Abstract: A method performed by a User Equipment (UE) includes receiving, through Radio Resource Control (RRC) signaling from a Base Station (BS), an indication indicating a dormancy cell group having at least a first serving cell and a second serving cell, receiving, through Physical Layer (PHY) signaling from the BS, a signal associated with a specific Downlink Control Information (DCI) format indicating a dormant behavior applicable to all serving cells in the dormancy cell group, wherein the signal indicates the dormant behavior via a single bit, applying the dormant behavior to the first serving cell and the second serving cell when the signal indicates that the dormant behavior is to be activated, and not applying the dormant behavior to the first serving cell and the second serving cell when the signal indicates that the dormant behavior is to be deactivated.

Abstract: A method for a UE for performing SDT is provided. The method includes receiving, from a BS, system information that includes a SIB1; determining whether to initiate an SDT procedure based on one or more conditions, the one or more conditions including the SIB1 including an SDT configuration; and initiating the SDT procedure in a case that the one or more conditions are fulfilled. A UE using the method is also provided.

Abstract: A method for a UE for performing a CG-SDT is provided. The method includes receiving a CG-SDT-specific RSRP threshold from a BS, the CG-SDT-specific RSRP threshold being configured to the UE for an SSB selection for the CG-SDT; in a case that one or more SSBs with RSRPs above the CG-SDT-specific RSRP threshold are available, performing the SSB selection to determine a first SSB index from one or more SSB indices of the one or more SSBs; and performing an initial transmission of the CG-SDT or a subsequent new transmission of the CG-SDT through a first UL grant corresponding to the first SSB index.

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 execute the computer-executable instructions to receive a dynamic grant for scheduling a first uplink (UL) resource, determine whether to obtain a first Medium Access Control (MAC) protocol data unit (PDU) for transmission using the first UL resource or to transmit a second MAC PDU before obtaining the first MAC PDU, and transmit the second MAC PDU using the first UL resource when the first UL resource is suitable for transmitting the second MAC PDU.

Abstract: A method for a user equipment (UE) to monitor paging messages is provided. The method monitors, while the UE is in an Idle mode, a physical paging channel (PPCH) for receiving paging messages associated with the UE from a serving radio access network (RAN). The method receives one or more paging messages associated with the UE while monitoring the PPCH. The method then determines, whether the one or more paging messages are received during a small data transmission (SDT) procedure. The method further determines whether to terminate the SDT procedure or not after determining that the one or more paging messages are received during the SDT procedure.

Abstract: A method and apparatus are disclosed from the perspective of a network node. In one embodiment, the method includes receiving a resource request to allocate SPS resource from a UE, wherein the resource request indicates a first logical channel. The method also allocating the UE with a first SPS resource and a second SPS resource for the first logical channel and a second logical channel associated with the first logical channel based on the resource request.

Abstract: A user equipment (UE) and a method for small data transmission (SDT) are provided. The method includes initiating an SDT procedure while the UE is in a Radio Resource Control (RRC) Inactive (RRC_INACTIVE) state; initiating a random access (RA) procedure before the SDT procedure is terminated; and determining whether to include a Cell-Radio Network Temporary Identifier (C-RNTI) Medium Access Control (MAC) Control Element (CE) in an uplink (UL) message during the RA procedure based on at least one condition. The at least one condition includes whether the SDT procedure corresponds to a Configured Grant (CG)-SDT procedure. The UL message is a message 3 (Msg3) in a case that the RA procedure is a 4-step RA procedure. The UL message is a message A (MsgA) in a case that the RA procedure is a 2-step RA procedure.

Abstract: A method and a user equipment (UE) for performing timing alignment is provided. The method includes receiving, from a Base Station (BS), a Timing Advance (TA) report configuration in System Information (SI); and transmitting, to the BS, a TA report based on the TA report configuration. The TA report configuration includes an indication for enabling or disabling the UE to transmit the TA report.

Abstract: A method for a user equipment (UE) to perform small data transmission (SDT) is provided. The method includes receiving, from a base station (BS), system information that includes an SDT configuration, the SDT configuration including an SDT-specific timer; initiating an SDT procedure when the UE is in a radio resource control (RRC) inactive (RRC_INACTIVE) state; triggering a Buffer Status Report (BSR) during the SDT procedure; and starting or restarting the SDT-specific timer in response to triggering the BSR.

Abstract: A method performed by a user equipment (UE) for wireless communication is provided. The method includes initiating a random access (RA)-based small data transmission (SDT) procedure while the UE is in a radio resource control (RRC) inactive state; starting a timer while the UE is in the RRC inactive state after initiating the RA-based SDT procedure; initiating an RA procedure; determining whether an RA problem associated with the RA procedure has occurred while the timer is running; and in response to determining that the RA problem of the RA procedure has occurred while the timer is running, transitioning from the RRC inactive state to an RRC idle state.

Abstract: A method for a user equipment (UE) performing a small data transmission (SDT) is provided. The method includes receiving, from a base station (BS), a radio resource control (RRC) release message that includes an SDT configuration when the UE is in an RRC_CONNECTED state; transitioning from the RRC_CONNECTED state to an RRC_INACTIVE state when the UE receives the RRC release message; initiating an SDT procedure based on the SDT configuration when the UE is in the RRC_INACTIVE state; obtaining a default configuration that is preconfigured for the UE and includes a Power Headroom Report (PHR) configuration; and applying the default configuration when the UE initiates the SDT procedure.

Abstract: A communication method and a User Equipment (UE) for operations with Bandwidth Part (BWP) switching are provided. The communication method is performed by a UE configured, by a Base Station (BS), with a serving cell and a dormancy group, the. The serving cell belongs to the dormancy group. The communication method includes activating a dormant BWP as an activated BWP for the serving cell; receiving, from the BS, one of a first indication for BWP switching for the serving cell and a second indication for BWP switching for the dormancy group; switching the activated BWP for the serving cell, based on one of the first indication and the second indication, from the dormant BWP to a non-dormant BWP; and triggering a first Power Headroom Reporting (PHR) upon switching the activated BWP for the serving cell from the dormant BWP to the non-dormant BWP.

Abstract: A method for a UE to monitor a PDCCH comprises receiving a first configuration from a base station to configure the UE with a first search space of the PDCCH, where the first search space is used for monitoring a scheduling signal used for indicating scheduling information, receiving a second configuration from the base station to configure the UE with a second search space of the PDCCH, wherein the second search space is used for monitoring a power saving signal used for indicating wake-up information associated with a DRX functionality, monitoring the first search space in response to the UE being in a DRX active time of the DRX functionality, wherein the DRX active time is a time during which the UE monitors the PDCCH, and not monitoring the second search space in response to the UE being in the DRX active time of the DRX functionality.

Abstract: A method performed by a user equipment (UE) is provided. In the method, at least one of a first configuration associated with a first operation of switching a search space set group and a second configuration associated with a second operation of skipping a physical downlink control channel monitoring are received. Downlink control information comprising a specific field associated with at least one of the first configuration and the second configuration is also received. When the first and second configurations are received, the first operation is performed based on a value in the specific field and the first configuration when the value in the specific field is one of a first set of values, and the second operation is performed based on the value in the specific field and the second configuration when the value in the specific field is one of a second set of values.

Abstract: A method for wireless communication performed by a user equipment (UE) is provided. The method includes: receiving, from a base station (BS), a radio resource control (RRC) message that includes a first configuration indicating a first parameter associated with a first bandwidth part (BWP) and a second configuration indicating a second parameter associated with a second BWP; receiving, from the BS, downlink control information (DCI) having a DCI format, the DCI indicating either a data reception or a data transmission on a BWP, and the DCI including a field indicating a hybrid automatic repeat request (HARQ) process number to be applied by the UE for the data reception or the data transmission; determining whether a bit length of the field is fixed or variable according to the DCI format; and in a case that the bit length of the field is variable, determining the bit length of the field according to one of the first parameter and the second parameter that is associated with the BWP.

Abstract: A method and a user equipment of search space monitoring are provided. The method includes: receiving first configured information corresponding to a plurality of search space set groups, wherein a number of the plurality of search space set groups is greater than two; receiving a downlink control information (DCI) which includes a DCI field with a value indicating a first search space set group in the plurality of search space set groups according to the first configured information; and monitoring for a physical downlink control channel in a search space set in response to the search space set being included in the first search space set group.

Abstract: A method and a user equipment (UE) for timing alignment is provided. The method comprises receiving, from a Base Station (BS), a first configuration indicating at least one of a scheduling offset, a common Timing Advance (TA), and satellite ephemeris information; receiving, from the BS, a second configuration indicating a TA offset for a TA variable; determining a UE-specific TA based on the satellite ephemeris information; determining a total TA based on at least one of the TA variable, the TA offset for the TA variable, the common TA, and the UE-specific TA; and starting, from a transmission by the UE, a time window after an additional time based on the total TA and the scheduling offset.

Abstract: A method and a user equipment for performing a Hybrid Automatic Repeat Request (HARQ) feedback operation are provided. The method includes: receiving, from a Base Station (BS), a first configuration indicating whether HARQ feedback for a HARQ process is enabled or disabled; receiving, from the BS, Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH), the DCI indicating (i) activation or deactivation of semi-persistent scheduling (SPS) and (ii) a Physical Downlink Shared Channel (PDSCH) reception for the HARQ process; and determining, based on a second configuration, and regardless of the HARQ feedback for the HARQ process is enabled or disabled, whether to transmit the HARQ feedback to the BS in response to the PDSCH reception in a case that the second configuration is received from the BS and the DCI indicates the activation of the SPS.

Abstract: A method and a user equipment for performing a Hybrid Automatic Repeat Request (HARQ) operation are provided. The method includes: receiving, from a Base Station (BS), a first configuration for a serving cell, the first configuration including a first bitmap for indicating a HARQ mode of each HARQ process in a first HARQ process set, each bit in the first bitmap being associated with a corresponding HARQ process in the first HARQ process set; and identify, based on the first bitmap, whether each HARQ process in the first HARQ process set is related to a first HARQ mode or a second HARQ mode.

Abstract: A method and apparatus are disclosed from the perspective of a UE (User Equipment). In one embodiment, the method includes the UE receiving a first MAC-CE (Medium Access Control-Control Element) including or indicating a plurality of TCI (Transmission Configuration Indication) state IDs (Identities) to be activated for receiving PDSCH (Physical Downlink Shared Channel), wherein format of the first MAC-CE depends on amount of the plurality of TCI state IDs. The method further includes the UE activating a plurality of TCI states associated with the plurality of TCI state IDs included or indicated in the first MAC-CE for receiving the PDSCH in response to reception of the first MAC-CE.