Patent ID: 7126527

Claim:
A system comprising: a plurality of base stations, each base station comprising: a positioning receiver to generate base station location information, each positioning receiver having a known location, and a link to a network to transmit said base station location information; a station selection module to select a subset of the plurality of base stations based at least in part on each base station of the subset utilizing a set of satellites that is also utilized by a mobile device; and a correction information calculation module coupled to the network to receive base station location information from each base station of the subset via the network, the correction information calculation module to calculate correction information as a function of the received base station location information and the known location for each base stations of the subset, wherein the correction information calculation module includes: an integrity monitoring module to monitor the received base station location information and to prevent received base station location information that has been corrupted from being used by the correction information calculation module, and a measurements integration module to stochastically integrate non-corrupted base station location information to derive said correction information.