| 认知Mesh网络中的多信道MAC协议设计 |
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| 引用本文： | 彭易,朱磊,赵莺,陈彦德.认知Mesh网络中的多信道MAC协议设计[J].计算机工程,2011(24):77-80. |
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| 作者姓名： | 彭易 朱磊 赵莺 陈彦德 |
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| 作者单位： | [1]解放军理工大学通信工程学院,南京210007 [2]总参谋部网络技术管理中心,北京100840 [3]南京军区网络技术管理中心,南京210002 |
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| 基金项目： | 基金项目：国家＂863”计戈Ⅱ基金资助项目（2009AA012243） |
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| 摘 要： | 现有认知无线Mesh网动态信道接入协议在利用空闲授权信道进行数据传输时，冲突概率较大。为此，提出一种基于声望模型的信道分配算法。该算法通过对各个授权信道传输的历史经验进行学习，使认知用户能够获取每个授权信道的声望值。在信道协商阶段，接收方认知用户根据信道的声望值大小，从可用信道集合中选取出期望传输成功率最高的信道，能较好地减少多个认知用户在同一空闲授权信道上的竞争，并有效降低认知用户与主用户发生冲突的概率。仿真结果表明，该算法能有效提高认知用户传输数据报文的成功率，增加网络的整体吞吐量。
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| 关 键 词： | 认知无线电 信道分配 声望模型 遗忘因子 多信道 |
Design of Multi-channel MAC Protocol in Cognitive Mesh Network |
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| PENG Yi,ZHU Lei,ZHAO Ying,CHEN Yan-de.Design of Multi-channel MAC Protocol in Cognitive Mesh Network[J].Computer Engineering,2011(24):77-80. |
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| Authors: | PENG Yi ZHU Lei ZHAO Ying CHEN Yan-de |
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| Affiliation: | 1. Institute of Communication Engineering, PLA University of Science and Technology, Nanjing 210007, China; 2. Network Technology Management Center, General Staff, Beijing 100840, China;. 3. Nanjing Military Region Network Technology Management Center, Nanjing 210002, China) |
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| Abstract: | In order to solve the severe collision in the data transmission of multi-channel dynamic access protocol over cognitive wireless mesh network, a new channel assignment algorithm based on reputation model is proposed. The algorithm computes the channel reputation by learning a model based on previous experience of primary channel transmission. In the negotiation phase, the cognitive receiver chooses the channel with the most expected rate of success by comparing the channel reputation. The transmission error can be reduced by avoiding the channel collision with the other cognitive users and the primary users. Simulation results demonstrate that the algorithm can improve the success ratio and the network throughput effectively. |
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| Keywords: | cognitive radio channel assignment reputation model forgetting factor multi-channel |
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