Anonymous collection of directional transmissions
AssigneeDeeyook Location Technologies Ltd.
InventorEran Shpak
Life of this patent
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Abstract
A method for communication includes detecting, at a first station in a wireless network, a beacon transmitted over the wireless network by a second station having multiple antennas. In response to the beacon, a request-to-send (RTS) frame is transmitted over the wireless network using a multi-carrier modulation scheme from the first station to the second station. The first station receives a clear-to-send (CTS) frame transmitted over the wireless network, in response to the RTS frame, by the second station via the multiple antennas using the multi-carrier modulation scheme, and estimates an angle of transmission from the second station to the first station based on the received CTS frame.
Claims24
A method for communication, comprising:
- detecting, at a first station in a wireless network, a beacon transmitted using a single-carrier modulation scheme over the wireless network by a second station having multiple antennas;
- in response to the beacon, transmitting a request-to-send (RTS) frame over the wireless network using a multi-carrier modulation scheme from the first station to the second station;
- receiving at the first station a clear-to-send (CTS) frame transmitted over the wireless network, in response to the RTS frame, by the second station via the multiple antennas using the multi-carrier modulation scheme;
- estimating an angle of transmission from the second station to the first station based on the received CTS frame;
- and
- finding location coordinates of the first station based on the estimated angles of transmission from the second station.
A method for communication, comprising:
- detecting, at a first station in a wireless network, a beacon transmitted over the wireless network by a second station having multiple antennas;
- in response to the beacon, transmitting a request-to-send (RTS) frame over the wireless network using a multi-carrier modulation scheme from the first station to the second station;
- receiving at the first station a clear-to-send (CTS) frame transmitted over the wireless network, in response to the RTS frame, by the second station via the multiple antennas using the multi-carrier modulation scheme;
- and
- estimating an angle of transmission from the second station to the first station based on the received CTS frame,
- wherein detecting the beacon comprises extracting a medium access control (MAC) address of the second station from the beacon, and wherein transmitting the RTS frame comprises inserting the MAC address as a receiver address (RA) in the RTS frame, and
- wherein transmitting the RTS frame comprises generating a spoofed address that encodes the MAC address of the second station, and inserting the spoofed address as a transmitter address (TA) in the RTS frame, thereby causing the second station to insert the spoofed address as the RA in the CTS frame.
Apparatus for communication, comprising:
- a transceiver, which is configured to detect a beacon transmitted using a single-carrier modulation scheme over a wireless network by a station having multiple antennas;
- and
- a processor, which is configured to drive the transceiver, in response to the beacon, to transmit a request-to-send (RTS) frame over the wireless network using a multi-carrier modulation scheme to the station, and to process a clear-to-send (CTS) frame transmitted over the wireless network, in response to the RTS frame, by the station via the multiple antennas using the multi-carrier modulation scheme and received by the transceiver, in order to estimate an angle of departure from the station to the apparatus and to find location coordinates of the first station based on the estimated angles of transmission from the second station.
A computer software product, comprising a non-transitory computer-readable medium in which program instructions are stored, which instructions, when read by a processor, cause the processor to detect a beacon transmitted using a single-carrier modulation scheme over a wireless network by a station having multiple antennas, and to transmit, in response to the beacon, a request-to-send (RTS) frame over the wireless network using a multi-carrier modulation scheme to the station, and to receive and process a clear-to-send (CTS) frame transmitted over the wireless network, in response to the RTS frame, via the multiple antennas using the multi-carrier modulation scheme in order to estimate an angle of departure from the station and to find location coordinates based on the estimated angles of transmission from the station.
Apparatus for communication, comprising:
- a transceiver, which is configured to detect a beacon transmitted over a wireless network by a station having multiple antennas;
- and
- a processor, which is configured to drive the transceiver, in response to the beacon, to transmit a request-to-send (RTS) frame over the wireless network using a multi-carrier modulation scheme to the station, and to process a clear-to-send (CTS) frame transmitted over the wireless network, in response to the RTS frame, by the station via the multiple antennas using the multi-carrier modulation scheme and received by the transceiver, in order to estimate an angle of departure from the station to the apparatus,
- wherein the processor is configured to extract a medium access control (MAC) address of the station from the beacon, and to insert the MAC address as a receiver address (RA) in the RTS frame, and
- wherein the processor is configured to generate a spoofed address that encodes the MAC address of the station, and to insert the spoofed address as a transmitter address (TA) in the RTS frame, thereby causing the station to insert the spoofed address as the RA in the CTS frame.
Dependencies are inferred from the claim text.