<s>
ExpEther	B-Protocol
is	O
a	O
System	O
Hardware	O
Virtualization	O
Technology	O
that	O
expands	O
standard	O
PCI	O
Express	O
beyond	O
1km	O
having	O
thousands	O
of	O
roots	O
and	O
endpoint	O
devices	O
together	O
on	O
a	O
single	O
network	O
connected	O
through	O
the	O
standard	O
Ethernet	O
.	O
</s>
<s>
ExpEther	B-Protocol
enables	O
a	O
unique	O
"	O
PCI	O
Express	O
switch	O
over	O
Ethernet	O
"	O
architecture	O
that	O
distributes	O
functional	O
blocks	O
of	O
a	O
PCI	O
Express	O
switch	O
over	O
Ethernet	O
,	O
maintaining	O
a	O
logical	O
equivalency	O
with	O
the	O
standard	O
PCI	O
Express	O
switch	O
.	O
</s>
<s>
By	O
leveraging	O
Ethernet	O
connectivity	O
,	O
ExpEther	B-Protocol
can	O
expand	O
the	O
number	O
of	O
port-count	O
to	O
more	O
than	O
1000	O
,	O
and	O
the	O
working	O
distances	O
to	O
over	O
1000m	O
.	O
</s>
<s>
Ethernet	O
is	O
transparent	O
to	O
the	O
OSes	O
,	O
driver	O
,	O
software	O
,	O
thus	O
ExpEther	B-Protocol
can	O
work	O
with	O
enormous	O
commodity	O
standard	O
OS	O
,	O
drivers	O
,	O
PCIe	O
devices	O
,	O
Ethernet	O
switches	O
without	O
any	O
modification	O
.	O
</s>
<s>
From	O
the	O
data	O
communication	O
point	O
of	O
view	O
,	O
ExpEther	B-Protocol
realizes	O
reliable	O
communication	O
over	O
standard	O
Ethernet	O
with	O
original	O
congestion	O
control	O
and	O
multi-path	O
communication	O
mechanism	O
.	O
</s>
<s>
Then	O
DMA	O
(	O
Direct	B-General_Concept
Memory	I-General_Concept
Access	I-General_Concept
)	O
can	O
be	O
directly	O
executed	O
over	O
Ethernet	O
.	O
</s>
<s>
It	O
can	O
transfer	O
a	O
large	O
amount	O
of	O
data	O
with	O
low	O
latency	O
and	O
high	O
throughput	O
without	O
software	O
stacks	O
of	O
TCP/IP	B-Protocol
.	O
</s>
<s>
ExpEther	B-Protocol
was	O
firstly	O
announced	O
in	O
December	O
2006	O
by	O
a	O
research	O
and	O
development	O
group	O
of	O
NEC	O
as	O
a	O
computer	O
scale-up	O
technology	O
that	O
virtualizes	O
PCI	O
Express	O
over	O
Ethernet	O
.	O
</s>
<s>
In	O
November	O
2008	O
,	O
the	O
has	O
been	O
established	O
aiming	O
at	O
promotional	O
activities	O
to	O
expand	O
the	O
market	O
of	O
ExpEther	B-Protocol
for	O
both	O
academic	O
and	O
industrial	O
area	O
,	O
bringing	O
researchers	O
,	O
developers	O
,	O
resellers	O
of	O
computing	O
system	O
software	O
,	O
device	O
,	O
chip	O
together	O
.	O
</s>
<s>
In	O
December	O
2008	O
,	O
one	O
of	O
the	O
implementation	O
of	O
the	O
ExpEther	B-Protocol
technology	O
as	O
a	O
PCI	O
Add-In	O
card	O
was	O
passed	O
the	O
PCI-SIG	O
(	O
PCI	O
Express	O
standardizing	O
body	O
)	O
compliant	O
test	O
and	O
interoperability	O
tests	O
,	O
and	O
then	O
posted	O
on	O
the	O
integrator	O
’s	O
list	O
.	O
</s>
<s>
In	O
2009	O
,	O
Nethra	O
Imaging	O
announced	O
an	O
ASIC	O
development	O
of	O
Expether	B-Protocol
.	O
</s>
<s>
In	O
2009	O
,	O
the	O
QCN	O
method	O
proposed	O
by	O
Professor	O
Balaji	O
Prabhakar	O
of	O
Stanford	O
University	O
for	O
standardization	O
of	O
IEEE	O
802.1Qau	O
was	O
proved	O
by	O
the	O
experiment	O
using	O
the	O
ExpEther	B-Protocol
card	O
.	O
</s>
<s>
In	O
2009	O
,	O
interview	O
articles	O
on	O
ExpEther	B-Protocol
were	O
published	O
in	O
Nkkei	O
PC	O
(	O
1/21/2009	O
p17	O
)	O
and	O
Nikkei	O
Network	O
(	O
Jan.2009	O
p49	O
)	O
.	O
</s>
<s>
"	O
ExpEther	B-Protocol
"	O
is	O
listed	O
in	O
the	O
Technical	O
Terms	O
selected	O
by	O
ITPro	O
.	O
</s>
<s>
In	O
May	O
2012	O
,	O
an	O
ExpEther	B-Protocol
Bridge	O
chip	O
was	O
released	O
with	O
the	O
following	O
commercial	O
products	O
included	O
the	O
chip	O
.	O
</s>
<s>
・ExpEther	O
I/O	O
Expansion	O
Box	O
(	O
1G	O
)	O
(	O
PCI	O
Express	O
expansion	O
box	O
connected	O
through	O
ExpEther	B-Protocol
)	O
.	O
</s>
<s>
In	O
2013	O
,	O
ExpEther	B-Protocol
's	O
end-to-end	O
delay	O
measurement	O
function	O
was	O
provided	O
as	O
a	O
network	O
monitoring	O
tool	O
in	O
SHOWNET	O
of	O
Interop	O
Tokyo	O
2013	O
.	O
</s>
<s>
In	O
October	O
2013	O
,	O
"	O
ExpEther	B-Protocol
Board	O
"	O
and	O
"	O
ExpEther	B-Protocol
I/O	O
Expansion	O
Box	O
"	O
with	O
the	O
transmission	O
performance	O
enhanced	O
from	O
2x1	O
GE	O
to	O
2x10	O
GE	O
,	O
were	O
released	O
.	O
</s>
<s>
In	O
December	O
2014	O
,	O
"	O
ExpEther	B-Protocol
I/O	O
Expansion	O
Box	O
"	O
with	O
a	O
new	O
function	O
,	O
sharing	O
PCI	O
Express	O
SR-IOV	O
compliant	O
device	O
among	O
multi	O
host	O
over	O
Ethernet	O
,	O
was	O
released	O
.	O
</s>
<s>
In	O
February	O
2016	O
,	O
"	O
ExpEther	B-Protocol
Board	O
"	O
and	O
"	O
ExpEther	B-Protocol
I/O	O
Expansion	O
Box	O
"	O
with	O
transmission	O
performance	O
enhanced	O
to	O
2x	O
40GE	O
were	O
released	O
in	O
USA	O
.	O
</s>
<s>
A	O
few	O
USA	O
system	O
vendors	O
released	O
ExpEther	B-Protocol
products	O
as	O
OEM	O
.	O
</s>
<s>
NEC	O
and	O
IBM	O
are	O
collaborating	O
for	O
developing	O
a	O
Service	O
Acceleration	O
Platform	O
for	O
Power	O
Systems	O
with	O
ExpEther	B-Protocol
.	O
</s>
<s>
ExpEther	B-Protocol
Bridge	O
chip	O
has	O
been	O
upgraded	O
by	O
only	O
replacing	O
the	O
PHY	O
layer	O
along	O
with	O
the	O
PCI	O
Express	O
and	O
Ethernet	O
standard	O
.	O
</s>
