Arzad Alam Kherani

Assistant Professor

Dept. of Computer Science and Engineering
Indian Institute of Technology, New Delhi
Tel: +91 (11) 26 59 60 10, (cell) 9911375801, Fax: +91 (11) 26 58 10 60
E-mail:  (For some unknown reason this email address does not always work. In such cases, please try the alternate email:

Research activities

The problems I have worked on include (chronological order):


  • Jan 2006: CSL862: Control of Queueing Systems
  • Jan 2006: Special Module in Theoretical Computer Science (Large Deviations)
  • Aug 2006: CSV886: Special Module in Algorithms: Convex Optimization: (The date/time/venue for the first meeting for this course will be available on this page soon (Most probably we will be meeting in the third week of august).)
  • Aug2006: CSL374: Computer Networks.
  • Jan2007: EEL703: Computer Networks.
  • Upcoming: Aug 2007: Percolation Theory and its application to communication networks: Jointly with Amitabha Bagchi

  • Students


  • Smruti Padhy
  • Masters

  • Mohd. Sohrauddin
  • Nikhil Bhargava
  • Ashwin Rao
  • UnderGrad

  • Ashish Sangwan

  • Journal Publications

    (Papers in which I am corresponding author are shown in color.)

    1. (A. Kumar, M. Hegde, SVR Anand, BN Bindu, D. Thirumurthy)
      Nonintrusive TCP Connection Control for Bandwidth Management of an Internet Access Link.
      IEEE Communications Magazine, May 2000.
    2. (Anurag Kumar)
      The Lightening Effect of Adaptive Window Control,
      in IEEE Communication Letters, June 2003.
    3. (V. S. Borkar and S. Juneja)
      Performance analysis conditioned on rare events: An adaptive simulation scheme,
      Communications in Information and Systems, 2003.
    4. (Anurag Kumar)
      Long Range Dependence in Network Traffic and the Closed Loop Behaviour of Buffers Under Adaptive Window Control.
      Performation Evaluation, 2004.
    5. (E. Altman, K. Avratchenkov, C. Barakat, B. J. Prabhu)
      Analysis of MIMD Congestion Control Algorithm for High Speed Networks.
      Computer Networks, 2004.
    6. (E. Altman, D. Miorandi)
      A Queueing Model for HTTP Traffic over IEEE 802.11 WLANs
      Computer Networks, 2005.
    7. (E. Altman, K. E. Avrachenkov and B. J. Prabhu)
      Comparative Study of different adaptive window protocols
      Special Issue of Telecommunication Systems devoted to High Speed Transport Protocols, 2005.
    8. A Direct Approach to Sojourn Times in a Busy Period of an M/M/1 Queue
    9. (A. Al-Hanbali, P. Nain, R. Groenevelt and E. Altman)
      Impact of Mobility on the Performance of Relaying in Ad Hoc Networks
      Computer Networks, 2007.
    10. (D. Kumar and E. Altman)
      Route Lifetime based Optimal Hop Selection in VANETs on Highway: An analytical viewpoint
      IEEE itansactions on vehicular technology, 2007.

    Conference Publications

    1. (Anurag Kumar)
      Performance Analysis of TCP with Nonpersistent Sessions.
      Workshop on the Modeling of Flow and Congestion Control Mechanisms, INRIA, Paris, France, September 2000.
    2. (P. S. Chanda and A. Kumar)
      An Approximate Calculation of Max-Min Fair Throughputs for Non-Persistent Elastic Sessions.
      Internet Performance Symposium (IEEE Globecom'01).
    3. (Anurag Kumar)
      Stochastic Models for Throughput Analysis of Randomly Arriving Elastic Flows in the Internet.
      IEEE Infocom 2002.
    4. (Anurag Kumar)
      Modeling the Link Buffer under Adaptive Window Controlled Transfer of Heavy Tailed Files,
      40th Allerton Conference on Communication, Control, and Computing, October 2002.
    5. (Anurag Kumar)
      Closed Loop Analysis of the Bottleneck Buffer under Adaptive Window Controlled Transfer of HTTP-Like Traffic,
      IEEE Infocom 2003.
    6. (V. S. Borkar and S. Juneja)
      An Adaptive Simulation scheme for Conditional Performance Analysis,
      International workshop on IT-enabled Manufacturing, Logistics and Supply chain management, 2003.
    7. (R. Shorey and S. Bansal)
      Performance of TCP and UDP Protocols in Multi-Hop Multi-Rate Wireless Networks,
      IEEE WCNC 2004.
    8. (R. Shorey)
      Throughput Analysis of TCP in Multi-Hop Wireless Networks with IEEE 802.11 MAC,
      IEEE WCNC 2004.
    9. (R. Shorey)
      Performance Improvement of TCP with Delayed ACKs in IEEE 802.11 Wireless LANs,
      IEEE WCNC 2004.
    10. (Anurag Kumar)
      On Processor Sharing as a Model for TCP Controlled HTTP-like Transfers,
      ICC 2004.
    11. (V. S. Borkar)
      Random Access in Wireless Ad Hoc Networks as a Distributed Game,
      WiOpt 2004.
    12. ( E. Altman, K. Avratchenkov, C. Barakat and B. J. Prabhu)
      Analysis of Scalable TCP,
      IEEE HSNMC 2004.
    13. (E. Altman and V. S. Borkar)
      Optimal Random Access in Networks with Two-Way Traffic,
      PIMRC 2004.
    14. (D. Miorandi and E. Altman)
      A queueing model for HTTP traffic over IEEE 802.11 WLANs,
      ITC Specialist Seminar, 2004.
    15. (K. E. Avrachenkov, N. O. Vilchevsky, V. S. Zaborovski)
      Optimal Tuning of the TCP Retransmission TimeOut for small-BDP lossy wireless networks,
      ITC Specialist Seminar, 2004.
    16. (E. Altman, Vivek S. Borkar, P. Michiardi, R. Molva)
      Some Game-Theoretic Probelms in Wireless Ad-Hoc Networks
      Springer LNCS, proceedings of the Euro-NGI workshop, Dagstuhl, Germany, June 2004.
    17. (E. Altman, K. Avrachenkov and B. J. Prabhu)
      Performance Analysis and Stochastic Stability of Congestion Control Protocols,
      IEEE Infocom 2005, Miami, USA. Slides
    18. (V. S. Borkar, B. J. Prabhu)
      Closed and Open Loop Optimal Control of Buffer and Energy of a Wireless Device
      WiOpt 2005.
    19. (E. Altman, K. Avrachenkov and B. J. Prabhu)
      Analysis of Scalable TCP in the presence of Markovian Losses
      PFLDNet 2005, Lyon, France.
    20. (E. Altman, P. Michiardi and R. Molva)
      Non-cooperative Forwarding in Ad-hoc Networks
      IFIP Networking Conference, Canada, May 2005.
    21. (Rudesindo Nunez-Queija)
      TCP as an Implementation of Age-Based Scheduling: Fairness and Performance
    22. in IEEE Infocom 2006.
    23. (Ahmad Al Hanbali, Robin Groenevelt, Philippe Nain, Eitan Altman)
      Impact of Mobility on the Performance of Relaying in Ad Hoc Networks
    24. in IEEE Infocom 2006.
    25. (R. Shorey)
      Modelling TCP Performance in AdHoc Networks with Randomly Varying Channel
    26. in Willopan 2006, New Delhi, India.
    27. Interaction of Multiple TCP Connections in an IEEE 802.11 Network
    28. in National Conference on Communications, NCC 2006, New Delhi, India.
    29. (Dinesh Kumar, Eitan Altman)
      A Structural Property of Solutions to Path Optimization Problems in Random Access Networks
    30. in WiOpt 2006.
    31. (Eitan Altman, Rachid El Azouzi)
      Stability-Throughput tradeoff and routing in multi-hop wireless ad-hoc networks
    32. in IFIP Networking 2006.
    33. (Dinesh Kumar, Eitan Altman)
      Route lifetime based optimal hop selection in VANETs on highway: An analytical viewpoint
    34. in IFIP Networking 2006.
    35. Sojourn Times in (Discrete) Time Shared Systems and their Continuous Time Limits
    36. in Valuetools 2006.
    37. (Taposh anerjee)
      Optimal Control of Admission to a Station in a Closed Two Queue System
    38. in Valuetools 2006.
    39. (Smruti Padhy)
      Tail Equivalence for Some Time-shared Systems
    40. in Valuetools 2006.
    41. (T. Banerjee, S. Padhy)
      Optimal Dynamic Activation Policies in Sensor Networks
    42. in COMSWARE 2007.
    43. (T. Banerjee)
      Sensor Node Activation Policies using Partial or No Information
    44. in WiOpt 2007.
    45. (M. Farukh Munir, F. Filali)
      On Stability and Sampling schemes for Wireless Sensor Networks
    46. in WiOpt 2007.
    47. (A. Al Hanbali and P. Nain)
      Simple models for performance evaluation of a class of two-hop relay protocols
    48. in IFIP Networking 2007.

    Research Reports

    1. (E. Altman, P. Michiardi and R. Molva)
      Non-cooperative Forwarding in Ad-hoc Networks
      INRIA Report No. RR-5116, Sophia-Antipolis, France, February 2004.
    2. (E. Altman, K. Avrachenkov, A. A. Kherani and B. J. Prabhu)
      Performance Analysis and Stochastic Stability of Congestion Control Protocols
      INRIA Research Report No. RR-5262, Sophia-Antipolis, France, July 2004.
    3. (V. S. Borkar, A. A. Kherani and B. J. Prabhu)
      Control of Buffer and Energy of a Wireless Device: Closed and Open Loop Approaches
      INRIA Research Report No. RR-5414, Sophia-Antipolis, France, December 2004.
    4. (A. Al-Hanbali, E. Altman, R. Groenevelt, P. Nain)
      Impact of Mobility on the Performance of Message Relaying in Ad hoc Networks
      INRIA Research Report No. RR-5480, Sophia-Antipolis, France, Jan 2005.
    5. (D. Kumar, E. Altman)
      Route Lifetime based Interactive Routing in Intervehicle Mobile Ad Hoc Networks
      INRIA Research Report No. RR-5691, Sophia-Antipolis, France, Sept 2005.

    Journal Submissions

    1. (E. Altman, K. Avrachenkov, B. J. Prabhu)
      Performance and Stability Analysis of Congestion Control Protocols
      Submitted to Probability in Engineering and Informational Sciences
    2. DPS with Dynamic Weights
      Submitted to QUESTA

    Some Links