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This article is part of the series Cross-Layer Design for the Physical, MAC, and Link Layer in Wireless Systems.

Open Access Research Article

Cross Layer PHY-MAC Protocol for Wireless Static and Mobile Ad Hoc Networks

Sylwia Romaszko* and Chris Blondia

Author Affiliations

Interdisciplinary Institute for Broadband Technology, University of Antwerp, Middelheimlaan 1, 2020 Antwerp, Belgium

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EURASIP Journal on Advances in Signal Processing 2009, 2009:278041  doi:10.1155/2009/278041

The electronic version of this article is the complete one and can be found online at: http://asp.eurasipjournals.com/content/2009/1/278041

Received:31 January 2008
Revisions received:5 June 2008
Accepted:26 July 2008
Published:4 August 2008

© 2009 The Author(s).

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.


Multihop mobile wireless networks have drawn a lot of attention in recent years thanks to their wide applicability in civil and military environments. Since the existing IEEE 802.11 distributed coordination function (DCF) standard does not provide satisfactory access to the wireless medium in multihop mobile networks, we have designed a cross-layer protocol, (CroSs-layer noise aware power driven MAC (SNAPdMac)), which consists of two parts. The protocol first concentrates on the flexible adjustment of the upper and lower bounds of the contention window (CW) to lower the number of collisions. In addition, it uses a power control scheme, triggered by the medium access control (MAC) layer, to limit the waste of energy and also to decrease the number of collisions. Thanks to a noticeable energy conservation and decrease of the number of collisions, it prolongs significantly the lifetime of the network and delays the death of the first node while increasing both the throughput performance and the sending bit rate/throughput fairness among contending flows.

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