一种基于快速否定应答的空间网络文件传输协议  

A File Delivery Protocol Based on Fast Negative Acknowledgment for Space Network

作　　者：韩丰[1] 晏坚[2] 陆建华[1] 

机构地区：[1]清华大学电子工程系,北京100084 [2]清华大学宇航技术研究中心,北京100084

出　　处：《科学技术与工程》2015年第19期26-31,共6页Science Technology and Engineering

基　　金：国家自然科学基金(91338108;91438206);清华大学自主科研计划(2012Z10132);清华信息科学与技术国家实验室(筹)资助

摘　　要：针对空间网络中存在的高误码率、长延时、链路速率非对称等问题,提出了一种基于否定确认机制的远程文件管理协议(remote file process protocol,RFPP)协议。RFPP协议采用了信令纠错、否定确认(negative acknowledgment,NAK)快速重传和NAK帧结构压缩等机制,分析表明RFPP比CCSDS文件传输协议(CCSDS file delivery protocol,CFDP)具有更高的传输效率。在低轨卫星非对称链路仿真场景下,RFPP比CFDP的效率提高了7.6%。RFPP协议已成功应用于灵巧通信试验卫星,实测信道利用率大于90%。In order to reduce effects of high bit error rate, long delay and asymmetric link rate in a space network, a remote file process protocol （RFPP） based on negative acknowledgement mechanism is proposed, in which signaling error correction, NAK （negative acknowledgment） fast retransmission and NAK frame structure compression mechanism are employed. Theoretical analyses show that RFPP has higher transmission efficiency than CFDP （ CCSDS file delivery protocol）. Simulation results indicate that, for a low earth orbit satellite with asymmetric link rate, RFPP outperforms CFDP by 7.6% in terms of efficiency. RFPP has been adopted in SEPNET01 satellite and the channel utilization measured is greater than 90%.

关 键 词：空间网络 文件传输协议 否定应答 

分 类 号：TN927.2[电子电信—通信与信息系统]