Design And Performance Analysis Of On-Demand Routing Protocol For Ad Hoc Networks

Ad hoc is a wireless multi-hop network, temporary and center-free network composed of mobile terminals carrying radio sending and receiving set. It can be built up without the support of any existent network infrastructure at any place anywhere. Each node is equal and can move freely with minimal configuration, absence of infrastructure and quick deployment. Its characteristics make it convenient in emergency situations, especially military scenarios and civilian applications. Therefore, Ad hoc has been widely concerned by more and more telecom researchers. Because of the effect of node mobility, network topology change and limit of single terminal, routing topic has been focused on by many researchers today.Although current on-demand routing protocols help a lot to resist the interference by node mobility, there still exist some problems. In this paper, we compare two typical on-demand routing protocols in their performance and draw out the relative merits of these two. Furthermore, we put forward a new on-demand routing protocol——PSROR(Path Stability Rate based On-demand Routing).PSROR is composed of five modules: message communication and maintenance module, local routing break recover module, short path notification module, stable path change module and load balance module. We give the performance evaluation under random waypoint model. The simulation results show that PSROR increase packet delivery ratio, decrease the path recovery time and end-to-end transmission jitter, which is valuable for those time-sensitive applications.PSROR is a brand new routing protocol for Ad hoc networks. Not only does it solve the inefficiency of current Ad hoc routing protocol, like low packet delivery ratio and high routing load, but also maintain the advantage of on-demand routing.