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Message transmission method, device and system in passive optical network

A passive optical network and message transmission technology, applied in the field of optical communication, can solve the problem of small service interruption delay

Inactive Publication Date: 2013-02-13
深圳市前海滕翔科技信息有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of realizing the present invention, the inventor found that there is no method in the prior art to realize uninterrupted services or a small service interruption delay during the OLT master-standby switchover process

Method used

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  • Message transmission method, device and system in passive optical network
  • Message transmission method, device and system in passive optical network
  • Message transmission method, device and system in passive optical network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A schematic structural diagram of an ONU provided in this embodiment is as follows figure 2 As shown in , the ONU supports the DHCP / PPPoE relay function, and the relay function can be Relay or Proxy. The ONU specifically includes:

[0057] The port information adding module 21 is used to add ONU port information in the upstream message, that is, add Option1 or Option3 without OLT port information. At this time, the OLT needs to support the DHCP / PPPoE upstream relay function; or add in the upstream message ONU port and OLT port information, that is, adding Option1 and Option2 or adding complete Option3, the OLT port information on the ONU can be configured in advance through OMCI / L2CP; at this time, the OLT does not need the DHCP / PPPoE uplink relay function. Then, transmit the uplink message to the uplink message sending module 22, where the uplink message includes a DHCP or PPPoE or L2CP message.

[0058] The uplink message sending module 22 is configured to send the...

Embodiment 2

[0084] In this embodiment, ONU port information and OLT port information are added by ONU and OLT respectively. The processing flow of the uplink relay method of a PON system provided by this embodiment is as follows: Figure 6 As shown, the following processing steps are included:

[0085] 61. The user terminal / RG (Residential Gateway, resident gateway) initiates a DHCP / PPPoE message, and sends the DHCP / PPPoE message to the ONU;

[0086] 62. The ONU adds ONU port information to the above DHCP / PPPoE message, that is, adds the ONU port information part of Option1 or Option3; or the ONU initiates an L2CP message, which carries ONU port information, that is, the ONU port information part that carries Option1 or Option3;

[0087] 63. The ONU transmits the above-mentioned L2CP / DHCP / PPPoE message carrying port information to the active OLT1 and the standby OLT2 through the PON optical fiber;

[0088] 64. The backup OLT2 caches the L2CP / DHCP / PPPoE packets;

[0089] 65. A fiber fai...

Embodiment 3

[0101] In this embodiment, the ONU port information and the OLT port information are added by the ONU. The processing flow of the uplink relay method of a PON system provided by this embodiment is as follows: Figure 7 As shown, the following processing steps are included:

[0102] 70. Configure the main OLT1 port information for each ONU through L2CP or network management protocol;

[0103] 71. The user terminal / RG initiates a DHCP / PPPoE message, and sends the DHCP / PPPoE message to the ONU;

[0104] 72. ONU adds ONU port information and active OLT1 port information to DHCP / PPPoE messages, that is, adds Option1 and Option2 or adds complete Option3; or ONU initiates an L2CP message, which carries ONU port information and active OLT1 port information , that is, carry Option1 and Option2 or carry the complete Option3;

[0105] 73. The ONU transmits the above-mentioned L2CP / DHCP / PPPoE message carrying port information to the active OLT1 and the standby OLT2 through the PON opti...

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Abstract

The present invention provides a method, an apparatus and a system for message transmission in passive optical network (PON). The method mainly includes that a backup optical line termination (OLT) receives an uplink message sent from an optical network unit (ONU); and when a main / backup switch occurs, it sends the uplink message carrying port information, which includes ONU port information and backup OLT port information, to a broadband network gateway (BNG), in order that the BNG transfers the uplink message according to the port information. Application of the present invention can enable uplink and downlink layer 2 control protocol (L2CP) / dynamic host configuration protocol (DHCP) / point-to-point over ethernet (PPPoE) messages to carry correct OLT port information during a PON system main / backup switch process, will not lead to L2CP / DHCP / PPPoE uplink and downlink service interruption, or will make the interruption delay minimum.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a message transmission method, device and system in a PON (Passive Optical Network, Passive Optical Network). Background technique [0002] PON is a point-to-multipoint optical access technology. PON is mainly composed of OLT (Optical Line Termination, optical path termination point), optical splitter, ONU (Optical Network Unit, optical network unit) / ONT (Optical Network Terminal, optical network terminal) and optical fiber connecting this device. [0003] As a central office device, the OLT is connected to an optical splitter or extender through a trunk fiber, and the optical splitter or extender is connected to each ONU through a separate branch fiber. The trunk fiber is used between the optical splitter / extender and the OLT, and the branch optical fiber is used between the optical splitter / extender and the ONU. In the downstream direction, the optical s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04L29/08H04L12/24H04B1/74
CPCH04Q2011/0081H04Q11/0067H04L45/62H04L45/28H04L45/00H04L45/22
Inventor 郑若滨
Owner 深圳市前海滕翔科技信息有限公司
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