October 2007
Intermediate to advanced
368 pages
10h 55m
English
Content preview from Passive Optical Networks
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8. The OLT measures the RTD according to the time that signals for delay
measurement were received. Furthermore, after confirming that the combin-
ation of the serial number and ONU-ID is correct, it notifies the Equalization
Delay (¼ Teqd RTD) to the ONU (Ranging_time message). Here, Teqd is
the constant number and the maximum RTD value setting in the PON. For
instance, in the case of 20 km maximum RTD, Teqd is 200 msec.
9. The ONU memorizes the Equalization Delay it receives and delays the subse-
quent upstream transmission timing by this value.
Through this process, all ranged ONU become equivalent with an RTD of Teqd
(¼ original RTD þ Equalization ...
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