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Unleashing the potential of the Internet of Things 5

Appendix I

Analysis of service requirements and network capabilities
defined in Recommendation ITU-T Y.2221

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

I.1 Requirements for extensions to NGN capabilities
[ITU-T Y.2221] defines the following requirements to be supported by extended NGN capabilities.

Requirements Explanation

Network management • It is required to manage IP-based sensor networks including
the case of a single node directly connected to NGN.
• It is required to manage non-IP-based sensor networks.
• It is required to support configuration and reconfiguration of
sensor networks for assurance of connectivity and lifetime
management.
Profile management for service • It is recommended to use a standard set of USN service
registration and discovery profiles to register and discover USN services.
NOTE – [ITU-T Y.2221] specifies that the service profile for
service registration and discovery requires the extension of
NGN capabilities. However, [ITU-T Y.2012] defines that the
ASF&SSF, especially the application support functional entity
(AS-FE), provides generic application server functions such as
service selection and service discovery.
Therefore, a service profile requirement can be supported by
existing NGN capabilities.
Profile management: Device profile • It is optional to use device profiles containing sensor network
related information.
Open service environment: Service • It is required to support at least one USN service description
registration and discovery language and its associated execution framework.
• It is recommended to register and discover USN services
based on a standard set of USN service profiles.
• Registration and discovery of sensor network devices may be
supported.
• Context-awareness can be optionally supported in service
discovery for USN applications and services.
NOTE – [ITU-T Y.2221] specifies that service registration and
discovery using the service profile under OSE require the
extension of NGN capabilities. However, [ITU-T Y.2012]
defines that the ASF&SSF, especially the application support
functional entity (AS-FE), provides generic application server
functions such as service selection and service discovery.
Therefore, OSE service registration and discovery requirement
can be supported by the existing NGN capability (i.e.,
ASF&SSF) instead of OSE.

Rec. ITU-T Y.4403/Y.2026 (07/2012) 545