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ONU management method, OLT and system in a passive optical network

A management method and network unit technology, applied in the field of optical line terminals and systems, can solve the problems that the size of the quiet window cannot meet the loop delay at the same time, reduce the efficiency of PON uplink transmission, and uplink optical signal conflicts, so as to improve the uplink transmission efficiency , improve efficiency and reduce the effect of uplink bandwidth

Active Publication Date: 2022-02-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the OLT opens a quiet window for the ONU connected to the PON system for ONU registration, but the size of the quiet window opened by the OLT cannot simultaneously meet the above-mentioned loop delays of the farthest and nearest ONUs from the OLT, that is: distance When the upstream optical signal sent by the farthest or nearest ONU of the OLT reaches the OLT, it will exceed the range of the quiet window, and conflict with the upstream optical signal of other normal working ONUs.
[0004] In order to solve the above problems, the OLT can also open a relatively large (greater than the standard) quiet window for ONU registration, but this will waste the upstream bandwidth and reduce the upstream transmission efficiency of the PON

Method used

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  • ONU management method, OLT and system in a passive optical network
  • ONU management method, OLT and system in a passive optical network
  • ONU management method, OLT and system in a passive optical network

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Embodiment 1

[0162] In the embodiment of the present invention, the ONUs that the OLT needs to manage cover a wide range, and when the path loss between the ONU closest to the OLT and the ONU farthest is greater than 15dB, a distance extension box needs to be added to the PON system, such as Figure 9 shown. The distance extension box amplifies the uplink optical signal and downlink optical signal passing through the distance extension box, which is used to compensate for the path loss of the ONU farther away from the OLT, so that the uplink optical signal sent by the ONU closest to the OLT and the ONU farthest from the OLT reaches the OLT When the optical power difference is less than 15dBm.

[0163] The topology of the PON system adding the distance extension box is as follows: Figure 9 As shown, the ONU closer to the OLT is connected to the first optical splitter, the ONU farther away from the OLT is connected to the second optical splitter, the second optical splitter is connected to...

Embodiment 2

[0168] In the embodiment of the present invention, the ONU that the OLT needs to manage covers a wide range. When the path loss of the ONU is greater than 15dB, a distance extension box needs to be added to the PON system, such as Figure 10 shown. The distance extension box amplifies the uplink optical signal and downlink optical signal passing through the distance extension box for the path loss of the ONU, so that the optical power of the uplink optical signal sent by the ONU when it reaches the OLT is less than 15dBm.

[0169] The topology of the PON system adding the distance extension box is as follows: Figure 10 As shown, the ONU is connected to the third optical splitter 1 or the third optical splitter 2, both the third optical splitter 1 and the third optical splitter 2 are connected to the distance extension box, and the distance between the RE and the connected ONU is 0 to 20km, Or 0 to 40km, the distance extension box is connected to the OLT through an optical tr...

Embodiment 3

[0173] In the embodiment of the present invention, the ONU that the OLT needs to manage covers a wide range. When the path loss of the ONU is greater than 15dB, a distance extension box needs to be added to the PON system, such as Figure 11 shown. The distance extension box amplifies the uplink optical signal and downlink optical signal passing through the distance extension box for the path loss of the ONU, so that the optical power of the uplink optical signal sent by the ONU when it reaches the OLT is less than 15dBm.

[0174] The topology of the PON system adding the distance extension box is as follows: Figure 11 As shown, the ONU is connected to the third optical splitter 3 or the third optical splitter 4, the third optical splitter 3 is connected to the first distance extension box, the third optical splitter 4 is connected to the second distance extension box, and the first RE or the second The distance between the RE and the ONU connected to it is 0 to 20km, or 0 t...

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Abstract

Embodiments of the present invention provide a method for managing ONUs in a passive optical network, an OLT, and a system. The method includes: determining a first quiet window and a second quiet window; The first quiet window is allocated to the ONUs within the second preset distance range; wherein, the distance between the ONUs within the first preset distance range and the optical line terminal OLT is less than the second preset distance The distance between the ONU and the OLT within the distance range.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a management method for an Optical Network Unit (ONU, Optical Network Unit) in a Passive Optical Network (PON), an Optical Line Terminal (OLT, Optical Line Terminal) and a system. Background technique [0002] With the development of network technology, the network can be used to transmit a large number of voice, data, video and other services, and now there are new services such as virtual video, so the requirements for bandwidth continue to increase, and the 40G rate PON is produced under this demand of. [0003] The topology of the PON system is as follows figure 1 As shown, the PON system usually consists of an optical line terminal (OLT) at the office side, an ONU at the user side, and an optical distribution network (ODN, Optical Distributed Network), and usually adopts a point-to-multipoint network structure. ODN is composed of single-mode optical fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04W4/021H04L43/0864
CPCH04L43/0864H04Q11/0062H04Q11/0067H04W4/021H04Q11/00H04Q2011/0064H04J3/0682H04J3/1605H04J14/0282H04Q2011/0079H04Q2011/0088
Inventor 耿丹杨波黄新刚马壮袁立权张伟良
Owner ZTE CORP
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