Patent ID: 8144662

Claim:
A method of maintaining frequency offset and timing information during neighbor list updates, comprising the steps of: acquiring, by a device, a frequency offset and a timing information of each of a first plurality of GSM neighbor cells; recording an identity, the frequency offset and the timing information of each of the first plurality of GSM neighbor cells and keeping the frequency offset and the timing information for a time period T in a record; receiving a list of a second plurality of GSM neighbor cells; comparing an identity of each of the second plurality of GSM neighbor cells with the identity of each of the first plurality of GSM cells in the record; if a GSM neighbor cell from the second plurality of GSM neighbor cells is not in the record, gathering frequency offset and timing information pertaining to the GSM neighbor cell; and if at least one GSM neighbor cell from the second plurality of GSM neighbor cells is in the record, determining if an age of the frequency offset and timing information pertaining to the at least one GSM neighbor cell is less than the time period T and if the age is less than the time period T, locating the at least one GSM neighbor cell using the corresponding recorded ones of the frequency offset and the timing information.