Page 564 - Unleashing the potenti al of the Internet of Things

5 Unleashing the potential of the Internet of Things

Appendix II

USN middleware functions provided by NGN

(This appendix does not form an integral part of this Recommendation.)

[b-ITU-T F.744] describes USN middleware as follows:

• USN middleware is an intermediate entity which provides functions commonly required by
different types of USN applications and services. USN middleware receives requests from
USN applications and delivers those requests to appropriate sensor networks. Similarly,
USN middleware receives sensed data or processed data from sensor networks and delivers
them to appropriate USN applications. USN middleware can provide information
processing functions such as query processing, context-aware processing, event processing,
sensor network monitoring and so on.

NOTE – Detailed descriptions and requirements related to USN middleware are given in [b-ITU-T F.744].

From the description above, it is understood that USN middleware provides accessibility to sensor
networks and data between sensor networks and USN applications and services. Also, USN
middleware encompasses information processing functions which may be commonly required by
various types of USN applications and services.

As described in Appendix I, NGN may be regarded as an intermediate network providing
connectivity, data delivery and management. From these facts, USN middleware functions can be
implemented by NGN functions.

Figure II.1 depicts the functional model of USN middleware given in [b-ITU-T F.744]. NGN
functions may provide basic functions and advanced functions of USN middleware in each stratum
of NGN.

However, this Recommendation does not intend to clarify NGN functional entities for providing
USN middleware functions. This is out of scope of this Recommendation.

550 Rec. ITU-T Y.4403/Y.2026 (07/2012)