Method for controlling bidirectional line protection switching by using a remote defect indication signal
AssigneesElectronics and Telecommunications Research Institute, Korea Telecom
InventorsKyung-Gyu Chun, Yoo-Kyoung Lee
Life of this patent
Estimating the term…
Abstract
A method for controlling bidirectional line protection switching by using a remote defect indication signal. The method includes the following steps of: inserting and transmitting a remote defect indication signal through the opposite directional link, in case the receiving end of working line detects a defect while a traffic is transmitted via a bidirectional link, and then switching to a back-up line by controlling the selector of the receiving station; and switching to the protection line by controlling the selector of the transmitting station, in case the remote defect indication signal is detected via the opposite directional link.
Claims1
A method for controlling bidirectional line protection switching by using a remote defect indication signal, applied to a transmission system having two stations in which the traffic transmitting end of both a working line and a protection line are bridged over each other, comprising the steps of:
- inserting and transmitting a remote defect indication signal through an opposite directional link, in case a receiving end of the working line detects a defect while a traffic is transmitted via a bidirectional link, and then switching to a first protection line by means of controlling a first selector of a first station;
- and
- simultaneously switching to a second protection line by means of controlling a second selector of a second station, in case the remote defect indication signal is detected via the opposite directional link, while a traffic is transmitted via a bidirectional link.
Dependencies are inferred from the claim text.