COMMUNICATION METHODS AND, A COMMUNICATIONS APPARATUS, A COMMUNICATIONS SYSTEM, A COMPUTER READABLE STORAGE MEDIUM, AND A COMPUTER PROGRAM PRODUCT

This application discloses a communication method and a communications apparatus. The method provided in this application is applied to a scenario in which a terminal device moves from a first AN node to a second AN node. The method includes: receiving identification information of a to-be-activated session from the terminal device by using the second AN node; sending a context release command to the first AN node when a signaling connection of the terminal device exits between an AMF node and the first AN node; receiving a context release complete message from the first AN node, where the context release complete message carries identification information of an active session of the terminal device; when the to-be-activated session and the active session have a same session, sending a first request message to an SMF node corresponding to the same session, where the first request message is used to request to deactivate the same session; and after the same session is deactivated, sending, to the SMF node, a second request message used to request to activate the same session In this way, a success rate of session activation is improved.