Method for computing current time on a cellular mobile system

Details Method for computing current time on a cellular mobile system Method for computing current time on a cellular mobile system

1997-09-02

1999-07-06

Bost, Dwayne D.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455432, 455566, 368 21, H04Q 720

Patent

active

059208244

ABSTRACT:
A method is disclosed for computing the local time and date of a mobile computer, when a user has traveled to a time zone different from his or her home time zone is disclosed. A system identification number is received through a cellular transceiver which is associated with an antenna. The system identification number is received by the mobile computer through a cellular modem. A database is provided within the mobile computer listing all of the system identification numbers throughout the North American Cellular Network. The database also provides the geographic location and time zone for each system identification number. Also listed in the database is information whether daylight savings time is observed in the geographic location associated with the system identification number. The computer, upon receiving a system identification number, searches the database for the same identification number. If a match is found, the computer obtains the relevant information and calculates the current local system time from the home system time previously stored in the computer. If no match is found, the user has the option to update the database, to include the new system identification number.

REFERENCES:
patent: 5020091 (1991-05-01), Krolopp et al.
patent: 5159625 (1992-10-01), Zicker
patent: 5309500 (1994-05-01), Koma et al.
patent: 5375104 (1994-12-01), Ishii et al.
patent: 5590092 (1996-12-01), Fehnel
patent: 5655218 (1997-08-01), Smolinske

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