Research On MANET And DTN Hybrid Routing Protocol Based On Link Sensing

This paper has put forward the hybrid routing protocol of MANET(Mobile Ad Hoc Network) and DTN (Delay Tolerant Network) , which is based on link sensing of the network, especially suits in the outdoor scene such as disaster relief, field survival, geological exploration and other outdoor communication network. This scheme provides an important supplementary communication except for the traditional communication infrastructure. For the mainly part of the outdoor working are the human beings who are often tend to show the certain regularity and periodicity,therefore, the nodes from the ad hoc network will have a corresponding regularity and periodicity.This perception link is a regular division of the regional link routing algorithm based on mobile node characteristics, based on the link based environment, this paper proposes hybrid routing strategy based on the node network model, including MOD (MANET over DTN) model and DOM(DTN over MANET) model. For the entire network, the node is composed of MOD model, while the local area is relatively small, such as: the main personnel collaborative outdoor work to accomplish a task at that time the network is composed of DOM network model between them.In the link sensing algorithm, network link connectivity degeneration changes a serious impact on the network routing establishment, this paper proposes one dynamic sensing algorithm accord to the remaining energy of nodes, moving speed, acceleration, density and other parameters to distinguish the different link of the whole network. According to the link status of the different areas, region links are divided into different parts in the priority manner, which provides an important reference to help to establish the routing protocol. The algorithm has the higher efficiency and higher accurate rate when compared with the traditional model. This algorithm is cited to eliminate the negative effect of route confusion, which is caused by the mobility.After the general link model of the link sensing algorithm is determined, this paper presents a hybrid routing scheme of MANET and DTN, using the free DTN nodes communicate the fragmented network together, then establish communication links with the DTN nodes to meet higher probability of completion, in addition, the number of average success transmission is quoted to guarantee the steady transmission link between the nodes and routing information of local area topology obtained in this paper in a table driven manner is cited to make sure the normal operation of communication network. This hybrid routing protocol network can improve delivery success rate of routing algorithm, and reduce network delay significantly as well. Finally, through the simulation analysis, the conclusion is illustrated that the hybrid routing scheme proposed in this paper significantly improves the performance of the network.