摘要
当卫星链路传输5G业务时,用户UDP业务基本不受影响,TCP业务主要表现为下载、上传速率上不去,严重影响用户体验,这主要是因为TCP受带宽延时积的限制,延时越大,传输速率越低。通过分析5G网络用户面GTP协议,针对卫星网络传输大延时和较高误码率等特点,进行GTP协议加速优化技术研究。首先,采用TCP加速技术,解决大延时情况下传输速率低的问题。其次,分析了5G网络用户面使用的GTP协议,包头比较长,可以缩减一些包头字段,对包头进行优化。最后,网络中小包比较多,严重影响传输速率,为此,采用包合并拆分技术,对载荷进行优化,提高小包传输速率。测试结果表明,通过在卫星网络中引入TCP加速网关,在加速网关中进行包头优化和载荷优化,5G业务在卫星链路中能够高效传输。
When the satellite link transmits 5G service,the user's UDP service is basically not affected,while the TCP service is mainly shown as the download and upload rate is relatively low,which seriously affects the user experience.This is mainly because TCP is limited by the bandwidth delay product.The greater the delay,the lower the transmission rate.By analyzing the 5G network user plane GTP protocol,aiming at the characteristics of large delay and high bit error in satellite network transmission,the GTP protocol acceleration optimization technology is studied.First,TCP acceleration technology is adopted to solve the problem of low transmission rate under the condition of large delay.Secondly,the GTP protocol used in 5G network user interface is analyzed.The packet header is relatively long,and some packet header fields can be reduced to optimize the packet header.Finally,there are many packets in the network,which seriously affects the transmission rate.Therefore,the packet merging and splitting technology is adopted to optimize the load and improve the packet transmission rate.The test results show that 5G service can be transmitted efficiently in satellite link by introducing TCP acceleration gateway into satellite network and optimizing packet header and load in acceleration gateway.
作者
王云飞
李晓晨
王凯
张荣超
郝晓强
郭晓龙
Wang Yun-fei;Li Xiao-chen;Wang Kai;Zhang Rong-chao;Hao Xiao-qiang;Guo Xiao-long(Space Star Technology Co.,LTD Satellite communication department,Beijing 100095;261035 unit of the Chinese people's Liberation Army,Beijing 102205)
出处
《电子质量》
2022年第10期5-10,16,共7页
Electronics Quality
