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ONU, method and system for optical power adjustment

A technology of optical power and power, applied in the field of optical network, can solve the problem of not being able to adjust and affect at one time, and achieve the effect of improving quality and small variation range

Inactive Publication Date: 2009-12-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the applicant found that in the process of using this method: since BER reflects a relatively long-term process, using BER as a decision factor for optical power adjustment may affect normal business communications; and the adjustment of optical power initiated by the OLT requires the OLT to send Adjust the PLOAM message of the optical power to the ONU, and then wait for the response from the ONU, it cannot be adjusted in place at one time

Method used

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  • ONU, method and system for optical power adjustment
  • ONU, method and system for optical power adjustment
  • ONU, method and system for optical power adjustment

Examples

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Embodiment 1

[0043] The ONU in Embodiment 1 is such as image 3 As shown, it includes a transmit optical power adjustment control module and an optical transceiver. The transmit optical power adjustment control module monitors the downlink received optical power / bit error rate, and judges whether the actually measured downlink received optical power is within the preset downlink received bit error rate / bit error rate within the normal variation range. For corresponding processing, it further includes a receiving optical power measurement module, an optical power change judgment module, and a sending optical power adjustment module. The received optical power measurement module measures the downlink received optical power when the optical transceiver receives downlink data; the optical power change judgment module judges whether the actually measured downlink received optical power is within the preset normal variation range of the downlink received optical power Within; the transmit optic...

Embodiment 2

[0044] The ONU in the second embodiment is as Figure 4 As shown, it includes a transmit optical power adjustment control module and an optical transceiver. The transmission optical power adjustment control module includes a reception bit error rate measurement module, a bit error rate change judgment module, a transmission optical power adjustment module and an optical transceiver. The receiving bit error rate measurement module counts the bit error rate of the downlink received data when the optical transceiver receives the downlink data; the bit error rate change judging module judges whether the actually counted downlink received optical power is within the preset downlink receiving error rate. Within the normal variation range of the code rate; the transmission optical power adjustment module adjusts the uplink transmission optical power when the optical transceiver transmits data according to the judgment result of the bit error rate change judgment module, and the adjus...

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Abstract

The embodiment of the invention discloses a method for optical power adjustment, which comprises the following steps: when an ONU receives downlink data, monitoring downlink receiving optical power or bit error rate; according to a normal variation range of downlink receiving optical power or bit error rate acquired in advance, judging whether the downlink receiving optical power or the bit error rate acquired by monitoring exceed the normal variation range; and when the downlink receiving optical power or the bit error rate exceed the normal variation range, adjusting uplink sending optical power through the ONU. The invention also discloses the ONU and a system for optical power adjustment. By using the embodiment of the invention, the ONU autonomously realizes optical power adjustment, so the variation range of the receiving optical power of an OLT is small, and the quality of communication in an uplink direction is improved.

Description

technical field [0001] The invention relates to the field of optical networks, in particular to an ONU and a method and system for adjusting optical power. Background technique [0002] The PON system consists of three parts: optical line terminal OLT, optical distribution network ODN and optical network terminal ONU / optical network unit ONT. The OLT provides a network-side interface for the PON system and connects to one or more ODNs. ODN is a passive optical splitting device, which splits and transmits the downstream data of the OLT to each ONU, and simultaneously transmits the upstream data of multiple ONUs / ONTs to the OLT. The ONU provides the user-side interface for the PON system, and is connected to the ODN in the uplink. If the ONU directly provides the user port function, such as the Ethernet user port for the PC to access the Internet, it is called an ONT. Unless otherwise specified, the ONU mentioned below collectively refers to ONU and ONT. [0003] In the PON...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/17H04B10/20H04B10/075H04B10/293
Inventor 杨素林
Owner HUAWEI TECH CO LTD
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