Títol:
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Energy efficiency in latency-constrained application offloading from mobile clients to multiple virtual machines
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Autor/a:
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Lagén Morancho, Sandra; Pascual Iserte, Antonio; Muñoz Medina, Olga; Vidal Manzano, José
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Altres autors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions |
Abstract:
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Abstract:
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This paper addresses the energy-latency trade-off in distributed application offloading, in which an energy-limited handset offloads totally or partially an application to one or several virtual machines (VMs) located in remote locations or access points (APs) close to the mobile terminal (MT). One of the APs (the serving AP) provides radio access to the MT and is connected to the VMs through non-ideal backhaul (BH) links. In this setting, we optimize the offloading strategy (including the joint optimization of radio and computational resources) to minimize the energy consumption at the MT subject to a maximum latency constraint. In addition, we propose robust designs to cope with imperfect acquisition of the channel state information (CSI) and the BH parameters. Our findings show that, as far as the energy-latency trade-off is concerned, the optimal order of activation of the VMs does not depend on their processing capabilities but the delays of the BH links. However, once a VM is selected to participate in the processing, the optimal amount of processing allocated to such VM depends on its computational capabilities as well as on the features (capacity and delay) of the BH link. Additionally, offloading decisions become more conservative as the uncertainty in CSI and BH parameters increases. |
Abstract:
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Peer Reviewed |
Matèries:
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-Àrees temàtiques de la UPC::Energies::Eficiència energètica -Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal -Energy conservation -Signal processing -Application offloading -Battery savings -Cloud computing -Delays -Energy consumption -Energy efficiency -Energy-latency trade-off -Mobile communication -Optimization -Robust design -Robustness -Energia -- Estalvi -Tractament del senyal |
Drets:
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Tipus de document:
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Article - Versió presentada Article |
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