Patent ID: 6262973
Filing Date: 2001-07-17
Classification: H04J,H04W

Abstract:
An SDH wireless transmission apparatus in which each channel of working channels and at least one protection channel are provided with a unit obtained by unifying a baseband processor having a function for terminating an SDH interface and a wireless transceiver having a modulating/demodulating function and a transceiving function, a unit changeover switch for switching between a working unit and the protection unit is provided on a wired side externally of the working units, and there is provided a radio protection switching means for acquiring failure detection information from each working unit and switching between working units and the protection unit by driving the unit changeover switch in accordance with predetermined logic, wherein each of said working units comprises:a wireless-channel failure detector for detecting a failure that has occurred in a working wireless channel;a synchronization detecting circuit for detecting synchronization between a working wireless channel and a protection wireless channel;a receiving switch for selecting a signal from either the protection wireless channel or a working wireless channel; anda unit failure detector for detecting a failure that requires switching of the unit;wherein when a failure develops in a wireless channel and a working wireless channel and the protection wireless channel are synchronized, said radio protection switching means controls said receiving switch and selects a signal from the protection wireless channel and inputs this signal to the baseband processor without instantaneous disconnection; and when failure that requires switching of a unit occurs, said radio protection switching means controls said unit changeover switch to switch between a working unit and the protection unit.