Wireless local area network based positioning method and device

  • US 10,383,083 B2
  • Filed: 09/11/2017
  • Issued: 08/13/2019
  • Est. Priority Date: 09/18/2016
  • Status: Active Grant
First Claim
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1. A wireless local area network based positioning method, comprising:

  • Acquiring, by first Received Signal Strength Indicator (RSSI) information and at least one second RSSI information, wherein the first RSSI information is measured based on a first point-to-point message sent by a mobile terminal to a routing device, and the at least one second RSSI information is measured based on a second point-to-point message sent by at least one intelligent device to the routing device;

    receiving at least one third RSSI information reported by the mobile terminal, wherein the at least one third RSSI information is measured based on a third point-to-point message sent by the at least one intelligent device to the mobile terminal;

    receiving at least one fourth RSSI information reported by the at least one intelligent device, wherein the at least one fourth RSSI information is measured based on a fourth point-to-point message sent by any one of the at least one intelligent device to other intelligent devices;

    reporting positioning of the mobile terminal, the routing device, and the at least one intelligent device based on the first RSSI information, the at least one second RSSI information, the at least one third RSSI information, and the at least one fourth RSSI information; and

    re-collecting RSSI information and re-determining positioning of the mobile terminal, the routing device, and the at least one intelligent device when any one of the at least one intelligent device is replaced wherein the replaced intelligent device is placed according to the re-collected RSSI information and the re-determined positioning of the mobile terminal, the routing device, and the at least one intelligent device; and

    wherein reporting positioning of the mobile terminal, the routing device, and the at least one intelligent device based on the first RSSI information, the at least one second RSSI information, the at least one third RSSI information, and the at least one fourth RSSI information comprises one of;

    deriving a relative location map based on the first RSSI information, the at least one second RSSI information, the at least one third RSSI information, and the at least one fourth RSSI information, and transmitting the relative location map to the mobile terminal, wherein the relative location map indicates relative positions of the mobile terminal, the routing device, and the at least one intelligent device, andtransmitting the first RSSI information, the at least one second RSSI information, the at least one third RSSI information, and the at least one fourth RSSI information to a designated server such that the designated server plots the relative location map and then transmits the relative location map to the mobile terminal;

    wherein deriving the relative location map based on the first RSSI information, the at least one second RSSI information, the at least one third RSSI information, and the at least one fourth RSSI information comprises;

    determining a first distance between the routing device and the mobile terminal based on the first RSSI information, wherein any point on a first circle is a location of the mobile terminal, a center of first circle is a location of the routing device, and a radius of the first circle is the first distance; and

    determining at least one second distance between the routing device and the at least one intelligent device based on the at least one second RSSI information and determining at least one third distance between the mobile terminal and the at least one intelligent device based on the at least one third RSSI information;

    wherein at least two intersections of at least one second circle and at least one third circle are possible locations of the at least one intelligent device, a center of each second circle is a location of the routing device, a radius of each second circle is the second distance, a center of each third circle is a location of the mobile terminal and a radius of the third circle is the third distance.

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