Patent ID: 8380061
Filing Date: 2013-02-19
Classification: H04B,H04J

Abstract:
1. A Long Reach Passive Optical Network (LR-PON) protection method, comprising: obtaining, by an Electrical Relay (E-R) device, optical signals transmitted through two fiber transmission paths on one side of the E-R device, and performing optical-to-electrical (O/E) conversion for the optical signals transmitted through the two paths; detecting whether loss of signal (LOS) occurs in the converted electrical signals; if the LOS occurs in the electrical signal on one path, selecting the electrical signal on the path that does not involve the LOS; if detecting that the LOS occurs in the electrical signal on neither path, detecting whether loss of frame (LOF) occurs in the electrical signals on the two paths, and selecting the electrical signal on the path that does not involve the LOF if the LOF occurs in the electrical signal on one path; and performing, by the E-R device, signal regeneration for the selected electrical signal, performing, by the E-R device, electrical-to-optical (E/O) conversion for the regenerated electrical signal, and sending, by the E-R device, the converted optical signal through two fiber transmission paths on the other side of the E-R device.