Raj Jain (born 17 August 1951) is a professor of
Computer Science
Computer science is the study of computation, automation, and information. Computer science spans theoretical disciplines (such as algorithms, theory of computation, information theory, and automation) to practical disciplines (includi ...
and
Engineering
Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more speciali ...
in the
Washington University School of Engineering and Applied Science at
Washington University in St. Louis
Washington University in St. Louis (WashU or WUSTL) is a private research university with its main campus in St. Louis County, and Clayton, Missouri. Founded in 1853, the university is named after George Washington. Washington University is r ...
,
Missouri
Missouri is a state in the Midwestern region of the United States. Ranking 21st in land area, it is bordered by eight states (tied for the most with Tennessee): Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas t ...
.
Education
Dr. Jain obtained a Ph.D. in Applied Mathematics (
Computer Science
Computer science is the study of computation, automation, and information. Computer science spans theoretical disciplines (such as algorithms, theory of computation, information theory, and automation) to practical disciplines (includi ...
) from
Harvard University
Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of high ...
, Cambridge, Massachusetts in 1978, an M.E. in Automation from
Indian Institute of Science
The Indian Institute of Science (IISc) is a public, deemed, research university for higher education and research in science, engineering, design, and management. It is located in Bengaluru, in the Indian state of Karnataka. The institute was ...
Bangalore, India in 1974, and a B.E. in Electrical Engineering from
Awdhesh Pratap Singh University, Rewa, Madhya Pradesh, India in 1972.
Affiliations
Until 2005 he was the Chief Technology Officer and Co-Founder of Nayna Networks, Inc. – a next generation telecommunications systems company in San Jose, CA. Prior to that he was a professor of Computer and Information Sciences at the
Ohio State University
The Ohio State University, commonly called Ohio State or OSU, is a public land-grant research university in Columbus, Ohio. A member of the University System of Ohio, it has been ranked by major institutional rankings among the best publ ...
in
Columbus, Ohio and a Senior Consulting Engineer at
Digital Equipment Corporation
Digital Equipment Corporation (DEC ), using the trademark Digital, was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president un ...
in Littleton, Massachusetts. He was also a visiting scientist at
Massachusetts Institute of Technology
The Massachusetts Institute of Technology (MIT) is a private land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the ...
in 1983, 1985, and 1987. He has been a professor at Washington University in St. Louis,
Missouri
Missouri is a state in the Midwestern region of the United States. Ranking 21st in land area, it is bordered by eight states (tied for the most with Tennessee): Iowa to the north, Illinois, Kentucky and Tennessee to the east, Arkansas t ...
since 2005.
Research contributions
Dr. Jain is the co-inventor of the
DECbit scheme for
congestion avoidance in computer networks
[DEC-bit Patent](_blank)
/ref> which has been adapted for implementation in Frame Relay networks as forward explicit congestion notification (FECN), ATM Networks as Explicit Forward Congestion Indication ( EFCI), and TCP/IP
The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the set of communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the suit ...
networks as Explicit Congestion Notification
Explicit Congestion Notification (ECN) is an extension to the Internet Protocol and to the Transmission Control Protocol and is defined in RFC 3168 (2001). ECN allows end-to-end notification of network congestion without dropping packets. ECN is ...
(ECN).
He is also the co-inventor of the Additive Increase Multiplicative Decrease ( AIMD) principle used for traffic management in computer networks and Jain's fairness index Fairness measures or metrics are used in network engineering to determine whether users or applications are receiving a fair share of system resources. There are several mathematical and conceptual definitions of fairness.
TCP fairness
Congestion ...
.[Analysis of the increase and decrease algorithms for congestion avoidance in computer networks](_blank)
/ref>
/ref>
His work on timeout based congestion control
Network congestion in data networking and queueing theory is the reduced quality of service that occurs when a network node or link is carrying more data than it can handle. Typical effects include queueing delay, packet loss or the blocking of ...
influenced the design of the slow start algorithm in TCP/IP
The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the set of communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the suit ...
networks.[A timeout-based congestion control scheme for window flow-controlled networks](_blank)
/ref>
[Congestion avoidance and control](_blank)
/ref>
Publications
He is author of four books. His second book ''The Art of Computer Systems Performance Analysis'' published by Wiley Interscience
John Wiley & Sons, Inc., commonly known as Wiley (), is an American multinational publishing company founded in 1807 that focuses on academic publishing and instructional materials. The company produces books, journals, and encyclopedias, in p ...
won the 1991 ''Best Advanced How-to Book, Systems'' award from Computer Press Association
Founded in 1983, the Computer Press Association (CPA) was established to promote excellence in the field of computer journalism. The association was composed of working editors, writers, producers, and freelancers who covered issues related to comp ...
.[The Art of Computer Systems Performance Analysis: Techniques for Experimental Design, Measurement, Simulation, and Modeling](_blank)
/ref>
References
{{DEFAULTSORT:Jain, Raj
American computer scientists
American technology writers
Researchers in distributed computing
Fellow Members of the IEEE
Fellows of the Association for Computing Machinery
Harvard University alumni
Indian Institute of Science alumni
Washington University in St. Louis faculty
People from Madhya Pradesh
Indian emigrants to the United States
People from Satna
Technology evangelists
21st-century American engineers
1951 births
Living people
Writers from St. Louis
Businesspeople from St. Louis
American Jains
American inventors
American academics of Indian descent
Washington University in St. Louis mathematicians