<s>
Proxy	B-Protocol
Mobile	I-Protocol
IPv6	I-Protocol
(	O
or	O
PMIPv6	B-Protocol
,	O
or	O
PMIP	O
)	O
is	O
a	O
network-based	O
mobility	O
management	O
protocol	O
standardized	O
by	O
IETF	O
and	O
is	O
specified	O
in	O
RFC	O
5213	O
.	O
</s>
<s>
Proxy	B-Protocol
Mobile	I-Protocol
IPv6	I-Protocol
is	O
the	O
only	O
network-based	O
mobility	O
management	O
protocol	O
standardized	O
by	O
IETF	O
.	O
</s>
<s>
Network-based	O
mobility	O
management	O
enables	O
the	O
same	O
functionality	O
as	O
Mobile	B-Protocol
IP	I-Protocol
,	O
without	O
any	O
modifications	O
to	O
the	O
host	O
's	O
TCP/IP	B-Protocol
Protocol	I-Protocol
stack	I-Protocol
.	O
</s>
<s>
With	O
PMIP	O
the	O
host	O
can	O
change	O
its	O
point-of-attachment	O
to	O
the	O
Internet	O
without	O
changing	O
its	O
IP	B-Protocol
address	I-Protocol
.	O
</s>
<s>
Contrary	O
to	O
Mobile	B-Protocol
IP	I-Protocol
approach	O
,	O
this	O
functionality	O
is	O
implemented	O
by	O
the	O
network	O
,	O
which	O
is	O
responsible	O
for	O
tracking	O
the	O
movements	O
of	O
the	O
host	O
and	O
initiating	O
the	O
required	O
mobility	O
signalling	O
on	O
its	O
behalf	O
.	O
</s>
<s>
However	O
,	O
in	O
case	O
the	O
mobility	O
involves	O
different	O
network	O
interfaces	O
,	O
the	O
host	O
needs	O
modifications	O
similar	O
to	O
Mobile	B-Protocol
IP	I-Protocol
in	O
order	O
to	O
maintain	O
the	O
same	O
IP	B-Protocol
address	I-Protocol
across	O
different	O
interfaces	O
.	O
</s>
<s>
The	O
PMIPv6	B-Protocol
architecture	O
defines	O
following	O
functional	O
entities	O
:	O
</s>
<s>
Not	O
all	O
IP	O
traffic	O
needs	O
to	O
be	O
routed	O
back	O
to	O
the	O
home	O
network	O
;	O
some	O
of	O
the	O
non-essential	O
traffic	O
which	O
does	O
not	O
require	O
IP	B-Protocol
mobility	I-Protocol
support	O
can	O
be	O
offloaded	O
at	O
the	O
access	O
edge	O
gateway	O
.	O
</s>
<s>
The	O
network	O
triggers	O
,	O
ARP	O
message	O
for	O
the	O
default-router	O
’	O
s	O
MAC	O
address	O
,	O
Gratuitous	O
ARP	O
message	O
,	O
DHCP	O
Request	O
message	O
,	O
IPv6	O
ND	O
messages	O
are	O
the	O
potential	O
triggers	O
for	O
the	O
MAG	O
to	O
initiate	O
PMIPv6	B-Protocol
signaling	O
.	O
</s>
<s>
Parameters	O
such	O
as	O
PMIPV6	B-Protocol
Domain	O
,	O
LMA	O
IP	B-Protocol
Address	I-Protocol
,	O
3GPP	O
APN	O
etc	O
..	O
,	O
are	O
present	O
in	O
the	O
profile	O
.	O
</s>
<s>
Refer	O
to	O
PMIPv6	B-Protocol
RADIUS	O
draft	O
,	O
or	O
PMIPv6	B-Protocol
Diameter	O
Interface	O
(	O
RFC	O
5779	O
)	O
.	O
</s>
<s>
PMIPv6	B-Protocol
Signaling	O
PBU/PBA	O
Messages	O
TBD	O
The	O
options	O
that	O
are	O
required	O
in	O
the	O
PBU	O
message	O
are	O
a	O
.	O
)	O
</s>
<s>
The	O
PBU	O
is	O
just	O
MIPv6	B-Protocol
BU	O
message	O
.	O
</s>
<s>
Any	O
of	O
the	O
MIPv6	B-Protocol
Open	O
source	O
implementations	O
can	O
be	O
used	O
as	O
the	O
messaging	O
library	O
after	O
adding	O
the	O
new	O
options	O
.	O
</s>
<s>
DHCPv4	O
Interactions	O
Get-IP-Address-From-LMA	O
,	O
Assign-IP-Address-To-MN	O
.	O
</s>
<s>
The	O
needed	O
interactions	O
are	O
the	O
ability	O
to	O
influence	O
the	O
DHCP	O
server	O
to	O
assign	O
an	O
IPv4	O
address	O
that	O
the	O
MAG	O
obtained	O
from	O
LMA	O
over	O
PMIPv6	B-Protocol
signaling	O
plane	O
.	O
</s>
<s>
When	O
there	O
is	O
DHCP	O
Discover	O
request	O
from	O
the	O
mobile	O
node	O
,	O
the	O
DHCP	O
server	O
should	O
trigger	O
the	O
MAG	O
and	O
the	O
MAG	O
should	O
return	O
the	O
IP	B-Protocol
address	I-Protocol
after	O
completing	O
the	O
PMIPv6	B-Protocol
signaling	O
with	O
the	O
mobile	O
node	O
's	O
LMA	O
.	O
</s>
<s>
The	O
DHCP	O
server	O
should	O
assign	O
the	O
IP	B-Protocol
address	I-Protocol
that	O
it	O
obtains	O
from	O
the	O
LMA	O
.	O
</s>
<s>
Parameters	O
:	O
Encap-Type	O
,	O
IP	O
Source	O
Address	O
,	O
IP	O
Destination	O
Address	O
Example	O
PMIPv6	B-Protocol
specifications	O
support	O
GRE	O
,	O
IP-in-IP	O
encapsulation	O
modes	O
.	O
</s>
<s>
TBD	O
The	O
MAG	O
should	O
ensure	O
any	O
IPv4	O
or	O
IPv6	O
packets	O
from	O
the	O
mobile	O
node	O
using	O
the	O
IP	B-Protocol
addresses	I-Protocol
assigned	O
by	O
the	O
LMA	O
,	O
should	O
be	O
reverse	O
tunneled	O
over	O
the	O
PMIPv6	B-Protocol
LMA	O
tunnel	O
.	O
</s>
