一种基于喷泉码的异构网络发包算法  

A Fountain Code Based Heterogeneous Network Packet Sending Algorithm

作　　者：袁静[1] 刘建航[1] 董轩江 李世宝[1] YUAN Jing;LIU Jianhang;DONG Xuanjiang;LI Shibao(College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao 266580)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,青岛266580

出　　处：《计算机与数字工程》2022年第1期1-6,12,共7页Computer & Digital Engineering

基　　金：国家自然科学基金项目(编号:61671482);中央高校基本科研业务费专项资金资助项目(编号:18CX02134A)资助。

摘　　要：针对ISM无线频段(如2.4GHz)异常拥堵,利用传统发送发方式造成丢包率大,吞吐量小的问题,论文提出了一种基于喷泉编码的异构网络中的发包算法。首先在异构网络(WiFi to ZigBee)的发送端采取对丢包不敏感的喷泉编码方式,通过在WiFi端模拟ZigBee的信号调制,将发送端按照LT码的编码规则输出长度为L的符号流。其次在接收端通过常规的ZigBee解调完成数据传输。最后在此基础上通过大量实验找到了实现最小丢包率的发包算法。与已有的研究成果对比表明,论文提出的方法能够提高传输效率,减少丢包重传次数,提升系统性能,所提算法能有效减小不同条件下的丢包率。For ISM radio band(e.g.,2.4GHz)abnormal congestion,the transmission made by conventional means to cause high packet loss rate and low throughput,in this paper,a novel fountain coding based on heterogeneous network is proposed.First⁃ly,the sender of the heterogeneous network(WiFi to ZigBee)adopts a fountain coding method that is not sensitive to packet loss.By simulating ZigBee signal modulation on the WiFi end,the sender outputs a symbol stream of length L according to the encoding rule of the LT code.Secondly,the data transmission is completed at the receiving end through conventional ZigBee demodulation.Fi⁃nally,through a large number of experiments,the law of packet sending to achieve the minimum packet loss rate is found.The com⁃parison with existing research results show that the method proposed in this paper can improve transmission efficiency,reduce the number of packet loss retransmissions,and improve system performance.The proposed algorithm can effectively reduce the packet loss rate under different conditions.

关 键 词：喷泉码 异构网络 时延 吞吐量 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]