DGNSS CORRECTION FOR POSITIONING
First Claim
1. A method of performing positioning, comprising:
- obtaining a user differential range error (UDRE) and a UDRE growth rate for each of at least one satellite; and
deriving a location estimate for a terminal based on the UDRE and the UDRE growth rate for each of the at least one satellite.
1 Assignment
0 Petitions
Accused Products
Abstract
Techniques for supporting positioning with differential corrections are described. In an aspect, differential correction for a satellite may include (i) a user differential range error (UDRE) indicating an uncertainty in a pseudo-range correction for the satellite, (ii) a UDRE growth rate, which may be a scaling factor for the UDRE, and (iii) a time of validity for UDRE growth rate, which may be a time unit used to apply the scaling factor. In one design, a terminal may send a request message to ask for differential correction information and may receive a response message. The terminal may obtain differential correction (e.g., a UDRE, a UDRE growth rate, and a time of validity for UDRE growth rate) for each of at least one satellite from the response message. The terminal may derive a location estimate for itself based on the differential correction for each satellite.
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Citations
28 Claims
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1. A method of performing positioning, comprising:
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obtaining a user differential range error (UDRE) and a UDRE growth rate for each of at least one satellite; and deriving a location estimate for a terminal based on the UDRE and the UDRE growth rate for each of the at least one satellite. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for performing positioning, comprising:
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means for obtaining a user differential range error (UDRE) and a UDRE growth rate for each of at least one satellite; and means for deriving a location estimate for a terminal based on the UDRE and the UDRE growth rate for each of the at least one satellite. - View Dependent Claims (11, 12, 13, 14)
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15. An apparatus for performing positioning, comprising:
at least one processing unit configured to obtain a user differential range error (UDRE) and a UDRE growth rate for each of at least one satellite, and to derive a location estimate for a terminal based on the UDRE and the UDRE growth rate for each of the at least one satellite. - View Dependent Claims (16, 17, 18, 19)
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20. A computer program product, comprising:
a computer-readable medium comprising; code to cause at least one computer to obtain a user differential range error (UDRE) and a UDRE growth rate for each of at least one satellite, and code to cause the at least one computer to derive a location estimate for a terminal based on the UDRE and the UDRE growth rate for each of the at least one satellite.
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21. A method of supporting positioning, comprising:
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determining a user differential range error (UDRE) and a UDRE growth rate for each of at least one satellite; and providing the UDRE and the UDRE growth rate for each of the at least one satellite as an aid for positioning. - View Dependent Claims (22, 23, 24)
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25. An apparatus for supporting positioning, comprising:
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means for determining a user differential range error (UDRE) and a UDRE growth rate for each of at least one satellite; and means for providing the UDRE and the UDRE growth rate for each of the at least one satellite as an aid for positioning. - View Dependent Claims (26, 27, 28)
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Specification