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Cross-layer optimization has been recently proposed for improving the performance of real-time video transmission over 802.11 WLAN. In this paper, an improved IEEE 802.11 WLAN analytical model under unsaturated traffic conditions was proposed. It adapts Distributed Coordination Function (DCF) models to handle all the states. Two special states were added for this model, one is the idle state, which...
An analytical model is employed to solve a cross-layer optimization problem in IEEE 802.11 wireless local area networks (WLANs). Closed-form expressions for the optimum retry limit, packet overflow drop rate and overall loss rate are derived using M/M/l queuing model, and subsequently an adaptive MAC retry limit scheme is studied. Furthermore simulation results (network simulator-2) will verify the...
A constantly growing interest in cellular and mobile technology has lead to a need for MAC protocols specifically designed to accommodate high bandwidth multimedia services with high mobility (such as vehicular networks) unlike conventional cellular telephony systems. This paper presents the design and performance evaluation of a MAC protocol for a motorway environment with audio sources and variable...
A scheme that exploits the broadcast nature of the wireless communication in order to achieve multicast content delivery is presented in this paper. As opposed to broadcasting, this method enables the clients to determine on-line the delivered content, and thus preserves the advantages of an individual service. On the other hand, a multicast content delivery is much more efficient than a unicast content...
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