Expected file delivery time of immediate nak arq in ccsds file delivery protocol
AbstructIn this paper, we analyze the Immediate NAK ARQ scheme of the CFDP (CCSDS File Delivery Protocol). We consider the single-hop file transfer operation. For the environment of long propagation delay, we present a performance model of CFDP. On the basis of this model, we analyze the relation between protocol parameters and performance. As performance measures, this paper is mainly concerned for the time taken to transfer a file (expected file delivery time) and throughput efficiency, which result from the protocol specification. Our study focuses on setting timer values to minimize the expected file delivery time under the constraint that the throughput efficiency is never compromised.