Improved Algorithm of CFDP Delay Estimation
Ying Li · Jisuanji gongcheng · 2011
To support reliable file transfer in deep space communication environment,this paper studies the transporting mechanism of asynchronous NAK mode of CCSDS File Delivery Protocol(CFDP).According to the dynamic adjustment timer method,this paper proposes an improved algorithm of CFDP latency estimation.In asynchronous NAK mode under bandwidth constrain,the algorithm through the predicted one-way delay to judge the network condition,NAK trigger and timer rule is optimized.Analysis results in NS2 show that the file delivery time of this algorithm is less and the throughput is larger.