| 摘要 |
PROBLEM TO BE SOLVED: To resume communication only by one transmission disconnection, without disconnecting a communication network when an antenna system selected at the time of the transmission of a base station breaks down by permitting the base station to select an antenna, based on the presence or absence of a re-transmission request signal from a terminal station at transmission timing. SOLUTION: If the antenna breaks down, when the antenna is selected by information at the time of reception and a signal from a terminal station is transmitted in the base station, for example, the terminal station cannot receive signals from the base station. In the terminal station at that time, a timing holding/clock disconnection detection circuit 18 detects the clock disconnection, transmits it to a TMDA/TDD(time division multiplex access)/(time division duplex) control circuit 17 held when signal synchronism is normally established and transmits clock disconnection detection to a re-transmission request circuit 19. The base station receives a re-transmission request sent from the terminal station, and can continue communication, without disconnecting the communication network for selecting not the antenna having the fault but the other antenna, so as to transmit information in the reception state. |
