Page 613 - 5G Basics - Core Network Aspects

Transport aspects 2

S/R-CP1 R/S-CP1
RoF OLT 1 RoF ONU 1
S/R-CP2 R/S-CP2
RoF OLT 2 S/R-CG RoF ONU 2
S/R-CP3 WN WM R/S-CP3
RoF OLT 3 RoF ONU 3
... ...
S/R-CPn R/S-CPn
RoF OLT n a) RoF ONU n

S/R-CP1
RoF OLT 1 R/S-CP1 RoF ONU 1
S/R-CP2
RoF OLT 2 S/R-CG
WN WM R/S-CP2
S/R-CP3 RoF ONU 2
RoF OLT 3
WM R/S-CP3 RoF ONU 3
...
S/R-CPn ...
RoF OLT n
R/S-CPn
b) RoF ONU n

S/R-CP1 R/S-CP1
RoF OLT 1 RoF ONU 1
S/R-CP2 R/S-CP2
RoF OLT 2 S/R-CG RoF ONU 2
WN Splitter
S/R-CP3 R/S-CP3
RoF OLT 3 RoF ONU 3
... ...
S/R-CPk R/S-CPn
RoF OLT k c) RoF ONU n

S/R-CP1 R/S-CP1
RoF OLT 1 RoF ONU 1
S/R-CP2
RoF OLT 2 S/R-CG
S/R-CP3 WN Splitter R/S-CP2
RoF OLT 3 RoF ONU 2
R/S-CP3
... WM RoF ONU 3
S/R-CPk
RoF OLT k ...
R/S-CPn
d) RoF ONU n
G Suppl.55(15)_F8-2

Figure 8-2 – Possible RoF over ODN configurations for a RoF based PON. WM:
wavelength multiplexer/demultiplexer

8.5 Possible RoF over ODN survivability and characteristics

RoF over ODN should provide 1:1 or 1 + 1 backup mechanism in case of ODN failure.
In the digital RoF case, the baseband interface could be equipped with two digital radio over fibre baseband
interface (iRoF-BB) ports. Each iRoF-BB port could be used to achieve protection on a separate ODN.
When protection is needed between ONU and OLT, a type B single and dual parenting configuration is
proposed.
Although in this Supplement the compatibility of RoF with any existing optical access system is not
discussed, the issue should be addressed in future work.

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