基于凸优化的FSO/RF自动请求重传协议方案  

Scheme of FSO/RF automatic request retransmission protocol based on convex optimization

作　　者：邵军虎[1,2] 江娜 杜旭晓 史魏征 Shao Junhu;Jiang Na;Du Xuxiao;Shi Weizheng(School of Automation and Information Engineering,Xi′an University of Technology,Xi′an 710048,China;Xiamen Key Laboratory of Mobile Multimedia Communications,Huaqiao University,Xiamen 361021,China)

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048 [2]华侨大学厦门市移动多媒体通信重点实验室,福建厦门361021

出　　处：《信息技术与网络安全》2022年第6期77-83,93,共8页Information Technology and Network Security

摘　　要：针对FSO/RF混合链路的高效可靠数据传输问题,研究系统在二进制相移键控(BPSK)调制与ARQ差错控制模式下双链路重传协作的优化设计方法。基于FSO信道双伽马(Gamma-Gamma)分布的湍流模型和RF信道Nakagami-m分布的衰落模型,推导得出混合链路平均包错误率与吞吐量的解析表达式,并运用凸优化求解方法得出吞吐量最优解时的数据重传协作比例系数。在不同大气湍流强度与衰落因子条件下,计算分析了FSO/RF混合链路ARQ数传方案的平均包错误率与吞吐量性能。数值结果表明,采用优化后的ARQ双链路重传比例策略,可有效提高混合链路传输的可靠性与数据吞吐量性能。Aiming at the problem of efficient and reliable data transmission of hybrid FSO/RF link,the cooperative optimized ARQ transmission model is investigated for hybrid FSO/RF link with binary phase shift key(BPSK)modulation schemes.Based on Gamma-Gamma model and Nakagami-m model for FSO atmospheric turbulence channel and RF fading channel respectively,the closed analytic expression of throughput and average packet error rate are derived for hybrid link.By adjusting the data retransmission ratio of FSO link and RF link,the data retransmission cooperation proportional coefficient of ARQ is achieved with convex optimization method.The throughput and average packet error rate performances are calculated and analyzed under different FSO channel turbulence strengths and RF channel fading factors.Numerical results show that the optimized ARQ dual-link retransmission cooperation strategy can effectively improve the reliability of hybrid link transmission and the performance of data throughput.

关 键 词：FSO/RF混合链路 吞吐量 平均包错误率 重传比例 凸优化 

分 类 号：TN929.12[电子电信—通信与信息系统]