| 摘要 |
A method and system for performing handoff between a source system and a target system are provided. The target system has a different network access standard from that of the source system. An access terminal, connected to the source system, transmits a request message including an identifier of the access terminal to be identified in the target system, to the target system, via the source system, in order to access the target system. A session storage of the target system acquires the identifier of the access terminal from the access terminal via the source system. The session storage of the target system acquires session information of the access terminal from an old session storage to which the access terminal was connected before it accesses the source system, using the acquired identifier. After the session information is acquired, a gateway of the target system acquires context information related to a data service of the access terminal from a gateway of the source system. After handoff of the access terminal, the target system provides the data service to the access terminal using the session information and the data service-related information.
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