Abstract: A method of multiplexing logical channels (LCHs) in configured grants (CG) to enable faster transmission of high priority data in 5G New Radio-Unlicensed (NR-U) is proposed. Two options of imposing a CAPC-based restriction rule on multiplexing a low priority LCH with a high priority LCH are provided. In a first option, a threshold CAPC value is configured via RRC signaling. Data belonging to LCH having a priority lower than the CAPC threshold is not allowed to be multiplexed with data belonging to LCH having a priority higher than the CAPC threshold. In a second option, each CAPC has a flag indicating if the CPAC can have reduced priority via RRC signaling. If the flag is set for the CAPC, then data belonging to LCH assigned with the CAPC cannot be multiplexed with data belonging to lower priority LCHs.

Abstract: Various solutions for detecting consistent listen before talk (LBT) failure with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether an LBT failure is detected. The apparatus may start a first timer in an event that the LBT failure is detected. The apparatus may increase an LBT counter. The apparatus may determine whether the LBT counter reaches a threshold value. The apparatus may determine a consistent LBT failure event in an event that the LBT counter reaches the threshold value.

Abstract: Various solutions for power-efficient mechanism for multi-link operation with respect to user equipment and network apparatus in mobile communications are described. An apparatus may establish a first link and a second link with at least one of a plurality of network nodes. The apparatus may monitor the first link. The apparatus may stop monitoring the second link. The apparatus may determine whether a condition is triggered on the first link. The apparatus may activate the second link in response to the condition being triggered on the first link.

Abstract: Various solutions for autonomous retransmission on configured grant with respect to user equipment and network apparatus in mobile communications are described. An apparatus may start a first timer and a second timer when a transmission is performed on a hybrid automatic repeat request (HARQ) process configured for a configured grant. The apparatus may perform an autonomous retransmission using the configured grant when the second timer is expired. The apparatus may cancel restart of the first timer when the autonomous retransmission is performed. The apparatus may restart the second timer when the autonomous retransmission is performed. The apparatus may stop the second timer when the first timer expires. The apparatus may stop the second timer at the activation of a type 2 configured grant.

Abstract: An apparatus implemented in a user equipment (UE) transmits a first message (MsgA) in a two-step random access (RA) procedure to a wireless network. In response, the apparatus receives a second message (MsgB) in the two-step RA procedure from the wireless network. In an event that the MsgB comprises a backoff subheader, a content of the backoff subheader in the two-step RA procedure is identical to a content of a backoff subheader in a four-step RA procedure. MsgB comprises a FallbackRAR subPDU, the format of the FallbackRAR subPDU in the two-step RA procedure is identical to the format of a RAPID/RAR subheader and RAR payload in Msg2 in a four-step RA procedure. MsgB comprises a SuccessRAR subPDU, the format of the SuccessRAR subPDU in the two-step RA procedure uses the format of the SuccessRAR subPDU described herein.

Abstract: This innovation describes methods for an NR-based, LEO Non-Terrestrial Networks (NTN) to improve handover process by sending broadcast or group-cast downlink handover (HO) Command message to all (or group of) UEs in the coverage area (cell or beam-spot) of the LEO satellite. Subsequently, on receiving the broadcast (or group-cast) HO Command message, all the UEs in the source cell transmit HO Complete message to the source cell of the LEO-NTN. In order to reduce or avoid heavy Random Access (RA), generating from all the UEs, the LEO-NTN can either send Contention Free Random Access (CFRA), or instruct the UE to perform a random backoff before sending the uplink HO Complete message. Moreover, improvements to configure Conditional Handover (CHO) and delaying the transmission of HO Complete message are also provided.

Abstract: Various examples and schemes pertaining to utilization of assistance information for compensation for Doppler shift in non-terrestrial networks (NTNs) are described. A user equipment (UE) receives assistance information via an access link from a network node of an NTN such as a satellite or an unmanned aircraft system (UAS) platform. The UE then performs an operation with respect to communications with the network node based on the assistance information such as cell re-selection or beam switching.

Abstract: Various examples and schemes pertaining to simple Ethernet header compression are described. A first network node transmits a first packet with a full header to a second network node. The first network node determines whether a header compression context for the full header has been established by the second network node. In response to determining that the header compression context for the full header has been established by the second network node, the first network node transmits a second packet with a compressed header to the second network node. In response to determining that the header compression context for the full header has not been established by the second network node, the first network node transmits the second packet or a third packet with the full header to the second network node.

Abstract: Various solutions for power consumption reduction with multi-link operation with respect to user equipment and network apparatus in mobile communications are described. An apparatus may establish a first link with a first network node. The apparatus may establish a second link with a second network node. The apparatus may receive a dormancy indication via a physical layer signaling from the first network node. The apparatus may transit a dormancy state of the second network node according to the dormancy indication.

Abstract: Various solutions for skipping uplink transmission with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether a padding buffer status report (BSR) is included in a protocol data unit (PDU). The apparatus may skip transmission of the PDU when the padding BSR is included in the PDU. The PDU may comprise a medium access control (MAC) PDU. The MAC PDU may comprise no MAC service data unit (SDU).

Abstract: Various examples and schemes pertaining to resource configuration for MsgA in a two-step random access channel (RACH) procedure in mobile communications are described. An apparatus determines a time-frequency resource for transmission of a first message in a RACH procedure with a wireless network by using a one-to-one mapping between a RACH preamble sequence number and a first message resource index with the first message resource index indicating the time-frequency resource. The apparatus then transmits the first message in the time-frequency resource to the wireless network.

Abstract: Various solutions for transmission without dynamic scheduling with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a configured grant. The apparatus may select an allowed logical channel to use the configured grant. The apparatus may schedule uplink data from the allowed logical channel to a protocol data unit (PDU). The apparatus may transmit the PDU on the configured grant.

Abstract: Various solutions for handling data duplication with respect to user equipment and network apparatus in mobile communications are described. An apparatus may establish a first link and a second link with a network. The apparatus may generate a first protocol data unit (PDU) to transmit on the first link. The apparatus may generate a second PDU to transmit on the second link. The apparatus may transmit the first PDU on the first link. The apparatus may determine whether to discard the second PDU according to a condition. The second PDU may be duplicated from the first PDU.

Abstract: Various solutions for detecting consistent listen before talk (LBT) failure with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether an LBT failure is detected. The apparatus may start a first timer in an event that the LBT failure is detected. The apparatus may increase an LBT counter. The apparatus may determine whether the LBT counter reaches a threshold value. The apparatus may determine a consistent LBT failure event in an event that the LBT counter reaches the threshold value.

Abstract: Various solutions for skipping uplink transmission with respect to user equipment and network apparatus in mobile communications are described. An apparatus may determine whether a padding buffer status report (BSR) is included in a protocol data unit (PDU). The apparatus may skip transmission of the PDU when the padding BSR is included in the PDU. The PDU may comprise a medium access control (MAC) PDU. The MAC PDU may comprise no MAC service data unit (SDU).

Abstract: Various examples and schemes pertaining to overhead reduction in transmission of small Ethernet packets are described. When an apparatus receives a first packet over a wired link, with the first packet comprising a plurality of data bits and one or more first padding bytes, the apparatus removes the one or more first padding bytes from the first packet to provide an unpadded packet. The apparatus then transmits the unpadded packet over a wireless link. When the apparatus receives a second packet over the wireless link, the apparatus inserts one or more second padding bytes into the second packet to provide a padded packet having a length equal to a predefined minimum desired packet length. The apparatus also transmits the padded packet over the wired link.

Abstract: Various solutions for handling overlapped transmission opportunities with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive configurations allocating a first transmission opportunity and a second opportunity. The apparatus may determine whether the first transmission opportunity and the second transmission opportunity are overlapped. The apparatus may determine a priority of at least one of the first transmission opportunity and the second transmission opportunity according to a predetermined rule in an event that the first transmission opportunity and the second transmission opportunity are overlapped. The apparatus may perform a transmission according to the priority.

Abstract: Various examples and schemes pertaining to channel access priority class (CAPC) for uplink (UL) transmissions in New Radio (NR) unlicensed spectrum (NR-U) are described. An apparatus implemented in a user equipment (UE) receives, from a network node of a wireless network, a radio resource control (RRC) configuration indicating a first channel access priority class (CAPC) for one or more logical channels. The apparatus determines a second CAPC to be used for a listen-before-talk (LBT) procedure. The apparatus then performs the LBT procedure using the second CAPC to detect whether a channel is clear for transmission.

Abstract: Various examples and schemes pertaining to multiplexing, addressing and HARQ for MsgB in two-step RACH in mobile communications are described. An apparatus implemented in a user equipment (UE) transmits to a network node of a wireless network a first message containing a preamble index and data. In response, the apparatus receives from the network node a second message containing a random access response (RAR) and contention resolution information. The second message is addressed to either a cell radio network temporary identifier (C-RNTI) of the UE or a random access radio network temporary identifier (RA-RNTI).

Abstract: Various solutions for reducing power consumption with wake-up mechanism with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a configuration to monitor a wake-up indication (WUI) on predetermined occasions. The apparatus may monitor the WUI according to the configuration. The apparatus may determine whether the WUI is received. The apparatus may monitor a physical downlink control channel (PDCCH) in an event that the WUI is received.