Marvin Sirbu

Professor – EPP Courtesy Professor – ECE
Office 129K Baker Hall
Telephone (412)-268-3436
Fax (412)-268-3757

Research Interests

Telecommunications Convergence

Telecommunications networks have histori-cally been optimized for voice traffic. Over the next decade, the world's networks will be dominated by data traffic, and voice will be carried as just one more type of data on integrated service packet networks. We are exploring the impacts of this convergence on telecommunications regulation and competition. More specifically, we are developing engineering economic models to alternative network architectures to examine issues of comparative economics, economies of scale and scope, and the impact of regulatory policies governing competitive entry, unbundling, interconnection and universal service. Particular attention is being focused on voice over internet protocol (VoIP) and its impact on local exchange competition, and the regulatory treatment of telecommunications and information services. Practical experience in operating VoIP systems is being gained through an instrumented testbed.

Network Economics

On a gigabit network, if service is priced per bit sent, then either voice is effectively free or video is unaffordable. Flat-rate access leads to casual users subsidizing intensive users. Professor Sirbu is developing formal models for network supply and demand that can lead to efficient and practical pricing structures.

In the News

  • ECE Experts Available to Speak on Primary Issues
  • Sirbu Predicts Consumers May See Fewer Price Breaks Under FCC Ruling
  • Peha and Sirbu Cited in Washington Technology for Wireless Breakthroughs
  •  Marvin  Sirbu

    Carnegie Mellon, 1985

    Research Area

    Device Science and Nanofabrication


    Telecommunications policy and economics


    DSc, 1973
    Electrical Engineering
    Massachusetts Institute of Technology

    MS, 1968
    Electrical Engineering
    Massachusetts Institute of Technology

    BS, 1967
    Massachusetts Institute of Technology

    BS, 1966
    Electrical Engineering
    Massachusetts Institute of Technology