摘要
针对授权频谱资源不足的问题,结合非对称网络信息的特点和通信双方自私性的需求,提出一种多用户协作频谱共享(CSS)合约机制的设计与实现方法。首先,通过将CSS映射成劳动力市场,研究对称网络信息条件下多用户频谱合约建模方法;在此基础上,针对合约签订后非授权用户(SU)行为隐匿性引起的道德风险问题,研究非对称网络信息条件下频谱合约建模方法,以激励双方协作行为和保证频谱共享的实现。实验结果表明,在授权用户(PU)直接传输速率低于0.2 b/s时,协作频谱共享时整个系统容量是双方不参与共享时的3倍以上。提出的多用户CSS合约机制能为无线频谱的高效利用和资源共享提供新思路。
To alleviate the shortage of licensed spectrum resource, a method to design and implement the multi-user Cooperative Spectrum Sharing (CSS) mechanism was proposed based on the characteristics of asymmetric network information and selfishness of communication users. First, by modeling the CSS as a labor market, a modeling method for the multi-user contract-based CSS framework was investigated under the symmetric network information scenario. Then, to avoid the moral hazard problem due to the hidden-action of Secondary Users (SUs) after contract assignment, a contract-based CSS model was proposed to incentivize the contribution of SUs for ensuring spectrum sharing. The experimental results show that, when the direct transmission rate of Primary User (PU) is less than O. 2 b/s, in comparison with the case of non-cooperative spectrum sharing, the capacity of network is more than 3 times larger. The proposed multi-user contract-based CSS framework will put forward new ideas for efficient sharing and utilization of spectrum resource.
出处
《计算机应用》
CSCD
北大核心
2015年第7期1805-1808,1819,共5页
journal of Computer Applications
基金
湖北省自然科学基金资助项目(2015CFB646
2014CFB589)
太阳能高效利用湖北省协同创新中心开放基金资助项目(HBSKFMS2014033)
湖北工业大学博士科研启动基金资助项目(BSQD13029)
国家自然科学基金资助项目(61471162)
湖北省教育厅重点资助项目(D20141406)
关键词
认知无线电
协作频谱共享
合约设计
非对称网络信息
道德风险
cognitive radio
Cooperative Spectrum Sharing (CSS)
contract design
asymmetric network information
moral hazard