A handover method and apparatus, a storage medium, and a terminal are provided, the method including: generating, by a relay UE. replacement indication information based on cell reselection or handover being performed, wherein the replacement indication information indicates replacement of a target base station or a target cell corresponding to the relay UE. or indicates termination of handover for a remote UE; and transmitting, by the relay UE. the replacement indication information to the remote UE.

This application discloses a handover method and apparatus, a terminal device, and a network device. The handover method includes: receiving a first message sent by a source cell, where the first message is used to instruct a relay terminal to hand over to a target cell, the first message carries target configuration information of the target cell, and the target configuration information includes first configuration information of the relay terminal and second configuration information of data of a remote terminal on a Uu interface, where the remote terminal is a remote terminal of the relay terminal; and accessing the target cell according to the target configuration information.

Embodiments of this application provide a communication path switching method, an apparatus, and a system. The method includes: A first terminal receives a first radio resource control (RRC) connection reconfiguration message sent by a first network device, the first RRC connection reconfiguration message comprises a first identifier, a second identifier, and first indication information, the first identifier identifies the first terminal, the first indication information indicates the first terminal to perform communication path switching, the second identifier identifies a second terminal, and the second terminal is a target terminal for the communication path switching; and the first terminal sends a first message to the second terminal, the first message comprises the first identifier.

The communication method includes the following. A first terminal device receives first information from a first network device, where the first information indicates that the first terminal device is to hand over to a second network device. The first terminal device transmits second information to a second terminal device, where the second information indicates that the second terminal device is to hand over to the second network device, and the first terminal device provides relay service to the second terminal device.

The present disclosure provides a communication method. The method includes: performing handover of a relay device and a terminal device from a first access network device to a second access network device, and receiving, by the relay device, a data packet sent by the terminal device, where the data packet includes first identification information, and the first identification information is used to identify sending the data packet to the second access network device; and sending, by the relay device, the data packet to the second access network device based on the first identification information.

Aspects of the present disclosure provide techniques for configuring and triggering conditional handover for UE mobility between a direct connection to the base station (Uu connection) and/or a relay connection (PC5 connection). Specifically, the conditional handover configuration may include preparing multiple candidate relay UEs for handover (e.g., from Uu connection to PC5 connection) and conditional handover execution criteria for relay selection (or reselection) for the UE. Similarly, features of the present disclosure provide techniques for conditional handover transition from a PC5 connection back to Uu connection when conditional handover execution criteria are met (e.g., sidelink signal strength between the two UEs falls below a channel condition threshold). Additionally, the techniques provided herein support for conditional handover of the relay UEs from a first base station to a second station while the relay UE is further supporting one or more remote UEs.

A communication method and an apparatus. The method includes: acquiring, by a relay device, handover conditions of a plurality of preset cells from a first cell, where for any cell i among the plurality of preset cells, a handover condition of the cell i is a handover condition for the relay device to perform handover from the first cell to the cell i; establishing, by the relay device, a connection with a second cell when the relay device meets a handover condition of the second cell, where the second cell is any one of the plurality of preset cells; sending, by the relay device, first indication information to a terminal device, where the first indication information indicates that the relay device establishes the connection with the second cell.

In an embodiment a connection method includes obtaining, by an access network device, connection mode preference information of a first terminal device, wherein the connection mode preference information indicates a connection mode preference of the first terminal device and sending, by the access network device, path switching information to the first terminal device based on the connection mode preference information, wherein the path switching information is used to switch a connection mode between the first terminal device and the access network device.

One embodiment is a method for operating a relay user equipment (UE) related to sidelink relay in a wireless communication system, the method comprising: a relay UE establishing a connection with a remote UE; the relay UE transmitting or receiving a packet related to the remote UE to/from a base station; and the relay UE declaring a radio link failure (RLF), wherein the RLF is related to a Uu link, and the relay UE transmits a message notifying of the RLF to the remote UE, the message being related to a relay reselection trigger.

The present disclosure relates to mobility in a wireless communication system. According to an embodiment of the present disclosure, a method performed by a first wireless apparatus in a wireless communication system comprises the steps of: transmitting information about the first wireless apparatus to a network; after transmitting the information about the first wireless apparatus to the network, receiving, from the network, information about a selection mode indicating whether another wireless apparatus that is to establish a connection with the first wireless apparatus is selected by the network or selected by the first wireless apparatus: identifying a second wireless apparatus determined on the basis of the selection mode; and establishing a connection with the second wireless apparatus.