Optical cross connect apparatus and optical transmission system
View Patent ↗Disclosed is an optical cross connect apparatus that is applicable to an end office node and relay node in a path. The optical cross connect apparatus includes an optical switch for generating plural optical output signals from plural optical input signals; an optical level monitor section for detecting the optical levels of the optical input signals; and a control section that is connected to the optical switch and the optical level monitor section, includes a path switching management section for retaining a path switching management table, references the path switching management table when the optical input signals detected by the optical level monitor section are found to be OFF, and judges whether the optical switch should be operated.
1. An optical cross connect apparatus for allocating optical signals from first to third reception ports to first and second transmission ports;
wherein, when an optical signal fed from the first reception port is found to be OFF, connection between the first reception port and the first transmission port is maintained; and
when an optical signal fed from the second reception port is found to be OFF, connection source for the second transmission port which is connected to the second reception port, is changed from the second reception port to the third reception port;
further comprising:
an optical switch for associating optical signals fed from the first to third reception ports with the first and second transmissions ports;
an optical level monitor section for monitoring optical levels of said optical signals fed from the first to third reception ports; and
a control section for controlling said optical switch in accordance with results of monitoring by said optical level monitor section;
wherein said control section includes a path switching management section for recording a path switching management table, references said path switching management table when said optical level monitor section detects that one of optical input signals fed from the first to third reception ports is OFF, and judges whether said optical switch should be operated.
2. The optical cross connect apparatus according to claim 1 , wherein a reception port that maintains connection to a transmission port when an optical signal OFF state is detected and a reception port that changes the connection to a transmission port when an optical signal OFF state is detected can be arbitrarily defined.
3. An optical cross connect apparatus for allocating optical signals from first to third reception ports to first and second transmission ports;
wherein, when an optical signal fed from the first reception port is found to be OFF, connection between the first reception port and the first transmission port is maintained; and
when an optical signal fed from the second reception port is found to be OFF, connection source for the second transmission port, which is connected to the second reception port, is changed from the second reception port to the third reception port;
wherein a reception port that maintains connection to a transmission port when an optical signal OFF state is detected and a reception port that changes the connection to a transmission port when an optical signal OFF state is detected can be arbitrarily defined:
further comprising:
an optical switch for associating optical signals fed from the first to third reception pods with the first and second transmissions ports;
an optical level monitor section for monitoring optical levels of said optical signals fed from the first to third reception ports; and
a control section for controlling said optical switch in accordance with results of monitoring by said optical level monitor section,
wherein said control section includes a path switching management section for recording a path switching management table, references said path switching management table when said optical level monitor section detects that one of optical input signals fed from the first to third reception ports is OFF, and judges whether said optical switch should be operated.