Information Technology Reference
In-Depth Information
Table 5.2 (continued)
SenseWeb
GSN
e-SENSE
Urban
USN
Cobis
Policies at GW
Yes
Yes, but
simplistic
Mediator as
policy
proxy
IMS-based
No
No
No
No
Unkown
No
No
No
No
No
No
Yes
Unknown
Yes
By use of inter-
mediate
services
No
No
No
No
Disconnection
through
mobile proxy
No
No
No
No
Unknown
Yes, geo-tagging
Yes, geo-tagging
Yes
Space-time
coordinates
Yes, geo-
tagging
Unknown
Mobile proxies
for SANs
No
IMS-based for
SAN
Limited,
change of
mediator
supported
IMS-based
for SAN
Unknown
Data transformers
btw broker and
application
Yes, limited to
SQL-like
manipulation of
I/O streams sync
of data streams
Within SAN or
SE
Possible, but
not defined
Event
filtering
and
processing
in SE
Unknown
Limited through
metadata
Encryption
between
containers
Simple A&A
Mediator as
privacy
proxy
No
No
Limited, allows
expression of
QoI metadata
No
No
Quality checks
of data?
No
No
Yes, data
combination
across queries
in broker,
caching
No
No
No
No
No
No
No
No
Via mediator
No
Unknown
Static
Static
Dynamic in SE,
not
implemented
No
No
Yes, own
language
Yes
No, provides
metadata for
discovery of
virtual sensors
Yes
Yes via
registries
Resource
discovery
No
No
Data integrity
No
Yes
No
No
No
Life-cycle and
resource
management of
virtual sensor in
containers, time
service
No
No
Yes via SE
Yes,
support
tools
 
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