APOSTOLOS K. KAKAES
`Cosmos Communications Consulting Corporation, President
`908 Park St. SE, Suite 201
`Vienna, Virginia 22180
`703-310-6076 (Office); 703-981-0999 (Mobile);
`e-mail: akakaes@gmail.com
`
`AREAS OF EXPERTISE
`
`All aspects of fixed and mobile communications. Over the years, my emphasis has
`been both in breadth and in depth, originally in fixed communications networks and then
`in mobile communications. Specific areas of in-depth expertise include:
`• LTE, LTE-Advanced, 5G and evolution issues to 3G, to 4G, and to 5G
`• UMTS, including FDD, TDD, HSDPA/HSUPA, HSPA+, both air interface (UTRA)
`and Radio Access Network (RAN) as well as Core Network (CN) technologies
`• GSM, GPRS, EDGE (EGPRS) and related evolutionary problems and solutions
`• cdma2000 family from IS-95, through its evolution to 1x, 3x, 1xEV-DO (HDR),
`1xED-DV (all aspects of the evolution to “3G” and beyond)
`• Wired and Wireless Local Area Networks (LAN) including all variants of IEEE
`802.11 (WiFi)
`• Metropolitan Area Networks (MAN), and Personal Area Networks (PAN)
`technologies, Paging networks, Ad hoc networks, including IEEE 802.16
`(WiMAX), HIPERLAN, Bluetooth, Near Field Communications, IrDA (Infrared Data
`Association) operating with any of the available access technologies
`• North American TDMA and IS-54/IS-136
`•
`IMS, SIP, and VoIP (Voice over IP), including VoIP over LTE
`• TETRA
`•
`iDENTM
`• Core Network technologies, IS-41, SS7, ATM, MAP, SAE, etc.
`• Design and implementation of voice and data networking (circuit switching as
`well as all the evolving all IP-based technologies)
`• Traffic engineering and network design; both air interface aspects (including
`resource allocation, QoS, MAC protocol, etc.) and design of core network, both
`user plane and control plane
`
`EMPLOYMENT HISTORY
`
`9/88 – Present
`Cosmos Communications Consulting Corporation. Founder and president of private
`communications engineering consulting firm specializing in mobile communications.
`Initially part time; full time since 1994.
`
`• Developed and presented courses, seminars, and lectures on fixed and mobile
`communications to both corporate and government entities, such as the FCC and
`the US Marshal’s Office.
`• Consulted on high level technology-related issues and trends, pros and cons of
`each, etc. to corporate entities, governmental agencies, and international
`organizations, such as the UN.
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`• Consulted at the detailed technical level to engineering firms, operators, and
`equipment vendors on technical issues related to existing or evolving technologies
`for mobile communications.
`• Served as technology consultant to the investment community on issues related
`to both fixed and wireless communications technologies.
`• Served as consultant and/or testifying expert witness on both civil and criminal
`legal cases, including a class action lawsuit brought in California, a murder case
`in Illinois, and several patent infringement cases both at the ITC and in district
`courts, both in the USA and abroad.
`• Served as consultant and/or testifying expert witness on several Inter-Parte Re-
`examinations (IPRs).
`• Served as consultant and/or testifying expert witness in multiple legal
`proceedings involving the determination of “FRAND” rates for global licenses
`involving “SEP” patents both in the USA and in Europe.
`• Participated as a technical consultant in the analysis of large patent portfolios for
`the purposes of due diligence, sales, and/or M/A activities for some of the largest
`companies in the mobile communications space.
`
`These projects spanned a multidimensional spectrum of
`• Technologies: both fixed and mobile communications as they have evolved over
`the past 30+ years;
`• Audiences: non-technical support personnel, highly specialized engineers, Wall
`Street analysts, hedge fund managers, litigation teams, as well as decision
`making executives at the CEO/CFO/CTO level;
`• Geographic and cultural backgrounds that span all continents and over 40
`countries.
`
`9/87 - 5/94
`The George Washington University, Washington, D.C.; Department of Electrical
`Engineering and Computer Science.
`• Taught mostly graduate courses in the area of communication engineering,
`including communication theory, coding theory, voice and data networking, and
`mobile communications.
`• Proposed, developed and taught new graduate courses in the area of mobile
`communications.
`• Received several research awards/grants, including the prestigious NSF Research
`Initiation Award.
`• Participated in several committees, including the departmental Graduate
`Curriculum Committee as well as various University-wide committees.
`
`7/85 - 12/86
`Polytechnic Institute of New York, Brooklyn, New York. Joint appointment as Special
`Research Fellow and Adjunct Instructor (while pursuing the Ph.D. degree)
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`1/82 - 7/87
`AT&T Bell Laboratories, Holmdel, New Jersey. Worked on modeling, analysis, design,
`and performance evaluation of voice and data networks. Developed algorithms for
`DNHR (Dynamic, Non-Hierarchical Routing) used in the telephone network. Analysis of
`advanced data services and formulation of long term plans for development of enhanced
`data services and network design tools to support such services.
`
`7/76 - 12/81
`University of Colorado, Boulder, Colorado and Michigan State University, East Lansing,
`Michigan. Undergraduate and then graduate teaching assistant.
`
`EDUCATION
`
`09/82 - 01/88
`Polytechnic Institute of New York.
`Ph.D. in Electrical Engineering with a minor in Applied Mathematics.
`
`Thesis Title: “Topological Properties and Design of Multihop Packet
`Radio Networks”.
`Thesis Advisor: Professor Robert R. Boorstyn.
`
`09/74 - 06/80
`University of Colorado.
`M.S. in Applied Mathematics with a minor in Electrical Engineering.
`B.S. in Applied Mathematics with a minor in Electrical Engineering.
`
`PROFESSIONAL ASSOCIATIONS AND ACTIVITIES
`
`• Member of the IEEE (Active in the Communications Society, Vehicular
`Technology Society, and the Information Theory Society).
`• Secretary, IEEE Communications Society National Capital Area Chapter, 91/92.
`• Vice-Chair, IEEE Communications Society National Capital Area Chapter, 92/93.
`• Vice-Chair of the Communication Theory Technical Committee of the
`Communications Society of the IEEE; Elected for the 1993-1996 term.
`• Treasurer of the Communication Theory Technical Committee of the
`Communications Society of the IEEE, Elected for the 1996-1999 term.
`• Reviewer for the IEEE, book editors, and other technical publications.
`• Reviewer for various NSF Panels.
`• Active Participant and Organizer of Technical Sessions in Technical Conferences,
`including the IEEE International Conference on Communications (ICC) and IEEE
`Global Communications Conference (Globecom).
`• Technical Program Chair for the Communication Theory Mini-Conference, Dec.
`1992.
`
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`PUBLICATIONS AND PRESENTATIONS
`
`1. "Topological Properties and Design of Multi-Hop Packet Radio Networks";
`Presented at the IEEE Information Theory Society Meeting; Arlington, Virginia;
`February 1988.
`2. "Topology and Capacity of Multi-Hop Packet Radio Networks" (Joint with R.R.
`Boorstyn); 1988 International Symposium on Information Theory; Kobe, Japan;
`June 1988.
`3. "Placing Repeaters in Multi-Hop Packet Radio Networks" (Joint with R.R.
`Boorstyn); Proceeding of Globecom '89, Dallas, Texas; November 1989.
`4. "Topological Properties and Design of Packet Radio Networks"; Invited
`Presentation at the National Technical University of Athens; Athens, Greece;
`January 10, 1990.
`5. "Channel Allocation Strategies in Dual Mode Digital Cellular Networks";
`Proceedings of Globecom '90, San Diego, California; December 1990.
`6. "Bandwidth Allocation Techniques in Dual Mode Cellular Systems"; Invited
`Presentation at the Rutgers University Wireless Information Networks Laboratory
`(WINLAB); January 25, 1991.
`7. "Some Topological Properties of Different Classes of Random Graphs with
`Applications to Communication Networks", Proceedings of the IEEE Information
`Theory Symposium, Budapest, Hungary; June 1991.
`8. "The Effects of Residual Bandwidth in TDMA Cellular Networks", IEEE
`Communication Theory Workshop, Rhodes, Greece, July 1991.
`9. "Concentrators and Concentrator Design", Encyclopedia of Telecommunications,
`Fritz E. Froehlich, Editor-in-chief; Marcel Dekker, Inc, 1992.
`10.
`"Comparison of TDMA and CDMA for Cellular Networks," Ecole Nationale
`Superieure des Telecommunications, Paris, France, March 5, 1992.
`11.
`"Dual Mode Digital Cellular Networks: The Effects of Bandwidth
`Segmentation on Digital and Analog Users," Presented at the IEEE
`Communications Society Meeting, April 16, 1992.
`12.
`"Dynamic Channel Allocation and Reallocation for Dual-System Cellular
`Networks, Workshop Record, (with Sirin Tekinay and Bijan Jabbari), Third Winlab
`Workshop on Third Generation Wireless Information Networks, Piscataway, NJ,
`April 28-29, 1992.
`13.
`"Spread Spectrum Technology Applications in Telecommunications,"
`Tutorial presented at the 1992 IEEE Mohawk Valley Section Conference, June
`1992.
`"Spread Spectrum Fundamentals: Techniques and Applications", Tutorial
`14.
`(in cooperation with Giovanni Vannucci) presented at ICC'92, June 1992.
`15.
`"Global System for Mobile Communications (GSM)", Presented at ICC'93,
`Geneva, Switzerland, May 25, 1993.
`"Data Communications Basics", Encyclopedia of Software Engineering",
`16.
`John Wiley & Sons, Inc., 1993.
`17.
`"Modelling of Cellular Communication Networks with Heterogeneous
`Traffic Sources" (with Sirin Tekinay and Bijan Jabbari), Proceedings of the
`International Conference on Universal Personal Communications, 1993, October
`1993.
`18.
`
`"Global System for Mobile Communications (GSM)", Presented at the
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`Francusko-Polska Wysza Szkowa, Poznan, Poland, March 1994.
`
`"Traffic Engineering for Cellular Network Design", Presented at the
`19.
`Francusko-Polska Wysza Szkowa, Poznan, Poland, March 1994.
`20.
`"Principles of Traffic Engineering and Network Design", Presented at the
`Regional Seminar on Mobile Cellular Radio Telephone Systems, by invitation of
`the ITU, April 19, 1994.
`21.
`"Principles of Spread Spectrum Systems for Mobile Communications",
`Presented at the Regional Seminar on Mobile Cellular Radio Telephone Systems,
`by invitation of the ITU, April 20, 1994.
`22.
`"Global System for Mobile Communications (GSM)", Presented at the
`Regional Seminar on Mobile Cellular Radio Telephone Systems, by invitation of
`the ITU, April 21, 1994.
`23.
`"Global System for Mobile Communications (GSM)", Presented at ICC'94,
`New Orleans, LA.; May 1, 1994.
`24.
`"GSM and DCS1900: Evolution to PCS", ICC/Supercom 1996, Dallas,
`Texas; June 23-27, 1996.
`25.
`"Traffic Engineering Models for Mobile Communications", ICUPC96,
`Cambridge, Massachusetts; Sept. 29 - October 2, 1996.
`26.
`"GSM-Recent Advances and Future Developments", Globecom'96,
`London, UK; November 1996.
`27.
`"Advances in GSM and DCS1800/1900", ICC '97, Montreal, Canada;
`June 1997.
`28.
`"The Global System for Mobile Communications (GSM) and its Derivatives
`(DCS1800, PCS1900)", ICC/Supercom '98, Atlanta, GA; June 1998.
`29.
`"Teletraffic Engineering", Globecom '98, Sydney, Australia; November
`1998.
`30. “Traffic Engineering” in Encyclopedia of Telecommunications, Edited by John
`Proakis, John Wiley, 2002.
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`Apostolos K. Kakaes, President
`Cosmos Communications Consulting Corporation
`
`LIST OF CASES AS OF JANUARY 21, 2021
`
`Below I provide a list of cases in which I have testified as an Expert at Trial or by
`Deposition in the past 4 years, i.e., the period January 1, 2017 to January 21, 2021.
`Name of retaining company is bolded below.
`
`1. February 2017; Deposition in Eastern District of Texas case brought by Wireless
`Protocol Innovations, Inc. vs. TCT Mobile, Inc.
`
`2. August 2017; Deposition in District of Delaware case brought by Evolved Wireless
`vs. (1) HTC, (2) Lenovo & Motorola Mobility, (3) Samsung, (4) ZTE, and (5)
`Microsoft.
`
`3. July 2018; Deposition in Northern District of California District Court in ASUS
`Computer International vs. InterDigital.
`
`4. November 2018; Deposition in Eastern District of Texas in HTC v. Ericsson.
`
`5. February 2019; Jury Trial in the Eastern District of Texas District Court in HTC v.
`Ericsson.
`
`6. March 2019; Deposition in ITC case brought by INVT vs. (1) Apple, (2) HTC, and
`(3) ZTE.
`
`7. October 2019; Eastern District of Texas in Fractus S.A. vs. AT&T Mobility, T-Mobile
`USA, Verizon Communications, Inc. and CommScope Technologies LLC.
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