Subset 93

Pages: 6 (1290 mots) Publié le: 1 février 2011
QUESTION / CLARIFICATION
CO-ORDINATION BETWEEN NOTIFIED BODIES
DIRECTIVES 96/48/EC AND 2001/16/EC ON THE INTEROPERABILITY OF THE TRANS-EUROPEAN HIGH-SPEED AND
CONVENTIONAL RAILWAY SYSTEMS

QC-CCS-002
Issue: 01 Date: 20.04.2007 Page 1 of 4

TITLE DISCREPANCIES BETWEEN SUBSET-093 VERSION 2.3.0 AND O-2475 VERSION 1.0 ORIGINATOR RINA (NOTIFIED BODY 0474) SUBJECT RELATED TO HS CCS TSI & CR CCSTSI

DESCRIPTION AND BACKGROUND EXPLANATION This QC points out two aspects of the GSM-R specifications item B37 of the TSI (Subset 093 - “GSM-R Interfaces- Class 1 Requirements”) and item B5 (O_2475 - “ERTMS GSM-R QoS test Specification”). The first aspect regards the version discrepancy of the two documents: Subset-093 "GSM-R Interfaces – Class 1 Requirements" version 2.2.6 and O-2475"ERTMS/GSM-R Quality of Service - Test Specification" version 1.0 are dated respectively September 2003 and October 2003. These versions were recalled consistently by the old TSI. However, the new TSI (2006/860/EC) references in Annex A an updated version of Subset-093 (version 2.3.0, dated October 2005) while O-2475 still remains at version 1.0. Therefore, important changes made in Subset-093 regardingthe important indicators of the track-train communication quality, have not been reflected back into in the test specification (O-2475). Even though these specifications are defined “informative” by the TSI, they are the only harmonised ones available today for checking the correct operation and the availability of the radio communication. The second point regards some problems encountered duringQuality of Service tests performed on GSM-R data transmission equipment in Italian high speed lines. Trials carried out on High Speed Line Roma-Napoli have shown that the new requirement on Transmission Interference introduced in Subset 093-v2.3.0 results much more difficult to fulfil than in the previous version. The new definition could bring to consider as erroneous a normal behaviour of aMobile Terminal during Cell Handover conditions (see the Attachment for a more detailed description). SUGGESTED RESOLUTION / INTERPRETATION In relation to the first point, Item B5 of Annex A of the TSI should be updated with a new version of O-2475 (e.g. the available version 1.1), consistent with the recalled version of Subset 093. In relation to the second point, in order to avoid mistakes in thepost-processing phase, an off-line evaluation of each interference period and recovery period has to be carried out. This makes post-processing activities very slow and, therefore, the verification of the statistical performance requirements becomes quite a long/expensive process (due to quite long recording times and consequent off-line evaluations). ORGANISATION(S) REQUESTED TO RESPOND (E.G. TSIGROUP, A21C, ERA ETC.) ERA QUESTION & CLARIFICATION

QUESTION / CLARIFICATION
CO-ORDINATION BETWEEN NOTIFIED BODIES
DIRECTIVES 96/48/EC AND 2001/16/EC ON THE INTEROPERABILITY OF THE TRANS-EUROPEAN HIGH-SPEED AND
CONVENTIONAL RAILWAY SYSTEMS

QC-CCS-002
Issue: 01 Date: 20.04.2007 Page 2 of 4

DATE OF AGREEMENT AT NB RAIL PLENARY MEETING 17/10/2007 RESPONSE FROM ERA ANALYSIS
First aspect:The version discrepancy identified by NB Rail is real, but not critical for the applicability of the mandatory specifications. In fact the document O-2475 is referenced in Annex A as informative “type 2”: according to the explanation note in the TSI, “type 2” specifications give additional information, justifying the requirements in mandatory specifications and providing help for theirapplication. Second Aspect: The return of experience from the GSM-R projects being rolled out and put in service is constantly increasing: the Agency has set up with the sector representatives an agreed procedure to manage the change requests to the ERTMS specifications. The work on the specific aspect of the GSM-R Quality of Service for ETCS is under way, and it is expected to result in thorough review of...
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