US 12,134,415 B2
Communication network architecture for trains
Giovanni Iusto, Naples (IT)
Assigned to HITACHI RAIL STS S.p.A., Naples (IT)
Filed by HITACHI RAIL STS S.p.A., Naples (IT)
Filed on Apr. 29, 2021, as Appl. No. 17/244,187.
Claims priority of application No. 102020000009592 (IT), filed on Apr. 30, 2020.
Prior Publication US 2021/0339778 A1, Nov. 4, 2021
Int. Cl. B61L 15/00 (2006.01)
CPC B61L 15/0018 (2013.01) [B61L 15/0054 (2013.01); B61L 15/0072 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A communication architecture (1) of a train in which at least one central processing unit (3, Main Board) arranged in a train carriage is interconnected through a communication network (5) of the train with a plurality of peripheral processing units (6, I/O Collector Board); the communication network (5) of the train extends along the carriages that form a railway convoy; the communication network (5) of the train being able to transmit both data associated with an SIL 1 and an SIL 2 safety level and data with SIL 0 safety level;
wherein the central processing unit (3) is provided with a single board (7) which includes:
a processor (10) designed to process data associated with an SIL0 safety level;
a coprocessor (12) designed to process only data associated with an SIL1-SIL2 safety level;
an internal bus (14) built on the board (7) and configured to allow a two-way data communication between the processor (10) and the coprocessor (12);
interface means (16) designed to enable connection between said processor (10) and the communication network (5) of the train;
said coprocessor (12) being designed to be programmed in a reconfigurable manner with a software (18) that allows the validation and encoding of data coming from the processor (10) according to a safety protocol;
said coprocessor (12) also being configured to transfer the validated and encoded data to the processor (10) for the subsequent transmission on the communication network (5) of the train (5).