基于公平性的星地协作系统分布式中继选择策略

doi:10.3969/j.issn.1000-3428.2016.06.016

计算机工程

基于公平性的星地协作系统分布式中继选择策略

陈刘伟,梁俊,朱巍

(空军工程大学信息与导航学院,西安 710077)

收稿日期:2015-06-03 出版日期:2016-06-15 发布日期:2016-06-15
作者简介:陈刘伟(1990-),男,硕士研究生,主研方向为空天信息网络、协作通信;梁俊,教授;朱巍,硕士研究生。
基金资助:
国家自然科学基金资助项目(60972042);陕西省自然科学基金资助项目(2013ZC15008);航空科学基金资助项目(2012ZC 15008)。

Distributed Relay Selection Strategy for Satellite-terrestrial Cooperative System Based on Fairness

CHEN Liuwei,LIANG Jun,ZHU Wei

(College of Information and Navigation,Air Force Engineering University,Xi’an 710077,China)

Received:2015-06-03 Online:2016-06-15 Published:2016-06-15

摘要/Abstract

摘要： 针对星地协作系统中继节点间的不公平性,提出一种基于放大转发(AF)模式的分布式中继选择策略。对陆地移动卫星通信信道进行分析,得到系统中断概率的闭环表达式,通过引入调和因子平衡各节点被选作中继的概率,并利用AF模式将来自卫星和地面的中继节点信号进行最大比合并,从而均衡各中继节点的功率开销。仿真结果表明,与集中式中继选择策略和基于最佳路径的中继选择策略相比,该策略能有效提高星地协作系统的公平性,并降低计算复杂度。

关键词: 星地协作系统, 陆地移动卫星通信, 公平性, 中继选择, 放大转发模式

Abstract: A distributed relay selection strategy based on Amplify and Forward(AF) mode is proposed for the unfairness between relay nodes in satellite-terrestrial cooperative system.It analyzes the Land Mobile Satellite(LMS) channel,evaluates the closed-form expression of the outage probability,and balances relaying probability by finding the corresponding weight coefficient which is introduced to achieve the required fairness for each relay node.By AF mode,signals from the satellite and terrestrial relay are combined through Maximum Ratio Combining(MRC),thereby balancing the power overhead of each relay node.Simulation results show that the proposed strategy can improve the required fairness and reduce computational complexity compared with the centralized relay selection strategy and the relay selection strategy based on best path.

Key words: satellite-terrestrial cooperative system, Land Mobile Satellite(LMS) communication, fairness, relay selection, Amplify and Forward(AF) mode

中图分类号:

TN927

陈刘伟,梁俊,朱巍. 基于公平性的星地协作系统分布式中继选择策略[J]. 计算机工程, doi: 10.3969/j.issn.1000-3428.2016.06.016.

CHEN Liuwei,LIANG Jun,ZHU Wei. Distributed Relay Selection Strategy for Satellite-terrestrial Cooperative System Based on Fairness[J]. Computer Engineering, doi: 10.3969/j.issn.1000-3428.2016.06.016.

http://www.ecice06.com/CN/Y2016/V42/I6/91

参考文献

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