Selective spectrum leasing in Internet of Things via Nash Bargaining Solutions

In the Internet of Things, spectrum leasing is a win-win solution for both notes which need to communicate by wireless but have no licensed bandwidth, i.e., secondary users (SUs), and nodes which own the under-utilized licensed bandwidth, i.e., primary users (PUs). In this paper, we consider a scenario where a PU would like to share a fraction of its bandwidth to only one of the SUs in exchange for cooperative transmission when the PU´s transmission rate is lower than the quality of service requirement. We cast such resource sharing problem in the framework of cooperative game, and use the Nash Bargaining Solution (NBS) and selective cooperation to achieve the optimal strategy. Analysis and numerical results show that spectrum leasing based on cooperative games is a promising paradigm.