An enhanced TCP for upward vertical handoff in integrated WLAN and cellular networks

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The integration of wireless local area networks (WLANs) and third generation (3G) cellular networks has been recently a subject of great interest, mainly aimed at augmenting cellular networks with high-rate data services by WLANs in hotspots. The complementary characteristics of 3G cellular networks and 802.11 WLANs are expected to offer the best of both technologies. On the other hand, the drastically different characteristics of both networks could be a serious obstacle to providing seamless mobility in the integrated WLAN and cellular networks. In particular, mobile users suffer from a drastic decrease in data rate after a vertical handoff from a WLAN to a 3G cellular network. However, current TCP congestion control cannot adapt to the change in the data rate after the vertical handoff, resulting in significant throughput degradation. Thus, we propose a novel TCP scheme to enhance the throughput when a vertical handoff occurs from a WLAN to a cellular network. For the proposed scheme, the throughput performance is investigated via analytic modeling and simulation.

Original languageEnglish
Pages (from-to)901-921
Number of pages21
JournalInternational Journal of Communication Systems
Volume21
Issue number9
DOIs
Publication statusPublished - 2008 Sep 1

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Wireless local area networks (WLAN)
Throughput
Degradation

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cite this

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title = "An enhanced TCP for upward vertical handoff in integrated WLAN and cellular networks",
abstract = "The integration of wireless local area networks (WLANs) and third generation (3G) cellular networks has been recently a subject of great interest, mainly aimed at augmenting cellular networks with high-rate data services by WLANs in hotspots. The complementary characteristics of 3G cellular networks and 802.11 WLANs are expected to offer the best of both technologies. On the other hand, the drastically different characteristics of both networks could be a serious obstacle to providing seamless mobility in the integrated WLAN and cellular networks. In particular, mobile users suffer from a drastic decrease in data rate after a vertical handoff from a WLAN to a 3G cellular network. However, current TCP congestion control cannot adapt to the change in the data rate after the vertical handoff, resulting in significant throughput degradation. Thus, we propose a novel TCP scheme to enhance the throughput when a vertical handoff occurs from a WLAN to a cellular network. For the proposed scheme, the throughput performance is investigated via analytic modeling and simulation.",
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An enhanced TCP for upward vertical handoff in integrated WLAN and cellular networks. / Lee, Jong Hyup; Lee, Su Kyoung; Song, Joo Seok.

In: International Journal of Communication Systems, Vol. 21, No. 9, 01.09.2008, p. 901-921.

Research output: Contribution to journalArticle

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