Active cooperation-aware spectrum resource allocation in cognitive radio network

Dynamic spectrum access technology can effectively improve the spectrum utilization and solve the problem of the lack of spectrum resources in cognitive radio network. The introduction of cooperative communication will significantly improve the performance of the communication system. This paper presents a new collaborative incentive strategies in Cooperative Cognitive Radio Network (CCRN). Specific to nodes´ selfish nature, using stackelberg leader-follower game model, we reserch the spectrum allocation mechanism, where the primary user, aware the exist of second users, dynamically leasing part of the spectrum to the cognitive users, in order to stimulate them to actively join the primary user cooperative transmission. Thus the primary user communication performance is improved, and get some additional income in the same time. In return, the primary user leases portion of spectrum access width to the selected secondary users for their own transmission. The backward induction method is applied to analysis and prove the existence and uniqueness of the stackelberg equilibrium solution in the proposed stackelberg leader-follower game model. Both analytical result and numerical result show that the proposed cooperative cognitive radio framework is promising under which the utility of both primary and secondary system are maximized.