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REPLICATION SCHEMES AND CONTENT CACHING DESIGN ISSUES FOR P2P FILE SHARING IN WIRELESS MESH NETWORKS

Néelima Guntupalli, R.Madhuri Devi, P.D.Ratna Raju

Wireless Mesh Networks (WMNs) is a new low cost communication paradigm being widely deployed all around the world. Multiple nodes coordinate with one another to cache data and share the cached data. Cached data not only replies local access, but also replies data request issued from other nodes. They have emerged as an important technology in building next generation fixed wireless broadband networks that provide low cost Internet access for fixed and mobile users and reduce the number of hops that request/data need to travel in the network. On the other hand, peer-to-peer (P2P) applications are a more mature technology. P2P applications are responsible for a big part of the Internet traffic. Thus, it is of great importance to study how P2P applications perform inside WMNs, and the possible drawbacks and propose solutions. An orthogonal evolution in computer networking has been the rise of Peer-to-Peer (P2P) applications such as P2P file sharing. It is of interest to enable effective P2P file sharing in this type of networks. . Finally, we compare the performance of our proposed schemes against other existing schemes using simulations. We focus on P2P file sharing but other applications can also be supported by the proposed schemes. Our main contribution in this paper is innovative schemes for content caching and replication at mesh routers that enhance the performance of P2P file sharing in WMNs. We first motivate our proposed schemes by showing the impact of caching P2P content at mesh routers on the performance of P2P file sharing in WMNs. We then describe the design and operation of our content caching and replication schemes.