WO2023131895A1

WO2023131895A1 - Methods and apparatus of l1/l2 based inter-cell measurement

Info

Publication number: WO2023131895A1
Application number: PCT/IB2023/050088
Authority: WO
Inventors: Li Guo
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-01-10
Filing date: 2023-01-05
Publication date: 2023-07-13
Anticipated expiration: 2024-07-10

Abstract

Methods and systems for enabling NR systems to perform L1/L2 measurement on SSBs or CSI-RS resource mobility of neighbor cells are provided. In some embodiments, the method includes (1) receiving, by a terminal device, a request to perform a measurement on transmission resources for mobility of one or more target cells; (2) receiving, by the terminal device, configuration information for the transmission resources; and (3) performing, by the terminal device, the measurement on the transmission resources. The configuration information includes a physical cell ID (PCI) for identifying at least one of the one or more target cells.

Description

METHODS AND APPARATUS OF L1/L2 BASED INTER-CELL

MEASUREMENT

CROSS-REFERENCE TO RELATED APPLICATION(S)

[0001] This application claims the benefit of priority of U.S. Provisional Patent Application Serial No. 63/266,602, filed January 10, 2022, which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

[0002] The present disclosure relates to transmission measurement for mobility of neighboring cells. More specifically, systems and methods for enabling a Layer-1 (L1) or Layer-2 (L2) measurement on Synchronization Signal and Physical Broadcast Channel (SS/PBCH) Blocks (SSBs) and/or Channel State Information Reference Signal (CSI-RS) resources for mobility of neighboring cells are provided.

BACKGROUND

[0003] New Radio (NR) and fifth generation (5G) communication systems support Radio Resource Management (RRM) measurements. A system can request a terminal device (or user equipment, UE) to measure SSBs and/or CSI-RS for mobility of multiple neighbor cells. The terminal device then reports the measurement result to the system. The reported measurement result can be used by the system to determine inter-cell mobility.

[0004] The system provides an RRM measurement configuration to the terminal device through a Radio Resource Control (RRC) signaling. Based on the RRM measurement configuration, the terminal device can measure Layer-3 Reference Signal Received Power (L3-RSRP), Layer-3 Reference Signal Received Quality (L3- RSRQ) or Layer-3 Received Signal Strength Indicator (L3-RSSI) on the SSB and/or CSI-RS for mobility of some target cells provided in the RRM configuration. The terminal device reports the measurement result to the system through the RRC signaling.

[0005] One drawback in the traditional method is relying on RRC signaling to perform RRM measurements. For example, a terminal device performs L3 measurement and then reports a measurement result through RRC signaling. As a result, the latency and overhead of the RRM measurement is large. Thus, the traditional RRM measurement is not capable of assisting Layer- 1 /Layer-2 (L1/L2) based inter-cell mobility.

[0006] Another drawback is that the conventional function of measuring L1- RSRP of SSBs of different Physical Cell ID (PCI) assumes all the SSBs are on the same frequency and uses the same subcarrier spacing as a serving cell. Therefore, it is not able to support inter-cell mobility scenarios where a target cell is on different frequency, or uses different subcarrier spacing, or is not synchronized with the serving cell. Thus, improved systems and methods that can address the foregoing issues are desirable and beneficial.

SUMMARY

[0007] The present disclosure is related to systems and methods for enabling NR systems to perform L1/L2 measurement on SSBs or CSI-RS resource mobility of neighbor cells. The present systems and methods provide a “low-latency” L1 measurement for mobility and thus support L1/L2-based inter-cell mobility measurement with low latency and low interrupting time.

[0008] In some embodiments, a base station (e.g., a gNB) requests a terminal device (e.g., UE) to perform an L1 measurement on SSBs and/or CSI-RS resources for mobility of one or more target cells. The base station can also request the terminal device to report a result of the L1 measurement. The base station provides configuration information of SSBs and/or CSI-RS resource for mobility of one or more target cells to the terminal device.

[0009] In the configuration information, the base station can provide one or more of the following information: (1) a physical cell ID (PCI) that is used to identify one target cell, (2) a configuration of SSB signal, (3) a list of SSB indices; (4) a configuration of processing window for SSB of the target cell; (5) a configuration of measurement gap associated with the target cell; (6) a configuration of CSI-RS for mobility of the target cell.

[0010] When the terminal device receives the foregoing configuration information, the terminal device can be requested to receive and process the SSB and/or CSI-RS resources for mobility according to the configuration information. By this arrangement, without using RRC signaling, the present systems and methods can perform L1 measurement on SSBs or CSI-RS resource mobility of neighbor cells with low latency and low interrupting time. In some embodiments, L2 measurement can also be performed in a similar fashion.

[0011] In some embodiments, the present method can be implemented by a tangible, non-transitory, computer-readable medium having processor instructions stored thereon that, when executed by one or more processors, cause the one or more processors to perform one or more aspects/features of the method described herein. In other embodiments, the present method can be implemented by a system comprising a computer processor and a non-transitory computer-readable storage medium storing instructions that when executed by the computer processor cause the computer processor to perform one or more actions of the method described herein.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To describe the technical solutions in the implementations of the present disclosure more clearly, the following briefly describes the accompanying drawings. The accompanying drawings show merely some aspects or implementations of the present disclosure, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

[0013] Fig. 1 is a schematic diagram of a wireless communication system in accordance with one or more implementations of the present disclosure.

[0014] Fig. 2 is a schematic block diagram of a terminal device in accordance with one or more implementations of the present disclosure.

[0015] Fig. 3 is a flowchart of a method in accordance with one or more implementations of the present disclosure.

[0016] Fig. 4 is a flowchart of a method in accordance with one or more implementations of the present disclosure.

DETAILED DESCRIPTION

[0017] To describe the technical solutions in the implementations of the present disclosure more clearly, the following briefly describes the accompanying drawings. The accompanying drawings show merely some aspects or implementations of the present disclosure, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

[0018] Fig. 1 is a schematic diagram of a wireless communication system 100 in accordance with one or more implementations of the present disclosure. The wireless communication system 100 can implement the methods for enabling terminal devices to perform L1 measurement on SSBs or CSI-RS resource mobility of neighbor cells. As shown in Fig. 1 , the wireless communications system 100 includes a network device (or base station/cell) 101 and a target cell (or target base station/network device) 107.

[0019] Examples of the network device 101 and target cell 107 include a base transceiver station (Base Transceiver Station, BTS), a NodeB (NodeB, NB), an evolved Node B (eNB or eNodeB), a Next Generation NodeB (gNB or gNode B), a Wireless Fidelity (Wi-Fi) access point (AP), etc. In some embodiments, the network device 101 and target cell 107 can include a relay station, an access point, an in- vehicle device, a wearable device, and the like. The network device 101 and target cell 107 can include wireless connection devices for communication networks such as: a Global System for Mobile Communications (GSM) network, a Code Division Multiple Access (CDMA) network, a Wideband CDMA (WCDMA) network, an LTE network, a cloud radio access network (Cloud Radio Access Network, CRAN), an Institute of Electrical and Electronics Engineers (IEEE) 802.11 -based network (e.g., a Wi-Fi network), an Internet of Things (loT) network, a device-to-device (D2D) network, a next-generation network (e.g., a 5G network), a future evolved public land mobile network (Public Land Mobile Network, PLMN), or the like. A 5G system or network can be referred to as an NR system or network.

[0020] In Fig. 1 , the wireless communications system 100 also includes a terminal device 103. The terminal device 103 can be an end-user device configured to facilitate wireless communication. The terminal device 103 can be configured to wirelessly connect to the network device 101 (via, e.g., via a wireless channel 105A) according to one or more corresponding communication protocols/standards. The terminal device 103 can be switched to wirelessly connect to the target cell 107 (e.g., via a wireless channel 105B). [0021] The terminal device 103 may be mobile or fixed. The terminal device 103 can be a user equipment (UE), an access terminal, a user unit, a user station, a mobile site, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communications device, a user agent, or a user apparatus. Examples of the terminal device 103 include a modem, a cellular phone, a smartphone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device having a wireless communication function, a computing device or another processing device connected to a wireless modem, an in-vehicle device, a wearable device, an Internet- of-Things (loT) device, a device used in a 5G network, a device used in a public land mobile network, or the like. For illustrative purposes, Fig. 1 illustrates only one network device 101 , one target cell 107, and one terminal device 103 in the wireless communications system 100. However, in some instances, the wireless communications system 100 can include additional network device 101 , target cell 107, and/or terminal device 103.

[0022] The network device 101 (e.g., as a serving cell) requests the terminal device 103 to perform an L1 measurement on SSBs and/or CSI-RS resources for mobility of one or more target cells (e.g., the target cell 107). The network device 101 can also request the terminal device 103 to report a result of the L1 measurement. The network device 101 also provides configuration information 11 of SSBs and/or CSI-RS resource for mobility of one or more target cells to the terminal device 103.

[0023] The configuration information 11 can include the following information: (1) a physical cell ID (PCI) that is used to identify a target cell (e.g., the target cell 107), (2) a configuration of SSB signal, (3) a list of SSB indices; (4) a configuration of processing window for SSB of the target cell (e.g., the target cell 107); (5) a configuration of measurement gap associated with the target cell (e.g., the target cell 107); and (6) a configuration of CSI-RS for mobility of the target cell.

[0024] In some embodiments, the configuration of SSB signal can include: a frequency of the SSB, a subcarrier spacing used by the SSB, a transmission periodicity of the SSB, slot offset of the SSB transmission, a transmission (Tx) power of the SSB, etc. [0025] In some embodiments, the configuration of CSI-RS can include: a subcarrier spacing of the CSI-RS for mobility, a frequency domain allocation of the CSI-RS resource for mobility, which can include the index of starting PRB (Physical Resource Block) and the number of PRBs, a time domain allocation for CSI-RS resource for mobility, a Tx power of CSI-RS resource for mobility.

[0026] When the terminal device 103 receives the configuration information 11 , the terminal device 103 can be requested to receive and process the SSB and/or CSI- RS resources for mobility according to the configuration information 11. Without using RRC signaling, the terminal device 101 can perform L1 measurement on SSBs or CSI- RS resource mobility of the target cell 107 with low latency and low interrupting time. In some embodiments, L2 measurement can also be performed in a similar fashion.

[0027] In some embodiments, the network device 101 requests the terminal device 103 to perform an L1 measurement on SSBs and/or CSI-RS resources for mobility of the target cell 107. In some embodiments, the network device 101 can request the terminal device 103 to perform an L1-RSSI measurement on SSBs and/or CSI-RS resources for mobility of the target cell 107. In some embodiments, the network device 101 can request the terminal device 103 to perform an L1-RSRQ measurement on SSBs and/or CSI-RS resources for mobility of the target cell 107. In some embodiments, the network device 101 can request the terminal device 103 to perform an L1-SINR (Signal-to-lnterference-plus-Noise Ratio) measurement on SSBs and/or CSI-RS resources for mobility of the target cell 107. In some embodiments, the network device 101 can request the terminal device 103 to perform a hypothetical Block Error Rate (BLER) measurement on SSBs and/or CSI-RS resources for mobility of the target cell 107.

[0028] In some embodiments, the terminal device 103 can be requested to perform and calculate per cell an L1-RSRP measurement, an L1-RSSI measurement, an L1-RSRQ, an L1-SINR or a hypothetical BLER measurement. In some embodiments, the terminal device 103 can be requested to perform and calculate a per-RS (refence signal) resource (or called per beam) L1-RSRP measurement, L1- RSSI measurement, L1-RSRQ, L1-SINR or hypothetical BLER measurement. In some embodiments, the terminal device 103 can be requested to perform and calculate a per-RS resource set (or called per beam set) L1-RSRP measurement, L1- RSSI measurement, L1-RSRQ, L1-SINR or hypothetical BLER measurement.

[0029] In some embodiments, the terminal device 103 can be requested to measure and report an L1-RSRP measurement of the target cell 107. The terminal device 103 can measure the L1-RSRP of one or more SSBs and/or CSI-RS resources for mobility of the target cell 107. The terminal device 103 can then calculate the L1- RSRP of the target cell 107 based on the L1-RSRP measurement of one or more SSBs and/or CSI-RS resources for mobility of the target cell 107. In the illustrated embodiments, the measurement metrics can also be L1-RSRQ, L1-RSSI, L1-SINR or hypothetical BLER.

[0030] In some embodiments, the network device 101 can indicate the terminal device 103 to measure and calculate an L1-RSRP measurement of one RS set. The network device 101 can indicate the RS set, which can include one or more SSBs and/or CSI-RS resources for mobility. The terminal device 103 can be requested to measure the L1-RSRP of each SSB or CSI-RS resource for mobility contained in the RS set. Then the terminal device 103 can calculate the per-set L1-RSRP measurement based on the L1-RSRP measurement of each RS contained in that set. In the illustrated embodiments, the measurement metrics can also be L1-RSRQ, L1- RSSI, L1-SINR or hypothetical BLER.

[0031] In some implementation, the terminal device 103 can be requested to report the L1-RSRP of each target cell (including the target cell 107), or each RS, or each RS set that is larger than a configured threshold. In some embodiments, the terminal device 103 can be requested to report the L1-RSRQ of each target cell (including the target cell 107), or each RS, or each RS set that is larger than a configured threshold. In some embodiments, the terminal device 103 can be requested to report the L1-RSSI of each target cell (including the target cell 107), or each RS, or each RS set that is larger than a configured threshold. In some example, the terminal device 103 can be requested to report the L1-SINR of each target cell (including the target cell 107), or each RS, or each RS set that is larger than a configured threshold. In some embodiments, the terminal device 103 can be requested to report the hypothetical BLER of each target cell (including the target cell 107), or each RS, or each RS set based on a configured or preconfigured threshold. [0032] In some embodiments, the terminal device 103 can be requested to report an L1 measurement on SSBs and/or CSI-RS resources for mobility of target cells (including the target cell 107) through a Media Access Control (MAC) Control Element (CE) signaling. In the MAC CE signaling, the terminal device 101 can provide one or more of the followings: (1) an indicator of a target cell (e.g., the target cell 107) (e.g., can be an indicator associated with a physical cell ID, PCI); (2) an L1 measurement result of the target cell 107; (3) a list of indicators of SSBs and/or CSI-RS resources for mobility of the target cell 107 and the corresponding L1 measurement of the RS resources; (4) an indicator of RS set and the corresponding L1 measurement of the RS set; and (5) the number of target cells reported in the MAC CE signaling.

[0033] In some embodiments, the terminal device 103 can be requested to report an L1 measurement on SSBs and/or CSI-RS resources for mobility of target cells (including the target cell 107) through Uplink Control Information (UCI) signaling. In one reporting instance, the terminal device 103 can provide one or more of the followings: (1) an indicator of a target cell (e.g., the target cell 107)(e.g., an indicator associated with a physical cell ID, PCI); (2) the L1 measurement result of the target cell 107; (3) a list of indicators of SSBs and/or CSI-RS resources for mobility of the target cell 107 and the corresponding L1 measurement of the RS resources; and (4) an indicator of RS set and the corresponding L1 measurement of the RS set. The terminal device 103 can report L1 measurements of one or more target cells (including the target cell 107) in one reporting instance.

[0034] In some implementations, the network device 101 can configure the terminal device 103 to report an L1 measurement of SSBs and/or CSI-RS resources for mobility of the target cell 107 through a periodic mechanism, a semi-persistent mechanism or an aperiodic mechanism. The network device 101 can also provide one or more conditions for the terminal device 101 to select target cell 107 for reporting. For example, the terminal device 103 can be requested to report the L1 measurement of the target cells (e.g., can be the target cell 107) that satisfy the condition(s) provided by the network device 101 .

[0035] In some embodiments, the network device 101 can configure the terminal device 103 to report an L1 measurement of SSBs and/or CSI-RS resources for mobility of the target cell 107 through a “UE-initiated” mechanism. The terminal device 103 can report the L1 measurement when a first condition is met. The first condition can be provided by the network device 101 through the configuration information 11.

[0036] In some examples, the first condition can be an event that a measurement metric of one target cell is better (higher or lower in different cases) than a threshold. For example, the first conditions can be (1) the L1-RSRP measurement is larger than a threshold; (2) the L1-RSRQ measurement is larger than a threshold; (3) the L1-RSSI measurement is larger than a threshold; (4) the L1-SINR measurement is larger than a threshold; and (5) the hypothetical BLER measurement is smaller than a threshold.

[0037] In some embodiments, the first condition can be that the measurement metric of a serving cell (e.g., the network device 101) is worse than a threshold. For example, such conditions can be: (1) the L1-RSRP is smaller than a threshold; (2) the L1-RSRQ measurement is smaller than a threshold; (3) the L1-RSSI measurement is smaller than a threshold; (4) the L1-SINR measurement is smaller than a threshold; and (5) the hypothetical BLER measurement is larger than a threshold. In some embodiments, the first condition can be that the measurement metric of one target cell (e.g., the target cell 107) is better than that measurement metric of the serving cell (e.g., the network device 101) by a given amount of offset.

[0038] Fig. 2 is a schematic block diagram of a terminal device 203 (e.g., which can implement the methods discussed herein) in accordance with one or more implementations of the present disclosure. As shown, the terminal device 203 includes a processing unit 210 (e.g., a DSP, a CPU, a GPU, etc.) and a memory 220. The processing unit 210 can be configured to implement instructions that correspond to the methods discussed herein and/or other aspects of the implementations described above. It should be understood that the processor 210 in the implementations of this technology may be an integrated circuit chip and has a signal processing capability. During implementation, the steps in the foregoing method may be implemented by using an integrated logic circuit of hardware in the processor 210 or an instruction in the form of software. The processor 210 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or another programmable logic device, a discrete gate or transistor logic device, and a discrete hardware component. The methods, steps, and logic block diagrams disclosed in the implementations of this technology may be implemented or performed. The general-purpose processor 210 may be a microprocessor, or the processor 210 may be alternatively any conventional processor or the like. The steps in the methods disclosed with reference to the implementations of this technology may be directly performed or completed by a decoding processor implemented as hardware or performed or completed by using a combination of hardware and software modules in a decoding processor. The software module may be located at a random-access memory, a flash memory, a readonly memory, a programmable read-only memory or an electrically erasable programmable memory, a register, or another mature storage medium in this field. The storage medium is located at a memory 220, and the processor 210 reads information in the memory 220 and completes the steps in the foregoing methods in combination with the hardware thereof.

[0039] It may be understood that the memory 220 in the implementations of this technology may be a volatile memory or a non-volatile memory, or may include both a volatile memory and a non-volatile memory. The non-volatile memory may be a readonly memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory. The volatile memory may be a random-access memory (RAM) and is used as an external cache. For exemplary rather than limitative description, many forms of RAMs can be used, and are, for example, a static random-access memory (SRAM), a dynamic random-access memory (DRAM), a synchronous dynamic random-access memory (SDRAM), a double data rate synchronous dynamic random-access memory (DDR SDRAM), an enhanced synchronous dynamic random-access memory (ESDRAM), a synchronous link dynamic random-access memory (SLDRAM), and a direct Rambus randomaccess memory (DR RAM). It should be noted that the memories in the systems and methods described herein are intended to include, but are not limited to, these memories and memories of any other suitable type. In some embodiments, the memory may be a non-transitory computer-readable storage medium that stores instructions capable of execution by a processor.

[0040] Fig. 3 is a flowchart of a method 300 in accordance with one or more implementations of the present disclosure. The method 300 can be implemented by a system (such as the wireless communications system 100). For example, the method 300 may also be implemented by the terminal device 103.

[0041] The method 300 includes, at block 301 , receiving, by a terminal device, a request to perform a measurement on transmission resources for mobility of one or more target cells. At block 303, the method 400 continues by receiving, by the terminal device, configuration information for the transmission resources. The configuration information includes a physical cell ID (PCI) for identifying at least one of the one or more target cells.

[0042] At block 305, the method 300 continues by performing, by the terminal device, the measurement on the transmission resources. At block 307, the method 300 continues by transmitting, by the terminal device, a result of the measurement to a network device. In some embodiments, the transmission resources include Synchronization Signal and Physical Broadcast Channel Blocks (SSBs) resources and/or Channel State Information Reference Signal (CSI- RS) resources.

[0043] In some embodiments, the configuration information includes a configuration of SSB signal, a list of SSB indices, and/ or a configuration of processing window for SSB of the one or more target cells. In some embodiments, the configuration information includes a configuration of CSI-RS of the one or more target cells and/or a configuration of measurement gap associated with the one or more target cells.

[0044] In some embodiments, the measurement is a Layer 1 (L1) measurement or a Layer 2 (L2) measurement. In some embodiments, the L1 measurement includes an L1-RSRP (Reference Signal Received Power) measurement, an L1-RSSI (Received Signal Strength Indicator) measurement, or an L1-RSRQ (Reference Signal Received Quality) measurement. In some embodiments, the L1 measurement includes a hypothetical BLER (Block Error Rate) measurement. In some embodiments, the L1 measurement includes an L1-SINR (Signal-to-lnterference-plus-Noise Ratio) measurement.

[0045] In some embodiments, the method 300 further comprises receiving, by the terminal device, a reporting request from a network device to report a result of the measurement on the transmission resources based on one or more conditions. In some embodiments, the one or more conditions include a threshold associated with a measurement metric for the measurement on the transmission resources. In some embodiments, the one or more conditions include an offset between a result of the measurement on the transmission resources and a threshold associated with a measurement metric for the measurement on the transmission resources.

[0046] In some embodiments, the method 300 further comprises reporting, by the terminal device, the result of the measurement through Uplink Control Information (UCI) signaling. In some embodiments, the method 300 further comprises reporting, by the terminal device, a result of the measurement on the transmission resources periodically or aperiodically.

[0047] Fig. 4 is a flowchart of a method 400 in accordance with one or more implementations of the present disclosure. The method 400 can be implemented by a system (such as the wireless communications system 100). For example, the method 400 may also be implemented by the network device 101.

[0048] The method 400 includes, at block 401 , transmitting, by a base station, a request to perform a measurement on transmission resources for mobility of one or more target cells. At block 403, the method 400 continues by transmitting, by the base station, configuration information for the transmission resources. The configuration information includes a physical cell ID (PCI) for identifying at least one of the one or more target cells.

[0049] In some embodiments, the measurement is a Layer 1 (L1) measurement or a Layer 2 (L2) measurement. The transmission resources can include Synchronization Signal and Physical Broadcast Channel Blocks (SSBs) resources and/or Channel State Information Reference Signal (CSI- RS) resources.

[0050] In some embodiments, the configuration information includes a configuration of SSB signal, a list of SSB indices, a configuration of processing window for SSB of the one or more target cells, a configuration of CSI-RS of the one or more target cells, or a configuration of measurement gap associated with the one or more target cells. At block 405, the method 400 continues by transmitting, by the base station, a reporting request from a network device to report a result of the measurement on the transmission resources based on one or more conditions. ADDITIONAL CONSIDERATIONS

[0051] The above Detailed Description of examples of the disclosed technology is not intended to be exhaustive or to limit the disclosed technology to the precise form disclosed above. While specific examples for the disclosed technology are described above for illustrative purposes, various equivalent modifications are possible within the scope of the described technology, as those skilled in the relevant art will recognize. For example, while processes or blocks are presented in a given order, alternative implementations may perform routines having steps, or employ systems having blocks, in a different order, and some processes or blocks may be deleted, moved, added, subdivided, combined, and/or modified to provide alternative implementations or subcombinations. Each of these processes or blocks may be implemented in a variety of different ways. Also, while processes or blocks are at times shown as being performed in series, these processes or blocks may instead be performed or implemented in parallel, or may be performed at different times. Further, any specific numbers noted herein are only examples; alternative implementations may employ differing values or ranges.

[0052] In the Detailed Description, numerous specific details are set forth to provide a thorough understanding of the presently described technology. In other implementations, the techniques introduced here can be practiced without these specific details. In other instances, well-known features, such as specific functions or routines, are not described in detail in order to avoid unnecessarily obscuring the present disclosure. References in this description to “an implementation/embodiment,” “one implementation/embodiment,” or the like mean that a particular feature, structure, material, or characteristic being described is included in at least one implementation of the described technology. Thus, the appearances of such phrases in this specification do not necessarily all refer to the same implementation/embodiment. On the other hand, such references are not necessarily mutually exclusive either. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more implementations/embodiments. It is to be understood that the various implementations shown in the figures are merely illustrative representations and are not necessarily drawn to scale. [0053] Several details describing structures or processes that are well-known and often associated with communications systems and subsystems, but that can unnecessarily obscure some significant aspects of the disclosed techniques, are not set forth herein for purposes of clarity. Moreover, although the following disclosure sets forth several implementations of different aspects of the present disclosure, several other implementations can have different configurations or different components than those described in this section. Accordingly, the disclosed techniques can have other implementations with additional elements or without several of the elements described below.

[0054] Many implementations or aspects of the technology described herein can take the form of computer- or processor-executable instructions, including routines executed by a programmable computer or processor. Those skilled in the relevant art will appreciate that the described techniques can be practiced on computer or processor systems other than those shown and described below. The techniques described herein can be implemented in a special-purpose computer or data processor that is specifically programmed, configured, or constructed to execute one or more of the computer-executable instructions described below. Accordingly, the terms “computer” and “processor” as generally used herein refer to any data processor. Information handled by these computers and processors can be presented at any suitable display medium. Instructions for executing computer- or processorexecutable tasks can be stored in or on any suitable computer-readable medium, including hardware, firmware, ora combination of hardware and firmware. Instructions can be contained in any suitable memory device, including, for example, a flash drive and/or other suitable medium.

[0055] The term “and/or” in this specification is only an association relationship for describing the associated objects, and indicates that three relationships may exist, for example, A and/or B may indicate the following three cases: A exists separately, both A and B exist, and B exists separately.

[0056] These and other changes can be made to the disclosed technology in light of the above Detailed Description. While the Detailed Description describes certain examples of the disclosed technology, as well as the best mode contemplated, the disclosed technology can be practiced in many ways, no matter how detailed the above description appears in text. Details of the system may vary considerably in its specific implementation, while still being encompassed by the technology disclosed herein. As noted above, particular terminology used when describing certain features or aspects of the disclosed technology should not be taken to imply that the terminology is being redefined herein to be restricted to any specific characteristics, features, or aspects of the disclosed technology with which that terminology is associated. Accordingly, the invention is not limited, except as by the appended claims. In general, the terms used in the following claims should not be construed to limit the disclosed technology to the specific examples disclosed in the specification, unless the above Detailed Description section explicitly defines such terms.

[0057] A person of ordinary skill in the art may be aware that, in combination with the examples described in the implementations disclosed in this specification, units and algorithm steps may be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed by hardware or software depends on particular applications and design constraint conditions of the technical solutions. A person skilled in the art may use different methods to implement the described functions for each particular application, but it should not be considered that the implementation goes beyond the scope of this application.

[0058] Although certain aspects of the invention are presented below in certain claim forms, the applicant contemplates the various aspects of the invention in any number of claim forms. Accordingly, the applicant reserves the right to pursue additional claims after filing this application to pursue such additional claim forms, in either this application or in a continuing application.

Claims

CLAIMS l/We claim:

1. A method comprising: receiving, by a terminal device, a request to perform a measurement on transmission resources for mobility of one or more target cells; receiving, by the terminal device, configuration information for the transmission resources, wherein the configuration information includes a physical cell ID (PCI) for identifying at least one of the one or more target cells; performing, by the terminal device, the measurement on the transmission resources; and transmitting, by the terminal device, a result of the measurement to a network device.

2. The method of claim 1 , wherein the transmission resources include Synchronization Signal and Physical Broadcast Channel Blocks (SSBs) resources and/or Channel State Information Reference Signal (CSI- RS) resources.

3. The method of claim 2, wherein the configuration information includes a configuration of SSB signal, a list of SSB indices, or a configuration of processing window for SSB of the one or more target cells.

4. The method of claim 2, wherein the configuration information includes a configuration of CSI-RS of the one or more target cells.

5. The method of claim 1 , wherein the configuration information includes a configuration of measurement gap associated with the one or more target cells.

6. The method of claim 1 , wherein the measurement is a Layer 1 (L1) measurement.

7. The method of claim 1 , wherein the measurement is a Layer 2 (L2) measurement.

8. The method of claim 6, wherein the L1 measurement includes an L1-RSRP (Reference Signal Received Power) measurement, an L1-RSSI (Received Signal Strength Indicator) measurement, or an L1-RSRQ (Reference Signal Received Quality) measurement.

9. The method of claim 6, wherein the L1 measurement includes a hypothetical BLER (Block Error Rate) measurement.

10. The method of claim 6, wherein the L1 measurement includes an L1-SINR (Signal-to-lnterference-plus-Noise Ratio) measurement.

11. The method of claim 1 , further comprising: receiving, by the terminal device, a reporting request from a network device to report a result of the measurement on the transmission resources based on one or more conditions.

12. The method of claim 11 , wherein the one or more conditions include a threshold associated with a measurement metric for the measurement on the transmission resources.

13. The method of claim 11 , wherein the one or more conditions include an offset between a result of the measurement on the transmission resources and a threshold associated with a measurement metric for the measurement on the transmission resources.

14. The method of claim 11 , further comprising: reporting, by the terminal device, the result of the measurement through Uplink Control Information (UCI) signaling.

15. The method of claim 1 , further comprising: reporting, by the terminal device, a result of the measurement on the transmission resources periodically or aperiodically. 18

16. A method comprising: transmitting, by a base station, a request to perform a measurement on transmission resources for mobility of one or more target cells; transmitting, by the base station, configuration information for the transmission resources, wherein the configuration information includes a physical cell ID (PCI) for identifying at least one of the one or more target cells; and transmitting, by the base station, a reporting request from a network device to report a result of the measurement on the transmission resources based on one or more conditions.

17. The method of claim 16, wherein the measurement is a Layer 1 (L1) measurement or a Layer 2 (L2) measurement.

18. The method of claim 16, wherein the transmission resources include Synchronization Signal and Physical Broadcast Channel Blocks (SSBs) resources and/or Channel State Information Reference Signal (CSI- RS) resources.

19. The method of claim 18, wherein configuration information includes a configuration of SSB signal, a list of SSB indices, a configuration of processing window for SSB of the one or more target cells, a configuration of CSI-RS of the one or more target cells, or a configuration of measurement gap associated with the one or more target cells.

19 A system comprising: a processor; and a memory configured to store instructions, when executed by the processor, to: receive, by a terminal device, a request to perform a Layer- 1 measurement on transmission resources for mobility of one or more target cells; receive, by the terminal device, configuration information for the transmission resources, wherein the configuration information includes a physical cell ID (PCI) for identifying at least one of the one or more target cells; and perform, by the terminal device, the measurement on the transmission resources.