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Method for realizing distributed protection and passive optical network (PON) system

A distributed, protection algorithm technology, applied in the field of communications, can solve the problems of short service interruption time, increased protection switching service recovery time, PON protection function failure, etc., to shorten the recovery time, eliminate protection switching time bottlenecks, and improve service protection. effect of ability

Active Publication Date: 2015-04-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are defects in this method. First, in the centralized protection mode, the protection functions are all implemented on the main control switch board, and OLT equipment usually has only one working main control switch board. If there is only one main control switch board An abnormality of the board will lead to complete failure of the PON protection function; secondly, the service interruption time (protection switching service recovery time) required by the current operator due to PON protection switching is very short, and the traditional centralized protection mode line card needs to be When an inter-board message is sent, the alarm is reported to the main control switch board, so there is a scheduling delay for the main control switch board to report the alarm message on the line card. With the increasing capacity of optical line terminal equipment, the number of line cards in the equipment is increasing. , the inter-board messages received by the main control switch board from different line cards will also increase, so when the communication between the OLT working interface and the ONU interface is interrupted, and the moment protection switching occurs, the main control switch board will communicate with the line card The increase in the scheduling time of the reported alarm message will lead to an increase in the recovery time of the protection switching service, so the centralized protection method will have an inevitable time bottleneck, which does not meet the operator's requirements for the recovery time of the PON protection switching service

Method used

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  • Method for realizing distributed protection and passive optical network (PON) system
  • Method for realizing distributed protection and passive optical network (PON) system
  • Method for realizing distributed protection and passive optical network (PON) system

Examples

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specific Embodiment 1

[0061] In Type B protection mode, the network connection between OLT equipment and ONU equipment is as follows: Figure 4 As shown, the OLT device includes a main control switch board and multiple line cards, where the OLT interface 1 and OLT interface 2 of the line card 1 communicate with the ONU through the N:2 optical splitter 1 11 to ONU 1N Connected, OLT interface 4 of line card 1 and OLT interface 4 of line card N connect to ONU through N:2 optical splitter 221 to ONU 2N The distributed protection of the B-type protection group is realized by the following steps:

[0062] Step 1: Create B-type protection group P1, set OLT interface 1 of line card 1 as the active interface, set OLT interface 2 of line card 1 as the standby interface (at this time, the active interface is turned on and the standby interface is turned off), and the active interface The communication service carried by the network is normal, and the standby interface is in the cold backup state. Since the ...

specific Embodiment 2

[0068] In the Type C protection scenario, the network connection between the OLT and the ONU is as follows: Figure 5 As shown, the OLT device includes a main control switch board and multiple line cards, the OLT interface 1 of the line card 1 is connected to the ONU interface 1 of the ONU device 1 through the N:1 optical splitter 1, and the OLT interface 2 of the line card 1 is connected through the The N:1 optical splitter 2 is connected to the ONU interface 2 of the ONU device 1, the OLT interface 4 of the line card 1 is connected to the ONU interface 1 of the ONU device 3 through the N:1 optical splitter 3, and the OLT interface 1 of the line card N is connected to the N :1 The optical splitter 4 is connected to the ONU interface 2 of the ONU device 3 . The distributed protection of the C-type protection group is implemented by the following steps:

[0069] Step 1: Create a C-type protection group P1, set ONU interface 1 of ONU device 1 as the active interface, and set ON...

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Abstract

A method for implementing distributed protection comprises: if a line card of an optical line terminal detects damage of a main interface or interrupt of services carried on the main interface, performing protection switching to switch communication services carried on the main interface to a standby interface. A passive optical network system for implementing distributed protection comprises an optical line terminal comprising one or more line cards, wherein the line card of optical line terminal is configured to perform protection switching when detecting damage of a main interface or interrupt of services carried on the main interface so as to switch communication services carried on the main interface to a standby interface. The present invention further provides an optical line terminal for implementing distributed protection. Using the present invention, the single point invalidation problem caused by using only the main switching board for implementing the protection switching in the centralized protection can be avoided, and the PON protection switching service recovery time is decreased.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method for realizing distributed protection in a passive optical network (Passive Optical Networks, PON for short) and a passive optical network system. Background technique [0002] The passive optical network includes an Ethernet passive optical network (Ethemet PON, EPON for short), a gigabit PON (GPON for short), a next generation optical passive network (Next Generation PON, NG-PON), and the like. The passive optical network adopts a point-to-multipoint optical fiber access technology, which consists of the optical line terminal (Optical Line Terminal, OLT for short), the optical network unit (Optical Network Unit, ONU for short) on the user side, and the connection between the OLT and the ONU. Optical Distribution Network (ODN for short) composition. The protection mechanism of the passive optical network is mainly used to enhance the reliability of the opt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/032H04B10/077
CPCH04J3/14H04Q2011/0081H04Q11/0067H04J3/1694
Inventor 陈洁云卢金树黄文杰
Owner ZTE CORP
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