Method and device for realizing all-fiber protection

Abstract

The invention discloses a method and a device for realizing all-fiber protection, and relates to the technical field of optical fiber access. The method comprises the following steps that: an optical link terminal OLT sends a request frame containing a request channel number and a request level to an optical network unit ONU through a primary physical channel or a spare physical channel; the ONU judges whether the physical channel activated currently is identical with a physical channel to be rearranged corresponding to the request channel number according to the request channel number analyzed by the request frame; if a judging result is that the physical channel activated currently is identical with the physical channel to be rearranged corresponding to the request channel number, the ONU maintains the physical channel activated currently; and if the judging result is that the physical channel activated currently is different from the physical channel to be rearranged corresponding to the request channel number, the ONU executes the operation of reversing the primary physical channel and the spare physical channel according to the request channel number, the request level and an alarm level, which are analyzed by the request frame. The method and the device improve the practicability, configurability and manageability of a system greatly, so that the integral system is more flexible and meets various application requirements.

Description

technical field [0001] The invention relates to the technical field of optical fiber access, in particular to a method and device for all optical fiber protection of an Ethernet passive optical network EPON system. Background technique [0002] Ethernet Passive Optical Network (EPON) is a new type of optical fiber access network technology. It adopts a point-to-multipoint structure and passive optical fiber transmission to provide various services on the Ethernet. It adopts passive optical network (Passive Optical Network, PON) technology in the physical layer, uses the Ethernet protocol in the link layer, and realizes the access of the Ethernet by using the topological structure of the PON. Therefore, it integrates PON technology and Ethernet technology, and has the advantages of low cost, large bandwidth, strong scalability, flexible and fast service reorganization, and compatibility with existing Ethernet and convenient management. [0003] In recent years, the user scal...

AI Technical Summary

Problems solved by technology

[0005] 1. There is no specific definition and difference between the request level of command switching and the alarm level generated by optical link failure, which is not conducive to the monitoring of network conditions, nor to the configuration of the entire protection system according to specific needs

[0006] 2. In networking, in order to make channel switching correct, it is necessary to manually ensure that the active PON port on the Optical Line Terminal (OLT) corresponds to the active PON port on the Optical Network Unit (ONU). The standby PON port of the ONU corresponds to the standby PON port of the ONU, which is difficult to achieve in practical applications

[0007] 3. There is a lack of heartbeat packets between the OLT and the ONU that can keep the link consistent. In the application, the link channel is likely to be inconsistent, resulting in the problem of link failure.

Images