In-Car-Use Multi-Application Execution Device

• US 20120216208A1
• Filed: 08/12/2010
• Published: 08/23/2012
• Est. Priority Date: 11/06/2009
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: Takemura, Masayuki, Muramatsu, Shoji, Furusawa, Isao, Ohtsuji, Shinya, Shima, Takeshi
• Granted Patent: US 8,832,704 B2
• Time in Patent Office: Days
• US Class Current: 718/103
• CPC Class Codes: G06F 9/4887 involving deadlines, e.g. rate based, periodic
• CPC Class Codes: G08G 1/09623 Systems involving the acquisition of information from passive traffic signs by means mounted on the vehicle G08G1/0967 takes precedence
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element
• CPC Class Codes: G08G 1/096791 where the origin of the information is another vehicle
• CPC Class Codes: G08G 1/166 for active traffic, e.g. moving vehicles, pedestrians, bikes
• CPC Class Codes: G08G 1/167 Driving aids for lane monitoring, lane changing, e.g. blind spot detection

Abstract

An in-car-use multi-application execution device is provided that ensures safety while maintaining convenience by securing operation of a plurality of applications and suppressing occurrence of a termination process within a limited processing capacity without degrading a real-time feature. The in-car-use multi-application execution device dynamically predicts a processing time for each application, and schedules each application on the basis of the predicted processing time. If it is determined that an application failing to complete a process in a prescribed cycle exists as a result of the scheduling, a process is executed that terminates the application or degrades the function of the application on the basis of a preset priority order.

Claims

1. An in-car-use multi-application execution device executing a plurality of applications in a prescribed cycle, comprising:

a dynamic processing time prediction unit dynamically predicting a processing time of each application;

a multi-application controller scheduling each application on the basis of the processing time dynamically predicted by the dynamic processing time prediction unit; and

a multi-application execution unit executing processes of the plurality of applications on the basis of a result of the scheduling in the multi-application controller.

2. The in-car-use multi-application execution device according to claim 1, wherein, if the multi-application execution unit determines as a result of the scheduling in the multi-application controller that an application failing to complete a process in a preset prescribed cycle exists, the multi-application execution unit terminates the application or degrades a function of the application on the basis of the preset priority order.

3. The in-car-use multi-application execution device according to claim 2, wherein the multi-application execution unit classifies the applications according to safety and convenience functions, and executes scheduling such that a process of the application related to safety continues even after an end of the prescribed cycle and a process of the application related to convenience stops on the end of the prescribed cycle.

4. The in-car-use multi-application execution device according to claim 2, wherein the multi-application execution unit divides a process into pieces for respective target candidates to be processed by the application and executes the pieces.

5. The in-car-use multi-application execution device according to claim 2, further comprising a multi-core or a multi-CPU,

wherein, if the multi-application execution unit determines as a result of the scheduling in the multi-application controller that an application failing to complete a process in the prescribed cycle exists, the multi-application execution unit changes a core or a CPU, which are designated in order to operate the application, to another core or CPU.

6. The in-car-use multi-application execution device according to claim 2, further comprising a multi-core or a multi-CPU,

wherein, if the multi-application execution unit determines as a result of the scheduling in the multi-application controller that an application failing to complete a process in the preset prescribed cycle exists or if the multi-application execution unit intends to complete processes of the respective applications before the prescribed cycle, the multi-application execution unit causes the multi-core or the multi-CPU to execute parallel processing on the same application.

7. The in-car-use multi-application execution device according to claim 2, further comprising a multi-core or a multi-CPU,

wherein, the multi-application execution unit divides a task of the application according to recognition targets having little data interdependency, and causes the multi-core or the multi-CPU to execute parallel processing.

8. The in-car-use multi-application execution device according to claim 1, wherein, if an available time of a prescribed or higher value continuously exists in the prescribed cycle as a result of the scheduling, the multi-application controller reduces the processing time in the prescribed cycle.

9. The in-car-use multi-application execution device according to claim 1, wherein, if an available time of a prescribed or higher value continuously exists in the prescribed cycle as a result of the scheduling, the multi-application controller executes scheduling of adding the application having a convenience function into the prescribed cycle.

10. The in-car-use multi-application execution device according to claim 1, wherein the dynamic processing time prediction unit dynamically predicts the processing time on the basis of at least one of information on a preset task table, a state of execution of the application, a car control state, and travel environment information.

11. The in-car-use multi-application execution device according to claim 1, wherein, in a case where the application executes a process of narrowing down an image processing region on the basis of the detection result of a radar and recognizing a recognition target,

the dynamic processing time prediction unit dynamically predicts the processing time using detection result by the radar.

12. The in-car-use multi-application execution device according to claim 1, wherein, the dynamic processing time prediction unit dynamically predicts the processing time using map information stored in a navigation system or a history of an actual processing time for previous traveling of an own car.

13. The in-car-use multi-application execution device according to claim 1, further comprising own car travel information acquisition unit acquiring travel information of an own car,

wherein the multi-application execution unit sets a processing mode of the application on the basis of the own car travel information acquired by the own car travel information acquisition unit, and

the dynamic processing time prediction unit predicts the predicted processing time on the basis of the processing mode set by the multi-application execution unit.