CPC G01S 5/0246 (2020.05) [G01C 21/3815 (2020.08); G01S 5/0236 (2013.01); G01S 5/0244 (2020.05); G01S 5/0257 (2013.01); G01S 5/0284 (2013.01); G01S 5/02524 (2020.05); G06F 18/21342 (2023.01); G06F 18/2415 (2023.01); H04B 17/327 (2015.01); H04W 64/003 (2013.01)] | 14 Claims |
1. A method performed in a mobile device, the method comprising:
receiving, from a base station almanac (BSA) associated with a network server, observed time difference of arrival (OTDOA) assistance data for a first plurality of cells;
storing, within a memory of the mobile device, the OTDOA assistance data as a first micro-BSA;
determining a first position estimate for the mobile device based on time difference of arrival (TDOA) measurements associated with a subset of the first plurality of cells and initial OTDOA assistance data corresponding to the subset of the first plurality of cells;
predicting an expected route to be traveled by the mobile device based at least in part on the first position estimate;
receiving, from the BSA associated with the network server, OTDOA assistance data for a second plurality of cells, the second plurality of cells being proximate to the expected route to be traveled by the mobile device and including at least one cell not included within the first plurality of cells; and
determining a second position estimate based at least in part on second OTDOA assistance data corresponding to a subset of the second plurality of cells.
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