Apparatus and method for layer 1 / layer 2 triggered mobility with event-triggered measurement reporting

Abstract

Methods and apparatuses for Layer 1 / Layer 2 Triggered Mobility (LTM) with event-triggered measurement reporting are provided. The method includes receiving an LTM configuration including an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure; performing, based on the LTM configuration, a measurement on a set of reference signals from one or more candidate cells; determining whether an event for initiating the event-triggered measurement reporting procedure is satisfied; and transmitting a measurement result to a serving cell in response to determining that the event is satisfied.

Description

APPARATUS AND METHOD FOR LAYER 1 / LAYER 2 TRIGGERED MOBILITY WITH EVENT-TRIGGERED MEASUREMENT REPORTING

[0001] The present disclosure is related to wireless communication and, more specifically, to methods and apparatuses for Layer 1 / Layer 2 Triggered Mobility (LTM) with event-triggered measurement reporting.

[0002] Various efforts have been made to improve different aspects of wireless communication for the cellular wireless communication systems, such as the 5thGeneration (5G) New Radio (NR) system, by improving data rate, latency, reliability, and mobility. The 5G NR system is designed to provide flexibility and configurability to optimize network services and types, accommodating various use cases, such as enhanced Mobile Broadband (eMBB), massive Machine-Type Communication (mMTC), and Ultra-Reliable and Low-Latency Communication (URLLC). As the demand for radio access continues to increase, however, there exists a need for further improvements in the art.Summery of Invention

[0003] The present disclosure is related to methods and apparatuses for Layer 1 / Layer 2 Triggered Mobility (LTM) with event-triggered measurement reporting.

[0004] According to a first aspect of the present disclosure, a User Equipment (UE) is provided, the UE including: at least one processor; and at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the UE to: receive a Layer 1 / Layer 2 Triggered Mobility (LTM) configuration including an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure; perform, based on the LTM configuration, a measurement on a set of reference signals from one or more candidate cells; determine whether an event for initiating the event-triggered measurement reporting procedure is satisfied; and transmit a measurement result to a serving cell in response to determining that the event is satisfied.

[0005] In some implementations of the first aspect of the present disclosure, the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to: after determining that the event is satisfied, transmit a Scheduling Request (SR) to the serving cell to request an uplink resource for transmitting the measurement result.

[0006] In some implementations of the first aspect of the present disclosure, the SR is dedicated configured for the event-triggered measurement reporting procedure.

[0007] In some implementations of the first aspect of the present disclosure, the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to: autonomously activate one or more TCI states associated with the set of reference signals in response to determining that the event is satisfied.

[0008] In some implementations of the first aspect of the present disclosure, the event for initiating the event-triggered measurement reporting procedure includes at least one of: a signal quality metric of a reference signal in the set of reference signals exceeding, or falling below, a threshold for a first period of time, or the signal quality metric of the reference signal in the set of reference signals exceeding, or falling below, a signal quality metric of a serving cell reference signal by an offset for a second time period.

[0009] In some implementations of the first aspect of the present disclosure, the LTM configuration further includes at least one timer value specifying the first period of time and the second period of time.

[0010] In some implementations of the first aspect of the present disclosure, the event for initiating the event-triggered measurement reporting procedure corresponds to an LTM configuration identifier.

[0011] In some implementations of the first aspect of the present disclosure, transmitting the measurement result to the serving cell includes: transmitting the measurement result to the serving cell via a Medium Access Control (MAC) Control Element (CE).

[0012] According to a second aspect of the present disclosure, a method performed by a User Equipment (UE) for measurement reporting is provided, the method including: receiving a Layer 1 / Layer 2 Triggered Mobility (LTM) configuration including an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure; performing, based on the LTM configuration, a measurement on a set of reference signals from one or more candidate cells; determining whether an event for initiating the event-triggered measurement reporting procedure is satisfied; and transmitting a measurement result to a serving cell in response to determining that the event is satisfied.

[0013] According to a third aspect of the present disclosure, a network device is provided, the network device including: at least one processor; and at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the network device to: transmit, to a User Equipment (UE), a Layer 1 / Layer 2 Triggered Mobility (LTM) configuration including an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure, where the LTM configuration enables the UE to perform a measurement on a set of reference signals from one or more candidate cells and determine whether an event for initiating the event-triggered measurement reporting procedure is satisfied; and receive, from the UE, a measurement report in response to the UE determining that the event is satisfied.

[0014] In some implementations of the third aspect of the present disclosure, the one or more computer-executable instructions, when executed by the at least one processor, further cause the network device to: receive, from the UE, a Scheduling Request (SR) requesting an uplink resource for transmitting the measurement report.

[0015] In some implementations of the third aspect of the present disclosure, the SR is dedicated configured for the event-triggered measurement reporting procedure.

[0016] In some implementations of the third aspect of the present disclosure, the event for initiating the event-triggered measurement reporting procedure includes at least one of: a signal quality metric of a reference signal in the set of reference signals exceeding, or falling below, a threshold for a first period of time; or the signal quality metric of the reference signal in the set of reference signals exceeding, or falling below, a signal quality metric of a serving cell reference signal by an offset for a second time period.

[0017] In some implementations of the third aspect of the present disclosure, the LTM configuration further includes at least one timer value specifying the first period of time and the second period of time.

[0018] In some implementations of the third aspect of the present disclosure, receiving the measurement report from the UE includes: receiving the measurement report via a Medium Access Control (MAC) Control Element (CE).

[0019] Aspects of the present disclosure are best understood from the following detailed disclosure when read with the accompanying drawings. Various features are not drawn to scale. Dimensions of various features may be arbitrarily increased or reduced for clarity of discussion.

[0020] FIG. 1 is a flowchart illustrating a method / process for measurement reporting in a wireless communication system, according to an example implementation of the present disclosure.

[0021] FIG. 2 is a flowchart illustrating a method / process for a network device in a wireless communication system, according to an example implementation of the present disclosure.

[0022] FIG. 3 is a block diagram illustrating node for wireless communications, in accordance with various aspects of the present disclosure.

[0023] Some of the abbreviations in the present application are defined as follows and, unless otherwise specified, the abbreviations have the following meanings: Abbreviation　　　　　　　　Full name 3GPP　　　　　　　　3rd Generation Partnership Project 5G　　　　　　　　　　　　5th Generation 5GC　　　　　　　　　　　　5G Core ACK　　　　　　　　Acknowledgement AN-PDB　　　　　　　　Access Network Packet Delay Budget ARFCN　　　　　　　　Absolute Radio Frequency Channel Number AS　　　　　　　　　　　　Access Stratum ASN.1　　　　　　　　Abstract Syntax Notation One BFRQ　　　　　　　　Beam Failure Recovery Request BS　　　　　　　　　　　　Base Station BSR　　　　　　　　　　　　Buffer Status Report BWP　　　　　　　　Bandwidth Part C-RNTI　　　　　　　　Cell Radio Network Temporary Identifier CA　　　　　　　　　　　　Carrier Aggregation CAG　　　　　　　　Closed Access Group CB　　　　　　　　　　　　Codebook-Based CC　　　　　　　　　　　　Component Carrier CG　　　　　　　　　　　　Configured Grant CIF　　　　　　　　　　　　Carrier Indicator Field CJT　　　　　　　　　　　　Coherent Joint Transmission CN　　　　　　　　　　　　Core Network CN-PDB　　　　　　　　Core Network Packet Delay Budget CORESET　　　　Control Resource Set CPE　　　　　　　　　　　　Customer Premises Equipment CQI　　　　　　　　　　　　Channel Quality Indication CRC　　　　　　　　Cyclic Redundancy Check CSI　　　　　　　　　　　　Channel State Information CSI-RS　　　　　　　　Channel State Information Reference Signal CS-RNTI　　　　　　　　Configured Scheduling Radio Network Temporary Identifier CSS　　　　　　　　　　　　Common Search Space CU　　　　　　　　　　　　Central Unit DAPS　　　　　　　　Dual Active Protocol Stack DC　　　　　　　　　　　　Dual Connectivity DCI　　　　　　　　　　　　Downlink Control Information DG　　　　　　　　　　　　Dynamic Grant DI　　　　　　　　　　　　Delay Information DL　　　　　　　　　　　　Downlink DL-SCH　　　　　　　　Downlink Shared Channel DMRS　　　　　　　　Demodulation Reference Signal DR　　　　　　　　　　　　Delay Report DRB　　　　　　　　Data Radio Bearer DRX　　　　　　　　Discontinuous Reception DTCH　　　　　　　　Dedicated Traffic Channel DTX　　　　　　　　Discontinuous Transmission DU　　　　　　　　　　　　Distributed Unit ETSI　　　　　　　　European Telecommunications Standards Institute E-UTRA　　　　　　　　Evolved Universal Terrestrial Radio Access EN-DC　　　　　　　　E-UTRA NR Dual Connectivity EPC　　　　　　　　　　　　Evolved Packet Core eMBB　　　　　　　　Enhanced Mobile BroadBand eMTC　　　　　　　　Enhanced Machine Type Communication eNB　　　　　　　　　　　　Evolved Node B FDD　　　　　　　　Frequency Division Duplexing FDRA　　　　　　　　Frequency Domain Resource Allocation FR　　　　　　　　　　　　Frequency Range FR1　　　　　　　　　　　　Frequency Range 1 FR2　　　　　　　　　　　　Frequency Range 2 FWA　　　　　　　　Fixed Wireless Access GEO　　　　　　　　Geostationary Equatorial Orbit gNB　　　　　　　　　　　　Next Generation Node B GNSS　　　　　　　　Global Navigation Satellite System GPS　　　　　　　　　　　　Global Positioning System GW　　　　　　　　　　　　Gateway HARQ　　　　　　　　Hybrid Automatic Repeat Request HO　　　　　　　　　　　　Handover FR　　　　　　　　　　　　Frequency Range IAB　　　　　　　　　　　　Integrated Access and Backhaul ID　　　　　　　　　　　　Identity IE　　　　　　　　　　　　Information Element IoT　　　　　　　　　　　　Internet of Things ITS　　　　　　　　　　　　Intelligent Transportation System ITU　　　　　　　　　　　　International Telecommunication Union L1　　　　　　　　　　　　Layer 1 L2　　　　　　　　　　　　Layer 2 L3　　　　　　　　　　　　Layer 3 LAN　　　　　　　　Local Area Network LCH　　　　　　　　Logical Channel LCID　　　　　　　　Logical Channel Identity LEO　　　　　　　　　　　　Low Earth Orbit LTE 　　　　　　　　Long Term Evolution LTM　　　　　　　　Layer 1 / Layer 2 Triggered Mobility LSB　　　　　　　　　　　　Least Significant Bit MAC　　　　　　　　Medium Access Control MAC CE　　　　　　　　MAC Control Element MCG　　　　　　　　Master Cell Group MCS　　　　　　　　Modulation and Coding Scheme MEO　　　　　　　　Medium Earth Orbit MIB　　　　　　　　　　　　Master Information Block MIMO　　　　　　　　Multi-Input Multi-Output mMTC　　　　　　　　Massive Machine Type Communications MN　　　　　　　　　　　　Master Node MSG　　　　　　　　Message MTC　　　　　　　　Machine Type Communication NACK　　　　　　　　Negative Acknowledgement NAS　　　　　　　　Non-Access Stratum NB-IoT　　　　　　　　Narrow Band Internet of Things NCB　　　　　　　　Non-Codebook-Based NDI　　　　　　　　　　　　New Data Indicator NES　　　　　　　　　　　　Network Energy Saving NPN　　　　　　　　Non-Public Network NR　　　　　　　　　　　　New Radio NR-U　　　　　　　　NR Unlicensed NTN　　　　　　　　Non-Terrestrial Network OD-SIB1　　　　　　　　On-Demand System Information Block 1 OD-SSB　　　　　　　　On-Demand Synchronization Signal Block PA　　　　　　　　　　　　Power Amplifier PBCH　　　　　　　　Physical Broadcast Channel PCell　　　　　　　　Primary Cell PCI　　　　　　　　　　　　Physical Cell Identity PDB　　　　　　　　　　　　Packet Delay Budget PDCCH　　　　　　　　Physical Downlink Control Channel PDCP　　　　　　　　Packet Data Convergence Protocol PDSCH　　　　　　　　Physical Downlink Shared Channel PDU　　　　　　　　Protocol Data Unit PHY　　　　　　　　Physical PLMN 　　　　　　　　Public Land Mobile Network PMI　　　　　　　　　　　　Precoding Matrix indicator PNI-NPN　　　　　　　　Public Network Integrated Non-Public Network PRACH　　　　　　　　Physical Random Access Channel PSDB　　　　　　　　PDU Set Delay Budget PUCCH　　　　　　　　Physical Uplink Control Channel PUSCH　　　　　　　　Physical Uplink Shared Channel QCL　　　　　　　　Quasi-CoLocation QoS　　　　　　　　　　　　Quality of Service RA　　　　　　　　　　　　Random Access RACH　　　　　　　　Random Access Channel RAN　　　　　　　　Radio Access Network RAR　　　　　　　　Random Access Response RAT　　　　　　　　　　　　Radio Access Technology RE　　　　　　　　　　　　Resource Element Rel-15　　　　　　　　Release 15 Rel-16　　　　　　　　Release 16 Rel-17 　　　　　　　　Release 17 Rel-18　　　　　　　　Release 18 RF　　　　　　　　　　　　Radio Frequency RLC　　　　　　　　　　　　Radio Link Control RS　　　　　　　　　　　　Reference Signal RLF　　　　　　　　　　　　Radio Link Failure RSTD　　　　　　　　Reference Signal Time Difference Measurement RNTI　　　　　　　　Radio Network Temporary Identifier RO　　　　　　　　　　　　RACH Occasion RRC　　　　　　　　Radio Resource Control RRM　　　　　　　　Radio Resource Management RS　　　　　　　　　　　　Reference Signal RSRP　　　　　　　　Reference Signal Received Power RSRQ　　　　　　　　Reference Signal Receiving Quality RV　　　　　　　　　　　　Redundancy Version RX　　　　　　　　　　　　Reception SCell　　　　　　　　Secondary Cell SCG　　　　　　　　　　　　Secondary Cell Group SDT　　　　　　　　　　　　Small Data Transmission SI　　　　　　　　　　　　System Information SIB　　　　　　　　　　　　System Information Block SL　　　　　　　　　　　　Sidelink SLIV　　　　　　　　Start and Length Indicator Value SN　　　　　　　　　　　　Secondary Node SNPN　　　　　　　　Stand-alone Non-Public Network SpCell　　　　　　　　Special Cell SR　　　　　　　　　　　　Scheduling Request SRB　　　　　　　　　　　　Signaling Radio Bearer SRS　　　　　　　　　　　　Sounding Reference Signal SRI　　　　　　　　　　　　SRS Resource Indicator SSB　　　　　　　　　　　　Synchronization Signal Block SSS　　　　　　　　　　　　Secondary Synchronization Signal SUL　　　　　　　　　　　　Supplementary Uplink TA　　　　　　　　　　　　Timing Advance TAG　　　　　　　　　　　　Timing Advance Group TAT 　　　　　　　　Time Alignment Timer TAU　　　　　　　　　　　　Tracking Area Update TB　　　　　　　　　　　　Transport Block TCI　　　　　　　　　　　　Transmission Configuration Indication TDD　　　　　　　　Time Division Duplexing TDRA　　　　　　　　Time Domain Resource Allocation TN　　　　　　　　　　　　Terrestrial Network TPC　　　　　　　　　　　　Transmission Power Control TPMI　　　　　　　　Transmit Precoder Matrix Indication TRP　　　　　　　　　　　　Transmission Reception Point TRS 　　　　　　　　Tracking Reference Signal TRX　　　　　　　　Transmission / Reception TS　　　　　　　　　　　　Technical Specification TX　　　　　　　　　　　　Transmission UCI　　　　　　　　　　　　Uplink Control Information UE　　　　　　　　　　　　User Equipment UL　　　　　　　　　　　　Uplink UL-CG　　　　　　　　Uplink-Configured Grant UPF　　　　　　　　　　　　User Plane Function URLLC　　　　　　　　Ultra-Reliable and Low-Latency Communications USIM　　　　　　　　Universal Subscriber Identity Module USS 　　　　　　　　UE-specific Search Space UTC　　　　　　　　Coordinated Universal Time V2X　　　　　　　　　　　　Vehicle-to-Everything VSAT　　　　　　　　Very Small Aperture Terminal WUS　　　　　　　　Wake-Up Signaling XR　　　　　　　　　　　　Extended Reality

[0024] The following contains specific information related to implementations of the present disclosure. The drawings and their accompanying detailed disclosure are merely directed to implementations. However, the present disclosure is not limited to these implementations. Other variations and implementations of the present disclosure will be obvious to those skilled in the art.

[0025] Unless noted otherwise, like or corresponding elements among the drawings may be indicated by like or corresponding reference numerals. Moreover, the drawings and illustrations in the present disclosure are generally not to scale and are not intended to correspond to actual relative dimensions.

[0026] For consistency and ease of understanding, like features may be identified (although, in some examples, not illustrated) by the same numerals in the drawings. However, the features in different implementations may be different in other respects and shall not be narrowly confined to what is illustrated in the drawings.

[0027] References to “one implementation,” “an implementation,” “example implementation,” “various implementations,” “some implementations,” “implementations of the present application,” etc., may indicate that the implementation(s) of the present application so described may include a particular feature, structure, or characteristic, but not every possible implementation of the present application necessarily includes the particular feature, structure, or characteristic. Further, repeated use of the phrase “in one implementation,” or “in an example implementation,” “an implementation,” do not necessarily refer to the same implementation, although they may. Moreover, any use of phrases like “implementations” in connection with “the present application” are never meant to characterize that all implementations of the present application must include the particular feature, structure, or characteristic, and should instead be understood to mean “at least some implementations of the present application” includes the stated particular feature, structure, or characteristic.

[0028] The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series, and the equivalent.

[0029] The expression “at least one of A, B and C” or “at least one of the following: A, B and C” means “only A, or only B, or only C, or any combination of A, B and C.” The terms “system” and “network” may be used interchangeably. The term “and / or” is only an association relationship for describing associated objects and represents that three relationships may exist such that A and / or B may indicate that A exists alone, A and B exist at the same time, or B exists alone. The character “ / ” generally represents that the associated objects are in an “or” relationship.

[0030] For the purposes of explanation and non-limitation, specific details, such as functional entities, techniques, protocols, and standards, are set forth for providing an understanding of the disclosed technology. In other examples, detailed disclosure of well-known methods, technologies, systems, and architectures are omitted so as not to obscure the present disclosure with unnecessary details.

[0031] Persons skilled in the art will immediately recognize that any network function(s) or algorithm(s) disclosed may be implemented by hardware, software, or a combination of software and hardware. Disclosed functions may correspond to modules which may be software, hardware, firmware, or any combination thereof.

[0032] A software implementation may include computer executable instructions stored on a computer-readable medium, such as memory or other type of storage devices. One or more microprocessors or general-purpose computers with communication processing capability may be programmed with corresponding executable instructions and perform the disclosed network function(s) or algorithm(s).

[0033] The microprocessors or general-purpose computers may include Application-Specific Integrated Circuits (ASICs), programmable logic arrays, and / or one or more Digital Signal Processor (DSPs). Although some of the disclosed implementations are oriented to software installed and executing on computer hardware, alternative implementations implemented as firmware, as hardware, or as a combination of hardware and software are well within the scope of the present disclosure. The computer-readable medium includes but is not limited to Random Access Memory (RAM), Read Only Memory (ROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash memory, Compact Disc Read-Only Memory (CD-ROM), magnetic cassettes, magnetic tape, magnetic disk storage, or any other equivalent medium capable of storing computer-readable instructions.

[0034] A radio communication network architecture such as a Long-Term Evolution (LTE) system, an LTE-Advanced (LTE-A) system, an LTE-Advanced Pro system, or a 5G NR Radio Access Network (RAN) typically includes at least one base station (BS), at least one UE, and one or more optional network elements that provide connection within a network. The UE communicates with the network such as a Core Network (CN), an Evolved Packet Core (EPC) network, an Evolved Universal Terrestrial RAN (E-UTRAN), a 5G Core (5GC), or an internet via a RAN established by one or more BSs.

[0035] A UE may include, but is not limited to, a mobile station, a mobile terminal or device, or a user communication radio terminal. The UE may be a portable radio equipment that includes, but is not limited to, a mobile phone, a tablet, a wearable device, a sensor, a vehicle, or a Personal Digital Assistant (PDA) with wireless communication capability. The UE is configured to receive and transmit signals over an air interface to one or more cells in a RAN. A UE may be referred to as a PHY / MAC / RLC / PDCP / SDAP entity. The PHY / MAC / RLC / PDCP / SDAP entity may be referred to as the UE.

[0036] The BS may be configured to provide communication services according to at least a Radio Access Technology (RAT) such as Worldwide Interoperability for Microwave Access (WiMAX), Global System for Mobile communications (GSM) that is often referred to as 2G, GSM Enhanced Data rates for GSM Evolution (EDGE) RAN (GERAN), General Packet Radio Service (GPRS), Universal Mobile Telecommunication System (UMTS) that is often referred to as 3G based on basic wideband-code division multiple access (W-CDMA), high-speed packet access (HSPA), LTE, LTE-A, evolved LTE (eLTE) that is LTE connected to 5GC, NR (often referred to as 5G), and / or LTE-A Pro. However, the scope of the present disclosure is not limited to these protocols.

[0037] The BS may include, but is not limited to, a node B (NB) in the UMTS, an evolved node B (eNB) in LTE or LTE-A, a radio network controller (RNC) in UMTS, a BS controller (BSC) in the GSM / GERAN, an ng-eNB in an Evolved Universal Terrestrial Radio Access (E-UTRA) BS in connection with 5GC, a next generation Node B (gNB) in the 5G-RAN, or any other apparatus capable of controlling radio communication and managing radio resources within a cell. The BS may serve one or more UEs via a radio interface.

[0038] The BS may be operable to provide radio coverage to a specific geographical area using multiple cells forming the RAN. The BS may support the operations of the cells. Each cell may be operable to provide services to at least one UE within its radio coverage.

[0039] Each cell (often referred to as a serving cell) may provide services to serve one or more UEs within its radio coverage, such that each cell schedules the DL (and optionally UL resources) to at least one UE within its radio coverage for DL (and optionally UL packet transmissions from the UE). The BS may communicate with one or more UEs in the radio communication system via the plurality of cells.

[0040] A cell may allocate sidelink (SL) resources for supporting the Proximity Service (ProSe) or Vehicle to Everything (V2X) service. Each cell may have overlapped coverage areas with other cells.

[0041] In Multi-RAT Dual Connectivity (MR-DC) cases, the primary cell of a Master Cell Group (MCG) or a Secondary Cell Group (SCG) may be referred to as a Special Cell (SpCell). A Primary Cell (PCell) may include the SpCell of an MCG. A Primary SCG Cell (PSCell) may include the SpCell of an SCG. MCG may include a group of serving cells associated with the Master Node (MN), including the SpCell and optionally one or more Secondary Cells (SCells). An SCG may include a group of serving cells associated with the Secondary Node (SN), including the SpCell and optionally one or more SCells.

[0042] As described above, the frame structure for NR supports flexible configurations for accommodating various next generation (e.g., 5G) communication requirements, such as Enhanced Mobile Broadband (eMBB), Massive Machine Type Communication (mMTC), and Ultra-Reliable and Low-Latency Communication (URLLC), while fulfilling high reliability, high data rate, and low latency requirements. The Orthogonal Frequency-Division Multiplexing (OFDM) technology in the 3GPP may serve as a baseline for an NR waveform. The scalable OFDM numerology, such as adaptive sub-carrier spacing, channel bandwidth, and Cyclic Prefix (CP), may also be used.

[0043] Two coding schemes may be considered for NR, specifically Low-Density Parity-Check (LDPC) code and Polar Code. The coding scheme adaption may be configured based on channel conditions and / or service applications.

[0044] At least the DL transmission data, a guard period, and UL transmission data should be included in a transmission time interval (TTI) of a single NR frame. The respective portions of the DL transmission data, the guard period, and the UL transmission data should also be configurable based on, for example, the network dynamics of NR. SL resources may also be provided in an NR frame to support ProSe services or V2X services.

[0045] Any two or more of the following paragraphs, (sub)-bullets, points, actions, behaviors, terms, or claims described in the present disclosure may be combined logically, reasonably, and properly to form a specific method.

[0046] Any sentence, paragraph, (sub)-bullet, point, action, behaviors, terms, or claims described in the present disclosure may be implemented independently and separately to form a specific method.

[0047] Dependency, e.g., “based on”, “more specifically”, “preferably”, “in one embodiment”, “in some implementations”, etc., in the present disclosure is just one possible example which would not restrict the specific method.

[0048] “A and / or B” in the present disclosure may refer to either A or B, both A and B, or at least one of A and B.

[0049] In this disclosure, “X / Y” may encompass the meanings of “X or Y,” “X and Y,” and “X and / or Y,” as indicated by two or more of the sentences, paragraphs, sub-bullets, points, actions, behaviors, terms, alternatives, aspects, examples, embodiments, or claims described in the following invention(s).

[0050] One aspect of the present disclosure may be applied in various contexts, including communications, communication equipment (such as mobile telephone apparatus, base station apparatus, wireless LAN apparatus, and / or sensor devices), integrated circuits (such as communication chips), and software programs, among others.

[0051] The terms “an antenna port” and “antenna ports,” as discussed in the present disclosure, may refer to “an antenna port used for transmission of PUSCH(s) / PUCCH(s)” and “antenna ports used for transmission of PUSCH(s) / PUCCH(s),” respectively.

[0052] Some of the terms, definitions, and / or abbreviations included in the present disclosure may either be sourced from existing documents (such as those from ETSI, ITU, or other sources) or may be newly created by experts from the 3GPP whenever there was a need for a precise vocabulary.

[0053] Examples of some selected terms in the present disclosure are provided as follows.

[0054] Antenna Panel: A conceptual term for a UE antenna implementation. It may be assumed that a panel may be an operational unit for controlling a transmit spatial filter (beam). A panel may typically include multiple antenna elements. In some implementations, a beam may be formed by a panel, and in order to form two beams simultaneously, two panels may be needed. Such simultaneous beamforming by multiple panels may be subject to the UE capability. A similar definition for “panel” may be applicable by applying spatial receiving filtering characteristics.

[0055] Beam: A beam may include a spatial (domain) filtering. In one example, the spatial filtering may be applied in the analog domain by adjusting a phase and / or amplitude of the signal before being transmitted by a corresponding antenna element. In another example, the spatial filtering may be applied in the digital domain by the Multi-Input Multi-Output (MIMO) technique in the wireless communication system. For example, “a UE made a PUSCH transmission by using a specific beam” may mean that the UE made the PUSCH transmission by using the specific spatial / digital domain filter. The “beam” may also be, but is not limited to be, represented as an antenna, an antenna port, an antenna element, a group of antennas, a group of antenna ports, or a group of antenna elements. The beam may also be formed by a certain reference signal resource. In short, the beam may be equivalent to a spatial domain filter through which the EM wave is radiated. Beam information may include details about the selected or utilized beam or spatial filter. In some implementations, the individual beams (e.g., spatial filters) may be used to transmit individual reference signals. Consequently, a beam or beam information may be represented by one or more reference signal resource indices.

[0056] DCI: DCI may include downlink control information, and there may be various DCI formats used in a PDCCH. The DCI format may be a predefined format in which the downlink control information may be packed / formed and transmitted in a PDCCH.

[0057] TCI state: a TCI state may include parameters for configuring a QCL relationship between one or more DL reference signals and a target reference signal set. For example, a target reference signal set may be the DMRS ports of a PDSCH or a PDCCH.

[0058] HARQ: A functionality that ensures the delivery between peer entities at Layer 1 (e.g., Physical Layer). A single HARQ process may support one Transport Block (TB) when the physical layer is not configured for the downlink / uplink spatial multiplexing, and when the physical layer is configured for downlink / uplink spatial multiplexing, a single HARQ process may support one or more TBs. There may be one HARQ entity per serving cell. Each HARQ entity may support a parallel (number of) DL and UL HARQ process.

[0059] Network (NW): The NW may be a network node, a TRP, a cell, an eNB, a gNB, and / or a base station. In some implementations, the cell may be a SpCell (Special Cell), a PCell, a PSCell, and / or an SCell.

[0060] Serving Cell: A serving cell may be a PCell (Primary Cell), a PSCell, or an SCell (Secondary Cell). The serving cell may be an activated or a deactivated serving cell.

[0061] Special Cell (SpCell): For Dual Connectivity operation, the term Special Cell may refer to the PCell of the MCG (Master Cell Group) or the PSCell of the SCG (Secondary Cell Group) depending on if the MAC entity is associated to the MCG or the SCG, respectively. Otherwise, the term Special Cell may refer to the PCell. A Special Cell may support PUCCH (Physical Uplink Control CHannel) transmission and contention-based Random Access, and may be always activated.

[0062] In the present disclosure, although the term “gNB” may have been used throughout the document, it should be understood that the term “gNB” may be replaced by any other type of BS (e.g., an eNB). Additionally, unless specifically noted otherwise, the terms “SSB” and “OD-SSB” may be used interchangeably in the present disclosure.

[0063] A Synchronization Signal Block (SSB) may include, or consist of, a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH) payload. The PSS and the SSS may be pseudo-random sequences with a length equal to 127. The PBCH payload may include a Master Information Block (MIB) (24 bits in total) and an 8 bits payload. The information in the MIB may include: a System Frame Number (SFN), a sub-carrier space (SCS), a DeModulation Reference Signal (DMRS) configuration, an Access Control, and mainly a configuration for a System Information Block 1 (SIB1) acquisition. By decoding the PSS and the SSS, a User Equipment (UE) may be able to identify a Physical Cell Identity (PCI) for a corresponding cell and may determine the symbol boundary. Consequently, with the decoding of the PBCH, the UE may determine the frame boundary and may try to decode the Physical Downlink Control Channel (PDCCH).

[0064] LTM may be a procedure in which a network (NW) may receive L1 measurement reports from a UE, and based on the L1 measurement reports, the gNB may change the serving cell of the UE by a cell switch command signaled via a MAC CE. The cell switch command may indicate an LTM candidate cell configuration that the gNB previously prepared and provided to the UE through RRC signaling. Then the UE may switch to the target cell according to the cell switch command. The LTM procedure may be used to reduce the mobility latency.

[0065] In LTM, an event triggered L1 measurement report may be considered as an enhancement to reduce measurement report delay. The UE may not need to wait for the configured reporting resource, but may trigger the reporting by the UE itself. Introducing a new design for an event triggered L1 measurement report may be discussed. However, if a new mechanism for an event triggered L1 measurement report is introduced, and the UE is also configured with an LTM measurement report, the configuration may waste UE power to report both the event triggered L1 measurement report and the LTM measurement report.

[0066] Thus, in this disclosure, methods are provided for handling these two kinds of measurement reports so that the NW may still receive a measurement report and the UE may not report too frequently.

[0067] Moreover, if an event triggered L1 measurement report is introduced, there may be more measurement report operations that the UE may perform. For example, the UE may simultaneously activate and indicate one or more TCI states corresponding to one or more reference signals which are reported in the event triggered L1 measurement. With this design, the UE may not need to additionally receive a MAC CE for activating TCI states and the NW also may not have to transmit a MAC CE for activating TCI states. In this case, the design may save power for both the UE and the NW.

[0068] Event triggered L1 measurement report and LTM measurement report

[0069] In some implementations, the UE may transmit an event triggered L1 measurement report on a resource of the LTM measurement report. For example, the resource may be a PUCCH, a CG PUSCH, or a DG PUSCH. In some implementations, the UE may transmit an event triggered L1 measurement report and may not transmit a legacy LTM measurement report on a resource of the LTM measurement report. In some implementations, the UE may multiplex an event triggered L1 measurement report and a legacy LTM measurement report on a resource of the LTM measurement report.

[0070] In some implementations, the event triggered L1 measurement report may be configured by the LTM-EventTriggered-ReportConfig IE under (e.g., included in) the CSI-MeasConfig IE or by the LTM-CSI-ReportConfig IE under the CSI-MeasConfig IE. In some implementations, the resource for event triggered L1 measurement may be configured by the LTM-CSI-ResourceConfig IE. In some implementations, the report type of the event triggered L1 measurement report may be configured as (or set to) ‘eventTriggered’ in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE. In some implementations, the report type of the event triggered L1 measurement report may be configured in the ltm-EventTriggered-ReportConfigType IE in the LTM-EventTriggered-ReportConfig IE, which may be set to aperiodic, semi-persistent on PUCCH, semi-persistent on PUSCH, or periodic.

[0071] In some implementations, if the event-triggered CSI report is associated with a UL resource, the UE may consider using the associated UL resource to transmit the event-triggered CSI report. In some implementations, if the event-triggered CSI report is not associated with any UL resource, the UE may consider using the UL resources associated with the LTM measurement report. In some implementations, the UL resource may be periodic on PUCCH, semi-persistent on PUCCH, semi-persistent on PUSCH, or aperiodic on PUSCH.

[0072] In some implementations, the UE may consider that an event-triggered CSI report is associated with a UL resource if the event-triggered CSI report configuration and the UL resource configuration are configured in the same IE, or if the event-triggered CSI report configuration contains the UL resource configuration. In some implementations, the UE may consider that an LTM measurement report is associated with a UL resource if the LTM measurement report configuration contains the UL resource configuration.

[0073] In some implementations, the UE may transmit an event triggered L1 measurement report on the nearest, latest, or first available resource that fulfills the timeline condition of the LTM measurement report after the event or condition is satisfied.

[0074] In some implementations, when or after the event or condition is satisfied, the UE may transmit an SR or a UL notification to the NW and may transmit an event triggered L1 measurement report on the nearest resource of the LTM measurement report. More specifically, the SR may be a specific SR for event-triggered L1 measurement. More specifically, the SR may be transmitted for informing the NW of the presence of an event triggered L1 measurement report. The SR may be dedicated configured for an event triggered L1 measurement report. The SR may be configured without being associated with a logical channel. The SR may be different from the link recovery request. If the NW receives the SR, the UE may transmit the event triggered L1 measurement report on the nearest, latest, or first available resource that fulfills the timeline condition of the LTM measurement report resource. The specific SR for the event-triggered L1 measurement configuration may be configured by RRC. In some implementations, if the NW does not receive the SR and the UE transmits an event triggered L1 measurement report on the nearest, latest, or first available resource of the LTM measurement report, the NW may not decode the event triggered L1 measurement report successfully. The NW may transmit a UL grant (or DCI) scheduling a UL resource to the UE, and the UE may transmit the event triggered L1 measurement report on the UL resource. More specifically, the LTM measurement report type may be configured as event triggered, periodic, semi-persistent on PUCCH, semi-persistent on PUSCH, or aperiodic on PUSCH. More specifically, for periodic, semipersistent-On-PUCCH (semipersistentOnPUCCH), or semi-Persistent-On-PUSCH (semiPersistentOnPUSCH) CSI reporting, the configured periodicity and slot offset may apply in the numerology of the UL BWP in which the CSI report is configured to be transmitted on.

[0075] In some implementations, if the LTM measurement report type is configured as aperiodic and eventTriggered, and the UE receives DCI triggering a triggering state for the LTM measurement report, the UE may transmit the event triggered L1 measurement report on the LTM measurement report resource indicated by the DCI, after the event or condition is satisfied. More specifically, the triggering state may indicate one or more resource sets and associated report configuration. More specifically, the UE may perform aperiodic CSI reporting using PUSCH on a serving cell upon successful decoding of the DCI which triggers an aperiodic CSI trigger state.

[0076] In some implementations, if the LTM measurement report type is configured as aperiodic and the UE receives DCI indicating a triggering state for the LTM measurement report, the UE may multiplex the event triggered L1 measurement report on the LTM measurement report resource indicated by the DCI, after the event or condition is satisfied. In some implementations, if the LTM measurement report type is configured as aperiodic and the UE does not receive DCI triggering a triggering state for the LTM measurement report when or after the event or condition is satisfied and the SR counter (e.g., the value of the SR_COUNTER IE) is less than the value sr_TransMax, the UE may transmit an SR to the NW and may receive DCI scheduling a resource for the event triggered L1 measurement report.

[0077] In some implementations, if the LTM measurement report type is configured as aperiodic and an event triggered L1 measurement report is configured as ‘eventTriggered’ in the ltm-ReportConfigType IE in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType IE in the LTM-EventTriggered-ReportConfig IE, and the UE receives DCI triggering a triggering state for the LTM measurement report, the UE may transmit the event triggered L1 measurement report on the LTM measurement report resource indicated by the DCI, after the event or condition is satisfied. In some implementations, the UE may transmit the event triggered L1 measurement report on the LTM measurement report resource indicated by the latest DCI after or when the event or condition is satisfied. In some implementations, if the UE transmits an SR and the UE does not receive DCI triggering a triggering state for the LTM measurement report when or after the event or condition is satisfied and the value of the SR_COUNTER IE is less than the value sr_TransMax, the UE may transmit an SR to the NW and may receive DCI scheduling a resource for the event triggered L1 measurement report.

[0078] More specifically, the UE may transmit N measurement results for SSBs, CSI-RS, or TRS for each cell among M cells on the LTM measurement report resource indicated by the DCI, when at least one of the N×M measurement results for SSBs, CSI-RS, or TRS satisfies the event or condition. More specifically, N may be the number of reference signals such as SSB, CSI-RS, or TRS to be reported, and M may be the number of candidate or serving cells configured by the NW. More specifically, the value N and M may be included in a report content, such as the reportContent IE, configured by the NW for LTM measurement results.

[0079] More specifically, the UE may transmit one or more measurement results for SSBs, CSI-RS, or TRS for one or more candidate cells on the LTM measurement report resources indicated by the DCI, when the one or more measurement results for SSBs, CSI-RS, or TRS satisfy the event or condition. More specifically, if the payload or information bits of the LTM measurement report cannot fit into the resource used for the event triggered L1 measurement report, the UE may truncate a part of the event triggered L1 measurement report or prepend zeros or perform zero-padding to the event triggered L1 measurement report to match the resources used for the LTM measurement report.

[0080] In some implementations, if the UE transmits an SR or a UL notification, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. More specifically, the SR may be transmitted for informing the NW of the presence of an event triggered L1 measurement report. The SR may be dedicated configured for an event triggered L1 measurement report. The SR may be configured without being associated with a logical channel. The SR may be different from the link recovery request. In some implementations, after or when the UE transmits the SR, the UE may expect that performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report may be skipped in a specific duration. More specifically, the specific duration may be configured by the NW.

[0081] In some implementations, if a UE receives a UL grant associated with a first characteristic, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The first characteristic may correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with (or configured for) the UE event triggered L1 measurement report. In some implementations, if a UE receives a UL grant associated with a second characteristic, the UE may not skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The second characteristic may not correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with (or configured for) the UE event triggered L1 measurement report.

[0082] More specifically, if the LTM measurement report type is configured as semi-persistent on PUSCH and eventTriggered, and the UE receives a DCI scrambled by SP-CSI-RNTI activating a triggering state for the LTM measurement report, the UE may transmit the event triggered L1 measurement report on the nearest LTM measurement report resource activated by the DCI, after the event or condition is satisfied. More specifically, if the LTM measurement report type is configured as semi-persistent on PUSCH and the UE receives a DCI scrambled by SP-CSI-RNTI activating a triggering state for the LTM measurement report, the UE may multiplex the event triggered L1 measurement report and the LTM measurement report on the nearest LTM measurement report resource activated by the DCI, after the event or condition is satisfied.

[0083] In some implementations, if the LTM measurement report type is configured as semi-persistent on PUSCH and an event triggered L1 measurement report is configured, such as eventTriggered in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType in the LTM-EventTriggered-ReportConfig IE, and the UE receives a DCI scrambled by SP-CSI-RNTI activating a triggering state for the LTM measurement report, the UE may transmit the event triggered L1 measurement report on the nearest LTM measurement report resource activated by the DCI, after the event or condition is satisfied. In some implementations, the UE may transmit the event triggered L1 measurement report on the latest LTM measurement report resource activated by the DCI, after or when the event or condition is satisfied. In some implementations, the UE may transmit the event triggered L1 measurement report on the first LTM measurement report resource activated by the DCI, after or when the event or condition is satisfied.

[0084] More specifically, the UE may transmit N measurement results for SSBs, CSI-RS, or TRS for each cell among M cells on the nearest LTM measurement report resource activated by the DCI, when at least one of the N×M measurement results for SSBs, CSI-RS, or TRS satisfies the event or condition. More specifically, N and M may be configured by the NW. More specifically, N may be the number of reference signals such as SSB, CSI-RS, or TRS to be reported, and M may be the number of candidate or serving cells configured by the NW. More specifically, the N and M may be included in a report content configured by the NW for LTM measurement results.

[0085] More specifically, the UE may transmit one or more measurement results for SSBs, CSI-RS, or TRS for one or more candidate cells on the LTM measurement report resource activated by the DCI, when the one or more measurement results for SSBs, CSI-RS, or TRS satisfy the event or condition. More specifically, if the payload of the LTM measurement report resource cannot fit into the resource used for the event triggered L1 measurement report, the UE may truncate a part of the event triggered L1 measurement report or prepend zeros or perform zero-padding to the event triggered L1 measurement report to match the resources used for the LTM measurement report resource.

[0086] In some implementations, if the UE transmits an SR or a UL notification, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. More specifically, the SR may be transmitted for informing the NW of the presence of an event triggered L1 measurement report. The SR may be dedicated configured for an event triggered L1 measurement report. The SR may be configured without being associated with a logical channel. The SR may be different from the link recovery request. In some implementations, after or when the UE transmits the SR, the UE may expect that performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report may be skipped in a specific duration.

[0087] In some implementations, if a UE receives a UL grant associated with a first characteristic, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The first characteristic may correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with or configured for the UE event triggered L1 measurement report. In some implementations, if a UE receives a UL grant associated with a second characteristic, the UE may not skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The second characteristic may not correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with or configured for the UE event triggered L1 measurement report.

[0088] More specifically, if the LTM measurement report type is configured as semi-persistent on PUCCH and eventTriggered, and the UE receives a MAC CE activating one or more LTM measurement reports, the UE may transmit the event triggered L1 measurement report on the nearest LTM measurement report resource activated by the MAC CE, after the event or condition is satisfied. More specifically, if the LTM measurement report type is configured as semi-persistent on PUCCH and the UE receives a MAC CE activating one or more LTM measurement reports, the UE may multiplex the event triggered L1 measurement report and the LTM measurement report on the nearest LTM measurement report resource activated by the MAC CE, after the event or condition is satisfied.

[0089] In some implementations, if the LTM measurement report type is configured as semi-persistent on PUCCH and an event triggered L1 measurement report is configured, such as eventTriggered in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType in the LTM-EventTriggered-ReportConfig IE, and the UE receives a MAC CE activating one or more LTM measurement reports, the UE may transmit the event triggered L1 measurement report on the nearest LTM measurement report resource activated by the MAC CE, after the event or condition is satisfied. In some implementations, if the LTM measurement report type is configured as semi-persistent on PUCCH and an event triggered L1 measurement report is configured, such as eventTriggered in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType in the LTM-EventTriggered-ReportConfig IE, and the UE receives a MAC CE activating one or more LTM measurement reports, the UE may transmit the event triggered L1 measurement report on the latest LTM measurement report resource activated by the MAC CE, after or when the event or condition is satisfied. In some implementations, if the LTM measurement report type is configured as semi-persistent on PUCCH and an event triggered L1 measurement report is configured, such as eventTriggered in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType in the LTM-EventTriggered-ReportConfig IE, and the UE receives a MAC CE activating one or more LTM measurement reports, the UE may transmit the event triggered L1 measurement report on the first LTM measurement report resource activated by the MAC CE, after or when the event or condition is satisfied.

[0090] More specifically, the UE may transmit N measurement results for SSBs, CSI-RS, or TRS for each cell among M cells on the nearest LTM measurement report resource activated by the MAC CE, when at least one of the N×M measurement results for SSBs, CSI-RS, or TRS satisfies the event or condition. More specifically, N and M may be configured by the NW. More specifically, N may be the number of reference signals such as SSB, CSI-RS, or TRS to be reported, and M may be the number of candidate or serving cells configured by the NW. More specifically, the N and M may be included in a report content configured by the NW for LTM measurement results.

[0091] More specifically, the UE may transmit one or more measurement results for SSBs, CSI-RS, or TRS for one or more candidate cells on the LTM measurement report resource activated by the MAC CE, when the one or more measurement results for SSBs, CSI-RS, or TRS satisfy the event or condition. More specifically, if the payload of the LTM measurement report resource cannot fit into the resource used for LTM, the UE may truncate a part of the event triggered L1 measurement report or prepend zeros or perform zero-padding to the event triggered L1 measurement report to match the resources used for the LTM measurement report.

[0092] In some implementations, if the UE transmits an SR or a UL notification, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. More specifically, the SR may be transmitted for informing the NW of the presence of an event triggered L1 measurement report. The SR may be dedicated configured for an event triggered L1 measurement report. The SR may be configured without being associated with a logical channel. The SR may be different from the link recovery request. In some implementations, after or when the UE transmits the SR, the UE may expect that performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report may be skipped in a specific duration.

[0093] In some implementations, if a UE receives a UL grant associated with a first characteristic, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The first characteristic may correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with or configured for the UE event triggered L1 measurement report. In some implementations, if a UE receives a UL grant associated with a second characteristic, the UE may not skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The second characteristic may not correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with or configured for the UE event triggered L1 measurement report.

[0094] More specifically, if the LTM measurement report type is configured as periodic and eventTriggered, the UE may transmit the event triggered L1 measurement report on the nearest LTM measurement report resource configured by RRC, after the event or condition is satisfied. More specifically, if the LTM measurement report type is configured as periodic, the UE may transmit the event triggered L1 measurement report and the LTM measurement report on the nearest LTM measurement report resource configured by RRC, after the event or condition is satisfied.

[0095] In some implementations, if the LTM measurement report type is configured as periodic and an event triggered L1 measurement report is configured, such as eventTriggered in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType in the LTM-EventTriggered-ReportConfig IE, the UE may transmit the event triggered L1 measurement report on the nearest LTM measurement report resource configured by RRC, after the event or condition is satisfied. In some implementations, if the LTM measurement report type is configured as periodic and an event triggered L1 measurement report is configured, such as eventTriggered in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType in the LTM-EventTriggered-ReportConfig IE, the UE may transmit the event triggered L1 measurement report on the latest LTM measurement report resource configured by RRC, after or when the event or condition is satisfied. In some implementations, if the LTM measurement report type is configured as periodic and an event triggered L1 measurement report is configured, such as eventTriggered in the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE, or the ltm-EventTriggered-ReportConfigType in the LTM-EventTriggered-ReportConfig IE, the UE may transmit the event triggered L1 measurement report on the first LTM measurement report resource configured by RRC, after or when the event or condition is satisfied. In some implementations, the UE may transmit an event triggered L1 measurement report transmission on the one or more of the LTM measurement report resources such as PUCCH or CG PUSCH without transmitting an SR or UL notifications in advance.

[0096] More specifically, the UE may transmit N measurement results for SSBs, CSI-RS, or TRS for each cell among M cells on the nearest LTM measurement report resource configured by RRC, when at least one of the N×M measurement results for SSBs, CSI-RS, or TRS satisfies the event or condition. More specifically, N and M may be configured by the NW. More specifically, N may be the number of reference signals such as SSB, CSI-RS, or TRS to be reported, and M may be the number of candidate or serving cells configured by the NW. More specifically, the N and M may be included in a report content configured by the NW for LTM measurement results.

[0097] More specifically, the UE may transmit one or more measurement results for SSBs, CSI-RS, or TRS for one or more candidate cells on the LTM measurement report resource configured by RRC, when the one or more measurement results for SSBs, CSI-RS, or TRS satisfy the event or condition. More specifically, if the payload of the LTM measurement report resource cannot fit into the resource used for the event triggered L1 measurement report, the UE may truncate a part of the event triggered L1 measurement report or prepend zeros or perform zero-padding to the event triggered L1 measurement report to match the resources used for the LTM measurement report.

[0098] In some implementations, if the UE transmits an SR or a UL notification, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. More specifically, the SR may be transmitted for informing the NW of the presence of an event triggered L1 measurement report. The SR may be dedicated configured for an event triggered L1 measurement report. The SR may be configured without being associated with a logical channel. The SR may be different from the link recovery request. In some implementations, after or when the UE transmits the SR, the UE may expect that performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report may be skipped in a specific duration.

[0099] In some implementations, if a UE receives a UL grant associated with a first characteristic, the UE may skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The first characteristic may correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with or configured for the UE event triggered L1 measurement report. In some implementations, if a UE receives a UL grant associated with a second characteristic, the UE may not skip performing truncation or zero-padding to information bits or coded symbols of the event triggered L1 measurement report. The second characteristic may not correspond to a specific CORESET, a search space, an RNTI, a field in the UL grant, or a DCI format associated with or configured for the UE event triggered L1 measurement report.

[0100] In some implementations, the UL notification may indicate which LTM measurement report or resource in the LTM measurement periodicity the UE may use to transmit the event triggered L1 measurement report.

[0101] In some implementations, the UE may not transmit the LTM measurement report when an event triggered L1 measurement report is configured.

[0102] In some implementations, the UE may release or change the configuration of the LTM measurement report when an event triggered L1 measurement report is configured. In some implementations, the UE may not perform measurement for the LTM measurement report when an event triggered L1 measurement report is configured.

[0103] More specifically, the LTM measurement report may be configured in the LTM-CSI-Report IE and the event triggered L1 measurement report may be configured in the LTM-EventTriggered-ReportConfig IE. More specifically, the LTM measurement report may be configured in the LTM-CSI-Report IE and the event triggered L1 measurement report may be configured when the ltm-ReportConfigType in the LTM-CSI-ReportConfig IE is set to eventTriggered.

[0104] In some implementations, the UE may not expect to be configured with a report configuration for event triggered and a report configuration for the LTM measurement report. In some implementations, if the UE transmits an event triggered L1 measurement report, the UE may not transmit the LTM measurement report for a specific duration.

[0105] More specifically, the starting time of the specific duration, with units of milliseconds, slots, symbols, or frames, may be one of the following: (1) when one or more measurement results for SSBs, CSI-RS, or TRS satisfy the event or condition, or (2) when the UE transmits the event triggered L1 measurement report. More specifically, the specific duration may be configured by RRC.

[0106] In some implementations, the NW may pre-configure a dedicated resource for the event triggered L1 measurement report. In some implementations, the UE may transmit a UL notification to the NW, and may use the one or more of the pre-configured dedicated resources, such as PUCCH or CG PUSCH, indicated in the UL notification for event triggered L1 measurement report transmission.

[0107] More specifically, the UL notification may indicate which one or more of the pre-configured dedicated resources may be used by the UE to transmit the event triggered L1 measurement report. More specifically, before the UE transmits the event triggered L1 measurement report on one or more specific pre-configured dedicated resources, the UE may transmit a UL notification with a bitmap or with a value or codepoint to inform the NW which one or more pre-configured dedicated resources may be used. For example, if the NW receives a UL notification with a bitmap 0010 or with a value or codepoint 2, the NW may determine that the UE transmits the event triggered L1 measurement report on the second of the total four pre-configured dedicated resources, or the pre-configured dedicated resource corresponds to the value or codepoint 2. More specifically, the UL notification may indicate via a bitmap or a codepoint which one or more specific pre-configured dedicated resources the UE may use to transmit the event triggered L1 measurement report in a periodicity. The MSB or LSB may indicate the first pre-configured dedicated resource in time, and the LSB or MSB may indicate the last pre-configured dedicated resource in time in a pre-configured periodicity for pre-configured dedicated resources.

[0108] In some implementations, the UE may perform the event triggered L1 measurement report transmission on the one or more of the pre-configured dedicated resources such as PUCCH or CG PUSCH. In some implementations, the UE may perform the event triggered L1 measurement report transmission on the one or more of the pre-configured dedicated resources such as PUCCH or CG PUSCH without transmitting an SR or UL notifications in advance. More specifically, the pre-configured dedicated resources may be associated with one or more UL resources for the event triggered L1 measurement report.

[0109] In some implementations, when one or more of the conditions or events are satisfied, the UE may transmit an SR or a UL notification to the NW, and the UE may transmit the event trigger L1 measurement report in a MAC CE on a PUSCH. More specifically, the UL notification may indicate, via a bitmap or a codepoint, which configured PUSCH may include the MAC CE.

[0110] In some implementations, the UE event triggered L1 measurement report may include at least one of the following items (1) to (6):

[0111] (1) at least one measurement result of the reference resources such as SSB, CSI-RS, or TRS which satisfies the event or condition;

[0112] (2) an ID of one or more candidate cells with at least one reference resource such as SSB, CSI-RS, or TRS measurement result that satisfies the event or condition;

[0113] (3) N×M measurement results with at least one measurement result of one or more reference resources such as SSB, CSI-RS, or TRS of the one or more candidate cells satisfying the event or condition, where N may be the number of reference signals such as SSB, CSI-RS, or TRS to be reported, and M may be the number of candidate or serving cells configured by the NW;

[0114] (4) one or more measurement results of one or more reference resources such as SSB, CSI-RS, or TRS of the one or more candidate cells satisfying the event or condition;

[0115] (5) one or more measurement results with at least one measurement result of one or more reference resources such as SSB, CSI-RS, or TRS of a candidate cell satisfying the event or condition; or

[0116] (6) one or more measurement results of one or more reference resources such as SSB, CSI-RS, or TRS of a candidate cell satisfying the event or condition.

[0117] In some implementations, the event or condition may be considered or determined as satisfied when one or more measurement results of reference signals for CSI-RS, SSB, or TRS of the serving cell become worse than a second threshold. In some implementations, the event or condition may be considered or determined as satisfied when at least X measurement results of reference signals for CSI-RS, SSB, or TRS of a candidate cell become better than one or more measurement results of reference signals for CSI-RS, SSB, or TRS of the serving cell.

[0118] More specifically, the one measurement result of reference signals for CSI-RS, SSB, or TRS of the serving cell may be the reference signal with the highest RSRP, RSRQ, or SINR. More specifically, some measurement results of reference signals for CSI-RS, SSB, or TRS of the serving cell may be a specific number of reference signals, such as 3 reference signals, with the highest RSRP, RSRQ, or SINR. In some implementations, the event or condition may be considered or determined as satisfied when at least X measurement results of reference signals for CSI-RS, SSB, or TRS of a candidate cell become better than a first threshold. In some implementations, the event or condition may be considered or determined as satisfied when at least X measurement results of reference signals for CSI-RS, SSB, or TRS of a candidate cell become better than a first threshold and the one or more measurement results of reference signals for CSI-RS, SSB, or TRS of the serving cell become worse than a second threshold.

[0119] In some implementations, the event or condition may be considered or determined as satisfied when X measurement results of reference signals for CSI-RS, SSB, or TRS of a candidate cell become better than one or more measurement results of reference signals for CSI-RS, SSB, or TRS of the serving cell for a first specific duration, such as Time to Trigger. More specifically, the one measurement result of reference signals for CSI-RS, SSB, or TRS of the serving cell may be the reference signal with the highest RSRP, RSRQ, or SINR. More specifically, some measurement results of reference signals for CSI-RS, SSB, or TRS of the serving cell may be a specific number of reference signals, such as 3 reference signals, with the highest RSRP, RSRQ, or SINR. In some implementations, the event or condition may be considered or determined as satisfied when X measurement results of reference signals for CSI-RS, SSB, or TRS of a candidate cell become better than a first threshold for a specific duration. In some implementations, the event or condition may be considered or determined as satisfied when X measurement results of reference signals for CSI-RS, SSB, or TRS of a candidate cell become better than a first threshold for a specific duration and the one or more measurement results of reference signals for CSI-RS, SSB, or TRS of the serving cell become worse than a second threshold.

[0120] In some implementations, the report quantity of the event triggered L1 measurement result may be set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-SINR', 'ssb-Index-SINR', 'cri-RSRPIndex', 'ssb-Index-RSRP-Index', 'cri-SINR-Index', 'ssb-Index-SINR-Index', or 'none'.

[0121] In some implementations, the UE may activate the TCI states corresponding to the reference signals reported in the event triggered L1 measurement report when or after the UE transmits the event triggered L1 measurement report or the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the association of TCI states and reference signals may be configured by the NW. In some implementations, when the NW receives the event triggered L1 measurement report, the NW may activate TCI states for the cells included in the report, which are the cells satisfying the event. In some implementations, when the NW receives the event triggered L1 measurement report, the NW may transmit a signal to the UE to inform that the activated TCI states for the cells may or may not be included in the report, which are the cells satisfying the event. In some implementations, when or after the UE transmits the event triggered L1 measurement report, the UE may not expect to receive TCI states activation corresponding to reference signals for CSI-RS, SSB, or TRS not included in the event triggered L1 measurement report.

[0122] In some implementations, the UE may activate one or more TCI states corresponding to one or more reference signals reported in the event triggered L1 measurement report when the UE transmits the event triggered L1 measurement report. In some implementations, the UE may activate one or more TCI states corresponding to one or more reference signals reported in the event triggered L1 measurement report when the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the UE may not need to receive a MAC CE for activating or deactivating TCI states corresponding to one or more reference signals reported in the event triggered L1 measurement report.

[0123] In some implementations, the UE may activate or indicate one TCI state of one candidate cell when the UE transmits the event triggered L1 measurement report. In some implementations, the UE may activate or indicate one TCI state of one candidate cell when the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the event triggered L1 measurement report may include one reference signal of one candidate cell and only one TCI state may be associated with the reference signal.

[0124] In some implementations, the UE may activate more than one TCI state of one reference signal of one candidate cell when the UE transmits the event triggered L1 measurement report. In some implementations, the UE may activate more than one TCI state of one reference signal of one candidate cell when the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the event triggered L1 measurement report may include one reference signal of one candidate cell and more than one TCI state may be associated with the reference signal.

[0125] In some implementations, the UE may activate more than one TCI state of more than one reference signal of one candidate cell when the UE transmits the event triggered L1 measurement report. In some implementations, the UE may activate more than one TCI state of more than one reference signal of one candidate cell when the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the event triggered L1 measurement report may include more than one reference signal of one candidate cell.

[0126] In some implementations, the UE may activate one or more TCI states corresponding to one or more reference signals with measurement results satisfying the event or condition or corresponding to one or more reference signals reported in the event triggered L1 measurement report when the UE transmits the event triggered L1 measurement report. In some implementations, the UE may activate one or more TCI states corresponding to one or more reference signals which measurement results satisfy the event or condition or are reported in the event triggered L1 measurement report when the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the event triggered L1 measurement report may include at least one reference signal measurement result that satisfied the event or condition.

[0127] In some implementations, the UE may expect that the TCI states activated by the NW may correspond to the reference signals reported in the event triggered L1 measurement report when or after the UE transmits the event triggered L1 measurement report or the UE receives an ACK corresponding to the event triggered L1 measurement report. In some implementations, the UE may not expect that the TCI states activated by the NW do not correspond to the reference signals reported in the event triggered L1 measurement report when or after the UE transmits the event triggered L1 measurement report or the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the association of TCI states and reference signals may be configured by the NW.

[0128] In some implementations, the UE may transmit one or more preambles to a candidate cell when or after the UE receives an ACK corresponding to the event triggered L1 measurement report. More specifically, the association of TCI states and reference signals may be configured by the NW.

[0129] In some implementations, the UE may monitor an ACK corresponding to the event triggered L1 measurement report after the event triggered L1 measurement report is transmitted. In some implementations, the ACK corresponding to the event triggered L1 measurement report may be a DL signal or channel. More specifically, the UE may monitor a specific search space such as EventTriggeredSearchSpace after the event triggered L1 measurement report is transmitted. More specifically, the UE may monitor a DCI scrambled by a specific RNTI such as event-triggered-rnti after the event triggered L1 measurement report is transmitted. More specifically, the UE may monitor a specific DCI format such as DCI format 2_x. More specifically, the UE may monitor a specific DCI field such as an Event Triggered indication field.

[0130] In some implementations, the UE may receive a DL signal or channel as an ACK corresponding to the event triggered L1 measurement report, where the DL signal or channel may include at least one of a candidate cell ID, a random access preamble index, a UL / SUL indicator, an SSB index, and a PRACH Mask index. In some implementations, when a UE receives the signal or channel after the event triggered L1 measurement report is transmitted, the UE may perform an RA procedure or transmit a preamble to the candidate cell indicated in the signal or channel.

[0131] In some implementations, the UE may receive a DL signal or channel as an ACK corresponding to the event triggered L1 measurement report, where the DL signal or channel may include at least one of a random access preamble index, a UL / SUL indicator, an SSB index, and a PRACH Mask index. In some implementations, when a UE receives the signal or channel after the event triggered L1 measurement report is transmitted, and the event triggered L1 measurement report incldues a reference signal to only one candidate cell, the UE may perform PRACH to the candidate cell reported in the event triggered L1 measurement report.

[0132] In the present disclosure, many implementations to support event triggered L1 measurement report are described. With the techniques described in this disclosure, event triggered L1 measurement report may be achieved.

[0133] In some implementations, a method performed by a UE may include one or more of the following: receiving an LTM measurement report configuration with a report type set to one of periodic, semi-persistent on PUCCH, semi-persistent on PUSCH, and aperiodic; measuring one or more reference signals of one or more candidate cells; sending a UL notification to the NW in a case where one or more events are satisfied, where for the one or more events, the event or condition may be considered or determined as satisfied when one or more measurement results of reference signals for CSI-RS, SSB, or TRS of a serving cell become worse than a threshold; and transmitting measurement results of the one or more reference signals of one or more candidate cells on a nearest, latest, or first available UL resource configured, indicated, or activated by the LTM measurement report configuration.

[0134] In some implementations, a method performed by a UE may include one or more of the following: transmitting a measurement report comprising at least one measurement result of one or more reference signals of one or more candidate cells satisfying one or more events; activating one or more TCI states associated with the one or more reference signals when or after the measurement report is transmitted or when or after receiving a DL signal or channel monitored in a specific search space or scrambled by a specific RNTI; and transmitting a preamble to a candidate cell according to the DL signal or channel.

[0135] FIG. 1 is a flowchart illustrating method / process 100 for measurement reporting in a wireless communication system, according to an example implementation of the present disclosure. Although actions 102, 104, 106, and 108 are illustrated, as separate actions, represented as independent blocks in FIG. 1, these separately illustrated actions should not be construed as to be necessarily order-dependent. The order in which the actions are performed in FIG. 1 is not intended to be construed as a limitation, and any number of the disclosed blocks may be combined in any order to implement the method, or an alternative method. Each of actions 102, 104, 106, and 108 may be performed independent of the other actions, and may be omitted in some implementations of the present disclosure. Moreover, method / process 100 may be combined with other procedures / methods described in the present disclosure. Process 100 may be performed by a UE, with each action of process 100 corresponding to an operation executed by the UE.

[0136] In action 102, the UE may receive an LTM configuration including an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure (e.g., the report type is set to ‘eventTriggered’).

[0137] In action 104, the UE may perform, based on the LTM configuration, a measurement on a set of reference signals from one or more candidate cells. For instance, the UE may measure N reference signals for each of M candidate cells, where N and M are values configured by the network in the report content of the LTM configuration.

[0138] In action 106, the UE may determine whether an event for initiating the event-triggered measurement reporting procedure is satisfied.

[0139] In action 108, the UE may transmit a measurement result to a serving cell in response to determining that the event is satisfied. For example, once the event is satisfied, the UE may perform the event-triggered measurement reporting procedure in which the UE may autonomously transmit the measurement result to the serving cell without waiting for periodic reporting occasions or explicit triggering commands from the network.

[0140] In some implementations, after determining that the event is satisfied, the UE may transmit an SR to the serving cell to request an uplink resource for transmitting the measurement result. For example, if the UE determines that no SR resource is configured for the measurement result transmission, the UE may transmit the SR to the serving cell to request the uplink resource.

[0141] In some implementations, the SR may be dedicated configured for the event-triggered measurement reporting procedure.

[0142] In some implementations, the UE may autonomously activate one or more TCI states associated with the set of reference signals in response to determining that the event is satisfied.

[0143] In some implementations, the event for initiating the event-triggered measurement reporting procedure may include at least one of the following: a signal quality metric of a reference signal in the set of reference signals exceeding, or falling below, a threshold for a first period of time, or the signal quality metric of the reference signal in the set of reference signals exceeding, or falling below, a signal quality metric of a serving cell reference signal by an offset for a second time period.

[0144] In some implementations, the LTM configuration may further include at least one timer value specifying the first period of time and the second period of time.

[0145] In some implementations, the event for initiating the event-triggered measurement reporting procedure corresponds to an LTM configuration identifier.

[0146] In some implementations, the UE may transmit the measurement result to the serving cell via a MAC CE.

[0147] Process 100 may provide several technical advantages for LTM operations in wireless communication systems. By combining event-triggered reporting with LTM functionality, process 100 may significantly reduce both measurement report latency and cell switching delay. When a candidate cell’s signal quality satisfies the configured event, the UE may immediately report the measurement result without waiting for periodic LTM measurement occasions, enabling faster LTM cell switching based on the timely measurement information.

[0148] It should also be noted that the network device, such as the BS, may perform methods / actions corresponding to those performed by the UE. For example, the receiving actions performed by the UE may correspond to the transmitting / configuring actions of the network device; the transmitting actions performed by the UE may correspond to the receiving actions of the network device. That is, the network device and the UE may have reciprocally aligned roles in transmission and reception, as illustrated in FIG. 2.

[0149] FIG. 2 is a flowchart illustrating method / process 200 for a network device in a wireless communication system, according to an example implementation of the present disclosure. Method / process 200 may be combined with other procedures / methods described in the present disclosure. Process 200 may be performed by a network device, such as a BS, with each action of process 200 corresponding to an operation executed by the network device.

[0150] In action 202, the network device may transmit, to a UE, an LTM configuration including an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure. The LTM configuration may enable the UE to perform a measurement on a set of reference signals from one or more candidate cells and determine whether an event for initiating the event-triggered measurement reporting procedure is satisfied.

[0151] In action 204, the network device may receive, from the UE, a measurement report in response to the UE determining that the event is satisfied.

[0152] FIG. 3 is a block diagram illustrating node 300 for wireless communications, in accordance with various aspects of the present disclosure. As illustrated in FIG. 3, node 300 may include transceiver 320, processor 328, memory 334, one or more presentation components 338, and at least one antenna 336. Node 300 may also include a radio frequency (RF) spectrum band module, a BS communications module, a network communications module, and a system communications management module, Input / Output (I / O) ports, I / O components, and a power supply (not illustrated in FIG. 3).

[0153] Each of the components may directly or indirectly communicate with each other over one or more buses 340. Node 300 may be a UE or a BS that performs various functions disclosed with reference to FIG. 1 and FIG. 2.

[0154] Transceiver 320 has transmitter 322 (e.g., transmitting / transmission circuitry) and receiver 324 (e.g., receiving / reception circuitry) and may be configured to transmit and / or receive time and / or frequency resource partitioning information. Transceiver 320 may be configured to transmit in different types of subframes and slots including, but not limited to, usable, non-usable, and flexibly usable subframes and slot formats. Transceiver 320 may be configured to receive data and control channels.

[0155] Node 300 may include a variety of computer-readable media. Computer-readable media may be any available media that may be accessed by node 300 and include volatile (and / or non-volatile) media and removable (and / or non-removable) media.

[0156] The computer-readable media may include computer-storage media and communication media. Computer-storage media may include both volatile (and / or non-volatile media), and removable (and / or non-removable) media implemented in any method or technology for storage of information such as computer-readable instructions, data structures, program modules, or data.

[0157] Computer-storage media may include RAM, ROM, EPROM, EEPROM, flash memory (or other memory technology), CD-ROM, Digital Versatile Disks (DVD) (or other optical disk storage), magnetic cassettes, magnetic tape, magnetic disk storage (or other magnetic storage devices), etc. Computer-storage media may not include a propagated data signal. Communication media may typically embody computer-readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave, or other transport mechanisms and include any information delivery media.

[0158] The term “modulated data signal” may mean a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal. Communication media may include wired media, such as a wired network or direct-wired connection, and wireless media, such as acoustic, RF, infrared, and other wireless media. Combinations of any of the aforementioned listed components should also be included within the scope of computer-readable media.

[0159] Memory 334 may include computer-storage media in the form of volatile and / or non-volatile memory. Memory 334 may be removable, non-removable, or a combination thereof. Example memory may include solid-state memory, hard drives, optical-disc drives, etc. As illustrated in FIG. 3, memory 334 may store a computer-readable and / or computer-executable instructions 332 (e.g., software codes) that are configured to, when executed, cause processor 328 to perform various functions disclosed herein, for example, with reference to FIG. 1 and FIG. 2. Alternatively, instructions 332 may not be directly executable by processor 328 but may be configured to cause node 300 (e.g., when compiled and executed) to perform various functions disclosed herein.

[0160] Processor 328 (e.g., having processing circuitry) may include an intelligent hardware device, e.g., a Central Processing Unit (CPU), a microcontroller, an ASIC, etc. Processor 328 may include memory. Processor 328 may process data 330 and instructions 332 received from memory 334, and information transmitted and received via transceiver 320, the baseband communications module, and / or the network communications module. Processor 328 may also process information to send to transceiver 320 for transmission via antenna 336 to the network communications module for transmission to a CN.

[0161] One or more presentation components 338 may present data indications to a person or another device. Examples of presentation components 338 may include a display device, a speaker, a printing component, a vibrating component, etc.

[0162] In view of the present disclosure, it is obvious that various techniques may be used for implementing the disclosed concepts without departing from the scope of those concepts. Moreover, while the concepts have been disclosed with specific reference to certain implementations, a person of ordinary skill in the art may recognize that changes may be made in form and detail without departing from the scope of those concepts. As such, the disclosed implementations are to be considered in all respects as illustrative and not restrictive. It should also be understood that the present disclosure is not limited to the particular implementations disclosed and many rearrangements, modifications, and substitutions are possible without departing from the scope of the present disclosure.

Claims

1. A User Equipment (UE), the UE comprising: 　　　　at least one processor; and 　　　　at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the UE to: 　　　　receive a Layer 1 / Layer 2 Triggered Mobility (LTM) configuration comprising an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure; 　　　　perform, based on the LTM configuration, a measurement on a set of reference signals from one or more candidate cells; 　　　　determine whether an event for initiating the event-triggered measurement reporting procedure is satisfied; and 　　　　transmit a measurement result to a serving cell in response to determining that the event is satisfied.

2. The UE of claim 1, wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to: 　　　　after determining that the event is satisfied, transmit a Scheduling Request (SR) to the serving cell to request an uplink resource for transmitting the measurement result.

3. The UE of claim 2, wherein the SR is dedicated configured for the event-triggered measurement reporting procedure.

4. The UE of claim 1, wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the UE to: 　　　　autonomously activate one or more TCI states associated with the set of reference signals in response to determining that the event is satisfied.

5. The UE of claim 1, wherein the event for initiating the event-triggered measurement reporting procedure comprises at least one of: 　　　　a signal quality metric of a reference signal in the set of reference signals exceeding, or falling below, a threshold for a first period of time, or 　　　　the signal quality metric of the reference signal in the set of reference signals exceeding, or falling below, a signal quality metric of a serving cell reference signal by an offset for a second time period.

6. The UE of claim 5, wherein the LTM configuration further comprises at least one timer value specifying the first period of time and the second period of time.

7. The UE of claim 1, wherein the event for initiating the event-triggered measurement reporting procedure corresponds to an LTM configuration identifier.

8. The UE of claim 1, wherein transmitting the measurement result to the serving cell comprises: 　　　　transmitting the measurement result to the serving cell via a Medium Access Control (MAC) Control Element (CE).

9. A method performed by a User Equipment (UE) for measurement reporting, the method comprising: 　　　　receiving a Layer 1 / Layer 2 Triggered Mobility (LTM) configuration comprising an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure; 　　　　performing, based on the LTM configuration, a measurement on a set of reference signals from one or more candidate cells; 　　　　determining whether an event for initiating the event-triggered measurement reporting procedure is satisfied; and 　　　　transmit a measurement result to a serving cell in response to determining that the event is satisfied.

10. A network device, the network device comprising: 　　　　at least one processor; and 　　　　at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the network device to: 　　　　transmit, to a User Equipment (UE), a Layer 1 / Layer 2 Triggered Mobility (LTM) configuration comprising an LTM measurement report configuration specifying a report type for an event-triggered measurement reporting procedure, wherein the LTM configuration enables the UE to perform a measurement on a set of reference signals from one or more candidate cells and determine whether an event for initiating the event-triggered measurement reporting procedure is satisfied; and 　　　　receive, from the UE, a measurement report in response to the UE determining that the event is satisfied.

11. The network device of claim 10, wherein the one or more computer-executable instructions, when executed by the at least one processor, further cause the network device to: 　　　　receive, from the UE, a Scheduling Request (SR) requesting an uplink resource for transmitting the measurement report.

12. The network device of claim 11, wherein the SR is dedicated configured for the event-triggered measurement reporting procedure.

13. The network device of claim 10, wherein the event for initiating the event-triggered measurement reporting procedure comprises at least one of: 　　　　a signal quality metric of a reference signal in the set of reference signals exceeding, or falling below, a threshold for a first period of time; or 　　　　the signal quality metric of the reference signal in the set of reference signals exceeding, or falling below, a signal quality metric of a serving cell reference signal by an offset for a second time period.

14. The network device of claim 13, wherein the LTM configuration further comprises at least one timer value specifying the first period of time and the second period of time.

15. The network device of claim 10, wherein receiving the measurement report from the UE comprises: 　　　　receiving the measurement report via a Medium Access Control (MAC) Control Element (CE).

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