The method 3, wherein {HEAD ~ the step} of {TAIL ~ transmitting} is performed when information regarding availability of the specific radio communication service is not currently retained by the radio communication unit 
The method 3 , wherein { HEAD ~ the step } of { TAIL ~ transmitting } is performed when information regarding availability of the specific radio communication service is not currently retained by the radio communication unit
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL 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