| 分布式认知无线网络中的频谱接入凸规划算法 |
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| 引用本文： | 赵民建,陈杰,李式巨.分布式认知无线网络中的频谱接入凸规划算法[J].电子与信息学报,2009,31(9):2214-2219. |
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| 作者姓名： | 赵民建 陈杰 李式巨 |
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| 作者单位： | 浙江大学信息与电子工程学系,杭州,310027 |
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| 基金项目： | 国家十一五"863"计划项目(2006AA01Z273)资助课题 |
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| 摘 要： | 针对分布式认知无线网络中所可能存在的多频道隐终端问题，以及分布式协调方法(DCF)在随机冲突下性能下降的问题，该文以最优化网络的效用值为目标，将各个认知节点的接入概率作为求解对象，在分布式认知无线网络中建立了一个通用的凸规划模型。同时，基于凸规划算法，提出了一种分布式的信道接入 (DSAC) 算法对目标问题进行求解，从而决定认知网络中每个节点以及每条链路的接入概率。仿真结果表明，DSAC算法能够在较少的迭代次数内实现收敛；与普通的DCF方法相比，DSAC算法可以有效地提高网络中同时传输的链路个数，提高了频谱利用率以及网络吞吐量。
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| 关 键 词： | 认知无线电 分布式无线网络 凸规划 |
| 收稿时间： | 2008-4-22 |
| 修稿时间： | 2009-4-24 |
Spectrum Access Algorithm Based on Convex Programming in Distributed Cognitive Wireless Networks |
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| Zhao Min-jian Chen Jie Li Shi-ju.Spectrum Access Algorithm Based on Convex Programming in Distributed Cognitive Wireless Networks[J].Journal of Electronics & Information Technology,2009,31(9):2214-2219. |
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| Authors: | Zhao Min-jian Chen Jie Li Shi-ju |
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| Affiliation: | Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | To overcome the multi-channel hidden terminal problem in distributed cognitive wireless networks as well as improve the performance of the network, a general convex programming model is formulated. The access probability of each cognitive user can be derived from this model. A Distributed Spectrum Access Control (DSAC) algorithm is proposed based on convex optimization. The simulation results show that DSAC can converge during a few intervals, and DSAC can also increase the number of transmission links in the network so as to improve the spectrum efficiency and the network throughput. |
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| Keywords: | Cognitive radio Distributed wireless networks Convex optimization |
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