From an autonomous radio link between the 2 TUs used for FP7 MARATHON project demonstrators and GSM-R Radio link between the 2 TUs for FFL4E demonstrator 540m train homogenously loaded, M2O has gone further:
An alternative radio communication solution, completing GSM-R, based on LTE/4G -Long Term Evolution (4G-Wireless Network)- using VPN and a safety layer on the protocols of communication with a larger capacity and a shorter latency time, enabling to envisage configurations up to TUs for a Distributed Power System.
A list of possible train solutions with two up to four TUs (differently located along the train), according to different radio technologies, train length, hauled mass and payload distribution (homogeneous and not homogeneous). These trains are at least safe as currently running trains, from a statistic point of view.
The definition of a list of safety requirements for such trains to be fulfilled by technical characteristics of the equipment involved or by operational processes. The identification of hazardous conditions has led to analysing the safety of the consist when radio connection works properly or not. A list of mitigations in case some requirements could not be fulfilled directly by the equipment in place is given, as well.
A safety case for the experimental test campaign of FR8RAIL II Project (February 2021).
An assessment of the safety case, with the limits of available data, has been made by M2O Specialists (TUV). The results of the assessment performed by M2O will support the overall safety demonstration of the DPS train by the Partners of FR8RAIL II having the safety data of the TUs and DBCU.
Results of M2O have allowed the FR8RAIL II Project to put in service an extensive test campaign (February 2021) of a train equipped with three traction units, working together or with one behaving as a wagon: in this way, a multiplicity of solutions are tested considering a proper radio communication or its interruption. The train is operated in Long Locomotive braking regime and Goods braking regime. These tests will allow the implementation of DPS solution in trains with a remote TU, in a short term, since these trains already exist and DPS provides better operational flexibility and an increase of the hauled mass.
The implementation possibilities of different types of train consists are considered for a roadmap suggested to the authorities to set up, if necessary, incentives to accelerate the market uptake to develop a modal shift and increase the competitiveness and the sustainability.
The team led by University of Rome Tor Vergata as coordinator and performing TrainDy simulations , Newopera for technical coordination and operational analyses, Funkwerk for the Radio communication architecture and solutions, Nier Ingeneria for the safety analyses, UIC for its knowledge on the FRMCS/5G development and TUV Sud as independent assessor of the safety analyses has been fully dedicated to support their FR8RAIL II Partners to make a success of the test campaign which first results confirm the accuracy and the validity of the results achieved by M2O.