Patent 7917157 was granted and assigned to Nokia on March, 2011 by the United States Patent and Trademark Office.
There is disclosed a method of providing location information in a mobile communication system, comprising the steps of: receiving a request for a current location of a mobile station; determining a time at which a last known location of the mobile station was determined; comparing the time to a threshold time limit; and providing, as the current location, the last known location if the time is within the threshold time limit.