| 摘要 |
A radio terminal device informs a radio base station of entrance into a communication suppress mode such as a power saving mode by transmitting a state transition informing packet to the radio base station, when detecting deterioration of a communication. The packet received by the radio base station in this state is retained by the radio base station. When receiving an acknowledgment signal from the radio base station, the radio terminal device changes the setting of a receiver to a radio channel different from a radio channel used in the communication with the radio base station, and searches for other radio base stations. |
