Wireless transceiver
First Claim
1. A method for determining a distance between a wireless transceiver and a wireless receiver arranged to communicate with each other in a wireless communication network, the wireless receiver having an active and an inactive reception state, the method comprising:
- transmitting, with the wireless receiver in the active reception state, a first transmission signal;
receiving a first reflection signal, the first reflection signal being a reflection of the first transmission signal and influenced by the active reception state of the wireless receiver;
transmitting, with the wireless receiver in the inactive reception state, a second transmission signal;
receiving a second reflected signal, the second reflection signal being a reflection of the second transmission signal and influenced by the inactive reception state of the wireless receiver; and
determining a distance between the wireless transceiver and the wireless receiver based on the second reflection signal.
1 Assignment
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Accused Products
Abstract
The present invention relates to a method for determining a distance between a wireless transceiver and a wireless receiver arranged to communicate with each other in a wireless communication network, the wireless receiver having an active and an inactive reception state, the method comprising transmitting, with the wireless receiver in the active reception state, a first transmission signal, receiving a first reflection signal, the first reflection signal being a reflection of the first transmission signal and influenced by the active reception state of the wireless receiver, transmitting, with the wireless receiver in the inactive reception state, a second transmission signal, receiving a second reflected signal, the second reflection signal being a reflection of the second transmission signal and influenced by the inactive reception state of the wireless receiver, and determining a distance between the wireless transceiver and the wireless receiver based on the second reflection signal.
16 Citations
29 Claims
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1. A method for determining a distance between a wireless transceiver and a wireless receiver arranged to communicate with each other in a wireless communication network, the wireless receiver having an active and an inactive reception state, the method comprising:
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transmitting, with the wireless receiver in the active reception state, a first transmission signal; receiving a first reflection signal, the first reflection signal being a reflection of the first transmission signal and influenced by the active reception state of the wireless receiver; transmitting, with the wireless receiver in the inactive reception state, a second transmission signal; receiving a second reflected signal, the second reflection signal being a reflection of the second transmission signal and influenced by the inactive reception state of the wireless receiver; and determining a distance between the wireless transceiver and the wireless receiver based on the second reflection signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless transceiver together with a wireless receiver arranged to communicate with each other in a wireless communication network, the wireless receiver having an active and an inactive reception state, the wireless transceiver comprising:
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a transmitter for transmitting a first transmission signal with the wireless receiver in the active reception state and a second transmission signal with the wireless receiver in the inactive reception state; a receiver for receiving a first and a second reflection signal, the first reflection signal being a reflection of the first transmission signal and influenced by the active reception state of the wireless receiver, and the second reflection signal being a reflection of the second transmission signal and influenced by the inactive reception state of the wireless receiver; and a control unit adapted to determine a distance between the wireless transceiver and the wireless receiver based on the second reflection signal. - View Dependent Claims (14, 15, 16, 17)
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18. A wireless communication network comprising a wireless transceiver and a wireless receiver arranged to communicate with each other, the wireless receiver having an active and an inactive reception state, the wireless transceiver comprising:
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a transmitter for transmitting a first transmission signal with the wireless receiver in the active reception state and a second transmission signal with the wireless receiver in the inactive reception state; a receiver for receiving a first and a second reflection signal, the first reflection signal being a reflection of the first transmission signal and influenced by the active reception state of the wireless receiver, and the second reflection signal being a reflection of the second transmission signal and influenced by the inactive reception state of the wireless receiver being different from the first reception state; and a control unit adapted to determine a distance between the wireless transceiver and the wireless receiver based on the second reflection signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A wireless transceiver, comprising:
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a transmitter for transmitting an outgoing radio-frequency (RF) communication signal to a wireless node; a receiver for receiving RF communication signals carrying data from the wireless node including an echo signal resulting from reflection of said outgoing RF communication signal at said wireless node; and a control unit adapted for extracting said data from the received RF communication signal, and further adapted for determining a distance between the wireless transceiver and the wireless node based on said echo signal; wherein the control unit is further adapted to identifying the wireless node based on a difference between a first and a second echo signal resulting from reflection of outgoing RF communication signals at said wireless node, wherein the wireless node changes its reception state between an active and an inactive state between the reflection of the first and the second echo signals. - View Dependent Claims (27, 28, 29)
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Specification