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Data transmission method and system in a passive optical network system

A data transmission method and passive optical network technology, applied in the field of communication, can solve problems such as failure of normal communication, and achieve the effects of shortening the time for restoring communication and improving communication efficiency

Active Publication Date: 2016-08-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a data transmission method and system in a passive optical network system, which can solve the problem that in a hybrid passive optical network system, the physical channel of the ONU drifts, or the OLT orders the ONU to adjust the physical channel and the ONU When the physical channel of the OLT command is not adjusted, the communication between the OLT and the ONU cannot be normal

Method used

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  • Data transmission method and system in a passive optical network system
  • Data transmission method and system in a passive optical network system
  • Data transmission method and system in a passive optical network system

Examples

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example 1

[0072] Example 1 (copy the broadcast information to all physical channels, and then define specific broadcast and multicast GEMPort-ID)

[0073] The topological structure of WDM / Time Division Hybrid PON system and Orthogonal Frequency Division / Time Division Hybrid PON system is as follows: figure 2 with image 3 Shown.

[0074] A specific GEMPort-ID value, for example, GEMPort-ID with a value of 0xFFFF is used to transmit broadcast data. This value is the system default value (in other embodiments, you can also select the GEMPort-ID that the OLT will use to transmit broadcast data Value sent to ONU);

[0075] Corresponding to step 112 in the foregoing embodiment, the OLT and ONU use the following steps to complete the broadcast data transmission:

[0076] Step 1: In the WDM / Time Division Hybrid PON system, the OLT encapsulates the broadcast data in a GEM frame with GEMPort-ID value of 0xFFFF, and copies the broadcast data to all downstream wavelengths, and the OLT sends the above bro...

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Abstract

The invention provides a data transmission method and system in a passive optical network system. The data transmission method comprises the steps: an optical link terminal (OLT) on local side utilizes a downlink physical channel to send downlink data to an optical network unit (ONU) on the user side; if the ONU cannot receive the downlink data sent by the OLT, the OLT sends a command to the ONU on the relevant physical channel to enable the ONU to adjust a physical channel for receiving data to be a channel value commanded by the OLT; the OLT and the ONU performs data transmission according to the adjusted channel value. The data transmission method and system in the passive optical network system shortens the communication recovery time of the OLT and the ONU and improves the communication efficiency.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and system in a passive optical network system. Background technique [0002] With the development of network technology, it is possible to use the network to transmit a large number of services such as voice, data, and video. Therefore, the requirements for bandwidth continue to increase. Passive optical networks (PON) are produced under this demand. [0003] The topology of the PON system is as figure 1 As shown, the PON system usually consists of an optical line terminal (OLT) on the office side, an optical network unit (ONU) on the user side, and an optical distribution network (ODN), and usually adopts a point-to-multipoint network structure. ODN is composed of single-mode fiber, optical splitter, optical connector and other passive optical components, which provide optical transmission medium for the physical connection between OLT and ONU...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04L1/00
Inventor 张伟良郭勇耿丹朱松林印永嘉马壮李长垒黄新刚
Owner ZTE CORP