Method of controlling intersystem hand-off by subtracting margin value from pilot signal strength of other system

   
   

A CDMA mobile communication system carries out a method of controlling an intersystem hand-off by subtracting a margin value from a pilot signal strength of another system. A detector detects information in a report from the mobile station, representing the signal strength of the pilot signal from the base station. A changer subtracts a corresponding margin value from the detected pilot signal strength, thereby changing the pilot signal strength. The executing unit executes an intersystem hand-off to the other system if the pilot signal strength changed by the changing means exceeds a predetermined threshold value.

 
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