EURASIP Journal on Wireless Communications and Networking

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Research Article
Open Access

TCP Traffic Control Evaluation and Reduction over Wireless Networks Using Parallel Sequential Decoding Mechanism

EURASIP Journal on Wireless Communications and Networking20072007:052492

https://doi.org/10.1155/2007/52492

©  K. Darabkh and R. Aygün. 2007

Received: 12 April 2007

Accepted: 9 October 2007

Published: 15 November 2007

Abstract

The assumption of TCP-based protocols that packet error (lost or damaged) is due to network congestion is not true for wireless networks. For wireless networks, it is important to reduce the number of retransmissions to improve the effectiveness of TCP-based protocols. In this paper, we consider improvement at the data link layer for systems that use stop-and-wait ARQ as in IEEE 802.11 standard. We show that increasing the buffer size will not solve the actual problem and moreover it is likely to degrade the quality of delivery (QoD). We firstly study a wireless router system model with a sequential convolutional decoder for error detection and correction in order to investigate QoD of flow and error control. To overcome the problems along with high packet error rate, we propose a wireless router system with parallel sequential decoders. We simulate our systems and provide performance in terms of average buffer occupancy, blocking probability, probability of decoding failure, system throughput, and channel throughput. We have studied these performance metrics for different channel conditions, packet arrival rates, decoding time-out limits, system capacities, and the number of sequential decoders. Our results show that parallel sequential decoders have great impact on the system performance and increase QoD significantly.

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Authors’ Affiliations

(1)
Electrical and Computer Engineering Department, University of Alabama in Huntsville
(2)
Computer Science Department, University of Alabama in Huntsville

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Copyright

© K. Darabkh and R. Aygün. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.