| A mobile ad-hoc network (MANET) is a multi-hop autonomous system consisting of mobile nodes. It can be built quickly without any fixed infrastructure. Due to the particularity of such network, how to design an efficient routing protocol becomes a hot research topic.We first introduce some basic knowledge of MANETs and list some well-known routing protocols, and then we analyze multipath routing. This thesis proposes a Multiple Zones-based routing protocol (M-Zone) in large-scale MANETs. The M-Zone protocol makes full use of geographic location to divide multiple zones, and each path is mapped to a distinct zone. Thus intermediate nodes in multiple paths are node-disjoint except for source and destination. The M-Zone protocol can scale well to large-scale MANETs where nodes are distributed randomly and uniformly. We improve this protocol by borrowing the idea of deploying reliable nodes in order to be adaptive to more general network with sparse areas.This thesis proposes a Group mobility-based Multipath Routing protocol (GMR), the GMR protocol adopts intra-group routing and inter-group routing according to the features of group mobility. The two ways adapt to group mobility model very well.M-Zone and GMR are protocols using the zoning method to discover node-disjoint multipath routing, and they adapt to different network environments by using different mechanisms. Routing survivability is enhanced and load balancing of network is improved by using the above multipath routing. Hence, M-Zone and GMR achieve good performance in large-scale MANETs with high node density. |
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