Enhanced database information for urban navigation
First Claim
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1. A method for use in at least one electronic device, the method comprising:
- with said at least one electronic device;
accessing a satellite signal visibility mask for at least one satellite enabled to transmit an RF signal;
establishing an enhanced database for at least a plurality of point locations based, at least in part, on said satellite signal visibility mask;
providing at least a portion of said enhanced database to at least one mobile device; and
wherein said signal visibility mask for each of said plurality of point locations comprises a mask function to establish an expected azimuth/elevation mask for at least one of a potential line-of-sight (LOS) signal reception, and/or a potential non-line-of-sight (NLOS) signal reception.
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Abstract
Methods and apparatus are provided for estimating position location of a mobile device.
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Citations
26 Claims
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1. A method for use in at least one electronic device, the method comprising:
with said at least one electronic device; accessing a satellite signal visibility mask for at least one satellite enabled to transmit an RF signal; establishing an enhanced database for at least a plurality of point locations based, at least in part, on said satellite signal visibility mask; providing at least a portion of said enhanced database to at least one mobile device; and wherein said signal visibility mask for each of said plurality of point locations comprises a mask function to establish an expected azimuth/elevation mask for at least one of a potential line-of-sight (LOS) signal reception, and/or a potential non-line-of-sight (NLOS) signal reception. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for use in at least one electronic device, the method comprising:
with said at least one electronic device; establishing a signal visibility mask for each of a plurality of point locations geographically distributed within at least one open area portion of a region based, at least in part, on at least a portion of three-dimensional geographical database; accessing said satellite signal visibility mask for at least one satellite enabled to transmit an RF signal; establishing an enhanced database for at least said plurality of point locations based, at least in part, on said satellite signal visibility mask; and providing at least a portion of said enhanced database to at least one mobile device. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
Specification