POWER MANAGEMENT SYSTEM AND METHOD FOR VEHICLE LOCATING UNIT
18 Assignments
0 Petitions
Accused Products
Abstract
Improved power management for a vehicle locating unit is achieved by receiving a transmission from a communication source, each transmission including at least one message frame having a data field and at least one auxiliary field; entering a wake mode upon indexing the assigned message frame of the receiver in the transmission; matching the pattern of bits of at least one auxiliary field of the indexed frame with one or more stored patterns of bits expected for that auxiliary field; and returning to the sleep mode as soon as a mismatch is determined or processing the message if no mismatch occurs.
13 Citations
26 Claims
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1-14. -14. (canceled)
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15. A power management system for a vehicle locating unit, the vehicle locating unit having a receiver for receiving at an assigned message frame from a communications source an intermittent transmission, wherein each intermittent transmission includes at least one assignable message frame, the power management system comprising:
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a processing device for controlling wake and sleep modes of the receiver; and a memory for storing a plurality of memory bit patterns for comparison with a pattern of bits contained in some portion of an assigned message frame, wherein the processing device is configured to perform the following steps; index to the receiver'"'"'s assigned message frame in the intermittent transmission; and re-enter the wake-up mode after indexing, wherein operation of the system subjects the receiver to a constant average current draw due to indexing. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of power management for a vehicle locating unit, the vehicle locating unit having a receiver for receiving at an assigned message frame from a communications source an intermittent transmission, wherein each intermittent transmission includes at least one assignable message frame, a processing device for controlling wake and sleep modes of the receiver;
- and a memory for storing a plurality of memory bit patterns for comparison with a pattern of bits contained in some portion of an assigned message frame, the method comprising the receiver;
indexing to the receiver'"'"'s assigned message frame in the intermittent transmission; and re-entering the wake-up mode after indexing, while subjecting the receiver to a constant average current draw. - View Dependent Claims (23, 24, 25, 26)
- and a memory for storing a plurality of memory bit patterns for comparison with a pattern of bits contained in some portion of an assigned message frame, the method comprising the receiver;
Specification