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ThinkMind // International Journal On Advances in Networks and Services, volume 6, numbers 1 and 2, 2013 // View article netser_v6_n12_2013_6


A Study of the Performance of Cooperative Caching in Static Ad Hoc Networks

Authors:
Francisco Javier González-Cañete
Eduardo Casilari

Keywords: cooperative caching; grid; ad hoc network; redirection cache

Abstract:
In this paper, we evaluate the performance of the CLIR (Cross-Layer Interception and Redirection) cooperative caching scheme for ad hoc networks in static grid ad hoc networks. This caching scheme implements a local cache in every node of the network allowing the nodes to work as request interceptors for the rest of the nodes. In addition, it also implements a redirection cache that stores information about the location of the documents in the network in order to redirect the requests to nodes that are situated closer than the servers. Finally, a piggy-backing technique is incorporated to the routing protocol with the aim of finding the documents in the network while the routes to the servers are created. By means of simulations, we evaluate the mean traffic generated in the wireless network, the delay perceived by the users, the percentage of failed searches, the mean number of retrieved documents, the local and remote cache hits and the mean percentage of redirection hits as a function of the mean time between requests, the Time To Live (TTL) of the documents, the traffic pattern and the cache sizes. We compare the performance of our proposal with another five cooperative caching schemes as well as the option of no using a caching scheme. The simulation results show that our proposal outperforms the other caching schemes in terms of the studied parameters. In addition, we compare the redirection caching scheme of our proposal to the redirection policies implemented by other caching schemes.

Pages: 68 to 79

Copyright: Copyright (c) to authors, 2013. Used with permission.

Publication date: June 30, 2013

Published in: journal

ISSN: 1942-2644

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