Energy-Efficient, QoS-Aware Packet Scheduling in High-Speed Networks


In current business routers, faster network processor units (NPUs) in line cards (LCs) will considerably improve network QoS performance. But, this improvement may come at a high cost of energy consumption. In this paper, we tend to propose and investigate two categories of QoS-aware DVFS-primarily based packet scheduling schemes. The primary class uses queue length (QL) to manage execution rates in line cards, whereas the second uses link utilization to achieve the identical purpose. Excessive reduction in execution rate to save lots of energy, but, could result in a pointy increase in network delay. To deal with this challenge, totally different frequency scaling methods are proposed, and therefore the performance of their associated schedulers is investigated. The simulation results show that both QL-aware and Load-aware DVFS have potential for important energy saving in high-speed networks, with acceptable delay performance. Furthermore, a simulation study is administered to match the performance of the proposed schemes to similar schemes described within the literature for different network environments and traffic loads. The results show that the $textmbartextQtextLA$ scheme achieves the most effective results, with performance gains of up to nine.5% energy saving, whereas meeting the QoS performance of the supported applications.

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