<s>
A	O
sensor	B-Device
network	I-Device
query	I-Device
processor	I-Device
(	O
SNQP	O
)	O
,	O
also	O
called	O
a	O
sensorDB	O
,	O
is	O
a	O
user-friendly	B-General_Concept
interface	B-Application
for	O
programming	B-General_Concept
and	O
running	O
applications	O
which	O
translates	O
instructions	O
from	O
declarative	B-Language
programming	I-Language
language	I-Language
with	O
high-level	O
instructions	O
to	O
low-level	O
instructions	O
understood	O
by	O
the	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
The	O
basic	O
idea	O
of	O
SNQP	O
is	O
the	O
addition	O
of	O
a	O
layer	O
modeling	O
the	O
WSN	B-Architecture
as	O
a	O
distributed	B-Operating_System
database	I-Operating_System
searchable	O
by	O
a	O
query	B-Language
language	I-Language
similar	O
to	O
SQL	B-Language
.	O
</s>
<s>
TinyDB	O
is	O
a	O
query	O
processing	O
system	O
for	O
extracting	O
information	O
from	O
a	O
network	B-Architecture
of	O
TinyOS	B-Device
sensors	B-Application
.	O
</s>
<s>
Unlike	O
existing	O
solutions	O
for	O
data	B-General_Concept
processing	I-General_Concept
in	O
TinyOS	B-Device
,	O
TinyDB	O
does	O
not	O
require	O
embedded	B-Language
C	I-Language
code	B-Application
for	O
sensors	B-Application
.	O
</s>
<s>
Instead	O
,	O
TinyDB	O
provides	O
a	O
simple	O
,	O
SQL-like	O
interface	B-Application
to	O
specify	O
the	O
data	O
desired	O
,	O
along	O
with	O
additional	O
parameters	O
,	O
as	O
the	O
rate	O
at	O
which	O
data	O
should	O
be	O
refreshed	O
—	O
much	O
like	O
a	O
traditional	O
database	O
.	O
</s>
<s>
Given	O
a	O
query	O
specifying	O
data	O
interests	O
,	O
TinyDB	O
collects	O
that	O
data	O
from	O
motes	B-Device
in	O
the	O
environment	O
,	O
filters	O
it	O
,	O
aggregates	O
it	O
,	O
and	O
routes	O
it	O
to	O
a	O
PC	B-Device
.	O
</s>
<s>
TinyDB	O
does	O
this	O
via	O
power-efficient	O
in-network	O
processing	O
algorithms	O
.	O
</s>
<s>
QLowpan	O
is	O
a	O
sensor	B-Device
network	I-Device
queries	I-Device
processor	I-Device
for	O
resource-constrained	O
sensor	O
devices	O
.	O
</s>
<s>
In	O
order	O
to	O
guarantee	O
interoperability	O
between	O
the	O
different	O
platforms	O
,	O
QLowpan	O
is	O
based	O
on	O
RPL/6LoWPAN	O
protocol	O
.	O
</s>
<s>
It	O
is	O
the	O
first	O
sensor	B-Device
network	I-Device
queries	I-Device
processor	I-Device
which	O
is	O
compatible	O
with	O
6lowpan	B-Protocol
protocol	O
.	O
</s>
