Optical cross-connect apparatus, and its signal monitoring method
AssigneeNEC Corporation
InventorKoji Asahi
Life of this patent
Estimating the term…
Abstract
To provide an optical cross-connect apparatus capable of, even in the case where a light switch becomes large-sized, supervising quality and management information of light signals passing through inside the apparatus with low-cost configuration. For each of the light signals inputted from n pieces of input port, path setting in a branch connection state is performed in order following a control signal from a control section by connecting any one of n pieces of output port with a predetermined supervising port at n×m light SW. Quality and management information are detected from light signals outputted from a supervising output port at a light signal detecting section, and the quality and the management information are supervised at a light signal supervising section.
Claims16
An optical cross-connect apparatus, comprising:
- a light switch having a plurality of first and second ports, which switches paths of light signals input at each of said first ports and outputs the light signals from any one of said second ports;
- a light path control section for branching a path of said light switch so as to have the light signal input at any one of said first ports output from any two of said second ports when supervising the light signal and have the light signals input at each of said first ports output from a predetermined one of said second ports when not supervising the light signals;
- and
- a light signal supervising section for supervising a quality of the light signals output from either of said two second ports only when supervising the light signals.
A signal supervising method, comprising the steps of:
- switching paths of light signals input at each of a plurality of first ports and having them outputted from any one of a plurality of second ports;
- controlling said light switching step so as to have the light signal input at any one of said first ports output from any two of said second ports when supervising the light signal and to have the light signals input at each of said first ports output from a predetermined one of said second ports when not supervising the light signals;
- and
- supervising a quality of the light signals output from either of said two second ports only when performing said supervising.
An optical cross-connect apparatus, comprising:
- a signal light switch having n input ports, n being at least two, and n+1 output ports, said light switch directing light signals received at one of said input ports to at least one of said output ports;
- only one of said n+1 output ports having a light signal detector connected thereto, said detector detecting at least one of light signal quality and management information;
- and
- a switch controller that controls said switch so that a light signal received at a selected one of said input ports is directed to two of said output ports, including said one output port having said detector connected thereto.
A method of cross-connecting input light signals, comprising the step of:
- directing light signals received at n input ports, n being at least two, to at least one of n+1 output ports;
- detecting at least one of light signal quality and management information only at one of said n+1 output ports;
- and
- controlling the light signals so that a light signal received at a selected one of the input ports is directed to two of the output ports, including the one output port at which the detecting occurs.
An optical cross-connect apparatus, comprising:
- a signal light switch having n first ports, n being at least two, and n second ports, said light switch directing light signals received at one of said first ports to at least one of said second ports and directing light signals received at one of said second ports to at least one of said first ports;
- only one of said first ports having a light signal detector connected thereto and only one of said second ports having a light signal detector connected thereto, said detector detecting at least one of light signal quality and management information;
- and
- a switch controller that controls said switch so that a light signal received at a selected one of said first ports is directed to two of said second ports, including said one second port having said detector connected thereto, and so that a light signal received at a selected one of said second ports is directed to two of said first ports, including said one first port having said detector connected thereto.
Dependencies are inferred from the claim text.