A new class of wireless sensor networks that harvest power from the environment is emerging because of its intrinsic capability of providing unbounded lifetime. While a lot of research has been focused on energy-aware...
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A new class of wireless sensor networks that harvest power from the environment is emerging because of its intrinsic capability of providing unbounded lifetime. While a lot of research has been focused on energy-aware routing schemes tailored to battery-operated networks, the problem of optimal routing for energy harvesting wireless sensor networks (EH-WSNs) has never been explored. The objective of routing optimization in this context is not extending network lifetime, but maximizing the workload that can be autonomously sustained by the network. In this work we present a methodology for assessing the energy efficiency of routing algorithms for networks whose nodes drain power from the environment. We first introduce the energetic sustainability problem, then we define the maximum energetically sustainable workload (MESW) as the objective function to be used to drive the optimization of routing algorithms for EH-WSNs. We propose a methodology that makes use of graph algorithms and network simulations for evaluating the MESW starting from a network topology, a routing algorithm and a distribution of the environmental power available at each node. We present a tool flow implementing the proposed methodology and we show comparative results achieved on several routing algorithms. Experimental results highlight that routing strategies that do not take into account environmental power do not provide optimal results in terms of workload sustainability. Using optimal routing algorithms may lead to sizeable enhancements of the maximum sustainable workload. Moreover, optimality strongly depends on environmental power configurations. Since environmental power sources change over time, our results prompt for a new class of routing algorithms for EH-WSNs that are able to dynamically adapt to time-varying environmental conditions. (C) 2007 Elsevier B.V. All rights reserved.
I propose an integrated hybrid optical node ( i-HON) architecture that is designed to combine both packet-switched and circuit-switched data in an effective manner to maximize link utilization, minimize communication ...
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I propose an integrated hybrid optical node ( i-HON) architecture that is designed to combine both packet-switched and circuit-switched data in an effective manner to maximize link utilization, minimize communication latencies, and improve overall performance. I demonstrate the feasibility of i-HON by proposing a single wavelength optical header encoder and self-routing binary-encoded optical header address processing. I then develop dynamic hybrid routing heuristics and adapt these to the novel dynamic reconfiguration and routing algorithms suited for asynchronous bufferless optical networks that incorporate optical routing logic. I compare the performance of the presented algorithms. I use simulation results to show that i-HON provides overall system throughput performance improvements of up to 40% with similar to 50% reduction in network latency. (c) 2007 Optical Society of America.
Network-on-chip (NoC) architectures have been recently proposed as the communication framework for large-scale chips. The design of the routing system for the packet-switched on-chip network is one of the critical iss...
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ISBN:
(纸本)9780889868649
Network-on-chip (NoC) architectures have been recently proposed as the communication framework for large-scale chips. The design of the routing system for the packet-switched on-chip network is one of the critical issues for the success of NoC architectures. In this paper, we present the design of a reconfigurable pipelined switch for mesh on-chip networks. When the switch is in the regular mode for the regular mesh, the routing is equivalent to the XY routing. When there are faulty links or switches, the switch is reconfigured in irregular mode for faulty mesh networks. The routing decision hardware in the switch is efficiently implemented based on a simple distance calculation algorithm. Our switch design is validated by implementation of four different versions with 64-bit, 128-bit, 256-bit, and 512-bit links, respectively. Our results show that our routing decision can be efficiently realized with distance calculation hardware.
In recent years, there is a growing interest on the research and deployment of MANET(Mobile Ad Hoc Networks) technology for vehicular communication. routing is crucial to the success of VANET(Vehicular Ad hoc Networks...
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An algorithm on the network shortest path problem by gradually eliminating loops on a network is put forward. Using the wagon routing arrowhead line, we start from the origin, plot the routing arrowhead lines in the c...
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Reverse logistics is one of industries' activities that is still little known and developed. This paper analyses the necessities of collecting nonreturnable packaging at the point of sale, as well as their process...
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Reverse logistics is one of industries' activities that is still little known and developed. This paper analyses the necessities of collecting nonreturnable packaging at the point of sale, as well as their processing and sale to recycling companies, while considering marketing and operational variables for the reverse scheme. The objective is to increase the quality of recycling material by avoiding contamination and therefore, raising the quantity of recycled material used in the production of new packages. The pilot project analyses the operation of a brewery company in a medium-sized city in México. A collection system for non-returnable glass bottles and cans is designed by applying routing algorithms. Specifically a new "profitable algorithm" based on the well-known Nearest Neighbor is proposed and compared in order to achieve higher volume of collected material while lowering the cost of collection.
This paper is about the Research programs and technical framework of Internet of Things on Sensing Mine. It is discussed the convergence of mine backbone and mobile network, the routing protocols and algorithms, data ...
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3D IC technology enables NoC architectures to offer greater device integration and shorter interlayer interconnects. The primary 3D NoC architectures such as Symmetric 3D Mesh NoC could not exploit the beneficial feat...
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In this paper, a services application system will be designed base on the P2P overlay network. Through the use of the system, users can easily search for the services they need, and assembled the searched services int...
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Realism and simplicity of virtual experiment scene building can influence the usage of virtual educational experiment applications. This paper proposes an image based method of experiment scene building for Virtual Ed...
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