Chai Keong Toh

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Chai Keong Toh
Chai K Toh.JPG
Dr Toh at IET Awards Ceremony in London.
Born Singapore
Residence United States
Institutions National Tsing Hua University, Taiwan
University of London, UK
Alma mater Cambridge University, UK
Manchester University, UK
Academic advisors Andy Harter - examiner
David Wheeler - mentor
Jean Bacon - mentor
Known for Computer networks, mobile computing, telematics, ITS, analytics
Notable awards IEEE Kiyo Tomiyasu Award
IEEE Fellow
AAAS Fellow
IET Fellow
Official website

Chai Keong "C.K." Toh is a Singapore-born engineer, professor, and industry tech executive. Toh has performed research on wireless ad hoc networks, mobile computing, Internet Protocols, and Multimedia for over two decades.

Early life[edit]

Born in Singapore, Toh received his university education in the United Kingdom. He subsequently moved to live and work in the United States. he studied at King’s College, Cambridge under a Cambridge Commonwealth Trust Scholarship, and received his Ph.D. in Computer Science from University of Cambridge, UK (1993–96) and his undergraduate EE degrees at the University of Manchester Institute of Science and Technology (1989–91) and Singapore Polytechnic (1983–86).

Industry, Public Sector and Universities[edit]

Toh had served as Group CTO and Assistant Chief Executive.[1] of Singapore's IDA - Infocomm Development Authority of Singapore, the country's telecom regulator, ICT policy maker, and infocomm technology implementor for the country of Singapore. IDA is equivalent to the U.S. Federal Communications Commission (FCC) coupled with National Institute of Standards and Technology and Lawrence Livermore National Laboratory. Toh is also interested in startups and ventures.

Since 2011, Toh has been a Tsing Hua Honor Chair Professor of Computer Science (Taiwan).[2] He is also an Honorary Professor at the University of Hong Kong,[3] China (2004–2009), Honorary Professor at the University of Essex,[4][5] UK (2013-2015), Honorary Professor at the University of Haute Alsace, FRANCE (2013), and Advisory Professor of Computer Science at Technical University of Valencia, SPAIN.

He was a tenured Chair Professor at the University of London (2004–2006)[6] and was the Director of Research,[7] Communication Systems, at TRW Systems Corporation (now Northrop Grumman Inc) in California (2002–04). Earlier, he had been on the faculty of University of California Irvine[8] and Georgia Institute of Technology. He had worked at Hughes Research Laboratories in Malibu, California.[9] At Hughes, he co-led the DARPA TTO DAMAN (Deployable and Adaptive Mobile Ad Hoc Networks) Program.

Inventions & Awards[edit]

Toh was an IEEE Expert Lecturer[10] of the IEEE Communications Society (2002–2003). He is listed among the top 20 authors[11] in Wireless/Mobile Networks in the world by THOMSON Essential Science Indicators (ESI) for technical papers published from 1995 to 2005. His and Publish or Perish total citation exceeds 14,000.[12]

Toh is also an inventor.[13][14] He invented Associativity-Based Routing and Wireless Mobile Ad Hoc Networks, and in real life, known as "Wi-Fi Ad-Hoc Mode". His first success of implementing Wi-Fi Ad-Hoc Mode was achieved in 1999[15] and published in mobile computing magazine at that time.

In 2009, he challenged the "always-on" Internet model, claiming that the resulting energy burden globally is not sustainable. Instead, he advocated re-designing existing Internet architecture, routers, switches, servers and data centers.[16]

He is an elected Fellow of the IEEE (FIEEE),[17] a Fellow of the American Association for the Advancement of Science (FAAAS),[18] Fellow of the British Computer Society (FBCS), Fellow of IEE (Institution of Electrical Engineers),[19] Fellow of HKIE Hong Kong Institution of Engineers, Fellow of IITP (Institute of IT Professionals - formerly known as New Zealand Computer Society),[20] Fellow of Cambridge Commonwealth Society,[21] and Life Fellow of the Cambridge Philosophical Society, UK.[22] He is a Chartered Engineer (UK) and Chartered IT Professional (CITP).

In 2005, Toh received the IEEE Institution Kiyo Tomiyasu Technical Field Award[23] with the citation - "For pioneering contributions to communication protocols in ad hoc mobile wireless networks". He has undertaken research in wireless ad hoc networks since 1993 (while at Cambridge University) and had written two sole-authored pioneering books: "Wireless ATM & Ad Hoc Networks"[24] (Kluwer, 1996) and "Ad Hoc Mobile Wireless Networks"[25] (Prentice Hall Best Seller, 2001).

In 2009, he received the John Ambrose Fleming Medal (IET Achievement Medals) in London.[26]



Noted papers/patents[edit]

Keynotes & Media[edit]


  1. ^ "EMTechAsia - Influential thinkers and innovators, 2015". Retrieved 1 January 2017. 
  2. ^ "Engineering and Technology History Wiki - Chai K. Toh". 
  3. ^ "Guest Editorial Special Section on On-the-Road Mobile Networks". 
  4. ^ "Honorary Professor, University of Essex". 
  5. ^ "Professor CK Toh awarded Honorary Professor of University of Essex". 
  6. ^ "Advanced Topics on Ad Hoc Mobile Wireless Networks". 
  7. ^ "TRW Adds Boeing to Team in Pursuit of Warfighter Information Network-Tactical Contract". 
  8. ^ "Principal Investigator, CK Toh, U C Irvine 2003". 
  9. ^ "Wireless: the revolution in personal telecommunications". 
  10. ^ "The Ring, Page 6" (PDF). 
  11. ^ "Essential Science Indicators, Wireless Mobile Networks, Top 20". 
  12. ^ "GoogleScholar - Chai K Toh". 
  13. ^ "A Routing Method for Ad Hoc Wireless Networks". 
  14. ^ "Method and system for disseminating witness information in multi-hop broadcast car networks". 
  15. ^ "Mobile Computing Interview Article on Mobile Ad Hoc Networks" (PDF) 
  16. ^ "WHITE PAPER - Towards A Greener And Energy-Efficient Internet". 
  17. ^ "IEEE - Fellows - Institution of Electronic & Electrical Engineers". IEEE. 
  18. ^ "Fellows - American Association of Advancement of Science". 
  19. ^ "Fellows - Institution of Electrical Engineers". IEE. 
  20. ^ "Fellows -Institute of IT Professionals (New Zealand Computer Society)". IITP. 
  21. ^ "Cambridge University Commonwealth Society" 
  22. ^ "Fellows - Cambridge Philosophical Society". Cambridge Philosophical Society. 
  23. ^ "IEEE Kiyo Tomiyasu Award Recipients". 
  24. ^ "Wireless ATM & Ad Hoc Networks". 
  25. ^ "Wireless ATM & Ad Hoc Networks". 
  26. ^ "IET Achievement Medals". 
Preceded by
B.K. Syngal
IET Ambrose Fleming Medal (IET Achievement Medals)
Succeeded by
Vincent Poor
Preceded by
David B. Fogel
IEEE Kiyo Tomiyasu Award
Succeeded by
Muhammad A. Alam