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Mobile ad-hoc network (MANET) is an energy constraint multi-hop network and its nodes have routing capability with limited battery power. In such a network, establishing a correct and efficient route is a crucial design issue. But a more challenging goal is to provide an energy-efficient multi-hop route between source-destination pair. Thus, the routing protocols should setup an energy-efficient route...
In this paper, aiming to reduce cellular network load, we propose a cooperative download method by which user terminals exchange fragments of a content called chunks through short-range wireless communication like Bluetooth or Wi-Fi with other user terminals who want the same content. In order to reduce the cellular network load, it is necessary to receive as many chunks as possible via short-range...
MapReduce has been adopted widely in both academia and industry to run large-scale data parallel applications. In MapReduce, each slave node hosts a number of task slots to which tasks can be assigned. So they limit the maximum number of tasks that can execute concurrently on each node. When all task slots of a node are not used, the resources âreservedâ for idle slots are unutilized...
The combined effect of Moore's law and the failure of Den nard scaling have led to multi-core mobile devices with immense computation capabilities. The biggest limitation of the computation capability for any mobile device is its battery. Mobile cloud computing is used to offload compute intensive tasks that affect a mobile device's battery. Mobile ad-hoc computing can be used as an alternative to...
Due to the oceanic climate and frequent earthquakes in Japan, bridge health diagnosis is a problem of greater complexity. In bridge diagnosis system, we develop a wireless sensor network to sample and gather the vibration data of bridge. Time synchronization is a crucial component for the wireless sensor network (WSN), because large populations of sensor nodes will collaborate in order to complete...
Nowadays, information and communication technology (ICT) has become more and more energy conscious. In this paper, we focus on peer-to-peer systems which contribute a major fraction of the Internet traffic. This paper proposes analytical models of energy consumption in P2P system. The model considers content pollution, the most common attack in P2P system, which has received little attention in previous...
Energy management in Smart Grids and Smart Homes will play a decisive role in future power system. Due to the rising decentralised power generation and its supply to the local grid, the individual households have to become more and more a participant in the Smart Market. Therefore approaches are presented for a framework to design and generate value-added services for management Smart Grids and Smart...
In wireless sensor networks, holes may exist due to uneven deployment, energy exhaustion and physical obstacles. How to establish the energy-efficient routing mechanism in wireless sensor networks with holes is a practical and challenging issues. Many researches employ hole detection algorithm to determine boundary nodes, and then the holes are covered by some virtual shapes such as circles and ellipses...
ZigBee is an industrial standard for low rate and low power wireless personal area networks. It is based on IEEE 802.15.4 physical and MAC layers. ZigBee defines the network layer to support multi-hop communication and routing between nodes. In ZigBee, tree routing is the simplest routing protocol with low-overhead in which parent-child links will be used for data transfer. In spite of this fact,...
In this paper we analyse the energy consumption of BitTorrent, the most popular Peer-to-Peer (P2P) application, over IP/WDM networks considering different peers behaviour scenarios. We show, by mathematical modelling and simulation, that leechers can cause high network energy consumption if they leave the network after finishing downloading. We introduce an energy efficient approach to compensate...
A key aspect of a wireless sensor network is its ability to self-organize and maintain connectivity. Medium Access Control (MAC) protocol manages network self-configuration, which includes establishing a personal area network (PAN), finding a network to associate or disassociate with, and synchronizing if required. Currently, there is limited research that addresses the network initialization phase...
In this demonstration paper, we present a novel framework for searching objects (e.g., images, videos, etc.) captured by the users in a mobile social community. Our framework, is founded on an in-situ data storage model, where captured objects remain local on their owners smartphones and searches then take place over a novel lookup structure we compute dynamically. Initially, a query user invokes...
Wireless traffic that is destined for a certain device in a network, can be exploited in order to minimize the availability and delay trade-offs, and mitigate the Energy consumption. The Energy Conservation (EC) mechanism can be node-centric by considering the traversed nodal traffic in order to prolong the network lifetime. This work describes a quantitative traffic-based approach where a clustered...
Cloud services make use of data center resources so that hosted applications can utilize them as needed. To offer a large amount of computational resources, cloud service providers manage tens of geographically distributed data centers. Since each data center is made up of hundreds of thousands of physical machines, energy consumption is a major concern for cloud service providers. The electric cost...
This paper proposes LBA, a lifetime balanced data aggregation scheme for asynchronous and duty cycle sensor networks under an application-specific requirement of end-to-end data delivery delay bound. In contrast to existing aggregation schemes that focus on reducing the energy consumption and extending the operational lifetime of each individual node, LBA has a unique design goal to balance the nodal...
Wireless sensor network (WSN) consists of tiny sensor nodes with sensing, computation and wireless communication capabilities. Now days, it is finding wide applicability and increasing deployment, as it enables reliable monitoring and analysis of environment. The design of routing protocols for WSN is influenced by many challenging factors like fault tolerance, energy efficiency, scalability, latency,...
Numerous studies have shown that datacenter networks typically see loads of between 5% – 25% but the energy draw of these networks is equal to operating them at maximum load. In this paper, we propose a novel way to make these networks more energy proportional - that is, the energy draw scales with the network load. We propose the idea of traffic aggregation, in which low traffic from N links is combined...
In wireless sensor networks (WSNs), the nodes are usually powered by batteries with limited capacities, which has become one of the main challenges to the wide deployment of WSN-based applications. The overall network lifetime, which is usually determined by the node with the shortest lifetime because of the unbalanced energy consumption, becomes a major issue. Aiming at this, we consider the optimization...
A novel Distributed Spectrum-Aware Clustering (DSAC) scheme is proposed in the context of Cognitive Radio Sensor Networks (CRSN). DSAC aims at forming energy efficient clusters in a self-organized fashion while restricting interference to Primary User (PU) systems. The spectrum-aware clustered structure is presented where the communications consist of intra- cluster aggregation and inter-cluster relaying...
In order to mitigate the greenhouse effects and reduce environmental pollution, energy saving has become an important issue in designing the next generation Internet. Shutting down the network devices carrying light loads and redirecting their traffic flows to other routes is a way to decrease energy consumption. An energy efficient network has to dynamically determine the optimal active links to...
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