ESTIMATION OF GLOBAL POSITION OF A SENSOR NODE
First Claim
1. A method of locating a sensor node, the method comprising:
- collecting object trajectory information data for an object, wherein the object trajectory information data is collected over a first time span;
acquiring sensor node data at the sensor node, wherein the sensor node data is acquired over a second time span and is related to the object trajectory information data;
determining several direction indicators, each direction indicator providing an approximate sensor node bearing from the sensor node to the object at given instant of time during the second time span; and
determining coordinates of the sensor node using at least a portion of the collected trajectory information data and at least a portion of the acquired sensor node data.
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Abstract
Methods and apparatuses for locating a sensor node are disclosed. A representative apparatus, among others, includes a processing unit that receives sensor node data and object trajectory information data for an object. The sensor node data is related to the object'"'"'s trajectory, and a data point in the object trajectory information data comprises a time stamp and the coordinates of a position. The position corresponds the location of the object at the given time. The processing unit is adapted to correlate at least a portion of the sensor node data with at least a portion of the object trajectory information data to determine an absolute position of the sensor node.
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Citations
26 Claims
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1. A method of locating a sensor node, the method comprising:
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collecting object trajectory information data for an object, wherein the object trajectory information data is collected over a first time span; acquiring sensor node data at the sensor node, wherein the sensor node data is acquired over a second time span and is related to the object trajectory information data; determining several direction indicators, each direction indicator providing an approximate sensor node bearing from the sensor node to the object at given instant of time during the second time span; and determining coordinates of the sensor node using at least a portion of the collected trajectory information data and at least a portion of the acquired sensor node data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for locating a sensor node, the apparatus comprising:
a processing unit that receives sensor node data and object trajectory information data for an object, wherein the sensor node data is related to the object trajectory information data, wherein a data point in the object trajectory information data comprises a time stamp, which corresponds to a given time, and coordinates of the object at the given time, wherein the processing unit is adapted to correlate at least a portion of the sensor node data with at least a portion of the object trajectory information data to determine an absolute position of the sensor node. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A program embodied in a computer readable medium, the program comprising:
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logic configured to receive object trajectory information data for an object, wherein the object trajectory information data is collected over a first time span; logic configured to receive sensor node data, wherein the sensor node data is acquired over a second time span and is related to the object trajectory information data; logic configured to determine several direction indicators, each direction indicator providing an approximate sensor node bearing from the sensor node to the object at given instant of time during the second time span; and logic configured to determine coordinates of the sensor node using at least a portion of the collected trajectory information data and at least a portion of the acquired sensor node data. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification