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A kind of orthogonal frequency division multiplexing passive optical network data transmission method and optical network unit

A technology of optical network unit and line data, which is applied in the field of communication systems, can solve the problems that ONU cannot achieve colorlessness, needs to be changed, and high cost, and achieves the requirements of colorlessness, device speed reduction, and cost reduction.

Active Publication Date: 2015-08-12
ZTE CORP
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Problems solved by technology

(5) Transfer the cost pressure of optical devices to electrical devices. Due to the integration and manufacturing process of optical devices, the cost of high-speed optical devices is very high. At present, optical modules and optical devices above 10G are under great pressure for access networks
This method is not only costly, but also needs to change the structure of the original ODN, and the ONU cannot achieve colorless
[0007] Therefore, the current single-band OFDM PON solution has major problems in terms of device cost, ODN compatibility and ONU colorlessness

Method used

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  • A kind of orthogonal frequency division multiplexing passive optical network data transmission method and optical network unit
  • A kind of orthogonal frequency division multiplexing passive optical network data transmission method and optical network unit
  • A kind of orthogonal frequency division multiplexing passive optical network data transmission method and optical network unit

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Embodiment

[0086] System architecture such as Figure 6 As shown, the OLT transmitter includes an OLT control unit and multiple parallel downlink data transmission processing units, and each downlink data transmission processing unit corresponds to processing data of a sub-band. The OLT control unit configures and manages the parameters of each module of each parallel downlink data transmission processing unit of the OLT through the internal control interface, and the OLT control unit communicates with each ONU control unit in real time through the control protocol command, and the control protocol command passes OFDM PON The common communication channel is sent to each ONU in real time. After the ONU control unit receives the real-time control protocol instruction sent by the OLT control unit to the ONU, it sends the operation content and parameters to each module of the ONU downlink data receiving and processing unit in real time to realize dynamic real-time control of the ONU.

[008...

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Abstract

The present invention provides an optical network unit (ONU) comprising an optical reception processing unit and a downlink data reception processing unit. The optical reception processing unit receives an optical signal, converts the optical signal into a radio frequency signal, and transmits the radio frequency signal to the downlink data reception processing unit. The downlink data reception processing unit performs wave filtering, demodulation, and demapping on the radio frequency signal, and outputs sub-band data corresponding to the ONU. The present invention also provides a data transmission method. In the present invention, because each ONU only receives current and specific sub-band data, the speed rates required of components therein are reduced, which in turn reduces cost.

Description

technical field [0001] The present invention relates to a communication system, in particular to an OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) PON (Passive Optical Network, Passive Optical Network) system data transmission method and an optical network unit. Background technique [0002] The wide application of Orthogonal Frequency Division Multiplexing (OFDM) technology has injected new vitality into optical communication. OFDM technology dynamically allocates high-speed serial bit information to sub-carriers with mutually orthogonal spectrums. At the same time, each sub-carrier adopts high-order modulation modes such as quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM), which effectively improves the system performance. Spectral efficiency. More importantly, the duration of the data signal of the optical OFDM symbol on each subcarrier is relatively increased, coupled with the adoption of the cyclic pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04L27/26
CPCH04L27/2647H04B10/548H04L27/2633
Inventor 朱松林郭勇张伟良耿丹陈武
Owner ZTE CORP
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