Telecommunications Expert Witnesses

Wired and Wireless Network Equipment

Barr Group is in the business of designing reliable and secure computers and we have software and electrical engineers with a deep understanding of datacom and telecom products and protocols, such as:

• Cellular GSM and CDMA protocols, including 3G/4G/5G and LTE
• Cellular handset design, including smartphones and mobile phones
• Cellular base station equipment and network design
• Wireless networks and standards from WiFi 802.11 a/b/g/n to WiMax
• Wired and wireless access points, switches, routers, and repeaters
• DOCSIS cable modems and "triple-play" broadband access devices
• All seven layers of the OSI (Open Systems Interconnection) model
• TCP/IP Internet protocol suite and middleware libraries/stacks
• Data center infrastructure design and operations
• Fiber-optic communications and equipment
• LANs, including IEEE 802.3 Ethernet, Industrial Ethernet, and 1GE/10GE
• Bluetooth, Zigbee, and other personal area networks (PAN)
• GPS, E-911 (Emergency 911), and geolocation technologies
• Satellite telemetry and ground-to-satellite communications
• Switched telephone networks (PSTN), PBXes, and Signalling System No. 7

Barr Group's cellular and wireless network experts are well acquainted with all of the mobile communications technologies, standards, and protocols as well as the operating systems and programming languages (such as C, C++, and assembly) used to develop datacom and telecom products. We are equally comfortable reviewing chip designs in Verilog and VHDL and, of course, electronic schematics.

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Expert Witness Services

Barr Group's cellular and wireless network experts support plaintiffs and defendants in litigation in U.S. District Courts, at the International Trade Commission (ITC), and before the Patent Trial and Appeal Board (PTAB). Our services include:

• Technical assistance with drafting of discovery requests
• Software source code review and analysis
• Source code comparisons for copyright and trade secret theft
• Prior art review for patent invalidity
• Intellectual property portfolio review and analysis
• Reverse engineering, including of electronics and binary code
• Data center and network infrastructure audits
• Analysis of network infrastructure vs industry best practices
• Root cause analysis for system failures
• Network traffic analysis, including WireShark sniffing
• Review of cyber breaches in light of security measures
• Expert reports, declarations, and witness statements
• Testimony at deposition, oral hearings, and trials

Barr Group has a demonstrated ability to quickly activate one or more code reviewers to match the size, scope, and complexity of any project.

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The following is a representative subset of Barr Group's experts who have experience designing and/or testifying about these technologies:

Who are Barr Group's Telecommunications expert witnesses?

Barr Group's Telecommunications expert witness roster holds 140 anonymized, prequalified profiles; a selection follows, and matched recommendations from the full roster are free to the attorney.

• Secure Computer Systems Expert Witness. Barr Group's embedded electronics and software expert witness has extensive product development and computer security experience and has testified in automotive product liability, software forensics, and source code intellectual property cases.
• Speech Recognition and Natural Language Processing Expert Witness. Barr Group's speech recognition and natural language processing expert witness has over three decades of experience in speech synthesis, dialogue systems, and conversational AI, and has testified in multiple federal patent infringement cases.
• Powerline Communications and Network Protocol Expert Witness. Barr Group's network protocol and powerline communications expert witness has over three decades of experience in protocol design and cryptographic security, holds 17 patents, and has testified in patent infringement matters.
• Virtual Reality Worlds & Gaming Expert Witness. Barr Group's computer graphics and video game expert witness has over forty years of experience designing software and electronics, including virtual worlds and simulation environments, and has testified as an expert witness.
• Mobile & Wireless Networks Expert Witness. Barr Group's wireless communication systems and mobile networks expert witness has testified on wireless and wireline communications technologies and standards, assessing patent portfolios, standards essential patents, and infringement and validity opinions.
• Penetration Testing Security Expert Witness. Barr Group's embedded security expert witness specializes in penetration testing, reverse engineering with tools such as IDA Pro, FPGA design in VHDL, and real-time firmware in C and assembly, and holds a security clearance.
• DOCSIS Cable Modem Expert Witness. Barr Group's DOCSIS cable modem expert witness authored the DOCSIS 1.0, 1.1 and Baseline Privacy standards, built the first MCNS cable modem, and is a named inventor on nearly one hundred U.S. patents in broadband, wireless data, mesh networking and digital video.
• Medical Image Processing Expert Witness. Barr Group's signal, image, and video processing expert witness holds a Ph.D. in electrical engineering and has experience in data compression, medical and dental diagnostic imaging including X-ray, nuclear medicine, and ultrasound, real-time embedded software, and FPGA design.
• Battery Chemistry Expert Witness. Barr Group's battery and energy storage expert witness has more than thirty years of experience in battery, materials, and control system technology and has analyzed catastrophic battery system failures to determine root causes and cascading failure modes.
• System & Software Testing Expert Witness. Barr Group's software, hardware, and systems testing expert witness has over thirty years of experience, has authored fourteen books translated into over a dozen languages, and has trained tens of thousands of people worldwide.