Peer-to-peer caching schemes for integrated wired and wireless network environments

In order to make the unstructured P2P Freenet appropriate for integrated wired and wireless network environments, we propose two kinds of Freenet caching schemes, WDC (Wireless Dependent Caching) and HNS (Half Node Storing), and evaluate their performance through simulation. The performance of WDC is similar to the original Freenet, however it can save bandwidth of the wireless link significantly by replicating files only at wired nodes. With the HNS scheme, although it utilizes more bandwidth than WDC, nodes keep half of the files of the original Freenet, and both the number of hops for success and failure rate decrease. Therefore, the WDC scheme is appropriate for extremely limited wireless link or low proportion of wireless node environments while the HNS scheme can provide a smaller number of hops to success and higher success rate than the original Freenet