<s>
Wavelength	B-Protocol
switched	I-Protocol
optical	I-Protocol
network	I-Protocol
(	O
WSON	O
)	O
is	O
a	O
type	O
of	O
telecommunications	O
network	O
.	O
</s>
<s>
The	O
data	O
plane	O
comprises	O
wavelength-division	B-Architecture
multiplexing	I-Architecture
(	O
WDM	O
)	O
fiber	O
links	O
connecting	O
optical	B-Protocol
cross-connect	I-Protocol
(	O
OXCs	B-Protocol
)	O
through	O
a	O
comb	O
of	O
several	O
tens	O
of	O
wavelength	O
channels	O
,	O
with	O
typical	O
data	O
rates	O
of	O
10	O
or	O
40	O
Gbit/s	O
.	O
</s>
<s>
Optical	O
end-to-end	O
connections	O
(	O
i.e.	O
,	O
lightpaths	B-Protocol
)	O
are	O
established	O
in	O
the	O
optical	O
domain	O
and	O
switched	O
by	O
OXCs	B-Protocol
at	O
the	O
wavelength	O
granularity	O
.	O
</s>
<s>
The	O
dynamic	O
provisioning	O
and	O
maintenance	O
of	O
lightpaths	B-Protocol
is	O
managed	O
by	O
the	O
control	O
plane	O
.	O
</s>
