Handover method, base station, and terminal device

A base station, comprising:

• a transceiver;
• a memory storing instructions;
• and
• a processor coupled to the memory and the transceiver, the processor executing the instructions to perform:
• receiving, using the transceiver, a handover request from a source base station, the handover request comprising a service type of a terminal device and quality of service (QoS) information of the terminal device, the service type of the terminal device corresponding to a network slice, the service type comprising an ultra-low latency service, ultra-reliable service, or massive connectivity service;
• performing an admission control in response to receiving the handover request, the admission control being performed based on the service type of the terminal and at least one service type supported by the target base station, the at least one service type supported by the target base station includes the service type of the terminal;
• instructing the transceiver to send a handover response to the source base station, the handover response comprising information for performing a handover, the handover response comprising information about a cell-radio network temporary identifier of the terminal device in the base station;
• and
• instructing the transceiver to send a path switch request message to a gateway.

A communication system, comprising:

• a source base station;
• and
• a target base station;
• the source base station is configured to:
• send a handover request to the target base station, the handover request comprising information about a service a service type of a terminal device and quality of service (QoS) information of the terminal device, the service type of the terminal device corresponding to a network slice, the service type comprising an ultra-low latency service, ultra-reliable service, or massive connectivity service;
• and
• the target base station is configured to:
• perform an admission control in response to receiving the handover request, the admission control being performed based on the information about the service type of the terminal and at least one service type supported by the target base station, the at least one service type supported by the target base station including the service type of the terminal;
• and
• send a handover response to the source base station, the handover response comprising information for performing a handover, the handover response comprising information of a cell-radio network temporary identifier of the terminal device in the target base station;
• and
• send a path switch request message to a gateway.