In a communication system between mobile communication devices and an immobile communication device, a mobile device receives {HEAD ~ a FCMC signal} from {TAIL ~ the immobile device} upon entering a communication service area of the immobile device 
In a communication system between mobile communication devices and an immobile communication device , a mobile device receives { HEAD ~ a FCMC signal } from { TAIL ~ the immobile device } upon entering a communication service area of the immobile device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH