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Positioning systems and methods for determining the location of a mobile communication device

  • US 10,051,424 B2
  • Filed: 06/22/2015
  • Issued: 08/14/2018
  • Est. Priority Date: 01/27/2015
  • Status: Active Grant
First Claim
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1. A method performed by a positioning system for determining a location of a mobile communication device (MCD), the method comprising:

  • determining a cell in which the MCD is located, the determined cell being served by a serving base station connected to a set of radio heads, wherein each one of the radio heads included in the set of radio heads is connected to the serving base station via a cable;

    determining a cable length value representative of the length of a cable connecting the serving base station to a radio head serving the MCD; and

    using the determined cable length value representing the length of the cable connecting the serving base station to the radio head serving the MCD to obtain location information for the MCD, whereinthe step of determining the cable length value representing the length of the cable connecting the serving base station to the radio head serving the MCD comprises;

    a positioning node of the positioning system receiving a message transmitted by the serving base station, the message comprising a set of one or more parameters enabling the positioning node to calculate a cable loss value (L_cable) of the cable connecting the serving base station to the radio head serving the MCD, the set of parameters comprising one or more of;

    i) a power value representative of the power of an uplink signal transmitted by the MCD as measured by the serving base station (P_ul_mcd_du) and ii) a signal to noise and interference ratio (SINR) as measured by the serving base station;

    the positioning node using the received set of parameters to calculate the cable loss value of the cable connecting the serving base station to the radio head serving the MCD; and

    the positioning node determining the cable length value representing the length of the cable connecting the serving base station to the radio head serving the MCD using the calculated cable loss value.

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