What is LiFi?

Harald Haas, Liang Yin, Yunlu Wang, Cheng Chen

Research output: Contribution to journalArticlepeer-review

858 Citations (Scopus)


This paper attempts to clarify the difference between visible light communication (VLC) and light-fidelity (LiFi). In particular, it will show how LiFi takes VLC further by using light emitting diodes (LEDs) to realise fully networked wireless systems. Synergies are harnessed as luminaries become LiFi attocells resulting in enhanced wireless capacity providing the necessary connectivity to realise the Internet-of-Things, and contributing to the key performance indicators for the fifth generation of cellular systems (5G) and beyond. It covers all of the key research areas from LiFi components to hybrid LiFi/wireless fidelity (WiFi) networks to illustrate that LiFi attocells are not a theoretical concept any more, but at the point of real-world deployment.

Original languageEnglish
Pages (from-to)1533-1544
Number of pages12
JournalJournal of Lightwave Technology
Issue number6
Early online date17 Dec 2015
Publication statusPublished - 15 Mar 2016


  • base stations
  • communication networks
  • communication systems
  • handover
  • millimeter wave communication
  • mobile communication
  • modulation
  • multiaccess communication
  • wireless communication


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