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Device for realizing protection switching in wavelength division multiplexing passive optical network (WDM PON), system and method therefor

A passive optical network and protection switching technology, applied in the field of optical communication, can solve problems such as service protection to be studied

Active Publication Date: 2010-03-10
ZTE CORP
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  • Abstract
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Problems solved by technology

[0005] WDM PON has entered the technical research period, but how to realize the service protection between OLT and ONU remains to be studied

Method used

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  • Device for realizing protection switching in wavelength division multiplexing passive optical network (WDM PON), system and method therefor
  • Device for realizing protection switching in wavelength division multiplexing passive optical network (WDM PON), system and method therefor
  • Device for realizing protection switching in wavelength division multiplexing passive optical network (WDM PON), system and method therefor

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Embodiment Construction

[0078] A protection switching device, system and method for a wavelength division multiplexing passive optical network WDM PON provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0079] Firstly, the structure and functions of the optical line terminal OLT for realizing protection switching in WDM PON are introduced in detail.

[0080] Such as figure 2 As shown, the specific structure of the OLT includes: the main PON service access module 201, the protection switching control module 202 and the standby PON service access module 203; wherein:

[0081] The main PON service access module 201 is used to detect the optical signal of the WDM PON service to be accessed, determine whether the communication optical fiber between the OLT and the optical network unit ONU is faulty, and notify the protection switching when a fault occurs control module 202;

[0082] The protection switching control module 202 is configured ...

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Abstract

The invention discloses a device for realizing protection switching in a WDM PON, a system and a method therefor, and the device relates to an OLT and an ONU. The device comprises a PON service access module, a protection switching control module and a standby PON service access module, wherein the PON service access module is used for detecting optical signals of accessed service and informing the protection switching control module when a communication optical fiber arranged between the OLT and the ONU has failure; the protection switching control module is used for sending protection switching notification message to the standby PON service access module so as to inform that the service is switched into the standby PON service access module from the primary PON service access module; and the standby PON service access module is used for sending the protection switching notification message to the ONU (OLT). When detecting optical fiber failure at the side of the OLT (ONU) and carrying out protection switching, the invention can inform the side of the ONU (OLT) to have the protection switching in time, thus realizing the protection for a full-service optical fiber between the OLT and the ONU and ensuring the normal transmission of the service.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a device, system and method for realizing protection switching in a wavelength division multiplexing passive optical network (WDMPON). Background technique [0002] With the rapid growth of the access network's demand for service bandwidth, the development of optical communication technology and the reduction of costs, optical fiber communication is transparent to services, long in life, almost unlimited in bandwidth carrying capacity, and can adapt to growing bandwidth and new business development needs. Due to its characteristics, it has become an important way of access layer network construction. Optical nodes are gradually moved down, and fiber to the premises (FTTP, Fiber To The Premise), Fiber To The Building (FTTB, Fiber To The Building), Fiber Fiber To The Office) and Fiber To The Home (FTTH, Fiber To The Home) have become an inevitable trend in the develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04Q11/00H04J14/02
CPCH04B1/74H04J14/0282H04J14/0297H04J14/0289
Inventor 俞杰
Owner ZTE CORP
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