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Controlled multicast method and system for wave complex optical network

A passive optical network and wavelength division multiplexing technology, which is applied in the direction of wavelength division multiplexing system, etc., can solve the problems of optical line terminal OLT processing performance bottleneck, inability to transparent transmission, etc.

Active Publication Date: 2007-10-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, an independent multicast wavelength is used to transmit multicast data, which solves the problem that the multicast service cannot be transparently transmitted on the arrayed waveguide grating AWG when a specific wavelength is transmitted in WDM-PON; it solves the problem of in-band multi-copy transmission Multicast optical line terminal OLT handles performance bottlenecks; saves user unicast wavelength bandwidth; and realizes controlled multicast in WDM-PON

Method used

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  • Controlled multicast method and system for wave complex optical network
  • Controlled multicast method and system for wave complex optical network
  • Controlled multicast method and system for wave complex optical network

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Experimental program
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Embodiment 1

[0086] The present invention provides a multiplexer / demultiplexer for WDM-PON optical distribution network, which not only has AWG function but also can transparently transmit certain specific wavelengths, as shown in FIG. 2 .

[0087] As shown in Figure 2, in this embodiment, the multiplexing and demultiplexing device includes at least one input terminal and a plurality of output terminals, wherein the multiplexing and demultiplexing device receives at least one or more wavelengths received by the input terminal The optical signal of the multicast wavelength is separated, and the optical signal of the separated multicast wavelength is divided into power and output on all output terminals; at the same time, the optical signal of the unicast wavelength is wavelength-selectively output, so that the unicast An optical signal of a wavelength is output at an output port.

[0088] In addition, the multiplexing and demultiplexing device can also synthesize the optical signals of diff...

Embodiment 2

[0100] Using the multiplexing and demultiplexing devices described above, a wavelength division multiplexing passive optical network supporting controlled multicast can be formed, as shown in FIG. 4 .

[0101] The network at least includes: an optical line terminal OLT, an optical distribution network having a multiplexer and a demultiplexer at a remote node, and at least one optical network unit; wherein the optical line terminal OLT separates the multicast Data and unicast data, and the multicast data and unicast data are respectively modulated into the optical signal of the multicast wavelength and the optical signal of the unicast wavelength, mixed and then sent to the multiplexer and demultiplexer; and through the unicast broadcast data channel to control the multicast data;

[0102] The multiplexer and demultiplexer receive and process the mixed optical signal, and output the optical signal of the multicast wavelength on all output ports; at the same time, the optical si...

Embodiment 3

[0136] The controlled multicast method used in the above network system will be described in detail below.

[0137] The method includes: the optical line terminal OLT separates the multicast data from the received data stream, modulates it into the optical signal of the multicast wavelength, mixes it with the modulated optical signal of the unicast wavelength, and transmits it to the multiplexing and demultiplexing a multiplexer, and control the multicast data through a unicast data channel;

[0138] The multiplexing and demultiplexing device performs power division on the optical signal of the multicast wavelength, and transmits it to the corresponding optical network unit;

[0139] The optical network unit receives the optical signal output by the multiplexer and demultiplexer, separates the multicast data, and processes the multicast data.

[0140] In this embodiment, the multiplexing and demultiplexing device performing power division on the optical signal of the multicas...

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Abstract

A controlling multicasting method used on WDM passive optical network includes receiving multicast data separated from received data stream by optical link terminal and modulating multicast data into optical signal of multicast wavelength, mixing said optical signal with optical signal of modulated single-cast wavelength then sending mixed signal to multiplexer / de-multiplexer, using single-cast data channel to control said multicast data, carrying out power-division on optical signal multicast wavelength then sending power-divided optical signal to optical network unit, separating out multicast data and processing separated out multicast data by optical network unit.

Description

technical field [0001] The present invention relates to the field of optical communication technology, in particular to the field of wavelength division multiplexing passive optical network (WDM-PON:Wavelength Division Muiplexing Passive Optical System), specifically a controlled multicast method for WDM-PON and system. Background technique [0002] At present, many Internet services pass through dial-up modems, asymmetric digital line subscriber lines (ADSL: Asymmetric Digital Subscriber Line), cable modems (CM: Cable MODEM), very high-speed digital subscriber lines (VDSLVery- high-bit-rate Digital Subscriber loop) and other ways to access. However, in order to provide various services, such as high-quality video information services and video on demand (VoD: Video on Demand) services, data transmission requires about 100M bandwidth, which cannot be met by the above access methods. [0003] Therefore, the demand for laying access networks with optical fibers is growing ra...

Claims

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Application Information

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IPC IPC(8): H04J14/02
Inventor 王运涛林华枫黄伟赵峻江涛
Owner HUAWEI TECH CO LTD
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