US 12,328,378 B2
Synchronous control apparatus, synchronous imaging apparatus, synchronous control method, and storage medium
Satoru Tsuboi, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Aug. 28, 2023, as Appl. No. 18/457,256.
Claims priority of application No. 2022-137746 (JP), filed on Aug. 31, 2022.
Prior Publication US 2024/0072990 A1, Feb. 29, 2024
Int. Cl. H04L 7/00 (2006.01); H03L 7/081 (2006.01)
CPC H04L 7/0008 (2013.01) [H03L 7/0816 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A synchronous control apparatus comprising:
an internal clock;
a plurality of internal routes that are internal routes through which a synchronization packet passes as a part of a communication route and a transmission or reception time of the synchronization packet is acquired from the internal clock, and are internal routes provided in such a manner as to correspond to communication routes of a plurality of systems that are independent of each other;
a synchronous control unit configured to synchronize the internal clock using the synchronization packet;
a detection unit configured to detect abnormality of the communication route;
a route control unit configured to, in a case where abnormality of the communication route has been detected, connect an internal route of a system in which abnormality has been detected to an internal route of a normal system; and
a holding calculation unit configured to calculate a holding time of a synchronization packet that is based on the transmission or reception time, for each route through which a synchronization packet passes, and add the holding time to a synchronization packet that passes through a same route as a route for which the holding time has been calculated.