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Báo cáo hóa học: " Research Article Design and Implementation of an Enhanced 802.11 MAC Architecture for Single-Hop "

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Design and Implementation of an Enhanced 802.11 MAC Architecture for Single-Hop | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 28315 12 pages doi 10.1155 2007 28315 Research Article Design and Implementation of an Enhanced 802.11 MAC Architecture for Single-Hop Wireless Networks Ralph Bernasconi 1 Silvia Giordano 1 Alessandro Puiatti 1 Raffaele Bruno 2 and Enrico Gregori2 1 Department of Innovative Technologies The University of Applied Sciences of Southern Switzerland SUPSI Via Cantonale Gallera 2 6928 Manno Switzerland 2 Institute for Information Technology IIT National Research Council CNR Via G. Moruzzi 1 56124 Pisa Italy Received 29 June 2006 Revised 25 September 2006 Accepted 27 November 2006 Recommended by Marco Conti Due to its extreme simplicity and flexibility the IEEE 802.11 standard is the dominant technology to implement both infrastructure-based WLANs and single-hop ad hoc networks. In spite of its popularity there is a vast literature demonstrating the shortcomings of using the 802.11 technology in such environments such as dramatic degradation of network capacity as contention increases and vulnerability to external interferences. Therefore the design of enhancements and optimizations for the original 802.11 MAC protocol has been a very active research area in the last years. However all these modifications to the 802.11 MAC protocol were validated only through simulations and or analytical investigations. In this paper we present a very unique work as we have designed a flexible hardware software platform fully compatible with current implementations of the IEEE 802.11 technology which we have used to concretely implement and test an enhanced 802.11 backoff algorithm. Our experimental results clearly show that the enhanced mechanism outperforms the standard 802.11 MAC protocol in real scenarios. Copyright 2007 Ralph Bernasconi et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use .