NDLI: Modeling and Improving TCP Performance over Cellular Link with Variable Bandwidth

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Modeling and Improving TCP Performance over Cellular Link with Variable Bandwidth

Content Provider	IEEE Xplore Digital Library
Author	Fengyuan Ren Chuang Lin
Copyright Year	2002
Abstract	To facilitate a viable evolution of cellular networks toward extensive packet data traffic, the High Speed Downlink Packet Access (HSDPA) technology is introduced. The various link adaptation techniques employed by HSDPA augment the bandwidth variation, which is identified as one of the most important factors resulting in the deterioration of TCP performance. In this paper, we firstly build an analytical model of TCP throughput to explain why the bandwidth variation degrades the TCP performance. Subsequently, a split-connection Window Adaptation TCP Proxy is proposed to improve the TCP throughput in HSDPA networks. To use the precious cellular link resources sufficiently, the length of the queue in Node-B is intentionally kept around the reference value through adaptively adjusting the sending window size of TCP proxy based on the dynamic values of varying bandwidth. Since both the disturbance caused by bandwidth variation and the feedback delay are prone to lead an unstable queue system, the robust sliding mode variable structure control theory is employed to design the proper control law to weaken the impact of noise and delay on the stability of the queue system in Node-B. The theoretical analysis and the enhanced scheme are verified through simulation experiments. The simulation results show that our TCP proxy is able to resist against bandwidth oscillation and improve the cellular link utilization.
Sponsorship	IEEE Computer Society
Starting Page	1057
Ending Page	1070
Page Count	14
File Size	1559865
File Format	PDF
ISSN	15361233
Volume Number	10
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth IP networks Multiaccess communication Spread spectrum communication Throughput Wireless communication Switches HSDPA networks. TCP performance link rate variation variable structure control
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Electrical and Electronic Engineering Software

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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