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The Distributed Coordination Function (DCF) of IEEE 802.11 is one of most commonly used MAC protocol in channel-shared wireless network, but it can't support differentiated services among various applications. In this paper, a novel probability back-off MAC protocol is proposed to provide service differentiation as well as enhance the overall system throughput. We analyze our scheme by using a Markov...
In this paper the throughput, frame discard probability, and average frame delay performance of DCF in IEEE 802.11 are analyzed and evaluated for different parameters, such as the number of users and frame size considering the network delay and the CTS/ACK time out. Related analysis and statements will be helpful to research and development of wireless networks and products.
This paper provides a simple and accurate analysis using Markov chain modeling to compute IEEE 802.11 DCF performance, in the presence of channel errors. We extend the analytical model of IEEE 802.11 DCF from Bianchi model to study throughput performance under noisy situation, where the node's transmit queue may be at times empty and then extension of his model to a nonsaturated environment and also...
The IEEE 802.11 contention-based distributed coordination function has been used in ad hoc networks, and so far, a comprehensive mathematical analysis of such multihop systems has not been reported in the literature due to complicating factors such as hidden terminals and the unreachability problem. In this paper, we propose a new analytical model based on the parallel space-time Markov chain for...
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