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 (

) 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,

since 2005.

Research contributions

Dr. Jain is the co-inventor of the DECbit scheme for congestion avoidance in computer networksDEC-bit Patent
/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
/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

networks.A timeout-based congestion control scheme for window flow-controlled networks
/ref> Congestion avoidance and control
/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
/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