Passive optical network data collection method based on secondary sampling
A passive optical network and data acquisition technology, applied in the field of communication, can solve the problems of difficult management and maintenance, low timing accuracy, and high networking cost, and achieve the effects of easy expansion, small acquisition error, and high time transmission accuracy.
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[0025] Because generally speaking the clock that the ONU end carries out AD (AnalogtoDigital) conversion is the respective local clock of ONU, so each ONU end obtains at different times by the sampling data that AD converts, and is asynchronous, therefore, in the present invention , in order to get the sampling data at the same time at the ONU side, we send the time information to each ONU side through the OLT, and the ONU side uses the unified time information to get the second sampling time, so that the ONU side gets the second sampling time. Based on the time information sent by the OLT, the synchronization of each ONU is realized. Specifically, as figure 1 Shown is a schematic flow chart of the PON data acquisition method based on subsampling in the present invention, including the following steps:
[0026] The S1OLT periodically generates synchronization time information according to the first local clock counter. Specifically, here the OLT uses the first local clock co...
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