Bandwidth exchange: an energy conserving incentive mechanism for cooperation

Cooperative forwarding in wireless networks has shown to yield rate and diversity gains, but it incurs energy costs borne by the cooperating nodes. In this paper we consider an incentive mechanism called Bandwidth Exchange (BE) where the nodes flexibly exchange the transmission bandwidth as a means of providing incentive for forwarding data, without increasing either the total bandwidth required or the total transmit power. The advent of cognitive radios and multicarrier systems such as Orthogonal Frequency Division Multiple Access (OFDMA) with the ability to flexibly delegate and employ a number of subcarriers makes this approach particularly appealing compared incentive mechanisms that are often based on abstract notions of credit and shared understanding of worth. We consider a -node wireless network over a fading channel and use a Nash Bargaining Solution (NBS) mechanism to study the benefits of BE in terms of rate and coverage gains. We also propose two heuristic algorithms based ...

• Type: Journal
• Year: 2010
• Where: TWC
• Authors: Dan Zhang, Ryoichi Shinkuma, Narayan B. Mandayam
• Keywords: Artificial Intelligence, Bandwidth Exchange, Incentive Mechanisms, TWC 2010, Wireless Network