FAULT HANDLING METHOD, PACKET DATA NETWORK, MOBILITY MANAGEMENT ENTITY, AND NETWORK SYSTEM.

摘要

Embodiments of the present invention provide a fault handling method, a packet data network, a mobility management entity, and a network system. The fault handling method provided in the embodiment of the present invention comprises: a packet data network gateway (P-GW) receiving downlink data after it is detected that a fault occurs on an associated first S-GW; and the P-GW sending a notification message to a mobility management entity (MME) by means of a second S-GW, the notification message comprising a P-GW identification and a user identification, so that the MME rejects initiating a fault recovery process of the first S-GW when the P-GW identification comprised in the notification message is inconsistent with a P-GW identification corresponding to a context identification of a user. By means of the embodiments of the present invention, execution of a fault recovery process for multiple times can be avoided, thereby reducing signaling load.