Page 666 - Unleashing the potenti al of the Internet of Things

5 Unleashing the potential of the Internet of Things

II.2 Analysis between two architectural models

An analysis of features and detailed functions, shown in clause II.1, reveals that the ITS station
reference architecture has a structure quite similar to the functional architecture model of NGN,
although some of the terminology ("Facilities", "Transport" and "Access technologies") in the ITS
station reference architecture is used in a different way in NGN. Considering this different usage of
terminology, this appendix shows a way to harmonize the ITS station reference architecture model
into the functional architecture model of the networked vehicle over NGN, based on the analysis of
features and detailed functions. Table II.1 shows a summary of the analysis between the ITS station
reference architecture and the NGN functional architecture defined in [ITU-T Y.2012].

Table II.1 – Features and comparison between ITS station reference architecture
and NGN functional architecture

ITS station Corresponding NGN
reference functional architecture Rationale
architecture
Access Transport functions Even called "Access technologies" but this part
technologies generally represents the transport function itself. NGN
applies at "Station external IF" but not at "Station
internal IF".
Networking and Transport control functions This generally handles networking protocols such as
transport IPv6, TCP/UDP, etc., so it should correspond to
"Transport control functions".
Facilities Service control and "Facilities" is the most difficult part to map because of
service/application support the different usage of naming, but it is mainly
functions involved in "session support" and "ITS application".
Thus, this should correspond to "Service/application
support functions" in NGN.

Applications Applications This part mainly involves providing ITS applications,
so it corresponds to "Application functions" in NGN.
Management Management Mostly the same but need to consider ITS specific
requirements should be considered.
Security Security Mostly the same but need to consider ITS specific
requirements should be considered.
Based on Table II.1, a possible mapping of the ITS station reference architecture into the NGN
functional architecture can be depicted, as shown in Figure II.3.

652 Rec. ITU-T Y.4407/Y.2281 (01/2011)