Service node updating method, terminal device, and network-side device

A service node updating method, performed by a network-side device, wherein the network-side device comprises a source node in a service node updating procedure, and the method comprises:

• sending configuration information, wherein the configuration information comprises first connectivity configuration information used to maintain both a connection to the source node and a connection to a target node in the service node updating procedure and second connectivity configuration information used to release the connection to the source node and connect to the target node;
• wherein the first connectivity configuration information is used for a terminal device, when applying the first connectivity configuration information, to process a layer 2 protocol entity corresponding to a bearer between the terminal device and the source node, to reconfigure the bearer as a source node split bearer;
• wherein the terminal device, when applying the first connectivity configuration information, processing the layer 2 protocol entity corresponding to the bearer between the terminal device and the source node, comprises:
• reconfiguring a Packet Data Convergence Protocol (PDCP) entity of the bearer in a source node cell group of the source node;
• keeping a radio link control (RLC) entity of the bearer in the source node cell group unchanged;
• keeping a medium access control (MAC) entity of the bearer in the source node cell group unchanged;
• establishing an RLC entity of the bearer in a target node cell group of the target node;
• and
• establishing a MAC entity of the bearer in the target node cell group.

A terminal device, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, the processor is configured to implement:

• receiving configuration information, wherein the configuration information comprises first connectivity configuration information used to maintain both a connection to a source node and a connection to a target node in a service node updating procedure and second connectivity configuration information used to release the connection to the source node and connect to the target node;
• processing, by applying the first connectivity configuration information, a layer 2 protocol entity corresponding to a bearer between the terminal device and the source node, to reconfigure the bearer as a source node split bearer;
• and
• processing, by applying the second connectivity configuration information, a layer 2 protocol entity corresponding to the bearer, to reconfigure the source node split bearer as a target node bearer;
• wherein when the computer program is executed by the processor, the processor is further configured to implement:
• reconfiguring a Packet Data Convergence Protocol (PDCP) entity of the bearer in a source node cell group of the source node;
• keeping a radio link control (RLC) entity of the bearer in the source node cell group unchanged;
• keeping a medium access control (MAC) entity of the bearer in the source node cell group unchanged;
• establishing an RLC entity of the bearer in a target node cell group of the target node;
• and
• establishing a MAC entity of the bearer in the target node cell group.