地月通信链路传输协议的研究与性能分析  

Study and Performance Analysis of Transport Protocol over Cislunar Communication Links

作　　者：叶建设[1,2] 万鹏[2] 宋世杰[2] 

机构地区：[1]装备指挥技术学院信息装备系,北京101416 [2]北京跟踪与通信技术研究所,北京100094

出　　处：《计算机工程》2010年第15期15-16,19,共3页Computer Engineering

基　　金：国家"863"计划基金资助项目(2008AA12A204)

摘　　要：从传输层和应用层2个角度对空间信息传输中地月通信链路可靠传输协议进行研究,基于OPNET软件开发CCSDS协议进程级模块。针对地月骨干链路场景配置TCP、SCPS-TP、CFDP/UDP和MDP/UDP 4种可靠传输方式,并进行协议仿真与性能分析。实验结果表明,在长传播延迟、高误码率和高度不对称性前/返向信道速率的链路上,SCPS-TP协议失去了TCP增强优势,MDP协议也表现一般,而CFDP协议的可靠传输模式能较好地适应于这种环境。This paper concerns the study of reliable transport protocols employed in cislunar telecommunication environments from the two perspectives of transport layer and application layer.Based on OPNET software,CCSDS process-level modules are developed.Four kinds of reliable transport mechanism including TCP,SCPS-TP,CFDP and MDP are configured,and protocol emulation and performance analysis are conducted.Experimental results show that,with the long propagation delay,high error rate and a high degree of asymmetry in front/back to the channel rate of the links,SCPS-TP losts the advantage of TCP performance enhancement,MDP is in general,while the CFDP reliable transmission protocol model can well adapt to this environment.

关 键 词：空间通信 SCPS-TP协议 CFDP协议 MDP协议 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]