[IEEE 2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) - Istanbul, Turkey (2019.9.8-2019.9.11)] 2019 IEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) - A Study of Sojourn Time for Indoor LiFi Cellular NetworksSoltani, Mohammad Dehghani; Zeng, Zhihong; Kazemi, Hossein; Chen, Cheng; Haas, Harald; Safari, Majid · 2019