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首页> 外文期刊>IEEE transactions on mobile computing >Spectrum Sharing through Contracts for Cognitive Radios
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Spectrum Sharing through Contracts for Cognitive Radios

机译：通过认知无线电合同进行频谱共享

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Development of dynamic spectrum access and allocation techniques recently have made feasible the vision of cognitive radio systems. However, a fundamental question arises: Why would licensed primary users of a spectrum band allow secondary users to share the band and degrade performance for them? And how can we design incentive schemes to enable spectrum sharing using cooperative communication schemes? We consider a principal-agent framework, and propose a contracts-based approach. First, a single primary and a single secondary transmitter-receiver pair with a Gaussian interference channel between them are considered. The two users may contract to cooperate in doing successive-interference cancellation. Under full information, we give equilibrium contracts for various channel conditions. These equilibrium contracts yield Pareto-optimal rate allocations when physically possible. We then allow for time-sharing and observe that in equilibrium contracts there is no actual time-sharing. We show that the designed contracts can be made robust to deviation by either user post-contract. We also show how these can be extended to multiple secondary users. We show that under hidden information, when the primary user has a dominant role, neither user has an incentive to lie about their direct channel coefficients, or manipulate the cross channel measurements, and Pareto-optimal outcomes are achieved at equilibrium.
机译：动态频谱访问和分配技术的发展近来已经使认知无线电系统的愿景变得可行。但是，出现了一个基本问题：为什么许可了频段的主要用户允许次要用户共享该频段并降低其性能？以及我们如何设计激励方案以使用合作通信方案实现频谱共享？我们考虑一个委托代理框架，并提出一种基于合同的方法。首先，考虑在它们之间具有高斯干扰信道的单个主要和单个辅助发送器-接收器对。两个用户可以签约合作进行连续干扰消除。在充分了解的情况下，我们给出了各种渠道条件下的均衡合同。在物理上可能的情况下，这些均衡合同产生帕累托最优利率分配。然后，我们允许分时，并观察到均衡合约中没有实际的分时。我们表明，可以通过任一用户的后合同使设计的合同对偏差具有鲁棒性。我们还将展示如何将这些扩展到多个辅助用户。我们显示，在隐藏信息下，当主要用户具有主导作用时，任何用户都没有动机说谎他们的直接渠道系数或操纵跨渠道测量，并且在均衡状态下实现了帕累托最优结果。

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