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IEICE TRANSACTIONS on Communications

TCP Context Switching Scheme to Enhance Throughput by Adapting Well to Vertical Handoff in Heterogeneous Wireless Networks

Woojin SEOK, Sang-Ha KIM

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Summary :

Vertical handoff is a new type of handoff that is triggered when a mobile node moves over heterogeneous wireless networks with each proving different access bandwidth, transmission latency, and coverage. A mobile node can achieve higher throughput by accessing a higher bandwidth providing wireless network. However, TCP has to experience drastic changes of the bandwidth and the latency due to the vertical handoff which must be recognized as a network congestion, and this degrades end-to-end performance. In this paper, we propose a TCP context switching scheme, named Context-Switching TCP, that maintains TCP variables separately for different types of wireless networks. Through simulations, Context-Switching TCP shows higher performance than TCP SACK for vertical handoff. Especially, it shows much higher performance gain when vertical handoff occurs frequently.

Publication
IEICE TRANSACTIONS on Communications Vol.E91-B No.5 pp.1423-1435
Publication Date
2008/05/01
Publicized
Online ISSN
1745-1345
DOI
10.1093/ietcom/e91-b.5.1423
Type of Manuscript
PAPER
Category
Network

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