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An Improved Double Retransmission Scheme to Deferred NAK CFDP

Authors:
Haitao Wu
Zhihua Yang
Jian Jiao
Qinyu Zhang

Keywords: CCSDS file delivery protocol; deferred NAK mode; double retransmission; file delivery time; power management

Abstract:
In this paper, we put forward an improved scheme based on deferred NAK (Negative Acknowledgement) mode in CCSDS (Consultative Committee for Space Data Systems) file delivery protocol, to make a trade-off between the file delivery time and the throughput. We employ K retransmissions on the missing packets to decrease the packet error probability and lower file delivery time. We define a ratio to evaluate the performance trade-off, which denotes the decrement of file delivery time by one extra retransmitted PDU (Protocol Data Unit) relative to standard deferred NAK for different K . We determine the proper retransmission times by calculating the ratio of different K via a bulk of simulations. The simulation results indicate the performance of this scheme outperforms the standard deferred NAK mode in terms of file delivery time, especially in the scenarios with small connectivity time, long propagation delay and high Packet Error Rate (PER>0.1) greatly.

Pages: 67 to 72

Copyright: Copyright (c) IARIA, 2012

Publication date: April 29, 2012

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-61208-194-6

Location: Chamonix, France

Dates: from April 29, 2012 to May 4, 2012