Fujitsu Corporation

Yuji Shiraishi

Kimio Watanabe

Ichiro Ayukawa

Kazutoshi Kawamura

Hisamichi Hazama

Shingo Mizuno

Tadayuki Sakama

Yoshiko Koizumi

Kimihiko Yoshimura

When a wireless channel fails, a working signal and a protection signal are synchronized and switching is performed without instantaneous disconnection. Each working unit of a plurality of working units is provided with 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 changeover switch for selecting a signal from either the protection wireless channel or a working wireless channel without instantaneous disconnection; and a unit failure detector for detecting a failure that requires switching of a unit. When a failure develops in a wireless channel and a working wireless channel and the protection wireless channel are synchronized, a radio protection switching device controls the changeover switch to switch between working and protection wireless channels without instantaneous disconnection. Further, when failure that requires switching of a unit occurs, the radio protection switching device controls a unit changeover switch to switch between a working unit and the protection unit.

SDH wireless transmission apparatus

A communication monitoring and controlling apparatus for easily collecting monitoring information is connected to an existing network composed of a plurality of communication equipment. A management information collecting unit collects management information of each of the communication equipment. The management information is in an existing network management information format. A format converting unit converts the management information in the existing network management information format into management information in a new-type network management information format. The new-type network management information format is a format used by the new-type network, and handles the existing network composed of the communication equipments as one network element. The converted management information is transmitted to at least one operation system of the new-type network by a transmitting unit.

Communication monitoring and controlling apparatus

Growing community of inventors

Kawasaki, Japan

Yuji Shiraishi