JELE_V2_N2_RP4 Yogendra Gandole Journal on Electronics Engineering 2249 – 0760 2 2 23 35 Cognitive Network, Quality of Service Routing, Rerouting, Cognitive Behavior The cognitive behavior based on the cognitive science model for the network nodes to benefit the Quality of Service rerouting is designed. A Quality of Service rerouting protocol oriented to cognitive network is proposed. Rerouting is a distributed protocol where the route search is in a hop by hop way. Inspired by the small-world phenomenon, the experiential route information is collected and stored at each node to benefit the future route selection. We implement and evaluate Quality of Service rerouting in NS2 platform. Its performance is compared with another two popular routing protocols. The results show that Cognitive Rerouting has achieved remarkable performance improvements over the protocols where no cognitive behaviours are exploited. December 2011 - February 2012 Copyright © 2012 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=1624