Optical network data transmission method as well as system and equipment thereof

A technology for sending data and sending equipment, applied in the field of optical communication, it can solve problems such as service interruption, poor user experience, and reduced user satisfaction, saving ranging time, reducing interruption time, and ensuring continuity.

Active Publication Date: 2009-10-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Capacity expansion is an inevitable trend in the development of PON networks. With the large increase in the number of ONUs connected to the PON, when re-ranging is required during service operation (such as the occurrence of the above-mentioned master-standby switchover), if still Using the re-ranging method provided in the existing standards, for those services that require high service delays, such as TDM (Time Division Multiplex, time divis

Method used

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  • Optical network data transmission method as well as system and equipment thereof
  • Optical network data transmission method as well as system and equipment thereof
  • Optical network data transmission method as well as system and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0058] Example 1

[0059] When the backbone fiber of the main OLT in the PON network fails (or the main OLT fails), the PON network needs to perform a main-standby switchover to switch data to the standby OLT. This embodiment is based on figure 2 The schematic diagram of the active / standby switch provided is taken as an example. During the switchover of the active and standby OLTs, due to the difference in the length of the active and standby backbone fibers, the standby OLT is the new active OLT. The ONU performs re-ranging processing. In order to reduce the ranging time required for performing ranging processing on all the connected ONUs and reduce the service interruption time, an embodiment of the present invention provides a method for transmitting data on an optical network. See image 3 In this embodiment, the main-use OLT's backbone fiber fails and needs to be switched as an example for description. The content of the method is as follows:

[0060] 101: The active OLT det...

Example Embodiment

[0097] Example 2

[0098] In the PON network, due to the main and standby OLT switching caused by the failure of the backbone fiber, each ONU needs to obtain a new EqD value due to the difference in parameters such as the length of the main and backup backbone fibers, see Figure 5 , The embodiment of the present invention provides a system for transmitting data on an optical network, the system includes: a transmitting device, a ranging device, and a non-ranging device, where:

[0099] The sending device is used to obtain the first round-trip delay Rtd value of the ranging device and the non-ranging device; it is also used to send a ranging request to the ranging device, and obtain the second value of the ranging device according to the ranging response of the ranging device. Round trip delay Rtd value; according to the first Rtd value and second Rtd value of the ranging device, obtain the change value of the Rtd value; when the change value is obtained, obtain the change value a...

Example Embodiment

[0119] Example 3

[0120] See Figure 7 An embodiment of the present invention provides a device for sending data on an optical network, and the device includes:

[0121] The acquisition module is used to acquire the first round-trip delay Rtd value of the ranging device and the non-ranging device (that is, the Rtd value on the active OLT);

[0122] The ranging module is used to send a ranging request to the ranging device, and obtain the second round-trip delay Rtd value of the ranging device (that is, the Rtd value on the standby OLT) according to the ranging response of the ranging device;

[0123] The difference module is configured to obtain the change value of the Rtd value according to the first Rtd value of the ranging device obtained by the obtaining module and the second Rtd value of the ranging device obtained by the ranging module;

[0124] The processing module is configured to obtain the second Rtd value of the non-range-finding device according to the change value ob...

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Abstract

The invention discloses an optical network data transmission method as well as a system and equipment thereof, belonging to the field of optical communication. The method comprises the steps of obtaining the respective first roundtrip delay Rtd value of ONU; obtaining the second roundtrip delay Rtd value of distance measurement ONU; obtaining the change value of the Rtd value according to the first Rtd value and the second Rtd value of the distance measurement ONU; obtaining the second Rtd value of non-distance-measurement ONU according to the change value and the first Rtd value of the non-distance-measurement ONU; and obtaining and transmitting the corresponding isostatic delay EqD value of the ONU according to the obtained respective second Rtd value of the ONU. The system comprises transmission equipment, distance measurement equipment and non-distance-measurement equipment. The equipment comprises an obtaining module, a distance measurement module, a difference value module, a processing module and a transmission module. When the phenomena of main optical fiber faults or main OLT equipment faults, and the like occur in a PON network, main and standby conversion is triggered and performed. The invention only needs to perform distance measurement for one ONU, so the distance measurement time is saved. Especially when a plurality of ONUs exist, the invention can obviously reduce service interruption and meet the requirements of service which is carried by the PON network and has higher time delay requirements.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a method, system and equipment for sending data by an optical network. Background technique [0002] In the current field of optical communication technology, PON (passive optical network, passive optical network) technology is widely used as a point-to-multipoint optical access technology, see figure 1 , the PON network is composed of OLT (Optical Line Terminal; Optical Line Terminal), OS (Optical Splitter, Optical Splitter) and ONU (Optical Network Unit, Optical Network Unit). The OS connects each ONU through a separate branch fiber; among them, in the downlink direction (the transmission direction from the OLT to the ONU, usually using 1490 nm wavelength to carry the service transmission), the OS realizes the optical splitting function, and the downlink light of the OLT is transmitted through the branch fiber The signal is sent to all ONUs; in the upstream direction (the ...

Claims

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Application Information

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IPC IPC(8): H04Q11/00
CPCH04J3/0641H04Q2011/0081H04J3/0682H04Q11/0067H04J3/0652
Inventor 杨素林牛乐宏
Owner HUAWEI TECH CO LTD
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