  Visible light communication (VLC) uses huge license-free spectral bandwidth
of visible light for high-speed wireless communication. Since each VLC access
point covers a small area, handovers of mobile users are inevitable. In order
to deal with these handovers, developing fast and effective resource allocation
algorithms is a challenge. This paper introduces the problem of mobility-aware
optimization of resources in VLC networks using the T-step look-ahead policy
and employing the notion of handover efficiency. It is shown that the handover
efficiency can correlate the overall performance of the network with future
actions based on the mobility of users. Due to the stationary nature of indoor
optical wireless channels, future channel state information (CSI) can be
predicted by anticipating the future locations of users. A resource allocation
algorithm is thus proposed, which uses CSI to dynamically allocate network
resources to users. To solve this mathematically intractable problem, a novel
relaxation method is proposed, which proves to be a useful tool to develop
efficient algorithms for network optimization problems with a proportional
fairness utility function. The resulting algorithm is extremely faster than the
previous method and awareness of mobility enhances the overall performance of
the network in terms of rate and fairness utility function.
