认知无线Mesh网络中基于概率的贪婪频谱决策技术研究 |
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引用本文: | 杨云,章国安,邱恭安. 认知无线Mesh网络中基于概率的贪婪频谱决策技术研究[J]. 计算机科学, 2012, 39(109): 163-165 |
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作者姓名: | 杨云 章国安 邱恭安 |
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作者单位: | (南通大学电子信息学院 南通 226019) |
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摘 要: | 认知无线电网络传统的频谱决策方法中次用户根据不同的判据选择信道,会引起信道竞争和拥塞。针对认知无线Mesh网络中基于概率的频谱决策方法,提出一种贪婪信道选择算法,当发生频谱切换时,其结合改进的抢占优先(
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关 键 词: | 认知无线Mesh网络,频谱决策,贪婪算法 |
Research of Probability-based Greedy Spectrum Decision in Cognitive Wireless Mesh Networks |
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Abstract: | For the traditional spectrum decision methods in cognitive radio networks, the secondary users select their communication channel based on various criteria, which may result in channel contend and congest. Considering probability-based spectrum decision in cognitive wireless mesh networks,a greedy channel selection algorithm was proposed. When spectrum handoff occurres, the proposes algorithm combined with the improved preemptive resume priority (PRP) M/G/lqucuing theory to select optimal target channels for secondary users. Numerical analysis results show that the algorithm can increase and balance the channel utilization. With lower average arrival rate of secondary users,the average overall transmission time of the secondary users has been further reduced and the network performance isenhanced. |
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Keywords: | Cognitive wireless Mesh networks Spectrum decision Greedy algorithm |
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