Abstract: This application relates to the field of wireless communications technologies, and in particular, to a communication method, apparatus, and system. This application provides a communication method. The method includes: a user equipment sends a first message to a secondary base station, where the first message is used to indicate that an exception occurs on a connection between the user equipment and a master base station; and the user equipment receives a second message sent by the secondary base station, where the second message is used to indicate whether to recover the connection to the master base station. This aims to quickly recover the connection between the user equipment and the master base station through interaction between the user equipment and the secondary base station, thereby reducing interruptions of data transmission and/or signaling transmission, and further improving system performance and user experience.

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: Apparatuses, methods, and systems are disclosed for indicators for physical downlink shared channel transmissions. One method (1200) includes receiving (1202), at a user equipment, a physical downlink control channel signal. The physical downlink control channel signal is associated with a physical downlink shared channel transmission, and the physical downlink control channel signal includes a control information field. The control information field includes a first indicator and a second indicator. The first indicator and the second indicator correspond to the physical downlink shared channel transmission, the first indicator corresponds to physical downlink shared channel transmissions using a first transmission mode, and the second indicator corresponds to physical downlink shared channel transmissions using a second transmission mode.

Abstract: The present application relates to a method and an apparatus for performing a Primary Secondary Cell (PSCell) change procedure. One embodiment of the present disclosure provides a method, which includes: receiving first information associated with a user equipment (UE) for a secondary node (SN) change or a primary secondary cell (PSCell) change; and/or receiving second information associated with one or more candidate nodes for the SN change or the PSCell change; and determining an action regarding the SN change or the PSCell change with a machine learning (ML) model based on the first information and/or the second information.

Abstract: Embodiments of the present application are directed to a method and apparatus for data transmission processing. In an embodiment, the method includes: determining a radio link failure (RLF) happens in a small data transmission (SDT) procedure; and performing a procedure in response to the happening of the RLF in an SDT procedure.

Abstract: The present application relates to a method and an apparatus for determining a prediction for a status of a wireless network. One embodiment of the present disclosure provides a method for determining a prediction for a status of a wireless network, comprising: transmitting a first request associated with the prediction to a first node and a second node; receiving information of a trained AI model from the second node; transmitting, to the first node, input for the trained AI model; and receiving the prediction from the first node, wherein the prediction is determined based on the trained AI model and the input.

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: 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: 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 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: 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: 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: 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: 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.