Performance Evaluation of Varying Contention Window Size for Bandwidth Constrained Routing in Adhoc Networks

Dr. Antony Selvadoss Thanamani

Performance Evaluation of Varying Contention Window Size for Bandwidth Constrained Routing in Adhoc Networks

Mr. N.Sumathi * §

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Dr. Antony Selvadoss Thanamani

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§ S.N.R.Sons College

Performance Evaluation of Varying Contention Window Size for Bandwidth Constrained Routing in Adhoc Networks

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Abstract

Providing bandwidth efficient routing in ad hoc networks is a challenging task. Available bandwidth of nodes is accurately evaluated before finding route from source to destination. Accuracy of available bandwidth is mainly affected by collision and overhead due to the execution of backoff scheme. Existing bandwidth constrained routing uses binary exponential backoff which follows serial transmission and causes unfair channel access. To overcome these, implicit pipelined backoff procedure is proposed to improve the available bandwidth and reduce the overhead associated with the backoff scheme employed in medium access control layer. In this, when two nodes are sharing the channel, the remaining nodes start the channel contention procedure in parallel to transmit next packet. Thus the channel waiting time is reduced. Each node maintains separate contention window for each phase in pipelined backoff. Proper choice of contention window size has great effect on performance of the network. This proposed algorithm is combined with a reactive link disjoint multipath routing protocol called AOMDV (Adhoc Ondemand Multipath Distance Vector) to find the best path based on bandwidth. Experimental results show that this algorithm outperforms existing approach in terms of QoS metrics such as delay, throughput, packet delivery ratio and energy consumption for different contention window sizes.

References

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Mr. N.Sumathi, Dr. Antony Selvadoss Thanamani. 1970. "Performance Evaluation of Varying Contention Window Size for Bandwidth Constrained Routing in Adhoc Networks". Global Journal of Computer Science and Technology GJCST Volume 11 (GJCST Volume 11 Issue 3).

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GJCST Volume 11 Issue 3

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Journal Specifications

Crossref Journal DOI 10.17406/gjcst

Print ISSN 0975-4350

e-ISSN 0975-4172

Keywords

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Submission ReceivedJanuary 24, 2011
Peer Review Double Blind
Handling Editor
Accepted February 19, 2011
Published March 6, 2011

Version of record

v1.2

Issue date

March 12, 2011

Language

English

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Article Matrices

Total Score: 147

Country: India

Subject: Global Journal of Computer Science and Technology

Authors: Mr. N.Sumathi, Dr. Antony Selvadoss Thanamani (PhD/Dr. count: 1)

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Publish Date: 2011 03, Sun

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