Invention Grant
- Patent Title: Automated cellular telephone clock setting
- Patent Title (中): 自动蜂窝电话时钟设置
-
Application No.: US09785799Application Date: 2001-02-16
-
Publication No.: US06826416B2Publication Date: 2004-11-30
- Inventor: David Anson , Alan W. Shen , Scott R. Shell , Roman Sherman
- Applicant: David Anson , Alan W. Shen , Scott R. Shell , Roman Sherman
- Main IPC: H04M100
- IPC: H04M100

Abstract:
A cellular telephone clock is automatically set to correlate to a timestamp contained in a Short Messaging Service (SMS) status report. Accordingly, an exemplary cell phone clock can be properly set any time the cell phone receives a status report. By setting the cell phone device time to correlate to the world time, the exemplary cell phone clock can be automatically set, without requiring any action by the user and without requiring a special time set control message. When the cell phone transmits an SMS message, the cell phone stores the device time corresponding to the time that the message was sent (DTS). When a status report is received, the exemplary cell phone stores the device time corresponding to the time that the status report was received (DTR). Additionally, the cell phone stores the world time that is included in the status report by the SMSC that handled the message (WT). By subtracting the DTR from the WT, the cell phone can determine an approximate difference between the cell phone's device time (and clock) and the world time. By adding this difference to the current device time (DTC), the DTC can be set to closely approximate the WT.
Public/Granted literature
- US20040072595A1 Automated cellular telephone clock setting Public/Granted day:2004-04-15
Information query