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Energy Efficient Search in sensor Networks Using Simple Random Walks with Level Biased Steps

Energy Efficient Search in Sensor Networks Using Simple Rand...

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international conference on distributed computing systems Workshop

作者： Kiran K. Rachuri C. Siva Ram Murthy Indian Institute of Technology Madras Chennai India

Random walk is one of the widely used techniques for information discovery in unstructured networks like ad hoc wireless networks (AWNs) and wireless sensor networks (WSNs). In a random walk, instead of taking all steps uniform randomly, our idea is to modify random walk to take some level biased steps to improve its energy efficiency and latency which are important design parameters in WSNs. the level of a node is defined as the minimum number of hops required for a packet to reach the sink node from that node. We propose two walk based search protocols viz., several short random walks (SSRW) search and random walk with level biased jumps (RWLBJ) search, that use a combination of uniform random and level biased steps for energy efficient search in WSNs. the idea is that the biased steps in the proposed protocols decrease the correlation among visited sensor nodes which increases the node coverage of the protocols. We show by theoretical analysis that using biased steps in random walks increases their efficiency in terms of energy consumption and latency of search. We also show by extensive simulations that SSRW and RWLBJ are better choices compared to that of pure random walk in terms of the energy consumption and latency of search.

关键词： Energy efficiency Wireless sensor networks Delay Protocols Energy consumption Temperature sensors Query processing distributed computing conferences sensor systems

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Surviving holes and barriers in geographic data reporting for Wireless sensor Networks

Surviving holes and barriers in geographic data reporting fo...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Yangfan Zhou Michael R. Lyu Jiangchuan Liu Department of Computer Science & Engineering Chinese University of Hong Kong Sha Tin Hong Kong China School of Computing Science Simon Fraser University Burnaby BC Canada

ISBN: (纸本)9781424451142

Geographic forwarding is a favorable scheme for data reporting in wireless sensor networks (WSNs) due to its simplicity and low-overhead. However, WSNs are usually subject to complicated environmental factors. Network holes (i.e., the areas where no nodes inside) and barriers (i.e., those blocking the communication between two close nodes) are inevitable in practical deploying environments. these issues pose an obstacle to adopting geographic forwarding in WSNs, while current approaches lack an efficient method to tolerate such negative factors. In this paper we specifically tailor a waypoint-based geographic data reporting protocol (GDRP) for WSNs. Inherited from geographic forwarding, GDRP is light-weighted and hence well-suits WSNs. But unlike current approaches that often find suboptimal paths, GDRP adopts an intelligent strategy to select a best set of waypoints via which packets can efficiently circumvent holes and barriers, and it can thus find better paths. Extensive simulations are conducted to verify the advantages of GDRP in tolerating network holes and obstacles in WSNs.

关键词： Wireless sensor networks Protocols Computer science Data engineering Computer networks Environmental factors Intelligent sensors Monitoring Scalability Large-scale systems

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Energy-efficient task allocation for data fusion in Wireless sensor Networks

Energy-efficient task allocation for data fusion in Wireless...

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international conference on Mobile and Ubiquitous systems: Networking and Services (MobiQuitous)

作者： Li Zhigang Li Shining Zhou Xingshe Yang Zhiyi School of Computer Northwestern Polytechnical University Xi'an China

Data fusion or In-network processing methods were often adopted in Wireless sensor Networks (WSNs) to reduce data communication and prolong network lifetime, which made WSNs application can be described as a set of tasks (sensing, processing) and dependencies among them. Task assignment has become an important problem which needed to be resolved for different tasks assignment caused different energy consumption. Based on the task graph of WSNs, an energy-efficient task assignment framework was proposed. As application task can be decomposed into sensing subtasks and processing subtasks, we present the task assignment as sensing subtask assignment and processing subtask assignment. We formulate the processing subtask assignment as a 0-1 quadratic programming problem and evaluate it through experiments.

关键词： Energy efficiency Wireless sensor networks sensor phenomena and characterization Resource management Energy consumption sensor fusion Computer networks Wireless communication distributed computing Telecommunication traffic

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XLSEC - A distributed Cross-Layer Framework for Security in Wireless sensor Networks

XLSEC - A Distributed Cross-Layer Framework for Security in ...

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Consumer Communications and Networking conference, CCNC ieee

作者： G. thamilarasu R. Sridhar State University of New York University at Buffalo Buffalo NY USA

In this work, we addressed the need for cross-layer optimizations in wireless security. We proposed a cross-layer security framework with interactions across layer boundaries (vertical optimization) as well as node boundaries (horizontal optimization). We modeled different attacks at the network layer and application layer to illustrate the detection performance of the XLSEC framework. Preliminary simulation results indicate high detection gains using such cross-layer adaptations.

关键词： Wireless sensor networks Information security Communication system security Wireless application protocol Collaborative work Communication system control Protection ZigBee sensor systems Control systems

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MapReduce as a general framework to support research in Mining Software Repositories (MSR)

MapReduce as a general framework to support research in Mini...

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international Mining Software Repositories, MSR

作者： Weiyi Shang Zhen Ming Jiang Bram Adams Ahmed E. Hassan Software Analysis and Intelligence Laboratory (SAIL Queen''s University Kingston Canada

ISBN: (纸本)9781424434930

Researchers continue to demonstrate the benefits of Mining Software Repositories (MSR) for supporting software development and research activities. However, as the mining process is time and resource intensive, they often create their own distributed platforms and use various optimizations to speed up and scale up their analysis. these platforms are project-specific, hard to reuse, and offer minimal debugging and deployment support. In this paper, we propose the use of MapReduce, a distributed computing platform, to support research in MSR. As a proof-of-concept, we migrate J-REX, an optimized evolutionary code extractor, to run on Hadoop, an open source implementation of MapReduce. through a case study on the source control repositories of the Eclipse, BIRT and Datatools projects, we demonstrate that the migration effort to MapReduce is minimal and that the benefits are significant, as running time of the migrated J-REX is only 30% to 50% of the original J-REX's. this paper documents our experience with the migration, and highlights the benefits and challenges of the MapReduce framework in the MSR community.

关键词： Linux Workstations Software performance Software systems Data mining Programming Debugging distributed computing Kernel Scalability

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A mobility and congestion resilient data management system for distributed mobile networks

A mobility and congestion resilient data management system f...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Ze Li Haiying Shen Department of Electrical and Computer Engineering Clemson University Clemson SC USA

ISBN: (纸本)9781424451142

Data sharing is one of the most popular applications that dominate 70% of data traffic on the Internet. this application has been penetrating wireless mobile networks with dramatic speed, which allows the sharing of data whenever and wherever. However, traditional client-server data sharing model suffers from single point failure and low-scalable transmission in a highly dense and dynamic scenario. MANET is a promising alternative structure for flexible and distributed data sharing. However, the topology-based flooding employed in MANETs for data routing and querying prevents the data sharing system from achieving high scalability and robustness. Building a DHT on a MANET reduces data query overhead, but the inconsistency between the overlay and the underlying topology degrade system's performance. Geographic routing based data sharing in MANETs reduces the data routing overhead. However, it has more requirements (e.g. GPS) on the nodes. this paper presents a locality-based distributed data sharing system (LORD) for mobility and congestion resilient data management. LORD consists of a DHT-based data index and retrieval protocol and a locality-aware region-based data routing protocol. It provides highly efficient, scalable and dynamism-resilient data sharing with low overhead. Moreover, it offers similarity data searching function. theoretical analysis and simulation results show the superiority of LORD compared with other data sharing systems in terms of scalability, overhead and dynamism-resilience in a highly dense and dynamic MANET.

关键词： Mobile ad hoc networks Scalability Routing protocols Telecommunication traffic Traffic control Internet Robustness Buildings Topology Degradation

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An analytical study of subdividing hexagon-clustered WSN for power saving

An analytical study of subdividing hexagon-clustered WSN for...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Dajin Wang Department of Computer Science Montclair State University Upper Montclair NJ USA

ISBN: (纸本)9781424451142

Hexagon is an ideal shape for clustering sensor networks, for it can seamlessly divide clustered areas, and is the largest regular polygon (in terms of the number of sides) that has this property. In this paper, we analyze the benefit of subdividing a hexagonal cluster for the purpose of reducing the overall power consumption in the cluster. Assuming a spatial Poisson distribution of sensor nodes in the cluster, we propose a subdivision scheme, and perform a comprehensive analytical estimate of power savings brought about by the subdivision. the analytical results show that subdivision will yield considerable saving in overall power consumption of the cluster, and the saving is heavily dependent on the nodes' transmission range and their deployment density. the limit on the depth of subdivision is also analyzed.

关键词： Wireless sensor networks

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Message Sending Method Using Patients' Priority for Medical sensor Network

Message Sending Method Using Patients' Priority for Medical ...

引用

international conference on distributed computing systems Workshop

作者： Hiromitsu Tomozawa Kiyoshi Oguchi Hiroshi Shigeno Kenichi Okada Keio University Yokohama Kanagawa Japan Keio University JST Yokohama Kanagawa Japan

Aid supporting systems for emergency cases to collect patientspsila medical data such as their conditions, blood pressure and so on real-time are developing recently. Part of them form sensor network and collect patientspsila medical data. Among data,there are important data needed to be sent immediately. However, sending the data with unicast has problem about loss at midstream of the path. On the other hand,flooding the data makes amount of traffic too huge which oversaturates the bandwidth. For sending the data certainly, it is required to keep traffic low and path diversity large. In this paper, we propose emergent messages ending method, EMPaD, enlarging path diversity and keeping the amount of traffic low. Using simulations, we evaluate the proposal, and results show that our proposal enlarges path diversity while traffic is kept low.

关键词： Floods Unicast Telecommunication traffic Layout Traffic control Relays Broadcasting Blood pressure Proposals Intelligent sensors

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A Novel Asynchronous, Energy Efficient, Low Transmission Delay MAC Protocol for Wireless sensor Networks

A Novel Asynchronous, Energy Efficient, Low Transmission Del...

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international conference on distributed computing systems Workshop

作者： Saeed Rashwand Jelena Misic Vojislav Misic Subir Biswas Md Mahbubul Haque Department of Computer Science University of Manitoba Winnipeg Canada

Wireless sensor networks use battery-operated computing and sensing devices. It is often impractical or even impossible to charge/replace the exhausted batteries of the nodes. thus, energy consumption is the main concern in a wireless sensor network. Moreover, a critical event detected by the sensor network should be delivered to the user as soon as possible. thus, for sensor networks, both energy efficiency and transmission latency are important parameters. In this paper, we propose a novel asynchronous, duty cycled, energy efficient, and low transmission delay for wireless sensor networks, which addresses all the sources of energy waste to make the medium access more energy efficient, while keeping transmission delay *** currently available asynchronous contention-based MAC protocols require that proper strategies for sender and receiver nodes are provided to rendezvous. However, the proposed protocol does not rely on any rendezvous between sender and receiver. For evaluating the novel MAC protocol, we have simulated this protocol and two very efficient and established MAC protocols, RTS/CTS ieee 802.11 and S-MAC. the simulation results indicate that the proposed protocol has very good performance. In addition, as the results show, the novel protocol provides a very suitable balance between energy efficiency and transmission delay.

关键词： Energy efficiency Media Access Protocol Wireless application protocol Wireless sensor networks Access protocols Delay Computer networks Batteries Energy consumption Event detection

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DMRC: Distortion-minimizing rate control for Wireless Multimedia sensor Networks

DMRC: Distortion-minimizing rate control for Wireless Multim...

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ieee Internatonal conference on Mobile Adhoc and sensor systems (MASS)

作者： Scott Pudlewski Tommaso Melodia Wireless Networks and Embedded Systems Laboratory Department of Electrical Engineering State University of New York Buffalo USA

ISBN: (纸本)9781424451142

the availability of inexpensive CMOS cameras and microphones that can ubiquitously capture multimedia content from the environment is fostering the development of Wireless Multimedia sensor Networks (WMSNs), i.e., distributed systems of wirelessly networked devices that can retrieve video and audio streams, still images, and scalar sensor data. WMSNs require the sensor network paradigm to be re-thought in view of the need for mechanisms to deliver multimedia content with a pre-defined level of quality of service (QoS). A new rate control scheme for WMSNs is introduced in this paper with a two-fold objective: i) maximize the video quality of each individual video stream; ii) maintain fairness in video quality between different video streams. the rate control scheme is based on both analytical and empirical models and consists of a new cross-layer control algorithm that jointly regulates the end-to-end data rate, the video quality, and the strength of the channel coding at the physical layer. the end-to-end data rate is regulated to avoid congestion while maintaining fairness in the domain of video quality rather than data rate. Once the end-to-end data rate has been determined, the sender adjusts the video encoder rate and the channel encoder rate based on the overall rate and the current channel quality, with the objective of minimizing the distortion of the received video. Simulations show that the proposed algorithm considerably improves the received video quality without sacrificing fairness.

关键词： Wireless sensor networks Rate distortion theory Streaming media CMOS image sensors Multimedia systems sensor systems Quality of service Cameras Microphones Information retrieval

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