基于公平性的星地协作系统分布式中继选择策略
|
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。
A distributed relay selection strategy based on Amplify and Forward( AF) mode is proposed for the unfairness betw een 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 w eight coefficient w hich 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 pow er overhead of each relay node. Simulation results show that the proposed strategy can improve the required fairness and reduce computational complexity compared w ith the centralized relay selection strategy and the relay selection strategy based on best path.
A distributed relay selection strategy based on Amplify and Forward( AF) mode is proposed for the unfairness betw een 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 w eight coefficient w hich 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 pow er overhead of each relay node. Simulation results show that the proposed strategy can improve the required fairness and reduce computational complexity compared w ith the centralized relay selection strategy and the relay selection strategy based on best path.
引文
[1]Gesber D,Shafi M,Shiu D.From Theory to Practice:An Overview of MIMO Space-time Coded Wireless Systems[J].IEEE Journal on Selected Areas in Cummunications,2003,21(3):281-302.
[2]Aheffen M,Fontan F P,Lacoste F.Land Mobile Satellite Dual Polarized MIMO Channel Along Roadside Trees:Modeling and Performance Evaluation[J].IEEE Transactions on Antennas&Propagation,2012,60(2):597-605.
[3]Awoyemi B,Walingo T,Takawira F.Relay Selection Cooperative Diversity in Land Mobile Satellite[C]//Proceedings of AFRICON’13.Washington D.C.,USA:IEEE Press,2013:1-6.
[4]Bhatngar M R,Arti M K.Performance Analysis of Hybrid Satellite-terrestrial FSO Cooperative System[J].IEEE Photonics Technology Letters,2013,25(22):2197-2200.
[5]Altubaishi E S,Shen Xuemin.Spectrally Efficient Variable-rate Best Relay Selection Scheme for Adaptive Cooperative System[C]//Proceedings of 2011 IEEE Conferernce and Exbubition on Global Telecommunications.Washington D.C.,USA:IEEE Press,2011:5-9.
[6]Khisti B A,Reed D P.A Simple Cooperative Diversity Method Based on Network Path Selection[J].IEEE Journal on Selected Areas in Communications,2006,24(3):659-672.
[7]Yang Q,Zhong Y,Kwak K S,et al.Outage Probability of Opportunistic Amplify-and-forward Relaying in Nakagamim Fading Channels[J].ETRI Journal,2008,30(4):609-611.
[8]Barus B,Ngo H Q,Shin H.On the SEP of Cooperative Diversity with Opportunistic Relaying[J].IEEE Communication Letters,2008,12(10):727-729.
[9]惠鏸,张瑶,李琦.基于部分信道信息的中继选择与功率分配算法[J].计算机工程,2014,40(10):109-113.
[10]Michalopoulosh D S,Karagiannidis G K.PHY-layer Fairness in Amplify and Forward Cooperative Diversity Systems[J].IEEE Transactions on Wireless Communications,2008,7(3):1073-1083.
[11]Abdi A,Lau W,Alouini M S,et al.A New Simple Model for Land Mobile Satellite Channels:First and Second Order Statistics[J].IEEE Transactions on Wireless Communications,2003,2(3):519-528.
[12]Altubaishi E S,Shen Xuemin.A Novel Distributed Fair Relay Selection Strategy for Cooperative Wireless System[C]//Proceedings of 2012 IEEE International Conference on Communications.Washington D.C.,USA:IEEE Press,2012:4160-4164.
[13]Ikki S,Ahmed M H.On the Performance of Cooperativediversity Networks with the Nth Best-relay Selection Scheme[J].IEEE Transactions on Communi-cations,2010,58(11):3062-3069.
[14]曹蔚.基于用户公平性的中继选择算法[J].中国科技信息,2011,20(36):81-82.
[15]Nielsen J J,Olsen R L,Madsen T K,et al.Optimized Policies for Improving Fairness of Location-based Relay Selection[C]//Proceedings of IEEE Conference on Vehicular Technology.Washington D.C.,USA:IEEE Press,2013:1-5.
[2]Aheffen M,Fontan F P,Lacoste F.Land Mobile Satellite Dual Polarized MIMO Channel Along Roadside Trees:Modeling and Performance Evaluation[J].IEEE Transactions on Antennas&Propagation,2012,60(2):597-605.
[3]Awoyemi B,Walingo T,Takawira F.Relay Selection Cooperative Diversity in Land Mobile Satellite[C]//Proceedings of AFRICON’13.Washington D.C.,USA:IEEE Press,2013:1-6.
[4]Bhatngar M R,Arti M K.Performance Analysis of Hybrid Satellite-terrestrial FSO Cooperative System[J].IEEE Photonics Technology Letters,2013,25(22):2197-2200.
[5]Altubaishi E S,Shen Xuemin.Spectrally Efficient Variable-rate Best Relay Selection Scheme for Adaptive Cooperative System[C]//Proceedings of 2011 IEEE Conferernce and Exbubition on Global Telecommunications.Washington D.C.,USA:IEEE Press,2011:5-9.
[6]Khisti B A,Reed D P.A Simple Cooperative Diversity Method Based on Network Path Selection[J].IEEE Journal on Selected Areas in Communications,2006,24(3):659-672.
[7]Yang Q,Zhong Y,Kwak K S,et al.Outage Probability of Opportunistic Amplify-and-forward Relaying in Nakagamim Fading Channels[J].ETRI Journal,2008,30(4):609-611.
[8]Barus B,Ngo H Q,Shin H.On the SEP of Cooperative Diversity with Opportunistic Relaying[J].IEEE Communication Letters,2008,12(10):727-729.
[9]惠鏸,张瑶,李琦.基于部分信道信息的中继选择与功率分配算法[J].计算机工程,2014,40(10):109-113.
[10]Michalopoulosh D S,Karagiannidis G K.PHY-layer Fairness in Amplify and Forward Cooperative Diversity Systems[J].IEEE Transactions on Wireless Communications,2008,7(3):1073-1083.
[11]Abdi A,Lau W,Alouini M S,et al.A New Simple Model for Land Mobile Satellite Channels:First and Second Order Statistics[J].IEEE Transactions on Wireless Communications,2003,2(3):519-528.
[12]Altubaishi E S,Shen Xuemin.A Novel Distributed Fair Relay Selection Strategy for Cooperative Wireless System[C]//Proceedings of 2012 IEEE International Conference on Communications.Washington D.C.,USA:IEEE Press,2012:4160-4164.
[13]Ikki S,Ahmed M H.On the Performance of Cooperativediversity Networks with the Nth Best-relay Selection Scheme[J].IEEE Transactions on Communi-cations,2010,58(11):3062-3069.
[14]曹蔚.基于用户公平性的中继选择算法[J].中国科技信息,2011,20(36):81-82.
[15]Nielsen J J,Olsen R L,Madsen T K,et al.Optimized Policies for Improving Fairness of Location-based Relay Selection[C]//Proceedings of IEEE Conference on Vehicular Technology.Washington D.C.,USA:IEEE Press,2013:1-5.