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19 octobre 2015
- handle: 10670/1.w5uop1
- hal: hal-01094506
info:eu-repo/semantics/OpenAccess
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Olivier Brun et al., « A Fluid model based Heuristic for Optimal Speed-scaling in Bandwidth-sharing Networks », HAL-SHS : sciences de l'information, de la communication et des bibliothèques, ID : 10670/1.w5uop1
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Résumé
We investigate the energy-delay tradeoff in multi-class queues in which the server can regulate its speed ac- cording to the load of the system. Assuming that the queue is initially congested, we investigate the rate al- location to the classes that drains out the queue with minimum total energy and delay cost. We propose to solve this stochastic problem using a deterministic fluid approximation. We show that the optimal-fluid solution follows the well-known cμ rule and obtain an explicit expression for the optimal speed. Numerical results show the utility and the applicability of the fluid-optimal policy.