Car onboard control device and program updating software

Patent metadata

Field	Value
Publication number	US-11263001-B2
Application number	US-201816477787-A
Country	US
Kind code	B2
Filing date	Mar 15, 2018
Priority date	Mar 24, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A decompression and restoration unit, when differential data between a new execution program and a specific program is input, decompresses and restores the compressed specific program and rewrites the execution program as the specific program. A differential restoration unit differentially restores the new execution program from the differential data and the specific program and rewrites the specific program as the new execution program. A differential restoration unit that, when differential data between a new execution program and a specific program is input, differentially restores the new execution program from the differential data and the execution program in a memory unit and rewrites the execution program in the memory unit as the new execution program. The decompression and restoration unit decompresses and restores the compressed specific program and rewrites the new execution program as the specific program.

First claim

The invention claimed is:

1. An in-vehicle control device of a vehicle, the in-vehicle control device comprising:
a memory storing a rewritable execution program and a compressed specific program; and
at least one processor configured to:
when differential data between a new execution program and the compressed specific program is input, decompress and restore the compressed specific program and rewrite the new execution program as the compressed specific program;
differentially restore the new execution program from the differential data and the compressed specific program in the memory and rewrite the compressed specific program in the memory as the new execution program; and
limit the compressed specific program to an emergency program having only functions necessary for running the vehicle.

2. The in-vehicle control device according to claim 1 , wherein the at least one processor is configured to perform a diagnosis of the new execution program, and
rewrite the new execution program as the compressed specific program depending on result of the diagnosis.

3. The in-vehicle control device according to claim 2 , wherein
the memory includes a first memory area in which the new execution program is stored and a second memory area in which the compressed specific program is stored,
the at least one processor is configured to:
decompress and restore the compressed specific program in the second memory area and rewrite the new execution program in the first memory area as the compressed specific program, and
differentially restore the new execution program from the differential data and the compressed specific program in the first memory area and rewrite the compressed specific program in the first memory as the new execution program.

4. The in-vehicle control device according to claim 2 , wherein, the at least one processor is configured to, when a shift gear of the vehicle is in a parking position, rewrite the execution program as the new execution program.

5. The in-vehicle control device according to claim 1 , wherein the at least one processor is configured to repeatedly perform processing for each section of a program.

6. An in-vehicle control device of a vehicle, the in-vehicle control device comprising:
a memory storing a rewritable execution program and a compressed specific program;
at least one processor is configured to,
when differential data between a new execution program and the compressed specific program is input, differentially restore the new execution program from the differential data and the new execution program in the memory,
rewrite the execution program in the memory as the new execution program;
decompress and restore the compressed specific program and rewrite the new execution program as the specific program; and
limit the compressed specific program to an emergency program having only functions necessary for running the vehicle.

7. The in-vehicle control device according to claim 6 , wherein the at least one processor is configured to:
perform a diagnosis of the new execution program,
rewrite the new execution program as the compressed specific program depending on result of the diagnosis, and
when the diagnosis is abnormal, store the emergency program in a restoration area of the memory.

8. The in-vehicle control device according to claim 6 , wherein
the memory includes a first memory area in which the new execution program is stored and a second memory area in which the compressed specific program is stored,
the at least one processor is configured to differentially restore the new execution program from the differential data and the execution program in the first memory and rewrite the execution program in the first memory as the new execution program, and
decompress and restore the compressed specific program in the second memory area and rewrite the new execution program in the first memory area as the compressed specific program.

9. The in-vehicle control device according to claim 6 , wherein the at least one processor is configured to,
when a shift gear of the vehicle is in a parking position, rewrite the execution program as the new execution program, and
rewrite the new execution program as the compressed specific program depending on result of the diagnosis.

10. A non-transitory computer readable medium storing instructions for an in-vehicle control device of a vehicle, the in-vehicle control device including a memory having a rewritable execution program and a compressed specific program, the instructions, when executed by a computer, performing a method comprising:
when differential data between a new execution program and the compressed specific program is input, decompressing and restoring the compressed specific program and rewriting the new execution program as the compressed specific program;
differentially restoring the new execution program from the differential data and the compressed specific program in the memory and rewriting the compressed specific program in the memory as the new execution program; and
limiting the compressed specific program to an emergency program having only functions necessary for running the vehicle.

11. The medium according to claim 10 , wherein the method comprises performing a diagnosis of the new execution program, rewriting
the new execution program as the compressed specific program depending on result of the diagnosis.

12. The medium according to claim 11 , wherein
the memory includes a first memory area in which the execution program is stored and a second memory area in which the compressed specific program is stored,
the method further comprising decompressing and restoring the compressed specific program in the second memory area, rewriting the execution program in the first memory area as the compressed specific program, and restoring the new execution program from the differential data and the compressed specific program in the first memory, and rewriting the specific program in the first memory as the new execution program.

13. The medium according to claim 11 , wherein the method further comprises, when a shift gear of the vehicle is in a parking position, the execution program is rewritten as the new execution program.

14. The medium according to claim 10 , wherein the operations further comprise repeatedly perform processing for each section of a program.

15. A non-transitory computer readable medium storing instructions for an in-vehicle control device of a vehicle, the in-vehicle control device including a memory having a rewritable execution program and a compressed specific program, the instructions, when executed by a computer, cause operations to be carried out, the operations comprising:
when differential data between a new execution program and the compressed specific program is input, differentially restoring the new execution program from the differential data and the execution program in the memory and rewriting the execution program in the memory as the new execution program;
decompressing and restoring the compressed specific program and rewriting the new execution program as the compressed specific program; and
limiting the compressed specific program to an emergency program having only functions necessary for running the vehicle.

16. The medium according to claim 15 , wherein the operations further comprise performing a diagnosis of the new execution program,
rewriting the new execution program as the compressed specific program depending on result of the diagnosis.

17. The medium according to claim 15 , wherein
the memory

Assignees

• Hitachi Automotive Systems Ltd
• Hitachi Astemo Ltd

Inventors

• Kurosawa Kenichi
• Nakahara Fumiharu
• Abe Yusuke

Classifications

• G06F8/658 Primary

  Incremental updates; Differential updates · CPC title

• G06F8/654

  using techniques specially adapted for alterable solid state memories, e.g. for EEPROM or flash memories · CPC title

• G07C5/0808

  Diagnosing performance data (testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005) · CPC title

• G06F11/1433 Primary

  during software upgrading · CPC title

• B60W50/0225

  Failure correction strategy · CPC title