Method of locating a mobile station based on observed time difference
First Claim
1. A method of locating a mobile station in a telecommunications network having at least a first network operator having a plurality of first base stations and a second network operator having a plurality of second base stations, said method using measurement information related to arrival of signals transmitted from the first and second base stations to the mobile station for obtaining the location thereof based on observed time difference, said method comprising the steps of:
- acquiring (120) the measurement information of at least one second base station and the measurement information of one or more first base stations when the measurement information of the first base stations alone is insufficient for location calculation; and
calculating (118) the location of the mobile station based on the acquired measurement information.
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Abstract
An E-OTD method for locating a mobile station using measurement information related to arrival of signals transmitted from base stations of different operators for obtaining the base station locations. When one operator does not have enough base stations for providing measurement information for location calculation, the SMLC of that operator acquires measurement information of base stations from at least one other operator using SMLC-SLMC communication protocol.
87 Citations
16 Claims
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1. A method of locating a mobile station in a telecommunications network having at least a first network operator having a plurality of first base stations and a second network operator having a plurality of second base stations, said method using measurement information related to arrival of signals transmitted from the first and second base stations to the mobile station for obtaining the location thereof based on observed time difference, said method comprising the steps of:
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acquiring (120) the measurement information of at least one second base station and the measurement information of one or more first base stations when the measurement information of the first base stations alone is insufficient for location calculation; and
calculating (118) the location of the mobile station based on the acquired measurement information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification