Positioning systems and methods for determining the location of a mobile communication device
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, said determined cell being served by a base station connected to a set of radio heads, wherein each one of the radio heads included in said set of radio heads is connected to the base station via a cable, and one of said radio heads included in said set is serving the MCD;
calculating a cable loss value (L_cable) representative of signal attenuation caused by the cable connecting the serving radio head to the base station; and
determining the location of the MCD based on L_cable, whereincalculating L_cable comprises;
determining an uplink path loss value (L_ul) representative of the uplink path loss between the MCD and the serving radio head,receiving a power measurement report comprising an uplink transmit power value (P_ul_mcd) indicating the transmit power of an uplink signal transmitted by the MCD,obtaining an amplifier gain value (G_amp) representing the gain of an uplink amplifier of the serving radio head,at least one of (a) obtaining a power value (P_ul_mcd_du) representative of the power of said uplink signal transmitted by the MCD as measured by the base station or (b) obtaining the following values;
i) a signal to noise and interference ratio of the MCD (SINR_mcd_du) as measured by a digital unit of the base station, ii) an inter-cell interference value (I_du), iii) a thermal noise power value (N0), and iv) a noise factor of a radio unit of the base station (NF_ru), andcalculating the L_cable comprises calculating at least one of;
P_ul_mcd−
L_ul+G_amp+P_ul_mcd_du or P_ul_mcd−
L_ul+G_amp−
(SINR_mcd_du+I_du+N0+NF_ru).
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Abstract
A localization approach based on cable length detection. In one aspect, a method performed by a positioning system for determining the location of a mobile communication device (MCD) is provided. In some embodiments, the method includes the positioning system determining a cable length value representative of the length of the cable connecting a base station to a radio head serving the MCD. The positioning system then determines a location of the MCD based on the determined cable length.
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Citations
11 Claims
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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:
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determining a cell in which the MCD is located, said determined cell being served by a base station connected to a set of radio heads, wherein each one of the radio heads included in said set of radio heads is connected to the base station via a cable, and one of said radio heads included in said set is serving the MCD; calculating a cable loss value (L_cable) representative of signal attenuation caused by the cable connecting the serving radio head to the base station; and determining the location of the MCD based on L_cable, wherein calculating L_cable comprises; determining an uplink path loss value (L_ul) representative of the uplink path loss between the MCD and the serving radio head, receiving a power measurement report comprising an uplink transmit power value (P_ul_mcd) indicating the transmit power of an uplink signal transmitted by the MCD, obtaining an amplifier gain value (G_amp) representing the gain of an uplink amplifier of the serving radio head, at least one of (a) obtaining a power value (P_ul_mcd_du) representative of the power of said uplink signal transmitted by the MCD as measured by the base station or (b) obtaining the following values;
i) a signal to noise and interference ratio of the MCD (SINR_mcd_du) as measured by a digital unit of the base station, ii) an inter-cell interference value (I_du), iii) a thermal noise power value (N0), and iv) a noise factor of a radio unit of the base station (NF_ru), andcalculating the L_cable comprises calculating at least one of;
P_ul_mcd−
L_ul+G_amp+P_ul_mcd_du or P_ul_mcd−
L_ul+G_amp−
(SINR_mcd_du+I_du+N0+NF_ru). - View Dependent Claims (2, 3, 4, 5, 6)
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7. A positioning system for determining a location of a mobile communication device (MCD), said positioning system comprising one or more of:
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a positioning node; and a base station connected to a set of radio heads, wherein each one of the radio heads included in said set of radio heads is connected to the base station via a cable, and one of said radio heads included in said set is serving the MCD the positioning system is configured to; determine a cell in which the MCD is located, said determined cell being served by the base station; calculate a cable loss value (L_cable) representative of signal attenuation caused by the cable connecting the serving radio head to the base station; and determine the location of the MCD based on L_cable, wherein calculate the L_cable comprises; determining an uplink path loss value (L_ul) representative of the uplink path loss between the MCD and the serving radio head; obtaining an uplink transmit power value (P_ul_mcd) indicating the transmit power of an uplink signal transmitted by the MCD; obtaining an amplifier gain value (G_amp) representing the gain of an uplink amplifier of the serving radio head; at least one of (a) obtaining a power value (P_ul_mcd_du) representative of the power of said uplink signal transmitted by the MCD as measured by the base station or (b) obtaining the following values;
i) a signal to noise and interference ratio of the MCD (SINR_mcd_du) as measured by a digital unit of the base station, ii) an inter-cell interference value (I_du), iii) a thermal noise power value (N0), and iv) a noise factor of a radio unit of the base station (NF_ru); andcalculate L cable by calculating at least one of;
P_ul_mcd−
L_ul+G_amp−
P_ul_mcd_du or P_ul_mcd−
L_ul+G_amp−
(SINR_mcd_du+I_du+N0+NF_ru). - View Dependent Claims (8, 9, 10, 11)
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Specification