Abstract: A user equipment (UE) and a method performed by the UE are provided. The method includes transitioning from a radio resource control (RRC) inactive (RRC_INACTIVE) state to an RRC idle (RRC_IDLE) state upon determining that the UE has failed to find a suitable cell and camped on an acceptable cell; and discarding a radio access network (RAN) notification area (RNA) configuration that comprises at least one of a list of tracking area identities (IDs) or a list of RAN area IDs in response to the transitioning from the RRC_INACTIVE state to the RRC_IDLE state. The acceptable cell fulfills a minimum set of requirements to initiate an emergency call and to receive one or more Earthquake & Tsunami Warning System (ETWS) and Commercial Mobile Alert System (CMAS) notifications. The suitable cell provides normal services. The acceptable cell provides limited services.

Abstract: A method, a communication apparatus using the method, and a base station apparatus are disclosed. The method includes arranging user equipment to receive a downlink control channel signal associated with a physical downlink control channel; and configuring the user equipment to monitor the physical downlink control channel for control-resource set information. The control-resource set information corresponds to time and frequency resource allocation information related to the physical downlink control channel. The control-resource set information includes at least one parameter.

Abstract: A method for LBT failure detection performed by a UE is provided. The method includes: receiving, by a MAC entity of the UE, an LBT failure indication from a lower layer for all UL transmissions; increasing an LBT failure counter when the MAC entity receives the LBT failure indication; determining an LBT failure event occurs when the LBT failure counter is greater than or equal to a threshold; and resetting the LBT failure counter after the MAC entity has not received the LBT failure indication for a time period.

Abstract: A method for a user equipment (UE) for cell selection while the UE is in a radio resource control (RRC) Inactive state is provided. The method receives, via control signaling, a configuration indicating a target frequency carrier and a corresponding target core network (CN) type. The method then causes the UE to transition from an RRC Connected state to the RRC Inactive state based on the received configuration. While the UE is in the RRC Inactive state, the method selects a suitable cell among a plurality of suitable cells that are associated with the target frequency carrier. The method selects the suitable cell irrespective of the received target CN type.

Abstract: A method performed by a UE for saving power is provided. The method includes: receiving, from a Base Station (BS), control information that includes a Physical Downlink Control Channel (PDCCH) monitoring adaptation field, wherein the PDCCH monitoring adaptation field indicates a PDCCH skipping function; and monitoring, regardless of the PDCCH skipping function indicated by the PDCCH monitoring adaptation field, a PDCCH in a case that a Scheduling Request (SR) is transmitted on a Physical Uplink Control Channel (PUCCH) and is determined to be pending.

Abstract: A method performed by a BS for CHO is provided. The method includes transmitting a CHO command to a UE, the CHO command including a CHO command ID and a measurement ID associated with the CHO command ID; causing the UE to execute the CHO command to handover to a target BS when a trigger condition associated with the measurement ID is fulfilled; causing the UE to forgo transmitting the measurement report during the execution of the CHO command despite the UE being configured, via a report configuration associated with the measurement ID, to transmit the measurement report; transmitting, to the UE, a message that causes the UE to remove the CHO command; and after transmitting the message to the UE, determining that the report configuration is removed by the UE without transmitting, to the UE, an instruction to remove the report configuration.

Abstract: A method for a unified Transmission Configuration Indication (TCI) state operation performed by a user equipment (UE) is provided. The method includes receiving a first Radio Resource Control (RRC) configuration for configuring a first set of TCI states and a second set of TCI states; receiving a first indication for associating the first set of TCI states with a first channel, the first channel including a Physical Downlink Control Channel (PDCCH); receiving a second indication for associating the second set of TCI states with a second channel, the second channel being scheduled by first Downlink Control Information (DCI) received on the first channel; receiving a third indication for indicating at least one third TCI state to be applied on the second channel; and transmitting or receiving the second channel after applying the at least one third TCI state.

Abstract: A method for facilitating a CAG selection in an NPN is provided. The method includes transmitting a first indication to a UE. Upon the UE receiving the first indication, the UE is enabled to: in a case that an AS layer of the UE receives a request from a NAS layer of the UE and the CAG identity is determined by the UE to be included in the allowed CAG list, report, by the AS layer, the first indication and the CAG identity to the NAS layer, in a case that the CAG identity is determined not to be included in the allowed CAG list, report, by the AS layer, the first indication to the NAS layer to allow a manual selection of the CAG identity, and perform a cell selection or reselection procedure according to the CAG identity and the first indication.

Abstract: A method for a user equipment for performing a small data transmission (SDT) procedure is provided. The method includes receiving, from a base station, an SDT configuration including a plurality of uplink configured grant (UL-CG) configurations for the SDT procedure, each of the plurality of UL-CG configurations being associated with a downlink reference signal received power (DL-RSRP) threshold; applying one of the plurality of UL-CG configurations for the SDT procedure in a case that a DL-RSRP measurement result of a synchronization signal block (SSB) associated with the one of the plurality of UL-CG configurations is higher than one of a plurality of DL-RSRP thresholds; and initiating, during the SDT procedure, a random access (RA) procedure in a case that none of a plurality of DL-RSRP measurement results of a plurality of SSBs associated with the plurality of UL-CG configurations is higher than any of the plurality of DL-RSRP thresholds.

Abstract: A method performed by a user equipment (UE) for updating a location of the UE in a radio resource control (RRC) inactive state is provided. The method includes determining whether a small data transmission (SDT) procedure is ongoing in a case that an event for triggering a location update procedure occurs; and initiating the location update procedure in a case that the SDT procedure is not ongoing.

Abstract: A method for acquiring system information (SI) performed by a user equipment (UE) is provided. The method includes performing a first set of operations after determining that the UE is in a radio resource control (RRC)_CONNECTED state with an active bandwidth part (BWP) not configured with a common search space (CSS) with a field searchSpaceOtherSystemInformation; and performing a second set of operations after determining that the UE is in the RRC_CONNECTED state with the active BWP configured with the CSS with the field searchSpaceOtherSystemInformation. The first set of operations includes: transmitting a first RRC message to request a required system information block (SIB) and starting a timer; and receiving, from the cell, an RRCReconfiguration message including the required SIB. The second set of operations includes: transmitting the first RRC message to request the required SIB and starting the timer; and monitoring the CSS to acquire the required SIB.

Abstract: A user equipment (UE) and a method for power saving are provided. The method includes receiving a configuration indicating a plurality of search space set groups (SSSGs) that includes a first SSSG and one or more second SSSGs, the first SSSG being associated with a first SSSG identifier (ID); receiving downlink control information (DCI) on a physical downlink control channel (PDCCH) while monitoring the PDCCH on a UE-specific search space, the DCI including an information field indicating a value associated with the first SSSG ID; and starting PDCCH monitoring in the first SSSG and stopping PDCCH monitoring in the one or more second SSSGs from a slot that is at least a time offset after the last symbol of the DCI.

Abstract: A method of performing a closed access group (CAG) selection in a non-public network (NPN) for a user equipment (UE) is provided. The method includes receiving, from a CAG cell, a first indication and a CAG identity via a System Information Block 1 (SIB1), reporting, by an Access Stratum (AS) layer of the UE, to a Non-Access Stratum (NAS) layer of the UE, the first indication and the CAG identity when a request from the NAS layer is received, and performing a cell selection or reselection procedure according to the CAG identity, wherein the first indication is associated with the CAG identity and indicates that the CAG identity is allowed to be selected manually even if the CAG identity is not included in an allowed CAG list of the UE.

Abstract: A method performed by a first base station (BS) in a secondary cell group (SCG) associated with a user equipment (UE) is provided. The method receives, from a second BS in a master cell group (MCG) associated with the UE, a request for a configuration for packet data convergence protocol (PDCP) data duplication. The method then generates a mapping configuration for the PDCP data duplication in the SCG after receiving the request. The method transmits, to the UE, the mapping configuration.

Abstract: A UE for performing mobility management is disclosed. The UE includes at least one non-transitory computer-readable medium storing computer-executable instructions, and at least one processor coupled to the at least one non-transitory computer-readable medium, and configured to execute the computer-executable instructions to: transmit, to a first network node, a RRC message indicating a required network slice/service of the UE, the required network slice/service uniquely identified by S-NSSAI; receive, from the first network node, a second RRC message including information of a second network node that supports the required network slice/service of the UE when the required network slice/service identified by the S-NSSAI is not supported by the first network node; and perform a mobility management procedure based on the information of the second network node received from the first network node when the required network slice/service is not supported by the first network node.

Abstract: A method for LBT failure detection performed by a UE is provided. The method includes: receiving, by a MAC entity of the UE, an LBT failure indication from a lower layer for all UL transmissions; increasing an LBT failure counter when the MAC entity receives the LBT failure indication; determining an LBT failure event occurs when the LBT failure counter is greater than or equal to a threshold; and resetting the LBT failure counter after the MAC entity has not received the LBT failure indication for a time period.

Abstract: A method of a non-terrestrial network (NTN) assistance information update procedure for a user equipment (UE) is provided. The method includes receiving, by the UE from a first cell, first NTN assistance information associated with the first cell; and performing, by the UE, the NTN assistance information update procedure based on at least one of UE-specific control signaling or an NTN-specific system information block (SIB) by which the UE receives the first NTN assistance information.

Abstract: Methods and user equipment of sidelink discontinuous reception (SL-DRX) are provided. The method includes: rejecting a SL-DRX configuration of a sidelink service by transmitting one of a first signaling and a second signaling with a sidelink destination identity to a serving cell of the first UE according to a cast type of the sidelink service, wherein the sidelink destination identity is associated with the sidelink service and the SL-DRX configuration is configured by the serving cell; and in response to rejecting the SL-DRX configuration, disabling a SL-DRX mechanism for the sidelink service and the sidelink destination identity.

Abstract: A method for a system information (SI) request procedure performed by a user equipment (UE) is provided. The method includes: receiving a system information block type 1 (SIB1) from a cell; transmitting, to the cell, a first message including a common control channel (CCCH) service data unit (SDU)that includes a radio resource control (RRC) SI request message; receiving, from the cell, a medium access control (MAC) control element (CE) including a UE contention resolution identity; and indicating, by a MAC entity of the UE, reception of an acknowledgment for the RRC SI request message to an RRC entity of the UE after determining that the UE contention resolution identity matches multiple consecutive bits, starting from the most significant bit (MSB), of the CCCH SDU. The SIB1 does not include information related to a Random Access (RA) resource specific to SI requested by the RRC SI request message.

Abstract: A mobile communication device and a method performed by a mobile communication device are provided. The method includes receiving, from a device, a Radio Resource Control (RRC) connection reconfiguration message when a Signaling Radio Bearer 3 (SRB3) connection with a secondary node has not been established, the RRC connection reconfiguration message including Secondary Cell Group (SCG) information; and initiating establishing the SRB3 connection with the secondary node according to the RRC connection reconfiguration message.