World's Best Scientists 2026 revealed!

D-Index & Metrics

Computer Science

D-Index
80
Citations
36024
World Ranking
1055
National Ranking
563

Electronics and Electrical Engineering

D-Index
67
Citations
27337
World Ranking
1048
National Ranking
444

Research.com Recognitions

  • 2019 - Fellow, National Academy of Inventors
  • 2014 - BBVA Foundation Frontiers of Knowledge Award
  • 2012 - IEEE Alexander Graham Bell Medal “For pioneering contributions to modeling, analysis, and design of packet-switching networks.”
  • 2007 - US President's National Medal of Science "For his fundamental contributions to the mathematical theory of modern data networks, and for the functional specification of packet switching, which is the foundation of Internet technology. His mentoring of generations of students has led to the commercialization of technologies that have transformed the world.", Presented by President George W. Bush in the East Room of the White House on September 29, 2008.
  • 2003 - Fellow of the American Academy of Arts and Sciences
  • 2002 - Fellow of the Institute for Operations Research and the Management Sciences (INFORMS)
  • 2000 - ACM Fellow For his pioneering work as inventor of packet switching, the underlying technology of the Internet. He wrote the first paper and first book on the subject, and supervised the birth of what became the Internet. Also, for achievements as an inspiring and
  • 1997 - Monie A. Ferst Award, Sigma Xi
  • 1980 - Member of the National Academy of Engineering Pioneering contributions to the field and leadership as an educator in computer communications networks.
  • 1973 - IEEE Fellow For contributions to computer-communication networks, queueing theory, time-shared computer systems, and engineering education.
  • 1970 - Fellow of John Simon Guggenheim Memorial Foundation

Overview

Leonard Kleinrock is affiliated with the University of California, Los Angeles in the United States. Their research primarily falls within the field of Computer Science, with a strong focus on subfields such as Computer Networks and Communications, Information Systems, and Artificial Intelligence. Their work also touches on Epidemiology and Atomic and Molecular Physics, and Optics.

The scientist has contributed to several main topics including Blockchain Technology Applications and Security, Cryptography and Data Security, Cloud Data Security Solutions, Age of Information Optimization, Congenital Heart Disease Studies, Atomic and Subatomic Physics Research, and Peer-to-Peer Network Technologies.

Notable recent papers include:

  • Optimal Update Times for Stale Information Metrics Including the Age of Information, 2023, IEEE Journal on Selected Areas in Information Theory
  • Optimization of Assisted Search Over Server-Mediated Peer-to-peer Networks, 2022, GLOBECOM 2022 - 2022 IEEE Global Communications Conference
  • Computer network optimization using the power metric for multiple flows: Part I, 2025, Computer Networks
  • Optimal Update Times for Out-of-Date Information, 2022, SSRN Electronic Journal
  • Computer Network Optimization Using the Power Metric for Multiple Flows: Part I, 2025, SSRN Electronic Journal

Frequent co-authors in their publications are:

  • M.-J. Tsai
  • Chris Ferguson
  • Rafail Ostrovsky
  • Vassilis Zikas
  • Zifan He

The scientist's work has been published in a range of venues, with multiple publications in the SSRN Electronic Journal and Computer Networks. Other venues include the IEEE Journal on Selected Areas in Information Theory and the GLOBECOM IEEE Global Communications Conference.

Throughout their career, they have received numerous awards and honors such as:

  • Fellow, National Academy of Inventors, 2019
  • BBVA Foundation Frontiers of Knowledge Award, 2014
  • IEEE Alexander Graham Bell Medal, 2012, "For pioneering contributions to modeling, analysis, and design of packet-switching networks."
  • US President's National Medal of Science, 2007, "For fundamental contributions to the mathematical theory of modern data networks, and for the functional specification of packet switching, which is the foundation of Internet technology. Presented by President George W. Bush in 2008."
  • Fellow of the American Academy of Arts and Sciences, 2003
  • Fellow of the Institute for Operations Research and the Management Sciences (INFORMS), 2002
  • ACM Fellow, 2000
  • Monie A. Ferst Award, Sigma Xi, 1997
  • Member of the National Academy of Engineering, 1980
  • IEEE Fellow, 1973
  • Fellow of John Simon Guggenheim Memorial Foundation, 1970

Best Publications

  • Packet Switching in Radio Channels: Part I--Carrier Sense Multiple-Access Modes and Their Throughput-Delay Characteristics

    L. Kleinrock;F. Tobagi

  • A brief history of the internet

    Barry M. Leiner;Vinton G. Cerf;David D. Clark;Robert E. Kahn

  • Packet Switching in Radio Channels: Part II--The Hidden Terminal Problem in Carrier Sense Multiple-Access and the Busy-Tone Solution

    F. Tobagi;L. Kleinrock

  • Optimal Transmission Ranges for Randomly Distributed Packet Radio Terminals

    H. Takagi;L. Kleinrock

  • Virtual cut-through: A new computer communication switching technique

    Parviz Kermani;Leonard Kleinrock

  • Communication Nets: Stochastic Message Flow and Delay

    Leonard Kleinrock

  • Optimum transmission radii for packet radio networks or why six is a magic number

    L. Kleinrock;J. Silvester

  • The flow deviation method: An approach to store-and-forward communication network design

    Luigi Fratta;Mario Gerla;Leonard Kleinrock

  • Packet Switching in a Multiaccess Broadcast Channel: Performance Evaluation

    L. Kleinrock;S. Lam

  • Hierarchical routing for large networks Performance evaluation and optimization

    Leonard Kleinrock;Farouk Kamoun

  • Flow Control: A Comparative Survey

    M. Gerla;L. Kleinrock

  • Spatial TDMA: A Collision-Free Multihop Channel Access Protocol

    R. Nelson;L. Kleinrock

  • On the Topological Design of Distributed Computer Networks

    M. Gerla;L. Kleinrock

  • The past and future history of the Internet

    Barry M. Leiner;Vinton G. Cerf;David D. Clark;Robert E. Kahn

  • Queueing Systems, Vol. II: Computer Applications.

    Richard W. Butterworth;Leonard Kleinrock

  • Time-shared Systems: a theoretical treatment

    Leonard Kleinrock

  • Nomadicity: anytime, anywhere in a disconnected world

    Leonard Kleinrock

  • Vehicular networks and the future of the mobile internet

    Mario Gerla;Leonard Kleinrock

  • Host-to-Host Congestion Control for TCP

    Alexander Afanasyev;Neil Tilley;Peter Reiher;Leonard Kleinrock

  • Queueing Systems - Vol. 1: Theory

    Leonard Kleinrock

  • Queueing Systems Volume 1: Theory.

    Richard W. Butterworth;Leonard Kleinrock

Frequent Co-Authors

Mario Gerla
Mario Gerla University of California, Los Angeles
Peter Reiher
Peter Reiher University of California, Los Angeles
Simon S. Lam
Simon S. Lam The University of Texas at Austin
Fouad A. Tobagi
Fouad A. Tobagi Stanford University
Rajive Bagrodia
Rajive Bagrodia Scalable Network Technologies (United States)
Gerald J. Popek
Gerald J. Popek University of California, Los Angeles
Richard R. Muntz
Richard R. Muntz University of California, Los Angeles
Eli Gafni
Eli Gafni University of California, Los Angeles
Edward G. Coffman
Edward G. Coffman Columbia University

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