Visible light communication (VLC) is a novel medium-short range opti cal wireless communication with the advantages of immunity to electromagnetic radiation,low power consumpti on and high transmission rate. In order to loom the radio frequency crisis,the pioneer VLC technology is chose n to provide a new solution for medium-short wireless communication.Optical cellular network based on VLC is c onsidered carefully as a potential candidate for 5G mobile applications under indoor conditions.In this paper,a generalized ray-tracing algorithm is selected to analyze the indoor channel characteristics for optical cellular network.The influence of impulse response,path loss and channel delay is analyzed under conditions of di fferent LED semi-power angles. On the whole,the path loss and channel delay increase as the LED semi-power an gle increases.The total path loss and channel delay vary from 32dB to 36.5dB and 0.4ns to 1.5ns,respectivel y.