Mobile communication terminal having a radio frequency calibration data recovering function and a method of backing up and restoring calibration data
US7856231B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2006 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Oct 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/22
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mobile communication terminal, and a method of backing up and restoring calibration data thereof disclosed, thereby enabling a terminal to repair damage to radio frequency calibration data. The present invention includes a radio frequency calibration data checking unit comparing a checksum value of radio frequency calibration data stored in an internal terminal memory to a checksum of backup data value stored in a SIM card according when the terminal is turned on, the radio frequency calibration data checking unit determining whether the radio frequency calibration data stored in memory is the same as the data stored on the SIM radio frequency calibration data recovering unit for restoring the radio frequency calibration data from the SIM card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.