Wavelength allocation method of WDM-PON system

A technology of WDM-PON and wavelength allocation, which is applied in the field of wavelength allocation of WDM-PON systems, and can solve the problem that ONU does not know to use interaction

Inactive Publication Date: 2010-01-06
FENGHUO COMM SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that in the initial state of ...

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  • Wavelength allocation method of WDM-PON system
  • Wavelength allocation method of WDM-PON system
  • Wavelength allocation method of WDM-PON system

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is a schematic diagram of the WDM-PON system structure, such as figure 1 As shown, the WDM-PON system includes an optical line terminal (OLT). The OLT outputs the optical signal through the multiplexer / demultiplexer AWG at the OLT end. Output to multiple optical network units (ONUs). The OLT is provided with a wavelength management table for managing the wavelength used for business communication of each downlink ONU. The wavelength management table is used for wavelength division multiplexing communication between the OLT and the ONU. Wherein, the OLT includes an IEEE802.3ah OAM extension unit, a wavelength control unit, and several optical module units on this side, and the ONU includes an IEEE802.3ah OAM extension unit, a wavelength control unit, and an optical module unit on this side.

[0030] The present invention provides a WDM-PON syste...

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Abstract

The invention discloses a wavelength allocation method of a WDM-PON system, which comprises the following steps: extending an OAM frame, adding wavelength management information and defining a special wavelength for sending control messages; carrying out the interaction of the control messages through wavelength management units in an OLT and an ONU and allocating upstream wavelengths and downstream wavelengths used for service allocation communication; and realizing data communication between the OLT and the ONU according to the successfully allocated upstream wavelengths and the downstream wavelengths used for the service communication. The method adds the wavelength management information into an Organization specific information TLV field by an INFO message in a discovery process of IEEE 802.3ah OAM, and other fields in the message are not modified, thus the method has clear and simple processing and flexible configuration. Hardware units in a system donot need to be modified, and processing is carried out completely depending on a software unit, thus the cost is lower. The speed and the accuracy of the data transmission of the system are greatly improved, and meanwhile, the complexity of the network operation and maintenance of the system is also reduced.

Description

technical field [0001] The invention relates to a WDM-PON system, in particular to a wavelength allocation method of the WDM-PON system. Background technique [0002] WDM-PON system has many technical advantages. First of all, the WDM-PON system can transparently transmit all business flows of various protocols; secondly, the WDM-PON system can upgrade the bandwidth without changing the physical equipment, so it can adapt to the bandwidth demand for a long time in the future and make the service life of the equipment longer. Long; Third, because the WDM-PON system allocates a wavelength for each ONU, different users do not share information, so there is no security problem that the signal can be received by all users in the WDM-PON system. [0003] The WDM-PON system can use injection locking, reflective semiconductor optical amplifier (RSOA) or tunable laser to realize the colorless design of the remote ONU optical module. Especially on the ONU side, the tunable laser mod...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04J14/02
Inventor 朱丽丽张傲樊海东
Owner FENGHUO COMM SCI & TECH CO LTD
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