Method for diagnosing constant optical network units in Ethernet passive optical network

A passive optical network and network unit technology, applied in the field of time division multiple access communication, can solve the problem of ONU not working normally, and achieve the effects of good deployment, improved satisfaction, and improved reliability

Active Publication Date: 2011-05-25
北京格林伟迪科技股份有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the main purpose of the present invention is for existing in the prior art when a certain ONU breaks down (such as long light) and can't be synchronized with OLT, ONU turns on the laser in the wrong time slot, thus causes the same ether passive light For the technical problem that other ONUs under the network cannot work normally, a method for diagnosing long-emitting optical network units in passive optical networks can be quickly located by setting virtual ONUs.

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  • Method for diagnosing constant optical network units in Ethernet passive optical network
  • Method for diagnosing constant optical network units in Ethernet passive optical network
  • Method for diagnosing constant optical network units in Ethernet passive optical network

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Embodiment 1

[0028] In the method for diagnosing long-emitting optical network units in the Ethernet passive optical network EPON of this specific embodiment, a plurality of optical network units ONUs connected to the optical line terminal OLT are arranged in the described Ethernet passive optical network, and the method specifically includes The following steps:

[0029] Step 1: Realize the function of receiving optical power detection on the OLT equipment, so that it periodically detects the value of the received optical power of each ONU, stores the values ​​detected in the last five cycles, and calculates the average optical power.

[0030] Step 2, the OLT allocates a time slot for sending data to each of the ONUs through the dynamic bandwidth allocation DBA agent module, and actively adds a virtual ONU, that is, allocates a different virtual time slot, and allocates a corresponding startTime to it (send start time) and length (send data time length). Each ONU should not send data in ...

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Abstract

The invention provides a method for diagnosing constant optical network units in an Ethernet passive optical network. Each optical line terminal (OLT) in the Ethernet passive optical network is connected with a plurality of optical network units (ONU). The method comprises the following steps that: when the OLT distributes and sends time slots of data to the ONUs, the OLT distributes a different virtual time slot to each ONU additionally; each ONU only sends data in the distributed time slot, and does not send data in the virtual time slot, so the stronger optical power is not detected in the virtual time slot; and the OLT periodically detects the optical power in the virtual time slot so as to judge whether a detection value is greater than a threshold, if so, determines that certain ONU in a constant state or other constant light sources exist under the OLT, and otherwise determines that all ONUs under the OLT are in a normal state. The method can quickly diagnose whether the constant ONUs exist in the Ethernet passive optical network.

Description

technical field [0001] The present invention relates to time division multiple access (Time Division Multiple Access, TDMA) communication technology, specifically relates to a kind of diagnosis Ethernet Passive Optical Network (Ethernet Passive Optical Network, EPON) medium and long light optical network unit (Optical Network Unit, ONU) Methods. Background technique [0002] Ethernet Passive Optical Network (EPON) adopts a point-to-multipoint topology, and the uplink adopts time-division multiplexing, and the uplink signal works in burst mode, which requires each optical network unit (Optical Network Unit, ONU) only turns on the laser in its own time slot window. EPON is equipped with an optical line terminal OLT (Optical Line Terminal, OLT), which is used to connect the terminal equipment of the optical fiber trunk line. Its functions generally include: 1. Send Ethernet data to the ONU in broadcast mode; 2. Initiate and control the ranging process , and record the ranging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04B10/07
Inventor 张新辉杜志阔刘冬盖鹏飞
Owner 北京格林伟迪科技股份有限公司
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