中文摘要：

Proximity-1空间数据链路协议是CCSDS推荐的4个空间数据链路层协议之一,是专门为邻近空间链路制定,一般用于航天器之间近距测控通信任务。为了提高临近航天器之间通信的吞吐量,本文分析了Proximity-1协议中的COP-P处理过程,并对其的不足之处进行了改进,推导出吞吐量与误码率、帧长等参数关系公式,并进行了仿真验证,得出误码率不同时,选用不同的帧长,吞吐量最多可提高20%,证明选用不同的帧长发送,可以提高系统吞吐量,为空间数据链路协议的应用提供参考。

英文摘要：

The Proximity-1 is one of the four space data link layer protocols recommended by the CCSDS（Consultative Committee of Space Data System）. The Proximity-1 protocol is created especially for adjacent space links, and is commonly used in short range TTC communication tasks between spacecraft. For the purpose of increasing the throughput of the communications between adjacent spacecraft, this paper analyzed and improved the deficiencies of the COP-P process of the Proximity-1 protocol. The mathematical relationships between the throughput and parameters including bit error rate and frame length were firstly derived and then verified using simulations. The results show that, given different bit error rates, the throughput can increase by up to 20% if using different frame lengths. In other words, the throughput of system can be increased by choosing different frame lengths for sending. This finding is of referential significance for the application of the space data link protocols.