Communication Control Method And Radio Base Station And Radio Terminal

A radio terminal in a radio communication system including a radio base station, the radio terminal, and a relay station that receives a radio signal transmitted from the radio base station and relays the radio signal to the radio terminal at a transmission frequency different from a reception frequency, the radio terminal comprising:

• a receiving unit that receives information, broadcasted from the radio base station, on one or more transmission frequencies of radio base stations or relay stations;
• a determination unit that determines whether two pieces of transmission-source identification information included in the radio signals received before and after switching the reception frequency match, the switching being conducted based on the information received by the receiving unit from one of the radio base station directly and the radio base station via the relay station;
• and
• a controller that omits a terminal registering procedure after frame-synchronization with the radio communication system if the determination unit determines that the two pieces of transmission-source identification information match.