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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd"> <html lang="en"><head><title>OPNET University Program</title> <style type="text/css"> div.paper { margin-top: 40pt; border-width: 1px 1px 1px 1px; border-color: black; border-style: solid; padding: 10pt 10pt 10pt 10pt } h2.paper_title { font-size: 20pt; display: inline } span.conference_name { font-style: italic } h2.abstract { font-size: 150% } div.abstract_description { } </style></head><body alink="#000099" bgcolor="#ffffff" link="#000099" vlink="#000099"> <table summary="" border="0" cellpadding="0" cellspacing="0" width="100%"> <tbody><tr> <td width="1%"> <img src="%ATTACHURLPATH%/spacer01a.gif" alt="spacer01a.gif" width='71' height='46' /> <!-- <img alt="" src="images/spacer01a.gif" height="46" width="20"> --> </td> <td colspan="2" align="left" valign="top"><a href="http://www.opnet.com/university_program/index.html%20"> <!-- %<img alt="" src="images/university_title_1.GIF" border="0" height="195" width="790"> --> <img src="%ATTACHURLPATH%/university_title_1.GIF" alt="university_title_1.GIF" width='790' height='195' /> </a></td> <td width="19%"> </td> </tr> </tbody></table> <table summary="" border="0" cellpadding="0" cellspacing="0" width="96%"> <tbody><tr align="left" valign="top"> <td height="510" width="1%"> <!-- <img alt="" src="images/spacer01a.gif" height="46" width="16"> --> <img src="%ATTACHURLPATH%/spacer01a.gif" alt="spacer01a.gif" width='71' height='46' /></td> <td align="center" height="510" valign="top" width="22%"> <p> <!-- <img alt="" src="images/spacer01.gif" height="13" width="261"> --> <img src="%ATTACHURLPATH%/spacer01a.gif" alt="spacer01a.gif" width='71' height='46' /><br> <a href="http://www.opnet.com/"> <!-- <img alt="" src="images/opnet.jpg" border="0" height="48" width="172"> --> <img src="%ATTACHURLPATH%/opnet.jpg" alt="opnet.jpg" width='172' height='48' /> </a></p> <p><font size="2">OPNET Technologies<br> 7255 Woodmont Avenue<br> Bethesda, MD 20814<br> Tel: 240-497-3000<br> Fax: 240-497-3001<br> E-mail: <a href="mailto:university@opnet.com">university@opnet.com</a><br> Web: <a href="http://www.opnet.com/" target="_blank">www.opnet.com</a><br> </font></p> <p><font size="2">© 2008 OPNET Technologies, Inc.<br> OPNET and OPNET Technologies Inc.<br> are registered trademarks of OPNET.<br> All trademarks are the property of their<br> respective owners and are used herein<br> for identification purposes only.</font></p> </td> <td align="left" height="510" valign="top" width="61%"> <p><b> <!-- <img alt="" src="images/spacer01.gif" height="12" width="736"> --> <img src="%ATTACHURLPATH%/spacer01a.gif" alt="spacer01a.gif" width='71' height='46' /></b> <!-- <br><strong><br></strong></p><strong></strong> --> </p> <p><b> University: <a href="http://www.uniroma1.it"> "Sapienza" University of Rome</a><br> Name of Sponsoring Professors: <a href="http://twiki.di.uniroma1.it/twiki/view/Users/AnnalisaMassini">Annalisa Massini</a><br> Department: <a href="http://w3.uniroma1.it/dipinfo">Computer Science</a></b> </p> <br> <!--</b></p> --> <center><font color="#666666"><font size="+2">OPNET Simulation Software Tool Usage at </font></font></center> <br> <center><font size="+2"> Department of Computer Science </font></center> <br> <center><font size="+2"> "Sapienza" University of Rome</font></center> <br> <p></p> <p><font size="+1">At the University of Rome "La Sapienza", the Computer Networks group is presently using the simulation software OPNET mainly for teaching activities and educational purposes. Some research is in progress in a group of researchers, master students and Ph D students.</font> </p><p><font size="+1">The tool has been used to study the problem of mobile sensor deployment and to simulate the behavior of the sensors under different algorithms and communication protocols.</font> <br> --- <p><font size="+2">Research</font></p> <font size="+1"> <b><font color="#666666">Mobile Sensor Networks</font></b> <ul> <li> Autonomous Deployment of Mobile Sensors </li> <li> Energy Saving Protocols </li> <li> Algorithms for Heterogeneous Sensors</li> </ul> </font> --- <p><font size="+2">Papers</font></p> <p><font size="+1"><b> Snap and Spread: a self-deployment algorithm for mobile sensor networks<br> </b></font> <span class="conference_name">N.Bartolini, T. Calamoneri, E. G. Fusco, A. Massini, S. Silvestri<br> in IEEE International Conference on Distributed Computing in Sensor Systems (DCOSS-2008) </span><br> <p> *Abstract* The use of mobile sensors is motivated by the necessity to monitor critical areas where sensor deployment cannot be performed manually.<br> In these working scenarios, sensors must adapt their initial position to reach a final deployment which meets some given performance objectives such as coverage extension and uniformity, total moving distance, number of message exchanges and convergence rate.<br> We propose an original algorithm for autonomous deployment of mobile sensors called Snap & Spread. Decisions regarding the behavior of each sensor are based on locally available information and do not require any prior knowledge of the operating conditions nor any manual tuning of key parameters. We conduct extensive simulations to evaluate the performance of our algorithm. This experimental study shows that, unlike previous solutions, our algorithm reaches a final stable deployment, uniformly covering even irregular target areas. Simulations also give insights on the choice of some algorithm variants that may be used under some different operative settings. </p> --- <p><font size="+1"><b> Autonomous deployment of self-organizing mobile sensors for a complete coverage </b></font> <span class="conference_name">N.Bartolini, T. Calamoneri, E. G. Fusco, A. Massini, S. Silvestri<br> in Proceedings of the International Workshop on Self-Organizing Systems (IWSOS-2008) </span><br> <p> *Abstract* Mobile sensor networks are important for a number of strategic applications devoted to monitoring critical areas. Coverage completeness and uniformity determine the effectiveness of the sensor deployment. Despite the primary importance of such features, the initial sensor deployment of many applications is neither complete nor uniform, as sensors are sent from a safe location or dropped from an aircraft. The use of mobile sensors permits a dynamic reconfiguration of the sensor deployment. Sensors should coordinate their movements to quickly reach a more satisfactory deployment while minimizing the total traversed distance and the number of message exchanges. Existing distributed solutions either do not guarantee complete coverage or do not lead to a stable deployment. In this paper we propose a fully distributed algorithm for autonomous deployment of mobile sensors called PUSH&PULL, which is based on the interleaved execution of four basic activities. According to our proposal, movement decisions are made by each sensor on the basis of locally available information and do not require any prior knowledge of the operating conditions nor any manual tuning of key parameters. We prove that, unlike previous proposals, our approach guarantees a complete coverage, provided that a sufficient number of sensors are available. Furthermore, we demonstrate that the algorithm execution always terminates preventing movement oscillations. Extensive simulations show that our algorithm reaches a complete coverage within reasonable time with moderate energy consumption, even when the target area has irregular shapes. Performance comparisons between PUSH&PULL and one of the most acknowledged algorithms show how the former can reach a more uniform and complete coverage under a wide range of working scenarios, with lower energy consumption. </p> --- <p><font size="+1"><b> Push and Pull: autonomous deployment of mobile sensors for a complete coverage </b></font> <span class="conference_name">N. Bartolini, T. Calamoneri, E. G. Fusco, A. Massini, S. Silvestri<br> in ACM Wireless Networks, accepted for publication, (to appear). </span><br> <p> *Abstract* Mobile sensor networks are important for several strategic applications devoted to monitoring critical areas. In such hostile scenarios, sensors cannot be deployed manually and are either sent from a safe location or dropped from an aircraft. Mobile devices permit a dynamic deployment reconfiguration that improves the coverage in terms of completeness and uniformity.<br> In this paper we propose a distributed algorithm for the autonomous deployment of mobile sensors called PUSH&PULL. According to our proposal, movement decisions are made by each sensor on the basis of locally available information and do not require any prior knowledge of the operating conditions or any manual tuning of key parameters. <br> We formally prove that, when a sufficient number of sensors are available, our approach guarantees a complete and uniform coverage. Furthermore, we demonstrate that the algorithm execution always terminates preventing movement oscillations.<br> Numerous simulations show that our algorithm reaches a complete coverage within reasonable time with moderate energy consumption, even when the target area has irregular shapes. Performance comparisons between PUSH&PULL and one of the most acknowledged algorithms show how the former one can efficiently reach a more uniform and complete coverage under a wide range of working scenarios. </p> --- <p><font size="+1"><b> Autonomous deployment of heterogeneous mobile sensors </b></font> <span class="conference_name">N.Bartolini, T. Calamoneri, T. La Porta, A. Massini, S. Silvestri<br> in Proceedings of the IEEE International Conference on Network Protocols (ICNP-2009), Best Paper</span><br> <p> *Abstract* In this paper we address the problem of deploying heterogeneous mobile sensors over a target area. We show how traditional approaches designed for homogeneous networks fail when adopted in the heterogeneous operative setting. Unfortunately, network and device homogeneity is an unrealistic assumption in most practical deployments. In order to deal with realistic scenarios, we introduce Vor_Lag, a generalization of the Voronoi approach based on Laguerre geometry. We theoretically prove the appropriateness of our approach to the management of heterogeneous networks. In addition we demonstrate that Vor_Lag can be extended to deal with dynamically generated events or uneven energy depletion due to communications. Furthermore, by means of simulations, we show that Vor_Lag provides a very stable sensor behavior, with fast and guaranteed termination and moderate energy consumption. We also show that Vor_Lag performs better than other methods based on virtual forces.</p> --- <p><font size="+1"><b> On adaptive density deployment to mitigate the sink-hole problem in mobile sensor networks </b></font> <span class="conference_name">N. Bartolini, T. Calamoneri, A. Massini, S. Silvestri<br> in ACM/Springer Mobile Networks and Applications, (to appear). </span><br> <p> The use of mobile sensors is of great relevance to monitor critical areas where sensors cannot be deployed manually. The presence of data collector sinks causes increased energy depletion in their proximity, due to the higher relay load under multi-hop communication schemes (sink-hole phenomenon). We propose a new approach towards the solution of this problem by means of an autonomous deployment algorithm that guarantees the adaptation of the sensor density to the sink proximity and enables their selective activation. The proposed algorithm also permits a fault tolerant and self-healing deployment, and allows the realization of an integrated solution for deployment, dynamic relocation and selective sensor activation. We formally prove the termination of our algorithm. Performance comparisons between our proposal and previous approaches show how the former can efficiently reach a deployment at the desired variable density with moderate energy consumption under a wide range of operative settings. </p> --- <p><font size="+2">Teaching:</font></p> <font size="+1"> * Digital circuit design * Computer architectures * Scientific computation </font> --- <!-- <p><b>Authored papers</b> (please provide this information upon completion of research)</p> --> <p><strong><font size="2">OPNET Technologies,</font></strong> <font size="2">Inc. is a leading provider of solutions for managing networks and applications. OPNET's best-in-class solutions address <a href="http://www.opnet.com/solutions/application_performance/ace.html">application troubleshooting</a>, <a href="http://www.opnet.com/solutions/application_performance/panorama_production.html">application monitoring</a>, <a href="http://www.opnet.com/solutions/application_performance/acelive.html">network monitoring</a>, <a href="http://www.opnet.com/solutions/network_operations/it_sentinel.html">network configuration management</a>, <a href="http://www.opnet.com/solutions/capacity_management/itguru_net_planner.html">capacity management</a>, and <a href="http://www.opnet.com/solutions/network_rd/modeler.html">network simulation</a>. OPNET’s solutions have been operationally proven in thousands of customer environments worldwide, including corporate and government enterprises, government and defense agencies, network service providers, and network equipment manufacturers. For more information about <a href="http://www.opnet.com/">OPNET</a> and its products, visit <a href="http://www.opnet.com/">www.opnet.com</a>.</font></p> <hr color="#999999" noshade="noshade" size="1"><strong> </strong> </td> <td align="left" height="510" valign="top" width="16%"> </td> </tr> </tbody></table> <table summary=""> <tbody><tr> <td width="550"> </td> </tr> </tbody></table> </body></html> -- Users.AnnalisaMassini - 09 Mar 2010
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Topic revision: r1 - 2010-03-09
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