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One of the big challenges in ad hoc network design is packet routing. Studieshave shown that on-demand routing protocols perform better than table-drivenrouting protocols. In order to avoid route discovery for each packet, on-demandrouting protocols cache routes previously learnt. A node in ad hoc networklearns routing information by overhearing or forwarding packets to other nodesand keep learned routes in its route cache. However, node movement resultsbroken links and therefore increases risk of cache pollution. Ensuring cachefreshness in on-demand routing protocols, therefore, presents a seriouschallenge. A lot of research has been done in route cache organization,however, little effort has been done for route cache timeout policy to preventstale routes from being used. In this paper we propose a new cross-layerframework to improve route cache performance in on-demand routing protocols.The proposed framework presents novel use of Received Signal Strength Indicator(RSSI) information to choose cache timeout of individual links in route cache.Comment: This paper has been withdrawn as it's available as part of IEEE CCNC  2007 proceedings from IEEExplor

Ensuring Cache Freshness in On-Demand Routing Protocols for Mobile Ad Hoc Network: A Cross-layer Framework