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.

Abstract: A system and a method of random access resource selection are provided. The method includes a target Base Station (BS) transmitting a first Synchronization Signal Block (SSB) to a User Equipment (UE), the first SSB associated with a first contention-free random access resource for the UE to transmit a random access preamble; the target BS transmitting a second SSB to the UE, the second SSB associated with a contention-based random access resource; and in a case that a first Synchronization Signal-Reference Signal Received Power (SS-RSRP) of the first SSB is not greater than an SS-RSRP threshold and a second SS-RSRP of the second SSB is greater than the SS-RSRP threshold, the target BS receiving the random access preamble from the UE using the contention-based random access resource.

Abstract: A method performed by a UE for wireless communications is provided. The method includes receiving first other system information from a base station, other system information including system information other than minimum system information broadcast by the base station; determining whether an SUL-related factor is present in the first other system information; transmitting an RRC system information request message to the base station in response to determining that the SUL-related factor is absent in the first other system information; and determining a minimum required received level based on the SUL-related factor in a case that the UE receives the SUL-related factor in second other system information from the base station; and determining a cell selection criterion based on the minimum required received level.

Abstract: A method for a Conditional Primary Secondary Cell Group (SCG) Cell (PSCell) Change (CPC) procedure performed by a master node is provided. The method includes receiving, from a user equipment (UE), a UE capability report indicating that the UE supports conditional reconfiguration for a PSCell change; transmitting, to the UE, a first conditional reconfiguration for changing from a source PSCell to a target PSCell in an SCG portion of a radio resource control (RRC) reconfiguration message, the first conditional reconfiguration including a configuration of the target PSCell and an execution condition; and receiving, from the UE, a response message after the first conditional reconfiguration is applied by the UE. The first conditional reconfiguration enables the UE to evaluate the execution condition, and apply the configuration of the target PSCell and synchronize to the target PSCell after the execution condition is evaluated as satisfied.

Abstract: A method and an apparatus for radio resource control (RRC) connection resume are provided. The RRC connection resume method, which is performed by user equipment (UE), includes: receiving an RRC suspend message including a Radio Access Network (RAN)-based Notification Area (RNA) update timer; transitioning to an RRC inactive state in response to receiving the RRC suspend message; triggering an RNA update procedure based on the RNA update timer during the RRC inactive state; and performing an RRC resume procedure according to the RRC suspend message.

Abstract: A method performed by a User Equipment (UE) includes receiving one of a stand-alone non-public network (SNPN) selection request, while the UE has stored at least one of cell (re)selection priorities (cellReselectionPriorities), deleting the stored at least one of cellReselectionPriorities when an SNPN selection in response to the SNPN selection request is performed by the UE, and stopping a T320 timer in response to receiving the SNPN selection request.

Abstract: Some of the present implementations provide a method for a user equipment (UE) for performing a random access (RA) procedure. The method receives, at the UE, an RA configuration and a reference signal received power (RSRP) threshold. The method then determines whether a detected RSRP exceeds the RSRP threshold once the RA procedure is initiated. If the detected RSRP exceeds the RSRP threshold, the method performs a two-step RA procedure.

Abstract: A method for radio access network (RAN) based notification area (RNA) update for a radio resource control (RRC)_INACTIVE user equipment (UE) in an RRC_INACTIVE state is disclosed. The method includes receiving, by the RRC_INACTIVE UE in the RRC_INACTIVE state, a first list of RAN area identities (IDs) from a first cell; receiving, by the RRC_INACTIVE UE in the RRC_INACTIVE state, identification information broadcast by a second cell, the identification information including a RAN area ID of the second cell and a cell ID of the second cell; and transmitting, by the RRC_INACTIVE UE in the RRC_INACTIVE state, at least one of an inactive-radio network temporary identifier (I-RNTI) and a cell ID of the first cell to the second cell, after determining that the RAN area ID of the second cell does not belong to the first list of RAN area IDs.

Abstract: A method for providing system information (SI) performed by a base station (BS) is provided. The method includes: broadcasting a system information block type 1 (SIB1) associated with a cell; receiving, from a user equipment (UE), a first message including a common control channel (CCCH) service data unit (SDU), the CCCH SDU including a radio resource control (RRC) SI request message; and transmitting, to the UE, a medium access control (MAC) control element (CE) including a UE contention resolution identity that matches a portion of the CCCH SDU. The MAC CE enables a MAC entity of the UE to indicate reception of an acknowledgment for the RRC SI request message to an RRC entity of the UE. The SIB1 does not include information related to a Random Access (RA) resource specific to SI requested by the RRC SI request message.

Abstract: Some of the present implementations provide a method for a first user equipment (UE) to deliver a sidelink measurement report to a second UE. The method receives sidelink measurement configuration through a PC5 radio resource control (RRC) connection between the first and second UEs. The method then generates the sidelink measurement report by monitoring at least one target resource pool allocated to the first UE via the sidelink measurement configuration and transmits the sidelink measurement report to the second UE through the PC5 RRC connection between the first and second UEs. The at least one target resource pool is associated with a first radio access technology (RAT) and the PC5 RRC connection between the first and second UEs is associated with a second RAT.

Abstract: A method and an apparatus for wireless communications are provided. The method is performed by a UE and includes: reading system information of a plurality of cells on a first carrier frequency to obtain identification information of a plurality of PLMNs; reporting, by an AS entity of the UE, the identification information of the plurality of PLMNs to a NAS entity of the UE; selecting, by the NAS of the UE, one of the plurality of PLMNs as a selected PLMN; searching for the plurality of cells on the first carrier frequency during a cell selection procedure; and selecting a suitable cell belonging to the selected PLMN from the plurality of cells on the first carrier frequency based on the cell selection procedure.

Abstract: A method of listen before talk (LBT) recovery procedure for a user equipment (UE) is provided. The method comprises performing an LBT failure detection procedure for a serving cell, triggering the LBT recovery procedure for the serving cell in response to detecting consistent uplink (UL) LBT failures in a first bandwidth part (BWP) on the serving cell according to the LBT failure detection procedure, where the LBT recovery procedure includes triggering an LBT failure procedure for determining the first BWP as an invalid BWP, and cancelling the triggered LBT recovery procedure for the serving cell in response to confirming a predefined condition in the UE.

Abstract: A user equipment (UE) includes one or more non-transitory computer-readable media containing computer-executable instructions embodied therein and at least one processor coupled to the one or more non-transitory computer-readable media. The at least one processor is configured to receive an indicator indicating that a Long-Term-Evolution (LTE)-Vehicle to Everything (V2X) sidelink (SL) communication is shared with New Radio (NR) SL communication on at least one of one or more carrier frequencies, and select one of the one or more carrier frequencies for the NR SL communication.

Abstract: Some of the present implementations provide a method for a base station (BS) for performing a random access (RA) procedure. The method includes transmitting, to a UE, a system information block (SIB) including a two-step RA configuration with a reference signal received power (RSRP) threshold, the SIB further indicating whether switching an RA procedure from a two-step type to a four-step type by the UE is allowed; and transmitting, to the UE, a four-step RA configuration, wherein: the UE determines whether a detected RSRP exceeds the received RSRP threshold once the RA procedure is triggered, and performs the RA procedure using the two-step type after determining that the detected RSRP exceeds the received RSRP threshold.

Abstract: A user equipment (UE) and a method for a power saving operation in one of a radio resource control (RRC)_INACTIVE state and an RRC_IDLE state are provided. The method includes receiving a first configuration from a base station (BS), the first configuration indicating a paging search space; receiving a second configuration from the BS, the second configuration indicating a first search space for monitoring a specific indication; monitoring a physical downlink control channel (PDCCH) in the first search space to detect the specific indication; and determining whether to monitor a paging occasion (PO) based on whether the specific indication is detected in the first search space, the PO being determined according to the paging search space.

Abstract: A user equipment (UE) and a method for performing a power saving operation are provided. The method includes receiving a radio resource control (RRC) configuration from a base station (BS), the RRC configuration configuring a set of one or more time durations; beginning monitoring a physical downlink control channel (PDCCH) on a plurality of PDCCH monitoring occasions; receiving an indicator on the PDCCH from the BS via downlink control information (DCI), the indicator indicating a first time duration among the set of one or more time durations; and skipping monitoring the PDCCH on one or more of the plurality of PDCCH monitoring occasions within the first time duration after receiving the indicator.

Abstract: A method of performing a power saving operation for a user equipment (UE) is provided. The method includes receiving, from a base station (BS), a plurality of power saving configurations, while the UE is in a radio resource control (RRC) idle state or an RRC inactive state, selecting one of the plurality of power saving configurations according to a rule predefined in the UE or a first indication received from the BS, and applying the selected one of the plurality of power saving configurations for the power saving operation.

Abstract: A method performed by a base station (BS) for power saving configuration is provided. The method includes receiving at least one of a first Resource Control (RRC) parameter or a second RRC parameter, the first RRC parameter indicating that a user equipment (UE) supports a first search space set group (SSSG) switching mechanism, and the second RRC parameter indicating that the UE supports a second SSSG switching mechanism; and transmitting, to the UE, one or more physical downlink control channel (PDCCH) configurations including one or more third RRC parameters, all of the one or more third RRC parameters indicating a same one of the first SSSG switching mechanism and the second SSSG switching mechanism.

Abstract: A user equipment and a method for a multi-Subscriber Identity Module (multi-SIM) operation are provided. The method includes registering to a first network associated with a first Subscriber Identity Module (SIM) and a second network associated with a second SIM; determining whether a paging collision associated with the first network and the second network is detected; and initiating a paging collision resolution procedure associated with a selected network to resolve the paging collision after the paging collision is detected, where the selected network is the first network or the second network.

Abstract: A method performed by a user equipment (UE) for transmitting uplink (UL) data in a radio resource control (RRC) INACTIVE state is provided. The method includes receiving, from a serving cell, a configuration of at least one UL resource associated with a normal UL (NUL) frequency carrier and a supplementary UL (SUL) frequency carrier of a plurality of UL frequency carriers; selecting one of the NUL frequency carrier or the SUL frequency carrier; initiating a small data transmission (SDT) procedure in the RRC_INACTIVE state to transmit, to the serving cell, at least one UL packet on the selected one of the NUL frequency carrier or the SUL frequency carrier via the at least one UL resource; and stopping the SDT procedure in a case that at least one predefined condition is fulfilled.