a wireless communication method and system utilizing optical transmission technology to transport analog signals directly to / from the antenna , without adc / dac , so that the optical transport facility can be utilized more efficiently and there is no need to adapt the digital data rate to the transport capacity , as the analog transmission is independent of the digits buried in the given spectrum . complicated operation is moved into a centralized location , so that a cell site is light and flexible . in contrast , the standardized approach in the industry , which involves digitized interface between the antenna and the control processor , hits capacity limits of the current transport technology .