METHOD AND APPARATUS FOR COMMUNICATION WITHIN CONTROL SYSTEMS

• US 20110046840A1
• Filed: 11/02/2010
• Published: 02/24/2011
• Est. Priority Date: 01/04/2005
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: Supal, Miroslawa A., Fuhrman, Thomas E., Millsap, Arnold W.
• Granted Patent: US 7,920,945 B2
• Time in Patent Office: Days
• US Class Current: 701/29
• CPC Class Codes: G06F 9/4881 Scheduling strategies for dispatcher, e.g. round robin, multi-level priority queues

Abstract

A drive-by-communication-signal vehicle includes a driver interface subsystem having a sensor responsive to an operational characteristic of the driver interface subsystem, a controller responsive to the sensor, a vehicle subsystem responsive to the controller, and a communication channel in signal communication with the driver interface subsystem, the controller, and the vehicle subsystem. The controller includes a storage medium, a processing circuit, and a clock synchronization mechanism defining synchronous communication cycles, with each communication cycle defining at least one time interval. The storage medium, being readable by the processing circuit, stores instructions for execution by the processing circuit for executing and communicating ordered tasks within defined time intervals with flexible task scheduling.

Claims

1. A drive-by-communication-signal vehicle, comprising:

a driver interface subsystem having a sensor responsive to an operational characteristic of the driver interface subsystem;

a controller responsive to the sensor;

a vehicle subsystem responsive to the controller; and

a communication channel in signal communication with the driver interface subsystem, the controller, and the vehicle subsystem;

wherein the controller comprises;

a storage medium;

a processing circuit; and

a clock synchronization mechanism defining synchronous communication cycles, each communication cycle defining at least one time interval;

the storage medium, readable by the processing circuit, storing instructions for execution by the processing circuit for;

executing, within a first time interval, a first source task to broadcast a first destination task;

communicating, within a second sequential time interval, the first destination task over a channel to a first destination;

consuming, within a third sequential time interval, the first destination task;

allowing the execution of a second source task to broadcast a second destination task within the first time interval;

allowing the communication of the second destination task over the channel to a second destination within the second sequential time interval; and

allowing the consumption of the second destination task within the third sequential time interval;

wherein the first source task is allowed to be scheduled ahead of the second source task, and the second source task is allowed to be scheduled ahead of the first source task.

2. The vehicle of claim 1, wherein:

each of the first, the second, and the third time intervals are a synchronous communication cycle.

3. The vehicle of claim 1, wherein:

each of the first, the second, and the third time intervals are a sequential segment of at least one synchronous communication cycle.

4. The vehicle of claim 3, wherein:

each synchronous communication cycle comprises at least two segments.

5. The vehicle of claim 1, wherein:

the communicating the first destination task over a channel comprises communicating the first destination task over a first channel slot;

the allowing the communication of the second destination task over the channel comprises allowing the communication of the second destination task over a second channel slot; and

the first channel slot is allowed to be scheduled ahead of the second channel slot, and the second channel slot is allowed to be scheduled ahead of the first channel slot.

6. The vehicle of claim 5, wherein:

the consumption of the first destination task is allowed to be scheduled ahead of the consumption of the second destination task, and the consumption of the second destination task is allowed to be scheduled ahead of the consumption of the first destination task.

7. The vehicle of claim 1, wherein:

the driver interface subsystem comprises a steering system interface, a braking system interface, a propulsion system interface, or any combination comprising at least one of the foregoing interfaces;

the vehicle subsystem comprises a steering control system, a braking control system, a propulsion control system, or any combination comprising at least one of the foregoing control systems;

the first source task broadcasts a vehicle subsystem control signal in response to the sensed operational characteristic; and

the first destination task defines a vehicle subsystem control function in response to the first source task.

8. The vehicle of claim 7, wherein:

the controller operably responds, in accordance with the first source task, to the operational characteristic received from the sensor; and

the vehicle subsystem operably responds, in accordance with the first destination task, to the control signal received from the controller.