Page 556 - Unleashing the potenti al of the Internet of Things

5 Unleashing the potential of the Internet of Things

However, the following functional requirements are supported by existing management functions
[ITU-T Y.2012]:
• Security requirement:
Security management of USN applications and services including key management is
supported by the management functions.
• Accounting and charging requirement:

Different accounting and charging requirements might have to be addressed depending on
the scenarios of USN applications and services. The management functions are required to
support different accounting and charging policies according to different data transaction
types of USN applications and services.

6.3.4 End-user functions
Existing end-user functions are required to support the following functions:

• Security requirement:
Sensor data security within a sensor network is provided by the end-user functions.

7 Functional architecture of the NGN for USN applications and services
The extensions and additions of the functional entities defined in [ITU-T Y.2012] are required for
the support of USN applications and services. Based on the functions described in clause 6.3, this
clause identifies the extensions and additions of the functional entities of the NGN functional
architecture illustrated in Figures 9-2, 9-3 and 9-4 of [ITU-T Y.2012].

7.1 Transport processing functional entities

7.1.1 T-2: Access node functional entity (AN-FE)
• Application traffic control requirement:
The AN-FE supports an application traffic control requirement which requests the
management of transaction volume generated by the USN end-users.
• Differentiated QoS and data prioritization requirement:
The AN-FE supports different QoS and also supports data prioritization capabilities.

7.1.2 T-3: Edge node functional entity (EN-FE)
• Application traffic control requirement:
The EN-FE supports an application traffic control requirement which requests the
management of transaction volume generated by the USN end-users.
• Differentiated QoS and data prioritization requirement:
The EN-FE supports different QoS and also supports data prioritization capabilities.

7.1.3 T-5: Access border gateway functional entity (ABG-FE)

• Differentiated QoS and data prioritization requirement:
The ABG-FE supports different QoS and also supports data prioritization capabilities.

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