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5 Unleashing the potential of the Internet of Things

(1) The Application requests the sensed data from the open USN service platform through the
Application support FE.
(2) The Application support FE sends a request message to the Semantic query FE.

(3) The Semantic query FE requests from the Resource management FE the URIs of USN
resources that can be used for performing queries that will provide the necessary
information to satisfy the request from the Application.

(4) The Resource management FE sends this request message to the Semantic USN repository
FE.

(5) The Resource management FE receives the URIs of corresponding USN resources from the
Semantic USN repository FE.
(6) The Resource management FE returns the URIs of corresponding USN resources to the
Semantic query FE.
(7) The Semantic query FE queries via the USN middleware the sensed data of the
corresponding USN resources using the returned URIs.
(8) The Semantic query FE receives the sensed data from corresponding USN resources via the
USN middleware.

(9) The Semantic query FE sends the sensed data to the Application support FE.
(10) The Application support FE sends the sensed data to the Application.

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