认知合作中继网络中的最优中继选择策略

doi:10.11959/j.issn.1000-0801.2015228

电信科学 ›› 2015, Vol. 31 ›› Issue (11): 30-35.doi: 10.11959/j.issn.1000-0801.2015228

认知合作中继网络中的最优中继选择策略

刘银山^1,^2,³,钟晓峰^1,²,王京^1,²

¹ 中央财经大学信息学院北京 100081
² 清华信息科学与技术国家实验室北京 100084
³ 空军大连通信士官学校大连 116600

出版日期:2015-11-20 发布日期:2015-12-14
基金资助:
国家重点基础研究发展计划（“973”计划）基金资助项目;国家科技重大专项基金资助项目

Optimal Relay Selection Strategy in Cognitive Cooperative Relaying Network

Yinshan Liu^1,^2,³,Xiaofeng Zhong^1,²,Jing Wang^1,²

¹ Tsinghua National Laboratory for Information Science and Technology, Beijing 100084,China
² Department of Electronic Engineering,Tsinghua University,Beijing 100084,China
³ Dalian Airforce Communication NCO Academy,Dalian 116600,China

Online:2015-11-20 Published:2015-12-14
Supported by:
The National Basic Research Program of China （973 Progrma）;The National Science and Technology Major Project

摘要/Abstract

摘要：

认知合作中继通信可以有效提升无线通信网络的性能和频谱效率。在中继节点较多的情况下，最优中继选择是一个有待解决的问题，它是中继探测成本与合作通信的分集增益之间的一个折中。基于有限情形的最优停时理论给出了最优中继选择策略，进一步得到一个纯SNR（signal-to-noise ratio，信噪比）阈值结构的策略。数字仿真结果验证了其有效性，在待探测中继较多和每个中继探测成本较高情况下，该最优中继选择策略以最少的探测次数获得最大的收益增益。

关键词: 中继选择, 最优停时理论, 合作通信, 认知无线电

Abstract:

Cognitive cooperative relaying communication significantly improves the performance of wireless communication networks and spectral efficiency.Optimal relay selection problem,which characterize the desired tradeoff between the probing cost for establishing cooperative transmission and hence higher reward via cooperative diversity,is a hard issue when the number of relay nodes is large.Optimal relay selection strategy was established by using optimal stopping theory with a finite horizon.Furthermore,a pure SNR（signal-to-noise ratio）threshold structure was exhibited.Theoretical analysis and numerical results indicate that proposed optimal relay selection strategy is effective in reducing the number of probing candidate relays and improving the reward of source.

Key words: relay selection, optimal stopping theory, cooperative communication, cognitive radio

刘银山,钟晓峰,王京. 认知合作中继网络中的最优中继选择策略[J]. 电信科学, 2015, 31(11): 30-35.

Yinshan Liu,Xiaofeng Zhong,Jing Wang. Optimal Relay Selection Strategy in Cognitive Cooperative Relaying Network[J]. Telecommunications Science, 2015, 31(11): 30-35.

图/表 5

参考文献 10

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认知合作中继网络中的最优中继选择策略

Optimal Relay Selection Strategy in Cognitive Cooperative Relaying Network

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