METHOD FOR UTILIZING THE SAME IP ADDRESS WHEN CHANGING FROM ONE SERVICE AREA INTO ANOTHER IN A MPLS BASED WIRELESS COMMUNICATION SYSTEM

摘要

A method is provided for ensuring mobility to a mobile host in a wireless network with multi protocol label switching deployed in the packet switched core network. A Mobile Host has a packet switched connection via a bidirectional Multi-Protocol Label Switching data tunnel from a first ingress node of the core network serving the service area of a radio access network domain, where the Mobile Host is currently located, to an egress node of the core network. When the mobile host moves to a service area of a second radio access network domain, the node of attachment serving the second radio access network domain is informed about the Internet Protocol address of the egress node of the existing data tunnel together with respective LSP tunnel parameters and sets up a new bidirectional Multi-­Protocol Label Switching tunnel to the egress node specified by the Internet Protocol Address. During this handover, the Mobile Host does not change its own Internet Protocol address.