Abstract
A Unified NET-MAC-PHY Cross-layer Framework for Performance Evaluation of Multi-hop Ad hoc WLANs
Highlights
In next-generation wireless networks, it is expected that the IEEE 802.11 wireless LAN (WLAN) will play an important role and affect the style of people’s daily life
The distributed coordination function (DCF) of the IEEE 802.11 is based on the CSMA/CA protocol in which a node starts by sensing the channel before attempting any packet
We have developed a cross-layered model built on the IEEE 802.11e Enhanced DCF (EDCF) standard
Summary
In next-generation wireless networks, it is expected that the IEEE 802.11 wireless LAN (WLAN) will play an important role and affect the style of people’s daily life. There are lot of interests in modeling the behavior of the IEEE 802.11 DCF (Distributed Coordination Function) and studying its performances for both architectures: the WLAN networks and multi-hop wireless networks. In ad hoc networking context, each neighbor node could assist in the ongoing transmission by exploiting the broadcast nature of the wireless medium Almost all these studies have been focused on MAC layer without taking into account routing and cooperation level of nodes in ad-hoc networks, see e.g. Yang et al [16] proposed an extension of Bianchi’s model [5] and Kumar et al [8] for multi-hop context under symmetric scenario They studied the impact of carrier sensing range and the transmission power on the sender throughput. Medepalli et al [10] proposed an interesting framework model for analyzing throughput, delay and fairness characteristics of IEEE 802.11 DCF multi-hop networks.
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