PSR: Methodology and Comparative Study along with Different Routing Protocol in Manet?

Mobile ad-hoc network (MANET) is a wireless communication network that contains various mobile devices. These mobile devices form a network with each other without any existing infrastructure or any other kind of fixed stations. It is a self-configuring and self organized network of mobile devices. These devices can move in any direction. The links between these devices will be change frequently, due to their movement. In a dynamic environment of the wireless network, nodes are independent and their mobility causes frequent change of network connectivity. Nodes in such network can act as end points of data transmission as well as routers when the two end points are not in direct range of each other. In a decentralized network, a node is responsible to find the topology information and deliverance of data to the destination. The implementation of appropriate routing protocol is based on the nature of application. MANET continuously maintains the information required to properly route the traffic. MANET is a type of wireless adhoc network that usually has a routable networking In this paper, we propose a lightweight proactive source routing (PSR) protocol to facilitate opportunistic data forwarding in MANETs. In PSR, each node maintains a breadth-first search spanning tree of the network rooted at itself. This information is periodically exchanged among neighboring nodes for updated network topology information. Thus, PSR allows a node to have full-path information to all other nodes in the network, although the communication cost is only linear to the number of the nodes. This allows it to support both source routing and conventional IP forwarding. When doing this, we try to reduce the routing overhead of PSR as much as we can. Our simulation results indicate that PSR has only a fraction of overhead of OLSR, DSDV, and DSR but still offers a similar or better data transportation capability compared with these protocols.