06501376 is referenced by 34 patents and cites 6 patents.

A method and apparatus for data exchange between a towing vehicle and an attached trailer uses radio contact via transmission/receiving modules contained in the towing vehicle and in the trailer. To recognize that the towing vehicle and the trailer are connected, the transmission/receiving module of the towing vehicle transmits an identification signal, and at the same time, changes the electrical status of a connection line between the towing vehicle and the trailer. If the transmission/receiving module located in the trailer recognizes the change in the electrical status of the connection line simultaneously with receiving the transmitted identification signal, the identification signal is stored within the trailer. In subsequent communications between the towing vehicle and the trailer, the identification signal is always transmitted before the message. As such, only the attached trailer, with the appropriate stored identification signal, can communicate with its towing vehicle. Moreover, the same technique can be used for multiple trailers attached to the same towing vehicle.

Title
Method and apparatus for data exchange between towing vehicle and trailer
Application Number
9/922625
Publication Number
6501376 (B2)
Application Date
August 6, 2001
Publication Date
December 31, 2002
Inventor
Arne Michaelsen
Hannover
US
Thomas Dieckmann
Pattensen
US
Agent
Proskauer Rose
US
Assignee
WABCO & Co OHG
US
IPC
B60Q 1/44
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