A method and device for synchronizing time at an onu end of an xg-pon1 system
A technology of XG-PON1 and time synchronization, which is applied in the direction of time division multiplexing system, electrical components, multiplexing communication, etc. It can solve the problems that the ONU terminal cannot accurately output 1PPS and TOD signals, and the system cannot work normally.
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[0031] The present invention will be described in detail below in conjunction with the specific embodiments and the drawings of the specification.
[0032] Such as figure 1 As shown, an ONU side time synchronization device of the XG-PON1 system is provided for the present invention, which includes a downstream data frame analysis circuit 10, a CPU processing circuit 20, a time synchronization processing circuit 30, a TOD serialization circuit 40, and a clock recovery circuit 50 and clock selection circuit 60.
[0033] The downstream data frame analysis circuit 10 and the clock recovery circuit 50 both receive the downstream data of the PON port. The output end of the downstream data frame analysis circuit 10 is connected to the input end of the CPU processing circuit 20 and the time synchronization processing circuit 30, respectively. The CPU processing circuit 20 passes time The synchronization processing circuit 30 is connected to the TOD serialization circuit 40. The output ends...
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