| 摘要 |
Methods, program products, and systems for location determination using cached location area codes are described. A server computer can receive location information from location-aware mobile devices (e.g., GPS-enabled devices) located in a location area of a cellular communications network. The server computer can also receive from the mobile device the location area code associated with the location area in which the mobile devices are located. The server computer can estimate a coarse geographic location of the location area, as well as a number of cells encompassed by the location area using the received information. The server computer can store the estimated geographic locations associated with sufficiently large location areas (e.g., location areas having more than a certain number of cells). The server computer can provide the stored geographic locations to second mobile devices that are not GPS-enabled for estimating current locations of the second mobile devices. |
