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 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: In an example, a User Equipment (UE) receives a message associated with Physical Downlink Shared Channel (PDSCH) parameter configuration. The message includes a first parameter indicating a first list of entries associated with time resource allocation for multiple PDSCHs, a second parameter indicating reception of multiple repetitions for a single PDSCH, and a third parameter indicating a second list of entries associated with time resource allocation. Each entry in the second list indicates a single time resource allocation. If the UE receives a Downlink Control Information (DCI) indicative of a first entry in the first list, the UE receives a plurality of PDSCHs based on a plurality of time resource allocations indicated by the first entry. A first repetition number for the plurality of PDSCHs is determined to be one.

Abstract: Methods, systems, and apparatuses can comprise a User Equipment (UE) in a wireless communication system applying at least a unicast discontinuous reception (DRX) configuration associated with a first onDuration timer and/or a first Inactivity timer, applying at least a multicast DRX configuration associated with a second onDuration timer and/or a second Inactivity timer, receiving a DRX Command Medium Access Control (MAC) Control Element (CE) sent from a network by a periodic (pre)-configured downlink assignment for multicast, stopping the second onDuration timer, and stopping the second Inactivity timer.

Abstract: In an example, a User Equipment (UE) receives a message associated with Physical Downlink Shared Channel (PDSCH) parameter configuration. The message includes a first parameter indicating a first list of entries associated with time resource allocation for multiple PDSCHs, a second parameter indicating reception of multiple repetitions for a single PDSCH, and a third parameter indicating a second list of entries associated with time resource allocation. Each entry in the second list indicates a single time resource allocation. If the UE receives a Downlink Control Information (DCI) indicative of a first entry in the first list, the UE receives a plurality of PDSCHs based on a plurality of time resource allocations indicated by the first entry. A first repetition number for the plurality of PDSCHs is determined to be one.

Abstract: In an example, a device receives a configuration of a sidelink resource pool for sidelink data transmission and sidelink reference signal transmission. The device determines to perform a sidelink reference signal transmission in a first Transmission Time Interval (TTI) of the sidelink resource pool, wherein the sidelink reference signal transmission is associated with a destination identity (ID) and a source ID, and the sidelink reference signal transmission has a highest priority among one or more pending sidelink reference signals and one or more sidelink logical channels with pending sidelink data. The device generates a first sidelink data packet based on a first sidelink logical channel with first pending sidelink data, wherein the first sidelink data packet is associated with the destination ID and the source ID. The device performs, in the first TTI, the sidelink reference signal transmission and a sidelink data transmission for transmitting the first sidelink data packet.

Abstract: In an example, a device receives a configuration of a sidelink resource pool for sidelink data transmission and sidelink reference signal transmission. The device determines to perform a sidelink reference signal transmission in a first Transmission Time Interval (TTI) of the sidelink resource pool, wherein the sidelink reference signal transmission is associated with a destination identity (ID) and a source ID, and the sidelink reference signal transmission has a highest priority among one or more pending sidelink reference signals and one or more sidelink logical channels with pending sidelink data. The device generates a first sidelink data packet based on a first sidelink logical channel with first pending sidelink data, wherein the first sidelink data packet is associated with the destination ID and the source ID. The device performs, in the first TTI, the sidelink reference signal transmission and a sidelink data transmission for transmitting the first sidelink data packet.

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: Methods and apparatuses for handling discontinuous reception and partial sensing for sidelink communication to reduce potential latency due to additional sensing, and to improve resource utilization efficiency. A first device can perform sidelink communication to at least a second device, or a second device in a sidelink resource pool, and trigger to perform resource selection for a sidelink data at a timing. The first device can perform sensing for a first contiguous sensing duration before a sidelink on-duration active time of the second device, determine or select a first sidelink resource from a set of sidelink resources, derive or determine the set of sidelink resources based on at least a sensing result in the first contiguous sensing duration, and perform a first sidelink transmission on the first sidelink resource for transmitting the sidelink data to the second device.

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 of a first device can comprise receiving a sidelink resource pool configuration of a sidelink resource pool for sidelink reference signal, wherein comb-N structure or design is applied or utilized for sidelink reference signal resources in one occasion in the sidelink resource pool, and wherein the sidelink resource pool configuration comprises or provides one or more frequency or comb offsets, among N frequency or comb offsets associated with the comb-N structure or design, for determining one or more usable, available, or candidate sidelink reference signal resources, selecting or determining a first sidelink reference signal resource, among the one or more usable, available, or candidate sidelink reference signal resources, in the one occasion, and performing a first sidelink reference signal transmission on the first sidelink reference signal resource and performing a first Sidelink Control Information (SCI) transmission for scheduling the first sidelink reference signal transmission in the one o

Abstract: Methods, systems, and apparatuses can comprise a User Equipment (UE) in a wireless communication system applying at least a unicast discontinuous reception (DRX) configuration associated with a first onDuration timer and/or a first Inactivity timer, applying at least a multicast DRX configuration associated with a second onDuration timer and/or a second Inactivity timer, receiving a DRX Command Medium Access Control (MAC) Control Element (CE) sent from a network by a periodic (pre)-configured downlink assignment for multicast, stopping the second onDuration timer, and stopping the second Inactivity timer.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives and/or detects a multicast transmission of downlink data on a configured downlink multicast resource, wherein the multicast transmission is associated with a Hybrid Automatic Repeat Request (HARQ) process. The UE starts a multicast HARQ Round Trip Time (RTT) timer associated with the HARQ process. The UE determines whether to start a unicast HARQ RTT timer associated with the HARQ process based on whether the UE is configured with a Configured Scheduling Radio Network Temporary Identifier (CS-RNTI).

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives and/or detects a multicast transmission of downlink data on a configured downlink multicast resource, wherein the multicast transmission is associated with a Hybrid Automatic Repeat Request (HARQ) process. The UE starts a multicast HARQ Round Trip Time (RTT) timer associated with the HARQ process. The UE determines whether to start a unicast HARQ RTT timer associated with the HARQ process based on whether the UE is configured with a Configured Scheduling Radio Network Temporary Identifier (CS-RNTI).

Abstract: Methods, systems, and apparatuses can comprise a first device in a wireless communication system receiving configuration of one or more first sidelink resource pools for at least sidelink data transmission and configuration of one or more second sidelink resource pools for sidelink reference signal transmission, receiving a Downlink Control Information (DCI) for sidelink, wherein the DCI comprises a resource pool index corresponding to one sidelink resource pool, determining the DCI for scheduling sidelink data transmission or sidelink reference signal transmission based on at least the resource pool index or the one sidelink resource pool, acquiring or determining fields or information in the DCI based on the determination that the DCI is for scheduling sidelink data transmission or sidelink reference signal transmission, determining a sidelink resource based on the acquired or determined fields, or the information in the DCI, and performing a sidelink transmission on the sidelink resource in the one sidelin

Abstract: A method and device are disclosed from the perspective of a second User Equipment (UE) to configure Sidelink (SL) Discontinuous Reception (DRX). In one embodiment, the method includes the second UE initiating or initializing a sidelink service with a first UE. The method also includes the second UE determining a SL DRX configuration based on association between sidelink service and SL DRX configuration, wherein the SL DRX configuration is associated with the sidelink service. The method further includes the second UE monitoring sidelink control channel based on the SL DRX configuration.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a first device, a grant is received from a network node. The grant allocates a set of sidelink data resources. One or more sidelink data transmissions are performed on the set of sidelink data resources. A second feedback information associated with the one or more sidelink data transmissions is received and/or detected. An uplink resource is derived. A first feedback information is transmitted on the uplink resource to the network node. The first feedback information is set based upon the second feedback information.

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 partial sensing and discontinuous reception for sidelink communication to reduce potential latency due to additional sensing and to improve resource utilization efficiency. Various embodiments can comprise a first device performing sidelink communication to at least a second device, or a second device in a sidelink resource pool, and triggering to perform resource selection for a sidelink data at a timing, wherein the first device (already) receives or monitors sidelink control information for a (contiguous) time duration before the timing. The first device can perform sensing for a contiguous sensing duration after the timing, determine or select a first sidelink resource from a set of sidelink resources, and perform a first sidelink transmission on the first sidelink resource for transmitting the sidelink data to the second device.

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.