Page 163 - Unleashing the potenti al of the Internet of Things

Unleashing the potential of the Internet of Things 3

Recommendation ITU-T Y.4104/F.744

Service description and requirements for ubiquitous
sensor network middleware

1 Scope
This Recommendation describes USN services and requirements for ubiquitous sensor network
(USN) middleware. This Recommendation covers:
– description of the USN services;
– description of the USN middleware;
– use cases of USN services that use USN middleware;

– functional model of USN middleware;
– requirements for USN middleware to support functions commonly required by USN
services.

2 References
The following ITU-T Recommendations and other references contain provisions which, through
reference in this text, constitute provisions of this Recommendation. At the time of publication, the
editions indicated were valid. All Recommendations and other references are subject to revision;
users of this Recommendation are therefore encouraged to investigate the possibility of applying the
most recent edition of the Recommendations and other references listed below. A list of the
currently valid ITU-T Recommendations is regularly published. The reference to a document within
this Recommendation does not give it, as a stand-alone document, the status of a Recommendation.
[ITU-T Y.2201] Recommendation ITU-T Y.2201 (2009), Requirements and capabilities for
ITU-T NGN.
[ITU-T Y.2221] Recommendation ITU-T Y.2221 (2010), Requirements for support of
ubiquitous sensor network (USN) applications and services in the NGN
environment.

3 Definitions

3.1 Terms defined elsewhere
This Recommendation uses the following terms defined elsewhere:

3.1.1 context awareness [ITU-T Y.2201]: Context awareness is a capability to determine or
influence a next action in telecommunication or process by referring to the status of relevant
entities, which form a coherent environment as a context.

NOTE – This Recommendation also uses context-aware with same meaning of context awareness.
3.1.2 sensor [ITU-T Y.2221]: An electronic device that senses a physical condition or chemical
compound and delivers an electronic signal proportional to the observed characteristic.
3.1.3 sensor network [ITU-T Y.2221]: A network comprised of inter-connected sensor nodes
exchanging sensed data by wired or wireless communication.
3.1.4 sensor node [ITU-T Y.2221]: A device consisting of sensor(s) and optional actuator(s)
with capabilities of sensed data processing and networking.

Rec. ITU-T Y.4104/F.744 (12/2009) 149