认知无线网络中基于无休止多臂赌博机模型的多用户频谱接入机制

发布时间：2018-06-07 02:22

本文选题：多用户多信道 + 无休止多臂赌博机模型　；参考：《计算机应用》2014年10期

【摘要】：针对如何协调多个认知用户择机接入多段空闲频域信道的问题,提出了一种基于无休止多臂赌博机(RMAB)模型的动态频谱接入机制。首先,考虑到实际环境下认知用户的信道感知误差,推导出能有效处理感知误差的Whittle索引值算法,该算法通过历史经验积累给予每个信道一定的信任值,并综合考虑在当前信任值下选择每个信道的立即收益与未来收益的多少,选择出需要感知接入的信道;其次,对于多个认知用户接入相同信道时产生冲突的问题,提出了基于多标拍卖的协调机制,通过多标拍卖的方式处理认知用户之间的冲突。仿真结果表明,在相同的环境中,所提出的频谱接入机制与未处理误差的或者未采用多标拍卖的接入机制相比,认知用户获得的吞吐量更大。
[Abstract]:To solve the problem of how to coordinate multiple cognitive users to access multi-segment idle frequency domain channels, a dynamic spectrum access mechanism based on the endless Dobby gambling machine (RMAB) model is proposed. First of all, considering the channel perception error of cognitive users in real environment, a Whittle index value algorithm is derived, which can deal with the perception error effectively. The algorithm gives a certain trust value to each channel through the accumulation of historical experience. Considering the current trust value, we select the immediate benefit and future income of each channel, and select the channel that needs perceptual access. Secondly, when multiple cognitive users access the same channel, there is a problem of conflict. A coordination mechanism based on multi-bid auction is proposed to deal with the conflicts between cognitive users through multi-auction. The simulation results show that in the same environment, the throughput of the cognitive users is higher than that of the unprocessed access mechanism or the multi-auction access mechanism.
【作者单位】：移动通信技术重庆市重点实验室(重庆邮电大学);
【基金】：国家自然科学基金资助项目(61102062) 教育部科学技术研究重点项目(212145) 重庆市科委自然科学基金资助项目(cstc2011jjA1192) 重庆市教委科学技术研究项目(KJ120530) 重庆邮电大学博士启动基金资助项目(A2010-11)
【分类号】：TN925

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