A system and method for reducing reflections in a transmission line and for recovering energy from the load in the transmission during the process. Using the present invention, it can implement the corresponding different a process for the different Prefix while the data communication device is forwarding service. The rails can be built on the ground, on poles, or in tunnels. Blocks of downlink data are received by the base station which requests downlink channel quality measurements only from those mobile terminals with pending downlink transmissions.