<s>
PowWow	B-Device
(	O
Power	O
Optimized	O
Hardware	O
and	O
Software	O
FrameWork	O
for	O
Wireless	O
Motes	B-Device
)	O
is	O
a	O
wireless	B-Architecture
sensor	I-Architecture
network	I-Architecture
(	O
WSN	B-Architecture
)	O
mote	B-Device
developed	O
by	O
the	O
Cairn	O
team	O
of	O
IRISA/INRIA	O
.	O
</s>
<s>
The	O
platform	O
is	O
currently	O
based	O
on	O
IEEE	B-Protocol
802.15.4	I-Protocol
standard	O
radio	O
transceiver	O
and	O
on	O
an	O
MSP430	B-Architecture
microprocessor	B-Architecture
.	O
</s>
<s>
Unlike	O
other	O
available	O
mote	B-Device
systems	O
,	O
PowWow	B-Device
offers	O
specific	O
features	O
for	O
a	O
very-high	O
energy	O
efficiency	O
:	O
</s>
<s>
the	O
MAC	B-Protocol
layer	I-Protocol
is	O
based	O
on	O
an	O
asynchronous	O
rendezvous	O
scheme	O
initiated	O
by	O
the	O
receiver	O
,	O
</s>
<s>
architectural	O
and	O
circuit	O
level	O
optimizations	O
were	O
performed	O
such	O
as	O
power	O
management	O
,	O
frequency	B-General_Concept
and	O
voltage	O
scaling	O
and	O
FPGA	B-Architecture
co-processing	O
for	O
low	O
power	O
,	O
</s>
<s>
the	O
software	B-Application
stack	I-Application
is	O
very	O
light	O
(	O
5	O
kbytes	O
)	O
uses	O
event-driven	B-Application
programming	I-Application
and	O
is	O
currently	O
derived	O
from	O
the	O
Protothread	B-Operating_System
library	O
of	O
Contiki	B-Operating_System
.	O
</s>
<s>
PowWow	B-Device
hardware	O
platform	O
is	O
composed	O
of	O
a	O
motherboard	B-Device
including	O
an	O
MSP430	B-Architecture
microcontroller	I-Architecture
and	O
of	O
other	O
daughter	O
boards	O
such	O
as	O
the	O
radio	O
transceiver	O
board	O
,	O
the	O
coprocessing	O
board	O
and	O
some	O
sensor	O
and	O
energy	O
harvester	O
boards	O
.	O
</s>
<s>
A	O
co-processing	O
board	O
can	O
be	O
added	O
to	O
the	O
motherboard	B-Device
on	O
P1	O
,	O
P2	O
connectors	O
.	O
</s>
<s>
This	O
board	O
provides	O
dynamic	O
voltage	O
scaling	O
and	O
hardware	B-General_Concept
acceleration	I-General_Concept
to	O
increase	O
the	O
energy	O
efficiency	O
of	O
the	O
network	O
.	O
</s>
<s>
PowWow	B-Device
uses	O
RICER	O
protocol	O
proposed	O
by	O
UC	O
Berkeley	O
to	O
reduce	O
the	O
time	O
spent	O
in	O
radio	O
reception	O
(	O
RX	O
)	O
mode	O
.	O
</s>
<s>
PowWow	B-Device
uses	O
a	O
simple	O
geographical	O
routing	O
protocol	O
.	O
</s>
<s>
PowWow	B-Device
software	O
distribution	O
provides	O
an	O
API	O
organized	O
into	O
protocol	O
layers	O
(	O
PHY	O
,	O
MAC	O
,	O
LINK	O
,	O
NET	O
and	O
APP	O
)	O
.	O
</s>
<s>
The	O
software	O
is	O
based	O
on	O
the	O
protothread	B-Operating_System
library	O
of	O
Contiki	B-Operating_System
,	O
which	O
provides	O
a	O
sequential	O
control	O
flow	O
without	O
complex	O
state	O
machines	O
or	O
full	O
multi-threading	O
.	O
</s>
<s>
The	O
first	O
version	O
of	O
PowWow	B-Device
were	O
released	O
July	O
2009	O
.	O
</s>
<s>
PowWow	B-Device
V1	O
includes	O
the	O
motherboard	B-Device
,	O
the	O
radio	O
board	O
and	O
the	O
software	O
.	O
</s>
<s>
PowWow	B-Device
V2	O
is	O
under	O
development	O
.	O
</s>
<s>
PowWow	B-Device
is	O
delivered	O
as	O
an	O
open-source	O
hardware	O
and	O
open	O
source	O
software	O
under	O
the	O
GPL	O
license	O
.	O
</s>
