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Route caching strategy is important in on-demand routing protocols used in Mobile Adhoc Networks (MANETs). While high routing overhead usually has a significant performance impact in low bandwidth wireless networks, a good route caching strategy can reduce routing overheads by making use of the available route information more efficiently. In this paper, we present the effects of two cache schemes, " link cache " and " path cache " on the performance of on-demand routing protocols through simulations based on the Dynamic Source Routing (DSR) protocol. We have proposed a new simulation environment where the nodes move in random direction with random velocity. This was implemented by modifying the random waypoint model so that the scenario matches to that of the real world. The analysis of the performance of DSR using the link cache has been done in a new simulation environment by using static time out mechanism and a new proposed dynamic timeout mechanism. The effects of different link lifetime values and cache timeout values on the performance of routing protocol in terms of routing overhead and packet delivery ratio are investigated and presented.

Analysis of Performance of DSR Using Different Types of Cache in Dynamic Environment