Method and system for communication between optical and SONET layers in mixed WDM/SONET networks
First Claim
1. A system for communicating between optical and SONET layers in a mixed WDM/SONET network, where said optical layer comprises WDM equipment and a service restoration system using optical switches for optically protecting individual SONET channels and for protecting said network from loss of WDM traffic by rerouting WDM traffic through a dedicated protection ring, said dedicated protection ring comprising at least three nodes with WDM and SONET equipment, said communication system comprising:
- a plurality of optoelectronic units for monitoring WDM and SONET traffic and control of said optical switches of said service restoration system, said optoelectronic units being deployed at each node of said dedicated protection ring;
at least one optoelectronic unit of said plurality comprising at least one local control loop for each direction of said WDM traffic, said local control loop comprising;
a WDM/SONET adapter for communicating information between said WDM and SONET equipment by generating temporary SONET signals and passing these signals through said WDM and SONET equipment;
at least a pair of coupling devices for coupling said WDM/SONET adapter with said node of said dedicated protection ring; and
each said optoelectronic unit comprises an optical switching circuit for manipulating said optical switches, each said optical switching circuit being connected to said WDM/SONET adapter for receiving said temporary SONET signals.
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Abstract
In a mixed WDM/SONET network having optical and SONET layers, the communication between these layers is provided by optoelectronic units. The optical layer of the mixed network is presented by a WDM equipment and a service restoration system which utilizes optical switches and protects the mixed network from loss of the WDM traffic. The optoelectronic units monitor WDM and SONET traffic and control optical switches by utilizing a WDM/SONET adapter for communicating information between WDM and SONET equipment. The WDM/SONET adapter generates temporary SONET signals and passes these signals through the WDM and SONET equipment, and a service channel for transmitting control signals from the WDM/SONET adapter to the optical switches.
16 Citations
25 Claims
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1. A system for communicating between optical and SONET layers in a mixed WDM/SONET network, where said optical layer comprises WDM equipment and a service restoration system using optical switches for optically protecting individual SONET channels and for protecting said network from loss of WDM traffic by rerouting WDM traffic through a dedicated protection ring, said dedicated protection ring comprising at least three nodes with WDM and SONET equipment, said communication system comprising:
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a plurality of optoelectronic units for monitoring WDM and SONET traffic and control of said optical switches of said service restoration system, said optoelectronic units being deployed at each node of said dedicated protection ring; at least one optoelectronic unit of said plurality comprising at least one local control loop for each direction of said WDM traffic, said local control loop comprising; a WDM/SONET adapter for communicating information between said WDM and SONET equipment by generating temporary SONET signals and passing these signals through said WDM and SONET equipment; at least a pair of coupling devices for coupling said WDM/SONET adapter with said node of said dedicated protection ring; and each said optoelectronic unit comprises an optical switching circuit for manipulating said optical switches, each said optical switching circuit being connected to said WDM/SONET adapter for receiving said temporary SONET signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for control of optical switching equipment with rerouting and reconfiguration optical switches being deployed at each node of a dedicated protection ring in a mixed WDM/SONET network having at least one receiving WDM terminal for each direction of WDM traffic, said receiving WDM terminal connected to said rerouting optical switch, comprising:
a plurality of optoelectronic units for monitoring WDM and SONET traffic of said WDM and SONET equipment and control of said rerouting and reconfiguration optical switches, each said optoelectronic unit being deployed at each node of said dedicated protection ring, at least one of said optoelectronic units comprising; a local control loop with WDM/SONET adapter and coupling devices for communicating information between WDM and SONET equipment by generating temporary SONET signals and passing said signals through WDM and SONET equipment of said mixed WDM/SONET network; and a service channel for transmitting signals from said WDM/SONET adapter to said optical control units for manipulating said optical switches. - View Dependent Claims (10, 11, 12)
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13. A method for communication between optical and SONET layers in mixed WDM/SONET networks with a plurality of SONET rings passing through WDM link and provided with SONET automatic protection switching function, the method comprising the steps of:
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monitoring traffic in said optical and SONET layers; detecting parameters of signals propagating in said optical and SONET layers; detecting deviations of parameter values of said signals; providing a WDM/SONET adapter between said optical and said SONET layers for generating command signals for said optical and SONET layers; and translating said deviations of said parameters detected at one of said optical and SONET layers to another said layer. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification