Visible light communication (VLC) is gaining increasing attention and is considered as a promising technology for\r\nfuture wireless indoor communications. Because movable users expect a seamless connectivity experience when\r\nswitching among transmitters (i.e., VLC access points) in the VLC system, fast link switching operations must be\r\nsupported by the networks. This paper presents a novel hard link switching scheme for VLC networks with the use\r\nof pre-scanning and received signal strength (RSS) prediction. Our proposed scheme achieves the advantages of\r\nboth conventional hard and soft link switching schemes without changing device hardware or the IEEE 802.15.7\r\nmedium access control (MAC) protocol. To help compare our proposed scheme with conventional hard and soft\r\nlink switching schemes, the signal-to-interference-plus-noise ratio (SINR), the outage probability regarding the link\r\nswitching situation, and the queuing models for link switching schemes are taken into account. Simulation and\r\nnumerical results validate that our proposed scheme outperforms conventional hard and soft link switching schemes.
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