Alternative heterogeneous schemes,such as VLC and infrared [11], have been investigated by researchers in order to resolve the VLC up link problem at the PHY layer. However, to make these approaches practical for networking, we still need to address challenges in realizing upper layer protocols when such an asymmetric model is adopted. Moreover, the ubiquitous nature of WiFi with its omnidi-rectional characteristic can be readily exploited as an up link, especially if the use of VLC reduces congestion on the RF down link.