Systems and methods for selecting layer 1 / layer 2 triggered mobility candidate cells to include in channel state information measurement report

Abstract

A method (200) at a user equipment, UE (412A), for Layer 1 / Layer 2-triggered Mobility, LTM, Channel State Information, CSI, measurement reporting includes receiving (202), from a network node (410A), at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration includes and / or indicates at least one of: a set of LTM candidate cells; and a set of Reference Signals, RSs, for each LTM candidate cell. Based at least on the at least one LTM CSI reporting configuration, the UE transmits (204) a first LTM CSI measurement report to the network node. The first LTM CSI measurement report includes measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs.

Description

[0001] SYSTEMS AND METHODS FOR SELECTING LAYER 1 / LAYER 2 TRIGGERED MOBILITY CANDIDATE CELLS TO INCLUDE IN CHANNEL STATE INFORMATION MEASUREMENT REPORT TECHNICAL FIELD The present disclosure relates, in general, to wireless communications and, more particularly, systems and methods for selecting Layer 1 (L1) / Layer 2 (L2) Triggered Mobility (LTM) candidate cells to include in LTM Channel State Information (CSI) measurement report. BACKGROUND In 3rdGeneration Partnership Project (3GPP) Release 18, a work item known as Further NR Mobility Enhancements has been agreed. This work item includes a technical area entitled Layer 1 (L1) / Layer 2 (L2) based inter-cell mobility. According to the Work Item Description (WID) [Error! Reference source not found.], when the User Equipment (UE) moves from the coverage area of one cell to another cell, at some point, a serving cell change needs to be performed. Currently, serving cell change is triggered by Layer 3 (L3) measurements and is done by Radio Resource Control (RRC) signalling triggered Reconfiguration with Synchronisation for change of Primary Cell (PCell) and Primary Secondary Cell (PSCell), as well as release add for Secondary Cells (SCells) when applicable. All cases involve complete L2 (and L1) resets, leading to longer latency, larger overhead and longer interruption time than beam switch mobility. The goal of L1 / L2 based inter-cell mobility is to enable a serving cell change via L1 / L2 signalling, in order to reduce the latency, overhead and interruption time. See, RP-231475, 3GPP Work Item Description: Further NR mobility enhancements, MediaTek Inc, Apple, 3GPP TSG RAN Meeting#100, Taipei June 12-14, 2023. According to the WID, the following is included as one objective of the work: To specify mechanism and procedures of L1 / L2 based inter-cell mobility for mobility latency reduction: o Configuration and maintenance multiple candidate cells to allow fast application of configurations for candidate cells [RAN2, RAN3] o Dynamic switch mechanism among candidate serving cells (including SpCell and SCell) for the potential applicable scenarios based on L1 / L2 signalling [RAN2, RAN1] o L1 enhancements for inter-cell beam management, including L1 measurement and reporting, and beam indication [RAN1, RAN2] - Note 1: Early RAN2 involvement is necessary, including the possibility of further clarifying the interaction between this bullet with the previous bullet o Timing Advance management [RAN1, RAN2] o CU-DU interface signaling to support L1 / L2 mobility, if needed [RAN3] Note 2: FR2 specific enhancements are not precluded, if any. Note 3: The procedure of L1 / L2 based inter-cell mobility are applicable to the following scenarios: ^ Standalone, CA and NR-DC case with serving cell change within one CG ^ Intra-DU case and intra-CU inter-DU case (applicable for Standalone and CA: no new RAN interfaces are expected) ^ Both intra-frequency and inter-frequency ^ Both FR1 and FR2 ^ Source and target cells may be synchronized or non-synchronized A basic principle with L1 / L2-triggered mobility (LTM) is that the UE is pre-configured, by the network, with a Radio Resource Control (RRC) configuration per LTM candidate cell, sometimes also known as a LTM candidate cell configuration. Such a LTM candidate cell configuration may be an RRCReconfiguration message or one or more Information Elements (IEs) / fields / parameters such as CellGroupConfig, which is stored when the UE is configured with LTM. The UE transmits lower layer measurements (e.g., L1-Reference Signal Received Power (L1- RSRP)) on these candidate LTM candidate cells to the network. In response, the UE receives from the network a lower layer signal (such as a Medium Access Control-Control Element (MAC CE) or Downlink Control Information (DCI)) to trigger the execution of LTM cell switch in the UE, sometimes also referred to as a LTM cell switch command. In response, the UE accesses the LTM candidate cell indicated in the LTM cell switch command and switches to a configuration of an LTM candidate cell. When the UE is with multiple LTM candidate cells, the UE receives multiple LTM candidate cell configuration(s) (e.g., multiple RRCReconfiguration messages to be stored). Each is associated to an LTM candidate identifier (ID), which may be later referred in the LTM cell switch command that the UE may receive, to indicate to which of the LTM candidate cells the UE needs to perform the LTM cell switch. Further, in Release 18, a UE receives a LTM Channel State Information (CSI) resource configuration from the network which may include multiple Synchronization Signal Blocks (SSBs) (that the UE should measure) from the LTM candidate cell. There currently exist certain challenge(s), however. For example, according to the endorsed RRC CR for LTM in R2-2311604, even if the UE is configured by the network with a CSI resource configuration (or LTM CSI resource configuration, e.g. instance of the IE LTM-CSI- ResourceConfig), which indicates a list of SSBs for each LTM candidate cell (for a maximum of 8 LTM candidate cells), in an LTM CSI reporting configuration, e.g. UE LTM-CSI-ReportConfig, the UE is also configured with an amount of LTM candidate cells (“L”) that a UE needs to include in a lower layer measurement report for LTM (e.g., LTM CSI report, or LTM CSI measurement report) to the network, which is up to L=4 in Release 18 (field ‘nrOfReportedCells’ in the IE LTM- ReportContent). See, R2-2311604, RRC running CR for LTM, Ericsson, 3GPP TSG-RAN WG2 Meeting #123bis, Xiamen, China, October 2023. For each of the 4 LTM candidate cell(s) that needs to be included, the UE needs to include in the report 4 SSBs. In other words, there needs to be 16 elements (resource indication and a lower layer measurement information such as, for example, L1-RSRP) in an LTM CSI report (or, in general terms, nrOfReportedCells x nrOfReportedRS-PerCell). The IEs for the LTM CSI reporting configuration and for the LTM CSI resource configuration are shown below: – LTM-CSI-ReportConfig The IE LTM-CSI-ReportConfig is used to configure report on the cell in which the LTM-CSI- ReportConfig is included. LTM-CSI-ReportConfig information element -- ASN1START -- TAG-LTM-CSI-REPORTCONFIG-START LTM-CSI-ReportConfig-r18 ::= SEQUENCE { ltm-CSI-ReportConfigId-r18 LTM-CSI-ReportConfigId-r18 ltm-ResourcesForChannelMeasurement-r18 LTM-CSI-ResourceConfigId-r18 ltm-ReportConfigType-r18 CHOICE { reportSlotConfig-r18 CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList-r18 SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUCCH-r18 SEQUENCE { } LTM-ReportContent-r18 ::= SEQUENCE { nrOfReportedCells-r18 ENUMERATED {n1,n2,n3,n4}, nrOfReportedRS-PerCell-r18 ENUMERATED {n1,n2,n3,n4}, spCellInclusion-r18 ENUMERATED {true} OPTIONAL, -- Need R } -- TAG-LTM-CSI-REPORTCONFIG-STOP -- ASN1STOP LTM-CSI-ReportConfig field descriptions ltm-CSI-ReportConfigId This field is used to identify an LTM-CSI-ReportConfig. ltm-ReportContent This field defines the content of the LTM L1 measurement report. ltm-ResourcesForChannelMeasurement This field indicates the resources used for LTM L1 measurements. pucch-CSI-ResourceList Indicates which PUCCH resource to use for reporting on PUCCH. reportConfigType This field describes the time domain behaviour of how the L1 measurements are reported. reportSlotConfig Periodicity and slot offset (see TS 38.214

[0019] , clause 5.2.1.4). LTM-ReportContent field descriptions nrOfReportedCells This field defines how many cells are reported within a single L1 measurement report instance. nrOfReportedRS-PerCell This field defines how many RSs per cell are reported within a single L1 measurement report instance. spCellInclusion This field indicates whether the UE shall include a L1 measurement report associated to the current SpCell. This field can only be configured if the current SpCell is configured as an LTM candidate cell. For example, the UE is configured in the LTM CSI resource configuration with SSB(s) for 5 LTM candidate cell(s) according to the following configuration in the LTM-CSI-ResourceConfig IE (which includes a set of LTM CSI resource(s)). According to the configuration, the UE may measure 5 SSBs that are transmitted by 5 different LTM candidate cells. If the network sends a configuration to the UE with the LTM-CSI- ReportConfig IE including the fields nrOfReportedCells-r18 set to n4 and nrOfReportedRS- PerCell-r18 set to n4, this means that UE shall include in the LTM CSI measurement report 4 LTM candidate cells and for each candidate cells 4 SSBs (the Reference Signal Received Power (RSRP) measured on those SSBs), and possibly an indication associated to a particular resource such as, for example, a SSB Resource Indicator (SSBRI). In this case, it is not obvious which criteria a UE should use to include the 4 LTM candidate cells and for each LTM candidate cell the 4 SSBs in a L1 measurement report. In R2-2309414, RAN1 indicated the following to RAN2, regarding the reporting for LTM: Agreement (RAN1#112bis) For the beam selection for SSB based L1-RSRP measurement report, ^ Beam selection is performed across the L cells from configured (or activated, if introduced) cells, i.e. M beams for each of the L cells - FFS: How to select the L cells and M beams per cells is up to UE ^ M x L beams are reported in a single report instance - Max values of M and L are based on UE capability, and at least M x L=4 is supported as a UE capability, other UE capabilities are FFS - FFS if UE is allowed to report less than M x L beams … Conclusion (RAN1#113) For the beam selection for SSB based L1-RSRP measurement report, except SpCell is configured to be included, ^ the selection of cells for the L1 measurement report is up to UE implementation. ^ the selection of beams per cell for the L1 measurement report is the same as legacy behaviour. See, R2-2309414, R1-2306386 LS on L1 for LTM, 3GPP TSG RAN WG2#123bis, Xiamen, China, 9th - 13th October 2023. In other words, according to the conclusion from RAN1#113, how to select the L cells (and consequently the SSBs) is up to UE implementation. SUMMARY Certain aspects of the disclosure and their embodiments may provide solutions to these or other challenges. For example, methods and systems are provided that include criteria for a UE to include a sub-set of LTM candidate cells in an LTM CSI measurement report and, for each LTM candidate cell that is included, criteria for including a sub-set of configured SSBs. In a particular embodiment, including a cell and SSB comprises including an identifier of the SSB and / or LTM candidate cell (e.g., resource identifier) and associated measurement information. According to certain embodiments, a method at a UE for LTM CSI measurement reporting includes receiving, from a network node, at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of Reference Signals, RSs, for each LTM candidate cell. Based at least on the at least one LTM CSI reporting configuration, the UE transmits a first LTM CSI measurement report to the network node. The first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs. The subset of the LTM candidate cells and / or the subset of the RSs of the LTM candidate cells is included in the first LTM CSI measurement report based on at least one of: one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells. According to certain embodiments, a UE for LTM CSI measurement reporting is adapted to receive, from a network node, at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of Reference Signals, RSs, for each LTM candidate cell. Based at least on the at least one LTM CSI reporting configuration, the UE is adapted to transmit a first LTM CSI measurement report to the network node. The first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs. The subset of the LTM candidate cells and / or the subset of the RSs of the LTM candidate cells is included in the first LTM CSI measurement report based on at least one of: one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells. According to certain embodiments, a method at a network node for receiving LTM CSI measurement reporting includes transmitting, to a UE, at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of RSs for each LTM candidate cell. Based at least on the at least one LTM CSI reporting configuration, the network node receives a first LTM CSI measurement report from the UE. The first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs. The subset of the set of LTM candidate cells and / or the subset of the set of RSs is included in the first LTM CSI measurement report based on at least one of: one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; an indication of relevance of at least one LTM cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells. According to certain embodiments, a network node for receiving LTM CSI measurement reporting is adapted to transmit, to a UE, at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of RSs for each LTM candidate cell. Based at least on the at least one LTM CSI reporting configuration, the network node is adapted to receive a first LTM CSI measurement report from the UE. The first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs. The subset of the set of LTM candidate cells and / or the subset of the set of RSs is included in the first LTM CSI measurement report based on at least one of: one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells. Certain embodiments may provide one or more of the following technical advantage(s). For example, certain embodiments may provide a technical advantage of enabling a UE to select the number of LTM candidate cells and the number of SSBs for each LTM candidate cell according to the number configured by the network. This will be the case in a situation where the number of LTM candidate cells and the number of SSBs configured as LTM CSI resources by the UE is larger than the maximum amount of LTM candidate cell and SSBs that can be included in the LTM CSI measurement report. As another example, certain embodiments may provide a technical advantages relating to testability and detectability. For example, when the UE selection to include LTM candidate cells is based on measurements, the rules can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so that the content of the report can be evaluated. In the case of a UE selecting an LTM candidate cell based on one or more measurements performed on a measurement quantity,, for example, the power of each LTM candidate cell in the lab setup can be adjusted (which should define the RSRP), so we are aware in the test which LTM candidate cells should have strongest radio conditions / RSRP, and, also having the content of the report, it may be determined whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s). An alternative test, especially for measurement quantities (not RSRP), is to configure an additional LTM CSI measurement report, triggered shortly before and / or after in time to the previous LTM CSI measurement report, but this time with an associated LTM CSI reporting configuration with L = L1. In that case, the lab network has the content of both reports, and can determine whether the second report is filled in according to the rule(s), where the rules can be reverse engineered based on the content of the second report (which would include measurements of all configured LTM candidate cells). Other advantages may be readily apparent to one having skill in the art. Certain embodiments may have none, some, or all of the recited advantages. BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the disclosed embodiments and their features and advantages, reference is now made to the following description, taken in conjunction with the accompanying drawings, in which: FIGURE 1 illustrates the Candidate Cell TCI States Activation / Deactivation MAC CE. FIGURE 2 illustrates an example method by a UE for LTM CSI measurement reporting, according to certain embodiments; FIGURE 3 illustrates an example method by a network node for receiving LTM CSI measurement reporting, according to certain embodiment FIGURE 4 illustrates an example communication system, according to certain embodiments; FIGURE 5 illustrates an example UE, according to certain embodiments; FIGURE 6 illustrates an example node, according to certain embodiments; FIGURE 7 illustrates a method an example method by a UE for LTM CSI measurement reporting, according to certain embodiments; FIGURE 8 illustrates an example method by a network node for receiving LTM CSI measurement reporting, according to certain embodiments ; FIGURE 9 illustrates an example method by a UE for LTM CSI measurement reporting, according to certain embodiments; and FIGURE 10 illustrates an example method. by a network node receiving LTM CSI measurement reporting, according to certain embodiments. DETAILED DESCRIPTION Some of the embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. Embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art. As used herein, ‘node’ can be a network node or a UE. Examples of network nodes are NodeB, base station (BS), multi-standard radio (MSR) radio node such as MSR BS, eNodeB (eNB), gNodeB (gNB), Master eNB (MeNB), Secondary eNB (SeNB), integrated access backhaul (IAB) node, network controller, radio network controller (RNC), base station controller (BSC), relay, donor node controlling relay, base transceiver station (BTS), Central Unit (e.g. in a gNB), Distributed Unit (e.g. in a gNB), Baseband Unit, Centralized Baseband, C-RAN, access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU), Remote Radio Head (RRH), nodes in distributed antenna system (DAS), core network node (e.g. Mobile Switching Center (MSC), Mobility Management Entity (MME), etc.), Operations & Maintenance (O&M), Operations Support System (OSS), Self Organizing Network (SON), positioning node (e.g. E- SMLC), etc. Another example of a node is user equipment (UE), which is a non-limiting term and refers to any type of wireless device communicating with a network node and / or with another UE in a cellular or mobile communication system. Examples of UE are target device, device to device (D2D) UE, vehicular to vehicular (V2V), machine type UE, MTC UE or UE capable of machine to machine (M2M) communication, Personal Digital Assistant (PDA), Tablet, mobile terminals, smart phone, laptop embedded equipment , laptop mounted equipment (LME), Unified Serial Bus (USB) dongles, etc. In some embodiments, generic terminology, “radio network node” or simply “network node (NW node)”, is used. It can be any kind of network node which may comprise base station, radio base station, base transceiver station, base station controller, network controller, evolved Node B (eNB), Node B, gNodeB (gNB), relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH), Central Unit (e.g. in a gNB), Distributed Unit (e.g. in a gNB), Baseband Unit, Centralized Baseband, C-RAN, access point (AP), etc. The term radio access technology (RAT), may refer to any RAT such as, for example, Universal Terrestrial Radio Access Network (UTRA), Evolved Universal Terrestrial Radio Access Network (E-UTRA), narrow band internet of things (NB-IoT), WiFi, Bluetooth, next generation RAT, NR, 4G, 5G, etc. Any of the equipment denoted by the terms node, network node or radio network node may be capable of supporting a single or multiple RATs. The term signal or radio signal used herein can be any physical signal or physical channel. Examples of downlink (DL) physical signals are reference signal (RS) such as Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), Channel State Information-Reference Signal (CSI-RS), Demodulation Reference Signal (DMRS) signals in SS / PBCH block (SSB), discovery reference signal (DRS), Cell Specific Reference Signal (CRS), Positioning Reference Signal (PRS), etc. RS may be periodic. For example, RS occasions carrying one or more RSs may occur with certain periodicity (e.g., 20 ms, 40 ms, etc.). The RS may also be aperiodic. Each SSB carries New Radio-Primary Synchronization Signal (NR-PSS), New Radio- Secondary Synchronization Signal (NR-SSS) and New Radio-Physical Broadcast Channel (NR- PBCH) in four successive symbols. One or multiple Synchronization Signal Blocks (SSBs) are transmitted in one SSB burst which is repeated with certain periodicity such as, for example, 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, and 160 ms. The UE is configured with information about SSB on cells of certain carrier frequency by one or more SSB measurement timing configuration (SMTC) configurations. The SMTC configuration comprising parameters such as SMTC periodicity, SMTC occasion length in time or duration, SMTC time offset with regard to reference time (e.g., serving cell’s SFN) etc. Therefore, SMTC occasion may also occur with certain periodicity (e.g., 5 ms, 10 ms, 20 ms, 40 ms, 80 ms, and 160 ms). Examples of uplink (UL) physical signals are reference signals such as Sounding (SRS), Demodulation Reference Signals (DMRS), etc. The term physical channel refers to any channel carrying higher layer information e.g. data, control etc. Examples of physical channels are Physical Broadcast Channel (PBCH), Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH), Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUSCH), Short PUSCH (sPUCCH), Short PDSCH (sPDSCH), Short PUCCH (sPUCCH), Short PUSCH (sPUSCH), MTC PDCCH (MPDCCH), Narrowband PBCH (NPBCH), Narrowband PDCCH (NPDCCH), Narrowband PDSCH (NPDSCH), Narrowband PUSCH (NPUSCH), Enhanced PDCCH (E-PDCCH), etc. The term time resource used herein may correspond to any type of physical resource or radio resource expressed in terms of length of time. Examples of time resources are: symbol, time slot, subframe, radio frame, Transmission Time Interval (TTI), interleaving time, slot, sub-slot, mini-slot, system frame number (SFN) cycle, hyper-SFN (H-SFN) cycle etc. The text refers to the term “L1 / L2 based inter-cell mobility” as used in the Work Item Description in 3GPP, though it interchangeably also uses the terms L1 / L2 mobility, L1-mobility, L1 based mobility, L1 / L2-centric inter-cell mobility, L1 / L2 inter-cell mobility L1 / L2-Triggered Mobility, Lower-layer triggered Mobility or LTM. The basic principle is that the UE receives a lower layer signaling from the network indicating to the UE a change (or switch or activation) of its serving cell (e.g., change of PCell, from a source to a target Pcell), wherein a lower layer signaling is a message / signaling of a lower layer protocol, which may be referred as a L1 / L2 inter- cell mobility execution command or LTM cell switch command. The change of serving cell (e.g., change of Pcell) may also lead to a change in Scell(s) for the same cell group such as, for example, in case the command triggers the UE to change to another cell group configuration of the same type (e.g., another MCG configuration). Before the UE receives the LTM cell switch command, the UE is configured by the network with one or more LTM candidate cell configurations (e.g., reception of an RRC Reconfiguration message, with at least one LTM candidate cell configuration) A LTM candidate cell configuration may include parameters in the IE CellGroupConfig per candidate cell and / or an embedded RRC Reconfiguration per LTM candidate cell. The term LTM cell switch procedure refers to the process of a UE switching (or changing) its cell from a source cell to a target cell (which may be called here an LTM candidate cell or a neighbour cell), using L1 / L2-triggered mobility (aLTM). In the context of L1 / L2-triggered mobility (LTM), an LTM cell switch may sometimes also be known as L1 / L2 based inter-cell mobility execution, LTM execution, dynamic switch, LTM switch, (LTM) cell switch, (LTM) serving cell change or (LTM) cell change. In the context of certain embodiments described herein, switching to the LTM candidate cell configuration comprises the UE considering that an LTM candidate cell becomes its new special cell (SpCell) such as, for example, Pcell in case of LTM being configured for a Master Cell Group (MCG) and / or PSCell in case of LTM being configured for a Secondary Cell Group (SCG); or, changing its SpCell from the current Pcell to an LTM candidate cell. Even where the term change of cell is used, it is recognized that this may include a change of a whole cell group configuration, which includes a change in the SpCell (e.g., change of Pcell or change of PSCell) and a change in Scells of the cell group (e.g., addition, modification and / or release of one or more Scells). An LTM cell switch procedure may be triggered in the UE by reception of an LTM cell switch command, or alternatively, triggered by some other event, such as a condition, such as, for example, a triggering condition used for conditional configuration, such as conditional handover, being fulfilled, as a result of recovery from radio link failure or handover failure. As used herein, the term LTM candidate cell refers to a cell that the UE is configured with when configured with L1 / L2-triggered mobility. Thus, a LTM candidate cell is a cell that the UE can move to in a LTM cell switch procedure, upon reception of a LTM cell switch command. These cells may also be called candidate cell(s), candidates, mobility candidates, non-serving cells, additional cells, target candidate cell, target candidate, etc. A LTM candidate cell is a cell for which the UE perform measurements (e.g., CSI measurements) so that the UE reports these measurements and the network may make educated decisions on which beam (e.g., TCI state) and / or cell the UE is to be switched to. An LTM candidate cell may be a candidate to be a target Pcell or PSCell, or an Scell of a cell group (e.g., MCG Scell). Certain embodiments described herein refer to at least one LTM candidate cell configuration and that the UE has received at least one LTM candidate cell configuration. This is also sometimes referred to as a configuration of an LTM candidate cell, which may be an RRC configuration, such as encapsulated in an RRC Reconfiguration message, that the UE receives when being configured with LTM. A LTM candidate cell configuration comprises the configuration that the UE needs to start to operate accordingly when it performs an LTM cell switch procedure to that LTM candidate cell as, for example, upon reception of the LTM cell switch command indicating the UE to perform a LTM cell switch procedure to that LTM candidate cell, which becomes the target cell and the current (new) SpCell, or an SCell in a serving frequency. The LTM candidate cell configuration comprises parameters of a serving cell (or multiple serving cells, such as a cell group), comprising one or more of the groups of parameters, such as an RRCReconfiguration message an IE CellGroupConfig or an IE SpCellConfig (or the IE SCellConfig, in the case of a SCell). A LTM candidate cell configuration may, in one example, comprise one or more of: i) the PCell configuration and one or more SCell configuration(s) of a Master Cell Group (MCG); i) the PSCell configuration and one or more SCell configuration(s) of a secondary Cell Group (SCG). The terms (LTM) candidate configuration, LTM configuration, (LTM) candidate target cell configuration, (LTM) target candidate (cell) configuration may be used interchangeably when referring to LTM candidate cell configuration. An LTM candidate cell configuration is associated with an identifier which is used in the signaling when referring to a certain LTM candidate cell configuration, such as when the UE receives the LTM candidate cell configuration and when the UE receives an LTM cell switch command indicating the UE to perform a LTM cell switch procedure to that LTM candidate cell. This identifier is sometimes known as the LTM candidate cell configuration identity or LTM candidate configuration index (or similar). The actual LTM candidate cell configuration and its exact content and / or structure of this IE and / or embedded message may be called an RRC model for the candidate configuration, or simply RRC model. An LTM candidate cell configuration comprises the configuration which the UE needs to operate accordingly when it performs (executes) L1 / L2 based inter-cell mobility execution to a LTM candidate cell, upon reception of the lower layer signaling (MAC CE) indicating a L1 / L2 based inter-cell mobility to a LTM candidate cell (which becomes the target cell and the current (new) PCell, or an SCell in a serving frequency), or upon reception of the lower layer signaling (MAC CE) indicating a L1 / L2 based inter-cell mobility to a LTM candidate cell configuration indicated with a candidate configuration index (sometimes also denoted candidate configuration ID). The UE may be configured with multiple LTM candidate cell configurations, so a Candidate Distributed Unit (DU) generates and sends to the Centralized Unit (CU) multiple configuration(s). The actual LTM candidate cell configuration the UE receives during the LTM configuration may be a delta signaling to be applied on top of a reference configuration, so that the actual configuration UE is to use in the candidate cell upon LTM cell switch is the combination of the LTM candidate cell configuration and the reference configuration (e.g. separately signaled by the network to the UE). Certain embodiments described herein refer to the UE having a stored LTM candidate cell configuration for an LTM candidate cell. A stored LTM candidate cell configuration for an LTM candidate cell may have been received when being configured with L1 / L2-Triggered Mobility, such as, for example, in an RRC Reconfiguration message that includes an LTM candidate cell configuration. The stored LTM candidate cell configuration may be a combination of a received LTM candidate cell configuration (which uses delta signaling) and the reference configuration (e.g., separately signaled by the network to the UE). The stored LTM candidate cell configuration may alternatively be obtained by the UE by other means, e.g. preconfigured, a default or specified configuration, restored after exiting idle mode or a UE power saving state such as transition from RRC_INACTIVE to RRC_CONNECTED state, read from a memory card or by other means been provided out-of-band outside of 3GPP specified interfaces or as user data. Certain embodiments refer to a report including the measurement results that is sent by the UE to the network, called a L1 report for LTM, LTM CSI measurement report, or CSI report for LTM. In this CSI LTM measurement report, the UE reports a list of identifiers (e.g., resource identifiers or resource indications), and each one of the identifiers point to a list of SSBs and LTM candidate cells where for example, ID1, is the first element of the list of LTM candidate cell and first element of the list of SSB. When the network receives the report, it means that the report SSB is the one identified by the first element of the list of SSB and belongs to the LTM candidate cell identified by the first element of the list of LTM candidate cells. This may also be called a resource identifier or indicator, such as an SSB resource Identifier (SSBRI), in the case of an RS being an SSB. An LTM candidate cell may also be an LTM candidate cell in a 5G Radio access technology, such as NR, or a 6G Radio Access Technology. Also, in the different embodiments, the co-called Reference Signal (RS) of an LTM candidate cell comprises an SSB and / or an RS transmitted in a beam or spatial direction, and / or a Mobility Reference Signal (MRS), a Channel State Information – RS (CSI-RS), or a RS defined for a 6G radio interface. As described above, certain when the number of LTM candidate cells indicated in the one or more LTM CSI resource(s) is higher than “L” and / or the number of SSBs per LTM candidate cell in the LTM CSI resource(s) is higher than “M”, so that the UE needs to select which LTM candidate cells and / or SSBs of these candidate cells, configured as the one or more LTM CSI resources, are to be included in the LTM CSI measurement report. Accordingly, methods and systems are provided that include criteria for a UE to include a sub-set of LTM candidate cells in an LTM CSI measurement report and, for each LTM candidate cell that is included, criteria for including a sub-set of configured SSBs. In a particular embodiment, including a cell and SSB comprises including an identifier of the SSB and / or LTM candidate cell (e.g., resource identifier) and associated measurement information. These criteria for selection are not specified in 3GGP specifications. However, according to various particular embodiments described herein the criteria may include, for example, one or more of: a) one or more measurement(s) of the LTM candidate cell(s) and / or the SSB(s) configured as LTM CSI resource(s), or of a serving cell; b) one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB; c) a synchronization state of an LTM candidate cell(s) and / or an SSB; d) an indication of relevance of an LTM candidate cell for the network; and e) a frequency and / or subcarrier spacing of an LTM candidate cell. For example, according to certain embodiments, a method is provided in a UE configured with one or more LTM candidate cell(s), wherein each LTM candidate cell is associated to one or more beams and / or reference signals (RSs) (e.g., Synchronization Signal Block(s) – SSB(s)). The method includes the UE selecting LTM candidate cells and associated SSBs to be included in an LTM CSI measurement report, when the number of LTM candidate cells indicated in an LTM CSI resource configuration is higher than the number of LTM candidate cells indicated to the reported in the associated LTM CSI reporting configuration. Similarly, according to certain embodiments, the UE selects SSBs per included LTM candidate cell when the number of SSBs for an included LTM candidate cell indicated in an LTM CSI resource configuration is higher than the number of SSBs indicated to the reported in the associated LTM CSI reporting configuration. According to certain embodiments described herein, a UE a configuration with one or more LTM CSI resource(s) and at least one LTM CSI Reporting configuration, and each LTM CSI resource comprises the indication of a Reference Signal (such as an SSB, or beam identifier, or CSI-RS resource identifier, or RS identifier) and an LTM candidate cell identifier e.g. LTM CSI resource #1 = (SSB=2, LTM candidate cell ID=2). The one or more LTM CSI resource(s) are associated to the at least one LTM CSI Reporting configuration, and the at least one LTM CSI reporting configuration indicates a number of “L” LTM candidate cells to be included in an LTM CSI measurement report (e.g. a subset among the configured LTM candidate cells) and a number “M” of SSBs for each LTM candidate cell to be included in the LTM CSI measurement report (e.g., a subset among the configured SSBs for the LTM candidate cell), and: i) the number of LTM candidate cells indicated in the one or more LTM CSI resource(s) is higher than “L” and / or ii) the number of SSBs per LTM candidate cell in the LTM CSI resource(s) is higher than “M”, wherein the UE includes (selects) the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on one or more criteria such as those described above and in more detail below.. Thus, according to certain embodiments, in response to a trigger to send a LTM CSI measurement report to the network (e.g., request from the network, or periodically transmit) in which the LTM CSI Reporting configuration indicates to be reported “L” LTM candidate cells and “M” of SSBs for each LTM candidate cell, the UE selects the LTM candidate cells and the SSBs for each LTM candidate cell(s) (i.e. the LTM CSI resource(s)) to be included in the report. In a particular embodiment, the UE selects the LTM candidate cells and the SSBs for each LTM candidate cells to be included in the LTM CSI measurement report according to one or more rules associated to the criteria defined above (e.g., measurements, configurations related to the LTM execution, synchronization state and / or indication of relevance of an LTM candidate cell, frequency). In a particular embodiment, the one or more LTM CSI resource(s) with which the UE is configured may be configured in an instance of the IE LTM-CSI-ResourceConfig-r18 (having an associated identifier (e.g., ltm-CSI-ResourceConfigId-r18) and being grouped in as a resource set (e.g., in the IE LTM-CSI-SSB-ResourceSet-r18). The UE receives the IE LTM-CSI- ResourceConfig-r18 in a reconfiguration message from the network such as, for example, in an RRCReconfiguration message. In a particular embodiment, the set may be structure as a first and a second list, wherein the first list comprises one or more SSB indexes and the second list comprises one or more LTM candidate cell identifiers (IDs), wherein the position in the list is associated to an LTM CSI resource in that LTM CSI resource configuration. For example, the instance of the IE LTM-CSI- ResourceConfig includes the following lists ltm-CSI-SSB-ResourceList-r18 and ltm- CandidateIdList-r18: ltm-CSI-SSB-ResourceList-r18 ltm-CandidateIdList-r18 ^ [SSB1] [LTM Candidate cell ID 1] ^ [SSB2] [LTM Candidate cell ID 1] ^ [SSB3] [LTM Candidate cell ID 1] ^ [SSB4] [LTM Candidate cell ID 1] ^ [SSB5] [LTM Candidate cell ID 1] ^ [SSB1] [LTM Candidate cell ID 2] ^ [SSB2] [LTM Candidate cell ID 2] ^ [SSB3] [LTM Candidate cell ID 2] ^ [SSB4] [LTM Candidate cell ID 2] ^ [SSB5] [LTM Candidate cell ID 2] ^ [SSB1] [LTM Candidate cell ID 3] ^ [SSB2] [LTM Candidate cell ID 3] ^ [SSB3] [LTM Candidate cell ID 3] ^ [SSB4] [LTM Candidate cell ID 3] ^ [SSB5] [LTM Candidate cell ID 3] ^ [SSB1] [LTM Candidate cell ID 4] ^ [SSB2] [LTM Candidate cell ID 4] ^ [SSB3] [LTM Candidate cell ID 4] ^ [SSB4] [LTM Candidate cell ID 4] ^ [SSB5] [LTM Candidate cell ID 4] ^ [SSB1] [LTM Candidate cell ID 5] ^ [SSB2] [LTM Candidate cell ID 5] ^ [SSB3] [LTM Candidate cell ID 5] ^ [SSB4] [LTM Candidate cell ID 5] ^ [SSB5] [LTM Candidate cell ID 5] In the example above, the LTM CSI resource configuration, including one or more LTM CSI resources includes 5 LTM candidate cell(s) and, for each LTM candidate cell 5 SSBs, making a total of 25 CSI LTM resources. The problem addressed herein occurs when the LTM CSI reporting configuration associated to that LTM CSI resource configuration indicates a number of LTM candidate cell(s) to be reported lower than 5 (e.g., L=2) and / or a number of SSBs per LTM candidate cell to be reported lower than 5 (e.g., M=3), so that the UE needs to select 4 x 4 = 16 of these 25 to be included. Further information about an LTM Candidate cell associated to an indicated LTM Candidate cell ID may be found by the UE in the other configuration(s) associated to the LTM candidate cell for that LTM candidate cell ID. In the example above, a resource indicator is associated to a position in the list(s) in which a resource is included. Each LTM CSI resource in the LTM CSI resource configuration (in particular in a resource set) has an associated resource indicator such as, for example, an SSB Resource Indicator (SSBRI), wherein SSBRI k (k ≥ 0) corresponds to the configured (k+1)-th entry of the associated [LTM-csi-SSB-ResourceList] in the corresponding [LTM-CSI-SSB-ResourceSet]. For example, SSBRI#0 corresponds to the configured 1-st entry of the associated [LTM-csi-SSB- ResourceList] in the corresponding [LTM-CSI-SSB-ResourceSet]. For example, the pair [SSB1], [LTM Candidate cell ID 1]; SSBRI#1 corresponds to the configured 2-nd entry (i.e., the pair [SSB2], [LTM Candidate cell ID 1]), etc. According to certain embodiments, an LTM CSI measurement report (which may also be called a CSI report, or CSI report for L1 / L2-triggered mobility, or L1 measurement report or L1 measurement report for LTM, or L2 measurement report) includes one or more resource indication(s). Each resource indication is associated to an LTM candidate cell identifier and a RS identifier of that LTM candidate cell such as, for example, an SSBRI associated to an LTM candidate cell ID and an SSB Index of the LTM candidate cell associated to the LTM candidate cell ID. When the UE includes an LTM candidate cell to be included in an LTM CSI measurement report, the UE includes an SSBRI associated to the selected LTM candidate cell. Taking the previous example, including LTM Candidate cell whose LTM candidate cell ID =2 means that the UE includes SSBRI#5 and / or SSBRI#6 and / or SSBRI#7 and / or SSBRI#8 and / or SSBRI#9, since: ^ [LTM Candidate cell ID 2] ^ [LTM Candidate cell ID 2] ^ [LTM Candidate cell ID 2] ^ [LTM Candidate cell ID 2] ^ [LTM Candidate cell ID 2] According to an LTM CSI measurement report includes measurement information associated to an LTM CSI resource which is included in the LTM CSI measurement report, for example, measurement information associated to an SSBRI, such as one or more of the following: ^ Layer 1 Reference Signal Received Power (L1-RSRP) ^ Differential L1-RSRP ^ Layer 1 Reference Signal Received Quality (L1-RSRQ) ^ Differential L1-RSRQ ^ Layer 1 Signal-to-Noise and Interference Ratio (L1-SINR) ^ Differential L1-SINR ^ Synchronization Signal (SS) Reference Signal Received Power (SS-RSRP) ^ SS Reference Signal Received Quality (SS-RSRQ) ^ SS Signal-to-Noise and Interference Ratio (SS-SINR) In one example, for L1-RSRP reporting, if the higher layer parameters [noOfReportedCells] and [noOfReportedRSPerCell] are both configured to be one, the reported L1-RSRP value is defined by a 7-bit value in the range [-140, -44] dBm with 1dB step size, or if any of the higher layer parameters [noOfReportedCells] and [noOfReportedRSPerCell] is configured to be larger than one, the UE uses differential L1-RSRP based reporting for the LTM CSI resources that the UE selects to be included in the LTM CSI measurement report, where the largest measured value of L1-RSRP is quantized to a 7-bit value in the range [-140, -44] dBm with 1dB step size, and the differential L1-RSRP is quantized to a 4-bit value. The differential L1-RSRP value is computed with 2 dB step size with a reference to the largest measured L1-RSRP value which is part of the same L1-RSRP reporting instance. For example, SS-RSRP maybe be as the linear average over the power contributions (in [W]) of the resource elements that carry secondary synchronization signals. The measurement time resource(s) for SS-RSRP are confined within SMTC window duration. If SS- RSRP is used for L1-RSRP as configured by reporting configurations as defined in 3GPP TS 38.214 v.18.4.0, the measurement time resources(s) restriction by SMTC window duration is not applicable. For SS-RSRP determination demodulation reference signals for PBCH and, if indicated by higher layers, CSI reference signals in addition to secondary synchronization signals may be used. SS-RSRP using demodulation reference signal for PBCH or CSI reference signal shall be measured by linear averaging over the power contributions of the resource elements that carry corresponding reference signals taking into account power scaling for the reference signals as defined in 3GPP TS 38.213 v.18.4.0. If SS-RSRP is not used for L1-RSRP, the additional use of CSI reference signals for SS-RSRP determination is not applicable. According to certain embodiments, SS-RSRP is measured only among the reference signals corresponding to SSBs with the same SSB index and the same physical-layer cell identity. If SS-RSRP is not used for L1-RSRP and higher-layers indicate certain SSBs for performing SS-RSRP measurements, then SS-RSRP is measured only from the indicated set of SSB(s). For frequency range 1, the reference point for the SS-RSRP shall be the antenna connector of the UE. For frequency range 2, SS-RSRP shall be measured based on the combined signal from antenna elements corresponding to a given receiver branch. For frequency range 1 and 2, if receiver diversity is in use by the UE, the reported SS-RSRP value shall not be lower than the corresponding SS-RSRP of any of the individual receiver branches. The number of resource elements within the measurement period that are used by the UE to determine SS-RSRP is left up to the UE implementation with the limitation that corresponding measurement accuracy requirements have to be fulfilled. The power per resource element is determined from the energy received during the useful part of the symbol, excluding the Cyclic Prefix (CP). According to certain embodiments, when the UE selects the LTM candidate cell(s) and respective RSs (e.g., SSB(s)) to include in the LTM CSI measurement report, the UE includes an SSBRI associated to a selected LTM CSI resource (i.e., pair SSB index, LTM candidate cell ID), and a measurement information associated L1-RSRP and / or differential L1-RSRP), in the following mapping order shown in Table 1: Table 1: Mapping order of CSI fields of one report for SSBRI / RSRP reporting for L1 / L2-triggered mobility CSI report number CSI fields SSBRI #1 as in Table 6.3.1.1.2-6, if reported SSBRI #2 as in Table 6.3.1.1.2-6, if reported … CSI report #n SSBRI # ^^ ൈ ^^ as in Table 6.3.1.1.2-6, if reported RSRP #1 as in Table 6.3.1.1.2-6, if reported Differential RSRP #2 as in Table 6.3.1.1.2-6, if reported … Differential RSRP # ^^ ൈ ^^ as in Table 6.3.1.1.2-6, if reported NOTE: L is the number of reported cells provided by higher layer parameter noOfReportedCell and M is the number of reported SSBRI / RSRP pairs per cell and equal to the value provided by higher layer parameter nrofReportedRSPerCell. One example of the bitwidth for SSBRI, RSRP, differential RSRP to be included in an LTM CSI measurement report is shown below in Table 2: Table 2: Example Bitwidth […] […] SSBRI^log2^KSSBs^^RSRP 7 Differential RSRP 4 […] […] ereKSSB whsis the configured number of SSBs in the corresponding LTM CSI resourceconfiguration (e.g., within a resource set) for reporting an RSRP (e.g., 'ssb-Index-RSRP'.). According to certain embodiments, the UE selects the LTM candidate cells to be included in an LTM CSI measurement report based on the one or more criteria (e.g., a, b, c, d, e, which are described above) when the number of configured LTM candidate cell(s) in the one or more LTM CSI resource(s) associated to the at least one LTM CSI Reporting configuration, is higher than the number of “L” LTM candidate cells to be included in an LTM CSI measurement report triggered by the LTM CSI Reporting configuration. In a particular embodiment, the UE selects the LTM candidate cells to be included in an LTM CSI measurement report based on the one or more criteria (e.g., a, b, c, d, e), when the number of LTM CSI resources in the one or LTM CSI resource(s) associated to the at least one LTM CSI Reporting configuration is higher than the number of “L” LTM candidate cells to be included in an LTM CSI measurement report multiplied by the number of “M” RSs per LTM candidate cell to be included in an LTM CSI measurement report triggered by the LTM CSI Reporting configuration. In particular embodiments, when including in the LTM CSI measurement report a subset of the LTM candidate cell(s) and / or the RS(s) (e.g., SSBs, of the LTM candidate cells (or the LTM CSI resource(s)), the UE includes a resource indicator associated to an LTM CSI resource (e.g., SSBRI), and / or to an LTM candidate cell and / or to a RS. The resource indicator may correspond to or comprise a position in a list of the RS identifier(s) in the CSI resource configuration associated to the identifier of the RS that is being included. The resource indicator may comprise a position in a list of the LTM candidate cell(s) in the CSI resource configuration associated to the identifier of the LTM candidate cell that is being included. The UE including the LTM CSI measurement report a subset of the LTM candidate cell(s) and / or the RS(s) (e.g., SSBs, of the LTM candidate cells (or the LTM CSI resource(s)) comprises including measurement information associated to an LTM CSI resource (e.g., L1-RSRP or differential L1-RSRP). In particular embodiments, the UE selects the RS(s), such as, for example, SSBs, of an LTM candidate cell included in the LTM CSI measurement report, based on the one or more criteria (e.g., a, b, c, d, e) when, for the LTM candidate cell, the number of RS(s) e.g. SSBs, configured as LMT CSI resources, is higher than the number of “M” RSs (e.g. SSBs) indicated in the associated LTM CSI Reporting configuration which triggers the LTM CSI measurement report. In a particular embodiment, after transmitting the LTM CSI measurement report the UE transmits a second LTM CSI measurement report triggered by the same LTM CSI reporting configuration, wherein the UE includes at least one LTM candidate cell(s) and / or RS(s) which differs from the ones transmitted in the LTM CSI measurement report transmitted before. In this case, the UE tries to enrich the information reported to the network by changing the information reported in multiple reports triggered by the same LTM CSI reporting configuration. In a further particular embodiment, the second LTM CSI measurement report is triggered according to the CSI reporting configuration indicating the transmission of periodic reports. In particular embodiments, the UE LTM candidate cell(s) and one or more RS(s) (e.g., SSBs) to be included in the LTM CSI measurement report comprise one or more of: ‐ the UE first selecting which LTM candidate cell to be included and, for each candidate cell, then selecting which RSs e.g. SSBs to be included (together with the RSRP measured for each SSB); ‐ the UE first selecting which RSs (e.g. SSBs) to be included (based on the measured RSRP) and then selecting which LTM candidate cell to be included based on the selected SSBs; ‐ the UE selecting one or more LTM candidate cell and one or mode SSBs independently. Notice that here the UE may rely on first criteria to select LTM candidate cells and, once LTM candidate cells are included, the UE relies on a second criteria for including RSs (e.g., SSBs) of the selected LTM candidate cells, in a particular embodiment. In a particular embodiment, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on a) one or more measurement(s) of the LTM candidate cell(s) and / or the SSB(s) configured as LTM CSI resource(s), and / or measurements of a serving cell, which may correspond, for example, to the certain rules such as, for example, rules 1), 2), 3), 8), 21), 22), 23) and 24) further described in more detail below: ‐ The measurement quantity which the UE uses for the selection may correspond to an RSRP measurement, such as a L1-RSRP, SS-RSRP, when the RS is an SSB, or CSI-RSRP in the case the RS is a CSI-RS, or a beam- based RSRP. ‐ The measurement quantity which the UE uses for the selection may be the one indicated in the associated LTM CSI reporting configuration e.g. as reporting quantity, such as SSB index RSRP. ‐ The measurement quantity which the UE uses for the selection may be the one which the UE uses for reporting e.g. L1-RSRP, or differential L1- RSRP. ‐ The measurement quantity which the UE uses for the selection may correspond to an RSRQ measurement, such as a L1-RSRQ, SS-RSRQ, CSI- RSRQ in the case the RS is a CSI-RS, or a beam-based RSRQ. ‐ The measurement quantity the UE uses for the selection may correspond to an SINR measurement, such as a L1-SINR, SS-SINR, CSI- SINR in the case the RS is a CSI-RS, or a beam-based SINR. ‐ One benefit of the criteria is that it relies on lower layer measurements (e.g. L1-RSRP, or differential RSRP) of LTM candidate cells, and the network relies on that measurement for determining which LTM candidate cell should be a target cell for an LTM cell switch. Thus, when the UE orders or ranks the LTM candidate cell(s) which can detect, based on the lower layer measurement quantity value (e.g., L1-RSRP), which is also meant to be used by the network for the LTM cell switch, and selects the subset of “L” cells (among the LTM candidate cells in the LTM CSI resource configuration) based on that same metric, that is equivalent to what the network would likely do in case he network would have the possibility to receive more cells in the LTM CSI measurement report. In a particular embodiment, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on an indication of relevance of an LTM candidate cell for the network, which may correspond to, for example, the rules 4), 15), 16) and 17) further described below. In a particular embodiment, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB, which may correspond to, for example, the rules 9), 10), 11), 12), 13), 14), 25), 26), 27) further described below. In a particular embodiment, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on a synchronization state of an LTM candidate cell(s) and / or an SSB, which may correspond to, for example, the rules 5, 6) and 7) further described below. In a particular embodiment, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on a frequency and / or subcarrier spacing of an LTM candidate cell, which may correspond to, for example, the rules 28) and 29) further described below. In a particular embodiment, the UE the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more time domain properties of the SSBs transmitted by an LTM candidate cell, which may correspond to, for example the rule 26) further described below. In a particular embodiment, when including the LTM candidate cell and an associated SSB in the LTM CSI measurement report, the UE includes a resource indicator (e.g., SSBRI) associated to an LTM candidate cell and SSB in the LTM CSI resource configuration. In a particular embodiment, when including the LTM candidate cell and an associated SSB in the LTM CSI measurement report, the UE includes measurement information associated to the resource indicator (e.g., SSBRI), i.e., associated to an LTM candidate cell and SSB in the LTM CSI resource configuration. In a particular embodiment, the UE performs the selection according to a 2-step process. In the first step, the UE selects which LTM candidate cells are included in the report, and in the second step, the UE selects which SSBs are included in the report for the selected LTM candidate cells in the first step. Alternatively, in the first step the UE selects which SSBs to be included in the measurement report, and then in the second step, the UE includes the LTM candidate cells related to the selected SSBs in the first step. In another particular embodiment, the UE performs the selection according to a 1-step process. This means that the UE considers only the LTM candidate cells for evaluating one or more rules for the selection. Alternatively, the UE considers only the SSBs for evaluating one or more rules for the selection. Alternatively, the UE considers both the LTM candidate cells and SSBs (together) for evaluating one or more rules for the selection. In a particular embodiment, the UE is configured with at least a configuration to perform measurements (L1 measurements), which comprises a list of LTM candidate cells and for each LTM candidate cell a list of SSBs. In response to a trigger to send to the network a report that includes measurement results for one or more LTM candidate cells, the UE selects one or more LTM candidate cells and one or more SSBs associated to the selected LTM candidate cells to be included in the measurement report, according to one or more rules: ‐ For example, as one option, the UE first select which LTM candidate cell to be included and for each candidate cell then selects which SSB to be included (together with the RSRP measured for each SSB). ‐ As another example, in the UE first select which SSB to be included (based on the measured RSRP) and then selects which LTM candidate cell to be included based on the selected SSBs. ‐ In yet another option, the UE selects one or more LTM candidate cell and one or mode SSBs independently. In a particular embodiment, in response to a trigger to send a report to the network which include measurement results for one or more LTM candidate cells, the UE selects one or more LTM candidate cells and one or more SSBs associated to the selected LTM candidate cells to be included in the measurement report, according to one or more rules. Once with the UE has selects the LTM candidate cell and the SSBs for each candidate cell to include in the measurement report, the UE sends the measurement report to the network. In a particular embodiment, the UE selects the LTM candidate cells and the SSBs for each LTM candidate cells to be included in the measurement report according to one or more rules. According to various embodiments, the one or more rules may include one or more or any combination of the following: 1) In a particular embodiment the UE selects an LTM candidate cell based on one or more measurements, performed on a measurement quantity, wherein the UE includes the LTM candidate cells with the highest measurement quantity value of its RS such as, for example, the highest RSRP measured on an SSB. ^ According to this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on one or more measurement(s) of the LTM candidate cell(s) and / or the SSB(s) configured as LTM CSI resource(s). ^ In a particular embodiment, the UE measures the measurement quantity (e.g., L1-RSRP, SS-RSRP) on the detected SSBs for multiple configured LTM candidate cells in the LTM CSI resource configuration and orders the LTM candidate cell(s) based on the highest measured RSRP of the SSB of each LTM candidate cell which is in the CSI resource configuration and which the UE detects it. Once ordered or ranked, the UE selects the LTM candidate cells with highest measurement quantity, up to the number “L” LTM candidate cells to be reported, configured in the LTM CSI reporting configuration. In this example, the highest SSB is used as the measurement for an LTM candidate cell for the ordering, before the selection. ^ In a further particular embodiment, the UE measures the detected SSBs among the ones configured as LTM CSI resources for a particular LTM candidate cell. One benefit is that the UE does not need to measure all SSBs of an LTM candidate, but only the ones the network configures to be relevant for LTM cell switch. ^ In a further particular embodiment, the UE measures all detected SSBs, including SSBs which are not among the ones configured as LTM CSI resources for a particular LTM candidate cell. One benefit is that this is a better representation of a cell, than selecting a sub-set of SSBs, which may be beneficial in case the network is not aware of the best SSBs to be configured such as, for example, in an initial phase in which the network is not yet optimized for LTM. ^ In a particular embodiment, the UE measures the measurement quantity (e.g., L1-RSRP, SS-RSRP) on the detected SSBs for multiple configured LTM candidate cells in the LTM CSI resource configuration. Then, the UE selects the LTM candidate cell with the highest number of SSBs above a threshold. One benefit is that selecting LTM candidate cells with the highest number of “good” SSBs means that these are cells the network is likely to select for LTM cell switch ( i.e., these are cells the network would like the UE to report). ^ In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell. For example, the UE may select the SSBs whose RSRP have the highest values. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ In a particular UE measures the measurement quantity (e.g., L1-RSRP, SS-RSRP) on the detected SSBs for multiple configured LTM candidate cells in the LTM CSI resource configuration and orders the LTM candidate cell(s) based on the highest measured RSRP of the SSB of each LTM candidate cell which is in the CSI resource configuration and which the UE detects it. The UE also measures the measurement quantity (e.g., L1-RSRP, SS- RSRP) on the detected SSBs for the SpCell (e.g., PCell, in the case of MCG LTM). ^ In a further particular embodiment, the UE selects the LTM candidate cells which have the measurement quantity higher than the measurement quantity of the SpCell to be ranked or ordered. ^ In a further particular embodiment, the UE selects the LTM candidate cells which have the measurement quantity an offset higher than the measurement quantity of the SpCell to be ranked or ordered. The offset may be, for example, the same one configured in an A3 event (e.g., associated to a measurement object in the same SSB frequency as the LTM candidate cell for which the comparison is being performed). ^ According to certain embodiments, once ordered or ranked, the UE selects the LTM candidate cells with measurement quantity, up to the number “L” LTM candidate cells to be reported, configured in the associated LTM CSI reporting configuration. In this example, the highest SSB is used as the measurement for an LTM candidate cell for the ordering, before the selection. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated report (e.g. periodically or aperiodic), so we can evaluate the content of the report. The power of each LTM candidate cell in the lab setup can be adjusted (which should define the RSRP), so as to be aware in the test which LTM candidate cells should have strongest radio conditions (e.g., RSRP), and, also having the content of the report, it may be determined whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s). ^ An alternative test is to configure an additional LTM CSI measurement report, triggered shortly before and / or after in time compared to the previous LTM CSI measurement report, but this time with an associated LTM CSI reporting configuration with L = L1. In that case, the lab network has the content of both reports, and can determine whether the second report is filled in according to the rule(s), where the rules can be reverse engineered based on the content of the second report (which would include measurements of all configured LTM candidate cells). 2) In a particular embodiment, the UE selects an LTM candidate cell based on the order of appearance according to the list of SSBs ordered according to the highest measurement quantity value (e.g. RSRP) measured. ^ According to this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on one or more measurement(s) of the LTM candidate cell(s) and / or the SSB(s) configured as LTM CSI resource(s). ^ One benefit of this rule is that UE have to measure first all the SSBs and then, once that all the SSBs have been measured and ranked according to the measured RSRP, then the LTM candidate cells are chosen according to the best SSBs measured. ^ In a particular embodiment, the UE measures first the SSBs configured as LTM CSI resources, regardless to which LTM candidate cell they belong. Once all the SSBs have been ordered based on the highest RSRP measured, the UE selects the LTM candidate cell based on the order of appearance in the list. For example, assuming that RSRP Xn> RSRP Xn+1, we have: o SSB1, RSRP X, LTM candidate cell ID 1 o SSB6, RSRP X2, LTM candidate cell ID 1 o SSB3, RSRP X3, LTM candidate cell ID 4 o SSB5, RSRP X4, LTM candidate cell ID 2 o SSB4, RSRP X5, LTM candidate cell ID 2 o SSB2, LTM candidate cell ID 1 o SSB4, RSRP X7, LTM candidate cell ID 3 o SSB1, RSRP X8, LTM candidate cell ID 3 ^ In this example, the UE selects the LTM candidate cells in the order of ID1 first (with SSB1, SSB6, SSB2), ID4 second (with SSB3), ID2 third (with SSB5, SSB4), and ID3 forth (with SSB4, SSB1). ^ In a further particular embodiment, when only a subset of these may be reported, for example L=2, the UE includes the LTM CSI measurement report LTM candidate cell ID 1 and LTM candidate cell ID 2 (e.g., the SSBRI associated to these LTM candidate cells). In that case, when M=1, the UE includes information on the following LTM CSI resources: LTM Candidate cell ID 1 (SSB1), LTM Candidate ID ID4 (with SSB3). ^ SSB selection: In a further particular embodiment, when the UE selects which LTM candidate cells to include int he LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ Testability / detectability: A similar lab set as rule 1) may be used, so the UE is configured with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. To verify that the UE selects the LTM candidate cell(s) according to the rule, an additional LTM CSI measurement report is configured and triggered shortly before and / or after in time compared to the previous LTM CSI measurement report, but this time with an associated LTM CSI reporting configuration with L = L1. ‐ 3) In a particular embodiment, the UE selects an LTM candidate cell based on an average measurement quantity value (e.g., average RSRP) measured on the detected SSBs of an LTM candidate cell. ^ In this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on one or more measurement(s) of the LTM cell(s) and / or the SSB(s) configured as LTM CSI resource(s). ^ In a particular embodiment, the UE averages RSRP (e.g., L1-RSRP, SS-RSRP, differential L1-RSRP) on the detected SSBs of the LTM candidate cell(s) configured as an LTM CSI resource, and then it orders the LTM candidate cells to be measured based on the average RSRP calculated per LTM candidate cell configured as an LTM CSI resource. Then, the UE includes in the LTM CSI measurement report the cells with highest average RSRP (up to the value L configured in the LTM CSI reporting configuration). ^ For example, for an average RSRP Xn > average RSRP Xn+1, we have: ^ Average RSRP X, LTM candidate cell ID 1 ^ Average RSRP X2, LTM candidate cell ID 4 ^ Average RSRP X3, LTM candidate cell ID 7 ^ Average RSRP X4, LTM candidate cell ID 6 ^ Average RSRP X5, LTM candidate cell ID 2 ^ Average RSRP X6, LTM candidate cell ID 3 ^ Average RSRP X7, LTM candidate cell ID 5 ^ Average RSRP X8, LTM candidate cell ID 8 ^ For L=4 in the LTM CSI reporting configuration, the UE includes LTM Candidates cells whose IDs are 1, 4, 7, 6. Based on that, the UE may also select the SSBs of the LTM Candidate cells whose IDs are LTM Candidates cells whose IDs are 1, 4, 7, 6 to be included in the LTM CSI measurement report. ^ In a further particular embodiment, the average is an arithmetic average, or a weighted average. ^ In a further particular embodiment, the UE measures the detected SSBs among the ones configured as LTM CSI resources for a particular LTM candidate cell for performing the average defined by the rule. One benefit is that the UE does not need to measure all SSBs of an LTM candidate, but only the ones the network configures to be relevant for LTM cell switch. ^ In a further particular the UE measures all detected SSBs, including SSBs which are not among the ones configured as LTM CSI resources for a particular LTM candidate cell, for performing the average defined by the rule. One benefit is that this is a better representation of a cell, than selecting a sub-set of SSBs, which may be beneficial in case the network is not aware of the best SSBs to be configured (e.g., in an initial phase in which the network is not yet optimized for LTM). ^ In a further particular embodiment, the UE performs an average of measurement quantity values when the Measurement Object associated to one or more LTM candidate cell(s), also define the usage of an average (e.g., when a number of beams / SSBs to average is included in the measurement object), otherwise the UE uses the highest measurement quantity value. ^ One benefit of using an average of a measurement quantity for selecting the LTM candidate cell to include in the report, such as, for example, instead of the highest SSB value, is that this has a better representation of the overall LTM candidate cell, which might be what the network also uses for selecting an LTM candidate cell for LTM cell switch. ^ In another particular embodiment, the UE selects an LTM candidate cell based according to the average RSRP measured on the SSBs with an RSRP value above a certain threshold that belong to an LTM candidate cell. ^ In a particular embodiment, the UE measures the average RSRP on the SSBs with an RSRP value above a certain threshold belonging to a given LTM candidate cell and then it orders all the LTM candidate cells to be measured based on the average RSRP calculated. For example: ^ Average RSRP X, LTM candidate cell ID 1 ^ Average RSRP X2, LTM candidate cell ID 4 ^ Average RSRP X3, LTM candidate cell ID 7 ^ Average RSRP X4, LTM candidate cell ID 6 ^ Average RSRP X5, LTM candidate cell ID 2 ^ Average RSRP X6, LTM candidate cell ID 3 ^ Average RSRP X7, LTM candidate cell ID 5 ^ Average RSRP X8, LTM candidate cell ID 8 Wherein the average RSRP is calculated only using the SSBs where the RSRP is above a certain threshold. ^ In a particular embodiment, the threshold is configured in the measurement object associated to the SSB frequency of the LTM candidate cell for which the average is being performed. ^ In a particular embodiment, the average is the cell quality of the LTM candidate cell, calculated as defined in 3GPP TS 38.331 v.18.3.0. ^ It may be advantageous to calculate the average RSRP using only the SSBs with an RSRP value above a threshold, since the RSRP measurement is inaccurate for low RSRP values, meaning that these measurements are unreliable. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include int he LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ Testability / detectability: A similar lab set as rule 1) may be used, so the UE is configured with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. To verify that the UE selects the LTM candidate cell(s) according to the rule, an additional LTM CSI measurement report is configured and triggered shortly before and / or after in time compared to the previous LTM CSI measurement report, but this time with an associated LTM CSI reporting configuration with L = L1. In the particular case of rule 3), the test may use the content of the second report and process it according to the rule, e.g. to determine the average of reported SSBs. ‐ 4) In a particular embodiment, the UE selects an LTM candidate cell based on the number of appearances an LTM candidate cell and / or the number of resources per cell is within a list of LTM CSI resources. ^ In this rule, the UE includes LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on d) an indication of relevance of an LTM candidate cell for the network. In other words, the number of times that an LTM candidate cell appears in the LTM CSI resources (associated to an LTM CSI reporting configuration) indicates some kind of importance to the UE about the LTM candidate cell to the network. ^ The number of appearances in this case means that more SSBs are configured for these cells, so another way to formulate the rule is to say that the UE selects LTM candidate cells with the highest number of SSBs configured in the LTM CSI resources. ^ For example, when the LTM CSI resources are defined as below, the UE is indicated that the LTM candidate cell whose LTM Candidate cell ID is set to 1 is more important than all the other configured LTM candidate cells; thus, the UE includes LTM Candidate cell whose ID is 1. The inclusion of other cells may be based on some of the other rules (e.g., one of the other rules), since they have same number of resources defined. ltm-CSI-SSB-ResourceList-r18 ltm-CandidateIdList-r18 [SSB1] [LTM Candidate cell ID 1] [SSB2] [LTM Candidate cell ID 1] [SSB3] [LTM Candidate cell ID 1] [SSB4] [LTM Candidate cell ID 1] [SSB5] [LTM Candidate cell ID 1] [SSB1] [LTM Candidate cell ID 2] [SSB2] [LTM Candidate cell ID 2] [SSB1] [LTM Candidate cell ID 3] [SSB2] [LTM Candidate cell ID 3] [SSB1] [LTM Candidate cell ID 4] [SSB2] [LTM Candidate cell ID 4] [SSB4] [LTM Candidate cell ID 5] [SSB5] [LTM Candidate cell ID 5] Notice that this the LTM candidate cell whose ID is set to 1, is also the LTM candidate cells with more LTM CSI resources being configured (e.g., [SSB1], [SSB2], [SSB3], [SSB4], [SSB5]). ^ In a particular embodiment, the UE counts the appearance of an LTM candidate cell in an LTM CSI resource configuration (e.g., instance of the IE LTM-CSI- ResourceConfig associated to the LTM CSI reporting configuration triggering the LTM CSI measurement report). This is because the network can configure a maximum of 112 LTM CSI resources and each may contain different LTM candidate cells and for each LTM candidate cell a different number of SSBs. Or, in other words, the UE selects an LTM candidate cell based on the number of appearances of an SSB of an LTM candidate cell is within a list of resource configurations (e.g., appearances of an SSB for a given LTM candidate cell in an LTM-CSI-ResourceConfig IE received by the network). ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include int he LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell e.g. the SSBs whose RSRP have the highest values. ^ One benefit of this rule for selecting LTM candidate cells to include in the LTM CSI measurement report is that the UE reports what the UE understands as more important to the network, which means that the network is more aware of LTM candidate cells which are considered more important, compared to others. ^ Testability / detectability: The UE may be configured in a lab setup with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. In the lab set the LMT CSI resources may have a pattern with cells having a highest number of appearances. Then, in the test we may lower the power of these cells, compared to other cells, and observe whether the UE is anyways reporting these cells with more appearances, even when they are not among the cells with highest power in their SSBs. Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. ‐ 5) In a particular embodiment, the UE selects an LTM candidate cell based on whether the early UL sync has been configured and / or triggered for an LTM candidate cell. ^ In this rule, the UE is further configured for performing early UL sync with a subset of one or more LTM candidate cells the UE is configured with. For the cells in this subset the UE receives a UL channel configuration (Random Access configuration) and transmits an UL preamble to an LTM candidate cell upon reception of a Physical Downlink Control Channel (PDCCH) order (after reception of the Random Access configuration). Thanks to the transmission of the UL preamble the network calculates a Timing Advance value for that UE and the corresponding LTM candidate cell(s), so that when LTM cell switch is triggered the TA value may be included in the LTM cell switch command and the UE may perform an LTM cell switch without the need of a random access procedure, which reduces the mobility interruption time compared to a procedure based on random access. ^ In a particular embodiment, the UE includes in an LTM measurement report the LTM candidate cells for which the UE has been configured to perform UL pre- sync. These may be the LTM candidate cells for which the LTM candidate configuration includes the Random Access configuration for UL early sync e.g. the IE EarlyUL-SyncConfig used to configure random access resources for the early UL synchronization procedure, included in the IE LTM-Candidate. In one option, the UE includes in an LTM measurement report the LTM candidate cells for which the UE has been configured to perform UL pre-sync and for which the UE has received a trigger (e.g., PDCCH order) for transmitting an UL preamble for UL early sync. ^ In a particular embodiment, the UE selects the cells with highest number of times a PDCCH order has been received in order to initiate a random access procedure toward an LTM candidate cell to initiate a TA acquisition procedure (UL early sync). ^ In a particular embodiment, the UE selects the cells to include in the LTM CSI measurement reports the cells for which the UE is UL synchronized, even without the need to perform UL early sync e.g. in case a candidate is co-located with a current serving cell, or depending on other deployment characteristics of the LTM candidate cell compared to one or more serving cells the UE is configured with. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell e.g. the SSBs whose RSRP have the highest values. ^ SSB selection: In another particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs associated to the Random Access resources which were used when the UE has transmitted the UL preamble for UL early sync. ^ One benefit of this rule for selecting LTM candidate cells to include in the LTM CSI measurement report is that the UE reports what the network is more likely to select as a cell for LTM cell switch, since the network may trigger UL early sync also based on measurements, also for cells more likely to be target cells in an LTM cell switch. A similar benefit exists for the SSB selection based on UL early sync. ^ Testability / detectability: The UE may be configured in a lab setup with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells, and only L cells being configured with UL early sync. Then, fewer than L1 LTM candidate cells may be configured for early UL sync. ^ Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. Based on the content of the report we determine whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s) (i.e., whether the included cells are the cells for which the UE has been configured for UL early sync and / or cells for which the UE has been triggered to transmit the UL preamble for UL early sync). ‐ 6) In a particular embodiment, the UE selects an LTM candidate cell based on whether an early TCI state activation has been configured and / or triggered for an LTM candidate cell. ^ In this case the UE is further configured to perform early TCI state activation (early DL sync) with a subset of one or more LTM candidate cells the UE is configured with (or, in particular with SSBs of an LTM candidate cell). For the cells in this subset the UE receives a TCI state configuration. The UE may further receive a lower layer signaling for triggering the activation of a TCI state included in the TCI state configuration of an LTM candidate cell, before the UE receives a lower layer signaling for LTM cell switching. The early TCI state activation to an LTM candidate cell reduces the interruption time when the UE receives an LTM cell switch compared to a procedure to a cell for which early TCI state activation has not been triggered. ^ In a particular embodiment, the UE includes in an LTM measurement report the LTM candidate cells for which the UE has been configured to perform early TCI activation. These may be the LTM candidate cells for which the LTM candidate configuration includes the TCI state configuration for early TCI activation (e.g., the IE CandidateTCI-State defining TCI states configurations which includes QCL- relationships between the DL RSs in one RS set and the PDSCH DMRS ports; or the IE CandidateTCI-UL-States defining a group of one or more uplink TCI states configurations. In one option, the UE includes in an LTM measurement report the LTM candidate cells for which the UE has been configured to perform early TCI state activation and for which the UE has received a trigger (e.g., MAC Control Element) for a TCI state activation (which may be for a sub-set of LTM candidate cell(s) for which early TCI state has been configured). ^ In a particular embodiment, the UE selects the cells with highest number of times a trigger for TCI state activation (e.g., MAC CEs) has been received. ^ In a particular embodiment, the UE selects the cells to include in the LTM CSI measurement reports the cells for which the UE is DL synchronized, even without the need to perform early TCI state activation e.g. in case a candidate is co-located with a current serving cell, or depending on other deployment characteristics of the LTM candidate cell compared to one or more serving cells the UE is configured with. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ SSB selection: In another particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs configured for early TCI state activation. In a sub-option, the UE further selects the SSBs indicated in the lower layer signaling (e.g., Candidate Cell TCI States Activation / Deactivation MAC CE, reproduced below) triggering early TCI state activation. ******************************************************************* The Candidate Cell TCI States Activation / Deactivation MAC CE is identified by a MAC subheader with eLCID and has a variable size consisting of following fields: - Candidate Cell ID: This field indicates the identity of an LTM candidate Cell for which the MAC CE applies. - Pi: This field indicates whether each TCI codepoint has multiple TCI states or a single TCI state. If the Pi field is set to 1, the ithTCI codepoint includes the DL TCI state and the UL TCI state. If the Pi field is set to 0, the ithTCI codepoint includes only the DL / joint TCI state or the UL TCI state. The codepoint to which a TCI state is mapped is determined by its ordinal position among all the TCI state ID fields; - D / U: This field indicates whether the TCI state ID in the same octet is for a joint / downlink or an uplink TCI state. If this field is set to 1, the TCI state ID in the same octet is for joint / downlink. If this field is set to 0, the TCI state ID in the same octet is for uplink; - TCI state ID: This field indicates the TCI state identified by TCI-StateId or TCI- UL-StateId as specified in 3GPP TS 38.331 v.18.3.0. If D / U is set to 1, 7-bits length TCI state ID i.e. TCI-StateId as specified in 3GPP TS 38.331 v.18.3.0 is used. If D / U is set to 0, the most significant bit of TCI state ID is considered as the reserved bit and remaining 6 bits indicate the TCI-UL-StateId as specified in 3GPP TS 38.331 v.18.3.0. The maximum number of activated TCI states is 16; - R: Reserved bit, set to 0. FIGURE 1 illustrates an example Candidate Cell TCI States Activation / Deactivation MAC CE 100, according to certain embodiments. ****************************************************************** ^ One benefit of this rule for selecting LTM candidate cells to include in the LTM CSI measurement report is that the UE reports LTM candidate cells for which the UE would spend less time doing the LTM cell switch in case the network triggers a cell switch for one of the reported cells. These are also what the network is more likely to select as a cell for LTM cell switch, since the network configures and / or triggers early TCI state activation based on measurements, likely when it is close to trigger an LTM cell switch for cells which network believes are more likely to be the target cell in the LTM cell switch. A similar benefit exists for the SSB selection based on early TCI state activation. ^ Testability / detectability: The UE may be configured in a lab setup with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells, and only L cells being configured with early TCI state activation (sometimes called DL pre- sync). ^ Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. Based on the content of the report we determine whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s) (i.e., whether the included cells are the cells for which the UE has been configured for early TCI activation and / or cells for which the UE has been triggered activate the TCI state (when lab set transmits the MAC CE for TCI activation)). ‐ 7) In a particular embodiment, the UE selects an LTM candidate cell based on whether both an early UL sync and an early TCI state activation procedure have been configured and / or triggered for an LTM candidate cell. ^ The configuration of early UL sync and early TCI state activation, and the triggering have been explained in rules 5) and 6). ^ In one embodiment, the UE in an LTM CSI measurement report an LTM candidate cell for which the UE has been configured with both early UL sync and early TCI state activation. ^ In a particular embodiment, the UE includes in an LTM CSI measurement report an LTM candidate cell for which the UE has been configured with both early UL sync and early TCI state activation, and for which both have been triggered. ^ In a particular embodiment, the UE ranks LTM candidate cells based on whether the cell is a cell for which the UE has been configured and / or triggered with early UL sync and / or early TCI state activation. The cells on top of the rank (rank 1) would be the cells in which both has been configured and triggered. The cells below that rank (rank 2) are the LTM candidate cells for which both were configured, and only early UL sync is triggered. The cells below that rank (rank 3) are the LTM candidate cells for which both were configured, and only early TCI state activation is triggered. The cells below that rank (rank 4) are the LTM candidate cells for which both were configured, but had no triggering of early TCI state activation and no triggering of early UL sync. Based on the rank, the UE selects the cells to include in the LTM CSI measurement report, starting by including cells in rank 1 (if any), followed by rank 2 (if any), followed by rank 3 (if any), followed by rank 4 (if any). ^ In a particular embodiment, the UE counts the number of times a PDCCH order has been received in order to initiate a random access procedure toward an LTM candidate cell to initiate an early UL sync (calso called TA acquisition procedure) plus the number of times a lower layer signalling has been received from the network in order to pre-activate a TCI state on an LTM candidate cell. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ SSB selection: In another particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs configured for early TCI state activation and for early TCI state activation. In a sub-option, the UE further selects the SSBs indicated in the lower layer signaling (e.g., Candidate Cell TCI Activation / Deactivation MAC CE, reproduced below) triggering early TCI state activation and indicated in the PDCCH order for early UL sync. ^ SSB selection: In another particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs configured for early TCI state activation and for early TCI state activation based on a ranking. The SSBs on top of the rank (rank 1) would be the SSBs in which both has been configured and triggered. The SSBs below that rank (rank 2) are the SSBs for which both were configured, and only early UL sync is triggered. The SSBs below that rank (rank 3) are the SSBs for which both were configured, and only early TCI state activation is triggered. The SSBs below that rank (rank 4) are the SSBs for which both were configured, but had no triggering of early TCI state activation and no triggering of early UL sync. Based on the rank, the UE selects the SSBs to include in the LTM CSI measurement report, starting by including SSBs in rank 1 (if any), followed by rank 2 (if any), followed by rank 3 (if any), followed by rank 4 (if any). ^ Testability / detectability: See testability for rules 5 and 6. ‐ 8) In a particular embodiment, the UE selects an LTM candidate cell based on L3 measurements (e.g., cell-based RSRP). ^ In this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on one or more measurement(s) of the LTM candidate cell(s) and / or the SSB(s) configured as LTM CSI resource(s). ^ In a particular embodiment, the UE select an LTM candidate cell based on performed L3 measurements. The UE ranks the LTM candidate cells based on their cell measurements, and the ones on top have higher priority to be included in the LTM CSI measurement report. In the example below, with RSRPn > RSRPn+1, this would be the rank: ^ Cell-based RSRP X, LTM candidate cell ID 1 ^ Cell-based RSRP X2, LTM candidate cell ID 4 ^ Cell-based RSRP X3, LTM candidate cell ID 7 ^ Cell-based RSRP X4, LTM candidate cell ID 6 ^ Cell-based RSRP X5, LTM candidate cell ID 2 ^ Cell-based RSRP X6, LTM candidate cell ID 3 ^ Cell-based RSRP X7, LTM candidate cell ID 5 ^ Cell-based RSRP X8, LTM candidate cell ID 8 ^ The UE includes in the LTM CSI measurement report the LTM candidate cells whose IDs are 1, 4, 7 and 6, since these are the ones with the 4 highest cell measurement(s). ^ The so-called L3 measurements may corresponds to cell-based RSRP, cell-based RSRQ or cell-based SINR (as defined in 3GPP TS 38.331), wherein cell quality is derived based on one or more SSB measurements of a cell such as, for example, by averaging multiple SSB measurements and / or considering the SSB measurements with the highest RSRP as the cell based measurements. ^ In a further particular embodiment, these are filtered according to a quantity configuration such as, for example, time domain filter parameter or information enabling the UE to derive a filter parameter. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). In one sub- option these are L3 filtered measurements per SSB (similar to the ones which would be included in a L3 measurement report). ^ The benefit is that the UE prioritize an LTM candidate cell with good radio conditions which speeds up the access, saves power, increases the chances for the random access procedure to not fail (in case an LTM cell switch is triggered). ^ Another benefit is that despite the UE reporting lower layer measurements (e.g., L1-RSRP) on LTM candidate cell(s) to the network, for LTM cell switch decisions, the further selection is performed based on L3 measurements, which are meant to be more stable (when L3 filtering is applied), so that the risks of ping-pong cell switches are reduced, which performance (since ping-pongs tend to lead to failures or further interruption). ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated LTM CSI measurement report (e.g., periodically or aperiodic), so we can evaluate the content of the report. The power of each LTM candidate cell in the lab setup can be adjusted (which should define the RSRP), so we are aware in the test which LTM candidate cells should have strongest radio conditions / RSRP, and, also having the content of the report, it may be determined whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s). ^ To verify that the selected is based on cell measurements, we may also configure the UE to report L3 measurement reports (e.g., periodic), so the UE’s performed cell quality is reported for the LTM candidate cell(s) to be observed right before and / or after the LTM CSI measurement report is received. ‐ 9) In a particular embodiment, the UE selects an LTM candidate cell based on whether there is a configured grant available. ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The availability of an UL configured grant is one example of the configuration associated to an LTM execution (LTM cell switch), since that is used for the UE to transmit UL information to the target cell after the reception of the LTM cell switch command (MAC CE). ^ In a particular embodiment, the UE selects an LTM candidate cell in which the corresponding RRC configuration includes a configured grant to be used for the first transmission when an LTM cell switch is triggered. The configured grant in this case is a pre-allocated set of resources that the UE can use when executing an LTM cell switch. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs associated to UL configured grants. ^ One benefit is that the UE selects LTM candidate cells for which the LTM cell switch, when triggered, would have lower interruption time, since the availability of the UL grant prevents the UE to have to send a scheduling request (SR) in the target cell after the LTM cell switch, since it already has the UL grant available. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, out of the L1 LTM candidate cells, only L cells contain configured UL grant(s) available. Then, the lab network can trigger the UE to transmit the associated LTM CSI measurement report (e.g., periodically or aperiodic), so we can evaluate the content of the report and observe whether the included cells are the ones with the available UL grant configured. ‐ 10) In a particular embodiment, the UE selects an LTM candidate cell based on whether there is a contention free random access (CFRA) configuration available. ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The availability of a CFRA configuration is one example of the configuration associated to an LTM execution (LTM cell switch), since that is used to access the target cell after the reception of the LTM cell switch command (MAC CE). ^ In a particular embodiment, the UE selects an LTM candidate cell in which the corresponding RRC configuration includes a contention free random access configuration. This contention free random access configuration can be identified by the RACH-ConfigDedicated IE present within the ReconfigurationWithSync IE or any other configuration with indicate to the UE to use a particular RACH preamble index, a beam, one or more RACH occasions and any other parameters / fields so that when RACH procedure is performed by the UE there are no conflicts with other UEs. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs associated to preamble and / or time / frequency resources for CFRA. ^ One benefit is that the UE selects LTM candidate cells for which the LTM cell switch, when triggered, would have lower interruption time when Random access is needed, since CFRA is faster than contention based random access. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, out of the L1 LTM candidate cells, only L cells are configured with CFRA. Then, the lab network can trigger the UE to transmit the associated LTM CSI measurement report (e.g., periodically or aperiodic), so we can evaluate the content of the report and observe whether the included cells are the ones configured with CFRA. ‐ 11) In a particular embodiment, the UE selects an LTM candidate cell based on how often that cell is selected by the network as a target in LTM cell switch. ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The LTM candidate cell configuration is one example of the configuration associated to an LTM execution (LTM cell switch), since that is applied after the reception of the LTM cell switch command (MAC CE). ^ In a particular embodiment, the UE includes in the LTM CSI measurement report the cells with highest number of LTM cell switch execution(s). In one example, the UE may monitor the number of times an LTM cell switch procedure has been executed towards an LTM candidate cell, meaning in this case that the LTM candidate cell is the target cell of the LTM cell switch. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell e.g. the SSBs whose RSRP have the highest values. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs indicated more often in LTM cell switch command(s) such as, for example, SSBs configured as QCL courses for the indicated TCI state ID(s) in the LTM cell switch command. ^ One benefit is that the fact that LTM cell switches are executed towards some cells more often than others, may indicate that these are cells with better coverage and more likely candidates, so the network would typically want to get information about them. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, out of the L1 LTM candidate cells, cell switch is performed for the same candidates for a number of times. After some repetitions, we may reduce the power for these cells, and observe whether they are being included in the LTM CSI measurement reports. ‐ 12) In a particular embodiment, the UE selects an LTM candidate cell based on how often that cell is a source cell in an LTM cell switch. ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The serving cell configuration is one example of the configuration associated to an LTM execution (LTM cell switch), since that includes the LTM CSI measurement configuration(s) (e.g., LTM CSI reporting configuration(s)). ^ In a particular embodiment, the UE includes in the LTM CSI measurement report the cells with highest number of LTM cell switch execution(s) in which that had been the source cell. In one example, the UE may keep track on the number of times an LTM cell switch procedure has been executed from that LTM candidate cell, meaning in this case that the LTM candidate cell is the source cell of the LTM cell switch. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ One benefit is that the fact that LTM cell switches are executed towards some cells more often than others, may indicate that these are cells with better coverage and more likely candidates, so the network would typically want to get information about them. ^ Testability / detectability: see test for rule 11. ‐ 13) In a particular embodiment, the UE selects an LTM candidate cell for which an LTM cell switch was recently performed ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The LTM candidate cell configuration is one example of the configuration associated to an LTM execution (LTM cell switch), since that is applied after the reception of the LTM cell switch command (MAC CE). ^ In a particular embodiment, the UE includes in the LTM CSI measurement report the latest K cells for which LTM cell switch has been performed to, among the cells configured in the associated LTM CSI resource configuration. For example, when the first LTM cell switch is performed from cell A to the LTM candidate cell ID 1, the UE perform measurements and, in its LTM CSI measurement reports, the UE includes the cell A. When UE triggers another LTM cell switch (e.g., to LTM candidate cell ID 3), it includes in the LTM CSI measurement report the LTM candidate cell ID 1 and cell A. In one option, the UE monitors the number of times an LTM cell switch procedure has been executed towards plus from an LTM candidate cell, meaning in this case that the LTM candidate cell has been either the target cell or the source cell of an LTM cell switch. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs which were recently indicated in LTM cell switch commands. ^ One benefit is that the fact that LTM cell switches may be triggered back to cells the UE comes from, so that including latest visited cells means that the network would often want to know the situation on these cells, so it makes sense to include them. ^ Testability / detectability: see test for rule 11. ‐ 14) In a particular embodiment, the selects an LTM candidate cell according to whether L2 reset is needed or not. ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The field ltm-NoResetID-r18 within an LTM candidate cell configuration is one example of the configuration associated to an LTM execution (LTM cell switch), since that is applied after the reception of the LTM cell switch command (MAC CE). ^ In a particular embodiment, the UE selects an LTM candidate cell whether a L2 reset is needed or not in case an LTM cell switch is triggered towards a given LTM candidate cell. How the UE understand whether the L2 reset is needed or not before an LTM cell switch is triggered can be, for example, by the presence of the field ltm-NoResetID-r18 within an LTM candidate cell configuration. If the field ltm- NoResetID-r18 has the same value of that one the UE has for the current serving cell, this means that no L2 reset is needed. Otherwise, the UE needs to perform L2 reset if an LTM cell switch is triggered toward that LTM candidate cell. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include in the LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ One benefit is that the UE selects LTM candidate cells for which the LTM cell switch, when triggered, would have lower interruption time when a L2 reset is not to be performed I an LTM cell switch. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, out of the L1 LTM candidate cells, only L cells are configured for no L2 reset. Then, the lab network can trigger the UE to transmit associated LTM CSI measurement report (e.g., periodically or aperiodic), so we can evaluate the content of the report and observe whether the included cells are the ones configured with no L2 reset. ‐ 15) In a particular embodiment, the UE selects an LTM candidate based on the order of appearance in the measurement configuration received by the network ^ In this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on d) an indication of relevance of an LTM candidate cell for the network. In other words, the order in which LTM candidate cells appear in the measurement configuration indicates some kind of importance to the UE about the LTM candidate cell to the network. ^ In a particular embodiment, the UE selects an LTM candidate cell according to the order in which an LTM candidate cell appears in the list of LTM candidate cell to be measured by the UE. In such a case, the UE receives a list of LTM-CSI- ResourceConfig IEs and in each LTM-CSI-ResourceConfig IE there is a list of LTM candidate cells. The UE will selects the first LTM candidate cell that appear in the list. For example: o LTM-CSI-ResourceConfig IE ID 1 ^ LTM candidate cell ID 1 ^ LTM candidate cell ID 3 ^ LTM candidate cell ID 5 o LTM-CSI-ResourceConfig IE ID 2 ^ LTM candidate cell ID 3 ^ LTM candidate cell ID 6 ^ LTM candidate cell ID 7 o LTM-CSI-ResourceConfig IE ID 3 ^ LTM candidate cell ID 3 ^ LTM candidate cell ID 8 ^ LTM candidate cell ID 1 ^ LTM candidate cell ID 2 ^ LTM candidate cell ID 5 ^ cell ID 4 ^ LTM candidate cell ID 6 ^ In this example, the order of LTM candidate cell that UE follow for the selection it the following: ^ LTM candidate cell ID 1 ^ LTM candidate cell ID 3 ^ LTM candidate cell ID 5 ^ LTM candidate cell ID 6 ^ LTM candidate cell ID 7 ^ LTM candidate cell ID 8 ^ LTM candidate cell ID 2 ^ LTM candidate cell ID 4 ^ SSB selection: In one option, when the UE selects which LTM candidate cells to include int he LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include int he LTM CSI measurement report, the UE selects the SSBs also in order of appearance, as indicated above for the LTM candidate cells. ^ One benefit of this rule for selecting LTM candidate cells to include in the LTM CSI measurement report is that the UE reports what the UE understands as more important to the network, which means that the network is more aware of LTM candidate cells which are considered more important, compared to others. ^ Testability / detectability: see test for rule 4. ‐ 16) In a particular embodiment, the UE selects an LTM candidate based on the number of SSBs to measure for each LTM candidate cell. ^ In this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on d) an indication of relevance of an LTM candidate cell for the network. In other words, the number of SSBs appear in the measurement configuration for a given LTM candidate cell indicates some kind of importance to the UE about the LTM candidate cell to the network, since network wants more information about that cell compared to others. ^ In a particular embodiment, the UE selects an LTM candidate cell based on the number of SSBs configured as LTM CSI resources for a LTM candidate cell. This means the UE counts the SSBs to measure for a LTM candidate cell in each LTM- CSI-ResourceConfig IE received and includes the LTM candidate cells with the highest number of configured SSBs. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include int he LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell e.g. the SSBs whose RSRP have the highest values. ^ One benefit of this rule for selecting LTM candidate cells to include in the LTM CSI measurement report is that the UE reports what the UE understands as more important to the network, which means that the network is more aware of LTM candidate cells which are considered more important, compared to others. ^ Testability / detectability: see test for rule 4. ‐ 17) In a particular embodiment, the UE selects an LTM candidate based on the order of appearance of an SSB in the measurement configuration received by the network. ^ In this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on d) an indication of relevance of an LTM candidate cell for the network. In other words, the order in which SSBs appear in the measurement configuration indicates some kind of importance to the UE about the LTM candidate cell to the network. ^ In a particular embodiment, the UE selects SSBs according to the order in which they appear in the list of LTM candidate cell to be measured by the UE. In such a case, the UE receives a list of LTM-CSI-ResourceConfig IEs and in each LTM- CSI-ResourceConfig IE there is a list of SSBs. ^ One benefit of this rule for selecting SSBs to include in the LTM CSI measurement report is that the UE reports what the UE understands as more important to the network in terms of SSBs for to be included, which means that the network is more aware of SSBs which are considered more important, compared to others. ^ Testability / detectability: see test for rule 4. ‐ 18) In a particular embodiment, the UE selects an LTM candidate based on random selection o In a particular embodiment, the UE prioritize a cell based on a random number. For example, the UE draws a random number X uniformly distributed between 0..1. If X is above a certain threshold, e.g. 0.5, the UE prioritizes a serving cell and otherwise it prioritizes a non-serving cell. In this approach, all cells may be treated equally. o Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. In this case, the expectation is that different L LTM candidate cells will be reported without really a pattern. Further, after some repetitions, we may reduce the power for these cells and we can further observe that at every iteration different LTM candidate cells are reported. ‐ 19) In a particular embodiment, the UE selects an LTM candidate based on round-robin selection ^ In a particular embodiment, the UE prioritize a cell based on round-robin. For example, every second time the UE prioritizes an LTM candidate cell and every other second time another LTM candidate cell (e.g., different from the previous LTM candidate cell). In another example, the UE prioritizes based on a strict order, among the configured LTM candidate cell to measure to make sure all cells are treated equally in the long term. ^ One benefit of this rule is that all the LTM candidate cells are reported in an equal manner in the reports. Thus, the network will have a wide knowledge of what is the current conditions of all the configured LTM candidate cells, even if this may take a larger number of L1 reports to be acquired by the network. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L1 LTM candidate cells. In this case, after a considerable number of repetitions it can be observed that the number of appearances of each LTM candidate cells in the reports is the same (or very close) for all the LTM candidate cells. ‐ 20) In a particular embodiment, the UE selects an LTM candidate on access barring or access control ^ In a particular embodiment, the UE prioritize a cell based on access barring or access control, such as for unified access control (UAC), the access category, access identity, barring factor associated with the access attempt for which the random access belongs. The benefit is that access attempts which are not barred or already have undergone access barring check are allowed and also attempts that have higher probability to pass access barring check is prioritized over those with lower probability. ^ One benefit of this rule is that UE will include in the report only LTM candidate cell for which the RRC connection establishment is not barred. This will avoid the UE to be rejected in case of an LTM cell switch with a consequent increase in the connectivity and data interruption ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells where the each LTM candidate cell is either barred on not barred (e.g., one bit it toggle to 1 or 0). In this case, after observing which LTM candidate cells are reported by the UE, in further repetitions the barring conditions are changed (is one LTM candidate cell was barred before now is not barred), and it can be observed is those LTM candidate cells are not included or not in the report. ‐ 21) In a particular embodiment, the UE selects an LTM candidate cell based on the lowest pathloss calculated for an SSB. ^ In this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on one or more measurement(s) of the LTM candidate cell(s) and / or the SSB(s) configured as LTM CSI resource(s). ^ In a particular embodiment, the UE measure the RSRP, and calculates the pathloss for the SSBs for each configured LTM candidate cell and then it orders the LTM candidate cells based on the pathloss measured for each candidate cell. The cell with the lowest pathloss comes first in the ordered list. Once ordered, the UE select the LTM candidate cells and the SSB to include in the report based on the parameter L (number of LTM candidate cells to be included). The SSBs may be selected in a similar manner. ^ It may be advantageous to base the selection on pathloss, rather than RSRP, since a link with low pathloss is good both for downlink and uplink transmissions, whereas a link with high RSRP is not necessarily good for uplink transmission: a high RSRP may be the result of a high transmit power ^ Testability / detectability: A similar test as for rule 1 can be used. In the lab setup, when the transmit power of each candidate cell is adjusted, also the ‘ss-PBCH- BlockPower’ provided to the UE within the configuration of an LTM candidate cell (e.g. IE LTM-SSB-Config) is adjusted to reflect the changed transmit power. If the selection in the UE is based on pathloss, the UE should select the same candidate cells, irrespective of the candidate cell transmit power. If the transmit power of each candidate cell is adjusted, and that change is not reflected ‘ss-PBCH-BlockPower’ configuration, the selection of cells would be impacted ^ An alternative test is to configure an additional LTM CSI measurement report, triggered shortly before and / or after in time compared to the previous LTM CSI measurement report, but this time with an associated LTM CSI reporting configuration with L = L1. In that case, the lab network has the content of both reports, and can determine whether the second report is filled in according to the rule(s), where the rules can be reverse engineered based on the content of the second report (which would include measurements of all configured LTM candidate cells). For each reported RSRP, the corresponding pathloss will be calculated, based on the ‘ss-PBCH-BlockPower’ provided to the UE within the configuration of an LTM candidate cell (e.g. IE LTM-SSB-Config). ‐ 22) In a particular embodiment, the UE selects an LTM candidate cell based on the order of appearance according to the list of SSBs ordered according to the lowest pathloss calculated. ^ In this rule, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) based on one or more measurement(s) of the LTM candidate cell(s) and / or the SSB(s) configured as LTM CSI resource(s). ^ In a particular embodiment, the UE measures first all the SSBs configured to be measured, and calculates the pathloss for each SSB measured, regardless to which LTM candidate cell they belong. Once all the SSBs have been ordered based on the lowest pathloss, the UE selects the LTM candidate cell based on the order of appearance in the list. For example: ^ SSB1, pathloss X, LTM candidate cell ID 1 ^ SSB6, pathloss X2, LTM candidate cell ID 1 ^ SSB3, pathloss X3, LTM candidate cell ID 4 ^ SSB5, pathloss X4, LTM candidate cell ID 2 ^ SSB4, pathloss X5, LTM candidate cell ID 2 ^ SSB2, pathloss X6, LTM candidate cell ID 1 ^ SSB4, pathloss X7, LTM candidate cell ID 3 ^ SSB1, pathloss X8, LTM candidate cell ID 3 ^ In this particular case, the UE may select the LTM candidate cells in the order of ID1 first (with SSB1, SSB6, SSB2), ID4 second (with SSB3), ID2 third (with SSB5, SSB4), and ID3 forth (with SSB4, SSB1). ^ It may be advantageous to base the selection on pathloss, rather than RSRP, since a link with low pathloss is good both for downlink and uplink transmissions, whereas a link with high RSRP is not necessarily good for uplink transmission. ^ Testability / detectability: see test for rule 21. ‐ 23) In a particular embodiment, the UE selects an LTM candidate cell based on the average pathloss calculated for all the SSBs that belong to an LTM candidate cell. ^ In one embodiment, the UE calculates the average pathloss for all the SSBs belonging to a given LTM candidate cell and then it orders all the LTM candidate cells to be measured based on the average pathloss. For example: ^ Average pathloss X, LTM candidate cell ID 1 ^ Average pathloss X2, LTM candidate cell ID 4 ^ Average pathloss X3, LTM candidate cell ID 7 ^ Average pathloss X4, LTM candidate cell ID 6 ^ Average pathloss X5, LTM candidate cell ID 2 ^ Average pathloss X6, LTM candidate cell ID 3 ^ Average pathloss X7, LTM candidate cell ID 5 ^ Average pathloss X8, LTM candidate cell ID 8 ^ It may be advantageous to base the selection on pathloss, rather than RSRP, since a link with low pathloss is good both for downlink and uplink transmissions, whereas a link with high RSRP is not necessarily good for uplink transmission. ^ Testability / detectability: see test for rule 21. ‐ 24) In a particular embodiment, the UE selects an LTM candidate cell based according to the average pathloss for the SSBs with a pathloss value below a certain threshold that belong to an LTM candidate cell. ^ In a particular embodiment, calculates the average pathloss for the SSBs with a pathloss value below a certain threshold belonging to a given LTM candidate cell and then it orders all the LTM candidate cells to be measured based on the average pathloss. For example: ^ Average pathloss X, LTM candidate cell ID 1 ^ Average pathloss X2, LTM candidate cell ID 4 ^ Average pathloss X3, LTM candidate cell ID 7 ^ Average pathloss X4, LTM candidate cell ID 6 ^ Average pathloss X5, LTM candidate cell ID 2 ^ Average pathloss X6, LTM candidate cell ID 3 ^ Average pathloss X7, LTM candidate cell ID 5 ^ Average pathloss X8, LTM candidate cell ID 8 ^ Where the average pathloss is calculated only using the SSBs where the pathloss is below a certain threshold. ^ It may be advantageous to base the selection on pathloss, rather than RSRP, since a link with low pathloss is good both for downlink and uplink transmissions, whereas a link with high RSRP is not necessarily good for uplink transmission. ^ Testability / detectability: see test for rule 21. ‐ 25) In a particular embodiment, the UE selects the SpCell (as one of the LTM candidate cells) to be included in the LTM candidate report, even when the indication to include the SpCell is not set in the reporting configuration ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. ^ In a particular embodiment, the UE includes the SpCell (and one or more associated SSBs) even when it is indicated not to include the SpCell measurements, but when the SpCell is configured as an LTM candidate cell. ^ When the UE is configured an LTM CSI reporting configuration (e.g., IE LTM-CSI-ReportConfig, and the UE is NOT enabled to include SpCell measurements, [SpCellInclusion not set to ‘enabled’], when the SpCell is configured as an LTM candidate cell in the LTM CSI resource configuration, the UE includes in the LTM CSI report associated to that LTM CSI resource configuration one or more SSBRI(s) for the current SpCell. ^ One benefit is that the UE would treat the SpCell as any other LTM candidate cell, and include that in the LTM CSI measurement report, even when that is not explicitly request. ^ In a particular embodiment that is used in combination with other rules, for example, the SpCell is treated as any other LTM candidate cell configured in the LTM CSI resource configuration, so that when the SpCell fulfills the criteria of the rules it is included as any other LTM candidate cell. ^ Testability / detectability: see test for rule 1. ‐ 26) In a particular embodiment the UE selects the LTM candidate cells with shortest SSB periodicities ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The SSB periodicity within an LTM candidate cell configuration is one example of the configuration associated to an LTM execution (LTM cell switch). In more general words, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more time domain properties of the SSBs transmitted by an LTM candidate cell. ^ In a particular embodiment the UE includes in the LTM CSI measurement report the LTM candidate cells with shortest SSB periodicity. In one sub-option, when cells have the same periodicities, the UE includes the LTM candidate cell(s) based on one of the other rules. ^ One benefit is that the UE include cells which are easier to measure, which would allow the UE to measure more cells. These would also be cells which are faster to access in case of LTM cell switch. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. For L candidates or fewer the lab setup may adjust the SSB periodicity, to make them shorter than the other LTM candidate cells, so we are aware in the test which LTM candidate cells have shortest SSB periodicity. Having the content of the report, it may be determined whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s). ‐ 27) In a particular embodiment, the UE selects the LTM candidate cells with smallest number of SSBs to measure ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an SSB. The number of SSBs of an LTM candidate cell configuration is one example of the configuration associated to an LTM execution (LTM cell switch). In this case, the number of SSBs may be interpreted as the number of SSBs for an LTM candidate cell in a particular LTM CSI resource configuration; or the number of SSBs overall for that LTM candidate cell (e.g. SSB-ToMeasure IE or SSB position in burst configuration). ^ In a particular embodiment, the UE includes in the LTM CSI measurement report the LTM candidate cells with lowest number of SSBs. In one sub-option, when cells have the same number, UE includes the LTM candidate cell(s) based on one of the other rules. ^ One benefit is that the UE would include cells which are easier to measure, since there would be fewer SSBs to measure, so the UE would be able to measure more cells. These would also be cells which are faster to access in case of LTM cell switch. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. For L candidates or fewer the lab setup may the number of SSBs, with fewer SSBs compared to the other LTM candidate cells, so we are aware in the test which LTM candidate cells have fewer SSBs. Having the content of the report, it may be determined whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s). ‐ 28) In a particular embodiment, the UE selects the LTM candidate cells in the same frequency and / or subcarrier spacing as the SpCell ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on a frequency and / or subcarrier spacing of an LTM candidate cell. ^ In a particular embodiment, the UE includes in the LTM CSI measurement report the LTM candidate cells in the same frequency (e.g., SSB frequency and / or point A frequency, CSI-RS frequency, etc.) and / or subcarrier spacing as the SpCell. ^ SSB selection: In a particular embodiment, when the UE selects which LTM candidate cells to include int he LTM CSI measurement report, the UE selects the SSBs with the highest measurement quantity to be included associated to the selected cell (e.g., the SSBs whose RSRP have the highest values). ^ One benefit of the rule is that frequency neighbors are prioritized among the LTM candidate cells, since for coverage-based LTM cell switches these are cells the network would be more interested to move the UE to. ^ Testability / detectability: This rule can be tested by setting up a lab network and configuring the UE with a number L1 of detectable LTM candidate cells, and further configuring the UE with LTM CSI resource configuration including these detectable cells, and further configuring the UE with an LTM CSI reporting configuration for reporting L < L1 LTM candidate cells. Then, the lab network can trigger the UE to transmit the associated report (e.g., periodically or aperiodic), so we can evaluate the content of the report. For L candidates the lab setup configures the same SSB frequency and / or subcarrier spacing as the SpCell, while these are different for the other LTM candidate cells, so we are aware in the test which LTM candidate cells have fewer SSBs. Having the content of the report, it may be determined whether the selection at the UE of the subset of LTM candidate cells is performed according to the rule(s). ‐ 29) In a particular embodiment, the UE selects the LTM candidate cells in at least one different frequency and / or subcarrier spacing as the frequency of the SpCell ^ In this case, the UE includes the LTM candidate cell(s) and / or the SSB(s) of the LTM candidate cells (or the LTM CSI resource(s)) to be included in the LTM CSI measurement report based on a frequency and / or subcarrier spacing of an LTM candidate cell. ^ In a particular embodiment, the UE includes an LTM candidate cell for at least one different frequency among the frequencies of the LTM candidate cells. For example, when the LTM CSI resource configuration indicates cells in frequency F0, F1, F2, the UE includes at least one LTM candidate cell in F0, at least one LTM candidate cell in F1, and at least one LTM candidate cell in F2. ^ One benefit is that the network would be aware of the LTM candidate cells in different frequencies, which may be very useful for load balancing purposes. ^ In a particular embodiment, the UE includes the LTM candidate cell with highest measurement quantity (e.g., RSRP, L1-RSRP, differential RSRP) for at least one different frequency among frequencies of the LTM candidate cells. For example, when the LTM CSI resource configuration indicates cells in frequency F0, F1, F2, the UE includes the LTM candidate cell in F0 with highest RSRP, the LTM candidate cell in F1 with highest RSRP, and the LTM candidate cell in F2 with highest RSRP. ^ One benefit is that the network would be aware of the LTM candidate cells with highest measurement quantity in different frequencies, which may be very useful for load balancing purposes. ^ In a particular embodiment, the UE includes the LTM candidate cells in the same frequency as the serving cell(s). For example, when the UE is configured with serving cells in serving frequencies F0, F1, F2, and the LTM CSI reporting configuration includes LTM candidate cells in F0, F1, F2, the UE includes the LTM candidate cell(s) in in F0, F1, F2. ^ One benefit is that the network would be aware of the LTM candidate cells with highest measurement quantity in the serving frequencies, in case it prefers to trigger an intra-frequency LTM cell switch, either to the same SpCell frequency or to another serving frequency. ^ In a particular embodiment, the UE includes the LTM candidate cells with highest measurement quantity in the same frequency as the serving cell(s) i.e. the best neighbors in the serving frequencies. For example, when the UE is configured with serving cells in serving frequencies F0, F1, F2, and the LTM CSI reporting configuration includes LTM candidate cells in F0, F1, F2, the UE includes the LTM candidate cell(s) with the highest measurement quantity (e.g., L1-RSRP, RSRP, differential RSRP, RSRQ, SINR, etc.) in F0, F1, F2. According to certain embodiments, when the UE uses a criterion for selecting LTM candidate cells for including in the LTM CSI measurement report, and as an outcome more cells fulfill the criteria than the number of cells which can be included in the report, the UE uses one of the other criterion for further select cells. For example, when the UE selects cells according to rule 4) i.e. with most appearances in the LTM CSI resource configuration, and multiple cells have the same amount of appearances, the UE may use the rule 1) for further selecting the ones with highest RSRP (among its SSBs). In a particular embodiment, the UE LTM candidate cells to be included in the LTM CSI measurement report based on a first rule (e.g. as shown above), and the UE selects SSB(s) of a given LTM candidate cell which has been selected based on a second rule (which may be the same or different than the first rule). For example, the UE may select the LTM candidate cells based on the radio conditions (e.g., according to rule 1) but select SSBs of the selected LTM candidate cells based on the SSBs being triggered for early TCI state activation. For rules 21, 22, 23, 24 described above, the UE includes LTM candidate cells in LTM CSI measurement reports based on pathloss, in certain particular embodiments. That may be based on parameters within the configuration of an LTM candidate cell (e.g., IE LTM-SSB-Config), such as the ‘ss-PBCH-BlockPower’ which indicates the average EPRE of the resources elements that carry secondary synchronization signals in dBm that the network uses for SSB transmission on the LTM candidate cell. – LTM-CandidateToAddModList The IE LTM-CandidateToAddModList concerns a list of LTM candidate configurations to add or modify. -- ASN1START -- TAG-LTM-CANDIDATETOADDMODLIST-START LTM-CandidateToAddModList-r18 ::= SEQUENCE (SIZE (1..maxNrofCellsLTM-r18)) OF LTM-Candidate-r18 LTM-Candidate-r18 ::= SEQUENCE { ltm-CandidateId-r18 LTM-CandidateId-r18, ltm-CandidatePCI-r18 PhysCellId, ltm-SSB-Config-r18, LTM-SSB-Config-r18 OPTIONAL, -- Need M ltm-CandidateConfig-r18 OCTET STRING (CONTAINING RRCReconfiguration), OPTIONAL, -- Need M […] } Editor’s Note: FFS whether ltm-EarlyUL-SyncConfig-r18 is a single configuration or a list of EarlyUL-SyncConfig-r18. LTM-SSB-Config-r18 ::= SEQUENCE { ssbFrequency-r18 ARFCN-ValueNR, subCarrierSpacing-r18 SubCarrierSpacing, ssb-Periodicity-r18 ENUMERATED {ms5, ms10, ms20, ms40, ms80, ms160, spare2, -- […] LTM-SSB-Config field descriptions […] ss-PBCH-BlockPower Indicates the average EPRE of the resources elements that carry secondary synchronization signals in dBm that the network uses for SSB transmission on the LTM candidate cell. […] Based on the measured RSRP of an SSB and the signaled transmit power of the SSB (ss- PBCH-BlockPower), the UE can calculate the pathloss of the corresponding SSB, in a particular embodiment. The pathloss describes how much of the signal power is lost during the transmission from the transmitter to the receiver: It is advantageous to communicate over a link with low pathloss, since a larger fraction of the transmitted signal reaches the receiver. FIGURE 2 illustrates a method 200 by a UE for LTM CSI measurement reporting, according to certain embodiments. In a particular embodiment, UE may include, for example, a UE 412A as illustrated in FIGURE 4, which is described in more detail below. UE 412A may communicate with a network node such as, for example, network node 410A, which is also illustrated and described with regard to FIGURE 4. As illustrated, the method begins at step 202 when the UE 412A receives, from a network node 410A, at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of RSs for each LTM candidate cell. Based at least on the at least one LTM CSI reporting configuration, the UE 412A transmits a first LTM CSI measurement report to the network node 410A, at step 204. The first LTM CSI measurement report includes measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs. The subset of the LTM candidate cells and / or the subset of the RSs of the LTM candidate cells is included in the first LTM CSI measurement report based on at least one of: a) one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; b) one or more configurations with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; c) a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; d) an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and e) a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells. In a particular embodiment, the UE 412A selects the subset of the set of the one or more LTM candidate cells and / or the subset of the set of the RSs to be included in the first LTM CSI measurement report. In a further particular embodiment, when selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of the RSs, the UE 412A first selects at least one LTM candidate cell to be included in the first LTM CSI measurement report and then, for each LTM candidate cell, selects at least one RS to be included in the first LTM CSI measurement report. Alternatively, the UE 412A first selects at least one RS to be included in the first LTM CSI measurement report and then selects at least one LTM candidate cell to be included based on the selected RSs. As still another alternative, the UE 412A selects one or more LTM candidate cells and one or mode RSs independently. In a further particular embodiment, when selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs, the UE 412A selects the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs based on one or more rules and / or criteria. In a further particular embodiment, when selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs based on the one or more rules and / or criteria, the UE 142A: selects an LTM candidate cell having a highest RSRP measured on an RS; selects an LTM candidate cell based on an order of appearance according to a list of RSs ordered with a highest RSRP measured first; selects an LTM candidate cell based on an average RSRP measured on detected RSs of an LTM candidate cell; selects an LTM candidate cell based on Layer 3, L3, measurements; or selects an LTM cell having a lowest pathloss calculated for an RS. In a further particular embodiment, when selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs based on the one or more rules and / or criteria, the UE 412A: selects an LTM candidate cell based on an order of appearance according to a list of RSs that are ordered based on the lowest pathloss calculated; selects an LTM candidate cell based on an average pathloss calculated for all the RSs that belong to the LTM candidate cell; or selects an LTM candidate cell having an average pathloss for the RSs below a certain threshold that belong to an LTM candidate cell. In a particular embodiment, each LTM CSI resource configuration comprises an indication of an RS and an indication of an LTM candidate cell. In a further particular embodiment, the indication of the RS comprises an Synchronization Signal Block, SSB, index and / or a position in a list in which an SSB index is included. In a particular embodiment, the at least one LTM CSI resource configuration is associated to the at least one LTM CSI Reporting configuration. In a particular embodiment, the at least one LTM CSI reporting configuration indicates the set of LTM candidate cells by indicating a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report. Additionally or alternatively, the at least one LTM CSI reporting configuration indicates the set of RSs by indicating a number “M” of RSs for each LTM candidate cell to be included in the first LTM CSI measurement report. In a particular embodiment, the UE 412A performs at least one of: determining not to include, in the first LTM CSI measurement report, measurement information associated with at least one LTM candidate cell that is in the set of LTM candidate cells but not in the subset of LTM candidate cells; and / or determining not to include, in the first LTM CSI measurement report, measurement information associated with at least one RS that is in the set of RSs but not in the subset of RSs. In a further particular embodiment, a number of configured LTM candidate cells in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration is higher than a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration. Additionally or alternatively, a number of LTM CSI resources in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration, is higher than the number of “L” LTM candidate cells to be included in the first LTM CSI measurement report multiplied by a number of “M” RSs per LTM candidate cell to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration. In a further particular embodiment, the first LTM CSI measurement report includes a resource indicator associated to an LTM CSI resource and / or to an LTM candidate cell and / or to a RS. The resource indicator comprises a position in a list of a plurality of RS identifiers in the at least one LTM CSI resource configuration associated to an identifier of a particular RS that is included in the first LTM CSI measurement report. Additionally or alternatively, the resource indicator comprises a position in a list of a plurality of LTM candidate cells in the at least one CSI resource configuration associated to an identifier of a particular LTM candidate cell that is being included in the first LTM CSI measurement report. In a particular embodiment, the first LTM CSI measurement report includes measurement information associated to an LTM CSI resource. In a further particular embodiment, for the at least one LTM candidate cell configuration, a number of RSs configured as LTM CSI resources is higher than a number of “M” RSs indicated in the at least one LTM CSI Reporting configuration that triggers the first LTM CSI measurement report. In a particular embodiment, after transmitting the first LTM CSI measurement report, the UE 412A transmits a second LTM CSI measurement report triggered by a same LTM CSI reporting configuration that triggered the first LTM CSI measurement report. The second LTM CSI measurement report includes measurement information for at least one LTM candidate cell and / or at least one RS that is different from the measurement information transmitted in the first LTM CSI measurement report. In a further particular embodiment, the second LTM CSI measurement report is triggered based on a CSI reporting configuration indicating a transmission of periodic measurement reports. In a further particular embodiment, the RS includes at least one of: a SSB, an RS transmitted in a beam or spatial direction, a MRS, and CSI-RS. FIGURE 3 illustrates a method 300 by a network node for receiving LTM CSI measurement reporting, according to certain embodiment. In a particular embodiment, the network node may include, for example, a network node 410A as illustrated in FIGURE 4, which is described in more detail below. The 410A may communicate with a UE such as, for example, UE 412A, which is also illustrated and described with regard to FIGURE 4. As depicted, the method begins at step 302 when the network node transmits, to a UE, at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of Reference Signals, RSs, for each LTM candidate cell. Based at least on the at least one LTM CSI reporting configuration, the network node receives a first LTM CSI measurement report from the UE, at step 304. The first LTM CSI measurement report includes measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs. The subset of the set of LTM candidate cells and / or the subset of the set of RSs is included in the first LTM CSI measurement report based on at least one of: a) one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; b) one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; c) a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; d) an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and e) a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells. In a particular embodiment, each LTM CSI resource configuration comprises an indication of an RS and an indication of an LTM candidate cell. In a further particular embodiment, the indication of the RS includes an SSB index and / or a position in a list in which an SSB index is included. In a particular embodiment, the at least one LTM CSI resource configuration is associated to the at least one LTM CSI Reporting configuration. In a particular embodiment, the at least one LTM CSI reporting configuration indicates the set of LTM candidate cells by indicating a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report. Additionally or alternatively, the at least one LTM CSI reporting configuration indicates the set of indicating a number “M” of RSs for each LTM candidate cell to be included in the first LTM CSI measurement report. In a particular embodiment, a number of configured LTM candidate cells in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration is higher than a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration. Additionally or alternatively, a number of LTM CSI resources in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration is higher than the number of “L” LTM candidate cells to be included in the first LTM CSI measurement report multiplied by a number of “M” RSs per LTM candidate cell to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration. In a particular embodiment, the first LTM CSI measurement report includes a resource indicator associated to an LTM CSI resource and / or to an LTM candidate cell and / or to a RS. The resource indicator comprises a position in a list of a plurality of RS identifiers in the at least one LTM CSI resource configuration associated to an identifier of a particular RS that is included in the first LTM CSI measurement report. Additionally or alternatively, the resource indicator comprises a position in a list of a plurality of LTM candidate cells in the at least one LTM CSI resource configuration associated to an identifier of a particular LTM candidate cell that is being included in the first LTM CSI measurement report. In a particular embodiment, the first LTM CSI measurement report comprises measurement information associated to an LTM CSI resource. In a particular embodiment, for the at least one LTM candidate cell configuration, a number of RSs configured as LTM CSI resources is higher than a number of “M” RSs indicated in the at least one LTM CSI Reporting configuration that triggers the LTM CSI measurement report. In a particular embodiment, after receiving the first LTM CSI measurement report, receiving, from the UE, a second LTM CSI measurement report triggered by a same LTM CSI reporting configuration that triggered the first LTM CSI measurement report. The second LTM CSI measurement report comprises measurement information for at least one LTM candidate cell and / or at least one RS that is different from the measurement information transmitted in the first LTM CSI measurement report. In a particular embodiment, the LTM CSI measurement report is triggered based on the CSI reporting configuration indicating a transmission of periodic reports. In a particular embodiment, the RS comprises at least one of: a SSB, an RS transmitted in a beam or spatial direction, a MRS, and a CSI-RS. FIGURE 4 shows an example of a communication system 400 in accordance with some embodiments. In the example, the communication system 400 includes a telecommunication network 402 that includes an access network 404, such as a radio access network (RAN), and a core network 406, which includes one or more core network nodes 408. The access network 404 includes one or more access network nodes, such as network nodes 410a and 410b (one or more of which may be generally referred to as network nodes 410), or any other similar 3rd Generation Partnership Project (3GPP) access node or non-3GPP access point. The network nodes 410 facilitate direct or indirect connection of user equipment (UE), such as by connecting UEs 412a, 412b, 412c, and 412d (one or more of which may be generally referred to as UEs 412) to the core network 406 over one or more wireless connections. Example wireless communications over a wireless connection include transmitting and / or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and / or other types of signals suitable for conveying information without the use of wires, cables, or other material conductors. Moreover, in different embodiments, the communication system 400 may include any number of wired or wireless networks, network nodes, UEs, and / or any other components or systems that may facilitate or participate in the communication of data and / or signals whether via wired or wireless connections. The communication system 400 may include and / or interface with any type of communication, telecommunication, data, cellular, radio network, and / or other similar type of system. The UEs 412 may be any of a wide variety of communication devices, including wireless devices arranged, configured, and / or operable to communicate wirelessly with the network nodes 410 and other communication devices. Similarly, the network nodes 410 are arranged, capable, configured, and / or operable to communicate directly or indirectly with the UEs 412 and / or with other network nodes or equipment in the telecommunication network 402 to enable and / or provide network access, such as wireless network access, and / or to perform other functions, such as administration in the telecommunication network 402. In the depicted example, the core network 406 connects the network nodes 410 to one or more hosts, such as host 416. These connections may be direct or indirect via one or more intermediary networks or devices. In other examples, network nodes may be directly coupled to hosts. The core network 406 includes one more core network nodes (e.g., core network node 408) that are structured with hardware and software components. Features of these components may be substantially similar to those described with respect to the UEs, network nodes, and / or hosts, such that the descriptions thereof are generally applicable to the corresponding components of the core network node 408. Example core network nodes include functions of one or more of a Mobile Switching Center (MSC), Mobility Management Entity (MME), Home Subscriber Server (HSS), Access and Mobility Management Function (AMF), Session Management Function (SMF), Authentication Server Function (AUSF), Subscription Identifier De-concealing function (SIDF), Unified Data Management (UDM), Security Edge Protection Proxy (SEPP), Network Exposure Function (NEF), and / or a User Plane Function (UPF). The host 416 may be under the ownership or control of a service provider other than an operator or provider of the access network 404 and / or the telecommunication network 402, and may be operated by the service provider or on behalf of the service provider. The host 416 may host a variety of applications to provide one or more service. Examples of such applications include live and pre-recorded audio / video content, data collection services such as retrieving and compiling data on various ambient conditions detected by a plurality of UEs, analytics functionality, social media, functions for controlling or otherwise interacting with remote devices, functions for an alarm and surveillance center, or any other such function performed by a server. As a whole, the communication system 400 of FIGURE 4 enables connectivity between the UEs, network nodes, and hosts. In that sense, the communication system may be configured to operate according to predefined rules or procedures, such as specific standards that include, but are not limited to: Global System for Mobile Communications (GSM); Universal Mobile Telecommunications System (UMTS); Long Term Evolution (LTE), and / or other suitable 2G, 3G, 4G, 5G standards, or any applicable future generation standard (e.g., 6G); wireless local area network (WLAN) standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards (WiFi); and / or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave, Near Field Communication (NFC) ZigBee, LiFi, any low-power wide-area network (LPWAN) standards such as LoRa and Sigfox. In some examples, the telecommunication network 402 is a cellular network that implements 3GPP standardized features. Accordingly, the telecommunications network 402 may support network slicing to provide different logical networks to different devices that are connected to the telecommunication network 402. For example, the telecommunications network 402 may provide Ultra Reliable Low Latency Communication (URLLC) services to some UEs, while providing Enhanced Mobile Broadband (eMBB) services to other UEs, and / or Massive Machine Type Communication (mMTC) / Massive IoT services to yet further UEs. In some examples, the UEs 412 are configured to transmit and / or receive information without direct human interaction. For instance, a UE may be designed to transmit information to the access network 404 on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the access network 404. Additionally, a UE may be configured for operating in single- or multi-RAT or multi-standard mode. For example, a UE may operate with any one or combination of Wi-Fi, NR (New Radio) and LTE, i.e. being configured for multi-radio dual connectivity (MR-DC), such as E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) New Radio – Dual Connectivity (EN-DC). In the example, the hub 414 communicates with the access network 404 to facilitate indirect communication between one or more UEs (e.g., UE 412c and / or 412d) and network nodes (e.g., network node 410b). In some examples, the hub 414 may be a controller, router, content source and analytics, or any of the other communication devices described herein regarding UEs. For example, the hub 414 may be a broadband router enabling access to the core network 406 for the UEs. As another example, the hub 414 may be a controller that sends commands or instructions to one or more actuators in the UEs. Commands or instructions may be received from the UEs, network nodes 410, or by executable code, script, process, or other instructions in the hub 414. As another example, the hub 414 may be a data collector that acts as temporary storage for UE data and, in some embodiments, may perform analysis or other processing of the data. As another example, the hub 414 may be a content source. For example, for a UE that is a VR headset, display, loudspeaker or other media delivery device, the hub 414 may retrieve VR assets, video, audio, or other media or data related to sensory information via a network node, which the hub 414 then provides to the UE either directly, after performing local processing, and / or after adding additional local content. In still another example, the hub 414 acts as a proxy server or orchestrator for the UEs, in particular in if one or more of the UEs are low energy IoT devices. The hub 414 may have a constant / persistent or intermittent connection to the network node 410b. The hub 414 may also allow for a different communication scheme and / or schedule between the hub 414 and UEs (e.g., UE 412c and / or 412d), and between the hub 414 and the core network 406. In other examples, the hub 414 is connected to the core network 406 and / or one or more UEs via a wired connection. Moreover, the hub 414 may be configured to connect to an M2M service provider over the access network 404 and / or to another UE over a direct connection. In some scenarios, UEs may establish a wireless connection with the network nodes 410 while still connected via the hub 414 via a wired or wireless connection. In some embodiments, the hub 414 may be a dedicated hub – that is, a hub whose primary function is to route communications to / from the UEs from / to the network node 410b. In other embodiments, the hub 414 may be a non- dedicated hub – that is, a device which is capable of operating to route communications between the UEs and network node 410b, but which is additionally capable of operating as a communication start and / or end point for certain data channels. FIGURE 5 shows a UE 500, which may be an embodiment of the UE 112 of FIGURE 4, in accordance with some embodiments. As used herein, a UE refers to a device capable, configured, arranged and / or operable to communicate wirelessly with network nodes and / or other UEs. Examples of a UE include, but are not limited to, a smart phone, mobile phone, cell phone, voice over IP (VoIP) phone, wireless local loop phone, desktop computer, personal digital assistant (PDA), wireless cameras, gaming console or device, music storage device, playback appliance, wearable terminal device, wireless endpoint, mobile station, tablet, laptop, laptop-embedded equipment (LEE), laptop-mounted equipment (LME), smart device, wireless customer-premise equipment (CPE), vehicle-mounted or vehicle embedded / integrated wireless device, etc. Other examples include any UE identified by the 3rd Generation Partnership Project (3GPP), including a narrow band internet of things (NB-IoT) UE, a machine type communication (MTC) UE, and / or an enhanced MTC (eMTC) UE. The UE 500 includes processing circuitry 502 that is operatively coupled via a bus 504 to an input / output interface 506, a power source 508, a memory 510, a communication interface 512, and / or any other component, or any combination thereof. Certain UEs may utilize all or a subset of the components shown in FIGURE 5. The level of integration between the components may vary from one UE to another UE. Further, certain UEs may contain multiple instances of a component, such as multiple processors, memories, transceivers, transmitters, receivers, etc. The processing circuitry 502 is configured to process instructions and data and may be configured to implement any sequential state machine operative to execute instructions stored as machine-readable computer programs in the memory 510. The processing circuitry 502 may be implemented as one or more hardware-implemented state machines (e.g., in discrete logic, field- programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), etc.); programmable logic together with appropriate firmware; one or more stored computer programs, general-purpose processors, such as a microprocessor or digital signal processor (DSP), together with appropriate software; or any combination of the above. For example, the processing circuitry 502 may include multiple central processing units (CPUs). The memory 510 may be or be configured to include memory such as random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic disks, optical disks, hard disks, removable cartridges, flash drives, and so forth. In one example, the memory 510 includes one or more application programs 514, such as an operating system, web browser application, a widget, gadget engine, or other application, and corresponding data 516. The memory 510 may store, for use by the UE 500, any of a variety of various operating systems or combinations of operating systems. The processing circuitry 502 may be configured to communicate with an access network or other network using the communication interface 512. FIGURE 6 shows a network node 600, which may be an embodiment of the network node 110 of FIGURE 5, in accordance with some embodiments. As used herein, network node refers to equipment capable, configured, arranged and / or operable to communicate directly or indirectly with a UE and / or with other network nodes or equipment, in a telecommunication network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs)). The network node 600 includes a processing circuitry 602, a memory 604, a communication interface 606, and a power source 608. Embodiments of the network node 600 may include additional components beyond those shown in FIGURE 6 for providing certain aspects of the network node’s functionality, including any of the functionality described herein and / or any functionality necessary to support the subject matter described herein. For example, the network node 600 may include user interface equipment to allow input of information into the network node 600 and to allow output of information from the network node 600. This may allow a user to perform diagnostic, maintenance, repair, and other administrative functions for the network node 600. FIGURE 7 illustrates an example method 700 by a UE for LTM CSI measurement reporting, according to certain embodiments. In the illustrated embodiment, the method includes a receiving step at 702, a determining step at 704, an including step at 706, and a transmitting step at 708. For example, at step 702, the UE may receiving a configuration including one or more LTM CSI resource(s) and at least one LTM CSI Reporting configuration. Each LTM CSI resource comprises an indication of a Reference Signal (RS) and an indication of an LTM candidate cell. The one or more LTM CSI resource(s) are associated to the at least one LTM CSI Reporting configuration. The at least one LTM CSI reporting configuration indicates a number “L” of LTM candidate cells to be included in an LTM CSI measurement report and a number “M” of RSs for each LTM candidate cell to be included in the LTM CSI measurement report. At step 704, for example, the UE may determine to transmit of the LTM CSI measurement report based on the LTM CSI reporting configuration. At step 706, the UE may include in the LTM CSI measurement report a subset of the LTM candidate cell(s) and / or the RS(s) of the LTM candidate cells configured as LTM CSI resource(s) based on one or more of the following criteria: o a) one or more measurement(s) of the LTM candidate cell(s) and / or the RS(s) configured as LTM CSI resource(s) and / or measurements of a serving cell; and / or o b) one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an RS; and / or o c) a synchronization state of an LTM candidate cell(s) and / or an RS; and / or o d) an indication of relevance of an LTM candidate cell for the network; and / or o e) a frequency and / or subcarrier spacing of an LTM candidate cell; and At step 708, the UE may transmit the LTM CSI measurement report the subset of the LTM candidate cell(s) and / or the RS(s) of the LTM candidate cells configured as LTM CSI resource(s). FIGURE 8 illustrates an example method 800 by a network node for receiving LTM CSI measurement reporting, according to certain embodiments. In the illustrated embodiment, the method includes a transmitting step at 802 and a receiving step at 804. For example, at step 802, the network node may transmit, to a User Equipment (UE), a configuration including one or more LTM CSI resource(s) and at least one LTM CSI Reporting configuration. Each LTM CSI resource comprises an indication of a Reference Signal (RS) and an indication of an LTM candidate cell. The one or more LTM CSI resource(s) are associated to the at least one LTM CSI Reporting configuration. The at least one LTM CSI reporting configuration indicates a number “L” of LTM candidate cells to be included in an LTM CSI measurement report and a number “M” of RSs for each LTM candidate cell to be included in the LTM CSI measurement report. At step 804, for example, the network node may receive, from the UE, the LTM CSI measurement report based on the LTM CSI reporting configuration. The LTM CSI measurement report includes and / or comprises a subset of the LTM candidate cell(s) and / or the RS(s) of the LTM candidate cells configured as LTM CSI resource(s) based on one or more of the following criteria: o a) one or more measurement(s) of the LTM candidate cell(s) and / or the RS(s) configured as LTM CSI resource(s) and / or measurements of a serving cell; and / or o b) one or more configuration(s) associated to an LTM execution (LTM cell switch) to a particular LTM candidate cell and / or to an RS; and / or o c) a synchronization state of an LTM candidate cell(s) and / or an RS; and / or o d) an indication of relevance of an LTM candidate cell for the network; and / or o e) a frequency and / or subcarrier spacing of an LTM candidate cell. FIGURE 9 illustrates an example method 900 by a UE for LTM CSI measurement reporting, according to certain embodiments. In the illustrated embodiment, the method includes a receiving step at 902 and a transmitting step at 904. For example, at step 902, the UE may receive, from a network node, one or more LTM CSI resource(s) and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: o a set of LTM candidate cells to be included in an LTM CSI measurement report; and o a set of Reference Signals each LTM candidate cell to be included in the LTM CSI measurement report; At step 904, for example, based at least on the LTM CSI reporting configuration, the UE may transmit a LTM CSI measurement report to the network node, the LTM CSI measurement report comprising measurement information associated with a subset of the set of the LTM candidate cell(s) and / or a subset of the set of the RSs of the LTM candidate cells configured as LTM CSI resource(s). FIGURE 10 illustrates an example method 1000 by a network node receiving LTM CSI measurement reporting, according to certain embodiments. In the illustrated embodiment, the method includes a transmitting step at 1002 and a receiving step at 1004. For example, at step 1002, the network node may transmit, to a User Equipment (UE), one or more LTM CSI resource(s) and at least one LTM CSI Reporting configuration. The at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: o a set of LTM candidate cells to be included in an LTM CSI measurement report; and o a set of Reference Signals (RSs) for each LTM candidate cell to be included in the LTM CSI measurement report. At step 1004, for example, based at least on the LTM CSI reporting configuration, the network node may receive a LTM CSI measurement report from the UE, wherein the LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cell(s) and / or a subset of the set of the RSs of the LTM candidate cells configured as LTM CSI resource(s).

Claims

CLAIMS 1. A method (200) at a user equipment, UE (412A), for Layer 1 / Layer 2-triggered Mobility, LTM, Channel State Information, CSI, measurement reporting, the method comprising: receiving (202), from a network node (410A), at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration, wherein the at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: o a set of LTM candidate cells; and o a set of Reference Signals, RSs, for each LTM candidate cell; and based at least on the at least one LTM CSI reporting configuration, transmitting (204) a first LTM CSI measurement report to the network node, wherein the first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs , and wherein the subset of the LTM candidate cells and / or the subset of the RSs of the LTM candidate cells is included in the first LTM CSI measurement report based on at least one of: one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells.

2. The method of Claim 1, comprising selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of the RSs to be included in the first LTM CSI measurement report.

3. The method of Claim 2, wherein selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of the RSs comprises:first selecting at least one LTM cell to be included in the first LTM CSI measurement report and then, for each LTM candidate cell, selecting at least one RS to be included in the first LTM CSI measurement report; or first selecting at least one RS to be included in the first LTM CSI measurement report and then selecting at least one LTM candidate cell to be included based on the selected RSs; or selecting one or more LTM candidate cells and one or mode RSs independently.

4. A method of any one of Claims 2 to 3, wherein selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs comprises selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs based on one or more rules and / or criteria.

5. The method of Claim 4, wherein selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs based on the one or more rules and / or criteria comprises: selecting an LTM candidate cell having a highest Reference Signal Received Power, RSRP, measured on an RS; or selecting an LTM candidate cell based on an order of appearance according to a list of RSs ordered with a highest RSRP measured first; or selecting an LTM candidate cell based on an average RSRP measured on detected RSs of an LTM candidate cell; or selecting an LTM candidate cell based on Layer 3, L3, measurements; or selecting an LTM candidate cell having a lowest pathloss calculated for an RS.

6. The method of Claim 4, wherein selecting the subset of the set of the one or more LTM candidate cells and / or the subset of the set of RSs based on the one or more rules and / or criteria comprises: selecting an LTM candidate cell based on an order of appearance according to a list of RSs that are ordered based on the lowest pathloss calculated; or selecting an LTM candidate cell based on an average pathloss calculated for all the RSs that belong to the LTM candidate cell; or selecting an LTM candidate cell having an average pathloss for the RSs below a certain threshold that belong to an LTM candidate cell.

7. The method of any one of Claims 1 wherein each LTM CSI resource configuration comprises an indication of an RS and an indication of an LTM candidate cell.

8. The method of Claim 7, wherein the indication of the RS comprises an Synchronization Signal Block, SSB, index and / or a position in a list in which an SSB index is included.

9. The method of any one of Claims 1 to 8, wherein the at least one LTM CSI resource configuration is associated to the at least one LTM CSI Reporting configuration.

10. The method of any one of Claims 1 to 9, wherein at least one of: the at least one LTM CSI reporting configuration indicates the set of LTM candidate cells by indicating a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report, and the at least one LTM CSI reporting configuration indicates the set of RSs by indicating a number “M” of RSs for each LTM candidate cell to be included in the first LTM CSI measurement report.

11. The method of any one of Claims 1 to 10, comprising at least one of: determining not to include, in the first LTM CSI measurement report, measurement information associated with at least one LTM candidate cell that is in the set of LTM candidate cells but not in the subset of LTM candidate cells; and / or determining not to include, in the first LTM CSI measurement report, measurement information associated with at least one RS that is in the set of RSs but not in the subset of RSs.

12. The method of any one of Claims 1 to 11, wherein at least one of: a number of configured LTM candidate cells in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration is higher than a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration; and a number of LTM CSI resources in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration, is higher than the number of “L” LTM candidate cells to be included in the first LTM CSI measurement report multiplied by a number of “M” RSs per LTM candidate cell to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration.

13. The method of any one of Claims 1 or wherein the first LTM CSI measurement report comprises a resource indicator associated to an LTM CSI resource and / or to an LTM candidate cell and / or to a RS, and wherein at least one of: the resource indicator comprises a position in a list of a plurality of RS identifiers in the at least one LTM CSI resource configuration associated to an identifier of a particular RS that is included in the first LTM CSI measurement report, and the resource indicator comprises a position in a list of a plurality of LTM candidate cells in the at least one CSI resource configuration associated to an identifier of a particular LTM candidate cell that is being included in the first LTM CSI measurement report.

14. The method of any one of Claims 1 to 13, wherein the first LTM CSI measurement report comprises measurement information associated to an LTM CSI resource.

15. The method of any one of Claims 1 to 14, wherein, for the at least one LTM candidate cell configuration, a number of RSs configured as LTM CSI resources is higher than a number of “M” RSs indicated in the at least one LTM CSI Reporting configuration that triggers the first LTM CSI measurement report.

16. The method of any one of Claims 1 to 15, comprising: after transmitting the first LTM CSI measurement report, transmitting a second LTM CSI measurement report triggered by a same LTM CSI reporting configuration that triggered the first LTM CSI measurement report, and wherein the second LTM CSI measurement report comprises measurement information for at least one LTM candidate cell and / or at least one RS that is different from the measurement information transmitted in the first LTM CSI measurement report.

17. The method of Claim 16, wherein the second LTM CSI measurement report is triggered based on a CSI reporting configuration indicating a transmission of periodic measurement reports.

18. The method of any one of Claims 1 to 17, wherein the RS comprises at least one of: a Synchronization Signal Block, SSB, an RS transmitted in a beam or spatial direction, a Mobility Reference Signal, MRS, and a Channel State Information-RS, CSI-RS.

19. A method (300) at a network node for receiving Layer 1 / Layer 2-triggered Mobility, LTM, Channel State Information, CSI, measurement reporting, the method comprising: transmitting (302), to a User Equipment, UE (412A), at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration, wherein the at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of Reference Signals, RSs, for each LTM candidate cell; based at least on the at least one LTM CSI reporting configuration, receiving (304) a first LTM CSI measurement report from the UE, wherein the first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs, and wherein the subset of the set of LTM candidate cells and / or the subset of the set of RSs is included in the first LTM CSI measurement report based on at least one of: one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells.

20. The method of Claim 19, wherein each LTM CSI resource configuration comprises an indication of an RS and an indication of an LTM candidate cell.

21. The method of Claim 20, wherein the indication of the RS comprises an Synchronization Signal Block, SSB, index and / or a position in a list in which an SSB index is included.

22. The method of any one of Claims 19 to 21, wherein the at least one LTM CSI resource configuration is associated to the at least one LTM CSI Reporting configuration.

23. The method of any one of Claims 19 to 22, wherein at least one of:the at least one LTM CSI reporting indicates the set of LTM candidate cells by indicating a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report, and the at least one LTM CSI reporting configuration indicates the set of RSs by indicating a number “M” of RSs for each LTM candidate cell to be included in the first LTM CSI measurement report.

24. The method of any one of Claims 19 to 23, wherein at least one of: a number of configured LTM candidate cells in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration is higher than a number of “L” LTM candidate cells to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration, and a number of LTM CSI resources in the at least one LTM CSI resource configuration associated to the at least one LTM CSI Reporting configuration is higher than the number of “L” LTM candidate cells to be included in the first LTM CSI measurement report multiplied by a number of “M” RSs per LTM candidate cell to be included in the first LTM CSI measurement report triggered by the at least one LTM CSI Reporting configuration.

25. The method of any one of Claims 19 to 24, wherein the first LTM CSI measurement report comprises a resource indicator associated to an LTM CSI resource and / or to an LTM candidate cell and / or to a RS, and wherein at least one of: the resource indicator comprises a position in a list of a plurality of RS identifiers in the at least one LTM CSI resource configuration associated to an identifier of a particular RS that is included in the first LTM CSI measurement report, and the resource indicator comprises a position in a list of a plurality of LTM candidate cells in the at least one LTM CSI resource configuration associated to an identifier of a particular LTM candidate cell that is being included in the first LTM CSI measurement report.

26. The method of any one of Claims 19 to 25, wherein the first LTM CSI measurement report comprises measurement information associated to an LTM CSI resource.

27. The method of any one of Claims 19 to 26, wherein, for the at least one LTM candidate cell configuration, a number of RSs configured as LTM CSI resources is higher than a number of“M” RSs indicated in the at least one LTM configuration that triggers the LTM CSI measurement report.

28. The method of any one of Claims 19 to 27, comprising: after receiving the first LTM CSI measurement report, receiving, from the UE, a second LTM CSI measurement report triggered by a same LTM CSI reporting configuration that triggered the first LTM CSI measurement report, and wherein the second LTM CSI measurement report comprises measurement information for at least one LTM candidate cell and / or at least one RS that is different from the measurement information transmitted in the first LTM CSI measurement report.

29. The method of Claim 28, wherein the second LTM CSI measurement report is triggered based on the CSI reporting configuration indicating a transmission of periodic reports.

30. The method of any one of Claims 19 to 29, wherein the RS comprises at least one of: a Synchronization Signal Block, SSB, an RS transmitted in a beam or spatial direction, a Mobility Reference Signal, MRS, and a Channel State Information-RS, CSI-RS.

31. A User Equipment, UE, for Layer 1 / Layer 2-triggered Mobility, LTM, Channel State Information, CSI, measurement reporting, the UE adapted to: receive, from a network node, at least one LTM CSI resource configurations and at least one LTM CSI Reporting configuration, wherein the at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of Reference Signals, RSs, for each LTM candidate cell; and based at least on the at least one LTM CSI reporting configuration, transmit a first LTM CSI measurement report to the network node, wherein the first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs , and wherein the subset of the LTM candidate cells and / or the subset of the RSs of the LTM candidate cells is included in the first LTM CSI measurement report based on at least one of:one or more measurements of least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; an indication of relevance of at least one LTM candidate cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells.

32. The UE of Claim 31, adapted to perform any of the methods of Claims 2 to 18.

33. A network node for receiving Layer 1 / Layer 2-triggered Mobility, LTM, Channel State Information, CSI, measurement reporting, the network node adapted to: transmit, to a User Equipment, UE, at least one LTM CSI resource configuration and at least one LTM CSI Reporting configuration, wherein the at least one LTM CSI Reporting configuration comprises and / or indicates at least one of: a set of LTM candidate cells; and a set of Reference Signals, RSs, for each LTM candidate cell; based at least on the at least one LTM CSI reporting configuration, receive a first LTM CSI measurement report from the UE, wherein the first LTM CSI measurement report comprises measurement information associated with a subset of the set of the LTM candidate cells and / or a subset of the set of the RSs, and wherein the subset of the LTM candidate cells and / or the subset of the RSs of the LTM candidate cells is included in the first LTM CSI measurement report based on at least one of: one or more measurements of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs; one or more configurations associated with an LTM cell switch to at least one LTM candidate cell in the set of candidate cells and / or at least one RS in the set of RSs; a synchronization state of at least one LTM candidate cell in the set of LTM candidate cells and / or at least one RS in the set of RSs;an indication of relevance of one LTM candidate cell in the set of LTM candidate cells for the network; and a frequency and / or subcarrier spacing of at least one LTM candidate cell in the set of LTM candidate cells.

34. The network node of Claim 33, adapted to perform any of the methods of Claims 20 to 30.

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