Throughput analysis of TCP over visible light communication indoor networks

This paper presents an analytical framework to study the performance of TCP over the Visible Light Communications (VLC) indoor networks when the automatic-repeat request, selective repeat (ARQ-SR) scheme is employed by the link layer. We use a three-dimensional (3-D) Markov model to analytically derive the TCP throughput considering the impacts of link layer and power distribution in the indoor environment. In the numerical results, we discuss cross-layer optimization strategies for the selection of transmitted power in the physical layer and the re-transmission persistent level in the link layer.