  This paper presents an analysis of the asymmetric relaying system which
provides communication between hybrid outdoor sub-system and indoor visible
light communications (VLC) access points. The outdoor sub-system represents a
hybrid radio-frequency (RF)/free-space optical (FSO) system, introduced to
reduce the impact of weather conditions on transmission quality. Closed-form
outage probability analytical expression is derived. Numerical results are
presented and confirmed by Monte Carlo simulations. The effects of system and
channel parameters on the outage probability performance are investigated and
discussed. Greater optical transmitted power of the VLC subsystem reflects in
better system performance, as well as lower indoor environment height. When the
indoor room is higher, the propagation of the optical signal is longer, and
there will be greater power dissipation and performance deterioration. In
addition, the outage probability floor is noticed, which is important limiting
factor for relaying system design.
