Method for effectively reducing GPON ONU burst time
A technology of time and light emission, which is applied in multiplexing system selection devices, electrical components, selection devices, etc., can solve the problems of poor performance adaptability, low adaptability, shortening GPONONU burst time, etc. To achieve the effect of expanding the scope, reducing the requirements of relevant indicators, and reducing costs
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[0020] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.
[0021] The physical layer overhead (Tplo) time is used to implement five physical processes in PON, which are: laser on / off time, timing drift tolerance, power level recovery, clock recovery, burst delimitation start. The exact physical layer timing allocated to these functions is determined partly by constraints and partly by implementation opportunities.
[0022] Tplo can be divided into three parts according to the requirements of ONU data mode. In simple terms, these times can be divided into guard time (Tg), lead time (Tp) and demarcation time (Td). During Tg, the ONU transmits no more than the nominal "0" power level. In Tp, ONU sends a preamble with the maximum transmission power to realize fast power control and clock recovery fun...
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