原始名称记载: Siemens Aktiengesellschaft

A method for computer-implemented tracking of production history of a continuous web is provided, which is-processed in a production system, including a sub-system applied to perform specific operation(s). The web is transported along a curved given path through the production system by winding/unwinding from/onto a coil. The following are performed:

A radio locating system in which a position of a transponder is determined via base stations of the radio locating system based on radio signal receiving time differences or radio signal propagation times, wherein the transponder is arranged at a selected place on an object to be located, is equipped with a communication module for a wireless communication system and is operated as a base station or master station of the wireless communication system, where a display unit, which is equipped with a communication module and is separate from the transponder, connects to the transponder, the display unit being a subscriber or slave station of the wireless communication system, where the transponder transmits to the display unit position-related information and object-related data sent from the base stations of the radio locating system, and where the display unit displays the transmitted position-related information and object-related data in a continuously updated manner.

Teachings herein include communication methods for a redundant communication system including two sending ends, two receiving ends, and a data source. An example includes: receiving a first copy of a data packet at the first end and receiving a second copy at the second end from the data source, wherein the first has a high priority label and the second has a low; sending the first copy from the first end to the first receiving end; retaining the second copy at the second end; receiving a confirmation message from the first receiving end at the first sending end and, in response, sending a success message to the second sending end and discarding the second copy; if the first sending end does not receive the confirmation message within a given time period, sending a failure message to the second sending end and, in response, sending the second copy to the second receiving end.