Riccardo Crepaldi

 


E-mailrcrepal2 at illinois.edu [contact]

Mail:
MC 258, Siebel Center for Computer Science, 201 N. Goodwin Avenue, Urbana, IL 61801, USA

Office:
3107 Siebel Center for Computer Science
University of Illinois at Urbana Champaign

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My CV

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Education:


Current: PhD student at University of Illinois at Urbana-Champaign
Major Area: Systems and Networking
Advisor: Robin H. Kravets


Academic grade: Master's degree (5-years Laurea, V.O.) Telecommunication Engineering – Systems and networking
program at University of Padova, Italy – April 2006
Advisor: Michele Zorzi


Research Interests:

My research focuses primarily on the design of efficient algorithms for wireless mobile ad-hoc networks. Embedded sensors in mobile devices such as cars and smart phones present new opportunities to collect location-specific data about the environment. This data can be used for a great number of real-time applications. A major challenge is efficiently collecting, storing and sharing the data. I am interested in understanding the tradeoffs between energy consumption, network load and storage in the design of a fully distributed ad-hoc solution to this problem.


Research Experience:

Graduate Research Assistant - University of Illinois (Aug 2007 – present) 

  • Design and implementation of a failure-robust service discovery protocol for the management of ubiquitous computing systems with applications in healthcare and smart environments.
  • Design and evaluation of a replication system that provides reliable in-network data storage on Wireless Sensor Networks using probabilistic failure prediction models.
  • Design and evaluation of a system that provides effective data detection in Wireless Sensor Networks.
  • Design and evaluation of an energy efficient MAC protocols for Wireless Sensor Networks.
  • Design and evaluation of a location-based data overlay network protocol for disruption-tolerant networks.
  • Currently working on the design and deployment of a campus-wide multi-interface vehicular network testbed equipped with wireless radios, on-board sensors, GPS and mobile phones, to experiment a variety of sensing applications, and energy efficient protocols and DTN protocols in a real-world deployment. 

Research Intern - HP Labs (August 2009 -- December 2011)

  • Design and evaluation of a location-based data overlay network protocol for disruption-tolerant networks.
  • Design, implementation and experimental evaluation of CSI-SF, an estimation algorthm that reduces significantly the overhead to fully estimate the channel state of a MIMO link.

Research Intern - University of Padova (May 2009 -- August 2009)

  • Improvement and Implementation of a stable distribution of SYNAPSE, a network programming application for Sensor Networks based on Fountain Codes. Experimental evaluation of the protocol in multi-hop scenarios.

Research Intern - IBM Research (May 2008 -- August 2008)

  • Deployment of a full-scale, remotely managed testbed to support implementation and performance evaluation of SEAIT, wireless sensor network solution that provides real-time visibility and mechanical health monitoring to the railroad system.

Research Scientist - Consorzio Ferrara Ricerche (Italy) (May 2006 -- July 2007)

  • Design, deployment and maintenance of a Wireless Sensor Network.
  • Design, implementation and performance evaluation of localization algorithms, routing protocol for WSNs and data dissemination protocols using network coding.
  • Implementation of a prototype of a healthcare provisioning architecture.

 

Industry Experience:

Instructor - Eureka s.n.c.

  • 200 hours of teaching experience on Office Automation application, for private and industries.

Developer – Network Administrator 

  • Development of a tracking and labeling system for the meat processy industry.
  • Design and deployment of office Intranet and network administration.

About Me

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My publications

Journal Articles

Reason, J., and R. Crepaldi, "Ambient intelligence for freight railroads", IBM Journal of Research and Development, vol. 53, no. 3, 2009. Abstract
Kumar, R., R. Crepaldi, H. Rowaihy, A. F. Harris, G. Cao, M. Zorzi, and T. F. La Porta, "Mitigating Performance Degradation in Congested Sensor Networks", IEEE Transactions on Mobile Computing: IEEE Computer Society, pp. 682–697, 2008. Abstract  Download: PDF (3.56 MB)

Conference Articles

Crepaldi, R., R. Welsh, and R. Kravets, "Governing Energy for Parked Cars", The 10th Annual Conference on Wireless On-Demand Network System and Services (WONS), Banff, Alberta, 03/2013.  Download: [PDF] (968.59 KB)
Crepaldi, R., R. Welsh, and R. Kravets, "ParkingMeter: Balancing Energy Savings and Service Availability", The Tenth ACM International Workshop on VehiculAr Inter-NETworking, Systems, and Applications (VANET), Taipei, Taiwan, 06/2013.  Download: [PDF] (467.01 KB)
Crepaldi, R., J. Lee, R. Etkin, S. - J. Lee, and R. Kravets, "CSI-SF: Estimating Wireless Channel State Using CSI Sampling & Fusion", The 31th IEEE Conference on Computer Communications (INFOCOM), Orlando, FL, 04/2012. Abstract  Download: [PDF] (236.96 KB)
Crepaldi, R., R. Beavers, B. Ehrat, J. Sze, M. Jaeger, and R. Kravets, "LoadingZones: Leveraging Street Parking to Enable Vehicular Internet Access", 7th Workshop on Challenged Networks (CHANTS 2012), Istanbul, 08/2012.  Download: [PDF] (287.09 KB)
Crepaldi, R., M. Bakht, and R. Kravets, "QuickSilver: Application-driven Inter- and Intra-cluster Communication in VANETs", The Third ACM/SIGMOBILE International Workshop on Mobile Opportunistic Networking (MobiOpp), Zurich, 03/2012.  Download: [PDF] (665.5 KB)
Paul, U., R. Crepaldi, J. Lee, S. - J. Lee, and R. Etkin, "Characterizing WiFi Link Performance in Open Outdoor Networks", 8th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks (SECON), Salt Lake City, UT, 06/2011.
Ashraf, F., R. Crepaldi, and R. Kravets, "Synchronization vs. Signaling: Energy-Efficient Coordination in WSN", Fifth IEEE Workshop on Wireless Mesh Networks (WiMesh 2010), Boston, MT, 06/2010. Abstract  Download: [PDF] (129.44 KB)
Ashraf, F., R. Crepaldi, and R. Kravets, "Know Your Neighborhood: A Strategy for Energy-efficient Communication", The 7th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (MASS) , San Francisco, 11/2010. Abstract  Download: [PDF] (404.22 KB)
Thompson, N., R. Crepaldi, and R. Kravets, "Locus: A Location-based Data Overlay For Disruption-Tolerant Networks", Fifth Workshop on Challenged Networks (CHANTS 2010), Chicago, IL, 09/2010.  Download: [PDF] (206.13 KB)
Reason, J., H. Chen, R. Crepaldi, and S. Duri, "Intelligent Telemetry for Freight Trains", The 1st annual International Conference on Mobile Computing, Applications and Services (MOBICASE), 2009. Abstract
Rossi, M., G. Zanca, L. Stabellini, R. Crepaldi, A. F. Harris, and M. Zorzi, "SYNAPSE: A Network Reprogramming Protocol for Wireless Sensor Networks Using Fountain Codes", Sensor, Mesh and Ad Hoc Communications and Networks, 2008. SECON '08. 5th Annual IEEE Communications Society Conference on, pp. 188-196, June, 2008. Abstract  Download: PDF (248.64 KB)
Crepaldi, R., S. Friso, A. F. Harris, M. Mastrogiovanni, C. Petrioli, M. Rossi, A. Zanella, and M. Zorzi, "The Design, Deployment, and Analysis of SignetLab: A Sensor Network Testbed and Interactive Management Tool", Testbeds and Research Infrastructure for the Development of Networks and Communities, 2007. TridentCom 2007. 3rd International Conference on, pp. 1-10, May, 2007. Abstract  Download: PDF (4.56 MB)
Crepaldi, R., A. F. Harris, and A. Zanella, "SignetLab2: A Modular Management Architecture for Wireless Sensor Networks", Wireless Communications 2007 CNIT Thyrrenian Symposium: Springer US, 2007. Abstract  Download: PDF (2.65 MB)
Crepaldi, R., A. F. Harris, R. Kooper, R. Kravets, G. Maselli, C. Petrioli, and M. Zorzi, "Managing heterogeneous sensors and actuators in ubiquitous computing environments", SANET '07: Proceedings of the First ACM workshop on Sensor and actor networks: ACM, pp. 35–42, 2007. Abstract  Download: PDF (183.43 KB)
Crepaldi, R., P. Casari, A. Zanella, and M. Zorzi, "Testbed implementation and refinement of a range-based localization algorithm for wireless sensor networks", Mobility '06: Proceedings of the 3rd international conference on Mobile technology, applications & systems, New York, NY, USA, ACM, pp. 61, 2006. Abstract  Download: PDF (133.65 KB)

Conference Demos

Crepaldi, R., R. Beavers, B. Ehrat, and R. Kravets, "Illinois Vehicular Project, Live Data Sampling and Opportunistic Internet Connectivity", The Third ACM/SIGMOBILE International Workshop on Mobile Opportunistic Networking (MobiOpp), Zurich, 2012.
Crepaldi, R., M. Bakht, T. Abdelzaher, and R. Kravets, "Illinois vehicular project, live data sampling and energy-efficient node discovery Riccardo Crepaldi, Mehedi Bakht and Robin Kravets", ACM Annual International Conference on Mobile Systems, Applications and Services (Mobisys), 2011.  Download: Poster [PDF] (2.18 MB); Abstract [PDF] (38.62 KB)
Crepaldi, R., M. Bakht, A. F. Harris, and R. Kravets, "Leveraging Multiple Heterogeneous Radios for Energy efficient Routing", the 6th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys), 2008.  Download: Poster [PDF] (144.82 KB); Abstract [PDF] (83.86 KB)

Conference Posters

Crepaldi, R., R. Beavers, B. Ehrat, J. Sze, M. Jaeger, and R. Kravets, "LoadingZones: Leveraging Street Parking to Enable Vehicular Internet Access", The 18th Annual International Conference on Mobile Computing and Networking (MOBICOM 2012), Istanbul, 2012.  Download: [PDF] (184.35 KB)
Crepaldi, R., J. Lee, R. Etkin, S. - J. Lee, and R. Kravets, "CSI-SF: Estimating Wireless Channel State Using CSI Sampling & Fusion", The 17th Annual International Conference on Mobile Computing and Networking, Mobicom, Las Vegas, 2011. Abstract  Download: Abstract [PDF] (89.59 KB); Poster [PPT] (4.22 MB)
Crepaldi, R., R. Kravets, M. Montanari, S. Czyzewski, and R. Campbell, "Event Detection Using Phenomenon Models", the 7th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys), 2009.  Download: Poster [PDF] (1.5 MB); Abstract [PDF] (15.34 KB)
Crepaldi, R., M. Zorzi, S. Friso, A. F. Harris, and A. Zanella, "The design, deployment, and analysis of SignetLab: a sensor network testbed and interactive management tool", the ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and CHaracterization (WiNTECH), 2006.

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PIRRUS

Pirrus is a replica management system that addresses the problem of providing data availability on a wireless sensor network. Pirrus uses probabilistic failure models (e.g., derived from environmental conditions and estimation of available energy) to adaptively create and maintain a number of replicas of the data. Replica management is formulated as an energy optimization problem, then solved with a greedy heuristic that only uses information gathered from neighbors. Intuitively, Pirrus trades off the energy saved by limiting the number of replicas when the network health is good to extend the lifetime when more replicas are needed.

 

 

 

Slides:

Infocom 2009 - [PDF] [PPTX]

Type of Publication
Conference Articles

SyNaPse

SyNaPse is a TinyOS2 tool  that enables reliable over-the-air reprogramming in a multi-hop wireless sensor network.

 

Using SyNaPse it is possible to distribute new applications or upgrades to all the nodes in a Wireless Sensor Network by accessing only one node (the BaseStation), which forwards the new code to the rest of the network. 

 

In contrast to previous solutions, which implement plain NACK-based ARQ strategies, SYNAPSE++ adopts a more sophisticated error recovery approach exploiting rateless Fountain Codes (FCs). This allows it to scale considerably better in dense networks and to better cope with noisy environments. In order to speed up the decoding process and decrease its computational complexity, we engineered the FC encoding distribution through an original genetic optimization approach. Further, novel channel access and pipelining techniques have been jointly designed so as to fully exploit the benefits of Fountain Codes, mitigate the hidden terminal problem and reduce the number of collisions. All of this makes it possible for SYNAPSE++ to recover data over multiple hops through overhearing by limiting, as much as possible, the number of explicit retransmissions.

 

SyNaPse has been developed by the researchers of the SigNET lab at the University Of Padova. It is released under the BSD license.

 

Credits:

SIGNET lab: Giovani Zanca, Nicola Bui, Riccardo CrepaldiMichele Rossi

 

 

SyNaPse is a collection of three main components:

 

  • A bootloader, which sits in front of every application running on the nodes and manages the reprogramming operations.
     
  • A GoldenImage, the main part of SyNaPse. The GoldenImage is a TinyOS application that is installed in every node and must be loaded by the bootloader when the over-the-air functionalities are required.
     
  • The TinyOS libraries that can be used, but don’t have to be used, from applications to interface with the bootloader. Applicatio n designers can decide to create applications that are completely unaware of SyNaPse and its bootloader. How to switch to the GoldenImage in this case will be explained later in this document.

 

To install Synapse simply dowload this two files:


 

 

  

The following is a list of publications where you can find more detail about the design and performance of SyNaPse.

Type of Publication
Journal Articles
Rossi, M., G. Zanca, L. Stabellini, R. Crepaldi, A. F. Harris, and M. Zorzi, "SYNAPSE: A Network Reprogramming Protocol for Wireless Sensor Networks Using Fountain Codes", Sensor, Mesh and Ad Hoc Communications and Networks, 2008. SECON '08. 5th Annual IEEE Communications Society Conference on, pp. 188-196, June, 2008. Abstract  Download: PDF (248.64 KB)
Conference Articles
Conference Demos
Conference Demos

TotalSense

 

Type of Publication
Crepaldi, R., R. Kravets, M. Montanari, S. Czyzewski, and R. Campbell, "Event Detection Using Phenomenon Models", the 7th ACM International Conference on Mobile Systems, Applications, and Services (MobiSys), 2009.  Download: Poster [PDF] (1.5 MB); Abstract [PDF] (15.34 KB)
Conference Posters

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