Expert Group 8 on Assessment of draft UNI 10607 standards on DSRC communications-

Overview of the work and results

Working for DG TREN in support ofthe Comité Télépéage

June 2005

Report of Expert Group 8 on Microwave Technologies

Context and scope of the work

Context: EFC Directive 2004/52/EC Work on the European Electronic Toll Service (EETS) definition

Expert Group 8 on microwave technologies Established by DG TREN Assess draft UNI 10607 DSRC standards to be used for the EETS 3 experts selected

Jesper Engdahl (Lead, Rapp Trans, CH) Fausto Caneschi (Lecit Consulting, IT) Bernard Lamy (Thales, FR)

Report of Expert Group 8 on Microwave Technologies

Scope of the work

Key task: assess the new draft version of UNI 10607 standards

Suitability for the EETS at 5.8 GHz: functionalities of the services provided by the

UNI 10607 suite Completeness with respect to the CEN TC278 standards suite : level of

information and technical description provided by the draft UNI 10607 suite.

to what extent the issues identified in EG1’s final report related to the Draft UNI

DSRC standards have been resolved in the revised Draft UNI DSRC standards.

also to provide guidelines on additional information and further technical work

essential to manufacturers that wish to include a “UNI DSRC compliant interface”

Not part of the assignment: No assessment has been made whether the specifications correctly reflect the OBUs

deployed in the Telepass system, i.e. no judgement has been made on the suitability of Draft UNI DSRC standards for the Telepass system.

Configuration issues Data usage and mapping ( EG 11) Backwards compatibility, i.e., verify the impact of new functionalities with the

currently deployed Telepass system

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Report of Expert Group 8 on Microwave Technologies

Overall approach

Compare the type and depth of information in the Draft UNI DSRC standards with that of the corresponding European baseline standards for DSRC and EFC. The comparison has been established layer by layer.

Verify that the identified issues by EG1 related to previous version of UNI DSRC layer 1 standard have been solved in the revised version of the standards

Completely revise Draft UNI DSRC standards in terms of completeness and coherence, from an OBU technical point of view, following the solution proposed by EG1.

On the basis of the examination of the updated UNI DSRC standards, define overall reflections and recommendations.

Report of Expert Group 8 on Microwave Technologies

Background – EG1 results and recommendations

"Dual DSRC stacks (CEN and UNI-10607) / Common EFC application" (concept 2a in EG1 final report) is the technical basis to be considered, provided:

the issues associated with the UNI DSRC specifications have been resolved and

a fair (chipset and OBU) vendor market can be ensured. Revised edition of the draft UNI 10607 standards provided as

input to EG8 after EG1 recommendations

Report of Expert Group 8 on Microwave Technologies

Technical Appraisal of the draft UNI 10607 standard(2)

Completeness & consistency - the following observations to be resolved Clarifications on Layer 7, as detailed in Annex G3:

“Responding Mode” parameter and the selection of the corresponding transmission bit rate, including consistency of associated ASN.1 definition;

Semantics of ‘opc-failure’ in ‘Result and Diagnostics’ parameters in 9.1.4 and Annex A A-Association Parameters:

- Clarification of semantics (i.e. the functional meaning) of the parameters - Clarification of Called AP Invocation Identifier (in section 9.1.2) - Clarification on “Number of Directives” service parameter functionality and semantics- Clarification on Encoding rules

Application data elements, including coding format and semantics

EFC Application Interface definition (UNI Application Service Object), as detailed in Annex G4:

Clarification of the functional description of the service primitives. More detailed semantics of the protocol message elements for the EFC use. Description of the common memory structures and their usage in the context of EFC. Description of addressing mechanisms, by referencing to memory structures. Description of dynamic (challenge – response) data integrity service primitives and

mechanism, in order to provide for multi-operator data integrity. Introduction of a bit-level informative annex detailing a complete transaction based on the

CARDME specification, which includes all aspects in a top-down description (i.e. from A-Associate invocation down to addressing the data attribute in memory).

Report of Expert Group 8 on Microwave Technologies

Recommended further steps to enable industrial implementation

1. Finalisation of the UNI DSRC requirements suite. 2. Preparation of the UNI DSRC test suite. 3. Miscellaneous actions

• ‘Opening up' the Telepass specification• Defining the dual mode OBU architecture from a software and

hardware points of view• Assessing the feasibility of a single radio modem• Creating a workplace for the Telepass implementation work for

the purpose of fostering development, product prototyping and interoperability testing, including development and operation of an interoperability testbed.

• Ownership and governance of specifications

Report of Expert Group 8 on Microwave Technologies

Overall considerations and recommendations

The review comments raised by EG1 have been addressed by UNINFO experts and the results incorporated in the reviewed revised Draft UNI DSRC standards.

The overall architecture and functional allocation of communication services across communication layers and EFC API are consistent.

Some further comments and requests for clarification have been documented.

EG8's opinion is that these corrections may be brought in the final published version of the UNI standards, and that the final check may be part of the required test suite specification work (i.e. checking for input completeness and consistency)

In order to enable an industrial implementation, test suite specifications are required. These should be designed in an European context, with the help of Italian experts. CEN and ETSI are the candidate places for such specifications.

Report of Expert Group 8 on Microwave Technologies

EC Conclusion

European Commission wants to thank all members of EG 1 and EG 8 for their work on this issue

As well as Autostrade per l’Italia and UNI for their willingness to cooperate closely with the experts nominated by the European Commission DG TREN

At the level of specifications, UNI and CEN standards provide now an equivalent level of information, which is a pre-requisite to open the market to all suppliers

Next step of this market opening will be direct cooperation between industrials and Italian operators on the design and development of UNI interfaces to be included in the EETS onboard units

RCI will be the first step towards this achievement The EC will follow the EG8 recommendations

concerning the test suite in the frame of the European Network of Certification Centers to be put in place for the EETS