Page 531 - Unleashing the potenti al of the Internet of Things

Unleashing the potential of the Internet of Things 5

Even when applications have access to multiple USN middleware entities, the applications must
search, collect, analyse and process the sensed data themselves.
These limitations can be overcome by providing a unified access method for USN resources and
sensed data/semantic data via heterogeneous USN middleware.

Figure 6-1 shows the traditional USN service framework and the open USN service framework.

Open USN
Sensor USN Sensor USN
resource middleware Application resource middleware service Application
platform

…
…
…

Traditional USN service framework … … Open USN service framework …

Figure 6-1 – Traditional USN service framework and open USN service framework

In the traditional USN service framework, each application needs to know how to access
heterogeneous USN middleware and which USN resources should be accessed. In the open USN
service framework, each application does not need to know how to access heterogeneous USN
middleware nor which USN resources should be accessed.
Figure 6-2 shows heterogeneous USN middleware access provided by the open USN service
platform.

Open USN
Sensor USN
service
resource middleware platform Application
3 Sensed data
collection

2 Sensed data request
4 Sensed data reply

2 1 Service request
3
4 5 Service response

2

3 4

Figure 6-2 – Heterogeneous USN middleware access through the open USN service platform

Rec. ITU-T Y.4402/F.747.4 (12/2013) 517