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In this paper a mathematical model of Constrained Priority Countdown Freezing (CPCF) protocol is introduced. In the new model presented, the existing model of simplified CPCF is expanded in order to include the binary exponential backoff (BEB) algorithm. Thus, the behavior of a single CPCF station is modeled using four-dimensional Markov chain. In addition, the probability of the contention loss after...
The exponential growth of wireless technologies attracted many research to improve the quality of service (QoS) of global wireless networks such as 802.11 and 802.16. In specific, research targeted the physical layer (PHY) parameters and medium access control (MAC) mechanisms to improve QoS. In this paper we provide a simple yet efficient model to maintain the quality of service for wireless networks...
In this paper the authors present an analytical model that - compared to previously published work - more accurately captures the delay of IEEE 802.11 protocol under low, medium, and near-saturation load conditions. A Markov chain is used to keep track of the instantaneous number of (active) nodes that have a frame to transmit. One advantage of the proposed analytical model is its ability to estimate...
To study the relationship between two groups of parameters, namely, the numbers of vehicle nodes, the contention windows, the hidden/exposed vehicle nodes and the system throughput, this paper propose a discrete markov analytic model for performance evaluation of IEEE 802.11 broadcasting protocol for vehicular ad hoc networks. Then, the dynamic relationship between optimized throughput and minimum...
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