Dynamic Bargaining for Relay-Based Cooperative Spectrum Sharing

Cooperative spectrum sharing can effectively improve the spectrum usage by allowing Secondary Users (SUs) to dynamically and opportunistically share the licensed bands with Primary Users (PUs). In return, an SU will relay a PU's traffic to improve the PU's effective data rate. In this paper, the authors study how one PU and one SU achieve an efficient spectrum sharing through dynamic non-cooperative bargaining. The key challenge is that the PU does not have complete information of the SU's energy cost. They model the dynamic bargaining with incomplete information as a dynamic Bayesian game, and investigate the equilibria under both single-slot and multi-slot bargaining models.