Optical access network, and method, system and apparatus for backuping optical line terminal

Abstract

The invention discloses an optical access network, and a method, a system and an apparatus for backuping an optical line terminal. The system comprises the optical line terminal and an optical divider, wherein the optical line terminal is used for detecting a connection state of the optical line terminal and an opposite end optical line terminal through the communication of the optical divider and the opposite end optical line terminal when the apparatus is in a backup state, and performing main backup state control and main backup data synchronization according to the connection state; and the optical divider is used for communicating an main backup optical line terminal with virtual optical network units in each optical network unit and the optical line terminal. The invention causes a virtual ONU to be responsible for communicating with the backup OLT corresponding to the OLT through integrating the virtual ONU in the OLT, thereby realizing data communication between the OLT fault detection and the main backup OLT, further realizing rapid and reliable data communication functions between the main backup OLTs, and rapidly realizing the switch between the main backup OLTs when the main OLT has the fault.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to an optical access network and a backup method, system and equipment for an optical line terminal. Background technique [0002] A general PON (Passive Optical Network, Passive Optical Network) is a point-to-multipoint optical access technology. PON network such as figure 1 As shown, it includes an OLT (Optical Line Terminal, optical line terminal), an optical splitter, an ONU (Optical Network Unit, optical network unit) and an optical fiber. As the central office equipment, the OLT is connected to the optical splitter through a backbone optical fiber, and the optical splitter is connected to each ONU through the branch optical fiber. The transmission direction from the OLT to the ONU is called the downlink direction. Through 1490nm wavelength transmission, the optical splitter realizes the light splitting function, and sends the downlink optical signal of the OLT to all ...

AI Technical Summary

Problems solved by technology

[0008] In the prior art, by integrating two virtual ONUs in the optical splitter to realize the OLT fault detection mechanism and the data communication between the active and standby OLTs, it is necessary to modify the original optical splitter so that the inside of the optical splitter The structure is complex, not easy to maintain and manage, and the cost increases

Images