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A data transmission method, device and system

A data and order technology, applied in the field of passive optical network systems, can solve problems that are not conducive to ONU production and deployment, and cause ONU coloration, etc., to reduce light source management costs, reduce costs, and facilitate production and deployment.

Active Publication Date: 2018-05-01
ZTE CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of wavelength multiplexing OFDMA-PON architecture, which uses different wavelengths to send data in the same time slot, will cause the color of the ONU, which is not conducive to the production and deployment of the ONU

Method used

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  • A data transmission method, device and system
  • A data transmission method, device and system
  • A data transmission method, device and system

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Embodiment Construction

[0057] The basic idea of ​​the present invention is: OLT allocates uplink transmission control parameters for all ONUs, and sends the uplink transmission control parameters to the ONUs; each ONU processes the input uplink data according to the uplink transmission control parameters to obtain OFDM modulation signals, and According to the uplink sending control parameters, the OFDM modulated signal is sent to the OLT by using the optical carrier of the same wavelength.

[0058] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] The invention provides a data transmission system, Figure 4 It is a schematic diagram of the structure of the data transmission system of the present invention, such as Figure 4 As shown, the system includes: OLT 41 and ONU 42; wherein,

[0060] The OLT 41 is configured to distribute uplink transmission control parameters for all ONUs, and send the allocated up...

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Abstract

The invention discloses a data transmission method, device and system. The method comprises: an optical line terminal (OLT) allocates uplink transmission control parameters to all optical network units (ONUs), and sends the allocated uplink transmission control parameters to the ONUs; Each ONU processes the input uplink data according to the uplink transmission control parameters to obtain an Orthogonal Frequency Division Multiplexing (OFDM) modulated signal, and according to the uplink transmission control parameters, uses the same wavelength of the optical carrier to send the OFDM modulated signal to the OLT. According to the technical solution of the present invention, the uplink colorless data transmission solution in the OFDM-PON system is realized.

Description

technical field [0001] The invention relates to a passive optical network system of orthogonal frequency division multiplexing, in particular to a data transmission method, device and system. Background technique [0002] In recent years, due to the laying of a large number of optical fibers and the application of new technologies such as wavelength division multiplexing, the backbone optical fiber network has undergone breakthrough development within a few years. At the same time, due to the advancement of Ethernet technology, the bandwidth of the LAN dominated by it has also changed from 10M, 100M to 1G or even 10G. At present, the place where a breakthrough is most needed lies in the section between the network backbone and the local area network and home users, which is often referred to as the "last mile". Among various technologies, a passive optical network (PON, Passive Optical Network) technology has gained widespread attention. figure 1 is a schematic diagram of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04Q11/00
Inventor 李巨浩姜松朱松林郭勇印永嘉刘欣付志明耿丹张伟良
Owner ZTE CORP