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In this paper, we propose a cooperative caching scheme for structured data via clusters based on peer connectivity in mobile P2P networks. In the proposed scheme, a cluster is organized for cache sharing among mobile peers with long-term connectivity, and metadata are disseminated to neighbor peers for efficient data search performance. It reduces data duplication and uses cache space efficiently through integrative cache management of peers inside the cluster. The proposed scheme reduces data replacement time in the event of changes in topology or cache data replacement using the concept of temp cache. It performs data recovery and cluster adjustment through cluster management in the event of an abrupt disconnection of a peer. In the scheme, metadata of popular data are disseminated to neighbor peers for efficient data searching. In a data search, queries are processed in the order of local cache, metadata, the cluster to which it belongs, and neighbor clusters, in accordance with cooperative caching strategy. Performance evaluation results show that the proposed scheme has a higher cache hit ratio, and lower cost for data replacement and query processing than existing schemes.
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- Cooperative Caching for Efficient Data Search in Mobile P2P Networks
- Springer US