On-vehicle terminal system

• US 7,502,674 B2
• Filed: 07/24/2002
• Issued: 03/10/2009
• Est. Priority Date: 07/25/2001
• Status: Expired due to Fees

• Current Assignee: Clarion Co., Ltd. (Faurecia SA)
• Original Assignee: Hitachi, Ltd., Xanavi Informatics Corporation (Hitachi, Ltd.)
• Inventors: Hiroshige, Hideo, Endo, Yoshinori, Nakamura, Kozo, Okude, Mariko, Kamiwaki, Tadashi
• Primary Examiner(s): Tran; Khoi H.
• Assistant Examiner(s): MANCHO, RONNIE M
• Application Number:
  US10/201,640
• Publication Number:
  US 20030036843A1
• Time in Patent Office: 2,421 Days
• Field of Search: 701200-213, 701 29- 31, 701/36, 701/1, 705/8, 710/260, 710/261, 710/267, 342/357.01, 714/3, 711/173, 709/213, 709/214
• US Class Current: 701/36
• CPC Class Codes: G06F 2009/45579 I/O management, e.g. providing access to device drivers or storage
• CPC Class Codes: G06F 2009/45591 Monitoring or debugging support
• CPC Class Codes: G06F 9/45558 Hypervisor-specific management and integration aspects
• CPC Class Codes: G06F 9/4843 by program, e.g. task dispatcher, supervisor, operating system

Abstract

In an on-vehicle terminal system operating a plurality of operating systems, control of peripheral devices connected to the on-vehicle terminal system can be continued even if one of the operating systems is stopped.

A second operating system monitors an operating status of a first operating system using an OS status monitoring function. When the first operating system stops, a list recording allocation of the peripheral devices is updated to switch the allocation to the second operating system. By doing so, an interrupt signal from a peripheral device is allocated to the second operating system, and accordingly the second operating system can control the peripheral device.

Claims

1. An on-vehicle terminal system comprising:

an arithmetic-and-logic processing part in which first and second operating systems, independent of each other, are operated to execute processes of the on-vehicle terminal; and

an input/output control part, connected to a plurality of peripheral devices, including at least a communication unit,

wherein the arithmetic-and-logic processing part has means for allocating an interrupt signal from at least one of the peripheral devices to either one of the first and second operating systems, and

wherein the means for allocating the interrupt signal comprises;

means for storing an allocation list storing either one of the first and second operating systems to which, for each peripheral device, a control is allocated;

means for acquiring and controlling an operating status of each of the first and second operating systems; and

means for restarting the first operating system based on a request from the second operating system,

wherein the second operating system comprises means for acquiring and monitoring the operating status of the first operating system and means for directing switching of the first and second operating systems allocated to the at least one of the peripheral devices,

wherein, when the means for acquiring and monitoring said operating status detects that the first operating system is stopped, the means for directing switching of the operating systems changes processing of an interrupt signal received from the at least one of the peripheral devices from being processed by the first operating system to being processed by the second operating system, and afterwards the means for acquiring and monitoring said operating status directs the means for restarting the first operating system to restart the first operating system,

wherein, when the means for acquiring and monitoring said operating status detects that the first operating system is restarted, the means for directing switching of the operating systems changes processing of said interrupt signal back to being processed by the first operating system.

2. An on-vehicle terminal system according to claim 1, wherein the on-vehicle terminal system further comprises abnormality acquisition means for acquiring information on abnormalities on a vehicle, and emergency communication means for sending information on an abnormality, using said communication unit, when said abnormality acquisition means acquires the information on abnormalities.

3. An on-vehicle terminal system according to claim 2, which further comprises position detecting means for detecting a position of the vehicle, wherein said emergency communication means sends a message to a predetermined message receiver according to the position of the vehicle.

4. An on-vehicle terminal system according to claim 2, wherein said communication unit comprises a wireless interface.

5. An on-vehicle terminal system according to claim 1, which comprises a navigation function.