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Uplink transmission method and device in a wdm PON system

A generation device and processing device technology, which is applied in the transmission system, wavelength division multiplexing system, electromagnetic wave transmission system, etc., to achieve the effects of reducing spectral bandwidth, improving transmission performance, and suppressing side modes

Active Publication Date: 2020-04-07
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Claims
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Problems solved by technology

[0005] In order to at least partly solve the above and other potential problems, embodiments of the present disclosure propose an uplink optical signal generation method in a WDMPON system, an uplink optical signal generation device in an optical network unit, and an optical signal processing device in an optical fiber line terminal

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  • Uplink transmission method and device in a wdm PON system
  • Uplink transmission method and device in a wdm PON system

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[0046] In the following, based on the embodiment scheme disclosed by the present invention in Fig. 2, the transmission experiments of 2.5Gb / s OOK and 24-channel 20MHz OFDM signals are carried out, and the transmission performance is compared with the traditional mirror reflection scheme. For the WDM-PON system, 2.5Gb / s NRZ-OOK 2^31-1PRBS data is loaded onto the modulator for experimentation. Figure 5A , 5B They are the comparison of the transmission performance of the self-injection scheme proposed in the embodiment and the traditional mirror reflection scheme for NRZ-OOK data. It can be seen from the comparison of the received signal eye diagrams that whether it is back-to-back (B2B) or after 20km transmission, Figure 5A In the self-injection scheme proposed in the embodiment of the present invention, the signal eye diagrams received by the receiving end are all open, and the measured BER (bit error rate) is all less than 10^-9, and the receiver sensitivity is preferably - ...

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Abstract

The invention provides an uplink transmission method and device in a WDM PON system. An optical network unit ONU generates an initial uplink optical signal; a downlink wavelength position in the initial uplink optical signal is separated; an array waveguide raster is arranged in a remote node RN, which cuts and multiplexes the multiple initial uplink optical signals coming from the ONU into the initial uplink optical signal having multiple uplink sub-wavelengths; an optical line terminal (OLT) performs bandwidth compression and reflection on the initial uplink optical signal having multiple uplink wavelengths; the uplink sub-wavelength in a reflected uplink optical signal is transmitted to the ONU after de-multiplexing through an array waveguide raster; and the ONU (optical network unit) modulates uplink data on the corresponding uplink sub-wavelength. The uplink transmission method and device in the WDM PON system provide a narrow band seed spectrum to the uplink signal of the WDM PONsystem, reduce a spectrum bandwidth while inhibiting a side mode and improve transmission performance.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to the field of access network technology, in particular to an uplink signal transmission method and device thereof in a WDMPON (Wavelength Division Multiplexing Passive Optical Network) system. Background technique [0002] The integration of fixed access and mobile fronthaul is the basis for future next-generation optical access networks. With its large capacity and high transparency, the WDMPON system has become the most ideal network structure for integrating fixed access and mobile fronthaul. Moreover, it can provide support for the "baseband unit pooling" of mobile fronthaul with low cost and less energy consumption. Here, "pooling" in the mobile fronthaul solution refers to separating the BBU (baseband unit) and RRH (remote radio unit) of the base station, and placing multiple baseband units at the same place for common use, which can improve hardware utiliza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J14/02H04B10/67H04B10/69
CPCH04B10/673H04B10/6911H04B10/6931H04J14/0249
Inventor 孙晓高震森胡小锋
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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