METHOD AND SYSTEM FOR RECOVERING COMMUNICATION STATE AFTER SGW FAILURE, AND MME AND SGW

摘要

Provided are a method and a system for recovering a communication state for a Serving Gateway (SGW) failure, a Mobility Management Entity (MME) and an SGW. The method includes that: an MME acquires that an SGW fails and a user is in a lost state; and the MME sends a session creation request message to a standby SGW to update session context information in a Packet Data Network Gateway (PGW) through the standby SGW.