The basic configuration of DSRC systems with the
ROF scheme is shown in Fig. 1. Modems, RF
amplifiers, electro-optical converter (E/O, OE), and delivery switch (DS) are equipped in the central station
(CS) [7]. Radio signals are converted to optical signals
in E/O modulators and transmitted over optical fibers
between the central station (CS) and the roadside base
stations (BS).
The delivery switch (DS) has the capability to assign
any carrier to any zone according to traffic demands.
As a result, more carriers will be assigned to the zone
in which more traffic is bom.