METHOD AND SYSTEM FOR MONITORING AND LOCATING ITEMS
First Claim
1. A method for determining a distance between a pair of Bluetooth transceivers, the method comprises:
- transmitting a first message from a first Bluetooth transceiver to a second Bluetooth transceiver, wherein the first message comprises a request from the second Bluetooth transceiver to transmit a second message that comprises a second message transmission power indicator that is indicative of a transmission power of the second message;
receiving the second massage by the first Bluetooth transceiver and measuring a reception power of the second message; and
calculating the distance between the first and second Bluetooth transceivers based on a relationship between the transmission power of the second message and the reception power of the second message.
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Abstract
A monitoring system includes a first device and a second device. The first device includes: a first Bluetooth transceiver, for transmitting a first message to a second Bluetooth transceiver, wherein the first message includes a request from the second Bluetooth transceiver to transmit a second message that includes a second message transmission power indicator that is indicative of a transmission power of the second message; and for receiving the second massage by the first Bluetooth transceiver and measuring a reception power of the second message; and a distance calculator for calculating the distance between the first and second Bluetooth transceivers based on a relationship between the transmission power of the second message and the reception power of the second message. The second device includes: a second Bluetooth transceiver, for transmitting the second message to the first Bluetooth transceiver, wherein the second message includes the second message transmission power indicator that is indicative of the transmission power of the second message.
44 Citations
33 Claims
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1. A method for determining a distance between a pair of Bluetooth transceivers, the method comprises:
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transmitting a first message from a first Bluetooth transceiver to a second Bluetooth transceiver, wherein the first message comprises a request from the second Bluetooth transceiver to transmit a second message that comprises a second message transmission power indicator that is indicative of a transmission power of the second message; receiving the second massage by the first Bluetooth transceiver and measuring a reception power of the second message; and calculating the distance between the first and second Bluetooth transceivers based on a relationship between the transmission power of the second message and the reception power of the second message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 27, 28, 29, 31, 32, 33)
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15. A monitoring device, comprising:
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a first Bluetooth transceiver, for transmitting a first message to a second Bluetooth transceiver, wherein the first message comprises a request from the second Bluetooth transceiver to transmit a second message that comprises a second message transmission power indicator that is indicative of a transmission power of the second message; and
for receiving the second massage by the first Bluetooth transceiver and measuring a reception power of the second message; anda distance calculator for calculating the distance between the first and second Bluetooth transceivers based on a relationship between the transmission power of the second message and the reception power of the second message. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A system, comprising a first device and a second device;
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wherein the first device comprises; a first Bluetooth transceiver, for transmitting a first message to a second Bluetooth transceiver, wherein the first message comprises a request from the second Bluetooth transceiver to transmit a second message that comprises a second message transmission power indicator that is indicative of a transmission power of the second message; and
for receiving the second massage by the first Bluetooth transceiver and measuring a reception power of the second message; anda distance calculator for calculating the distance between the first and second Bluetooth transceivers based on a relationship between the transmission power of the second message and the reception power of the second message; wherein the second device comprises; a second Bluetooth transceiver, for transmitting the second message to the first Bluetooth transceiver, wherein the second message comprises the second message transmission power indicator that is indicative of the transmission power of the second message. - View Dependent Claims (30)
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Specification