Opportunistic MAC layer design with stochastic Petri Nets for multimedia ad hoc networks

• Published in: Concurrency and computation Vol. 22; no. 10; pp. 1308 - 1324
• Main Authors: Escheikh, M., Barkaoui, K.
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.07.2010
• Subjects: ad hoc networks; Channels; cross-layer; Differentiation; Fading; Mathematical models; Networks; non-Markovian SPN; Performance evaluation; Petri nets; QoS; Stochasticity
• ISSN: 1532-0626; 1532-0634; 1532-0634
• DOI: 10.1002/cpe.1581

Providing optimal resource utilization while minimizing costs involved for wireless networks remains a challenging issue. Particularly mobile ad hoc environments subject to multi‐path fading and characterized by a dynamic topology need better resource management mechanisms. The focus of this paper is the performance evaluation of IEEE 802.11e MAC layer modeling under slow time‐varying Rayleigh fading channel via both layered and multi‐layered design approaches via a non‐Markovian Stochastic Petri Nets modeling. We propose two MAC IEEE 802.11e models considering service differentiation features. The first one is non cross‐layer based, whereas the second is cross‐layer based. The cross‐layer design approach adopted permits us to deal with both collisions and fading. We show the impact of the virtual load on the expected throughput. Compared to the conventional approach, our cross‐layered design approach provides significant performance gains. Copyright © 2010 John Wiley & Sons, Ltd.