基于CCSDS Proximity-1协议的动态变帧长策略研究  

Strategy Study of Dynamic Variable Frame Length Based on CCSDS Proximity-1 Protocol

作　　者：任放[1] 赵和平[1] 陈曦[1] 

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《航天器工程》2013年第4期72-76,共5页Spacecraft Engineering

摘　　要：为提高邻近航天器之间的通信效率,研究了Proximity-1协议与传统链路层协议的最大区别——"通信互动"功能。对航天器之间通信过程中的动态变帧长策略进行了分析,给出了不同信道环境下的最佳帧长取值,并通过实时选择最佳帧长实现了动态变帧长策略方案。利用仿真手段验证了动态变帧长策略对通信效率的改善性能。仿真结果表明,吞吐量效率最多可提高80%,证明文章提出的动态变帧长策略能在很大程度上提高通信效率。In order to improve the efficiency of proximity spacecraft communication, the paper studies ＂Hailing communication＂ , the dramatic difference between Proximity-1 and the traditional protocol. The strategy of dynamic variable frame length is analyzed, and the optimum frame lengths in different channel conditions are brought forward. Real-time selecting the optimum frame length enables dynamic variable frame length strategy. Dynamic variable frame length strategy to improve communication efficiency per- formance is verified by simulation tools. The simulation results indicate that the strategy proposed can increase the throughput efficiency by 80%, which shows that the strategy will promote the efficiency of proximity spacecraft communication evidently.

关 键 词：空间通信 空间数据系统 邻近空间链路 动态变帧长 

分 类 号：V443.1[航空宇航科学与技术—飞行器设计]