空间通信中的一种滑动窗口BATS码传输方案研究

Research of a Sliding Window BATS Code Transmission Method for Space Communication

针对空间通信中链路传播时延大、丢包率高、中继节点多的问题,在具有良好多级中继传输性能的BATS码基础上,提出一种滑动窗口传输方案,以提高空间传输的可靠性和时效性。利用小度值Batch对滑动窗口的非重叠区域进行编码传输,并采用不等滑动步长,实现了对滑动窗口的重叠部分和非重叠部分的均衡保护,使传输既具有较高可靠性,又具有较高的传输效率。仿真结果表明,在维持与传统的连续重叠滑窗相近可靠性的同时,传输效率提高约20%。

To solve the problems of large link propagation delay,high packet loss rate and multi-relay transmission in space communication,a sliding window transmission method was proposed to improve the reliability and timeliness of the transmission.The new method was based on the BATS code which had high performance in erasure multi-relay channel.In the scheme,the 'batches' with small degree value were used to encode and transmit the data in the non-overlapping area of the sliding windows.In addition,non-equal length sliding steps were also used.Thus,the balanced protection of the data in overlapping part and non-overlapping part of the sliding window was realized and the high transmission reliability and high transmission efficiency were both obtained.The simulation results showed that the performance of the efficiency was improved by 20% approximately while the reliability was maintained at a similar level with that of the traditional successive sliding window method.