Modelling MAC-layer saturation throughput in WLAN mesh networks

Authors:
Lei Lei;Jinhua Zhou;Liang Zhou;Xiaoming Chen;Cheng Luo
Affiliations:
College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Venue:
International Journal of Ad Hoc and Ubiquitous Computing
Year:
2013

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Abstract

This paper focuses on modelling the medium access control MAC layer saturation throughput in IEEE 802.11s wireless local area network WLAN mesh networks. The authors first analyse the request-to-send RTS collision range and the data collision range that induced by the hidden terminal problem and obtain the RTS collision probability and the data collision probability, respectively. The authors confirm that the fundamental problem of modelling the saturation throughput in multi-hop environments is to distinguish the different backoff procedures induced by RTS collisions and data collisions. To this end, the authors introduce the concept of pseudo state and put forward a novel bidimensional Markov model which fully takes the discrepancy of these two kinds of backoff procedures into account. Moreover, the authors derive the accurate expression of the saturation throughput of WLAN mesh networks. Finally, the authors evaluate the accuracy of the proposed model through extensive simulations, and the results demonstrate the efficiency of the model.