US 12,328,183 B2
Method for avoiding function disablements for intelligent electronic units
Andrej Görbing, Berlin (DE); Ji Chen, Nanjing (CN); Stefan Flemming, Rosstal-Buchschwabach (DE); Igor Kogan, Berlin (DE); and Oliver Lindner, Finowfurt (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Filed by Siemens Aktiengesellschaft, Munich (DE)
Filed on Aug. 7, 2024, as Appl. No. 18/796,558.
Claims priority of application No. 23190098.6 (EP), filed on Aug. 7, 2023.
Prior Publication US 2025/0055586 A1, Feb. 13, 2025
Int. Cl. H04J 3/06 (2006.01); H04W 56/00 (2009.01); H04W 84/12 (2009.01)
CPC H04J 3/0641 (2013.01) [H04J 3/0667 (2013.01); H04W 56/0015 (2013.01); H04W 84/12 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for avoiding function disablements of intelligent electronic units (IEDs) that are connected to one another as part of a local network and via the local area network, the local area network having at least two timing units, the method comprising:
assuming, by one of the timing units, an active grandmaster role as a synchronization source, while all other timing units remain in a slave state and synchronize with the one timing unit being the grandmaster timing unit having the active grandmaster role;
when one of the other timing units changes from the slave state to the role of the grandmaster timing unit, notifying all IEDs in the local network via the local network, using a pre-synchronization message stating whether the presently active grandmaster timing unit was synchronized and, if applicable, with which previously active grandmaster timing unit the presently active grandmaster timing unit was synchronized, in order to avoid a function disablement of the IEDs that process data streams whose samples have been acquired in sync with the previously active grandmaster timing unit.