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TCP Throughput Effective Vertical Handoff Decision Scheme for Heterogeneous Wireless Networks  

Seok, Woo-Jin (한국과학기술정보연구원 연구망개발팀)
Choi, Young-Hwan (충남대학교 컴퓨터공학과)
Kim, Sang-Ha (충남대학교 컴퓨터공학과)
Publication Information
Journal of KIISE:Information Networking / v.34, no.6, 2007 , pp. 505-513 More about this Journal
Abstract
Vertical handoff is a new type of handoff in wireless networks. It is issued when a mobile node moves over overlapping wireless networks with each proving a different access bandwidth, transmission latency, and coverage. By issuing the vertical handoff, the mobile node can obtain better network bandwidth. In the sense of TCP throughput, however, the vertical handoff does not always produce positive performance gain, so sometimes it is better for the mobile node to stay at lower bandwidth providing network rather than to select and move to higher bandwidth providing network. In this paper, we analyze TCP throughput for vertical handoff, and propose a new handoff decision scheme which can estimate TCP throughput at the moment of vertical handoff. Based on the estimation, a mobile node can decide to issue vertical handoff to produce better TCP throughput, and we verify the results by simulations.
Keywords
Vertical handoff decision; TCP throughput; Heterogeneous wireless networks;
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