HANDOFF METHOD BETWEEN DIFFERENT KINDS OF NETWORKS, AND ITS SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a method and system for performing handoff between a source system and a target system.

SOLUTION: A target system has a different network access standard from that of a source system. A mobile terminal connected to the source system transmits a request message through the source system to the target system in order to perform access to the target system. A session storage part of the target system acquires the identifier of the mobile terminal from the mobile terminal through the source system, and acquires the session information of the mobile terminal from the old session storage part to which the mobile terminal has been connected before it accesses the sources system by using the acquired identifier. After the session information is acquired, the gateway of the target system acquires context information from the gateway of the source system. After the handoff of the mobile terminal, the target system provides the data service to the mobile terminal.

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