PRE-DRIVE C2X Deliverable D0.3 Final report_20100929.pdf

Final Report PRE-DRIVE C2X 29.9.2010
Subsequently the reference protocol stack has been defined (see Figure 15). This
protocol stack has been the basis for the system architecture definition. The
reference protocol stack shown in Figure 15 basically follows the ISO/OSI reference
model and defines four horizontal protocol layers:
ITS Access Technologies cover various communication media and related
protocols for the physical and data link layers.
ITS Network and Transport comprise protocols for data delivery among ITS
Stations and from ITS Stations to other network nodes, such as in the Internet.
ITS Facilities are a collection of functions to support applications for various
tasks.
ITS Applications refer to the different applications and use cases.
Apart from the horizontal layers, the reference protocol stack in Figure 15 introduces
two vertical layers that flank the horizontal stack:
ITS Management is responsible for configuration of an ITS Station and for
cross-layer information exchange among the different layers.
ITS Security provides security and privacy services, including secure message
formats at different layers of the communication stack, management of identities
and security credentials, and aspects for secure platforms.
Among the layers of the ITS Station protocol stack, well-defined interfaces are
introduced. All components of the protocol stack are defined in detail in the
deliverables mentioned above.
Figure 15: Reference Protocol Stack of an ITS Station
In addition, the system architecture description was concerned with the vehicle-tobusiness
communication view. In order to establish a flexible interconnection of
vehicles and backend systems a modular architecture was designed that applies the
two complementary architectural patterns SOA and EDA. Hence, the two entities to
be connected – vehicles on the one hand and backend systems on the other –
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Final Report