Probability Based Improved Broadcasting for AODV Routing Protocol

Broadcasting is an inevitable operation of route discovery in Mobile Adhoc Network (MANET). Though the broadcast by flooding is simple but inefficient and results in redundant message relays. This in turn over use limited network resources like channel bandwidth and node energy. The alleviated broadcasting with energy saving technique is necessary for the efficient route discovery and to improve network lifetime. In this paper Probability based Broadcasting technique for routing protocol is proposed to trim down flooding problem. It uses node´s current remaining energy strength and threshold random delay to generate rebroadcast probability dynamically for the efficient broadcasting in route discovery. This technique is analyzed over reactive Adhoc On-Demand Distance Vector (AODV) protocol. The route request (RREQ) packet of AODV is modified to gather energy information of nodes. The performance modified protocol is analyzed over broadcast packets sent and End-to-End Delay using ns2 simulator. Simulation results are observed to reduce redundant transmission by 19 to 28 percent and hence improve network performance.