Handover control method, admission control method, and communication apparatus

Abstract

This application provides a handover control method, an admission control method, and a communication apparatus. A first access network device obtains mapping information between an access network slice instance of a second access network device and a network slice; the first access network device determines, based on the mapping information, that the second access network device supports a first network slice associated with a service currently performed by a terminal device; and the first access network device sends first request information to the second access network device, where the first request information is used to request to enable the terminal device to access the second access network device, and then the second access network device performs admission control. In this technical solution, continuity of a network slice service can be ensured when the terminal device performs handover between access network devices, and impact on a core network can be reduced.