October 2007
Intermediate to advanced
368 pages
10h 55m
English
Content preview from Passive Optical Networks
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2.11 SUMMARY
In summary, we have reviewed various PON architectures in this chapter.
PON has become an import access technology to offer next generation broad-
band services. It offers long-reach and high-bandwidth passive local loops using
single-mode optical fiber. There are two major ways to realize a passive distri-
bution plant: power splitting (TDM-PON) and wavelength multiplexing
(WDM-PON).
Time division multiplexing is used for multiplexing data from different ONUs
on a power-splitting PON. A ranging process is required to set up ONUs at
different transmission distances from the OLT with a common logical timing
reference, which is used in scheduling ONU transmissions. In a power-splitting
PON, the PON bandwidth is shared among ONUs. Dynamic
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