Selection of location measurement units for determining the position of a mobile communication station
First Claim
1. A method of selecting location measurement units for measuring an uplink signal transmitted by a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, comprising:
- determining a geographic area of the network in which the mobile station is possibly located;
identifying a first position within the area;
determining relative positional relationships between the first position and a plurality of further positions respectively associated with a plurality of location measurement units in the network; and
choosing a subset of the plurality of location measurement units for measuring the uplink signal based on the relative positional relationships.
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Accused Products
Abstract
In selecting location measurement units for measuring an uplink signal received from a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, a possible position of the mobile station in the network is identified. The location measurement units to be used in measuring the uplink signal can then be identified by evaluating one or more of relative positional relationships between the possible position of the mobile station and a plurality of further positions respectively associated with a plurality of location measurement units in the network; path loss measures predicted for each of a plurality of location measurement units relative to the possible position of the mobile station; and geometric dilution of precision (GDOP) values determined for each of a plurality of groups of location measurement units with respect to the possible position of the mobile station.
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Citations
27 Claims
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1. A method of selecting location measurement units for measuring an uplink signal transmitted by a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, comprising:
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determining a geographic area of the network in which the mobile station is possibly located;
identifying a first position within the area;
determining relative positional relationships between the first position and a plurality of further positions respectively associated with a plurality of location measurement units in the network; and
choosing a subset of the plurality of location measurement units for measuring the uplink signal based on the relative positional relationships. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of selecting location measurement units for measuring an uplink signal transmitted by a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, comprising:
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identifying a possible position of the mobile station in the network;
predicting for each of a plurality of location measurement units in the network a respective path loss measure relative to the possible position of the mobile station; and
choosing a subset of the plurality of location measurement units to measure the uplink signal based on the path loss measures. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of selecting location measurement units for measuring an uplink signal received from a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, comprising:
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identifying a possible position of the mobile station in the network;
determining for each of a plurality of groups of location measurement units in the network a geometric dilution of precision (GDOP) value with respect to the possible position of the mobile station; and
selecting one of the groups of location measurement units based on the GDOP values. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An apparatus for selecting location measurement units for measuring an uplink signal received from a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, comprising:
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a first determiner having an input for receiving network information from which can be determined a geographic area of the network in which the mobile station is possibly located, said first determiner responsive to said network information for determining said geographic area and identifying a first position therein;
a second determiner coupled to said first determiner for receiving therefrom position information indicative of said first position, said second determiner having an input for receiving further network information indicative of positioning of a plurality of location measurement units in the network, said second determiner responsive to said position information and said further network information for determining relative positional relationships between said first position and a plurality of further positions respectively associated with said plurality of location measurement units; and
a selector coupled to said second determiner for receiving therefrom positional relationship information indicative of said relative positional relationships, said selector responsive to said positional relationship information for selecting from said plurality of location measurement units a subset of location measurement units for measuring the uplink signal. - View Dependent Claims (21, 22, 23)
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24. An apparatus for selecting location measurement units for measuring an uplink signal received from a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, comprising:
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a path loss determiner having an input for receiving network information from which can be determined a possible position of the mobile station in the network, said network information further indicative of positioning of a plurality of location measurement units in the network, said path loss determiner responsive to said network information for identifying a possible position of the mobile station in the network, said path loss determiner further responsive to said network information for predicting, for each of said plurality of location measurement units, a respective path loss measure relative to said possible position of the mobile station; and
a selector coupled to said path loss determiner for receiving therefrom path loss information indicative of said path loss measures, said selector responsive to said path loss information for selecting from said plurality of location measurement units a subset of location measurement units to measure the uplink signal. - View Dependent Claims (25)
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26. An apparatus for selecting location measurement units for measuring an uplink signal received from a mobile communication station operating in a wireless communication network in order to locate the position of the mobile communication station in the wireless communication network, comprising:
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a determiner for receiving network information from which can be determined a possible position of the mobile station in the network, said network information further indicative of positioning of a plurality of location measurement units in the network, said determiner responsive to said network information for identifying a possible position of the mobile station in the network, and said determiner further responsive to said network information for determining, for each of a plurality of groups of said location measurement units, a geometric dilution of precision (GDOP) value with respect to said possible position of the mobile station; and
a selector coupled to said determiner for receiving therefrom GDOP information indicative of said GDOP values, said selector responsive to said GDOP information for selecting one of said groups of location measurement units to measure the uplink signal. - View Dependent Claims (27)
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Specification