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Orientation method, device, and system

  • US 10,412,549 B2
  • Filed: 11/25/2014
  • Issued: 09/10/2019
  • Est. Priority Date: 11/25/2014
  • Status: Active Grant
First Claim
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1. An orientation method comprising:

  • determining a reference direction for orientation;

    when a first device rotates around an obstruction, receiving a wireless signal sent by a second device, and obtaining a link quality parameter value according to the received wireless signal;

    determining a position having greatest shadow fading of the first device according to the obtained link quality parameter value, and using a pointing direction of the position having the greatest shadow fading of the first device as a first pointing direction;

    determining a direction in which the second device is located by measuring (a) an included angle θ

    1 between the reference direction and the first pointing direction and (b) an included angle θ

    2 between the reference direction and a second pointing direction, wherein the second pointing direction is a pointing direction of the first device;

    using a clockwise rotation direction as a forward direction, obtaining an included angle θ

    between the first and second pointing directions after subtracting the included angle θ

    2 from the included angle θ

    1; and

    using the second pointing direction as an initial location, determining θ

    plus 180°

    as the direction in which the second device is located.

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