US 11,914,444 B2
Managing activation time of slave ECUs in sleep state with a management table when ignition is turned off
Tomoya Tokunaga, Tokyo (JP); Yusuke Yoshimura, Tokyo (JP); and Satoshi Kono, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Feb. 24, 2022, as Appl. No. 17/679,134.
Claims priority of application No. 2021-058451 (JP), filed on Mar. 30, 2021.
Prior Publication US 2022/0317753 A1, Oct. 6, 2022
Int. Cl. G06F 1/32 (2019.01); G06F 1/3206 (2019.01); H04L 12/40 (2006.01); H04W 4/48 (2018.01)
CPC G06F 1/3206 (2013.01) [H04L 12/40039 (2013.01); H04W 4/48 (2018.02); H04L 2012/40215 (2013.01); H04L 2012/40273 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An in-vehicle electronic system comprising:
a core ECU (Electronic Control Unit) mounted in a vehicle; and
a plurality of slave ECUs that is capable of communicating with the core ECU through an in-vehicle communication network,
wherein the core ECU is configured to:
manage a current time while a main power source of the vehicle is in an off state; and
manage an activation time of each of the plurality of slave ECUs in a sleep state with a management table while the main power source is in the off state;
wherein the core ECU is configured to send an activation signal to each slave ECU through the in-vehicle communication network when the current time becomes the activation time of each of the plurality of slave ECUs while the main power source is in the off state, and
wherein the core ECU is configured to receive the activation time of each slave ECU from each of the plurality of slave ECUs in a case where the main power source is turned to the off state, and based on the received activation time, update the activation time managed by the management table.