Analysis of power saving with continuous connectivity

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• 作者：Vincenzo Mancuso^a ; ^{vincenzo.mancuso@imdea.org}  ; [Author Vitae] ; Sara Alouf^b ; ^{sara.alouf@inria.fr}  ; [Author Vitae]
• 关键词：Green IT ; Continuous connectivity ; Power saving ; Analysis
• 刊名：Computer Networks
• 出版年：2012
• 期刊代码：28_13891286
• 类别：cp
• 出版时间：5 July, 2012
• 卷：56
• 期：10
• 页码：2481-2493
• 文件大小：680 K

摘要

Always-on mobile users need high bandwidth channels with negligible access delay and limited power consumption. Such a continuous connectivity mode requires the management of high-speed channels, which can turn into substantial operational costs (i.e., power consumption rate) even in presence of low traffic, unless a power saving mechanism is enforced. In this paper, we analyze the impact of 3GPP-defined power saving mechanisms on the performance of users with continuous connectivity. We develop a model for packet transmission and operational costs. We model each downlink mobile user鈥檚 traffic by means of an M/G/1 queue, and the base station鈥檚 downlink traffic as an M/G/1 PS queue with multiple classes and inhomogeneous vacations. The model is validated through packet-level simulations. Our results show that consistent power saving can be achieved in the wireless access network, as high as 75%for mobiles and 55%for base stations.