GSM-R performance is important for the safe integration between GSM-R and ETCS. ETCS suppliers ask for the evidence related to Subset-093 and they want to see it in the GSM-R EC Certificate. However, there is no definitive agreement on mandatory performance requirements for the network (trackside subsystem) or for the different Interoperability Constituents (EDOR, ETCS on board-EVC, RBC), nor on the way to measure their performance. In this situation, the assessment by a NoBo is not possible.
Subset-093 includes requirements between the interface of the EVC and the EDOR, and the interface between the GSM-R network and the RBC. This does not correspond with the entities that the NoBo has to assess (subsystems or ICs, as defined in the CCS TSI. Therefore, the document, as it is, is not suitable for the assessment of the trackside subsystem or for the EDOR.