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In order to optimize power consumption in the network, techniques to adjust the link capacity to the demand has been proposed recently. These techniques are known as Adaptive Link Rate (ALR). This paper proposes that is feasible to establish an appropriate link rate to transport one or more flows efficiently, in terms of power consumption without impacting performance, in a network with a limited...
Growing demands for mobile services in recent years has extraordinary increased the number of cellular operators and consequently the portion of energy that is consumed by cellular networks. Hence, green cellular network has been introduced, which suggests the use of energy optimization methods in cellular networks. One of the solutions to optimize the energy consumption of cellular networks is to...
The distinguishing feature of the Fog Computing (FC) paradigm is that FC spreads communication and computing resources over the wireless access network, so as to provide resource augmentation to resource and energy-limited wireless (possibly mobile) devices. Since FC would lead to substantial reductions in energy consumption and access latency, it will play a key role in the realization of the Fog...
This paper introduces a study of the fog computing suitability assessment as a solution for the increasing demand of the IoT devices. In particular, we focus on the energy consumption and the Quality of Service (QoS) as two important metrics of the performance of the fog. Therefore, we present a modeling of these two metrics in the fog. Then, we express the problem as constrained optimization and...
Wireless Sensor Networks (WSNs) have gained significant attention due to their wide range of applications. In these networks, the sensor nodes collect different types of data from the surrounding environment. There are many applications that require sensor node to transmit urgent data packets faster than normal data packets. In the literature, most of the available medium access control (MAC) protocols...
Optical Wavelength Division Multiplexing (WDM) networks based on fixed grid technology have exposed some questions, including wasting of bandwidth resources in multi-domain heterogeneous networks. Flexible grid technologies can provide end-to-end optical path according to the client flexibly and effectively. However, it is unpractical to deploy a one-time green-field flexible grid technologies subjected...
The designers of computing systems have interested on the improvements of computing performance that are driven by the demand of consumer, business, and scientific applications. However, further growth of computing performance has started to be limited due to the increasing energy consumption of cloud data centres as a result of carbon dioxide footprints and overwhelming electricity bills. Therefore,...
At present, the energy consumption of wireless communication network accounts for the vast majority of the operator's expenses. A cooperative energy saving mechanism is proposed in the framework of the self-organized network, based on the hybrid energy supplied, aiming at the energy consumption of cellular is too large and the utilization rate of green energy is low. According to the framework, the...
Reducing power and energy consumption in large scale networks remains a challenging problem. The increasing need to support multimedia applications in future Internets further compound this problem. This paper addresses a key issue of how to efficiently assign per-router flow delays and set per-processor execution speeds, along a routing path, to jointly minimize energy consumption and meet end-to-end...
Hybrid Clouds couple the scalability of public Clouds with the greater control supplied by private ones. Hybrid Cloud Brokers support customers in selecting the most suitable providers' offers, optionally adding the provisioning of dedicated services with higher Quality of Service (QoS) levels. A clear evaluation of the benefits on performance and energy savings brought about by any allocation strategy...
Virtualization is an important feature for cloud computing which has recently attracted considerable attention. In this work, we de-sign an energy efficient approach which aims to minimize the energy consumption without reducing the Quality of Service (QoS) for user’s deadline requirements in cloud data centers. We also propose a VM re-placement algorithm for QoS and energy-awareness in cloud data...
Software-defined networking (SDN) is expected to dramatically simplify network control process, enable the convenient deployment of sophisticated networking functions, and support user applications with guaranteed quality of service (QoS). To achieve data packet transmission between two switches in SDN, efficient routing algorithms should be applied. In this paper, we study joint routing selection...
The main goal of this paper is to manage the switching on/off of servers in a data center during time to adapt the system with incoming traffic changes to ensure a good performance and a reasonable energy consumption. In this work, the system is modeled by a queue then, an optimization algorithm is designed to manage energy consumption and quality of service in the data center. For several systems,...
Nowadays, there is a big increase in the usage ofdata analytic applications and services because of the growth inthe data produced from many different sources. The QoSproperties such as response time, reliability and latency of theseservices are important factors to decide which services to select.As we know, the energy consumption is becoming a big issue as aresult of IT expansion. Therefore, establishing...
Conventional planning and optimization of cellular networks for supporting the peak-time user demand leads to substantial wastage of electrical energy. Therefore, we propose an energy-aware dynamic network provisioning framework for realizing green mobile cellular systems by reducing energy consumption in access networks. Proposed mechanism allows base stations (BSs) to offload their entire traffic...
One important aspect that needs to be carefully considered in maritime operations using unmanned robotic vehicles is the communication restrictions between the vehicles and the mission controller that arises mainly due to long distances and/or low power transmissions. This paper addresses the problem of maintaining a communication link between a command station and an Unmanned Aerial Vehicle (UAV)...
With the growing energy demands from server farms, it becomes necessary to understand the tradeoffs between energy consumption and application performance. Typically, server farms are provisioned for peak load even when they are mostly operating at low utilization levels. This results in wasteful energy consumption. At the same time, application workloads have Quality of Service (QoS) constraints...
A Wireless Sensor Network (WSN) is a network of thousands of low-cost sensors which have a limited operating lifetime. A sensor node generally comprises four basic elements, including a transceiver unit, a detection unit, a processing unit, and an energy supply unit. One of the major challenges in the WSN is to increase the network life-time. Since the transmitting/receiving unit has the highest energy...
Performance tradeoffs in resource provisioning for mixed internet-of-things (IoT) and human-oriented-communications (HoC) services over cellular networks are investigated. First, we present a low-complexity model of cellular connectivity in the uplink direction in which both access reservation and scheduled data transmission procedures are included. This model is employed subsequently in deriving...
Energy harvesting (EH) is considered to be the key enabling technology for the mass deployment of wireless sensor networks (WSNs) for Internet of Things (IoT) applications. Efficient EH techniques could remove the needs of frequent energy source replacement, thus offering a near perpetual network operating environment. Advances in EH techniques have shifted the design of routing protocols for EH-WSN...
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