Vijay Subramanian's Webpage

Dr Vijay Subramanian

Contact information

E-mail: v-subramanian at northwestern.edu OR vjsubram at eecs.northwestern.edu .
Phone: +1 847 467 5168.
Fax: +1 847 491 4455.
Mail: 2145 Sheridan Road, Tech L359, Evanston, IL 60208-3118, USA.

About me

I earned my degrees in two different continents: B. Tech. in Electronics Engineering in 1993 from the Indian Institute of Technology, Chennai, India , M.Sc.(Engg.) in Electrical Communication Engineering in 1995 from the Indian Institute of Science, Bengaluru, India, Ph.D. in Electrical Engineering in 1999 from the University of Illinois at Urbana-Champaign, Illinois, USA. After graduating I worked in the research arm of the Networks Business Sector of Motorola in Arlington Heights, Illinois, USA until May 2006. While at Motorola I worked on enabling wireless data via the design and implementation of cutting-edge scheduling algorithms and proposing distributed interference and mobility management solutions. My work resulted in 10 patents and many papers. In May 2006 I returned back to an academia setting, to work on broader problems whilst still retaining the real-world focus gleaned from my industrial experience. I started with a move to the Hamilton Institute of the National University of Ireland, Maynooth as a Research Fellow. In the summer of 2010 I was a visiting reseacher at LIDS MIT. From November 2010 to October 2011 I was a Senior Research Associate in the EECS Department at Northwestern University. I am at present a Research Assistant Faculty in the EECS Department at Northwestern University.

Curriculum Vitae - Dec 2011.

Communications Theory Workshop 2012

I am Posters Chair for IEEE Communications Theory Workshop, Hawaii, May 2012. Here is the flyer.

Research interests

My main research interests are in communications, information theory, stochastic modelling and applied mathematics. Most of my recent work has been on probabilitistic analysis of communication networks, especially analysis of scheduling and routing algorithms. I also have some interest in applications in immunology and coding of stochastic processes.

Teaching/Courses

EECS495 Stochastic Models for Web 2.0, Spring 2011, EECS Northwestern University.

Copyright notice

Copyright belongs to the publisher in case of published articles. Copyright belongs to the authors or authors in all other cases.

Book chapters

  1. J. Huang, Vijay G. Subramanian, R. Berry and R. Agrawal.
    Scheduling and Resource Allocation in OFDMA Wireless Systems.
    Book Chapter in Orthogonal Frequency Division Multiple Access, Auerbach Publications, CRC Press, appeared April 2010.

Journal Papers Submitted

  1. Vijay G. Subramanian and D.J.Leith.
    Convexity conditions for 802.11 WLANS.
    Submitted. July 2010.
  2. X. Chen, Vijay G. Subramanian and D. J. Leith.
    PHY Modulation/Rate Control for Fountain Codes in 802.11 WLANs.
    Submitted to IEEE Trans. Wireless Comm. June 2009.
  3. T. P. Coleman, N. Kiyavash and Vijay G. Subramanian.
    The Rate-Distortion Function of a Poisson Process with a Queueing Distortion Measure.
    Submitted May 2008, under revision.

Journal Papers Accepted/Appeared

  1. D. J. Leith, Q. Cao and Vijay G. Subramanian.
    Max-min Fairness in 802.11 Mesh Networks.
    Accepted to IEEE/ACM Trans. on Networking, August 2011.
  2. Vijay G. Subramanian, T. Javidi and S. Kittipiyakul.
    Many Sources Large Deviations of Max-Weight Scheduling.
    Appeared in IEEE Trans. Information Theory, 57(4), 2151-2168, April 2011.
  3. Vijay G. Subramanian.
    LDP for Max-Weight scheduling over convex compact rate-regions.
    Appeared in Mathematics of Operations Research, 35(4), 881-910, Nov 2010.
  4. Vijay G. Subramanian, R. Berry and R. Agrawal.
    Joint scheduling and resource allocation in Downlink of CDMA systems.
    Appeared in IEEE Trans. on Information Theory, 56(5), 2416-2432, 2010.
  5. D. J. Leith, Vijay G. Subramanian and K. R. Duffy.
    Log Convexity of Rate Region in 802.11e WLANs.
    Appeared in IEEE Comm. Letters, 14(1), 57-59, 2010.
  6. V. Badarla, Vijay G. Subramanian and D. J. Leith.
    Low-delay Dynamic Routing Using Foutain Codes.
    Appeared in IEEE Comm. Letters, 13(7), 552-554, 2009.
  7. Vijay G. Subramanian, K. R. Duffy and D. J. Leith.
    Existence and uniqueness of fair rate allocations in lossy wireless networks.
    Appeared in IEEE Transactions on Wireless Communications, 8(7), 3401-3406, 2009.
  8. K. R. Duffy and Vijay G. Subramanian.
    On the impact of correlation between collaterally consanguineous cells on lymphocyte population dynamics.
    Published online Oct 2008, Journal of Mathematical Biology, Link.
    Appeared in Journal of Mathematical Biology, 59 (2), 255-285, 2009.
  9. J. Huang, Vijay G. Subramanian, R. Agrawal and R. Berry.
    Joint scheduling and resource allocation in uplink OFDM systems for broadband wireless access networks.
    Appeared in IEEE JSAC Special Issue on Broadband Access Networks, Vol. 27:2, Feb 2009 Pages: 226--234.
  10. J. Huang, Vijay G. Subramanian, R. Agrawal and R. Berry.
    Downlink scheduling and resource allocation for OFDM systems.
    Appeared in IEEE Trans. on Wireless Communications, Vol. 8:1, Jan 2009, Pages:288--296.
  11. Vijay G. Subramanian, K. R. Duffy, M. L. Turner and P. D. Hodgkin.
    Determining the expected variability of immune responses using the Cyton Model.
    Appeared in Journal of Mathematical Biology, 56 (6), 861-892, June 2008.
  12. B. Hajek and Vijay G. Subramanian.
    Broad-band fading channels: Signal Burstiness and Capacity.
    Appeared in IEEE Trans. on Information Theory Vol. 48:4, April 2002.
  13. Vijay G. Subramanian, and B. Hajek.
    Capacity and Reliability Function for Small Peak Signal Constraints.
    Appeared in IEEE Trans. on Information Theory Vol. 48:4, April 2002.
  14. Vijay G. Subramanian and R. Srikant.
    Tail probabilities of low-priority waiting times and queue lengths in MAP/GI/1 queues.
    Appeared in Queueing Systems Vol 34:1-4, 2000.

Funding/Travel Grants

Conference submissions

  1. Vijay G. Subramanian and M. Alanyali.
    Delay performance of CSMA in networks with bounded degree conflict graphs

Working articles

  1. Vijay G. Subramanian and R. Agrawal.
    Convergence and Optimality of Opportunistic Scheduling Algorithms.
    July 2011.
  2. A. Nedich, Vijay G. Subramanian.
    Approximately Optimal Utility Maximization.
    July 2011.

Conference publications: Refereed and invited conference publications can be found here.

Presentations: Upcoming and recent presentations can be found here.

Miscellaneous

  1. Tutorial on Scheduling in Wireless Networks.
    Salient features of different opportunistic scheduling algorithms for broadcast channels - pointing out how all known algorithms maximise a weighted-sum of rates over current channel.
    Tutorial at IEEE VTC 2005, Dallas, TX.

  2. Analysis of Multiuser Diversity in Wireless Networks.
    Analysis of different opportunistic scheduling algorithms. Presentation at INFORMS 2002, Boca Raton, FL.
    Abstract.

Awarded Patents
  1. US Patent, Method and system for allocating subcarriers to subscriber devices, #7586990, Sept. 2009.

  2. US Patent, Method and apparatus for resource allocation and scheduling, #7564820, Jul. 2009.

  3. US Patent, Methods for dividing base station resources, #7558577, Jul. 2009.

  4. US Patent, Variable reliability wireless communication transmission method and apparatus, #7539214, May 2009.

  5. US Patent, Method and apparatus for improved channel maintenance signaling, #7492752, Feb. 2009.

  6. US Patent, System and method for increased battery saving during idle mode in a wireless communication system, #7471942, Dec. 2008.

  7. US Patent, Method to facilitate determination of a data rate, #7447154, Nov. 2008.

  8. Japan/Korea Patent, Method and apparatus for resource allocation and scheduling, #JP3950460, Jan. 2007.

  9. European Patent, Method for packet scheduling and radio resource allocation in a wireless communication system, #EP1227626, Oct. 2006.

  10. US Patent, A method for packet scheduling and resource allocation in a wireless communication system, #6987738, Jan. 2006.

Standards Contributions
  1. IEEE 802.16e, Handover triggers, Association procedures, May-June 2005.

  2. IEEE 802.16g, Network Reference Model, Oct. 2004.

Service
  1. Technical Program Committee work:
    BroadWim 2004, IEEE WCNC 2006 PHY/MAC, RAWNET 2006 (along with WiOpt 2006), Globecom 2008 Wireless Networks Symposium, WICON 2008, MACOM 2009, ComNets 2010, INFOCOM 2010 WiP, ACM MobiHoc 2011.