Patent ID: 7796502
Filing Date: 2010-09-14
Classification: H04J,H04Q

Abstract:
1. A connection switching device for implementing Optical Channel Shared Protection Ring (Och-SPRing), used in a node of an optical network system with a working path and a backup path, comprising: a first switch and a second switch, each of the first switch and the second switch has two unidirectional input ports and one unidirectional output port, and one of the input ports of the first switch is connected to the output port of the first switch under the control of the first switch, one of the input ports of the second switch is connected to the output port of the second switch Under control of the second switch; wherein one input port of the first switch connects to and receives downlink service signals from a downlink direction of the working path, the other input port of the first switch connects to and receives the downlink service signals from a downlink direction of the backup path, and the output port of the first switch connects and outputs the downlink service signals to a local drop path; one input port of the second switch connects to and receives uplink service signals from a local add path, the other input port of the second switch connects to and receives the downlink service signals from the downlink direction of the backup path and the output port of the second switch connects to an uplink direction of the backup path; and the local add path is connected with an uplink direction of the working path at the same time wherein under normal modes of the connection switching device, the input port, which connects to the downlink direction of the working path, of the first switch, is connected to the output port of the first switch; under local drop modes, the input port, which connects to the downlink direction of the backup path, of the first switch, is connected to the output port of the first switch; under local add modes, the input port, which connects to the local add path, of the second switch, is connected to the output port of the second switch; and under express modes, the input port, which connects to the downlink direction of the backup path, of the second switch, is connected to the output port of the second switch.