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General Information
    • ISSN: 1793-8244
    • Frequency: Quarterly
    • DOI: 10.18178/JACN
    • Editor-in-Chief: Dr. Ka Wai Gary Wong
    • Executive Editor: Ms. Julia S. Ma
    • Abstracting/ Indexing: EI (INSPEC, IET), Engineering & Technology Digital Library, DOAJ, Electronic Journals Library, Ulrich's Periodicals Directory, International Computer Science Digital Library (ICSDL), ProQuest, and Google Scholar.
    • E-mail: jacn@ejournal.net
Editor-in-chief
Dr. Ka Wai Gary Wong
Department of Mathematics and Information Technology The Hong Kong Institute of Education, Hong Kong
It's a honor to serve as the editor-in-chief of JACN. I'll work together with the editors and reviewers to help the journal progress
JACN 2015 Vol.3(4): 255-261 ISSN: 1793-8244
DOI: 10.18178/JACN.2015.3.4.178

Retransmission Mechanism for Partially Reliable Transport Protocols Based on Multimedia Applications Transmission

Ching-Neng Lai and Yen-Hung Chen
Abstract—The partially reliable transport protocol can enhance the quality of services (QoS) of multimedia applications because it reliably transmits some packets and unreliably transmits other packets. Nevertheless, determining which packets require reliable, i.e., these packets will be retransmitted if they were lost, significantly influences the performance of multimedia applications. For the determination, existing approaches adopt a fixed threshold or require information from other layers. This paper proposes a Timeliness-aware Retransmission Mechanism (TRM) that dynamically determines which lost packets should be retransmitted without any information provided from other layers. The receiver using TRM determines a threshold, which is the packet sequence number having timeliness, according to the packet consumed rate and the Round-Trip Time (RTT). Thus the sender retransmits lost packets that can timely arrive, namely, the packets have sequence numbers larger than this threshold. Simulation results shows that PR-DCCP, a partially reliable transport protocol, with TRM can efficiently increase the Decodable Frame Ratios (DFRs), which represents QoS, and decrease the Useless Data Received Ratios (UDRRs), which represents the bandwidth waste. In the simulations, TRM can achieve 8.6~10.6% DFR improvement and 15.1%~17.6% UDRR improvement on average, compared with other retransmission methods.

Index Terms—Timeliness-aware retransmission, multimedia applications, partial reliability transmission.

Ching-Neng Lai is with the Department of Information Technology, Hsing Wu University, New Taipei City, 24452, Taiwan (e-mail: 093062@mail.hwu.edu.tw).
Yen-Hung Chen is with Cyber Trust Technology Institute, Institute for Information Industry, Taipei, 10622, Taiwan (e-mail: pplong@gmail.com).

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Cite:Ching-Neng Lai and Yen-Hung Chen, "Retransmission Mechanism for Partially Reliable Transport Protocols Based on Multimedia Applications Transmission," Journal of Advances in Computer Networks vol. 3, no. 3, pp. 255-261, 2015.

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