Optimized system selection using location estimation

摘要

A current location of a mobile system in a wireless network can be determined by using information provided by a base station in communication with the mobile system. The information can include a system identifier (SID) table and a local time offset (LTM_OFF) value and a daylight savings time (DAYLT) value. The SID table is used to provide a mobile country code (MCC) associated with a country in which the mobile device is located. The LTM_OFF value is used to provide a range of longitude values in which the mobile device is located. The current location of the mobile device is based upon at least the range of longitude values and the current country. The current location is used to build an optimized scan list that is used, in turn, to identify and acquire access to the preferred system by a mobile device.

主权项

1. A method, comprising:
receiving, at a mobile system, a message from a base station, the message including a system identifier (SID) and time information that identifies the base station; estimating a first location of the mobile system based on the time information, the estimated location identifying a location within a country; using the estimated first location to identify a preferred system; acquiring service associated with the preferred systems; associating the acquired service with a geographical region in a locate table, wherein the geographical region is further associated with a range of geographic coordinates; subsequent to the estimating of the first location, estimating a second location of the mobile system, wherein the second location is outside of the range of geographic coordinates; and updating the range associated with the geographical region to include the second location.