Optical line terminal and optical link switching method

A technology of optical line terminal and optical link, which is applied in the direction of electromagnetic wave transmission system, electrical components, transmission system, etc., to achieve the effects of improving stability, reducing ONU disconnection, and reducing service recovery time

Inactive Publication Date: 2018-01-05
ZTE CORP
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[0006] This article provides an optical line terminal and an optical link switching method, which can solve the problem o

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  • Optical line terminal and optical link switching method
  • Optical line terminal and optical link switching method
  • Optical line terminal and optical link switching method

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[0038] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other arbitrarily if there is no conflict.

[0039] The embodiment of the present invention provides an optical link switching method, which can solve the problem of defects in optical link switching in related technologies, and improve the speed and stability of optical link switching. The method is like figure 1 As shown, it mainly includes the following steps:

[0040] Step 100: The first PON port of the OLT (also referred to as the active PON port) receives and stores the ranging information of the ONU in the backup optical link;

[0041] Optionally, the primary PON port of the OLT may receive the ranging information of t...

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Abstract

The invention discloses an optical line terminal and an optical link switching method and relates to the technology of a mobile communication passive optical network. The method provided by the invention comprises the steps that a first passive optical network PON port of the optical line terminal OLT obtains distance measurement information of optical network units ONUs in a backup optical link and stores the obtained distance measurement information of the ONUs in the backup optical link; and when an optical link is switched, a second PON port of the OLT broadcasts switching commands to theONUs in the original backup optical link and carries out distance remeasurement on the ONUs which do not store the distance measurement information, in the original backup optical link. The inventionalso discloses the optical line terminal. According to the technical scheme provided by the invention, in a scene that partial ONUs obtain the distance measurement information of the backup link, thebusiness switching stability of all ONUs can be effectively improved, and phenomena that the ONUs are offline in a switching process can be reduced. For the ONUs obtaining the distance measurement information, the business recovery time can be effectively reduced.

Description

technical field [0001] The invention relates to passive optical network technology for mobile communication, in particular to an optical line terminal and an optical link switching method. Background technique [0002] In the current GPON (gigabit passive optical network) (passive optical network PON, Passive Optical Networks)), XGPON (10 gigabit passive optical network), TWDM-PON (based on time division and wavelength division multiplexing passive optical network ) access system, the optical link protection system can switch the services carried by the active link to the backup optical link when the active optical link fails or needs to be operated and maintained, thereby improving the reliability of the access system . At this time, the stability of optical link switching and the speed of service switching will directly affect the service recovery time after link switching. [0003] At present, in order to realize the fast switching of the optical link, there are mainly ...

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Application Information

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IPC IPC(8): H04B10/038
Inventor 欧阳海明张丹丹
Owner ZTE CORP
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