Europe's First 5G-Ready Railway Trial Utilizing Integrated Optical Passive WDM Access and Broadband Millimeter-Wave to Deliver Multi-Gbit/s Seamless Connectivity. - Jim Zou; Peter Legg; Romeo Santiago; Valerio Bruschi; Richard Graham; Salvatore Pontarelli; Giacomo Belocchi; Luca Petrucci; Paula Ciria; Carles Teres; Juan Agusti; Manuel Alfageme (ECOC, 2020)