<s>
Automatically	B-Protocol
Switched	I-Protocol
Optical	I-Protocol
Network	I-Protocol
(	O
ASON	B-Protocol
)	O
is	O
a	O
concept	O
for	O
the	O
evolution	O
of	O
transport	O
networks	O
which	O
allows	O
for	O
dynamic	O
policy-driven	O
control	O
of	O
an	O
optical	O
or	O
SDH	B-Protocol
network	O
based	O
on	O
signaling	O
between	O
a	O
user	O
and	O
components	O
of	O
the	O
network	O
.	O
</s>
<s>
The	O
IETF	O
defines	O
ASON	B-Protocol
as	O
an	O
alternative/supplement	O
to	O
NMS	O
based	O
connection	O
management	O
.	O
</s>
<s>
In	O
an	O
optical	O
network	O
without	O
ASON	B-Protocol
,	O
whenever	O
a	O
user	O
requires	O
more	O
bandwidth	O
,	O
there	O
is	O
a	O
request	O
for	O
a	O
new	O
connection	O
from	O
the	O
user	O
to	O
the	O
service	O
provider	O
.	O
</s>
<s>
ASON	B-Protocol
fulfills	O
some	O
of	O
the	O
requirements	O
of	O
optical	O
networks	O
such	O
as	O
:	O
</s>
<s>
(	O
These	O
requirements	O
are	O
not	O
restricted	O
to	O
optical	O
networks	O
and	O
can	O
be	O
applied	O
to	O
any	O
transport	O
network	O
,	O
including	O
SDH	B-Protocol
Networks	O
.	O
)	O
</s>
<s>
The	O
logical	O
architecture	O
of	O
an	O
ASON	B-Protocol
can	O
be	O
divided	O
into	O
three	O
planes	O
:	O
</s>
<s>
Its	O
responsibilities	O
include	O
Configuration	O
Management	O
of	O
the	O
Control	O
Plane	O
Resources	O
,	O
Routing	B-Protocol
Areas	O
,	O
Transport	O
resource	O
in	O
Control	O
Plane	O
and	O
Policy	O
.	O
</s>
<s>
The	O
Management	O
Plane	O
contains	O
the	O
Network	O
Management	O
Entity	O
which	O
is	O
connected	O
to	O
an	O
OCC	O
in	O
Control	O
Plane	O
via	O
the	O
NMI-A	O
(	O
Network	O
Management	O
Interface	O
for	O
ASON	B-Protocol
Control	O
Plane	O
)	O
and	O
to	O
one	O
of	O
the	O
switches	O
via	O
NMI-T	O
(	O
Network	O
Management	O
Interface	O
for	O
the	O
Transport	O
Network	O
)	O
.	O
</s>
<s>
The	O
traffic	O
from	O
user	O
connected	O
to	O
an	O
ASON	B-Protocol
network	O
contains	O
data	O
for	O
both	O
Transport	O
and	O
Control	O
Plane	O
.	O
</s>
<s>
While	O
ITU	O
has	O
worked	O
on	O
the	O
requirements	O
and	O
architecture	O
of	O
ASON	B-Protocol
based	O
on	O
the	O
requirements	O
on	O
its	O
members	O
,	O
it	O
is	O
explicitly	O
aiming	O
to	O
avoid	O
the	O
development	O
of	O
new	O
protocols	O
,	O
when	O
existing	O
ones	O
will	O
work	O
fine	O
.	O
</s>
<s>
Therefore	O
,	O
while	O
ITU	O
already	O
include	O
the	O
PNNI	O
protocol	O
for	O
signaling	O
in	O
the	O
Control	O
plane	O
,	O
IETF	O
has	O
been	O
developing	O
GMPLS	O
(	O
Generalized	O
MPLS	B-Protocol
)	O
as	O
a	O
second	O
option	O
protocol	O
to	O
be	O
used	O
in	O
the	O
Control	O
Plane	O
for	O
signalling	O
.	O
</s>
<s>
As	O
a	O
product	O
of	O
IETF	O
,	O
GMPLS	O
uses	O
IP	B-Protocol
to	O
communicate	O
between	O
different	O
components	O
in	O
the	O
Control	O
Plane	O
.	O
</s>
<s>
G.7717/Y.1708	O
,	O
ASTN	B-Protocol
connection	O
admission	O
control	O
.	O
</s>
