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Wavelength distribution method and system in passive optical network

A passive optical network and wavelength distribution technology, applied in the field of communication, to achieve the effect of avoiding waste

Active Publication Date: 2011-01-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a wavelength allocation method and system in a passive optical network. When the colorless ONU in the WDM-PON system uses a tunable laser, the OLT can complete the pairing of wavelengths without wasting wavelength resources. The problem of wavelength allocation by ONU

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  • Wavelength distribution method and system in passive optical network
  • Wavelength distribution method and system in passive optical network
  • Wavelength distribution method and system in passive optical network

Examples

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Effect test

Embodiment 1

[0054] Embodiment 1, when the transceiver of the optical line terminal has a fixed one-to-one correspondence with the optical network unit on the user side, the method specifically includes: the transceiver in the optical line terminal uses the transceiver to transmit the downlink wavelength Send downlink data to the optical network unit corresponding to the transceiver, and carry the value of the uplink wavelength used by the transceiver in the downlink data, and the optical network unit corresponding to the transceiver uses the optical network unit corresponding to the optical network unit The downlink wavelength of the transceiver receives the downlink data and obtains the uplink wavelength used by the transceiver corresponding to the optical network unit, uses the uplink wavelength as the uplink working wavelength and uses the downlink wavelength as the downlink working wavelength to communicate with the optical line The terminal performs data interaction.

Embodiment 2

[0055] Embodiment 2, when there is no fixed one-to-one correspondence between the transceiver of the optical line terminal and the optical network unit on the user side, the method specifically includes: the transceiver in the optical line terminal uses the downlink wavelength used for transmission by the transceiver Send downlink data to the optical network unit on the user side, and carry the value of the uplink wavelength that this transceiver is used to receive in the sent downlink data. The optical network unit receives downlink data from different downlink wavelengths, selects the downlink data and parses it Get the uplink wavelength indicated in the downlink data, use the uplink wavelength as the uplink working wavelength and use the downlink wavelength as the downlink working wavelength to perform data interaction with the optical line terminal.

[0056] Under Embodiment 1 or Embodiment 2, the transceiver of the optical line terminal can send downlink data in one of the...

specific Embodiment 1

[0062] The system topology diagram of WDM-PON is as follows image 3 As shown, the laser at the ONU is a tunable laser, and there are multiple transceivers at the OLT, each transceiver corresponds to an ONU and the OLT transceiver has a fixed one-to-one correspondence with the ONU on the user side, for example, the first A transceiver corresponds to the first ONU, and the downlink wavelength of the downlink data transmitted by it is λ d1 , the upstream wavelength of the first ONU sending upstream data is λ u1, the second transceiver corresponds to the second ONU, and the downlink wavelength of the downlink data transmitted by it is λ d2 , the upstream wavelength of the second ONU sending upstream data is λ u2 ,..., the nth transceiver corresponds to the nth ONU, and the downlink wavelength of the downlink data transmitted by it is λ dn , the upstream wavelength of the nth ONU sending upstream data is λ un , the downlink data carried by the n wavelengths of the transceivers...

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Abstract

The invention discloses a wavelength distribution method and a wavelength distribution system in a passive optical network. The method comprises the following steps that: an optical line terminal (OLT) transmits downlink data to an optical network unit (ONU) by using a downlink wavelength, wherein the downlink data carries the value of an uplink wavelength used for transmitting uplink data to the optical line terminal; the optical network unit acquires the uplink wavelength according to the received downlink data; and the uplink wavelength serving as an uplink working wavelength and the downlink wavelength serving as a downlink working wavelength perform data interaction with the optical line terminal. By the method, the OLT informs the ONU of the value of the wavelength (namely an uplink wavelength value) for transmitting the uplink data by using the downlink wavelength when the ONU is on-line, so that the OLT and the ONU can utilize all usable wavelengths for the transmission of uplink and downlink service data; the conventional wavelength resources are fully utilized; and the waste of usable wavelength resources which is caused by the wavelength distribution of the ONU is avoided.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a wavelength allocation method and system in a wavelength division multiplexing passive optical network (Passive Optical Network, PON for short). Background technique [0002] Wavelength Division Multiplexing Passive Optical Network (WDM-PON for short) technology is an important technical branch of the passive optical network (PON) family. The topology of the WDM-PON system is as follows: figure 1 As shown, the passive optical network (PON) consists of an optical line terminal (Optical Line Terminal, referred to as OLT) at the office side, an optical network unit (Optical Network Unit, referred to as ONU) at the user side, and an optical distribution network (Optical Distribution Network). , referred to as ODN) composition. ODN is composed of passive optical components such as single-mode fiber, wavelength multiplexer / demultiplexer, optical connector, etc., and provides an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04Q11/00
CPCH04J14/025H04J14/0246
Inventor 耿丹张伟良朱松林
Owner ZTE CORP
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