Networks and Cyber Physical Systems Lab (NECPHY-Lab)

NECPHY-Lab was founded by Dr. Long Le with research grants from CFI Leaders Opportunity Fund and Quebec government. NECPHY-Lab commits to promote excellent research and education in wireless communications and networking as well as their applications in Cyber Physical Systems (CPSs). Application areas of interest include smart grids, healthcare, and transportation. Our current research focuses are the following

- Cognitive radio and dynamic spectrum sharing
- Radio resource management for heterogeneous wireless networks
- Green communications and networking
- Network control and optimization
- Smart grids, E-health, VANETs

We are in the final phase to acquire rich sets of signal generation and measurement equipments including vector signal generator, arbitrary waveform generator, real-time and portable spectrum analyzers, oscilloscope, logic analyzer. In addition, we have several wireless network testbeds supporting R&D activities in various applications including heterogeneous cognitive radio testbeds, wireless sensor-based testbeds supporting healthcare and emerging applications. We look forward to collaboration and partnership opportunities with industries in these application areas.

Biography of Dr. Long Le: Dr. Long Le received his PhD degree from University of Manitoba in 2007, M.Eng. degree from Asian Institute of Technology (AIT)  in 2002, and B.Eng. degree from Ho Chi Minh City University of Technology in 1999. He joined INRS-EMT, University of Quebec as a tenure-track faculty member in October 2010. Before that he was a postdoctoral researcher at Massachusetts Institute of Technology (MIT). Dr. Long Le a member of the editorial board of IEEE Communications Surveys and Tutorials and IEEE Wireless Communications Letters. He has served as technical program committee co-chairs of the Wireless Networks track at IEEE VTC’2011-Fall and the Cognitive Radio and Spectrum Management track at IEEE PIMRC’2011.

More information about Dr. Long Le can be found in his Curriculum Vitae.

Contact information:

Long Le, PhD
Assistant Professor
Institut National de la Recherche Scientifique (INRS)
University of Quebec
800 de la Gauchetière West, Suite 6900
Montreal, QC, H5A 1K6, Canada
Phone: 1-514-228-7015 (Office),
Cell: 1-514-889-0235
Email: long.le@emt.inrs.ca
 

For prospective students: There are openings for well-motivated PhD students with financial support in my group at INRS, University of Quebec. Candidates with master degree and strong knowledge of wireless communication, networking, and applied math (e.g., optimization, queueing, game theory) are preferred. Interested candidates are encouraged to send emails describing their research background and interests with CV, transcripts, sample publications (if available) to me at long.le@emt.inrs.ca

Want to know: Some potential reasons to study in Montreal and INRS:

- Montreal is a great bilingual city with exciting activities throughout the year.
Want to know something about Montreal, please click: Video1 and Video2

- Montreal and nearby Ottawa areas are high-tech centers of Canada, which offer great opportunities to interact with industries

- Fast processing of admission letter (one month)

Selected Publications:  (Here is the full list of publications)

1. Hetnets/femtocell networks
   - Duy Ngo, Long B. Le, Tho Le-Ngoc, Ekram Hossain, and Dong In Kim, "Distributed interference management in two-tier CDMA femtocell networks," IEEE Transactions on Wireless Communications, vol. 11, no. 3, pp. 979-989, Mar. 2012. (Listed in top-accessed journals in IEEE TWC in March 2012)
   - N. Saquib, E. Hossain, Long B. Le, and D. I. Kim, "Interference management in OFDMA femtocell networks: Issues and approaches," IEEE Wireless Communications, to appear.
    

2. Network control and optimization
   - Long B. Le, Eytan Modiano, and Ness B Shroff, "Optimal control of wireless networks with finite buffers,"  IEEE/ACM Transactions on Networking, to appear.
   - Guner D. Celik, Long B. Le, and Eytan Modiano, "Scheduling in parallel queues with randomly varying connectivity and switchover delay," IEEE INFOCOM 2011 mini-conference, April 2011.
   - Long B. Le, Eytan Modiano, Changhee Joo, and Ness B. Shroff, "Longest-queue-first scheduling under SINR interference model," ACM MobiHoc'2010.
   - Hyang-Won Lee, Eytan Modiano, and Long B Le, "Distributed throughput maximization in wireless networks via random power allocation," IEEE Transactions on Mobile Computing, vol. 11, no. 4, pp. 577-590, April 2012.
   - Long B. Le, K. Jagannathan, and Eytan Modiano, ``Delay analysis of maximum weight scheduling in wireless ad hoc networks,'' Conference on Information Sciences and Systems (CISS'2009,) Johns Hopkins University USA.
    

3. Cognitive radio and dynamic spectrum sharing
   - Long B. Le, Ekram Hossain, "Resource allocation for spectrum underlay in cognitive radio networks," IEEE Transactions on Wireless Communications, vol. 7, no. 12, pp. 5306-5315, Dec. 2008.
   - Dong In Kim, Long B. Le, and Ekram Hossain, "Joint rate and power allocation for cognitive radios in dynamic spectrum access environment," IEEE Transactions on Wireless Communications, vol. 7, no. 12, pp. 5517-5527, Dec. 2008.
   - Patrick Mitran,  Long B. Le, and Catherine Rosenberg, "Queue-aware resource allocation for downlink OFDMA cognitive radio networks,"  IEEE Transactions on Wireless Communications, vol. 9, no. 10, pp. 3100-3111, Oct. 2010.
   - Le Thanh Tan and Long B. Le, "Channel assignment with access contention resolution for cognitive radio networks," IEEE Transactions on Vehicular Technology, to appear.
   - Le Thanh Tan and Long B. Le, "Distributed MAC protocol for cognitive radio networks: Design, analysis, and optimization," IEEE Transactions on Vehicular Technology, vol. 60, no. 8, Oct. 2011.
   - Ekram Hossain, Long B. Le, Natasha Devroye, Mai Vu, "Cognitive radio: From theory to practical network engineering," invited chapter in Advances in Wireless Communications, (Eds. Vahid Tarokh and I. Blake), Springer, 2009.
    

4. Cooperative diversity and relay networks
   - Long B. Le, Ekram Hossain, “Cross-layer optimization frameworks for  multihop wireless networks using cooperative diversity,” IEEE Transactions on Wireless Communications, vol. 7, no. 7,  pp. 2592-2602, July 2008.
   - Long B. Le, Ekram Hossain, ``An analytical model for ARQ cooperative diversity in multihop wireless networks,'' IEEE Transactions on Wireless Communications, vol. 7, no. 5, pp.1786-1791, May 2008.
   - Long B. Le, Sergiy A. Vorobyov, K Phan, Tho Le-Ngoc, "Resource allocation and QoS provisioning for wireless relay networks," invited chapter in Quality of Service Architectures for Wireless Networks: Performance Metrics and Management (Editors Sasan Adibi, Raj Jain), IGI Global, 2010.
    

5. Cross-layer design and analysis
   - Long B. Le, E. Hossain, and M. Zorzi, "Queueing analysis for GBN and SR ARQ protocols under dynamic radio link adaptation with non-zero feedback delay, " IEEE Transactions on Wireless Communications, vol. 6. no. 9, pp. 3418 - 3428, Sept. 2007.
   - Long B. Le, E. Hossain, and Attahiru S. Alfa, "Delay statistics and throughput performance for multi-rate wireless networks under multiuser diversity,"  IEEE Transactions on Wireless Communications, vol. 5, no. 11, pp. 3234-3243, Nov. 2006.
   - Long B. Le , E. Hossain, and Attahiru S. Alfa, "Service differentiation in multi-rate wireless networks with weighted round-robin scheduling and ARQ-based error control," IEEE Transactions on Communications, vol. 54, no. 2,  pp. 208-215, Feb. 2006.