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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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CLIQUE: Role-Free Clustering with Q-Learning for Wireless sensor Networks

CLIQUE: Role-Free Clustering with Q-Learning for Wireless Se...

引用

ieee international conference on distributed computing systems

作者： Anna Forster Amy L. Murphy Faculty of Informatics Universita della Svizzera Italiana Via G.Buffi 13 6900 Lugano Switzerland FBK-IRST Via Sommarive 18 38050 Povo TN Italy

ISBN: (纸本)9781424444816

Clustering and aggregation inherently increase wireless sensor network (WSN) lifetime by collecting information within a cluster at a cluster head, reducing the amount of data through computation, then forwarding it. Traditional approaches, however, both spend extensive communication energy to identify the cluster heads and are inflexible to network dynamics such as those arising from sink mobility, node failure, or dwindling battery reserves. This paper presents CLIQUE, an approach for data clustering that saves cluster head selection energy by using machine learning to enable nodes to independently decide whether or not to act as a cluster head on a per-packet basis. We refer to this lack of actual cluster head assignment as being role-free, and demonstrate through simulations that, when combined with learning dynamic network properties such as battery reserves, up to 25% less energy is consumed in comparison to a traditional, random cluster head selection approach.

关键词： cluster head Wireless sensor networks Batteries Cluster Analysis

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Energy-Optimal Grid-Based Clustering in Wireless Microsensor Networks

Energy-Optimal Grid-Based Clustering in Wireless Microsensor...

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international conference on distributed computing systems Workshop

作者： Yanyan Zhuang Jianping Pan Guoxing Wu Department of Computer Science University of Victoria Victoria BC Canada School of Computer Science South-East University Nanjing Jiangsu China

Wireless microsensor networks usually consist of a large number of small sensor nodes with limited onboard energy supply and deployed densely in a given area for information harvesting purposes. To reduce energy consumption and prolong network lifetime, clustering techniques are often used, among which the grid-based ones are very popular due to their simplicity and scalability. In this paper, we analyze and evaluate the energy-optimal grid size for a grid-based clustering and routing scheme proposed specifically for wireless microsensor networks. Through numerical and simulation results, we reveal the tradeoff generic to all grid-based clustering schemes. In addition, we propose a randomized technique to further prolong the network lifetime and discuss other energy-saving opportunities. This paper provides some insights into the intrinsic limits of grid-based clustering schemes for wireless micro sensor networks.

关键词： Microsensors Wireless sensor networks Energy consumption Routing Computer science Scalability Numerical simulation Energy conservation Propagation losses Energy efficiency

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Wireless Mesh Networks for Meteorological Monitoring

Wireless Mesh Networks for Meteorological Monitoring

引用

international conference on distributed computing systems Workshop

作者： Torsten Braun University of Bern Switzerland

Wireless mesh networks can be used for various applications such as extending the coverage of wireless networks or connecting remote users to the Internet. By using wireless mesh networks for interconnecting meteorological weather stations to the Internet, multi-media sensor data can be observed in real-time. In such an application scenario, the wireless multi-hop network must fulfill high application requirements in terms of reliability, delay, and bandwidth. The exploitation of diversity mechanisms based on multiple paths seems to be a promising approach. The talk will present implementation experiences with wireless multi-path transmission and deployments of wireless mesh networks in out-door scenarios to interconnect remote weather stations with the Internet. Moreover, an evaluation and test environment for wireless mesh network implementations based on emulation and simulation to model realistic wireless channel conditions will be presented. The talk concludes with a discussion on how cognitive networking concepts can help to achieve the application requirements mentioned above.

关键词： Wireless mesh networks Meteorology IP networks Wireless sensor networks Remote monitoring Joining processes Spread spectrum communication Bandwidth Testing Emulation

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Event ordering in pervasive sensor networks

Event ordering in pervasive sensor networks

引用

ieee international conference on Pervasive computing and Communications (PerCom)

作者： Lakshman Kaveti Sandeep Pulluri Gurdip Singh Computing and Information Sciences Kansas State University Manhattan KS USA

In a pervasive sensor system, application entities may use the available infrastructure resources such as sensing devices, actuators, wireless modules and gateways to accomplish various tasks. For example, a group of humans/robots may use the infrastructure to track the current location of the group members. Many such tasks require a service which keeps track of the order of occurrence of events in the application. Existing algorithms for this problem have been designed for traditional distributed systems using the layering paradigm where the algorithm is able to observe and intercept application messages. Pervasive applications, however, may not be structured as strictly layered systems. In this paper, we study the problem of event ordering in pervasive systems, and propose algorithms for detecting event ordering. Our first algorithm treats the entire network as a single graph, whereas the second algorithm operates in a hierarchical manner by subdividing the network into smaller groups. We present experimental evaluation of our algorithms using both simulation and deployment on a sensor testbed.

关键词： Clocks Synchronization sensor phenomena and characterization Wireless sensor networks Humans Robot sensing systems Algorithm design and analysis Event detection Monitoring Protocols

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Intelligent distributed architecture (IDA) for mobile sensor data fusion

Intelligent distributed architecture (IDA) for mobile sensor...

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2009 ieee/RSJ international conference on Intelligent Robots and systems

作者： John Meier Burchan Bayazit Department of Computer Science and Engineering Washington University of Saint Louis Saint Louis MO USA

In this paper, we provide a new two-layer scalable architecture, intelligent distributed architecture (IDA). The first layer of IDA, the application layer, is responsible for the mission specific tasks. The second layer, the network layer, is responsible for relaying the information quickly to reduce latency. In order to increase efficiency, we propose an intelligent network layer that evaluates the network traffic through application provided policies. The evaluation assesses improved accuracy in bandwidth limited scenarios. IDA policies permit the application to drop, merge or modify the packets in real time from different sources. We demonstrate how this architecture can be applied to an example application, distributed target tracking. We also propose some new algorithms that can be used in conjunction with IDA for target tracking. Our experiments on this application show that IDA improves system performance when the bandwidth is limited.

关键词： Intelligent sensors sensor fusion Bandwidth Target tracking Computer architecture Intelligent robots USA Councils Wireless sensor networks Mobile computing sensor systems

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A Memory Efficient Algorithm for Real Time Object Counting

A Memory Efficient Algorithm for Real Time Object Counting

引用

ieee international Advance computing conference, IACC

作者： S. Subramanian L. V. Bhadrinarayana Mechanical Engineering Department Birla Institute of Technology and Science Pilani India Electrical and Electronics Engineering Department Birla Institute of Technology and Science Pilani India

Object Counting is a challenging problem with different solutions based on the available computing power and the nature of data to be processed. Memory efficiency, simplicity and speed are very important requisites for algorithms to be used in modern day systems which include distributed systems and wireless sensor networks where it is extremely advantageous to do basic preprocessing of data from the sensors in the nodes itself. Reduced computing power available in the nodes poses a challenge and this can be overcome by the use of algorithms with simple steps. We present an algorithm to monitor continuity, count objects and measure parameters such as area by isolating patterns and objects from data based on simple computations. Memory efficiency, speed and flexibility of the proposed algorithm have been discussed. It has many broad applications that include counting objects on a conveyer, monitoring people in a traffic signal, pattern isolation from multicolored images and monitoring continuity in real time image data from sensors. We describe the experimental setup used to implement this algorithm.

关键词： sensor arrays Wireless sensor networks Monitoring Biomass Data engineering Power engineering and energy Mechanical engineering Power engineering computing sensor systems Computer networks

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Energy Efficient distributed Connected Coverage Algorithms with Dynamic Coverage Maintenance in Wireless sensor Networks

Energy Efficient Distributed Connected Coverage Algorithms w...

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ieee international Advance computing conference, IACC

作者： M. Senthamilselvi N. Devarajan Sri Ramakrishna Engg College Anna University Chennai India Government College of Technology Coimbatore Tamil Nadu IN

A combined algorithm is required to select an optimal set of sensors, satisfying the conditions of coverage and connectivity. Since topological changes have significant impact on the coverage quality, there is a need for dynamic coverage maintenance algorithms. In this paper, an energy efficient distributed connected coverage (EEDCC) algorithm and a set of dynamic coverage maintenance (DCM) algorithms have been proposed. EEDCC aims to reduce the energy consumption with a lower communication overhead. The DCM algorithms aid in the tracking of changes in network topology thereby addressing the issues related to dynamic coverage and loss recovery. These algorithms would assist in the adaptive maintenance of the coverage either by migrating sensor node or by updating the radii accordingly. Simulations results show that the EEDCC-DCM algorithms attain significant reduction of energy, with strong connectivity and coverage.

关键词： Energy efficiency Heuristic algorithms Wireless sensor networks Intelligent sensors sensor phenomena and characterization sensor systems and applications Educational institutions Wireless communication Condition monitoring Space technology

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TDMA-ASAP: sensor Network TDMA Scheduling with Adaptive Slot-stealing And Parallelism

TDMA-ASAP: Sensor Network TDMA Scheduling with Adaptive Slot...

引用

ieee international conference on distributed computing systems

作者： Sameh Gobriel Daniel Mosse Robert Cleric Intel Communications Technology Lab University of Pittsburgh

ISBN: (纸本)9781424444816

TDMA has been proposed as a MAC protocol for wireless sensor networks (WSNs) due to its efficiency in high WSNload. However, TDMA is plagued with shortcomings;we present modifications to TDMA that will allow for the same efficiency of TDMA, while allowing the network to conserve energy during times of low load (when there is no activity being detected). Recognizing that aggregation plays an essential role in WSNs, TDMA-ASAP adds to TDMA: (a) transmission parallelism based on a level-by-level localized graph-coloring, (b) appropriate sleeping between transmissions ("napping"), (c) judicious and controlled TDMA slot stealing to avoid empty slots to be unused and (d) intelligent scheduling/ordering transmissions. Our results show that TDMA-ASAP's unique combination of TDMA, slot-stealing, napping, and message aggregation significantly outperforms other hybrid WSN MAC algorithms and has a performance that is close to optimal in terms of energy consumption and overall delay.

关键词： time division multiple access Synclitism energy consumption MAC protocol Methotrexate-Actinomycin-Chlorambucil Regimen Napping parallelism

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Actor Positioning in Wireless sensor and Actor Networks Using Matching Theory

Actor Positioning in Wireless Sensor and Actor Networks Usin...

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international conference on distributed computing systems Workshop

作者： Ismail Guneydas Kemal Akkaya Ali Bicak Department of Computer Science Southem Illinois University Carbondale Carbondale IL USA Department of Information Technology & Management Science Marymount University Arlington VA USA

In most of the wireless sensor and actor network (WSAN) applications, the locations for the actors are determined autonomously by the collaboration of actors and/or sensors in order to eliminate human intervention as much as possible. Particularly, sensors can collaborate in a distributed manner and elect cluster-heads (CHs) among them based on certain criteria. The actors can then move to such CH locations by talking to nearby sensors/actors. Such movement, however, should be done wisely in order to minimize the movement distance of actors so that their lifetimes can be improved. Nevertheless, this may not be possible since not all the actor and CH locations will be known by each actor. In addition, the actors may not be reachable to each other and thus conflicts in assignments can easily occur. In this paper, we propose an actor-CH location matching algorithm which will assign the actors to appropriate CH locations in a distributed manner with minimized travel distance. We adapt the Gale-Shapley (G-S) stable matching algorithm from matching theory in order to prevent conflicts in matching and minimize the travel distance of actors. In this matching algorithm, actors are regarded as men and CHs are regarded as women. For distributed execution of the algorithm, subnetworks of actors and CHs are determined. Each subnetwork performs its own matching based on G-S *** there are unmatched actors after this process, a network wide search is used to detect such nodes and to perform the matching. We evaluated the performance of our approach through simulation and have shown that our approach can produce results very close to the brute force approach with minimal messaging overhead.

关键词： Wireless sensor networks distributed computing sensor systems and applications USA Councils Humans Collaboration Underwater tracking Monitoring conferences Computer science

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