Patent ID: 9442880
Filing Date: 2016-09-13
CPC Classification: G06F,H04L

Claim Text:
1. A method for determining the topology of a serial asynchronous data bus, to which at least a first bus subscriber and a second bus subscriber are connected, which subscribers communicate via a prescribed bus access protocol that comprises defined request and response telegrams, the method comprising: sending request telegrams from the first bus subscriber and receiving the request telegrams at the second bus subscriber, sending a respective response telegram from the second bus subscriber in response to each request telegram, and receiving the response telegrams at the first bus subscriber, determining, at a first measurement site positioned on the data bus on a side of the first bus subscriber opposite the second bus subscriber, a first plurality of time differences between the reception of a particular request telegram of the first bus subscriber and the reception of a respective related response telegram of the second bus subscriber, determining, at a second measurement site positioned on the data bus on a side of the second bus subscriber opposite the first bus subscriber, a second plurality of time differences between the reception of the particular request telegram of the first bus subscriber and the reception of the respective related response telegram of the second bus subscriber, and calculating a first average response time calculating a second average response time calculating a run time delay T