Switching method, equipment and system

摘要: Provided are a switching method, equipment and system, which can still switch to corresponding network slice after terminal is switched from source default mobility management element in target network. The method comprises the following steps: receives first indication information networkelement context of terminal, wherein used for indicating that current registration process occurs connected state; or stored element; does not need be acquired according globally unique temporary identifier GUTI terminal; sends completionnotification completed information, completion notification notifying no longer valid already registered element.