Method and System for Localization Using One-Way Ranging Technique
First Claim
1. A method for determining a position of a target node using a one-way ranging technique in a wireless network, including a basic node, a first fixed node, a reference node, and a target node, comprising:
- (a) calculating a time when an RF signal originated from the reference node is directly transmitted to the basic node and a time when the RF signal relayed from the first fixed node arrives at the basic node;
(b) calculating a time when the RF signal originated from the target node is directly transmitted to the basic node and a time when the RF signal relayed from the first fixed node arrives at the basic node; and
(c) determining the position of the target node based on the time calculated from steps (a) and (b).
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Abstract
The present invention relates to a method and system for determining a position using a one-way ranging technique. The present invention provides a method for determining a position of a target node in a wireless network, including a basic node, a first fixed node, a reference node, a target node, including: (a) calculating a time needed to directly transmit an RF signal originated from the reference node to the basic node and a time needed to arrive at the basic node via the first fixed node; (b) calculating a time needed to directly transmit the RF signal originated from the target node to the basic node and a time needed to arrive at the basic node via the first fixed node; and (c) determining the position of the target node based on the time calculated from steps (a) and (b).
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Citations
13 Claims
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1. A method for determining a position of a target node using a one-way ranging technique in a wireless network, including a basic node, a first fixed node, a reference node, and a target node, comprising:
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(a) calculating a time when an RF signal originated from the reference node is directly transmitted to the basic node and a time when the RF signal relayed from the first fixed node arrives at the basic node; (b) calculating a time when the RF signal originated from the target node is directly transmitted to the basic node and a time when the RF signal relayed from the first fixed node arrives at the basic node; and (c) determining the position of the target node based on the time calculated from steps (a) and (b). - View Dependent Claims (2, 3, 4, 5)
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6. A method for determining a position of a target node using a one-way ranging technique in a wireless network, including a basic node, at least two fixed nodes, a reference node, and a target node, comprising:
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(a) calculating a time when an RF signal originated from the reference node is directly transmitted to the basic node and a time when the RF signal relayed from a first fixed node arrives at the basic node; (b) calculating a time when the RF signal originated from a target node is directly transmitted to the basic node and a relative position with respect to the basic node and the first fixed node of the target node by using results of step (a); (c) measuring a relative position with respect to the basic node and a second fixed node of the target node based on the time calculated from by performing steps (a) and (b) on the second fixed node; and (d) determining a position of the target node by using results of steps (b) and (c). - View Dependent Claims (7, 8, 9)
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10. A system for determining position, comprising:
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a target node including at least transmitting function and whose position should be determined; a reference node including at least transmitting function and whose position is known; at least two fixed nodes including a receiving function and a transmitting function and whose position is known; a basic node including at least receiving function and whose position is known; and a position calculating engine determining the position of the target node by using the difference between a time when the RF signal originated from each of the target node and the reference node is relayed through the fixed node and arrives at the basic node and a time when the RF signal originated from each of the target node and the reference node directly arrives at the basic node. - View Dependent Claims (11, 12, 13)
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Specification