A resequencing scheme for the selective-repeat ARQ and its performance evaluation
Toshihiro Shikama, Tadanori Mizuno · Electronics and Communications in Japan (Part I Communications) · 2006
SR (Selective-Repeat) ARQ (Automatic Repeat reQuest) is employed to recover packet errors on a satellite channel effectively. This SR ARQ has the problems of large resequencing delay and bursty packet departure due to the resequencing function. To solve these problems, this paper proposes the PFRS (Per Flow ReSequencing) scheme, which performs resequencing for each flow independently, while lost packet detection and associated retransmission are performed on the basis of whole flows. This paper shows the effectiveness of the proposed scheme by a simulation in which a number of upper layer flows, such as TCP and UDP, are multiplexed over SR-ARQ performed in layer 2. The effectiveness of this scheme includes a decrease in the average packet delay, a decrease in receiving buffer occupancy, suppression of burstiness in output packet streams, and an increase in end-to-end TCP throughput. © 2006 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 89(7): 24–34, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecja.20258