A system and method for automated, wireless short-range data collection and communications for interconnected mobile systems, such as trains includes a master control unit and a plurality of data transmission units communicating in a daisy-chain fashion along the collection of interconnected mobile systems....http://www.google.de/patents/US6668216?utm_source=gb-gplus-sharePatent US6668216 - Method, apparatus and system for wireless data collection and communication for interconnected mobile systems, such as for railways
