| 摘要 |
A method for handover between different types of access systems in an embodiment of the present invention includes: when the UE hands over between different types of access systems, the UE accesses the IASA connected with the UE in the source access system through the destination access system. Furthermore, the present invention discloses a handover system, and a UE that includes an IASA address storing module and an IASA address sending module. The handover system includes: a UE, a destination access system, and a source IASA. The present invention does not require searching for the IASA, HA or VPN GW through a DNS resolution process in the destination access system, and reduces the UE handover time. Moreover, the present invention ensures to keep consistency of the service anchor between the source access system and the destination access system for the UE. Therefore, the UE may use the same IP address to interact with the external network, thus reducing service interruption and ensuring service continuity.
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