Method and apparatus for communication within control systems
First Claim
1. A controller responsive to a clock synchronization mechanism defining synchronous communication cycles, each communication cycle defining at least one time interval, the controller comprising:
- a storage medium; and
a processing circuit;
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.
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Abstract
A method and apparatus for synchronous communication in a control system is disclosed. Within a first time interval, a first source task is executed to broadcast a first destination task, within a second sequential time interval, the first destination task is communicated over a channel to a first destination, and within a third sequential time interval, the first destination task is consumed. Within the first time interval, a second source task may be executed to broadcast a second destination task, within the second sequential time interval, the second destination task may be communicated over the channel to a second destination, and within the third sequential time interval, the second destination task may be consumed. 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.
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Citations
33 Claims
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1. A controller responsive to a clock synchronization mechanism defining synchronous communication cycles, each communication cycle defining at least one time interval, the controller comprising:
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a storage medium; and
a processing circuit;
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A drive-by-communication-signal vehicle, comprising:
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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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for synchronous communication in a control system, comprising:
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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;
executing a second source task to broadcast a second destination task within the first time interval;
communicating the second destination task over the channel to a second destination within the second sequential time interval; and
consuming 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. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A computer program product for synchronous communication in a control system, the product comprising:
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a storage medium, readable by a 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, delivery of the first destination task;
executing a second source task to broadcast a second destination task within the first time interval;
communicating the second destination task over the channel to a second destination within the second sequential time interval; and
consuming 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. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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32. A distributed control by wire system, comprising:
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a first processing circuit and a second processing circuit, each of the first and second processing circuits adapted for separately executing instructions 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; and
wherein the first and the second processing circuit each communicate over a shared channel. - View Dependent Claims (33)
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Specification