Method and apparatus for switching between source path and target path using relay

A method for wireless communication, comprising:

• sending, by a source network device, a switching command to first User Equipment (UE), wherein the switching command is used for indicating the first UE to switch from a source path to a target path, the source path is a path between the first UE and the source network device, the target path is a path between the first UE and a target network device, at least one of the source path or the target path is a relay path, and the switching command is further used for triggering the first UE to start performing at least one of sending uplink data or receiving downlink data on the target path,
• wherein the switching command is used for triggering a Packet Data Convergence Protocol (PDCP) entity of the first UE to perform a first target operation, and the first target operation comprises at least one of:
• PDCP reconstruction;
• PDCP data restoration;
• PDCP reconfiguration;
• or
• switching a transmission path of PDCP data from the source path to the target path.

A device for wireless communication, the device being first User Equipment (UE) and comprising:

• a transceiver, configured to:
• receive, from a source network device, a switching command for indicating the first UE to switch from a source path to a target path, wherein the source path is a path between the first UE and the source network device, the target path is a path between the first UE and a target network device, and at least one of the source path or the target path is a relay path;
• and
• a processor, configured to:
• start performing at least one of sending uplink data or receiving downlink data on the target path in response to being triggered by the switching command or a first message, wherein the first message is sent from second UE to the first UE, and the second UE is relay UE on the relay path,
• wherein the second UE is relay UE on the target path, and the first message indicates at least one event of following:
• connection configuration between the second UE and the target network device is completed;
• or connection configuration between the second UE and the first UE is completed.