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Abstract
Route caching strategy is an important part of any on-demand routing protocols to influence performance of wireless networks. Performance metrics like overhead and delay were found to vary with utilization levels of route cache for protocols like Dynamic Source Routing (DSR) and Highest Energy Routing (HER). Hence variations to these protocols are presented in this paper to improve reliability of service and reduce the effects of cache staleness and network partitions. The variation is with respect to identification of route and cache validation of errors using different techniques namely Update Route Caching (URC), Temporal Cache Validation (TCV), Negative Cache Validation (NCV) and combined cache validation (CCV). These techniques refresh cache more often than the DSR and HER thereby initiating route requests earlier, when a route still being used is broken, thus reducing peer-to-peer delay to transmit packets. The results of GloMoSim simulator validates higher cache hit percentage and reliable delivery of packets in the technique Combined Cache Validation (CCV) when in comparison to DSR and HER.
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K Murugan
Murugan K received his BE (Electronics and Communication Engineering) degree in the year 1986 from Government College of Engineering, Tirunelveli and ME (Computer science) degree in the year 1992 from Regional Engineering College, Tiruchirappalli. He is currently working as a Selection Grade Lecturer in Ramanujan Computing Centre, Anna University, Chennai. His current area of research interests are Routing Algorithms, Mobile Ad hoc Networks and Mobile Computing.