Patent ID: 11941384
Assignee: DENSO CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  B | IPC B  G

Claim 7:
8. A rewrite target group administration method for a vehicle master device that is configured to acquire update data from a distribution device configured to distribute the update data, distribute the acquired update data to a plurality of rewrite target electronic control units (ECUs), and instruct the plurality of rewrite target ECUs to perform a program rewrite, the method comprising the steps of:
acquiring rewrite specification data that is generated in association with the update data; analyzing the acquired rewrite specification data;
dividing the plurality of rewrite target ECUs to generate one or more groups based on the analyzed rewrite specification data; and instructing the plurality of rewrite target ECUs for each group of the one or more groups to perform at least one of installation, rollback, and activation, wherein the method further includes the steps of;
instructing the plurality of rewrite target ECUs in an order determined based on the rewrite specification data;
giving an instruction for installation to the plurality of rewrite target ECUs, instructing the plurality of rewrite target ECUs in the order that is indicated by the rewrite specification data to perform installation; and
the plurality of rewrite target ECUs include a rewrite target ECU having a single-bank memory and a rewrite target ECU having a double-bank memory in one of the one or more groups, instructing the rewrite target ECU having the double-bank memory first to perform installation, and then instructing the rewrite target ECU having the single-bank memory last in the one of the one or more groups to perform installation.