Fast Handover Algorithms for Multihomed and Nested Network Mobility
Link failure tolerant is a crucial issue for multihomed and nested mobile networks. Existing solutions are however not satisfactory. In this paper,a thorough analysis on the problems of multihomed and nested mobile networks is made and the existing schemes in the eye of failure tolerant are reviewed first. Then an access router tree model with three handover algorithms are proposed to enhance the robustness of system by providing fast handover among all available access routers,so ongoing sessions may survive when any access failure bursts. The algorithms gain advantages as follows:(1) the handover delay is reduced significantly; (2) the data efficiency of packet is raised remarkably; (3) resulting from lightweight processes and previous-protocols compatibility,it is easy to be implemented in practice. Extensive simulations are performed to evaluate the proposed scheme. Results indicate that link failure tolerant can be achieved with least latency of packet transmission compared with its existing counterparts.