Contention-Aware Spectrum Sensing and Access Algorithm of Cognitive Network
Contention-Aware Spectrum Sensing and Access Algorithm of Cognitive Network
复制标题
认知网络的竞争感知频谱感知与接入算法
DOI：
10.1109/crowncom.2008.4562558
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Xu Ming
中科院分区：
文献类型：
--
作者：
Hu Gang;Z. Qian;Xu Ming
感知和接入潜在可用频谱的技术一直是认知无线电网络的研究热点。与已有工作相比，本文提出了一种基于竞争感知网络流的集中式监听接入协议。该协议的目标是最大化整个认知网络的预期吞吐量。我们已经证明了在固定的竞争拓扑下寻找最优的感知和接入结果是NP问题。提出了一种由最小团覆盖和最大匹配算法组成的近似算法。通过详细的仿真，与未采用团覆盖和最大匹配方案的最优感知接入方案相比，近似算法的性能至少提高了30%。
The technology of sensing and access the potential available spectrum is always a hot topic for cognitive radio networks. Compare to the existing works, this paper proposes a new centralized sensing and access protocol which is based on the premise of contention-aware network flow. The target of this protocol is to maximize the expected throughput of the whole cognitive network. We have proven that finding the optimal sensing and access results under a fixed contention topology is NP problem. An approximated algorithm is proposed which is consisted by minimum clique cover and maximum matching algorithm. By detailed simulation, the performance of the approximated algorithm have at least 30% improvement comparing to the optimal sensing and access scheme which do not adopt the clique cover and maximum matching scheme.