mca 14(4): e6

Research Article

A Unified NET-MAC-PHY Cross-layer Framework for Performance Evaluation of Multi-hop Ad hoc WLANs

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  • @ARTICLE{10.4108/mca.1.4.e6,
        author={Rachid  El-Azouzi and Essaid Sabir and Mohammed Raiss-El-Fenni and Sujit  Kumar Samanta},
        title={A Unified NET-MAC-PHY Cross-layer Framework for Performance Evaluation of Multi-hop Ad hoc WLANs},
        journal={EAI Endorsed Transactions on Mobile Communications and Applications},
        volume={1},
        number={4},
        publisher={ICST},
        journal_a={MCA},
        year={2014},
        month={9},
        keywords={Ad hoc network, Performance Evaluation, Cross-layer architecture, Fixed point, Coupled systems},
        doi={10.4108/mca.1.4.e6}
    }
    
  • Rachid El-Azouzi
    Essaid Sabir
    Mohammed Raiss-El-Fenni
    Sujit Kumar Samanta
    Year: 2014
    A Unified NET-MAC-PHY Cross-layer Framework for Performance Evaluation of Multi-hop Ad hoc WLANs
    MCA
    ICST
    DOI: 10.4108/mca.1.4.e6
Rachid El-Azouzi1, Essaid Sabir2,*, Mohammed Raiss-El-Fenni1, Sujit Kumar Samanta1
  • 1: LIA-CERI, University of Avignon, 339 chemin des Meinajaries, Agroparc BP 1228, Avignon cedex 9, France.
  • 2: RTSE team., GREENTIC/ENSEM, Hassan II University, Route d’El Jadida BP 8118 Oasis, Casablanca, Morocco.
*Contact email: e.sabir@ensem.ac.ma

Abstract

Most of the existing works have been evaluated the performance of 802.11 multihop networks by considering the MAC layer or network layer separately. Knowing the nature of the multi-hop ad hoc networks, many factors in different layers are crucial for study the performance of MANET. In this paper we present a new analytic model for evaluating average end-to-end throughput in IEEE 802.11e multihop wireless networks. In particular, we investigate an intricate interaction among PHY, MAC and Network layers. For instance, we incorporate carrier sense threshold, transmission power, contention window size, retransmissions retry limit, multi rates, routing protocols and network topology together. We build a general cross-layered framework to represent multi-hop ad hoc networks with asymmetric topology and asymmetric traffic. We develop an analytical model to predict throughput of each connection as well as stability of forwarding queues at intermediate nodes in saturated networks. To the best of our knowledge, it seems that our work is the first wherein general topology and asymmetric parameters setup are considered in PHY/MAC/Network layers. Performance of such a system is also evaluated through simulation. We show that performance measures of the MAC layer are affected by the traffic intensity of flows to be forwarded. More precisely, attempt rate and collision probability are dependent on traffic flows, topology and routing.