1 Scope
This International Standard specifies the application interface in the context of
electronic fee collection (EFC) systems using the dedicated short-range communication (DSRC).
The EFC application interface is the EFC application process interface to the DSRC application layer, as can be seen in Figure 1 below. This International Standard comprises specifications of
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— EFC attributes (i.e. EFC application information) that can also be used for other applications and/or interfaces,
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— the addressing procedures of EFCattributes and (hardware) components (e.g. ICC and MMI),
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— EFC application functions, i.e. further qualification of actions by definitions of the concerned services, assignment of associated ActionType values and content and meaning of action parameters,
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— the EFCtransaction model, which defines the common elements and steps of any EFCtransaction,
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— the behaviour of the interface so as to ensure interoperability on an EFC-DSRC application interface level.
This is an interface standard, adhering to the open systems interconnection (OSI)
philosophy (see ISO/IEC 7498‑1), and it is as such not concerned with the implementation choices to be realised
at either side of the interface.
This International Standard provides security-specific functionality as place holders
(data and functions) to enable the implementation of secure EFCtransactions. Yet the specification of the security policy (including specific security algorithms
and key management) remains at the discretion and under the control of the EFCoperator, and hence is outside the scope of this International Standard.