Access Point Selection for Hybrid Li-Fi and Wi-Fi Networks

Xiping Wu, Majid Safari, Harald Haas

Research output: Contribution to journalArticlepeer-review


Hybrid light fidelity (Li-Fi) and wireless fidelity (Wi- Fi) networks are an emerging technology for future indoor wireless communications. This hybrid network combines the highspeed data transmission offered by visible light communication (VLC) and the ubiquitous coverage of radio-frequency (RF) techniques. While a hybrid network can improve the system throughput and users’ experience, it also challenges the process of access point selection (APS) due to the mixture of heterogeneous access points (APs). In this paper, the differences between homogeneous and heterogeneous networks regarding APS are discussed, and a two-stage APS method is proposed for hybrid Li-Fi/Wi-Fi networks. In the first stage, a fuzzy logic system is developed to determine the users that should be connected to Wi-Fi. In the second stage, the remaining users are assigned in the environment of a homogeneous Li-Fi network. Compared with the optimisation method, the proposed method achieves a close-to-optimal throughput at significantly reduced complexity. Simulation results also show that our method greatly improves the system throughput over the conventional methods such as the signal strength strategy (SSS) and load balancing (LB), at slightly increased complexity.

Original languageEnglish
JournalIEEE Transactions on Communications
Early online date21 Aug 2017
Publication statusE-pub ahead of print - 21 Aug 2017


  • access point selection
  • Fuzzy logic
  • Hybrid network
  • light fidelity (Li-Fi)
  • Optical receivers
  • Optical refraction
  • Optical variables control
  • Radio frequency
  • Wireless fidelity
  • wireless fidelity (Wi-Fi)


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