Stability-Based Segment-by-Segment Routing Protocol In Large-Scale MANETs

Mobile Ad-hoc NETworks (MANETs) are a kind of wireless self-organizing networks that depend on no infrastructure. They are typically characterized by its multi-hop, no-center, self-organization and mobility. Such convenience and fast to built, and unrestricted by the time and space, these networks can be applied in emergency rescue, battle field, explorations and objects monitoring of long distance or dangerous environments.Routing is the key technique of MANETs and one of the most important factors affecting the performance of the network. As the dynamic and variable topology, it is very challenging to find a stable route in MANETs. The thesis mainly focuses on the stable routing based on segment-by segment routing protocol in MANETs.This thesis proposes a stability-based segment-by-segment routing protocol using neighbor change ratio in large-scale MANETs, where each node maintains a two K-hops square vicinity. Within the zone it establishes a stable vicinity routing table based on neighbor change ratio, between the zones it chooses stable anchors to build a stable route segment by segment. The protocol can decrease path break times and increase packet delivery ratio.This thesis also proposes a link lifetime-based stable segment-by-segment routing protocol in MANETs, where each node maintains a K-hops vicinity. Within the zone it establishes a long lifetime stable vicinity routing table. Between the zones it chooses stable anchors to build a long lifetime route. The protocol can improve performance and efficiency of packet delivery.The simulation results show that the proposed protocols can get good performance in large scale MANETs.