Method and apparatus for two-way ranging
First Claim
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1. A method for measuring processing delay in a wireless access point, comprising:
- wirelessly receiving a first communication from a first mobile device, the first communication being indicative of a ranging request;
wirelessly transmitting an acknowledgement communication indicating receipt of the first communication responsive to receiving the first communication;
measuring a processing delay between receiving the first communication from the first mobile device and transmitting the acknowledgement communication indicating receipt of the first communication responsive to transmitting the acknowledgment communication; and
transmitting a measurement of the processing delay separately from the acknowledgement communication in a broadcast packet, wherein the measurement of the processing delay is included with a packet to be transmitted to the first mobile device, the packet being unrelated to the first communication or the acknowledgement communication.
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Abstract
The subject matter disclosed herein relates to a system and method for wirelessly receiving a first communication from a first mobile device. A processing delay may be measured. An acknowledgement communication indicating receipt of the first communication may be generated. A measurement of the processing delay may be broadcast in a broadcast packet, for example, or by transmitting a subsequent communication including the processing delay in response to receiving a second communication having a request for the measurement of the processing delay.
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Citations
33 Claims
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1. A method for measuring processing delay in a wireless access point, comprising:
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wirelessly receiving a first communication from a first mobile device, the first communication being indicative of a ranging request; wirelessly transmitting an acknowledgement communication indicating receipt of the first communication responsive to receiving the first communication; measuring a processing delay between receiving the first communication from the first mobile device and transmitting the acknowledgement communication indicating receipt of the first communication responsive to transmitting the acknowledgment communication; and transmitting a measurement of the processing delay separately from the acknowledgement communication in a broadcast packet, wherein the measurement of the processing delay is included with a packet to be transmitted to the first mobile device, the packet being unrelated to the first communication or the acknowledgement communication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless device, comprising:
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a communication device to wirelessly receive a first communication from a first mobile device, the first communication being indicative of a ranging request; and a processor to; wirelessly transmit, via the communication device, an acknowledgement communication indicating receipt of the first communication to the first mobile device responsive to receiving the first communication; measure a processing delay between receiving the first communication from the first mobile device and transmitting the acknowledgement communication indicating receipt of the first communication responsive to transmitting the acknowledgement communication; and transmit a measurement of the processing delay separately from the acknowledgement communication in a broadcast packet, wherein the measurement of the processing delay is included with a packet to be transmitted to the first mobile device, the packet being unrelated to the first communication or the acknowledgement communication. - View Dependent Claims (10, 12, 13, 14, 15, 16, 17, 18, 19)
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11. The wireless device of 9, wherein the first communication comprises a packet-based communication.
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20. An apparatus, comprising:
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means for wirelessly receiving a first communication from a first mobile device, the first communication being indicative of a ranging request; means for wirelessly transmitting an acknowledgement communication indicating receipt of the first communication to the first mobile device responsive to receiving the first communication; a processor for measuring a processing delay between receiving the first communication from the first mobile device and transmitting the acknowledgement communication indicating receipt of the first communication responsive to transmitting the acknowledgement communication; and means for transmitting a measurement of the processing delay separately from the acknowledgement communication in a broadcast packet, wherein the measurement of the processing delay is included with a packet to be transmitted to the first mobile device, the packet being unrelated to the first communication or the acknowledgement communication. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A non-transitory computer-readable medium encoded with instructions which, when executed by a special purpose apparatus, are adapted to direct the special purpose apparatus to perform operations, the instructions comprising:
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code to receive a first communication from a first mobile device, the first communication being indicative of a ranging request; code to transmit, via a wireless communication device, an acknowledgement communication indicating receipt of the first communication to the first mobile device responsive to receiving the first communication; code to measure a processing delay between receiving the first communication from the first mobile device and-transmitting the acknowledgement communication indicating receipt of the first communication responsive to the transmitting the acknowledgement communication; code to transmit a measurement of the processing delay separately from the acknowledgement communication in a broadcast packet, wherein the code to transmit the measurement of the processing delay comprises code to include the measurement of the processing delay with a packet to be transmitted to the first mobile device, the packet being unrelated to the first communication or the acknowledgement communication. - View Dependent Claims (30, 31, 32, 33)
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Specification