低轨星座空口包头去除技术研究  

Research on air interface packet header removal technology for LEO constellation

作　　者：周恒阳 张亚生[1] 张朔铭 ZHOU Heng-yang;ZHANG Ya-sheng;ZHANG Shuo-ming(The 54th Research Institute of CETC,Shijiazhuang 050000,China)

机构地区：[1]中国电子科技集团公司第五十四研究所

出　　处：《信息技术》2019年第11期97-102,共6页Information Technology

摘　　要：过大的空口IP包头造成了卫星信道带宽资源的严重浪费,为提高带宽利用率,提出了一种低轨卫星移动通信系统中空口IP包头去除技术,通过完全去除IP/UDP/RTP包头来提高数据传输效率。首先分析了该技术在卫星通信系统中应用的可行性,介绍了工作原理,描述了去头、恢复模块的实现流程,搭建了卫星移动通信空口协议栈仿真平台,在空口PDCP协议中增加了包头去除算法,进行了测试和性能分析,并与ROHC压缩算法进行比较。实验测试表明,采用IP包头去除技术将IP/UDP/RTP包头减少为0字节,极大减少了IP数据包头长度,极大提高了IP业务卫星带宽利用率。Excessive air interface IP header results in serious waste of satellite channel bandwidth resources.In order to improve bandwidth utilization,an air interface IP header removal technology in LEO satellite mobile communication system is proposed,which can improve data transmission efficiency by completely removing IP/UDP/RTP headers.Firstly,the feasibility of air interface IP header removal technology in satellite communication system is analyzed,the working principle is introduced,and the implementation process of header removal module and recovery module is described.A simulation platform of satellite mobile communication air interface protocol stack is built,and the packet header removal algorithm is added to the air interface PDCP protocol.In addition,IP packet header removal technology is tested and analyzed,and compared with ROHC compression algorithm.The experimental results show that the IP/UDP/RTP header is reduced to 0 bytes by using IP header removal technology,which greatly reduces the length of IP header and greatly improves the bandwidth utilization of IP service satellite.

关 键 词：低轨卫星通信 包头完全去除 PDCP 

分 类 号：TN927.23[电子电信—通信与信息系统]