Method and apparatus of performing protection switching on networks
First Claim
1. A method of performing protection switching in a network at an end node connected to another end node through a working path and a protection path, the method comprising:
- copying traffic and closing a first switch that is connected to the working path and a second switch that is connected to the protection path when a signal degrade fault has occurred on either the working path or the protection path so that the traffic is transmitted through both the working path and the protection path; and
stopping the copying of the traffic in a non-revertive mode when the signal degrade fault is restored.
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Accused Products
Abstract
A protection switching unit and a method of performing protection switching of the protection switching unit are provided. The method includes steps of detecting a fault that has occurred at a working path of a network; opening a first switch that is connected to the working path and closing a second switch that is connected to the protection path of the network; and maintaining a connection state of the first switch and the working path and a connection state of the second switch and the protection path, when a fault that has occurred at the working path is restored.
14 Citations
14 Claims
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1. A method of performing protection switching in a network at an end node connected to another end node through a working path and a protection path, the method comprising:
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copying traffic and closing a first switch that is connected to the working path and a second switch that is connected to the protection path when a signal degrade fault has occurred on either the working path or the protection path so that the traffic is transmitted through both the working path and the protection path; and stopping the copying of the traffic in a non-revertive mode when the signal degrade fault is restored. - View Dependent Claims (2, 3, 4)
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5. A method of performing protection switching in a network at an end node connected to another end node through a working path and a protection path, the method comprising:
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copying traffic and closing a first switch that is connected to the working path and a second switch that is connected to the protection path when a signal degrade fault has occurred on either the working path or the protection path so that the traffic is transmitted through both the working path and the protection path; maintaining a state of the first switch and a state of the second switch in a wait to restore (WTR) state in a revertive mode; and stopping the copying of the traffic in the revertive-mode when the WTR state has elapsed. - View Dependent Claims (6, 7, 8)
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9. A protection switching unit that is included in one end node connected to another end node through a working path and a protection path, the protection switching unit comprising:
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a path search unit that is able to detect a signal degrade fault that has occurred on either of the working path and the protection path and a restoration of the signal degrade fault; a first switch that is connected to the working path; a second switch that is connected to the protection path; and a controller that; copies traffic, transfers a close command to the first switch and the second switch when the path search unit detects a signal degrade fault on either the working path or the protection path so that the traffic is transmitted through both the working path and the protection path, and stops copying the traffic in a non-revertive mode when the signal degrade fault is restored. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification