Titlebook: Queueing Theory and Network Applications; 13th International C Yutaka Takahashi,Tuan Phung-Duc,Wuyi Yue Conference proceedings 2018 Springe

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Modelling Large Timescale and Small Timescale Service Variability on different time scales. In this paper we consider short and long scale service variability, where the short scale variability affects the instantaneous service speed of the service unit and the large scale effect is defined by a modulating background Markov chain. The main modelling challenge is

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A Task Scheduling Strategy with a Sleep-Delay Timer and a Waking-Up Threshold in Cloud Computingduling strategy with a sleep-delay timer and a waking-up threshold. According to the stochastic behavior of tasks with the proposed strategy, we establish a synchronous vacation queueing model with vacation-delay and .-policy. Then we derive the average sojourn time of tasks and the energy conservat

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A Clustered Virtual Machine Allocation Strategy Based on an ,-Threshold Sleep-Mode in a Cloud Envirosed on an .-threshold sleep-mode in which all the VMs in a cloud data center are clustered into two modules. The VMs in Module I are always awake, whereas the VMs in Module II will go to sleep under a light traffic load. When the number of waiting requests reaches or exceeds the threshold ., sleepin

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Performance Evaluation for a Registration Service with an Energy Efficient Cloud Architecturefree service to appeal to more anonymous users. In this paper, we propose a sleep-mode based cloud architecture, in which a free service and an optional registration service are provided on the same server. Regarding the free service as the first service, the registration service as the second optio

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Cognitive Radio Networks with Non-Ideal Spectrum Sensing and Multiple Classes of Secondary Users system evaluation. By building and analyzing a discrete-time Markov chain model, we obtain formulas for the collision probability, and the interruption rate and the average delay for the SU packets with lower priority. Finally, with the help of numerical results, we show the influence exerted the non-ideal spectrum sensing.