Routing Technologies In Wireless Sensor Networks And Vehicular Ad-hoc Networks

Wireless ad-hoc network is a multi-hop self-organizing system composed of a group of nodes with wireless transceivers, which have attracted so many researchers and institutes these years. Many new routing protocols have been specifically designed according to different application and network structure. In recent years, several new research branches of ad-hoc network have appeared. The thesis discusses some routing protocols in the fields of wireless sensor network and vehicular ad-hoc networks.Firstly, the thesis makes classification and comparison on routing protocols in both wireless sensor networks and vehicular ad-hoc networks. This work helps us to design and improve the routing protocols.In contrast to single-source single-destination unicast schemes, group communication schemes become more popular in WSN applications. According to the features and application demands, the thesis proposes LDMRP, a distributed, light-weight multicast protocol for Wireless Sensor Networks. Based on the shortest-path algorithm, LDMRP utilizes the shared sub-paths between the source and each receiver to construct a multicast group so as to reduce the redundant messaging and increase the bandwidth efficiency as well as the energy efficiency. The simulation results prove that LDMRP performs better than those on-demand multicast protocols for Ad Hoc network which is also workable for WSN.Based on the service mode and locomotion characteristic of vehicular ad-hoc network, also we proposed a service-orient distributed routing protocol. It builds route by reusing paths which have already detected by previous service discovery, and effectively integrates service discovery and routing establishment process. As well, we do use the distributed routing maintenance mechanism that nodes along the established route try to maintain the the integrality and validity of local links to insure the success of entire routing. And in order to solve the partition problem, store-to-retransmit scheme is proposed. In the last part, we examinate the feasibility and validity of our routing protocol by simulations.