Physical-layer security in multiuser visible light communication networks

Liang Yin, Harald Haas

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)
20 Downloads (Pure)


In this paper, we study the physical-layer security in a 3-D multiuser visible light communication (VLC) network. The locations of access points (APs) and mobile users are modeled as two 2-D, independent and homogeneous Poisson point processes at distinct heights. Using mathematical tools from stochastic geometry, we provide a new analytical framework to characterize the secrecy performance in multiuser VLC networks. Closed-form results for the outage probability and the ergodic secrecy rate are derived for networks without AP cooperation. Considering the cooperation among APs, we give tight lower and upper bounds on the secrecy outage probability and the ergodic secrecy rate. To further enhance the secrecy performance at the legitimate user, a disk-shaped secrecy protected zone is implemented in the vicinity of the transmit AP. Based on the obtained results, it is shown that cooperating neighboring APs in a multiuser VLC network can bring performance gains on the secrecy rate, but only to a limited extent. We also show that building an eavesdropper-free protected zone around the AP significantly improves the secrecy performance of legitimate users, which appears to be a promising solution for the design of multiuser VLC networks with high security requirements.

Original languageEnglish
Pages (from-to)162-174
Number of pages13
JournalIEEE Journal on Selected Areas in Communications
Issue number1
Early online date27 Nov 2017
Publication statusPublished - 31 Jan 2018


  • physical-layer security
  • poisson point process
  • secrecy capacity
  • stochastic geometry
  • visible light communication


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