认知无线电中频谱共享的方法。是基于动态频谱租用的，运用了博弈论的原理。-Hierarchical dynamic spectrum access (DSA) has

received the most attention in recent years as the solution for

better spectrum utilization. In this paper, on the other hand,

we develop a framework for dynamic spectrum leasing (DSL).

Power control in hierarchical DSA networks only involves that of

controlling secondary user transmissions. Thus, in game theoretic

formulations of power control in cognitive DSA networks only

secondary users are considered as players of the game. In

proposed dynamic spectrum leasing, on the other hand, the

primary users are rewarded for allowing secondary users to

operate in their licensed spectrum. Thus, in the proposed DSL

networks the primary users have an incentive to allow secondary

users to access the spectrum whenever possible to the maximum

extent. We develop a game theoretic framework for such dynamic

spectrum leasing in which primary users actively participate in

a non-cooperative game with secondary users by selecting an

interfere