Method for improving optical link protection switching stability of ONU (optical network unit)
A protection switching and stability technology, applied in the field of Ethernet passive optical network, can solve the problem of inconsistent PON port activation status and registration status
Active Publication Date: 2015-12-02
WUHAN YANGTZE OPTICAL TECH
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[0003] The technical problem to be solved by the present invention is to provide a method for detecting and recovering the inconsistency between the activation state and the registration state of the existing PON port to improve the stability of ONU optical link protection switching
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[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0022] Such as figure 1 Shown, the flow chart of the method for promoting ONU optical link protection switching stability described in the present invention, this method comprises:
[0023] Step S1: start the timer, regularly query the activation state (ACTIVE state) and registration state (REG state) of the two PON ports of the ONU;
[0024] Step S2: Determine whether the activation state of the PON port is consistent with the registration state:
[0025] If consistent, return to step S1;
[0026] If inconsistent, perform step S3: start the counter to count, and check whether the inconsistency ...
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The invention discloses a method for improving the optical link protection switching stability of an ONU (optical network unit). The method is characterized by comprising the steps of S1, querying the activation state of the registration state of two PON (passive optical network) ports of the ONU in a timing mode; S2, judging whether a circumstance that the activation state and the registration state of a certain PON port are inconsistent exists or not, returning back to execute the step S1 if the activation and the registration state of each PON port are consistent, and executing a step S3 if the activation state and the registration state of a certain PON port are inconsistent; S3, starting a counter to count, and checking whether the inconsistency phenomenon disappears or not before time-out of the counter, and executing a step S4 if the inconsistency phenomenon disappears before time-out of the counter; S4, resetting the counter, and repeating the steps S1-S3, and executing a step S5 if the inconsistency phenomenon does not disappear before time-out of the counter; and S5, resetting the state of the ONU. According to the method disclosed by the invention, the state of the ONU is reset when the circumstance that the activation state and the registration state are inconsistent cannot disappear within a specified period of time, thereby avoiding lasting of a phenomenon that the ONU is abnormal in optical link switching because of inconsistency of the ONU.
Description
technical field [0001] The invention relates to the field of Ethernet passive optical network (EPON), in particular to a method for improving the stability of ONU optical link protection switching. Background technique [0002] EPON (Ethernet Passive Optical Network) system is composed of three parts: OLT (Optical Line Terminal), ODN (Optical Distribution Network) and ONU (Optical Network Unit). In order to improve the reliability of EPON services, ONU can support optical link protection switching function. The optical link protection switching process of the ONU is triggered by the PONLOS state. The PONLOS signal is transmitted to the PON chip by the optical module. It is possible that the activation state of the PON is INACTIVE but the registration state is REG. In order to avoid this problem, the ONU needs to regularly check whether the activation status and registration status of the two PON ports of the ONU are consistent. If there is any inconsistency, the inconsiste...
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IPC IPC(8): H04Q11/00
Inventor 朱梅卢方增张宇杜军
Owner WUHAN YANGTZE OPTICAL TECH