Synchronization to adjacent wireless networks using single radio

摘要

A train communication system is provided for enabling communications between wayside hubs and trains operating on a track. Each wayside hub includes a block processor and at least one hub radio, with the block processor and hub radio connected via a first network. The wayside hubs are interconnected through a second network. Each train includes a train radio connected to a train control system. The block processor transmits information to the train control systems via the hub radio. If a hub includes more than one hub radio, one is selected to act as a master hub to coordinate reception and transmission of messages between the block processor and the train radios within radio range of the hub radios. Synchronization information is exchanged between an upcoming hub and a current hub for a train upon determination that the train is approaching a boundary between the hubs.