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The performance requirements and amount of work of an I/O workload affect the number of storage devices and the run time needed by the workload, and should be included in the calculation of the cost or energy consumption of storage devices. This paper introduces models to calculate the cost and energy consumption of storage devices for running a variety of workloads, categorized by their dominant...
In speed scaling systems, the execution speed of a processor can be adjusted dynamically under operating system control to provide tradeoffs between response time, fairness, and energy consumption. In this paper, we propose and evaluate an approach called envelope-based turbo charging, applied in conjunction with Fair Sojourn Protocol (FSP) scheduling and job-count-based speed scaling. This approach...
The end of Dennard scaling (i.e., the ability to shrink the feature size of integrated circuits while maintaining a constant power density) has now placed energy as a primary design principle in par with performance, all the way from the hardware to the application software. Along this line, optimizing the performance-energy balance of the 7/13 "dwarfs", introduced by UC Berkeley in 2006,...
This paper focuses on the optimization of energy efficiency (EE) for BSs with distributed multiple-input multiple-output (MIMO) using an efficient antenna sleep strategy. A novel metric called sleep EE gain is proposed in this paper to evaluate the energy efficiency performance of sleep strategy in distributed MIMO systems. A related closed-form expression is developed to determine the optimum antenna...
In-network processing (INP) is a promising method that allows aggregation of data while it is being transferred along the communication paths as a means to optimize the utilization of network resources without violating the quality of information (QoI) requirements. Given the large amount of data existing in dynamic environments, the optimization of INP requires a distributed framework that can adapt...
In the recent past, we witnessed to a dramatic growth of networks with a huge number of interconnected wireless nodes exchanging large amounts of information. This has brought to the need of ad-hoc, energy-aware protocols suitable for low-power and lossy networks. Among these, Routing Protocol for Low Power and Lossy Networks (RPL) is surely one of the most interesting ones. It chooses the optimal...
Non-volatile memory (NVM) is considered as the most promising candidate of main memory due to many attractive properties, such as shock-resistivity, non-volatility, high density and near zero leakage power. However, the write endurance and high write energy consumption greatly limit its adoption in modern memory systems. In this paper, we propose a write reduction technique, called Min-Shift, to reduce...
The multiplication of local access technologies and the increasing number of connected devices exhort today's home networks to be more energy-efficient. In the literature, such kind of challenge is usually handled from the standpoint of devices remaining battery, making resulting approaches specific to resources constrained networks (e.g. wireless sensor networks, ad-hoc networks, etc.). This paper...
With the increased use of smart phones, Wireless Multimedia Sensor Networks (WMSNs) will have opportunities to deploy such devices in several contexts for data collection and processing. While smart phones come with richer resources and can do complex processing, their battery is still limited. Therefore, data reduction techniques can be used on these devices to reduce energy consumption. One of the...
Recent technological advances in communication sector have resulted in the development and improvement of wireless sensor networks consisting of low cost, low power and smaller multi-functional sensor units. Limited battery life of sensor nodes is one of the critical issues in wireless sensor networks. Energy dissipation for data transfer from nodes to base station is the crucial cause of energy depletion...
Mobility, energy limits and traffic congestion are the main reasons for a poor routing performance in MANETs. Inspired by those challenges, this paper proposes a new routing scheme named Mobility, Energy and Congestion Aware Routing (MECAR) to improve routing performance for MANETs. In this model, a node monitors the mobility, energy consumption and traffic congestion based on a multi-metric named...
The random distribution of sensors and the irregularity of routing paths lead to unordered sensory data which are difficult to deal with in Wireless Sensor Networks (WSNs). However, for simplicity, most existing researches ignore those characteristics in the designs of Compressive Sensing based Data Aggregation Schemes (CSDAS). Since conventional sparsification bases (e.g., DCT, Wavelets) are inefficient...
In heterogeneous networks (HetNets), small cells are overlaid within a large cell in order to increase capacity and coverage beyond the initial deployment of a large cell. Previous studies assumed that small cells are deployed only in the cell edge area of a large cell to support low-SINR users in that area. However, in a future communication environment, we need more small-cells to support much higher...
In increasingly popular participatory sensing systems, new challenges are arising to select the most appropriate participants when considering their hand-held smart device's different energy conditions, uncontrollable mobility pattern, and associated sensing capabilities to best satisfy the quality-of-information (QoI) requirements of sensing tasks. This paper proposes a QoI-aware energy-efficient...
The metrics used for evaluating energy saving techniques for future HPC systems are critical to the correct assessment of proposed methods. Current predictions forecast that overcoming reduced system reliability, increased power requirements and energy consumption will be a major design challenge for future systems. Modern runtime energy-saving research efforts do not take into account the energy...
In the last three decades, the information and communication technology (ICT) sector has been growing very fast. There is no such example in human history that development of a technology has changed our way of life in such a rapid and fundamental manner. ICT has become an integral part of our everyday life including social interactions, business processes, technology and ecology. Due to the fact...
The devices composing Wireless Sensor Networks (WSN) are very limited in terms of memory, processing power and battery. We need efficient routing algorithms to ensure a long lifetime of the WSN. However, many solutions focus on minimizing the average energy consumption of all the nodes. Since the lifetime is rather given by the death of the first node or by the disconnection of the network, these...
Device-to-device (D2D) communications as an underlay to cellular networks can not only increase the system capacity and energy efficiency, but it can also enable national security and public safety (NSPS) services. A key requirement is to provide access to cellular services when the network is available and maintain local communication in the (partial) absence of the infrastructure. In this paper...
Through virtualization, networks can be managed efficiently and securely. Energy-efficiency is one of the main challenges in networking environment. In this paper, an Adaptive Energy-aware Virtual Network Embedding Scheme (AE-VNE) based on traffic fitting is proposed to reduce the energy consumption of core nodes and links in network virtualization framework. An adaptive method to choose suitable...
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