Carol Davids

  • Research Assistant Professor Professor, Computer Science
  • Founding Director, Real-Time Communications Lab


Bachelor of Science, Applied Mathematics, Columbia University, School of Engineering and Applied Science, New York, NY, 1967
Master of Science, Information Technology and Management, Illinois Institute of Technology, Chicago, IL, 2003

Research Interests

Real-Time Communications, including SIP-based, and WebRTC-based architectures and applications; voice and data networks; voice and video communications

Professional Affiliations & Memberships

1) Life Member, Institute of Electrical and Electronics Engineers (IEEE)

2) Member, Association of Computing Machinery (ACM)

3) Co-Chair and Steering Committee Co-Chair, Principles, Systems and Applications of IP Telephony (IPTComm)

4) Chair, Real-Time Communication Conference and Expo, an International IEEE Conference at Illinois Tech


University Teaching Award


Determining the Indoor Location of an Emergency Caller in a Multi-story Building
Luke Logan, Carol Davids, Cary Davids;
May, 2020 IEEE International Workshop Technical Committee on Communications Quality and Reliability (CQR); IEEE XPlore

Dispatchable Indoor Location System for Mobile Phones based on a BlueTooth Low Energy Array 
Carol Davids, Cary Davids, Bharat Ramaswamy Nandakumar, Neilabh Okhandiar, Francisco Rois, Chakib Ljazouli, Adrian Calle Murillo
September 2017, IPTComm '17: Proceedings of the Principles, Systems and Applications on IP Telecommunications; IEEE Xplore.

Real Time Communications in the Web: Current Achievements and Future Perspectives
Simon Pietro Romano; Salvatore Loreto; Carol Davids
IEEE Communications Standards Magazine
Year: 2017, Volume: 1, Issue: 2
Pages: 20 - 21
IEEE Journals & Magazines

Next Generation 911: Where Are We? What Have We Learned? What Lies Ahead? 
Eds. Carol Davids, Vijay K. Gurbani, Salvatore Loreto, Ravi Subramanyan
IEEE Communications Magazine
Year: 2017, Volume: 55, Issue: 1
Pages: 130 – 131, DOI: 10.1109/MCOM.2017.7823350

Dispatchable Indoor Location for Mobile Phones Calling for Emergency Services
Carol Davids, Javier Moreno Valdecantos, Bartlomiej Dworak, Cruz Tovar, Bharat Ramaswamy Nandakumar, Mahak Patil
October 2015 IPTComm '15: Proceedings of the Principles, Systems and Applications on IP Telecommunications; ACM Digital Library

Benchmarking the session initiation protocol (SIP)
Yueqing Zhang; Arthur Clouet; Oluseyi S. Awotayo; Carol Davids; Vijay K. Gurbani
2015 IEEE International Workshop Technical Committee on Communications Quality and Reliability (CQR), IEEE Xplore

Real-time communications: topics for research and methods of collaboration
Carol Davids, Gaston Ormazabal, Radu State
July 2014 ACM SIGCOMM Computer Communication Review: Volume 44 Issue 3, July 2014

SIP APIs for voice and video communications on the web
Carol Davids, Alan Johnston, Kundan Singh, Henry Sinnreich, Wilhelm Wimmreuter
July 2011 IPTcomm '11: Proceedings of the 5th International Conference on Principles, Systems and Applications of IP Telecommunications; ACM Digital Library

SIP CLF: a common log format (CLF) for the session initiation protocol (SIP)
Vijay K. Gurbani, Eric Burger, Carol Davids, Tricha Anjali
SLAM’L10 Proceedings of the 2010 workshop on Managing systems via log analysis and machine learning techniques, ACM Digital Library

The IIT VoIP Research Lab projects and their relationship to VoIP standards development 
Proc. 6th International Conference on Standardization and Innovation in Information Technology (SIIT 2009). The Institute of Electronics, Information and Communication Engineers, September 2009.

A study of an open source IP multimedia subsystem test bed
Jin Tang, Carol Davids, Yu Cheng
July 2008 QShine '08: Proceedings of the 5th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness; ACM Digital Library

Internet Engineering Task Force (IETF) Requests for Comment (RFC)
Terminology for Benchmarking Session Initiation Protocol (SIP) Devices: Basic Session Setup and Registration, , April 2015

Methodology for Benchmarking Session Initiation Protocol (SIP) Devices: Basic Session Setup and Registration, , April 2015


SIP Performance Benchmarks: Methodology, Terminology for finding the "performance knee" of a SIP Proxy instance. Draft at IETF BMWG. Test tool conformant with the drafts.

NG9-1-1: NENA Industry Collaboration Events: Collaboration with the National Emergency Numbers Association to support interoperability of functional elements of the NG9-1-1 architecture. Maintenance and growth of three Emergency Services IP backbone networks on the two IIT campuses.

Network Transport and Performance Testbed: STUN and TURN servers as well as SIP servers and WebRTC-enabled Web Servers are deployed in various configurations of this test bed whose nine domains and sub-domains can be used to test the behavior of Web-RTC-based and SIP-based applications as they traverse the domains with the help of the STUN and TURN services.

Voice over IIT: This on-going lab project is a working SIP-based IP-Telephony system using Kamailio ad Asterisk servers and connected to the PSTN by a SIP Trunk.


“Method for Securing Streaming Multimedia Network Transmissions”, US Patent Number 8453241, granted May 28, 2013.

European Telecommunications Standards
Co-author, as a member of Specialist Task Force (STF)–216 at the European Telecommunications Standards Institute (ETSI) various VoIP Specifications, including:
TS101 909 Part 4, Network-based Call Signaling specification, April 2006
TS101 909 Part 16, CMS-to-CMS Signaling specification, December 2004
TS101 909 Part 23, Line Control Signaling specification and other parts of TS101 909., December 2002

CableLabs, Packet Cable Project
Co-author, as an IPR Vendor at CableLabs, Packet Cable Project, various VoIP specifications, including:
PKT-SP-CMSS: CMS-to-CMS Signaling Specification, January 2005
PKT-SP-EC-MGCP: NCS Signaling Specification, March 1999

Additional Info


June 2003 – Present: Illinois Institute of Technology:
Industry Professor, School of Applied Technology
Director, Real-Time Communications Lab

April 2002 – present: Davids Consulting:
Telecommunications Consulting Engineer: Network evaluations, feasibility studies and course development and presentation

November 1998- April 2002: Tellabs Operations, Broadband Media Group, Cablespan Division:
Staff Engineer, Systems Engineering Group
Staff Engineer, Validation and Test Group

 July 1995 – November 1998: Motorola, CableComm Division:
Lead Engineer, Validation and Test Group

October 1972 – November 1994 (Retired): Ameritech/Illinois Bell, AT&T:
Various technical assignments related to data transmission and call processing


Area(s) of Advisement

Voice & Data Communication Technology