NXG04-6: Novel Hierarchical Network Mobility Support Protocol with Bidirectional End-to-end Route Optimization Solution for Nested Mobile Networks

Providing nested mobile networks with network mobility (NEMO) capabilities is of considerable challenges, because NEMO introduces far more complex mobility scenarios than node mobility. In this paper, a novel NEMO support protocol with hierarchical routing architecture is proposed, which includes both global routing and intra-NEMO routing. Moreover, a generic solution for intra-NEMO routing is introduced, according to which a routing header containing the path information can be constructed for packets to traverse the nested mobile network. The proposed protocol achieves the following advantages: (1) it provides the so-called nested mobility support with bidirectional end-to-end route optimization solution, completely avoiding tunnel in the tunnel problem; (2) the optimization of intra-NEMO routing is addressed; (3) its hierarchical architecture enables localizing the mobility management of local handoff, then lessening disruption to ongoing sessions; and (4) it is compatible with existing protocols, then few modifications to existing entities are required. Performance analysis indicates that our solution can significantly reduce end-to-end packet delay and local handoff delay while keeping the processing and signaling overheads relatively low.