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Sumit Roy

Integrated Systems Professor
Computing and Networking
M330 ECE
Campus Box 352500
University of Washington
Seattle, WA 98195
Phone: 206-221-5261
Research Web Page: Fundamentals of Networking Laboratory


Sumit Roy has been a faculty member in Electrical & Computer Engineering at the University of Washington since 1998, where he is presently CoE/ECE Integrated Systems Professor and directs Fundamentals of Networking lab. His research spans the gamut wireless communication and sensor network systems with a diverse emphasis: 4G and emerging 5G technologies, multi-standard wireless inter-networking and spectrum coexistence using cognitive radio platforms, terrestrial vehicular, aerial and underwater networks. He spent 2001-03 on academic leave at Intel Wireless Technology Lab as a Senior Researcher/Standards Architect engaged in systems architecture and standards development for ultra-wideband systems (Wireless PANs) and next generation high-speed wireless LANs (802.11n). His activities for the IEEE Communications Society (ComSoc) include membership of several technical and conference program committees, notably the Technical Committee on Cognitive Networks. He was elevated to IEEE Fellow by ComSoc in 2007 for “contributions to multi-user communications theory and cross-layer design of wireless networking standards,” served two stints as ComSoc Distinguished Lecturer (2014-15, 17-18) and is a frequent invited speaker @ various 5G forums such as IEEE 5G Summit ( and

Awards and Honors

Sumit Roy named 2007 IEEE Fellow

Integrated Systems Professor, 2013- present

January-July 2008, Science Foundation of Ireland’s E.T.S. Walton Fellowship (sabbatical at University College, Dublin)

Summer 2011 Distinguished Visiting Fellow, Royal Acad. Engineering (UK)

Feb-Apr. 2015 Visiting Erskine Fellow, Univ. of Canterbury, New Zealand

2014-15, 2017-18 Distinguished Lecturer, IEEE Communications Society

2018-19 Member, Executive Comm. (elected) National Spectrum Consortium

Research Projects

5G Wireless Networks

5G wireless networks will be a leap forward in terms of three broad application scenarios: i. enhanced mobile broadband (eMBB), ii. ultra-reliable and low latency communications (URLLC) and iii. massive machine type communications (mmTC). Current FUNLaB research project within this umbrella include

-Optimal Beam Training for mmWave WiFi (802.11ad)

-Radar-Communications Integration for Automotive Applications: new approaches for managing multi-radar operation for improving radar functionality within vehicular networking scenarios

-Random Access in 5G NR

-Direct Mode (Device-to-Device) Communications in a variety of Public Safety Networking applications

Spectrum Sharing

Exponentiating demand for high-speed wireless connectivity has led to (relative) spectrum scarcity and resulted in new modes of spectrum sharing (as in primary-secondary or cognitive modes). A significant part of FUNLab effort on this topic focussed on different system-centric aspects of spectrum sharing challenges including applications to TV White Spaces, emerging unlicensed-unlicensed (LTE-LAA/5G NR-U and WiFi,) and licensed-unlicensed (WiFi/LTE, radar/WiFi) coexistence scenarios.

NS-3 Network Simulator

FunLab hosts the leading open source network simulator engine ns-3 ( and is a leading source of new modules for both wireless network research and education.

Recent Publications

1.F. Hessar, A. Ashok and S. Roy, ``Radar Wi-Fi Spectrum Sharing: Evaluation of Radar Protection Regions, Radar & Comm. Spectrum Sharing," ed. S. D. Blunt, E. S. Perrins; IET London, 2017.

2. M. Mehrnoush and S. Roy, ``Coexistence of WLAN Network with Radar: Detection and Interference Mitigation," IEEE Trans. Cognitive Comm.& Networking, Dec. 2017, pp. 655-667.

3.A. Tang, S. Roy and X. Wang, ``Coded Caching for Wireless Backhaul Networks with Unequal Link Rates," IEEE Trans. Comm, Jan. 2018, pp. 1-13.

4.S. Mishra and S. Roy, ``Market Mechanisms for Dynamic Spectrum Access," IEEE Trans. Wireless Comm., May 2018, pp. 3071-3081.

5.S. Ashrafi, C. Feng and S. Roy, ``Compute-and-Forward for Random-Access: The Case of Multiple Access Points," IEEE Trans. Comm., Aug. 2018, pp. 3434-3443.

6..M. Mehrnoush, V. Sathya, S. Roy and M. Ghosh, ``Analytical Modeling of WiFi and LTE-LAA Coexistence: Throughput and Impact of Energy Detection Threshold," IEEE/ACM Trans. Networking, Aug. 2018, pp. 1990-2003.

7.X. Ying, M. Buddhikot and S. Roy, ``SAS-Assisted Coexistence-Aware Dynamic Channel Assignment in CBRS Band," IEEE Trans. Wireless Comm., Sep. 2018, pp. 6307-6320.

8.M. Mehrnoush, S. Roy, V. Sathya and M. Ghosh, ``On the Fairness of Wi-Fi and LTE-LAA Coexistence," IEEE Trans. Cognitive Comm. & Networking, Dec. 2018, pp. 735-748.

9.S. Gopal, S. K. Kaul and S. Roy, ``Optimizing City-wide WiFi Networks in TV White Spaces," IEEE Trans. Cognitive Comm. & Networking, vol. 4, 2018, pp. 749-763.

10.S. Roy and M. Mehrnoush, ``A New Poisson Process Based Model for LOS/NLOS Discrimination in Clutter Modeling," IEEE Trans. Antennas & Prop., 2019 (to appear).