Method, system and device for adjusting register window of passive optical network (PON)

A passive optical network, window adjustment technology, applied in the field of communication, can solve the problem that the PON system cannot work normally, and no solution is provided.

Active Publication Date: 2011-06-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under this development trend, the actual value of the maximum physical distance and the maximum physical distance difference in the PON system may exceed the specified value in the existing standard and cause the PON system to fail to work normally
Currently, existing technologies do not provide a solution

Method used

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  • Method, system and device for adjusting register window of passive optical network (PON)
  • Method, system and device for adjusting register window of passive optical network (PON)
  • Method, system and device for adjusting register window of passive optical network (PON)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step A1, pre-configuring at least one initial registration window for providing registration to the ONU to be registered;

[0024] Step A2, sending the pre-equalization delay adapted to the initial registration window to each ONU to be registered;

[0025] Step A3, receiving the response information of the pre-equalization delay feedback sent by the ONU to be registered according to step A2, and performing ranging on each ONU to be registered;

[0026] Wherein, the response information may be the serial number of the ONU to be registered.

[0027] Further, in one embodiment, the ranging process for each ONU to be registered in step A3 may include:

[0028] Record the total time T from sending the pre-equalization delay adapted to the initial registration window to receiving the information fed back by the ONU to be registered;

[0029] The total time is subtracted from the pre-equalization delay Dp sent by step A2, the fixed delay Df of the ONU to be registered and th...

Embodiment 2

[0054] Step S11, presetting the initial configuration of the OLT.

[0055] In this embodiment, the setting of the initial configuration of the OLT may be setting an initial registration window that can meet the registration requirements of the optical network unit farthest from the optical line terminal, and the size of the initial registration window may be based on experience and actual needs depends.

[0056] Step S12, the OLT opens the registration window according to the initial configuration, and sends the pre-equalization delay suitable for the initial registration window to each ONU to be registered.

[0057] Step S13, the OLT performs distance measurement on each ONU to be registered.

[0058] In this embodiment, the ranging result of the ONUs to be registered is: the physical distance of some ONUs to be registered exceeds 20 km, and the maximum physical distance difference also exceeds 20 km.

[0059] For example, the physical distance of the closest ONU to the opt...

Embodiment 3

[0069] Step S21, presetting the initial configuration of the OLT.

[0070] In this embodiment, the setting of the initial configuration of the OLT may be setting multiple registration windows corresponding to specific physical distance segments, wherein the specific physical distance segments are 0-20 km, 20-40 km, and 40-60 km.

[0071] Step S22, the OLT opens a registration window according to the initial configuration, and sends the pre-equalization delay suitable for the initial registration window to each ONU to be registered.

[0072] Step S23 , the OLT measures the distance of each ONU to be registered, and the distance measurement result shows that the physical distance of some ONUs to be registered exceeds 20 km, and the maximum physical distance difference also exceeds 20 km.

[0073] For example, the physical distance of the closest ONU to the optical line terminal is 0 km, the physical distance of the furthest ONU is 60 km, and the maximum physical distance differe...

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Abstract

The embodiment of the invention relates to the technical field of communications and discloses a method, system and device for adjusting a register window of a passive optical network (PON). The method comprises the following steps: sending pre-equalized delay adapting to a preset initial register window to an optical network unit (ONU) to be registered; receiving information fed back by the ONU to be registered in accordance with the pre-equalized delay, and carrying out range measurement on the ONU to be registered; according to a range measurement result, adjusting the pre-equalized delay and sending the adjusted pre-equalized delay to the ONU to be registered, or simultaneously adjusting the initial register window and the pre-equalized delay, and sending the adjusted pre-equalized delay to the ONU to be registered; and receiving registration information sent by the ONU to be registered in accordance with the adjusted pre-equalized delay, and carrying out interaction with the ONU to be registered so as to register the ONU to be registered. According to the embodiment of the invention, an ONU in the PON can be ensured to carry out normal communication with an optical line terminal (OLT).

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a registration window adjustment method, system and device of a passive optical network Background technique [0002] A Time Division Multiplexing Passive Optical Network (TDM PON, Time Division Multiplexing Passive Optical Network) system consists of central office equipment and remote equipment. Such as figure 1 As shown, the central office device is an optical line terminal (OLT, Optical Line Termination), and the remote device is composed of an optical network unit (ONU, Optical Network Unit) and an optical distribution network (ODN, Optical Distribution Network). The ODN mainly includes optical fibers and Devices such as splitters. [0003] figure 1 It shows the network topology in which there are two optical splitters in the ODN. There can be multiple ONUs under one OLT. Some ONUs are under the first-level optical splitter, and some are under the second-l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/12H04Q11/00H04L12/24H04L29/06
CPCH04Q2011/0079H04J3/0682H04Q11/0067
Inventor 曾小飞董英华
Owner HUAWEI TECH CO LTD
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