Patent ID: 7830788
Filing Date: 2010-11-09
Classification: H04L,H04W

Abstract:
1. A mobile communication network system, comprising: a home agent and a mobile anchor point which are nodes each connected to a network, wherein each of the nodes receives a position registration from a mobile terminal, creates a backup binding cache by copying the binding cache, and maintains and manages the backup binding cache; and the home agent searches the backup binding cache in the event of fault recovery and acquires a binding cache that has been held prior to the fault, designates a pre-registered multicast address for the mobile terminal stored in the acquired binding cache and sends a position registration request packet to the pre-registered multicast address of the mobile terminal, renders the acquired binding cache valid when there is a response from the mobile terminal with respect to the position registration request packet sent to the pre-registered multicast address and continues to maintain and manage the acquired binding cache, and when there is no response from the mobile terminal to the position registration request packet sent to the multicast address, the home agent sends the position registration request packet to a unicast address of the mobile terminal, and, when there is no response from the mobile terminal to the position registration request sent to the unicast address, renders the acquired binding cache invalid and deletes the acquired binding cache.