first CSI-RS resource or SSB of the serving cell.
[0108] · The differential L1-RSRP of the first CSI-RS resource or SSB of the serving cell with a reference to the first threshold of L1-RSRP.
[0109] · The L1-SINR measurement of the first CSI-RS resource or SSB of the serving cell.
[0110] · The differential L1-SINR of the first CSI-RS resource or SSB of the serving cell with a reference to the first threshold of L1-SINR.
[0111] · The UE can report the indicators of CSI-RS resources or SSBs of candidate cells that trigger the fourth LTM trigger event. The UE can report one indicator for each CSI-RS resource or SSBs of candidate cells that triggers the fourth LTM trigger event.
[0112] · The UE can report the number of reported CSI-RS resources / SSBs of candidate cells.
[0113] · The UE can report the L1-RSRP measurement of each reported CSI-RS resource or SSB of the candidate cells.
[0114] · The UE can report the differential L1-RSRP measurement of each reported CSI-RS resource or SSB of the candidate cells with a reference to the second threshold of L1-RSRP.
[0115] · The UE can report the differential L1-RSRP measurement of each reported CSI-RS resource or SSB of the candidate cells with a reference to the L1-RSRP of the first CSI-RS or SSB of the serving cell.
[0116] · The UE can report the L1-RSRP measurement of the reported CSI-RS resource or SSB of the candidate cells with the largest L1-RSRP and the UE reports the differential L1-RSRP of all other reported CSI-RS resource or SSB with a reference to the reported largest L1-RSRP in the same reporting instance.
[0117] · The UE can report the differential L1-RSRP of the first CSI-RS or SSB of the serving cell with a reference to the largest L1-RSRP reported in the same reporting instance.
[0118] · The UE can report the L1-SINR measurement of each reported CSI-RS resource or SSB of the candidate cells.
[0119] · The UE can report the differential L1-SINR measurement of each reported CSI-RS resource or SSB of the candidate cells with a reference to the second threshold of L1-SINR.
[0120] · The UE can report the differential L1-SINR measurement of each reported CSI-RS resource or SSB of the candidate cells with a reference to the L1-SINR of the first CSI-RS or SSB of the serving cell.
[0121] · The UE can report the L1-SINR measurement of the reported CSI-RS resource or SSB of the candidate cells with the largest L1-SINR and the UE reports the differential L1-SINR of all other reported CSI-RS resource or SSB with a reference to the reported largest L1-SINR in the same reporting instance.
[0122] · The UE can report the differential L1-SINR of the first CSI-RS or SSB of the serving cell with a reference to the largest L1-SINR reported in the same reporting instance.
[0123] FIG. 4 illustrates a terminal device 300 according to an embodiment of the present application. The terminal device (e.g., a user equipment (UE) ) 300 includes a first indication module 301, a measuring module 302 and a reporting module 303. The first indication module 301 is configured to be indicated by a network device (e.g., base station or gNB) which LTM trigger event is configured for lower layer triggered mobility (LTM) . The measuring module 302 is configured to measure at least one of a physical reference signal (RS) resource (e.g., CSI-RS resource and / or SS / PBCH block) of a serving cell and physical RS resources (e.g., CSI-RS resources and / or SS / PBCH blocks) of candidate cells according to the configured LTM trigger event. The reporting module 303 is configured to report a corresponding measurement (e.g., L1-RSRP or L1-SINR) on the at least one of the serving cell and the candidate cells to the network device when the configured LTM trigger event happens. This facilitates implementing an effective even-triggered measurement reporting for LTM with necessary measurement results, thereby enabling the system to make correct decision on UE mobility effectively.
[0124] FIG. 5 illustrates a network device 400 according to an embodiment of the present application. The network device (e.g., base station or gNB) 400 includes a second indication module 401 and a receiving module 402. The second indication module 401 is configured to indicate to a terminal device (e.g., a user equipment (UE) ) which LTM trigger event is configured for lower layer triggered mobility (LTM) . The receiving module 402 is configured to receive a report from the terminal device when the configured LTM trigger event happens about a corresponding measurement (e.g., L1-RSRP or L1-SINR) on at least one of a physical reference signal (RS) resource (e.g., CSI-RS resource and / or SS / PBCH block) of a serving cell and physical RS resources (e.g., CSI-RS resources and / or SS / PBCH blocks) of candidate cells measured according to the configured LTM trigger event. This facilitates implementing an effective even-triggered measurement reporting for LTM with necessary measurement results, thereby enabling the system to make correct decision on UE mobility effectively.
[0125] The embodiment of the present application further provides a computer readable storage medium for storing a computer program. The computer readable storage medium enables a computer to execute corresponding processes implemented in each of the methods of the embodiments of the present application. For brevity, details will not be described herein again.
[0126] The embodiment of the present application further provides a computer program product including computer program instructions. The computer program product enables a computer to execute corresponding processes implemented in each of the methods of the embodiments of the present application. For brevity, details will not be described herein again.
[0127] The embodiment of the present application further provides a computer program. The computer program enables a computer to execute corresponding processes implemented in each of the methods of the embodiments of the present application. For brevity, details will not be described herein again.
[0128] The description of above device embodiments is similar to the description of above method embodiments, having beneficial effects similar to the method embodiments. For technical details not disclosed in the device embodiments of the present application, please refer to the description of the method embodiments of the present application for the purpose of understanding.
[0129] Commercial interests for some embodiments are as follows. 1. Solving issues in the prior art. 2. Implementing an effective even-triggered measurement reporting. 3. Generating a report with necessary measurement results. 4. Reducing latency. 5. Providing a good communication performance. 6. Providing high reliability. Some embodiments of the present application are used by 5G-NR chipset vendors, V2X communication system development vendors, automakers including cars, trains, trucks, buses, bicycles, moto-bikes, helmets, and etc., drones (unmanned aerial vehicles) , smartphone makers, communication devices for public safety use, AR / VR device maker for example gaming, conference / seminar, education purposes. The deployment scenarios include, but not limited to, indoor hotspot, dense urban, urban micro, urban macro, rural, factor hall, and indoor D2D scenarios. Some embodiments of the present application are a combination of “techniques / processes” that can be adopted in 3GPP specification to create an end product. Some embodiments of the present application could be adopted in 5G NR licensed and non-licensed or shared spectrum communications. Some embodiments of the present application propose technical mechanisms. The present example embodiment is applicable to NR in unlicensed spectrum (NR-U) . The present application can be applied to other mobile networks, in particular to mobile network of any further generation cellular network technology (6G, etc. ) .
[0130] FIG. 6 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present application. Embodiments described herein may be implemented into the system using any suitably configured hardware and / or software. FIG. 6 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory / storage 740, a display 750, a camera 760, a sensor 770, and an input / output (I / O) interface 780, coupled with each other at least as illustrated. The application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors. The processors may be coupled with the memory / storage and configured to execute instructions stored in the memory / storage to enable various applications and / or operating systems running on the system.
[0131] The baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include a baseband processor. The baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuitry may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) , 5G NR (New Radio) network, and / or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) . Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
[0132] In various embodiments, the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency. For example, in some embodiments, baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency. The RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. In various embodiments, the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency. For example, in some embodiments, RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
[0133] In various embodiments, the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and / or the application circuitry. As used herein, “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC) , an electronic circuit, a processor (shared, dedicated, or group) , and / or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and / or other suitable hardware components that provide the described functionality. In some embodiments, the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules. In some embodiments, some or all of the constituent components of the baseband circuitry, the application circuitry, and / or the memory / storage may be implemented together on a system on a chip (SOC) . The memory / storage 740 may be used to load and store data and / or instructions, for example, for system. The memory / storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM) , and / or non-volatile memory, such as flash memory.
[0134] In various embodiments, the I / O interface 780 may include one or more user interfaces designed to enable user interaction with the system and / or peripheral component interfaces designed to enable peripheral component interaction with the system. User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface. In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and / or location information related to the system. In some embodiments, the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of, or interact with, the baseband circuitry and / or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
[0135] In various embodiments, the display 750 may include a display, such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, an AR / VR glasses, etc. In various embodiments, system may have more or less components, and / or different architectures. Where appropriate, methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium, such as a non-transitory storage medium.
[0136] A person having ordinary skill in the art understands that each of the units, algorithm, and steps described and disclosed in the embodiments of the present application are realized using electronic hardware or combinations of software for computers and electronic hardware. Whether the functions run in hardware or software depends on the condition of application and design requirement for a technical plan. A person having ordinary skill in the art can use different ways to realize the function for each specific application while such realizations should not go beyond the scope of the present application. It is understood by a person having ordinary skill in the art that he / she can refer to the working processes of the system, device, and unit in the above-mentioned embodiment since the working processes of the above-mentioned system, device, and unit are basically the same. For easy description and simplicity, these working processes will not be detailed.
[0137] It is understood that the disclosed system, device, and method in the embodiments of the present application can be realized with other ways. The above-mentioned embodiments are exemplary only. The division of the units is merely based on logical functions while other divisions exist in realization. It is possible that a plurality of units or components are combined or integrated in another system. It is also possible that some characteristics are omitted or skipped. On the other hand, the displayed or discussed mutual coupling, direct coupling, or communicative coupling operate through some ports, devices, or units whether indirectly or communicatively by ways of electrical, mechanical, or other kinds of forms.
[0138] The units as separating components for explanation are or are not physically separated. The units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments. Moreover, each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.
[0139] If the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer. Based on this understanding, the technical plan proposed by the present application can be essentially or partially realized as the form of a software product. Or, one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product. The software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present application. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM) , a random access memory (RAM) , a floppy disk, or other kinds of media capable of storing program codes.
[0140] While the present application has been described in connection with what is considered the most practical and preferred embodiments, it is understood that the present application is not limited to the disclosed embodiments but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.
Claims
1.A method of reporting event-trigged measurement, performed by a terminal device, comprising:being indicated by a network device which LTM trigger event is configured for lower layer triggered mobility (LTM) ;measuring at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells according to the configured LTM trigger event; andreporting a corresponding measurement on the at least one of the serving cell and the candidate cells to the network device when the configured LTM trigger event happens.2.The method of claim 1, wherein the physical RS resource comprises channel state information reference signal (CSI-RS) resource or synchronization signal (SS) / physical broadcast channel (PBCH) block.3.The method of claim 1 or 2, wherein the measurement on the serving cell comprises Layer 1 reference signal received power (L1-RSRP) or Layer1 signal-to-interference-plus-noise ratio (L1-SINR) of the physical RS resource of the serving cell.4.The method of any of claims 1 to 3, wherein the measurement on the candidate cells comprises L1-RSRP or L1-SINR of the physical RS resources of the candidate cells.5.The method of any of claims 1 to 4, wherein the corresponding measurement on the at least one of the serving cell and the candidate cells is reported in a media access control control element (MAC CE) message.6.The method of any of claims 1 to 5, wherein the configured LTM trigger event comprises a first LTM trigger event, and based on the first LTM trigger event, the physical RS resource of the serving cell is measured.7.The method of claim 6, wherein the first LTM trigger event occurs when the measurement of the physical RS resource of the serving cell is less than a first threshold.8.The method of claim 7, wherein when the first LTM trigger event happens, one or more of the following information is reported to the network device:the measurement of the physical RS resource of the serving cell; anda differential measurement of the physical RS resource of the serving cell with reference to the first threshold.9.The method of claim 7 or 8, wherein when the first LTM trigger event happens, one or more of the following information is reported to the network device:one indicator to indicate that the first LTM trigger event happens.10.The method of any of claims 1 to 5, wherein the configured LTM trigger event comprises a second LTM trigger event, and based on the second LTM trigger event, the physical RS resources of the candidate cells are measured.11.The method of claim 10, wherein the second LTM trigger event occurs when the measurement of one or more of the physical RS resources of the candidate cells is greater than a second threshold.12.The method of claim 11, wherein when the second LTM trigger event happens, one or more of the following information is reported to the network device:the measurement of each reported physical RS resource of the candidate cells;a differential measurement of each reported physical RS resource of the candidate cells with reference to the second threshold; andthe measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance.13.The method of claim 11 or 12, wherein when the second LTM trigger event happens, one or more of the following information is reported to the network device:one indicator to indicate that the second LTM trigger event happens;one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the second LTM trigger event; anda number of reported physical RS resources of candidate cells.14.The method of any of claims 1 to 5, wherein the configured LTM trigger event comprises a third LTM trigger event, and based on the third LTM trigger event, the physical RS resource of the serving cell and the physical RS resources of the candidate cells are measured.15.The method of claim 14, wherein the third LTM trigger event occurs when the measurement of one or more of the physical RS resources of the candidate cells is at least an offset value greater than the measurement of the physical RS resource of the serving cell.16.The method of claim 15, wherein when the third LTM trigger event happens, one or more of the following information is reported to the network device:the measurement of the physical RS resource of the serving cell;the measurement of each reported physical RS resource of the candidate cells;a differential measurement of each reported physical RS resource of the candidate cells with reference to a power measurement of the physical RS resource of the serving cell;the measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance; anda differential measurement of the physical RS resource of the serving cell with reference to the largest power measurement reported in the same reporting instance.17.The method of claim 15 or 16, wherein when the third LTM trigger event happens, one or more of the following information is reported to the network device:one indicator to indicate that the third LTM trigger event happens;one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the third LTM trigger event; anda number of reported physical RS resources of candidate cells.18.The method of any of claims 1 to 5, wherein the configured LTM trigger event comprises a fourth LTM trigger event, and based on the fourth LTM trigger event, the physical RS resource of the serving cell and the physical RS resources of the candidate cells are measured.19.The method of claim 18, wherein the fourth LTM trigger event occurs when the measurement of one or more of the physical RS resources of the candidate cells is greater than a second threshold and the measurement of the physical RS resource of the serving cell is less than a first threshold.20.The method of claim 19, wherein when the fourth LTM trigger event happens, one or more of the following information is reported to the network device:the measurement of the physical RS resource of the serving cell;a differential measurement of the physical RS resource of the serving cell with reference to the first threshold;the measurement of each reported physical RS resource of the candidate cells;a differential measurement of each reported physical RS resource of the candidate cells with reference to the second threshold;a differential measurement of each reported physical RS resource of the candidate cells with reference to a power measurement of the physical RS resource of the serving cell;the measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance; anda differential measurement of the physical RS resource of the serving cell with reference to the largest power measurement reported in the same reporting instance.21.The method of claim 19 or 20, wherein when the fourth LTM trigger event happens, one or more of the following information is reported to the network device:one indicator to indicate that the fourth LTM trigger event happens;one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the fourth LTM trigger event; anda number of reported physical RS resources of candidate cells.22.A method of receiving event-trigged measurement report, performed by a network device, comprising:indicating to a terminal device which LTM trigger event is configured for lower layer triggered mobility (LTM) ; andreceiving a report from the terminal device when the configured LTM trigger event happens about a corresponding measurement on at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells measured according to the configured LTM trigger event.23.The method of claim 22, wherein the physical RS resource comprises channel state information reference signal (CSI-RS) resource or synchronization signal (SS) / physical broadcast channel (PBCH) block.24.The method of claim 22 or 23, wherein the measurement on the serving cell comprises Layer 1 reference signal received power (L1-RSRP) or Layer1 signal-to-interference-plus-noise ratio (L1-SINR) of the physical RS resource of the serving cell.25.The method of any of claims 22 to 24, wherein the measurement on the candidate cells comprises L1-RSRP or L1-SINR of the physical RS resources of the candidate cells.26.The method of any of claims 22 to 25, wherein the corresponding measurement on the at least one of the serving cell and the candidate cells is received in a media access control control element (MAC CE) message.27.The method of any of claims 22 to 26, wherein the configured LTM trigger event comprises a first LTM trigger event, and based on the first LTM trigger event, the physical RS resource of the serving cell is measured.28.The method of claim 27, wherein the first LTM trigger event occurs when the measurement of the physical RS resource of the serving cell is less than a first threshold.29.The method of claim 28, wherein when the first LTM trigger event happens, one or more of the following information is received by the network device:the measurement of the physical RS resource of the serving cell; anda differential measurement of the physical RS resource of the serving cell with reference to the first threshold.30.The method of claim 28 or 29, wherein when the first LTM trigger event happens, one or more of the following information is received by the network device:one indicator to indicate that the first LTM trigger event happens.31.The method of any of claims 22 to 26, wherein the configured LTM trigger event comprises a second LTM trigger event, and based on the second LTM trigger event, the physical RS resources of the candidate cells are measured.32.The method of claim 31, wherein the second LTM trigger event occurs when the measurement of one or more of the physical RS resources of the candidate cells is greater than a second threshold.33.The method of claim 32, wherein when the second LTM trigger event happens, one or more of the following information is received by the network device:the measurement of each reported physical RS resource of the candidate cells;a differential measurement of each reported physical RS resource of the candidate cells with reference to the second threshold; andthe measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance.34.The method of claim 32 or 33, wherein when the second LTM trigger event happens, one or more of the following information is received by the network device:one indicator to indicate that the second LTM trigger event happens;one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the second LTM trigger event; anda number of reported physical RS resources of candidate cells.35.The method of any of claims 22 to 26, wherein the configured LTM trigger event comprises a third LTM trigger event, and based on the third LTM trigger event, the physical RS resource of the serving cell and the physical RS resources of the candidate cells are measured.36.The method of claim 35, wherein the third LTM trigger event occurs when the measurement of one or more of the physical RS resources of the candidate cells is at least an offset value greater than the measurement of the physical RS resource of the serving cell.37.The method of claim 36, wherein when the third LTM trigger event happens, one or more of the following information is received by the network device:the measurement of the physical RS resource of the serving cell;the measurement of each reported physical RS resource of the candidate cells;a differential measurement of each reported physical RS resource of the candidate cells with reference to a power measurement of the physical RS resource of the serving cell;the measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance; anda differential measurement of the physical RS resource of the serving cell with reference to the largest power measurement reported in the same reporting instance.38.The method of claim 36 or 37, wherein when the third LTM trigger event happens, one or more of the following information is received by the network device:one indicator to indicate that the third LTM trigger event happens;one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the third LTM trigger event; anda number of reported physical RS resources of candidate cells.39.The method of any of claims 22 to 26, wherein the configured LTM trigger event comprises a fourth LTM trigger event, and based on the fourth LTM trigger event, the physical RS resource of the serving cell and the physical RS resources of the candidate cells are measured.40.The method of claim 39, wherein the fourth LTM trigger event occurs when the measurement of one or more of the physical RS resources of the candidate cells is greater than a second threshold and the measurement of the physical RS resource of the serving cell is less than a first threshold.41.The method of claim 40, wherein when the fourth LTM trigger event happens, one or more of the following information is received by the network device:the measurement of the physical RS resource of the serving cell;a differential measurement of the physical RS resource of the serving cell with reference to the first threshold;the measurement of each reported physical RS resource of the candidate cells;a differential measurement of each reported physical RS resource of the candidate cells with reference to the second threshold;a differential measurement of each reported physical RS resource of the candidate cells with reference to a power measurement of the physical RS resource of the serving cell;the measurement of a reported physical RS resource of the candidate cells with a largest power measurement and a differential measurement of all other reported physical RS resources with reference to the reported largest power measurement in a same reporting instance; anda differential measurement of the physical RS resource of the serving cell with reference to the largest power measurement reported in the same reporting instance.42.The method of claim 40 or 41, wherein when the fourth LTM trigger event happens, one or more of the following information is received by the network device:one indicator to indicate that the fourth LTM trigger event happens;one indicator of each of the one or more of the physical RS resources of the candidate cells that triggers the fourth LTM trigger event; anda number of reported physical RS resources of candidate cells.43.A terminal device, comprising:a memory; anda processor coupled to the memory,wherein the processor is configured to call and run program instructions stored in the memory, to execute the method of any of claims 1 to 21.44.A network device, comprising:a memory; anda processor coupled to the memory,wherein the processor is configured to call and run program instructions stored in the memory, to execute the method of any of claims 22 to 42.45.A terminal device, comprising:a first indication module, configured to be indicated by a network device which LTM trigger event is configured for lower layer triggered mobility (LTM) ;a measuring module, configured to measure at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells according to the configured LTM trigger event; anda reporting module, configured to report a corresponding measurement on the at least one of the serving cell and the candidate cells to the network device when the configured LTM trigger event happens.46.A network device, comprising:a second indication module, configured to indicate to a terminal device which LTM trigger event is configured for lower layer triggered mobility (LTM) ; anda receiving module, configured to receive a report from the terminal device when the configured LTM trigger event happens about a corresponding measurement on at least one of a physical reference signal (RS) resource of a serving cell and physical RS resources of candidate cells measured according to the configured LTM trigger event.47.A non-transitory machine-readable storage medium having stored thereon instructions that, when executed by a computer, cause the computer to execute the method of any one of claims 1 to 21 or the method of any one of claims 22 to 42.48.A chip, comprising:a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the method of any one of claims 1 to 21 or the method of any one of claims 22 to 42.49.A computer readable storage medium, in which a computer program is stored, wherein the computer program causes a computer to execute the method of any one of claims 1 to 21 or the method of any one of claims 22 to 42.50.A computer program product, comprising a computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 21 or the method of any one of claims 22 to 42.51.A computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 21 or the method of any one of claims 22 to 42.
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