Patent ID: 8620393

Claim:
A method comprising: defining a geofence center and a geofence boundary; receiving geofence network information associated with an area defined by the geofence boundary; obtaining mobile station network information; determining whether the mobile station network information identifies a cell at least partially within the geofence boundary; performing an operation when the mobile station network information does not identify a cell at least partially within the geofence boundary, the operation comprising: incrementing a skip counter, wherein the skip counter is configured to count a number of times that the mobile station network information does not identify a cell at least partially within the geofence boundary; determining whether the skip counter exceeds a threshold representative of a maximum number of consecutive times a mobile station device obtaining the mobile station network information is determined to not be at least partially within the geofence boundary before performing calculations to obtain a pseudorange-based low Quality of Service (QoS) position fix using a first set of parameters; in response to determining that the skip counter does not exceed the threshold, performing a second operation; and in response to determining that the skip counter exceeds the threshold, performing operations to calculate a position fix using the first set of parameters.