A Mobility Management Scheme with QoS Support for Heterogeneous Multihomed Mobile Nodes

In this paper, we propose a mobility management scheme with quality-of-service(QoS) support for heterogeneous multihomed mobile node. With this scheme, the multihomed mobile node can move between networks seamlessly and at the same time, utilize all available links based on the QoS requirement. Session initiation protocol(SIP)[l] is used in session management and each multihomed node is identified by a unique SIP uniform resource identifier(URI). This mobility scheme supports both horizontal and vertical handover and no triangular routing is involved. Depending on the QoS requirement, each data flow can either be allocated to one of the links or distributed across multiple links. The ability to distribute data at packet level across multiple links is unique compared to many approaches using flow level distribution. The proposed scheme not only effectively increases the throughput and reduces the delay, but also alleviates out-of-sequence packet problem where certain applications are sensitive to.