Abstract: Methods, systems, and apparatuses are provided for handling random access reporting in a wireless communication system, wherein a method of a User Equipment (UE) comprises receiving a first Physical Downlink Control Channel (PDCCH) order, initiating, in response to receiving the first PDCCH order, a first Random Access (RA) procedure to a candidate cell for early Timing Advance (TA) acquisition, storing a first RA information associated with the first RA procedure, and reporting the first RA information to a network in response to a request from the network.

Abstract: Methods, systems, and apparatuses are provided for handling sidelink reference signals for beam management in a wireless communication system, with a method of a first device comprising being scheduled or requested to perform one or more standalone Sidelink (SL) Channel State Information Reference Signal (CSI-RS) transmissions, receptions, or measurements in a first sidelink Transmission Time Interval (TTI) in a first sidelink resource pool in a sidelink carrier or cell, being scheduled or requested to perform a first sidelink data and/or feedback transmission or reception in the first sidelink TTI in the sidelink carrier or cell, and determining to perform either the one or more standalone SL CSI-RS transmissions, receptions, or measurements, or the first sidelink data and/or feedback transmission or reception in the first sidelink TTI, at least based on a parameter of a standalone SL CSI-RS.

Abstract: Methods, systems, and apparatuses are provided for sidelink transmission with beamforming in a wireless communication system, with a method of a first User Equipment (UE) comprising performing one or more unicast sidelink transmissions with one or more destinations comprising a second destination associated with a second UE, and transmitting information indicating a set of Transmission Time Intervals (TTIs) to a network node, wherein the set of TTIs corresponds to the second UE monitoring or receiving Sidelink Control Information (SCI) in the sidelink resource pool via a second beam associated with the first UE.

Abstract: Methods, systems, and apparatuses are provided for handling User Equipment (UE)-initiated beam change in a wireless communication system, with a method of a UE comprising triggering or initiating a UE-initiated beam switching associated with a Cell, transmitting a beam switching indication associated with the Cell in response to the UE-initiated beam switching, and performing, in response to considering the UE-initiated beam switching to be not successful, or expiration of a timer, at least one of: canceling the triggered UE-initiated beam switching associated with the Cell, and/or canceling a Scheduling Request (SR) associated with the UE-initiated beam switching, and/or stopping a Random Access (RA) procedure associated with the UE-initiated beam switching, and/or triggering a Beam Failure Recovery (BFR) associated with the Cell, and/or retransmitting the beam switching indication, and/or generating and transmitting a second beam switching indication.

Abstract: Methods, systems, and apparatuses are provided for enhancing timing alignment for uplink (UL) multi-Transmission/Reception Point (TRP) (or mTRP) scenarios in a wireless communication system. A method for a UE in a wireless communication system can comprise receiving a signaling, wherein the signaling indicates activation for a first TRP and/or is a Physical Downlink Control Channel (PDCCH) signal, determining to perform a first random access procedure on the first TRP, based on the signaling, to obtain a first Time Alignment (TA) information associated with the first TRP, and performing multi-TRP operation on the first TRP associated with the first TA information and a second TRP associated with a second TA information.

Abstract: Methods and apparatuses are provided for power headroom report regarding multiple TRPs in a wireless communication system. The systems and methods of the present invention address, expand, and improve how networks perform power control on multiple TRPs, how networks manage power control for uplink transmissions for different links, and how a UE derives one or more PH/PHR for different links.

Abstract: Methods, systems, and apparatuses are provided for handling timing advance for cells in a wireless communication system, comprising a User Equipment (UE) receiving a configuration indicating at least one candidate cell including a first candidate cell, storing a first Timing Advance (TA) associated with the first candidate cell, and clearing or discarding the first TA associated with the first candidate cell in response to at least one of: expiry of a timer associated with the first TA; performing Radio Resource Control (RRC) re-establishment; the UE entering RRC_IDLE state or RRC_INACTIVE state; a serving cell change; and/or the UE storing a second TA when a list or a set of stored TAs for the at least one candidate cell is full.

Abstract: Methods, systems, and apparatuses are provided for enhancing timing alignment for uplink (UL) multi-Transmission/Reception Point (TRP) (or mTRP) scenarios in a wireless communication system. A method for a UE in a wireless communication system can comprise receiving a signaling, wherein the signaling indicates activation for a first TRP and/or is a Physical Downlink Control Channel (PDCCH) signal, determining to perform a first random access procedure on the first TRP, based on the signaling, to obtain a first Time Alignment (TA) information associated with the first TRP, and performing multi-TRP operation on the first TRP associated with the first TA information and a second TRP associated with a second TA information.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives an uplink (UL) grant. The UL grant is indicative of a first Physical Uplink Shared Channel (PUSCH) transmission on a first Transmission/Reception Point (TRP) of a first cell. The UL grant is not indicative of a PUSCH transmission on a second TRP of the first cell. The UE transmits a Power Headroom Reporting (PHR) Medium Access Control (MAC) Control Element (CE). Based on the UL grant, the PHR MAC CE is indicative of a first power headroom (PH), associated with the first TRP, based on a real PUSCH transmission, and is indicative of a second PH, associated with the second TRP, based on a reference PUSCH transmission.

Abstract: A method a User Equipment (UE) can comprise receiving a configuration of a first Discontinuous Reception (DRX) timer with a value in number of symbols, receiving a configuration of a second DRX timer with a value in number of slot lengths, transmitting, via a Sidelink (SL) Hybrid Automatic Repeat Request (HARQ) process, a first SL transmission associated with SL configured grant Type 1, starting the first DRX timer for the SL HARQ process in response to the first SL transmission, wherein the UE determines a first symbol length associated with the first DRX timer based on a symbol length of an active Downlink (DL) Bandwidth Part (BWP) of a Primary Cell (PCell), starting the second DRX timer for the SL HARQ process in response to expiration of the first DRX timer which was started in response to the first SL transmission, wherein the UE determines a first slot length associated with the second DRX timer based on a slot length of the active DL BWP of the PCell, and monitoring Physical Downlink Control Channel (P

Abstract: Methods and apparatuses are provided for power headroom report regarding multiple TRPs in a wireless communication system. The systems and methods of the present invention address, expand, and improve how networks perform power control on multiple TRPs, how networks manage power control for uplink transmissions for different links, and how a UE derives one or more PH/PHR for different links.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a first device, the first device performs sidelink communication with a first set of destinations, wherein one or more devices, associated with a destination of the first set of destinations, discontinuously monitor one or more sidelink control channels and/or one or more sidelink control informations (SCIs). The first device receives a sidelink grant from a network, wherein the sidelink grant is for performing a sidelink transmission at a first timing. The first device selects, from among a second set of destinations, a first destination for the sidelink transmission, wherein each destination of the second set of destinations is determined to have an active time for sidelink containing the first timing.

Abstract: Methods, systems, and apparatuses are provided for a first device receiving configuration of one or more sidelink resource pools enabled or supported for sidelink reference signal transmission, triggering one or more sidelink reference signal resource requests for performing one or more sidelink reference signal transmissions, generating a first message for sidelink reference signal, wherein the first message for sidelink reference signal comprises information of the one or more sidelink reference signal resource requests, and wherein information of a sidelink reference signal resource request comprises any of a priority of sidelink reference signal, a destination index or Identity (ID) of sidelink reference signal, and a bandwidth (requirement) of sidelink reference signal, and transmitting the first message for sidelink reference signal to a network node.

Abstract: A method a User Equipment (UE) can comprise receiving a configuration of a first Discontinuous Reception (DRX) timer with a value in number of symbols, receiving a configuration of a second DRX timer with a value in number of slot lengths, transmitting, via a Sidelink (SL) Hybrid Automatic Repeat Request (HARQ) process, a first SL transmission associated with SL configured grant Type 1, starting the first DRX timer for the SL HARQ process in response to the first SL transmission, wherein the UE determines a first symbol length associated with the first DRX timer based on a symbol length of an active Downlink (DL) Bandwidth Part (BWP) of a Primary Cell (PCell), starting the second DRX timer for the SL HARQ process in response to expiration of the first DRX timer which was started in response to the first SL transmission, wherein the UE determines a first slot length associated with the second DRX timer based on a slot length of the active DL BWP of the PCell, and monitoring Physical Downlink Control Channel (P

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives, from a first cell, a first signaling indicative of a configuration of a Physical Downlink Control Channel (PDCCH) of a second cell. The UE receives, from the first cell, a second signaling indicative of switching a Special Cell (SpCell) of the UE to the second cell, wherein the second signaling includes a PDCCH signaling and/or a Medium Access Control (MAC) Control Element (CE). The UE monitors the PDCCH of the second cell in response to receiving the second signaling.

Abstract: Methods, systems, and apparatuses are provided for sidelink resource selection or exclusion of multi-consecutive slot transmission (MCSt) in a wireless communication system to enhance and/or modify Legacy sidelink Mode 2 operation for the MCSt. A method of a first device can comprise triggering or requesting sensing-based resource selection or re-selection for performing one or more Physical Sidelink Shared Channel (PSSCH) or Physical Sidelink Control Channel (PSCCH) transmissions in a sidelink resource pool in unlicensed or shared spectrum, determining a first parameter for determining or initializing candidate multi-slot resources, receiving a Sidelink Control Information (SCI) for reserving one or more sidelink resources, selecting a number of sidelink resources from valid/identified/remaining candidate multi-slot resources after exclusion, and performing the one or more PSSCH or PSCCH transmissions on at least one of the selected number of sidelink resources.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives, from a first cell, a first signaling indicative of one or more random access resources of a second cell. The UE receives, from the first cell, a second signaling indicative of switching a Special Cell (SpCell) of the UE to the second cell, wherein the second signaling comprises at least one of a Physical Downlink Control Channel (PDCCH) signaling or a Medium Access Control (MAC) Control Element (CE). The UE initiates a random access procedure on the second cell in response to receiving the second signaling, wherein the random access procedure is performed by the UE using the one or more random access resources.

Abstract: Methods, systems, and apparatuses for Sidelink Discontinuous Reception (SL DRX) in a wireless communication system to avoid ambiguity on slot offset calculations on SL DRX. A method for a UE comprises performing a SL communication associated with a destination Identity (ID), having a SL DRX configuration associated with the SL communication, wherein the SL DRX configuration comprises at least an on-duration timer and a DRX cycle, deriving a first offset associated with the SL communication based on the destination ID and the DRX cycle, deriving a second offset associated with the SL communication based on the destination ID and a number of slots per subframe, starting the on-duration timer after a time period determined based on the second offset from the beginning of a subframe, wherein the subframe is determined based on at least the first offset, and monitoring Sidelink Control Information (SCI) when the on-duration timer is running.

Abstract: Methods and apparatuses for handling device-to-device feedback transmission in a wireless communication system are disclosed herein. In one method, a first device receives a configuration for operating in a network scheduling mode for acquiring sidelink resources. The first device receives a sidelink control information with a report request from a second device. The first device triggers or is triggered to transmit a report to the second device in response to the report request. If the first device has no available sidelink resource for transmitting the report, the first device triggers a scheduling request. The first device transmits a signaling of the scheduling request to the network. The first device receives a sidelink grant from the network. The first device utilizes sidelink resource(s) indicated by the sidelink grant to transmit the report to the second device.

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 signaling containing mapping between resource allocation mode(s) and attribute(s) of sidelink data of the UE from a base station. The method further includes the UE performing a sidelink transmission of the sidelink data based on the mapping between the resource allocation mode(s) and the attribute(s) of the sidelink data.