Chai Keong Toh

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Chai Keong Toh

Chai K Toh.JPG
Toh at IET Awards Ceremony in London.
Alma materCambridge University, UK
Manchester University, UK
Known forComputer networks, mobile computing, ITS, data analytics, IoT and Smart Cities
AwardsIEEE Kiyo Tomiyasu Award (2005)
IET Achievement Medals (2009)
IEEE Fellow (2009)
AAAS Fellow (2009)
IET Fellow (2004)
BCS Fellow (2003)
FREng (2019)
Scientific career
InstitutionsNational Tsing Hua University, Taiwan
University of London, UK
ThesisProtocol Aspects of Mobile Radio Networks (1996)
Academic advisorsAndy Harter – examiner
David Wheeler – mentor
Jean Bacon – mentor
WebsiteOfficial website

Chai Keong "C.K." Toh FREng is a Singapore-born computer scientist, engineer, professor, and chief technology officer. He 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 in 1996 and his undergraduate EE degrees at the University of Manchester, Institute of Science and Technology in 1991.

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 implementer. 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.

From 2002 to 2004, he was the Director of Research,[2] Communication Systems, at TRW Systems Corporation (now Northrop Grumman Inc) in Carson, California. After his PhD in 1996, he joined Hughes Research Laboratories in Malibu, California.[3] At Hughes, he co-led the DARPA TTO DAMAN (Deployable and Adaptive Mobile Ad Hoc Networks) Program. Earlier on, he worked as an engineer at Advanced Logic Research Computers, Archive Corporation, and served on the technology advisory board of Convergence Corporation (acquired by Amazon[4]).

Since 2011, he has been appointed the Tsing Hua Honor Chair Professor of Computer Science (Taiwan).[5] He has also been an Honorary Professor at the University of Hong Kong,[6] China (2004–2009), Honorary Professor at the University of Essex,[7][8] UK (2013–2015), Honorary Professor at the University of Haute Alsace, FRANCE (2013), and Advisory Professor of Computer Science[9] at Technical University of Valencia, SPAIN. Earlier on, he was a tenured Chair Professor at the University of London (2004–2006)[10] and on the faculty at University of California, Irvine[11] and at Georgia Institute of Technology.

Inventions and awards[edit]

Toh was as an IEEE Expert Lecturer[12] of the IEEE Communications Society from 2002 to 2003. He is also listed among the top 20 authors[13] 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 20,000.[14]

He is also an inventor.[15][16] He invented Associativity-Based Routing and Wireless Mobile Ad Hoc Networks, and in real life, known as "Wi-Fi Ad-Hoc Mode". His first successful implementation of Wi-Fi Ad-Hoc Mode was achieved in 1998 when he established a working wireless ad hoc network in Georgia, USA.[17][18][19] 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.[20] In 2011, he invented a method to identify witnesses during car accidents using a distributed information dissemination and data fusion approach.[21] In 2009, he introduced "signs that talk", transforming traffic signs into wireless digital forms[22]

He is an elected Fellow of the IEEE (FIEEE),[23] a Fellow of the American Association for the Advancement of Science (FAAAS),[24] Fellow of the British Computer Society (FBCS), Fellow of IEE (Institution of Electrical Engineers),[25] Fellow of HKIE Hong Kong Institution of Engineers, Fellow of IITP (Institute of IT Professionals - formerly known as New Zealand Computer Society),[26] Fellow of Cambridge Commonwealth Society,[27] and Life Fellow of the Cambridge Philosophical Society, UK.[28] He is a Chartered Engineer (UK) and Chartered IT Professional (CITP).

In 2005, IEEE awarded him the IEEE Institution Kiyo Tomiyasu Technical Field Award,[29] 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"[30] (Kluwer, 1997) and "Ad Hoc Mobile Wireless Networks"[31] (Prentice Hall Best Seller, 2001). In 2009, IET awarded him the John Ambrose Fleming Medal (IET Achievement Medals) in London.[32][33] In 2019, he was elected to The Royal Academy of Engineering, UK.[34]



  • Toh, Chai Keong (2001). Ad Hoc Mobile Wireless Networks: Protocols and Systems - Prentice Hall Best Seller 2002. Pearson Education. ISBN 9780132442046. - also published in Japan (Japanese translation) and India (paperback edition)
  • Toh, Chai Keong (1997). Wireless ATM and Ad Hoc Networks: Protocols and Architectures. Kluwer Academic Publishers. ISBN 978-0792398226.
  • Toh, Chai Keong (1996). Protocol Aspects of Mobile Radio Networks. University of Cambridge.

Noted papers/patents[edit]

Keynotes and media[edit]


  1. ^ "EMTechAsia - Influential thinkers and innovators, 2015". Retrieved 1 January 2017.
  2. ^ "TRW Adds Boeing to Team in Pursuit of Warfighter Information Network-Tactical Contract". Archived from the original on 20 December 2016. Retrieved 15 December 2016.
  3. ^ "Wireless: the revolution in personal telecommunications".
  4. ^ " Acquires Convergence Corporation".
  5. ^ "Engineering and Technology History Wiki - Chai K. Toh".
  6. ^ Toh, C. K. (2007). "Guest Editorial Special Section on On-the-Road Mobile Networks". IEEE Transactions on Intelligent Transportation Systems. 8 (3): 378. doi:10.1109/TITS.2007.907049.
  7. ^ "Honorary Professor, University of Essex". Archived from the original on 20 December 2016. Retrieved 15 December 2016.
  8. ^ "Professor CK Toh awarded Honorary Professor of University of Essex". Archived from the original on 20 December 2016. Retrieved 16 December 2016.
  9. ^ "Web site at Technical University Valencia, SPAIN".
  10. ^ "Advanced Topics on Ad Hoc Mobile Wireless Networks".
  11. ^ "Principal Investigator, CK Toh, U C Irvine 2003".
  12. ^ "The Ring, Page 6" (PDF).
  13. ^ "Essential Science Indicators, Wireless Mobile Networks, Top 20".
  14. ^ "GoogleScholar - Chai K Toh".
  15. ^ "A Routing Method for Ad Hoc Wireless Networks".
  16. ^ "Method and system for disseminating witness information in multi-hop broadcast car networks".
  17. ^ Chapter 7 - Implementation of Ad Hoc Wireless Networks, in book "Ad Hoc Mobile Wireless Networks: Protocols & Systems" by Toh
  18. ^ Implementation and Evaluation of An Adaptive Routing Protocol for Infrastructureless Mobile Networks, Proceedings of IEEE ICCCN Conference, 2000
  19. ^ Mobile Computing Magazine Interview Article on Mobile Ad Hoc Networks Implementation, 1999. (PDF)
  20. ^ "WHITE PAPER - Towards A Greener And Energy-Efficient Internet".
  21. ^ "Method and system for disseminating witness information in multi-hop broadcast car networks".
  22. ^ "Wireless Digital Traffic Signs of the Future, CK Toh, JC Cano, CJ Fernandez-Laguia, P Manzoni, C Calafate, IET Networks 8 (1)" (PDF).
  23. ^ "IEEE - Fellows - Institution of Electronic & Electrical Engineers". IEEE. Archived from the original on 23 September 2013. Retrieved 22 May 2013.
  24. ^ "Fellows - American Association of Advancement of Science". Archived from the original on 27 July 2014.
  25. ^ "Fellows - Institution of Electrical Engineers". IEE.
  26. ^ "Fellows -Institute of IT Professionals (New Zealand Computer Society)". IITP. Archived from the original on 29 April 2013. Retrieved 24 May 2013.
  27. ^ Cambridge University Commonwealth Society, archived from the original on 30 November 2016, retrieved 29 November 2016
  28. ^ "Fellows - Cambridge Philosophical Society". Cambridge Philosophical Society.
  29. ^ "IEEE Kiyo Tomiyasu Award Recipients".
  30. ^ Toh, C. K. (1997). Book - Wireless ATM & Ad Hoc Networks, 1997, Klueer Academic Publishers. ISBN 9780792398226.
  31. ^ Toh, Chai K. (3 December 2001). Book - Ad Hoc Mobile Wireless Networks: Protocols and Systems, 2001, Prentice Hall Publishers. ISBN 9780132442046.
  32. ^ "IET Achievement Medals".
  33. ^ "Members' Recognitions".
  34. ^ "Academy welcomes leading UK and international engineers as new Fellows, 2019".
Preceded by
B.K. Syngal
IET Ambrose Fleming Medal (IET Achievement Medals)
Succeeded by
Vincent Poor, FRS
Preceded by
David B. Fogel
IEEE Kiyo Tomiyasu Award
Succeeded by
Muhammad A. Alam