Abstract: A method and apparatus are disclosed from the perspective of a UE configured with DRX. In one embodiment, the method includes the UE starting a period in response to start of an UL transmission. The method also includes the UE monitoring a puncturing indication during the period. The method further includes the UE suspending the UL transmission if the puncturing indication is received by the UE.

Abstract: A method and apparatus are disclosed from the perspective of a first device for performing sidelink transmission in a sidelink resource pool. In one embodiment, the first device has a configuration of the sidelink resource pool, wherein the sidelink resource pool is enabled with resource reservation for different Transport Blocks (TBs). The first device also has a configuration of a list of reserved periods. Furthermore, the first device selects or determines a first reserved period from the list of reserved periods, wherein the first selected or determined reserved period is within a first set of reserved periods. In addition, the first device randomly selects a first integer in a first interval, wherein the first interval is based on a scaling factor and a second interval, and the scaling factor is derived based on a largest reserved period in the first set of reserved periods, and wherein the first integer indicates a number of transmission opportunities of different TBs with the first reserved period.

Abstract: Methods and apparatuses for handling collision between sidelink feedback and sidelink data in a wireless communication system are disclosed herein. In one method, a User Equipment (UE) is (pre-)configured to perform one or more sidelink transmissions on multiple carriers, wherein the UE is able to transmit a first number of carriers among the multiple carriers at the same time. The UE selects a first resource for transmitting a first sidelink transmission in a first slot on a first carrier. The UE derives a second resource for transmitting a PSFCH delivering a feedback in a second slot on a second carrier, wherein the second slot is at least partly overlapping with the first slot in a time domain. The UE determines whether to prioritize either the PSFCH or the first sidelink transmission based on a rule when the number of carriers which the UE identifies to transmit in the overlapped slot exceeds the first number of carriers.

Abstract: A method and apparatus are disclosed from the perspective of a UE, wherein the UE is allocated with multiple SR configurations by a network node. In one embodiment, the method includes the UE triggering a MAC control element if a timer expires. The method also includes the UE triggering a SR for the MAC control element. The method also includes the UE transmitting the SR based on a first SR configuration of the multiple SR configurations, wherein the first SR configuration is associated with a highest priority logical channel having data available for transmission when the MAC control element is triggered.

Abstract: A method and apparatus are disclosed from the perspective of a UE. In one embodiment, the method includes the UE receiving a configuration of functionality of PRB bundling from a base station. The method also includes the UE receiving an indication from the base station regarding whether the functionality of PRB bundling is applied to a TTI or not.

Abstract: A method and apparatus are disclosed from the perspective of a UE (User Equipment). In one embodiment, the method includes the UE receiving and/or monitoring a first control region via a first link. The method further includes the UE transmitting a first request if the first link fails. The method also includes the UE receiving and/or monitoring a second control region for a response via a second link within a time window associated with the first request. In addition, the method includes the UE receiving and/or monitoring the first control region after the time window associated with the first request is over.

Abstract: A method and apparatus are disclosed from the perspective of a User Equipment (UE). In one embodiment, the method includes the UE performing transmission and/or reception in a serving cell, wherein the serving cell is in unlicensed spectrum. The method further includes the UE being configured to receive slot format indication (SFI) on periodic SFI monitoring occasion(s), wherein periodic SFI monitoring occasion(s) is (pre-)configured by a network. The method also includes the UE, in response to receiving and/or detecting a channel indicator, monitoring and/or detecting a first SFI-related signal on a first occasion, wherein the first occasion is not one of (pre-)configured periodic SFI monitoring occasion(s).

Abstract: A method and apparatus are disclosed from the perspective of a User Equipment (UE) in a wireless communication system, wherein the UE is configured with and/or is served in a serving cell by a network, wherein an active UL (Uplink) BWP (Bandwidth Part) of the UE is activated in the serving cell. In one embodiment, the method includes the UE receiving an indication and/or a configuration, which is indicative of or associated with a first value of the TRP (Transmission/Reception Point) identifier and a second value of the TRP identifier. The method also includes the UE receiving an indication and/or a configuration, which is indicative of or associated with a first group of PUCCH (Physical Uplink Control Channel) resource(s) of the active UL BWP, wherein the first group of PUCCH resource(s) is associated with or related to the first value of the TRP identifier.

Abstract: A method and apparatus are disclosed from the perspective of a first User Equipment (UE) in RRC_CONNECTED to request sidelink resources. In one embodiment, the method transmits a first RRC (Radio Resource Control) message to a network node, wherein a presence of a sidelink QoS (Quality of Service) information list in the first RRC message is optional.

Abstract: Methods and apparatuses for triggering a beam state information report by a user equipment in a wireless communication system are disclosed herein. In one method, a user equipment measures multiple beam reference signals of non-serving beams from a cell and derives multiple values from measurements. The UE derives a first value, wherein the first value is a highest value, a lowest value, or an average value of the multiple values. The UE triggers to report a measurement result for a beam reference signal if at least one condition is satisfied, wherein the condition is based on comparing the first value to a threshold.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE) configured with logical channel based prioritization, the UE determines prioritization between a first uplink (UL) grant and a first scheduling request based on a first logical channel associated with triggering the first scheduling request, wherein the first UL grant and the first scheduling request overlap in time domain. The UE receives a second UL grant, wherein the second UL grant and a second scheduling request overlap in time domain. The UE prioritizes the second UL grant over the second scheduling request based on the second UL grant being addressed to a Temporary Cell Radio Network Temporary Identifier (C-RNTI) of the UE.

Abstract: Methods and apparatuses estimating pathloss of PUSCH in a wireless communication system are disclosed herein. In one method, the UE receives a first configuration of a first serving cell and a second serving cell, wherein the second serving cell is a pathloss reference for the first serving cell. The UE receives a second configuration of multiple downlink bandwidth parts of the second serving cell, wherein a downlink bandwidth part among the multiple downlink bandwidth parts is an active downlink bandwidth part. The UE estimates (or derives) a pathloss for an uplink transmission in an uplink bandwidth part of the first serving cell based on a reference signal in the downlink bandwidth part.

Abstract: A method and device are disclosed from the perspective of a first Wireless Transmit/Receive Unit (WTRU). In one embodiment, the method includes the first WTRU triggering a first buffer status report (BSR), wherein the first BSR indicates an amount of data expected to arrive. The method also includes the first WTRU triggering a second BSR, wherein the second BSR indicates an amount of data already available. The method further includes the first WTRU generating a MAC (Medium Access Control) PDU (Protocol Data Unit), wherein the MAC PDU includes at most one first BSR MAC CE (Control Element) for the first BSR and at most one second BSR MAC CE for the second BSR.

Abstract: A method and apparatus are disclosed from the perspective of a first device for performing sidelink communication. In one embodiment, the first device includes a MAC CE in a MAC PDU, wherein if the MAC PDU comprises the MAC CE without data, SL HARQ feedback is disabled for the MAC PDU. The first device further includes sidelink data associated with a first sidelink logical channel in the MAC PDU, wherein the first sidelink logical channel is configured to enable sidelink HARQ feedback. The first device also sets or indicates enable SL HARQ feedback for the MAC PDU in a SCI, wherein the SCI schedules a sidelink transmission delivering the MAC PDU. Furthermore, the first device transmits the SCI and performs the sidelink transmission to a second device.

Abstract: A method and apparatus are disclosed. In an example, a first node may trigger a scheduling request (SR) based upon an expected transmission from a second node which is a child node of the first node. The first node may determine a first SR configuration for the SR from a plurality of SR configurations configured to the first node.

Abstract: A method and apparatus are disclosed from the perspective of a network node. The method includes the network node configuring a UE (User Equipment) with a first DRB (Data Radio Bearer), such that the first DRB is configured with a presence of SDAP (Service Data Adaptation Protocol) header and the network node is not allowed to reconfigure the first DRB for changing the presence of SDAP header to an absence of SDAP header after the first DRB is established. The method further includes the network node configuring the UE to serve a first QoS (Quality of Service) flow and a second QoS flow by the first DRB. The method also includes re-configuring the UE to serve the first QoS flow by a second DRB, which was originally served by the first DRB, when the second QoS flow is released or removed from the first DRB, such that the second DRB is configured with an absence of SDAP header.

Abstract: A method and apparatus are disclosed. In an example, a User Equipment (UE) is configured with a size associated with downlink control information (DCI) corresponding to one or more preemption indications. In some examples, the size is equal to a first value that is not a multiple of a defined value. Alternatively and/or additionally, the UE is configured with a starting position of a field associated with the DCI. The starting position is equal to a second value that is a multiple of the defined value. Alternatively and/or additionally, a first DCI comprising a first preemption indication is transmitted to the UE based upon the size and/or the starting position.

Abstract: A method and apparatus are disclosed from the perspective of a first UE (User Equipment) in RRC_CONNECTED to detect configuration failure. In one embodiment, the method includes the first UE transmitting a first PC5 RRC (Radio Resource Control) message to a second UE, wherein the first PC5 RRC message includes an AS (Access Stratum)-layer configuration for a unicast link established with the second UE. The method also includes the first UE transmitting a fourth RRC message to a network node if a configuration failure of the AS-layer configuration is detected, wherein the fourth RRC message indicates the configuration failure occurs.

Abstract: A method and apparatus are disclosed from the perspective of a UE (User Equipment) to handle a sidelink buffer status report (SL BSR). In one embodiment, the method includes the UE transmitting a SL BSR to a network node, wherein a format of the SL BSR includes at least one field of buffer size associated with HARQ (Hybrid Automatic Repeat Request) feedback enabled and one field of buffer size associated with HARQ feedback disabled. The method also includes the UE receiving a sidelink grant from the network node. The method further includes the UE selecting data from a logical channel for transmission according to a HARQ feedback mode of the logical channel and whether the sidelink grant is associated with a HARQ feedback resource or not.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE determines whether a beam associated with a reference signal of a cell has an In-Device Coexistence (IDC) problem. The UE determines whether to include information associated with the reference signal in a report based on whether the beam associated with the reference signal has the IDC problem. The UE transmits the report to a network node.