On-Board Message Repeater for Vehicle Consist Communications

The patent replaces the purely mechanical pneumatic brake pipe pressure reduction system with a hybrid system that uses radio frequency electromagnetic communication to transmit brake commands to remote units. This substitution allows simultaneous brake application at all units without relying on pressure propagation speed through the brake pipe, thereby increasing brake application speed while maintaining system simplicity.

The patent introduces a radio frequency communication system as an intermediary between the lead unit and remote units to transmit brake commands. This intermediary enables fast, simultaneous communication of brake application instructions to all units without relying on the slow propagation of pneumatic pressure through the brake pipe, thus resolving the contradiction between system simplicity and brake application speed.

The patent implements message repeating where each remote unit receives and retransmits the brake command message to subsequent units. This copying mechanism ensures that even if a message is obstructed or lost between two units, adjacent units can still receive and forward the message, thereby maintaining communication reliability while preserving the fast propagation speed of radio frequency communication.

The patent incorporates status reply messages that provide feedback about message reception and execution status at each remote unit. This feedback mechanism allows the lead unit to verify that brake commands were successfully transmitted and executed, enabling reliability monitoring and correction of any communication failures in obstructed environments while maintaining the speed advantage of RF communication.

The patent creates a universal communication system that combines both MU line coupling for local coordination and radio frequency communication for distant units. This multi-functional approach allows the system to handle diverse operating conditions including both directly coupled and remotely located units, as well as both clear and obstructed communication environments, thereby improving environmental adaptability while maintaining control coordination.

The patent segments the train communication system into multiple independent communication paths: MU lines for directly coupled units and radio frequency links for remote units. This segmentation allows each path to function independently based on its suitability for the specific operational condition, enabling the system to adapt to various environments while maintaining overall control coordination through the distributed architecture.