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. In an example from the perspective of a User Equipment (UE), the UE receives a first Radio Resource Control (RRC) message from a network node, wherein the first RRC message is indicative of a first uplink (UL) Bandwidth Part (BWP) of a cell. In response to initiation of a procedure to use a configured grant (CG) resource in RRC inactive state, the UE performs BWP switching from a second UL BWP of the cell to the first UL BWP of the cell. The UE performs, on the first UL BWP, a first UL transmission using the CG resource. In response to completion of the procedure, the UE performs BWP switching from the first UL BWP of the cell to the second UL BWP of the cell.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE initiates a first Early Data Transmission (EDT) in RRC_INACTIVE state. Responsive to initiating the first EDT, the UE initiates a Random Access (RA) procedure in a cell configured with a normal uplink (NUL) carrier and a supplementary uplink (SUL) carrier. The UE selects the SUL carrier or the NUL carrier for performing the RA procedure based on at least one of whether there are one or more available Physical Random Access Channel (PRACH) resources for EDT on the SUL carrier or whether there are one or more available PRACH resources for EDT on the NUL carrier.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE triggers a Power Headroom Report (PHR) when the UE is in Radio Resource Control (RRC) inactive state. The UE determines whether or not to cancel the PHR based upon whether or not an uplink (UL) resource for transmission in the RRC inactive state can accommodate first pending data available for transmission.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE initiates a first Early Data Transmission (EDT) in RRC_INACTIVE state. Responsive to initiating the first EDT, the UE initiates a Random Access (RA) procedure in a cell configured with a normal uplink (NUL) carrier and a supplementary uplink (SUL) carrier. The UE selects the SUL carrier or the NUL carrier for performing the RA procedure based on at least one of whether there are one or more available Physical Random Access Channel (PRACH) resources for EDT on the SUL carrier or whether there are one or more available PRACH resources for EDT on the NUL carrier.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE initiates a Random Access (RA) procedure. The UE selects, from multiple carriers, a carrier for the RA procedure based on a measured Reference Signal Received Power (RSRP). The UE determines, based on the measured RSRP, whether or not to use a Physical Random Access Channel (PRACH) resource, associated with Message 3 (Msg3) repetition, for Message 1 (Msg1) transmission of the RA procedure, wherein the determination is performed after the selecting the carrier.

Abstract: A method and apparatus are disclosed from the perspective of a User Equipment (UE), wherein the UE is configured with multiple Bandwidth Parts (BWPs). In one embodiment, the method includes the UE receiving information from a network node to associate a RACH (Random Access Channel) configuration with a BWP among the multiple BWPs. The method further includes that the UE performing a RACH transmission in the BWP using the RACH configuration associated with the BWP.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives a configuration, of a logical channel, associated with 2-step Random Access (RA) procedure. The UE triggers a Regular Buffer Status Report (BSR) for the logical channel. The UE determines whether to initiate a first 2-step RA procedure or to initiate a first 4-step RA procedure based on the configuration of the logical channel.

Abstract: A method and apparatus are disclosed from the perspective of a UE. In one embodiment, the method includes triggering a first SR by a first LCH, wherein the first LCH is associated with a first SR configuration. The method also includes triggering a second SR by a second LCH while the first SR is pending, wherein the second LCH is associated with a second SR configuration, and the first SR configuration and the second SR configuration are configured for the same serving cell. The method further includes using a first SR opportunity and a second SR opportunity to transmit SRs to a network node until the SRs are cancelled, wherein the first SR opportunity corresponds to the first SR configuration and the second SR opportunity corresponds to the second SR configuration.

Abstract: Methods and apparatuses for selecting beam for preconfigured uplink resources in a wireless communication system are disclosed herein. In one method, a user equipment (UE) receives, from a network node, a signaling to configure at least one Preconfigured Uplink Resource (PUR) associated with one or more beams from multiple beams. The UE selects a first beam from the multiple beams and performs a transmission of data in RRC_INACTIVE state using the at least one PUR via the first beam if the first beam fulfills at least one condition, wherein the at least one condition comprises that the first beam is associated with the at least one PUR and Reference Symbol Received Power (RSRP) of the first beam is better than a first threshold. The UE initiates a Random Access (RA) procedure and performs the transmission during the RA procedure if no beam of the multiple beams fulfills the at least one condition.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE initiates a Random Access (RA) procedure. The UE selects, from multiple carriers, a carrier for the RA procedure based on a measured Reference Signal Received Power (RSRP). The UE determines, based on the measured RSRP, whether or not to use a Physical Random Access Channel (PRACH) resource, associated with Message 3 (Msg3) repetition, for Message 1 (Msg1) transmission of the RA procedure, wherein the determination is performed after the selecting the carrier.

Abstract: Methods and apparatuses of handling a bandwidth part (BWP) inactivity timer during a Random Access procedure in a wireless communication system are disclosed herein. In one method, a user equipment (UE) starts a BWP timer for a serving cell operating in a paired spectrum. The UE initiates a contention-based Random Access (RA) procedure on the serving cell and stops the BWP timer. The UE starts the BWP timer upon successful completion of the RA procedure, wherein the UE considers the contention-based RA procedure successfully completed if a Physical Downlink Control Channel (PDCCH) addressed to a Cell Network Temporary Identifier (C-RNTI) of the UE is received and the PDCCH contains an uplink grant for a new transmission.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives, from a network node, a paging message indicative of Mobile-terminated Early Data Transmission (MT-EDT). Responsive to receiving the paging message, the UE determines a validity of a timing parameter associated with one or more Preconfigured Uplink Resources (PUR). The UE determines, based on the validity, whether to initiate a Random Access (RA) procedure for MT-EDT or to initiate a transmission using the one or more PURs.

Abstract: Methods and apparatuses for selecting beam for preconfigured uplink resources in a wireless communication system are disclosed herein. In one method, a user equipment (UE) receives, from a network node, a signaling to configure at least one Preconfigured Uplink Resource (PUR) associated with one or more beams from multiple beams. The UE selects a first beam from the multiple beams and performs a transmission of data in RRC_INACTIVE state using the at least one PUR via the first beam if the first beam fulfills at least one condition, wherein the at least one condition comprises that the first beam is associated with the at least one PUR and Reference Symbol Received Power (RSRP) of the first beam is better than a first threshold. The UE initiates a Random Access (RA) procedure and performs the transmission during the RA procedure if no beam of the multiple beams fulfills the at least one condition.

Abstract: A method and device are disclosed from the perspective of a User Equipment (UE). In one embodiment, the UE initiates a Small Data Transmission (SDT) procedure in RRC_INACTIVE state. Furthermore, the UE transmits a Radio Resource Control (RRC) message to network in response to arrival of a first data, to be transmitted to the network, during the SDT procedure, wherein the first data is not allowed to be transmitted via the SDT procedure.

Abstract: A method and device are disclosed from the perspective of a User Equipment (UE). In one embodiment, the method includes the UE receiving a first Physical Downlink Control Channel (PDCCH)-related configuration in system information. The method further includes the UE initiating a Small Data Transmission (SDT) procedure in RRC_INACTIVE state, wherein the SDT procedure comprises a Random Access (RA) procedure and at least one subsequent transmission after the RA procedure. The method also includes the UE monitoring PDCCH, based on the first PDCCH-related configuration, during the RA procedure in RRC_INACTIVE state. In addition, the method includes the UE monitoring the PDCCH, based on a second PDCCH-related configuration, for the at least one subsequent transmission in RRC_INACTIVE state if the second PDCCH-related configuration is received by the UE.

Abstract: A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), the UE receives a first Radio Resource Control (RRC) message from a network node, wherein the first RRC message is indicative of a first uplink (UL) Bandwidth Part (BWP) of a cell. In response to initiation of a procedure to use a configured grant (CG) resource in RRC inactive state, the UE performs BWP switching from a second UL BWP of the cell to the first UL BWP of the cell. The UE performs, on the first UL BWP, a first UL transmission using the CG resource. In response to completion of the procedure, the UE performs BWP switching from the first UL BWP of the cell to the second UL BWP of the cell.

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 first node supporting wireless access and wireless backhaul. In one embodiment, the method includes the first node transmitting a first message to a second node, for updating a second routing path maintained by the second node.

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.