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