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Data transmission method, device and system, ONU and OLT

A data transmission method and data block technology are applied in the direction of selection device, selection device of multiplexing system, electrical components, etc., which can solve the problems of difficult deployment, difficulty in device realization, and high cost.

Active Publication Date: 2017-03-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional PON technologies such as GPON (Gigabit PON, Gigabit Passive Optical Network), EPON (Ethernet PON, Ethernet PON), XG-PON1 (10 Gigabit PON), 10GEPON (10Gbps EPON) adopt TDM (Time Division Multiplexing, time division Multiplexing) / TDMA (Time Division Multiplexing Access) technology is TDM-PON (Time Division Multiplexing PON, time division multiplexing PON), but it is difficult to increase the rate of a single wavelength after reaching 10Gbps. There are several development directions, one is OFDM-PON (Orthogonal Frequency Division Multiplexing PON, Orthogonal Frequency Division Multiplexing PON), using wavelength modulation technology to improve single-wavelength bandwidth, but the implementation complexity is high, there are devices that are difficult to implement, and the cost is relatively high High, the second is TWDM-PON (TDM&WDM PON, Time Division Multiplexing&Wavelength Division Multiplexing PON, time division multiplexing wavelength division multiplexing hybrid PON), the OLT side increases the wavelength dimension, each ONU can only work on one wavelength, but the device complexity High and difficult to deploy

Method used

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  • Data transmission method, device and system, ONU and OLT
  • Data transmission method, device and system, ONU and OLT
  • Data transmission method, device and system, ONU and OLT

Examples

Experimental program
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Effect test

Embodiment 1

[0232] Such as Figure 6 As shown in the figure, it is a schematic diagram of the connection of multiple transmission paths using single-core optical fibers and multiple pairs of wavelengths according to the embodiment of the present invention. The OLT and the ONU are connected through a single optical fiber, that is, a single-core optical fiber. And the single-core optical fiber is connected to each ONU through an optical splitter; wherein, the single-core optical fiber supports the transmission of multiple pairs of wavelengths. Specifically, two wavelengths in the pair of wavelengths mentioned here are used for uplink data and downlink data respectively. Moreover, the optical module on the OLT side supports multiple pairs of wavelengths, and the optical module on the ONU side supports multiple pairs of wavelengths. The data transmission method, when transmitting downlink data, is specifically:

[0233] The single-core optical fiber supports the transmission of three pairs ...

Embodiment 2

[0255] Such as Figure 7 As shown, it is a schematic diagram of the connection of multiple transmission paths of multiple optical fibers in the embodiment of the present invention. The OLT and the ONU are connected through multiple optical fibers, and each single-core optical fiber in the multiple optical fibers passes through an optical splitter Connected to each ONU; each ONU can be communicatively connected to the OLT through each single-core optical fiber in the plurality of optical fibers. The data transmission method, taking the transmission of downlink data as an example, is specifically:

[0256] The OLT sends the identity request information of the ONU in the quiet window that is open on the first single-core optical fiber, the second single-core optical fiber and the third single-core optical fiber of multiple optical fibers;

[0257] The identity information of the ONU sent by the ONU on the first single-core optical fiber, the second single-core optical fiber and ...

Embodiment 3

[0268] Such as Figure 8 As shown, it is a schematic diagram of the connection of multiple transmission paths of multiple optical fibers and multiple pairs of wavelengths in the embodiment of the present invention. The OLT and the ONU are connected through multiple optical fibers, wherein the multiple optical fibers are composed of multiple single-core optical fibers. And each single-core optical fiber in the plurality of optical fibers is connected to each ONU through an optical splitter; at the same time, the plurality of single-core optical fibers support the transmission of multiple pairs of wavelengths. Each ONU can be communicatively connected to the OLT through each single-core optical fiber in the plurality of optical fibers. The data transmission method, taking the transmission of downlink data as an example, is specifically:

[0269] The OLT sends the identity request information of the ONU in the quiet window that is open on the three wavelengths of the first singl...

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PUM

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Abstract

The invention provides a data transmission method, device and system, and an ONU and an OLT. The data transmission method comprises the step that an optical network unit ONU transmits information for interaction with an optical line terminal OLT on any one or more transmission paths in a plurality of transmission paths, wherein the information at least comprises one piece of register information, ranging information, bandwidth allocation and data service information. According to the method, the data can be transmitted on the plurality of transmission paths, the plurality of transmission paths are mutually independent, in the data transmission process, the transmission paths are selectable, so the bandwidth between the OLT and the ONU is improved, and the network capacity of the passive optical network is increased.

Description

technical field [0001] The invention relates to the field of passive optical networks, in particular to a data transmission method, device, system, ONU, and OLT. Background technique [0002] With the rapid development of broadband services, users' demand for access network bandwidth has increased significantly. PON (Passive Optical Network, Passive Optical Network) is currently an important technical means for user access, such as figure 1 As shown, in the PON system, the OLT is connected to the optical splitter through the backbone optical fiber, and the optical splitter is connected to multiple ONUs through the branch optical fiber. The OLT and the ONU communicate through a wavelength pair. The OLT opens the quiet window on the downstream wavelength and Request the identity information of the ONU, the ONU reports the identity information on the upstream wavelength, after the OLT obtains the identity information of the ONU, it opens the quiet window on the downstream wavel...

Claims

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Application Information

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IPC IPC(8): H04Q11/00
CPCH04Q11/00
Inventor 张伟良耿丹
Owner ZTE CORP
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