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Node localization method and device

  • US 10,356,744 B2
  • Filed: 04/23/2018
  • Issued: 07/16/2019
  • Est. Priority Date: 10/23/2015
  • Status: Active Grant
First Claim
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1. A node localization method, comprising:

  • storing information regarding one or more radio signals received by at least one known-location node, wherein the information indicates a location of the at least one known-location node;

    storing information regarding one or more radio signals received by a to-be-positioned node, wherein the one or more radio signals received by the at least one known-location node and the one or more radio signals received by the to-be-positioned node include radio signals transmitted by at least one common node such that the at least one common node transmits the radio signals to both the at least one known-location node and the to-be positioned node;

    determining a first set of measurement values for the one or more radio signals received by at least one known-location node;

    determining a second set of measurement values for the one or more radio signals received by a to-be-positioned node;

    determining correspondences between the measurement values in the first set and in the second set such that a measurement value for a first given radio signal in the first set is determined to correspond to a measurement value for a second given radio signal in the second set by virtue of the first given radio signal and the second given radio signal are transmitted by the at least one common node;

    determining, based on the measurement values in the first set and in the second set, according to the correspondences between the radio signal measurement values in the first set and in the second set, a weighting coefficient corresponding to each of the at least one known-location node; and

    determining location information of the to-be-positioned node according to the weighting coefficient corresponding to each of the known-location node and the location of the each of the at least one known-location node; and

    , wherein the method further comprises;

    performing, by using the weighting coefficient corresponding to each of the at least one known-location node, according to a radio signal sent by the at least one common node, weighted summation on the radio signal measurement values in the first set corresponding to each of the at least one known-location node, wherein a result of the weighted summation approximates the radio signal measurement values that are comprised in the second set and that are determined according to the radio signal sent by the at least one common node.

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