Fault-tolerant system for data transmission in a passenger aircraft
View Patent ↗A transmission system for transmitting communications data from at least one data source to a plurality of terminals via a distributor, includes terminals connected in series in a terminal chain, via an input port and an output port. The first and last terminals in the chain are directly interconnected with a shunt connection in such a way that the communications data in the chain of terminals is transmitted from terminal to terminal, between the first and the last terminals of the chain if all the terminals are interconnected, and, if the connection between the terminals in the terminal chain is interrupted, the communications data from the first terminal of the chain of terminals is transmitted in the terminal chain up to the inactive terminal and the communications data from the last terminal is transmitted in the terminal chain up to the inactive terminal.
1. A transmission system for transmitting communication data from at least one data source to several terminals in a passenger aircraft by way of at least one distributor that is connected to the data source,
wherein each terminal by way of an input port and an output port is daisy chained to at least one terminal chain;
the first and the last terminal in each terminal chain by means of a shunt connection are directly interconnected so that the communication data between the first terminal and the last terminal in the terminal chain is transmitted from terminal to terminal in the chain when all the terminals are interconnected; and
the communication data from the first terminal in the terminal chain up to an inactive terminal and from the last terminal in the terminal chain up to the inactive terminal is transmitted when the connection between the terminals in the terminal chain is interrupted;
wherein the distributors of several terminal chains are interconnected by way of a distributor connection so that if the supply to one of the several terminal chains fails, by way of a distributor the respective chain is supplied by way of an adjacent distributor.
2. The transmission system according to claim 1 , in which each terminal and/or each distributor comprises a bypass switch, through which in the case of failure of the terminal the input port is connected to the output port.
3. The transmission system according to claim 1 , in which each of the area distributors comprises a bidirectional port, by way of which the zone distributor is connected to the corresponding bidirectional port of the area distributor of an adjacent terminal chain.