一种联盟博弈频谱感知机制

Coalitional Game Spectrum Sensing Scheme

为了在主用户具有异构性且认知用户处于多路径衰减、阴影效应等低感知性能的认知环境中,使认知用户公平有效地进行频谱感知,提出一种联盟博弈频谱感知机制,将频谱感知问题建模为效用不可转移的联盟博弈。首先,将认知用户划分成多个子联盟,根据头结点选取原则选出各个子联盟的头结点;其次,根据规则进行子联盟合并或分裂;最后,子联盟头结点利用"OR"规则进行数据融合,得到最终感知结果并广播给子联盟内的所有认知用户。仿真实现和性能评价结果表明,该机制具有好的性能。

To help cognitive users conduct fair and efficient spectrum sensing in the cognitive environment where primary users are heterogeneous and the perceived performances of cognitive users are low due to multipath fading and shadow effect,a coalitional game spectrum sensing scheme was proposed.The spectrum sensing problem was modeled as a coalitional game with nontransferable utilities.Firstly,cognitive users are divided into several sub-coalitions,and each sub-coalition head node is selected according to head node selection principle.Secondly,merging and division of sub-coalitions are taken according to specific rules.Finally,sub-coalition head nodes use＂OR＂rules to do data fusion,and get final sense results and broadcast them to all cognitive users in sub-coalition.Simulated implementation and performance evaluation were done,and the results show that the proposed scheme has good performance.