摘要
随着因特网技术的高速发展,如何利用基于可靠连接的传输控制协议(TCP)作为传输机制成为空间环境下测控通信的新问题。在研究航天科学数据业务的特点和空间传输信道特点及链路特性的基础上,分析了空间环境下TCP传输机制具有长时延和高误码率等缺陷。针对这些问题提出了用于空间高时延信道条件下的TCP高速传输的解决方法,并详细阐述2种方法的原理和实现途径。经过系统仿真,证明此方法可行,传输性能得到显著的提高。
With the development of Internet technology,how to use TCP protocol which is based on reliable connection as transfer mechanism in space environment becomes a new communications problem.Based on full study on the characteristics of space science data services and researching on the features of space transmission channel,this paper analyses the defects of TCP in space environment such as long time-delay and high error rate etc.To solve these problems,two high speed transmission solutions based on TCP protocol are put forward.The principle and the implementation of these two solutions are explained in detail.Finally,these solutions are proved to be feasible by system simulation,and can significantly improve the transmission performance.
出处
《无线电通信技术》
2011年第4期21-24,共4页
Radio Communications Technology
关键词
空间环境
TCP
长时延
拥塞窗口
space environment
TCP
long time-delay
congestion window
