US 12,113,693 B2
Communication in an industrial automation system
Jörgen Gade, Västerås (SE); Maryam Vahabi, Västerås (SE); Xiaolin Jiang, Linköping (SE); Johan Åkerberg, Västerås (SE); and Pietro Falco, Västerås (SE)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB SCHWEIZ AG, Baden (CH)
Filed on Nov. 4, 2022, as Appl. No. 18/052,837.
Claims priority of application No. 21207761 (EP), filed on Nov. 11, 2021.
Prior Publication US 2023/0144148 A1, May 11, 2023
Int. Cl. H04L 43/0882 (2022.01); H04L 43/08 (2022.01); H04L 43/0829 (2022.01); H04L 43/0852 (2022.01); H04L 43/087 (2022.01)
CPC H04L 43/0882 (2013.01) [H04L 43/08 (2013.01); H04L 43/0829 (2013.01); H04L 43/0852 (2013.01); H04L 43/087 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for improving communication between devices of an industrial automation system running automation applications, which devices comprise a first endpoint device and a second endpoint device of a communication path for a data stream through a time sensitive network and for which data stream a corresponding application has an application cycle time at which the first and second endpoint devices are to transmit data to each other, wherein the application cycle time is the time between consecutive transmitted packets of the data stream, the method comprising performing by the first endpoint device:
detecting a communication degradation of the data stream, which communication degradation is indicative of congestion in the data communication network, and
performing a congestion limiting activity from a group of congestion limiting activities, which group at least includes an activity of increasing the application cycle time of the data stream and an activity of adjusting an offset to a network clock of the time sensitive network,
wherein the first endpoint device comprises a receive buffer and the detecting of the communication degradation is performed through investigating the receive buffer.