Throughput improvement of TCP proxies in network environment with wireless LANs

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Split-connection type proxies have been proposed to improve TCP (Transmission Control Protocol) throughput in network environment with wireless LANs. A proxy is placed at the boundary of a wireless LAN (WLAN) and a wired network and it splits a TCP connection into two virtual TCP connections. We proposed a split-connection type proxy called MDA-Proxy (Modified Decreasing-ACK Proxy), which increases throughput of upflows (flows from wireless hosts to wired hosts) by decreasing the number of ACKs in a WLAN. MDA-Proxy uses two parameters, ack-stock and delay-timer, for each connection. The former controls the number of ACKs sent to a WLAN and the latter is used to recover from losses and delays of ACKs in a wired network. However, it is assumed that MDA-Proxy uses fixed values of the two parameters and their automatic tuning in response to network situation remains to be future work. In this paper, we propose a new type of proxy called ASA-Proxy (Ack-Stock Autotunning Proxy), which automatically tunes the two parameters in MDA-Proxy. Ack-stock is tuned comparing throughputs before and after its changing so that throughput of the connection becomes large, and delay-timer is replaced by the normal TCP retransmission timer because it is better than a fixed value of delay-timer for the inference of losses and delays of ACKs in a wired network. Extensive simulation runs show that ASA-Proxy is superior to MDA-Proxy.

Original languageEnglish
Title of host publicationIEEE TENSYMP 2014 - 2014 IEEE Region 10 Symposium
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages82-87
Number of pages6
ISBN (Electronic)9781479920280
Publication statusPublished - Jul 23 2014
Event2014 IEEE Region 10 Symposium, IEEE TENSYMP 2014 - Kuala Lumpur, Malaysia
Duration: Apr 14 2014Apr 16 2014

Publication series

NameIEEE TENSYMP 2014 - 2014 IEEE Region 10 Symposium

Other

Other2014 IEEE Region 10 Symposium, IEEE TENSYMP 2014
CountryMalaysia
CityKuala Lumpur
Period4/14/144/16/14

Keywords

  • ACK
  • Proxy
  • Split connection
  • TCP
  • WLAN

ASJC Scopus subject areas

  • Computer Science(all)
  • Engineering(all)

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  • Cite this

    Hui, W., Fukushima, Y., & Yokohira, T. (2014). Throughput improvement of TCP proxies in network environment with wireless LANs. In IEEE TENSYMP 2014 - 2014 IEEE Region 10 Symposium (pp. 82-87). [6863002] (IEEE TENSYMP 2014 - 2014 IEEE Region 10 Symposium). Institute of Electrical and Electronics Engineers Inc..