Abstract: This application provides a wireless communication method and apparatus. The method includes: determining reference information, where the reference information includes information about first duration and/or information about a first cell, the first duration includes duration in which a terminal device is in an inactive state, and the first cell includes a cell in which the terminal device performs an RNAU; and sending the reference information.

Abstract: Embodiments of the present application relate to a method and apparatus for user equipment (UE) discovery. An exemplary method includes: generating a first discovery message for UE discovery; delivering the first discovery message to a PC5 signalling (PC5-S) layer of a first UE; generating a PC5-S message, wherein the PC5-S message includes discovery information of the first discovery message; and broadcasting the PC5-S message including the discovery information via a signalling radio bearer (SRB). Embodiments of the present application can implement transmission of messages during the discovery procedure and realize a ranging based service during the discovery procedure.

Abstract: This application provides a data transmission method and an apparatus. The method includes that an integrated access and backhaul (IAB) donor distributed unit receives downlink data and service attribute information of downlink data that are sent by an IAB donor centralized unit. The IAB donor distributed unit maps the downlink data to a corresponding backhaul radio link control channel (BH RLC) channel based on the service attribute information of the downlink data or based on the service attribute information of the downlink data and access IAB node address information of the downlink data, and sends the downlink data to a next-hop IAB node.

Abstract: This application provides a transmission method and a data transmission apparatus, so as to avoid out-of-order of data packets.

Abstract: The present disclosure discloses example communication apparatuses. One example communication apparatus includes sending request information from a first network device to a second network device, where the request information includes an identifier of a network slice, configuration information of a data radio bearer corresponding to the identifier of the network slice, and first general packet radio service tunneling protocol-user plane (GTP-U) tunnel address information corresponding to the identifier of the network slice. Feedback information is received by the first network device and from the second network device, where the feedback information includes second GTP-U tunnel address information corresponding to the identifier of the network slice. The first GTP-U tunnel address information and the second GTP-U tunnel address information identify a user plane tunnel that corresponds to the identifier of the network slice and that is between the first network device and the second network device.

Abstract: Embodiments of the present application relate to methods and apparatuses for handling configured grant (CG) information when a secondary cell group (SCG) is deactivated in a multi-radio dual connectivity (MR-DC) scenario under a 3rd Generation Partnership Project (3GPP) 5G New Radio (NR) system or the like. According to an embodiment of the present application, a method may be performed by a UE and can include: receiving CG information from a network, wherein the CG information is for an uplink transmission from the UE to the network, and wherein the CG information is associated with a primary secondary cell (PSCell) of a SCG in relation to the UE; and in response to deactivation of the SCG, handling the CG information by at least one of: releasing the CG information from the UE; suspending the CG information in the UE; and maintaining the CG information in the UE.

Abstract: An RRC connection method, including generating, by a first terminal, a first RRC message, and sending, by the first terminal, a first indication and first data to a second terminal through a first path, where the first path is a wireless communications interface between the first terminal and the second terminal, the first data includes the first RRC message, and the first indication is used to indicate the second terminal to send the first RRC message to a radio access network device.

Abstract: The present disclosure discloses example communication methods, apparatuses, and mediums. One example method includes selecting a target side identifier corresponding to a communication type by a media access control (MAC) entity of a first terminal device, where the communication type includes unicast communication, multicast communication, or broadcast communication, and the target side identifier includes a destination layer 2 identifier or a destination layer 1 identifier. A first sidelink logical channel (LCH) is obtained by the MAC entity of the first terminal device, where the first sidelink LCH is an LCH having a highest priority among LCHs that correspond to the target side identifier and the communication type and that have data. A transmission resource to data on the first sidelink LCH is allocated by the MAC entity of the first terminal device.

Abstract: The present disclosure provides communications methods and apparatuses. One method includes: receiving, by a first communication node, first indication information from a second integrated access and backhaul (IAB) node, wherein the first indication information indicates that a radio link failure (RLF) occurs on a backhaul (BH) link on a first communication path between the first communication node and a second communication node, wherein the first communication node is a terminal device or a first IAB node, and wherein the second IAB node is on the first communication path, and reporting, by the first communication node, second indication information through a second communication path between the first communication node and the second communication node, wherein the second indication information indicates that the RLF occurs on the BH link on the first communication path.

Abstract: Embodiments of the present application relate to methods and apparatuses for a primary secondary cell (PSCell) addition procedure or a PSCell change procedure considering a deactivated state of a secondary cell group (SCG) associated with a PSCell in a multi-radio dual connectivity (MR-DC) scenario under a 3rd Generation Partnership Project (3GPP) 5G system or the like. According to an embodiment of the present application, a method may be performed by a UE and can include: receiving configuration information from a network, wherein the configuration information is associated with a PSCell addition procedure or a PSCell change procedure for a SCG; determining whether the PSCell addition procedure or the PSCell change procedure is successfully completed when the SCG is in a deactivated state; and in response to determining that the PSCell addition procedure or the PSCell change procedure has failed, transmitting failure information to the network.

Abstract: Disclosed are methods and apparatus for user equipment to network relay handover. An embodiment of the subject application provides a method performed by a relay node. The method includes receiving a radio resource control reconfiguration message including a reconfiguration with synchronization from a serving cell, and transmitting a handover associated indication to a remote user equipment via sidelink communication in response to reception of the RRC reconfiguration message including the reconfiguration with synchronization. In addition, the relay node may transmit the indication associated with successful handover to the remote UE via sidelink communication after successful handover.

Abstract: Embodiments of the present application relate to a method and apparatus for multicast and broadcast services (MBS). An exemplary method includes: transmitting a set of user data packet over a shared tunnel for multicast data radio bearer (M-DRB) and unicast data radio bearer (U-DRB), wherein each of the set of user data packet is associated with at least one of: a M-DRB; and one or more U-DRBs; and receiving a data delivery status frame for each of the at least one of the M-DRB and one or more U-DRBs. Embodiments of the present application can support the user plane protocol in the case of multiple transmission modes in the MBS.

Abstract: This application provides a communication method and a communication system. A central unit (CU) obtains a quality of service (QoS) parameter of a QoS data flow and performs mapping the QoS data flow to a bearer based on the QoS parameter of the QoS data flow. The CU determines a QoS parameter of the bearer based on the QoS parameter of the QoS data flow and sends a context setup request message to a distributed unit (DU), wherein the context setup request message comprises the QoS parameter of the bearer, the QoS parameter of the QoS data flow and the mapping relationship between the QoS data flow and the bearer.

Abstract: A first terminal receives first sidelink (SL) carrier configuration information from a second terminal, the first SL carrier configuration information includes first bandwidth part (BWP) configuration information, and the first BWP configuration information includes one or more first resource pools; the first terminal performs unicast connection communication with the second terminal based on the first BWP configuration information.

Abstract: A communication method includes: a first communication apparatus obtains first configuration information and sends the first configuration information to a second communication apparatus, where the first configuration information includes configuration information of a first sidelink radio bearer which is used to carry a first unicast service between the first communication apparatus and the second communication apparatus, and the first sidelink is a radio link between the first communication apparatus and the second communication apparatus.

Abstract: Embodiments of the present disclose a wireless communication in an IAB network. The method performed by an IAB node may include: transmitting, to a first IAB donor, a first resource configuration for a mobile terminal (MT) of the IAB node, wherein a distributed unit (DU) of the IAB node is connected to the first IAB donor and the MT of the IAB node is connected to or is for handing over to the second IAB donor: and receiving, from the first IAB donor, a second resource configuration for the DU of the IAB node, wherein the second resource configuration is determined based on the first resource configuration.

Abstract: This application provides a communication method in multi-rat dual connectivity, an apparatus, and a system. In the method, when a PDCP SN length of a bearer is changed, an SN sends a PDCP SN length change indication to an MN, so that the MN and the SN can generate release and addition configuration information for the bearer for a terminal, thereby completing the change of the PDCP SN length.

Abstract: Methods and apparatus of Signaling Radio Bearer (SRB) transmission using Small Data Transmission (SDT) are disclosed. The method includes: a base station receiving, from UE in RRC_INACTIVE or RRC_IDLE state, a small data packet, wherein the small data packet includes an SRB (Signaling Radio Bearer); sending a retrieve UE context request to a last serving base station of the UE; and receiving, from the last serving base station, UE context for anchor relocation, or SRB data forwarding information and/or a SRB configuration, for transmission of the small data packet.

Abstract: A method includes: a first terminal device receives first information from a network device, where the first information includes an indication information of a first unicast connection and a reference signal configuration corresponding to the first unicast connection, the reference signal configuration is used by the first terminal device to send a reference signal to a second terminal device; and the first terminal device sends the reference signal to the second terminal device on a sidelink based on the reference signal configuration.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for storing and/or reporting information relating to a primary secondary cell (PSCell) change procedure in a multi-radio dual connectivity (MR-DC) scenario and/or a LTE-LTE DC scenario. According to an embodiment of the present disclosure, a method which may be performed by a UE includes: detecting a presence of a trigger condition before or during a PSCell change procedure from a source PSCell to a target PSCell in relation to the UE or after successfully completing the PSCell change procedure: and in response to detecting the presence of the trigger condition, storing information relating to the PSCell change procedure.