Trading off efficiency and reciprocity in wireless peer-to-peer file sharing

This paper considers the problem of allocating exchange rates in peer-to-peer dissemination, which must consider the dual objectives of throughput efficiency and reciprocity between peers, the latter essential to cooperation incentives. This question has been studied in prior research for wired networks under an upload constraint, where the focus is on achieving reciprocity through decentralized peer interactions. We consider here a wireless network substrate, for which link capacities are non-uniform according to the peering choice, and exchanges may be subject to interference. A convex optimization problem is formulated that trades off efficiency and reciprocity, and various schemes are investigated to achieve a decentralized solution.