SDI Seminar

Speaker: Raj Jain, The Ohio State University

Date: March 19, 1998

Traffic Management of Internet Protocols on ATM Networks


Traffic Management is the key feature of ATM that distinguishes it from current networking protocols and makes it suitable for deployment in high-speed networks and for providing performance guarantees in an integrated environment.

ATM Forum has developed Available Bit Rate (ABR) service for fair allocation of unused capacity to data traffic. The standard gives considerable flexibility to switch designers in implementing their own resource allocation algorithms. We have been instrumental in the design and development of the service and have developed resource allocation algorithms.

While ATM Forum has designed ABR for data traffic, much of IP traffic currently uses the unspecified bit rate (UBR) service. The two services will be compared in terms of performance and buffering. Ways to improve the performance on ATM networks will also be presented.

We will also briefly discuss other ATM related research at the Ohio State University.


Raj Jain is a Professor of Computer Information Sciences at The Ohio State University in Columbus, Ohio. Currently he is very active at the ATM Forum and has influenced its directions on performance testing and traffic management considerably.

Raj Jain received a Ph.D. degree in Computer Science from Harvard in 1978 and has taught graduate courses at Massachusetts Institute of Technology. He is author of award winning book entitled ``Art of Computer Systems Performance Analysis,'' published by Wiley and ``FDDI Handbook: High-Speed Networking with Fiber and Other Media'' published by Addison Wesley.

He is an IEEE Fellow and an ACM Fellow. He is on the Editorial Boards of Computer Networks and ISDN Systems, Computer Communications (UK), Journal of High Speed Networking (USA), and Mobile Networks and Nomadic Applications (NOMAD).

Raj Jain is on the Board of Directors of MED-I-PRO Systems, LLC, Pamona, CA, and on the Board of Technical Advisors to Nexabit Networks Westboro, MA. He is also a consultant to several networking companies.