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| TCP Performance Measurement in GPRS Link Adaptation Process
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Full
text: |
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Source |
International Journal of Engineering (IJE) |
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Table of Contents |
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Volume: 2 Issue: 1 |
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Pages: 1-68 |
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Publication
Date: February 2008 |
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ISSN
(Online): 1985-2312 |
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Pages |
42 - 52 |
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Author(s) |
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Published
Date |
30-02-2008 |
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Publisher |
CSC
Journals, Kuala Lumpur,
Malaysia |
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ADDITIONAL
INFORMATION |
| Keywords Abstract References Cited by Related Articles Collaborative
Colleague |
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KEYWORDS: GPRS, TCP, Performance, Link Adaptation, Coding Scheme, Network Scenarios |
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| This paper presents the results of measured TCP performance in the LA process
during the deployment of GPRS CS1 and CS2 coding schemes and after the
activation of two more coding schemes, CS3 and CS4. The measurements are
done under various network scenarios based on users’ physical locations in one
of Malaysia’s commercially deployed live GPRS networks. End-to-end FTP file
transfer application is used for the assessment together with tracing at the GPRS
air interface. The results show that TCP works well in the LA process and can
adapt to the frequent switching between the coding schemes without any
problem. The average throughput is increased by 23% for urban areas owing to
the activation of higher coding schemes and aided by TCP tuning. It is also
shown that bad radio condition is the main factor affecting throughput. TCP
performance is seen to be constant in all scenarios and it can cope with GPRS
mobility and bad radio condition, although at the expense of reduced throughput. |
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| A.K. Othman : Colleagues
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| M. Zakaria : Colleagues
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| K. Ab. Hamid : Colleagues
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