Efficient Transmission Based On Packet Layer Coding For Delay Tolerant Data Streaming In Deep Space

With the development of aerospace technology,more and more manned deep space program will be conducted in the future,the demand for streaming data transmission in the deep space is increasing.There are more and more studies on streaming data transmission in deep space,which successively proposed the Bundle Streaming Service(BSS)and RTPover DTN based on Delay / Disruption Tolerant Network(DTN).However,because of the severe communication conditions in the deep space environment,these deep space streaming transmission protocols still face many problems.The characteristics of deep space networks such as long delay and high bit error rate lengthen the delivery time,reduce the transmission success rate,and reduce the transmission efficiency,which greatly affects the quality of streaming service.To solve the above problems,this paper integrates the erasure code into the upper layer of these deep space streaming transmission protocols.Compared with the traditional error correction coding scheme at the data link layer,this paper integrates error erasure code at a higher layer,to ensure stronger error correction capabilities by packet layer coding.This paper completes the design of the BSS efficient transmission based on packet layer coding and the RTPover DTN efficient transmission based on packet layer coding respectively,and conducts the improved implementation of BSS transmission protocol and RTPover DTN transmission protocol.Through an emulated deep space data streaming communication testbed,a two nodes experiment is conducted to evaluate the performance of packet layer coding for space streaming.The results of the experiments show that space streaming service with packet layer coding has obvious improvements in terms of the stream delivery time(SDT)and the end user’s display efficiency(EDE).The results reveal that our schemes show substantial advantages in streaming data delivery in deep space.