METHOD AND APPARATUS REPORTING A VEHICULAR SENSOR WAVEFORM IN A WIRELESS VEHICULAR SENSOR NETWORK
First Claim
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1. A method, comprising the step of:
- operating a wireless vehicular sensor node communicatively coupled to a sensor, comprising the steps of;
using a vehicle sensor state from said sensor to create a waveform characteristic and a vehicular waveform;
turning-on a vehicle presence based upon a rising edge in a latest of said waveform characteristics;
turning-off said vehicle presence based upon a falling edge in said latest of said waveform characteristics; and
generating a long report approximating said vehicular waveform for wireless transmission when said vehicle presence is turned on.
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Abstract
The invention includes using multiple wireless vehicular sensor nodes to wirelessly receive multiple, time-interleaved vehicular waveform reports from the nodes. Each vehicular waveform report approximates a raw vehicular sensor waveform observed by a magnetic sensor at the node based upon the presence of a vehicle. The vehicular waveform reports are products of this wirelessly receiving process. The invention includes apparatus supporting the above outlined process. The vehicular waveform reports may be time synchronized.
31 Citations
21 Claims
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1. A method, comprising the step of:
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operating a wireless vehicular sensor node communicatively coupled to a sensor, comprising the steps of; using a vehicle sensor state from said sensor to create a waveform characteristic and a vehicular waveform; turning-on a vehicle presence based upon a rising edge in a latest of said waveform characteristics; turning-off said vehicle presence based upon a falling edge in said latest of said waveform characteristics; and generating a long report approximating said vehicular waveform for wireless transmission when said vehicle presence is turned on. - View Dependent Claims (2, 17)
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3. A wireless vehicular sensor node, comprising:
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means for using a vehicular sensor state from a sensor to create a vehicular sensor waveform and a waveform characteristic based upon said sensor observing the presence of a vehicle; and means for operating a wireless transmitter based upon said waveform characteristic to send a long report across at least one wireless physical transport to approximate said vehicle sensor waveform. - View Dependent Claims (4, 5)
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6. An apparatus, comprising:
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means for wirelessly receiving a first vehicular waveform report from a first wireless vehicular sensor node time-interleaved based upon a time synchronization message with a second vehicular waveform report from a second wireless vehicular sensor node, whereby both said first wireless vehicular sensor node and said second wireless vehicular sensor node receive said time synchronization message; wherein said first vehicular waveform report approximates a first raw vehicular sensor waveform created by a first sensor observing the presence of a first vehicle; wherein said second vehicular waveform report approximates a second raw vehicular sensor waveform created by a second sensor observing the presence of a second vehicle; wherein said first wireless vehicular sensor node operates said first sensor; and
wherein said second wireless vehicular sensor node operates said second sensor. - View Dependent Claims (7, 8, 9, 18, 19)
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10. An access point for wirelessly communicating with a first wireless vehicular sensor node and a second wireless vehicular sensor node, and comprising:
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means for wirelessly receiving a first vehicular waveform report from a first wireless vehicular sensor node time-interleaved with a second vehicular waveform report from a second wireless vehicular sensor node; wherein said first vehicular waveform report approximates a first raw vehicular sensor waveform created by a first sensor observing the presence of a first vehicle; wherein said second vehicular waveform report approximates a second raw vehicular sensor waveform created by a second sensor observing the presence of a second vehicle; wherein said first wireless vehicular sensor node operates said first sensor; and
wherein said second wireless vehicular sensor node operates said second sensor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 20, 21)
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Specification