面向5G的缓存辅助多天线中继策略

doi:10.11959/j.issn.1000-0801.2017201

电信科学 ›› 2017, Vol. 33 ›› Issue (6): 2-10.doi: 10.11959/j.issn.1000-0801.2017201

• 专题：5G • 下一篇

面向5G的缓存辅助多天线中继策略

占俊,闫起发,唐小虎

西南交通大学信息科学与技术学院，四川成都 611756

修回日期:2017-06-06 出版日期:2017-06-01 发布日期:2017-06-27
作者简介:占俊（1989?），男，西南交通大学信息科学与技术学院博士生，主要研究方向为无线通信信号处理、基于缓存辅助的协作通信和能量收集通信等。|闫起发（1986?），男，西南交通大学信息科学与技术学院博士生，主要研究方向为无线通信、内容分发网络等。|唐小虎（1972?），男，西南交通大学信息科学与技术学院教授、博士生导师，主要研究方向为信息编码技术、大数据存储及处理和网络信息安全等。

Buffer-aided multiple-antenna relay strategy for 5G systems

Jun ZHAN,Qifa YAN,Xiaohu TANG

School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China

Revised:2017-06-06 Online:2017-06-01 Published:2017-06-27

摘要/Abstract

摘要：

缓存辅助多天线中继技术可以为5G通信系统提供广域覆盖范围，并且有效改善系统的吞吐率性能。研究了一个三节点多天线缓存辅助中继系统，提出了最大化系统平均吞吐率的最佳缓存辅助中继策略，即联合自适应链路选择以及功率分配方案。分析结果表明，最佳的链路选择方案仅依赖于当前的瞬时信道状态信息以及相关链路的信道统计信息，而最佳功率分配方案是对发送的数据流进行等功率分配。仿真结果表明，相对于无缓存辅助的MIMO中继系统，缓存的引入能够显著改善中继系统的吞吐率。此外，MIMO技术的引入还能够获得多天线所带来的复用增益，进一步改善缓存辅助中继系统的吞吐率。

关键词: 5G, 缓存辅助, 链路选择, 功率分配, MIMO, Alamouti编码

Abstract:

Buffer-aided multiple-antenna relay technology can provide the 5G communication system with wide coverage,and improve the system throughput performance effectively.A three-node multiple-antenna buffer-aided relay system was investigated and thus an optimal buffer-aided relay strategy,namely joint adaptive link selection and power allocation protocol,which maximizes the average throughput of system was proposed.The analytical results indicate that the optimal link selection policy depends only on the current instantaneous channel state information and the statistical channel information of related links,and the optimal power allocation scheme has equal power allocation for the transmitted data flows.The simulation results show that buffer used in relay could significantly improve the throughput of relay system compared to the relay system without buffer.In addition,the MIMO technique can achieve the multiplexing gain by multiple antennas,and then improve the throughput of buffer-aided relay system further.

Key words: 5G, buffer-aided, link selection, power allocation, multiple-input multiple-output, Alamouti code

中图分类号:

TP393

占俊,闫起发,唐小虎. 面向5G的缓存辅助多天线中继策略[J]. 电信科学, 2017, 33(6): 2-10.

Jun ZHAN,Qifa YAN,Xiaohu TANG. Buffer-aided multiple-antenna relay strategy for 5G systems[J]. Telecommunications Science, 2017, 33(6): 2-10.

图/表 3

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面向5G的缓存辅助多天线中继策略

Buffer-aided multiple-antenna relay strategy for 5G systems

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