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A method and system for switching active and standby channels based on passive optical network

A channel switching system and passive optical network technology, applied in the field of passive optical network, can solve the problems of ONU service interruption, affecting system stability, and long time-consuming switching process, so as to reduce channel switching time, improve system stability, The effect of improving user experience

Active Publication Date: 2016-02-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] It can be seen that the existing channel switching process performs backup channel ranging after the backup channel is enabled, so the switching process takes a long time, which is not conducive to the quick restoration of normal communication between the ONU and the OLT (the time-consuming is basically on the order of 100 milliseconds or more), and cannot Meet the user's requirements for fast recovery of network failures; in addition, in the hybrid PON shown in Figure 2, when an OLT or an ONU under a PON port of the OLT needs higher bandwidth, the OLT needs to transfer part of the ONUs to other Work under the OLT or other PON ports, the part of the ONU needs to be re-registered and activated after the transfer, which may cause the service interruption of the part of the ONU and affect the system stability

Method used

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  • A method and system for switching active and standby channels based on passive optical network
  • A method and system for switching active and standby channels based on passive optical network
  • A method and system for switching active and standby channels based on passive optical network

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Experimental program
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Embodiment 1

[0104] in such as Figure 7 In the hybrid PON shown, when an OLT or an ONU under a PON port of the OLT needs higher bandwidth, the OLT needs to transfer some ONUs to other OLTs or other PON ports for work, or when channel switching occurs Finally, the ONU needs to switch to other OLT or other PON of the OLT to work. The OLT and the ONU use the following main steps to complete the fast channel switching of the ONU:

[0105] The working OLT1 (OLT2, OLT3...OLTn) notifies all ONUs in this group of the wavelength value corresponding to the standby channel OLT;

[0106] The working OLT1 (OLT2, OLT3...OLTn) instructs an ONU in this group of ONUs to adjust its wavelength to the wavelength channel corresponding to the standby OLT;

[0107] The backup OLT and the above ONU complete the ranging of the backup channel, and order the ONU to adjust the wavelength back to the wavelength channel corresponding to OLT1 (OLT2, OLT3...OLTn) (or, the backup OLT and the above ONU complete the measu...

Embodiment 2

[0121] In the hybrid PON shown in Figure 2, when an OLT or an ONU under a PON port of the OLT needs higher bandwidth, the OLT needs to transfer some ONUs to other OLTs or other PON ports for work, or When a channel switch occurs, the ONU needs to switch to another OLT or another PON of the OLT to work. The OLT and the ONU use the following main steps to complete the fast channel switch of the ONU:

[0122] method one

[0123] The OLT1 (OLT2, OLT3...OLTn) in operation notifies all ONUs in this group of the wavelength value corresponding to the backup channel OLT (the backup channel can be one or more OLTs);

[0124]The working OLT1 (OLT2, OLT3...OLTn) instructs an ONU in this group of ONUs to adjust its wavelength to the wavelength channel corresponding to the standby OLT;

[0125] The standby OLT and the above ONU complete the ranging of the standby channel, and order the ONU to adjust the wavelength back to the wavelength channel corresponding to OLT1 (OLT2, OLT3...OLTn);

...

Embodiment 3

[0139] This embodiment describes the situation of EPON and 10GEPON, the OLT stores the ranging result, and the ONU does not need to store the ranging result, such as Figure 7 In the hybrid PON shown, when an OLT or an ONU under a PON port of the OLT needs higher bandwidth, the OLT needs to transfer some ONUs to other OLTs or other PON ports for work, or when channel switching occurs Finally, the ONU needs to switch to other OLT or other PON of the OLT to work. The OLT and the ONU use the following main steps to complete the fast channel switching of the ONU:

[0140] method one

[0141] 1. The working OLT1 (OLT2, OLT3...OLTn) notifies all ONUs in this group of the wavelength value corresponding to the OLT of the backup channel;

[0142] 2. The working OLT1 (OLT2, OLT3...OLTn) instructs one ONU in this group of ONUs to adjust its wavelength to the wavelength channel corresponding to the standby OLT;

[0143] 3. The backup OLT and the above ONU complete the ranging of the bac...

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PUM

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Abstract

The invention discloses a method used for switching a main channel and a spare channel and based on a PON. The method comprises the steps that an ONU (optical network unit) is regulated to the spare channel, and an OLT (optical line terminal) performs spare channel ranging for the ONU on the spare channel to acquire the ranging value of the spare channel; after the spare channel ranging is finished, the ONU is regulated back to the main channel; and the ONU finishes the switching from the main channel to the spare channel according to the ranging value. The invention further discloses a system used for switching the main channel and the spare channel and based on the PON correspondingly. Because the acquired ranging value can be used directly during the channel switching, the method and the system can reduce the channel switching time, improve the user experience, avoid service interruption of the ONU, and improve the system stability.

Description

technical field [0001] The present invention relates to a passive optical network (Passive Optical Network, PON) technology, in particular to a passive optical network-based master and backup channel switching method and 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, so the requirements for bandwidth continue to increase, and the passive optical network (PON) is produced under this demand. [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 optical network unit (ONU) at the user side, and an optical distribution network (ODN), and usually adopts a point-to-multipoint network structure. ODN is composed of passive optical components such as single-mode optical fibers, optical splitters, and optical connectors, and provides optical transmissio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/032H04B10/07
Inventor 耿丹张伟良张德智朱松林马壮袁立权印永嘉何子安
Owner ZTE CORP