Abstract: A communication method and a device are described to compress and decompress a data packet including an ethernet header to reduce radio transmission resources of an air interface. The communication method includes determining, by a sending device, a to-be-sent data packet. The to-be-sent data packet is a data packet including an ethernet header. The method further includes determining, by the sending device, a field to be compressed in the header of the to-be-sent data packet; and compressing, by the sending device, the header of the to-be-sent data packet according to a preset method. The preset method includes: removing the field to be compressed from the header of the data packet, or replacing the field to be compressed with a corresponding short field; and sending, by the sending device, a data packet obtained after the compressing.

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from one or more peer UEs. The controller determines a Sidelink (SL) Discontinuous Reception (DRX) configuration set, and applies the SL DRX configuration set to enable a DRX operation for SL communications with the peer UEs via the wireless transceiver; wherein the SL DRX configuration set is determined based on one of the following: one or more types of one or more SL services which the UE is participating with the peer UEs; one or more SL DRX configurations received from the peer UEs; and control information received from a Base Station (BS).

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a first UE. In certain configurations, the first UE operates in an idle or inactive protocol state in a service of a first cell and performs a discovery procedure with a second UE, wherein the discovery procedure includes indicating, to the second UE, an identity of the first cell. The first UE further performs a cell reselection procedure to a second cell, receives, from the second UE, subsequent to the performing the cell reselection procedure, a message for forwarding to the first cell, and sends, to the second UE, a notification message, wherein the notification message includes an indication of an inability to forward the message.

Abstract: Aspects of the disclosure provide a method for a first user equipment (UE) that has a first path to a network to add a second path to the network. For example, the method can include receiving, at the first UE, a first radio resource control (RRC) message from the network for addition of the second path. The method can also include configuring, by the first UE, the second path based on the first RRC message.

Abstract: Apparatus and methods are provided for transmission prioritization between uplink and sidelink. In one novel aspect, transmission prioritization is performed between uplink data transmission and sidelink physical channel/signal transmissions, including feedback channel (PSFCH). In one embodiment, PSFCH transmission is prioritized over the UL transmission when the highest logic channel priority value of the UL transmission with available data is larger than a configured UL priority threshold.

Abstract: A method includes: performing, by a terminal device, data transmission based on a configuration parameter of a currently activated first bandwidth part BWP, where the configuration parameter of the first BWP includes at least one of a first resource offset, a first bandwidth, and a first subcarrier spacing; determining, by the terminal device, a first random access resource and a second configuration parameter for random access, where the second configuration parameter includes at least one of a second resource offset, a second bandwidth, and a second subcarrier spacing; sending, by the terminal device, a random access request to the network device on the first random access resource; and receiving, by the terminal device, a random access response based on the second configuration parameter, where the random access response is sent by the network device based on the random access request.

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from one or more peer UEs. The controller determines a Sidelink (SL) Discontinuous Reception (DRX) configuration set, and applies the SL DRX configuration set to enable a DRX operation for SL communications with the peer UEs via the wireless transceiver; wherein the SL DRX configuration set is determined based on one of the following: one or more types of one or more SL services which the UE is participating with the peer UEs; one or more SL DRX configurations received from the peer UEs; and control information received from a Base Station (BS).

Abstract: Apparatus and methods are provided for multicast broadcast service (MBS) transmission and reception on secondary cell (SCell) or non-serving cell. In one novel aspect, the UE receiving unicast from a serving PCell, reports assistance information for receiving MBS to the PCell and receives MBS from the non-serving cell or the SCell simultaneously with the reception of the unicast. In one embodiment, the assistance information includes one or more elements comprising supported band combination, common frequency resource (CFR) configuration, the number of component carrier, MIMO layer, modulation order and subcarrier spacing. In one embodiment, the UE receives adjustment configuration for the unicast in preparation for the MBS reception. In one embodiment, one or more CCs for the unicast is deactivated/released for the MBS reception. In one embodiment, the two-step procedure, which is the broadcast control channel (BCCH) and MBS control channel (MCCH), is used for the MBS reception.

Abstract: A method for mobility management implemented by a user equipment (UE) includes measuring a reference signal thereby producing mobility measurements for a mobility procedure, wherein the reference signal is associated with one of a cell or a bandwidth part (BWP), and scaling the mobility measurements in accordance with at least one BWP parameter.

Abstract: A method executed by a relay UE is provided. The relay UE receives an incoming SideLink (SL) transmission from the first remote UE on the first RLC channel, wherein the first RLC channel is associated with an SL Radio Bearer (SLRB) ID, in which the incoming SL transmission includes the first identifier, which includes the SLRB ID and a first UE ID. The relay UE sends an outgoing SL transmission to a second remote UE on a second RLC channel according to the SLRB ID and the first UE ID.

Abstract: A method executed by a relay UE is provided. The relay UE establishes a first Radio Link Control (RLC) channel between a first remote UE and the relay UE, in which the first RLC channel is associated with a first end-to-end identifier. The relay UE establishes a second RLC channel between a second remote UE and the relay UE, in which the second RLC channel is associated with the first end-to-end identifier or a second end-to-end identifier. The relay UE receives an incoming SideLink (SL) transmission from the first remote UE on the first RLC channel, in which the incoming SL transmission includes the first end-to-end identifier. The relay UE sends an outgoing SL transmission to the second remote UE on the second RLC channel, in which the outgoing SL transmission includes one of the first end-to-end identifier and the second end-to-end identifier.

Abstract: Apparatus and methods are provided for the UE to receive multicast transmission in RRC INACTIVE state. In one embodiment, the UE joins a multicast session, receives a MRB configuration for a multicast service, establishes an MRB for reception of the multicast service in the RRC INACTIVE state, and receives data transmission of the multicast service with the established MRB in the RRC INACTIVE state. In one embodiment, the UE stores the MRB configuration in the buffer when the multicast session has not started when the MRB configuration is received. In one embodiment, the UE receives a notification for the multicast session start in the RRC INACTIVE state and establishes the MRB based on the stored MRB configuration. In one embodiment, the UE, in the INACTIVE state, updates the multicast resource/MTCH information based on one or more predefined conditions.

Abstract: Apparatus and methods are provided for HARQ operation with a UE combined HARQ process for the MBS. In one novel aspect, the UE established a UE combined HARQ process to receive HARQ transmissions for the MBS from both the PTM leg and the PTP leg. In one embodiment, the HARQ transmission received from the PTM leg is from a network PTM HARQ process and the HARQ transmission received from the PTP leg is from a network PTP HARQ process for the UE. The new data indicator (NDI) or the redundant version (RV) value is used to indicate a HARQ retransmission. In one embodiment, the network PTM HARQ process and the network PTP HARQ process uses the same HARQ ID. In another embodiment, HARQ ID information is carried in DCI for the PTM leg and the PTP leg for MBS data packets.

Abstract: A method includes: performing, by a terminal device, data transmission based on a configuration parameter of a currently activated first bandwidth part BWP, where the configuration parameter of the first BWP includes at least one of a first resource offset, a first bandwidth, and a first subcarrier spacing; determining, by the terminal device, a first random access resource and a second configuration parameter for random access, where the second configuration parameter includes at least one of a second resource offset, a second bandwidth, and a second subcarrier spacing; sending, by the terminal device, a random access request to the network device on the first random access resource; and receiving, by the terminal device, a random access response based on the second configuration parameter, where the random access response is sent by the network device based on the random access request.

Abstract: A method for application-specific traffic handling is provided. A service data unit (SDU) can be received at a radio protocol layer in a radio access network (RAN) protocol stack. The SDU carries application data that is generated from an application layer and passes through multiple protocol layers existing between the application layer and the radio protocol layer. At the radio protocol layer, the SDU is inspected to obtain characteristic information from one or more protocol headers corresponding to one or more protocol layers among the multiple protocol layers. The characteristic information indicates characteristics of the application data. At the radio protocol layer, the SDU is classified into one of multiple classes based on the characteristic information obtained from the one or more protocol headers. At the radio protocol layer, the SDU is processed according to which one of the multiple classes the SDU is classified into.

Abstract: An apparatus operated as a relay node in a wireless mesh network for route discovery comprises processing circuitry that receives, from a first neighbor node, a discovery request including a request for a route to a destination node. When the routing table of the first node contains routes to the destination node, the first node sends, to the first neighbor node, a discovery response including information about these routes. When the routing table of the first node does not contain a route to the destination node, the first node sends, to a second neighbor node, a discovery request for a route to the destination node. When the first node receives, from the second neighbor node, a discovery message including information of routes to a destination node. The first node transmits, to the first neighbor node, a discovery response including information of these routes.

Abstract: Apparatus and methods are provided for sidelink relay based data transmission with multiple paths. In one novel aspect, multiple transceiving paths is established between a source node and a destination, wherein at least one path includes a sidelink connection with a relay node. The sidelink relay adaptation protocol (SRAP) layer or the PDCP layer of the source node performs data split or data duplication for egress data packets before delivering the egress data to multiple corresponding RLC entities. The source node aggregates ingress data packets received from the multiple transceiving paths at the source node. In one embodiment, one transceiving path among the multiple transceiving paths is selected as a primary path. In one embodiment, the source node performs data split or data duplication at the SRAP layer per packet or per RB. In another embodiment, the source node performs data split or data duplication based on a preconfigured threshold.

Abstract: This disclosure provides an apparatus operated as a relay node in a wireless mesh network for packet routing. The apparatus comprises processing circuitry that receives a packet including indications of a source node and a destination node. When the relay node is not the destination node, the processing circuitry determines whether the packet includes a path ID identifying a delivery route for the packet. When the packet includes the path ID and a routing table of the relay node includes a first next-hop node associated with the path ID, the processing circuitry transmits the packet to the first next-hop node. When the packet does not include the path ID or the routing table does not include the first next-hop node, the processing circuitry transmits the packet to one of a second next-hop node associated with the destination node and a third next-hop node associated with an intermediate destination node.

Abstract: Apparatus and methods are provided for MBS reception with duplicate data packets. In one novel aspect, the UE establishes a protocol stack with a PTM leg and a PTP leg, receives duplicated data packets from both the PTM leg and the PTP leg, and processes the duplicated data packets from the PTM and the PTP legs at a duplication protocol layer. The MBS data packets are duplicated at corresponding duplication protocol layer at the network node. The UE duplication protocol layer is either the PDCP layer, or the RLC layer, or the PHY layer. The RLC layer includes a PTM RLC entity and a PTP RLC entity when the RLC SN are different in the PTM. The UE duplication protocol layer combines received data packets and/or discards duplicated data packets from the PTM leg and the PTP leg.

Abstract: Apparatus and methods are provided for setting initial PDCP state variables for multicast services. In one novel aspect, the UE sets initial PDCP state variables for the MBS session based on configuration values received from the network. In one embodiment, the UE receives dedicated RRC signaling from the network, which contains initial HFN value and the SN of the next PDCP PDU to be transmitted. In one embodiment, the one or more configuration values are provided in RRC Reconfiguration, RRCResume, or RRCSetup message, according to different RRC states of UE. In one embodiment, the UE initializes the RX_DELIV value based on the configuration value of HFN and SN received from the wireless network. When receiving the one or more configuration values of initial PDCP state variables, UE sets HFN to initial HFN value and sets RX_DELIV to the COUNT value of next PDCP PDU to be transmitted by network.