Cooperative caching in wireless multimedia sensor networks
Mobile Networks and Applications
Efficient cooperative caching schemes for data access in mobile ad hoc networks
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
Cooperative Caching in Mobile Ad Hoc Networks
International Journal of Mobile Computing and Multimedia Communications
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Caching is a key technique for improving data retrievalperformance of mobile clients in mobile environments. Theemergence of robust and reliable peer-to-peer (P2P) technologiesnow brings to reality what we call "cooperativecaching" in which mobile clients can access data items fromthe cache in their neighboring peers. This paper considersa COoperative CAching scheme for mobile systems, calledCOCA. A cache signature scheme is devised for COCA thatprovides hints for the mobile clients to determine whethera required data item is cached by their neighboring peersbased on their local state. The trade-off between the improvementin system performance and the overheads of thecache signature scheme in COCA is discussed. The performanceof COCA with and without the cache signaturescheme is evaluated through a number of simulated experiments.COCA is shown to be capable of effectively reducingthe number of server requests and power consumption,as well as shortening the access latency as the number ofneighboring peers increases. The inclusion of cache signaturescheme further improves on the access latency.