Method and system for positioning mobile units based on angle measurements
First Claim
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1. A method for determining a position of a target mobile unit in a wireless communication system, the method comprising:
- identifying a neighboring mobile unit that is proximate to the target mobile unit and has a known location;
receiving a signal from the target mobile unit at the identified neighboring mobile unit;
measuring a direction of arrival of the received signal;
receiving a signal from a base station at the identified mobile unit;
measuring a direction of arrival of the signal received from the base station;
calculating an angle between the signal received from the target mobile unit and the signal received from the base station; and
determining the position of the target mobile unit using the calculated angle.
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Abstract
A method and system for positioning mobile units using angle measurements taken by neighboring mobile units is disclosed. A selected mobile unit and mobile units in the vicinity of the selected mobile unit are selectively instructed to measure and report information related to the position of the selected mobile unit. The reported information is used to compute a position of the selected mobile unit.
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Citations
14 Claims
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1. A method for determining a position of a target mobile unit in a wireless communication system, the method comprising:
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identifying a neighboring mobile unit that is proximate to the target mobile unit and has a known location;
receiving a signal from the target mobile unit at the identified neighboring mobile unit;
measuring a direction of arrival of the received signal;
receiving a signal from a base station at the identified mobile unit;
measuring a direction of arrival of the signal received from the base station;
calculating an angle between the signal received from the target mobile unit and the signal received from the base station; and
determining the position of the target mobile unit using the calculated angle. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for determining a position of a target mobile unit in a wireless communication system, the apparatus comprising:
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means for identifying a neighboring mobile unit having a known location that is capable of receiving a signal from the target mobile unit;
means for transmitting an instruction to the identified neighboring mobile unit to measure a direction of arrival of a signal received from the target mobile unit;
means for measuring a direction of arrival of a signal received from the target mobile unit;
means for measuring a direction of arrival of a signal from a base station; and
means for calculating an angle between a signal from the target mobile unit and a signal from the base station wherein the calculating means is configured to determine the position of the target mobile unit using the calculated angle. - View Dependent Claims (7, 8, 9, 10)
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11. A mobile unit for providing positioning information related to a target mobile unit identified for positioning comprising:
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an adaptive antenna array for computing a direction of arrival of incoming signals; and
a processor for measuring and reporting an angle between two incoming signals for which the mobile unit has measured directions of arrival. - View Dependent Claims (12, 13, 14)
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Specification