Education
Areas of Interest
Wireless communications and networking, hardware security, software security, and wireless security protocols, quality of service in cellular
networks, indoor wireless LAN's, OFDM, handover management, resource allocation
and scheduling, and wireless sensor networks.
Employment History
§
Summary :
o
13+ years of enabling teams to be passionate, curious, collaborate and enjoy contributing to the projects. Gained
invaluable industry experience as a visionary project and technical lead - in all
aspects of systems/software design and implementation: specifications and simulations, HW/SW partitioning, implementation,
integration and verification, system validation in MSP430s, communications and networking standards,
real-time embedded SW, body area networks, coexistence of wireless networks.
o
Technologies/Protocols: 802.11 a/b/g/n/ac/ah, BT, BLE, WiMAX, 802.15.6, 802.15.4/e, 6LowPAN, RPL, IP, TCP.
o
SW/Tools: C, Matlab, Python, OPNET, CCS, IAR, ClearCase, SVN, Git, Jenkins, Testlink, RTOS: Contiki, TI-RTOS.
o
Patents/Publications: 123 patent applications (57 granted), 2 IEEE standards, 10 journal (7 IEEE Transactions) & 39 conference papers.
o
University Relations/Volunteering: TI liaison for different university projects, NSF Panel Review (2015),
regular volunteer for STEM programs for high schools in DFW area.
Industry Experience
§
Texas Instruments, Inc., Dallas, TX,
April 2004-Present
o
Wireless Sensor Networks (2011-present):
Leading design, implementation, testing and roadmap for differentiated solutions that enable TI's Low Power RF platforms (CC26xx/CC13xx) to be IoT ready.
o
Multi-radio Coexistence (2007-2011):
Led new architecture, algorithms, simulation platform, and testbeds for evaluation of multi-radio coexistence solutions for WLAN, Bluetooth, and WiMAX technologies.
o
IEEE 802.11 Standards (2004-2007):
Led TI's MAC efforts on IEEE 802.11n and (co-led) IEEE 802.11s standardization.
§
Semiconductor
Research Corporation, Trustworthy and Secure Semiconductors and Systems (T3S), Durham, NC,
2015-Present
- T3S focuses on tools, techniques, and strategies for the design and manufacture of
trustworthy chips and systems.
o
Co-chair (2018-present):
Setting and implementing strategic directions for T3S and reviewing and providing feedback on T3S projects.
o
Technical Advisory Board Member (2015-present):
Reviewing and providing feedback on T3S projects and on strategic directions of T3S.
Academic Experience
§
Research Associate, Department of Electrical
and Computer Engineering, Carnegie Mellon University,
Pittsburgh, PA, October
2003-March 2004
o Performing
research on resource allocation and scheduling in wireless networks and
occasionally giving lectures on Optical Communications Network
§
Research Assistant, Center for Wireless
and Broadband Networking, Department of Electrical and Computer Engineering,
Carnegie Mellon University, Pittsburgh, PA, January
2002 - August 2003
o
Project: “High-speed internet via HVAC ducts”
-
Identify network
issues and feasible solutions for indoor wireless networks that use HVAC ducts
§
Teaching Assistant, Department of
Electrical and Computer Engineering, Carnegie
Mellon University,
Pittsburgh, PA, Fall 2002 –
Spring 2003
o
Courses: Wireless Networks, Data
Telecommunications Networks.
-
Responsibilities
include: recitations, designing/grading homework and exams
§
Project Engineer, Center for Wireless and
Broadband Networking, Department of Electrical and Computer Engineering,
Carnegie Mellon University, Pittsburgh, PA, January
2001 – December 2001
o
Project: “High-speed internet via HVAC ducts”
-
Perform
theoretical research and make field measurements on assessment of the practical
channel capacity of HVAC ducts and designing of “radio-friendly” ducts.
-
Theoretical and practical implementations issues of
OFDM in HVAC ducts
-
Write and implement an OFDM simulator
§
Research Engineer, Nokia Networks, Pittsburgh, PA,
August 2000 – December 2000
o
Project: “GPRS-136/HS network dimensioning and
planning”
-
Developed a general framework for network dimensioning
in GPRS-136
-
Developed network dimensioning tool software in MATLAB
-
An optimum algorithm for network planning was presented
-
Practical guidelines were provided for GPRS-136 network
planning
§
Research Engineer, Clearwire
Technologies, Buffalo, NY, Summer 1999
o
Project: Fixed Wireless Internet Access via Clearwire Radios
-
Tested the wireless radio protocol of Clearwire Technologies
-
Suggested and improved the performance of the wireless
radio protocol for Internet traffic
§
Lecturer, University at Buffalo, Upperbound
Program, Summer 2000
o
Course: Introduction to Internet
-
Prepared the
incoming freshman computer surviving skills to excel in the university
environment
-
Hosting weekly
lectures, prepare course plan, design projects and exams
-
Topics Covered:
Web Design, E-mail Systems, UNIX/Windows Systems
§
Lecturer, University at Buffalo, LS AMP, Summer
2000
o
Course: Research Methods
-
Taught graduating seniors how to become successful
researcher
-
Topic Covered: Types of reality, human inquiry,
deductive and inductive theory construction, causality, obtrusive and
unobtrusive research, variations in experimental design.
§
Lecturer, University at Buffalo, Fall
1999
o
Course: Probability and Statistic Inference for
Engineers
-
Taught juniors
the concepts of probabilities and application to research
-
Hosting weekly
lectures, prepare course plan, design exams and homework
-
Topics Covered:
Concepts of probability, one random variable, two random variables, conditional
distributions, statistics and hypothesis testing.
§
Teaching Assistant, University at Buffalo, Fall 1997- Spring 2000
o
Courses: Telecommunication and Data Networks,
Applied Probability and Statistics, Digital Principles, Circuit Analysis
-
Responsibilities include: recitations,
designing/grading homework and exams
§
Research Assistant, Eastern Mediterranean University, Spring
1997
o Project
"Use of error correcting codes in Code Division Multiple Access (CDMA)
Multi-user Detection"
-
Developed an algorithm to study the performance of
error correcting codes in CDMA Multi-user detection.
Publications
Journal
Papers
- D. Niyato, M. Maso, D. I. Kim, A. E. Xhafa, M. Zorzi, and A. Dutta, Guest Editorials for “Practical Perspectives on IoT in 5G Networks:
From Theory to Industrial Challenges and Business Opportunities”, IEEE Communications Magazine,
vol. 55, issue 2, pp. 68-69, Feb. 2017.
- B. Martinez, X. Vilajosana, I. H. Kim, J. Zhou, P. Tuset-Peiro, A. E. Xhafa, D. Poissonnier, and X. Lu, “I3Mote: An Open Development Platform for the
Intelligent Industrial Internet”, Sensors, MDPI,
vol. 17, no. 5, pp. 986, 2017.
- A. E. Xhafa, A. Batra and A. Zaks, “On the 20/40 MHz
coexistence of overlapping BSSs in WLAN”, Academy Publishing Journal of Networks,
vol. 3, no. 7, pp. 56-63, July 2008.
- A. E. Xhafa and O.
K. Tonguz, “Handover performance of priority schemes in pcs networks”, IEEE Transactions on Vehicular
Technology, vol. 57, no. 1, pp. 565-577, Jan. 2008.
- A. E. Xhafa, O. K.
Tonguz, A. G. Cepni, D. D. Stancil, P. V. Nikitin, and D. Brodtkorb, “On the capacity limits of HVAC duct
channel for high-speed Internet access”, IEEE Transactions on
Communications,
pp. 335-342, vol. 53, no.
2, February 2005.
- A. E. Xhafa and O.
K. Tonguz, “Dynamic priority queuing of handover calls in wireless
networks: An analytical framework”, IEEE Journal on Selected Areas on
Communications, special issue on Advanced Mobility Management and QoS Protocols for Next Generation Wireless Internet,
vol. 22, no. 5, pp. 904 – 916,
June 2004.
- O. K. Tonguz, A. E.
Xhafa, D. D. Stancil, A. G. Cepni, P. V. Nikitin, and D. Brodtkorb, “A simple path loss prediction model for
HVAC systems”, IEEE Transactions on Vehicular Technology, vol. 53, no. 4, pp. 1203-1214, July 2004.
- P. V. Nikitin, D. D.
Stancil, O. K. Tonguz, A. E. Xhafa, A. G. Cepni, and D. Brodtkorb, “HVAC duct system as an indoor wireless
communication channels: impulse response characteristics”, IEEE
Transactions on Communications, pp.
1736-1742, vol. 51, no. 10, Oct. 2003.
- P. V. Nikitin, D. D.
Stancil, A. G. Cepni, A. E. Xhafa, O. K. Tonguz, and D. Brodtkorb, “Novel mode content analysis technique for
antennas in multimode waveguides”, IEEE Transactions on Microwave
Theory and Techniques, vol. 51, no. 12, pp. 2402-2408, December
2003.
- P. V. Nikitin, D. D.
Stancil, A. G. Cepni, O. K. Tonguz, A. E. Xhafa, and D. Brodtkorb, “Propagation model for HVAC duct as a
communication channel”, IEEE Transactions on Antennas and Propagation,
vol. 51, no. 5, pp. 945-951, May 2003.
- O. K. Tonguz and A. E.
Xhafa, “Improving handover performance in wireless networks: dynamic
priority queuing versus guard channel method”, IEE Electronics Letters,
vol. 38, no. 7, pp. 338-339, March 2002.
Conference
Papers
- X. Lu, I. H. Kim, A. E. Xhafa, J. Zhou and K. Tsai,
“Reaching 10-years of battery life for industrial IoT wireless sensor networks”,
IEEE Symposium on VLSI Circuits, pp. 66-67, 2017.
- X. Lu, I. H. Kim, A. E. Xhafa, and J. Zhou,
“WSN for Machine Area Network applications”,
42nd European Solid-State Circuits Conference (ESSCIRC), pp. 31-36, 2016.
- X. Lu, I. H. Kim, A. E. Xhafa, and J. Zhou,
“WSN for Machine Area Network applications”,
46th European Solid-State Device Research Conference (ESSDERC), pp. 23-28, 2016.
- C-F. Shih, A. E. Xhafa, and J. Zhou,
“Practical Frequency Hopping Sequence Design for Interference Avoidance in IEEE 802.15.4e TSCH Networks”,
IEEE International Conference on Communications (ICC), 2015.
- J. Zhou, A. E. Xhafa, et al.,
“Comparison of IEEE 802.15.4e MAC Features”, IEEE World Forum on Internet of Things, (WF-IoT), 2014, pp. 203-207.
- A. E. Xhafa, B. Campbell, and S. Hosur,
“Towards a perpetual wireless sensor node”, IEEE Sensors 2013.
- A. E. Xhafa, X. Lu, R. Nuzzaci, and J. Zhou,
“Performance of DMSA Algorithm in Hybrid Sensor Networks”, IEEE Sensors 2013.
- A. Kandhalu, A. E. Xhafa, and S. Hosur,
“ Towards bounded-latency Bluetooth Low Energy for in-vehicle network cable replacement”,
International Conference on Connected Vehicles and Expo (ICCVE), 2013,
pp. 635-640.
- D. Waters, M. Mansour, and A. E. Xhafa,
“WLAN Scanning Strategies for RSS-Based Positioning”, IEEE Global Commmunications Conference (GLOBECOM) 2013,
pp. 493-497.
- A. E. Xhafa and Y. Sun,
“Mechanisms for Coexistence of Collocated WLAN and Bluetooth in the Same Device”,
International Conference on Networking and Communications (ICNC) 2013, pp. 905-910.
- D. Waters, M. Mansour, and A. E. Xhafa, “Analysis of Indoor Localization Game”,
IEEE Global Communications Conference (GLOBECOM), 2012, pp. 4350-4355.
- D. Waters, A. E. Xhafa, R. Vedantham, and K. Ramasubramanian, “Fine-Time Assistance for GNSS using Wi-Fi”,
International Conference on Indoor Positioning and Indoor Navigation (IPIN) 2011.
- A. Batra and A. E. Xhafa, “An Overview of IEEE 802.15.6”, Berkeley Wireless Research Center (BWRC)
Sensor Workshop, June 2011.
- A. E. Xhafa, X. Lu, and D. P. Shaver, “Coexistence of collocated IEEE 802.11 and
Bluetooth technologies in 2.4 GHz ISM band”, International Conference on Access Networks, Las Vegas, Oct. 2008.
- A. E. Xhafa, A.
Batra and A. Zaks, “On the Coexistence of Overlapping BSSs
in WLANs”, IEEE Vehicular Technology
Conference (VTC) Fall 2007, pp. 189-193, Baltimore, MD, Sept. 2007.
- A. E. Xhafa, S.
Kangude, and X. Lu, “MAC performance of IEEE 802.16e”, IEEE Vehicular
Technology Conference (VTC) Fall 2005, Vol. 1, pp. 685 - 689, Dallas, TX,
Sept. 2005.
- A. E. Xhafa, P.
Sonthikorn, and O.
K. Tonguz, “Handover in indoor wireless networks that use HVAC ducts:
Analysis and impacts”, IEEE Global Communications Conference,
(GLOBECOM), Vol. 2, pp. 903
- 907, Dallas, TX, Dec. 2004.
- A. E. Xhafa and O.
K. Tonguz, “Extending WLAN coverage via utility pipes”, IEEE Vehicular
Technology Conference (VTC) Fall 2004, Vol. 2, pp. 1093 - 1097, Los
Angeles, CA, 26-29 Sept. 2004.
- A. G. Cepni, D. D. Stancil,
A. E. Xhafa, P. V. Nikitin, O. K. Tonguz, and D. Brodtkorb, “Capacity of multi-antenna array systems
for HVAC ducts”, IEEE International Conference on Communications (ICC), vol. 5, pp. 2934-2938, Paris, France, 20-24 June 2004.
- A. E. Xhafa and O.
K. Tonguz, “Does mixed lognormal distribution channel holding time affect
the handover performance of guard channel scheme?” IEEE Global
Communications Conference (GLOBECOM), vol. 6, pp. 3452-3456, Dec. 1-5, San Francisco,
CA, USA,
2003.
- A. E. Xhafa, P.
Sonthikorn, O. K. Tonguz, P. V. Nikitin, A. G. Cepni, B. Henty, D. Stancil, and D. Brodtkorb,
“Seamless handover in buildings using HVAC ducts: A new system
architecture”, IEEE Global Communications Conference
(GLOBECOM), vol. 6, pp.
3093-3097, Dec. 1-5, San Francisco, CA, USA, 2003 .
- D. D. Stancil, P. V.
Nikitin, A. G. Cepni, A. E. Xhafa, O. K. Tonguz, B. Henty, and D. Brodtkorb, “RF
channel properties of heating and ventilation ducts”, Progress In Electromagnetics
Research Symposium Program (PIERS), October 13–16, 2003 Honolulu, Hawai, USA.
- A. E. Xhafa and O.
K. Tonguz, “Reducing handover time in heterogeneous networks”, IEEE
Vehicular Technology Conference (VTC) Fall 2003,
vol. 4, pp. 2222-2226, 6-9 Oct. 2003.
- P. V. Nikitin, D. D.
Stancil, A. G. Cepni, A. E. Xhafa, O. K. Tonguz, K. Areklett, and D. Brodtkorb,
“Antennas in waveguide propagation environment”, IEEE Antennas and
Propagation Symposium 2003, vol. 2, pp. 1181-1184, June 22-27, 2003.
- P. V. Nikitin, D. D.
Stancil, A. G. Cepni, A. E. Xhafa, O. K. Tonguz, and D. Brodtkorb, “Propagation modeling of complex HVAC
networks using transfer matrix method”, IEEE Antennas and Propagation
Symposium 2003, vol. 2, pp. 126-129, June 22-27, 2003.
- P. V. Nikitin, D. D.
Stancil, A. G. Cepni, A. E. Xhafa, O. K. Tonguz, and D. Brodtkorb, “Novel mode content analysis technique for
multimode waveguide”, IEEE Microwave Symposium 2003, vol. 3, pp.
1827-1830, June 8-13, 2003.
- P. V. Nikitin, D. D.
Stancil, O. K. Tonguz, A. E. Xhafa, A. G. Cepni, and D. Brodtkorb, “RF propagation in an HVAC duct system:
impulse response characteristics of the channel”, IEEE Antennas and
Propagation Symposium (APS), vol. 2, pp. 726-729, 2002.
- A. G. Cepni, A. E. Xhafa,
P. V. Nikitin, D. D. Stancil, O. K. Tonguz, and D. Brodtkorb,
“Multicarrier signal transmission through HVAC
ducts: Experimental results for channel capacity”, IEEE Vehicular
Technology Conference (VTC) Fall 2002, vol. 1, pp. 331-335, 2002.
- O. K. Tonguz, D. D.
Stancil, A. E. Xhafa, A. G. Cepni, P. V. Nikitin, and D. Brodtkorb, “An empirical path loss model for HVAC duct
channel”, IEEE Global Communications Conference (GLOBECOM),
vol. 2, pp. 1850-1854, Taipei, Taiwan, 2002.
- A. E. Xhafa, O. K.
Tonguz, A. Cepni, D. Stancil, P. Nikitin, and D. Brodtkorb,
“Theoretical limits of HVAC duct channel capacity for high-speed Internet
access”, IEEE International Conference on Communications (ICC),
vol. 2, pp. 936-939, New York, 2002.
- D. D. Stancil, O. K.
Tonguz, A. E. Xhafa, A. G. Cepni, P. V. Nikitin, and D. Brodtkorb, “High Speed Internet via HVAC Ducts: A New
Approach”, IEEE Global Communications Conference (GLOBECOM),
vol. 6, pp. 3604-3607, San Antonio, Texas, Nov. 2001.
- A. Xhafa and O. K.
Tonguz, “A New Queuing Scheme for Handoffs in 3G Wireless Networks”, IEEE
Vehicular Technology Conference (VTC) Fall 2001),
pp. 738-742, Atlantic City,
USA, Oct.
2001.
- A. Xhafa and O. K.
Tonguz, “Handoff Priority in Voice/Data Integrated Wireless Networks”, International
Conference on Telecommunications(ICT),
pp. 273-278, Bucarest,
Romania,
June 2001.
- A. Xhafa and O. K.
Tonguz, “Dynamic Priority of Handoff Requests in PCS”, IEEE
International Communications Conference (ICC), pp. 341-345, Helsinki, Finland, June 2001.
- A. Xhafa and O. K.
Tonguz, “Performance of Delay-Dependent Queuing of Handoff Requests with 2
and 3 Priority Classes in PCS”, IEEE Vehicular Technology Conference
(VTC) Spring 2001, pp. 946-950, Rhodes, Greece, May 2001.
- A. Xhafa and O. K.
Tonguz, “Dynamic Priority Queuing, Channel Borrowing, and First In First
Out Handoff Schemes: A Performance Comparison”, IEEE Vehicular
Technology Conference (VTC) Spring 2001, pp. 951-955, Rhodes, Greece, May 2001.
- O. K. Tonguz, S. Maloo, A. Xhafa, and S. Sheeshia,
“Internet Access via LEO Satellite Networks: TCP/IP or ATM?”, IEEE
Global Communications Conference (GLOBECOM), pp. 301-305, Rio de Janeiro, Brasil, Dec. ‘99
- S. Maloo,
S. Sheeshia, A. Xhafa, and O. K. Tonguz,
“LEO Satellite Networks: Ethernet or ATM?”, IEEE
Personal, Indoors and Mobile
Radio Communications Conference (PIMRC), pp. 494-497, Sept. ’99.
- A. Xhafa and O. K.
Tonguz, “Dynamic Priority Queuing of Handoff Requests in Personal
Communication Systems: An Analytical Framework for Performance
Evaluation”, IEEE Personal, Indoors and Mobile Radio Communications Conference
(PIMRC), pp. 1346-1350, Sept. ’99.
Technical Reports
- D. D.
Stancil, O. K. Tonguz, P. V. Nikitin, A. E. Xhafa, and A. G. Cepni,
“Assessment of Building HVAC Ducts as High-Bandwidth Communications
Channels”, CMU Technical Report, 2001
- O. K. Tonguz
and A. E. Xhafa, “GPRS Core Network Dimensioning: A Roadmap”, SUNY
at Buffalo
Technical Report, 2000
- O. K. Tonguz,
A. E. Xhafa, and P. Roychowdhury,
“Performance Evaluation of First Generation Clearwire
Radios”, SUNY at Buffalo Technical Report, 1999
Honors & Awards
- Senior Member Technical Staff (SMTS), 2014
- Member Group Technical Staff (MGTS), 2011
- IEEE Senior Member, 2010
- Carnegie
Mellon University,
Graduate Conference Fund, 2003
- IEEE Merit-based Student Travel Grant for Global
Communications Conference, San
Francisco, CA,
2003
- Who’s who among students in American Universities
and Colleges, 1998, 1999
- Scatcherd
European Scholarship to pursue graduate studies at University of Oxford,
1997 (Declined :-) )
- Awarded on the basis of academic performance, proposal for research, and
letters of recommendation
- Eastern Mediterranean University Scholarship, North Cyprus, 1992-1997
- Awarded on the basis of academic performance.
- Polytechnic University of Tirana Scholarship,
Tirana, Albania, 1991-1992
- Awarded on the basis of academic performance.
- Golden
Medal for Excellence, Vlora, Albania,
1991
- Awarded on the basis of academic performance in high school and as a
winner in regional and national competitions in Mathematics and Physics.
Extra Curricular Activities Awards
- North Texas Soccer Association
Champions, 2012
- Inwood
Soccer Champions, Dallas,
TX, Summer 2004, Winter
2007, Summer 2007, Spring 2015
- Carnegie Mellon University Outdoor Soccer Champions, Pittsburgh,
PA, Fall 2001
- University
at Buffalo Outdoor Soccer Champions, Buffalo,
NY, Summer’2000
- MVP, West
Seneca Soccer League, Buffalo, NY,
Summer ’99
- West Seneca Soccer League Champions, Buffalo,
NY, Summer’99
Professional Activities
- Worked on IEEE 802.11n, 802.11s, 802.15.4q and 802.19 Standards
- Technical Program Committee member for: IEEE ICC, IEEE WCNC, IEEE
INFOCOM MOVE, AccesNet’06, IEEE GLOBECOM, IEEE VTC.
- Session Chair for
Access Control and Protocols/ Wireless Networks/ Sensor Networks, IEEE VTC Fall 2004, Globecom 2003, 2010, 2011, 2012, 2014, ICC 2012
- Reviewer for
IEE Electronics Letters, IEE Proceedings on Communications,
Kluwer Wireless Personal Communications, IEEE Transactions on Vehicular Technologies,
IEEE Transactions on Wireless Series, IEEE Transactions on Communications, IEEE International Conference on Communications, IEEE Proceedings on Communications,
IEEE Transactions on Vehicular Technology,
and Kluwer Wireless Personal Communications.
- Member of IEEE Communications and Vehicular Technology Societies 1998 - present.
- Member of IEEE Computer Society 2003-present.
- Member of Eta Kappa Nu
Extra Activities
-
Volunteer soccer coach, Plano Sports Authority (PSA), 2017-present
- Member of Pittsburgh Council
for International Visitors, Fall 2002 – April 2004
- Volunteer on
EGO activities in ECE Department at Carnegie Mellon
University,
September 2000 – March 2004
- Team Captain
for “Los Chavos”, Greater Pittsburgh Soccer League, Summer 2002
- Participated in
intramural soccer tournaments at University at Buffalo
and Carnegie
Mellon University,
Fall 1999 – Spring 2004
Contact
Ariton Xhafa
E-mail: arxhafa.at.yahoo.com
(Last updated: July 30, 2015)
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