Mobile Information Systems

Mobile Information Systems / 2007 / Article

Open Access

Volume 3 |Article ID 193641 |

Narottam Chand, R. C. Joshi, Manoj Misra, "Cooperative Caching in Mobile Ad Hoc Networks Based on Data Utility", Mobile Information Systems, vol. 3, Article ID 193641, 19 pages, 2007.

Cooperative Caching in Mobile Ad Hoc Networks Based on Data Utility

Received26 Mar 2007
Accepted26 Mar 2007


Cooperative caching, which allows sharing and coordination of cached data among clients, is a potential technique to improve the data access performance and availability in mobile ad hoc networks. However, variable data sizes, frequent data updates, limited client resources, insufficient wireless bandwidth and client's mobility make cache management a challenge. In this paper, we propose a utility based cache replacement policy, least utility value (LUV), to improve the data availability and reduce the local cache miss ratio. LUV considers several factors that affect cache performance, namely access probability, distance between the requester and data source/cache, coherency and data size. A cooperative cache management strategy, Zone Cooperative (ZC), is developed that employs LUV as replacement policy. In ZC one-hop neighbors of a client form a cooperation zone since the cost for communication with them is low both in terms of energy consumption and message exchange. Simulation experiments have been conducted to evaluate the performance of LUV based ZC caching strategy. The simulation results show that, LUV replacement policy substantially outperforms the LRU policy.

Copyright © 2007 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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