Node-Disjoint Multipath Routing with Group Mobility in MANETs

Group mobility is quite usual in many realistic mobile and wireless environments, but it is rarely adopted in multipath routing. We propose a Group mobility-based Multipath Routing protocol (GMR) for large and dense mobile ad-hoc networks (MANETs). The GMR protocol adapts intra-group routing and inter-group routing to handle group mobility. The routing table maintained by a group leader is used to discover routes in intra-group routing, while the reactive routing, with the zoning method, is used to discover multiple node-disjoint paths in inter-group routing. The purpose of the zoning method is to ensure that a path is mapped to a separate zone, so that nodes are disjointed in multiple paths. Performance analysis and simulation results show that the proposed protocol provides satisfactory routing performance in large and dense networks with group mobility patterns.