tailieunhanh - Báo cáo hóa học: " Research Article An IEEE 802.11 EDCA Model with Support for Analysing Networks with Misbehaving Nodes"

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 An IEEE EDCA Model with Support for Analysing Networks with Misbehaving Nodes | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2010 Article ID 209895 13 pages doi 2010 209895 Research Article An IEEE EDCA Model with Support for Analysing Networks with Misbehaving Nodes Szymon Szott Marek Natkaniec and Andrzej R. Pach Department of Telecommunications AGH University of Science and Technology Al. Mickiewicza 30 30-059 Krakow Poland Correspondence should be addressed to Szymon Szott szott@ Received 22 June 2010 Revised 12 August 2010 Accepted 9 November 2010 Academic Editor David Laurenson Copyright 2010 Szymon Szott et al. 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. We present a novel model of IEEE EDCA with support for analysing networks with misbehaving nodes. In particular we consider backoff misbehaviour. Firstly we verify the model by extensive simulation analysis and by comparing it to three other IEEE models. The results show that our model behaves satisfactorily and outperforms other widely acknowledged models. Secondly a comparison with simulation results in several scenarios with misbehaving nodes proves that our model performs correctly for these scenarios. The proposed model can therefore be considered as an original contribution to the area of EDCA models and backoff misbehaviour. 1. Introduction The IEEE standard 1 for wireless local area networks WLANs does not provide users with incentives to cooperate when accessing the shared radio channel. Therefore misbehaviour in the form of selfish parameter configuration may become a serious problem. This is in particular true for Enhanced Distributed Channel Access EDCA one of the medium access functions of IEEE . EDCA provides Quality of Service QoS for WLANs through traffic differentiation. It defines new medium access .