Prof. K.P. (Suba) Subbalakshmi

Cognitive Radio Networking

 Cognitive radio (CR) enabled dynamic spectrum access (DSA) is hailed as the latest frontier of wireless communications. It provides a mechanism to address the issue of underutilization of licensed spectrum bands brought about by static spectrum allocation policies. Scientific research in this area has drive significant policy changes throughout the world. Several countries have now liberalized spectrum sharing in order to achieve better broadband connectivity. My group's research in this area spans several topics from dynamic spectrum access protocol and system design to the unique security and reliability challenges that these new paradigms open up. Our research has given rise to a technology start-up company, Dynamic Spectrum LLC in this area. My research in this area has been supported by the National Science Foundation and the National Institute of Justice. My publications in this area have been cited in the Wireless Spectrum Research and Development (WSRD), Senior Steering Group (SSG) Suggested Readings as well as the IEEE COMSOC Best Reading Topics on Cognitive Radio. One of the papers also won a Best Student Paper Award for my student.  I serve as a Subject Matter Expert to the National Spectrum Consortium, a body whose mission it is to execute R&D, prototyping, and piloting initiatives using innovative contracting methodologies that leverage both governmental and consortia technological, financial, and human resources to coordinate and broaden the access to, and maximize the military and commercial value of the existing electromagnetic spectrum. I am the Founding Chair of the Security Special Interest Group, IEEE Technical Committee on Cognitive Networks. I am also a Founding Associate Editor of IEEE Transactions on Cognitive Networks and I handle Cognitive Radio Related papers as an Associate Editor of IEEE Transactions on Vehicular Technology.

 

Dynamic Spectrum Access Network Security

  • S. Anand, Shamik Sengupta, Hong Kai, K.P. Subbalakshmi, R. Chandramouli and Hassan Cam, "Exploiting Channel Fragmentation and Aggregation/ Bonding to Create Security Vulnerabilities", IEEE Transactions on Vehicular Technology, 63 (8), 3867 - 3874, Feb 2014.
  • Zituo Jin, S. Anand and K.P. Subbalakshmi. (Oct 2014). "NEAT: A NEighbor AssisTed Spectrum Decision Protocol for Resilience against PUEA", IEEE Workshop on Cognitive Radio and Electromagnetic Spectrum Security (CRESS 14). [Invited Paper].
  • Zituo Jin, S. Anand and K.P. Subbalakshmi. (2012). "Impact of Primary User Emulation Attacks on Dynamic Spectrum Access Networks", Transactions on Communications, IEEE. 9 (60), 2635- 2643.  Download (304 kb PDF).
  • Yi Tan, Shamik Sengupta and K.P. Subbalakshmi. (May 22, 2012). "Primary user emulation attack in dynamic spectrum access networks: a game-theoretic approach", IET Communications, IET. 6 (8), 964- 973.  Download (251 kb PDF).
  • Yi Tan, Shamik Sengupta and K.P. Subbalakshmi. (Apr 2011). "Analysis of Coordinated Denial-of-Service Attacks in IEEE 802.22 Networks", Journal on Selected Areas of Communications, Special Issue on Cognitive Radio Networking and Communications, IEEE. 29 (4), 890- 902.
  • S. Anand, Kai Hong, R. Chandramouli, Shamik Sengupta and K.P. Subbalakshmi. "Security Vulnerability due to Channel Aggregation/Bonding in LTE and HSPA+ Networks", IEEE GLOBECOM 2011.
  • Yi Tan, Shamik Sengupta and K. P. Subbalakshmi. (Dec 2011). "Human Society Inspired Dynamic Spectrum Access Networks: The Effect of Parochialism", IEEE GLOBECOM 2011 - Cognitive Radio and Networks Symposium (GC'11 - CRN).
  • Yi Tan, Kai Hong, Shamik Sengupta and K. P. Subbalakshmi. (Dec 2011). "Using Sybil Identities for Primary User Emulation and Byzantine Attacks in DSA Networks", IEEE GLOBECOM 2011 - Cognitive Radio and Networks Symposium (GC'11 - CRN).
  • Yi Tan, Shamik Sengupta and K.P. Subbalakshmi. (May 2011). "Spectrum Stealing via Sybil Attacks in DSA Networks: Implementation and Defense", International Conference on Communications. IEEE.
  • Zituo Jin, Anand Santhanakrishnan and K.P. Subbalakshmi. (Nov 2010). "Performance Analysis of Dynamic Spectrum Access Networks under Primary User Emulation Attacks", IEEE GLOBECOM 2010.
  • Zituo Jin, Anand Santhanakrishnan and K.P. Subbalakshmi. (Nov 2010). "Robust Spectrum Decision Protocol against Primary User Emulation Attacks in Dynamic Spectrum Access Networks", IEEE Globecom 2010. IEEE.
  • Yi Tan, Shamik Sengupta and K.P. Subbalakshmi. (May 2010). "Coordinated Denial-of-Service Attacks in IEEE 802.22 Networks", IEEE International Conference on Communications, 2010. IEEE .  Download (181 kb PDF).
  • Goce Jakimoski and K.P. Subbalakshmi. (Jun 2009). "Towards Secure Spectrum Decision", IEEE International Conference on Communications.
  • Zituo Jin, S. Anand and K.P. Subbalakshmi. (Apr 2009). "Mitigating Primary User Emulation Attacks in Dynamic Spectrum Access Networks using Hypothesis Testing", Mobile Computing and Communications Review, Special Issue on Cognitive Radio Technologies and Systems, ACM. 13 (2), 74-85.
  • S. Anand, Zituo Jin and K.P. Subbalakshmi. (Oct 2008). "An Analytical Model for Primary User Emulation Attacks in Cognitive Radio Networks", IEEE Dynamic Spectrum Access Networks (DySPAN).
  • Goce Jakimoski and K.P. Subbalakshmi. (May 2008). "Denial-of-Service Attacks on Dynamic Spectrum Access Networks", IEEE CogNets Workshop, IEEE International Conference on Communications.
  • Chetan N. Mathur and K.P. Subbalakshmi. (Jan 11, 2007). "Digital Signatures for Centralized DSA Networks", First IEEE Workshop on Cognitive Radio Networks. Las Vegas.
  • Chetan Nanjunda and K.P. Subbalakshmi. (2007). "Security Issues in Cognitive Networks", Cognitive Networks: Towards Self-Aware Networks, Qusay H. Mahmoud, Wiley. 271-292.

 

CRN Design and Applications

  • Syed Ebrahim Safavi and K.P. Subbalakshmi, `` Effective Bandwidth for Delay Tolerant Secondary User Traffic for Multi-PU, Multi-SU, Dynamic Spectrum Access Networks, Accepted for Publication, IEEE Transactions on Cognitive Communications and Networking, vol. 1, no. 2, pp. 175-184, June 2015..
  • Vidya Sagar, R. Chandramouli and K.P. Subbalakshmi, "Method and Apparatus for Software Defined Access for HetNets", Provisional Patent Filed, April 2015.
  • Vidya Sagar, R. Chandramouli and K.P. Subbalakshmi, "Software Defined Access for HetNets", IEEE Communications Magazine, To Appear in 2016.
  • Syed Ebrahim Safavi and K.P. Subbalakshmi, "Delay Analysis of Multi-User Dynamic Spectrum Access Networks", IEEE Dynamic Spectrum Access Networks (DySPAN), September 2015.
  • Syed Eman Mahmoodi, K.P. Subbalakshmi, R. Chandramouli and Bahman Abolhassani. (Apr 2014). "Joint Spectrum Sensing and Resource Allocation for OFDM-based Transmission with a Cognitive Relay", ICST Transactions on Wireless Spectrum, 1 (1), 13.
  • Alireza Louni and K.P. Subbalakshmi. (Nov 2013). "Optimizing Flow Control in Multi-interface Wireless Cognitive Radio Networks", GLOBECOM 2013. IEEE.  Download (155 kb PDF)
  • Mahdi Azarafrooz, R. Chandramouli and K.P. Subbalakshmi. (Jul 2013). "Reciprocity and Fairness in Medium Access Control Games", IEEE ICCCN 2013. IEEE.
  • Shamik Sengupta and K.P. Subbalakshmi. (Apr 2013). "Open Research Issues in Multi-hop Cognitive Radio Networks", IEEE Communications Magazine, 51 (4), 168-176.  Download (459 kb PDF).
  • S. Sengupta, K. Hong, R. Chandramouli and K. P. Subbalakshmi. (Mar 2011). "SpiderRadio: A Cognitive Radio Network with Commodity Hardware and Open Source Software", IEEE Communications Magazine, IEEE. 49 (3), 101- 109.
  • Seyed Ebrahim Safavi and K.P. Subbalakshmi. (2011). "Optimal Joint Power Allocation and Phase Control for DS-CDMA Cognitive Radio Networks", IEEE GLOBECOM 2011.
  • Z. Dong, S. Sengupta, S. Anand, K. Hong, R. Chandramouli and K.P. Subbalakshmi. (Sep 28, 2011). "Cognitive radio mobile ad hoc networks in healthcare, Cognitive Radio Mobile Ad Hoc Networks", Cognitive Radio Mobile Ad-Hoc Networks, Richard Yu , Chapter 13, pp. , 2011, Springer. Invited . 335-349.
  • Fabrizio Granelli, P. Pawelczak, R.V. Prasad, K.P. Subbalakshmi, R. Chandramouli, J.A. Hoffmeyer, H.S. Berger, "Standardization and research in cognitive and dynamic spectrum access networks: IEEE SCC41 efforts and other activities", IEEE Communications Magazine, pp.: 71 - 79, June 2010 ( Appears in the Wireless Spectrum Research and Development (WSRD), Senior Steering Group (SSG) Suggested Readings and the IEEE COMSOC Best Reading Topics on Cognitive Radio
  • Yi Tan, Shamik Sengupta and K.P. Subbalakshmi. (Nov 2010). "Competitive Spectrum Trading in Dynamic Spectrum Access Markets: A Price War", IEEE GLOBECOM 2010.
  • Yiping Xing, Chetan N. Mathur, R. Chandramouli and K.P. Subbalakshmi. (Apr 2007). "Dynamic Spectrum Access with QoS and Interference Temperature Constraints", IEEE Transactions on Mobile Computing, 6 (4), 423–433.
  • Yiping Xing, Harikesh Kushwaha, K.P. Subbalakshmi and R. Chandramouli, "Codes and Games for Dynamic Spectrum Access", Cognitive Radio, Software Defined Radio, and Adaptive Wireless Systems, Arslan Huseyin, Springer Verlag.
  • Harikeshwar Kushwaha, R. Chandramouli, and K. P. Subbalakshmi. (2007). "Erasure Tolerant Coding for Cognitive Radios", Cognitive Networks: Towards Self-Aware Networks, Qusay H. Mahmoud, Wiley. 315-332.