The mannered null 1st radio communication mode which is changed to 2nd radio communication mode from 1st radio communication mode in

摘要

PROBLEM TO BE SOLVED: To provide a method for switching from first radio communication mode to second radio communication mode and a related multimode mobile terminal.;SOLUTION: The method for switching from first radio communication mode to second radio communication mode in a multimode radio communication mobile terminal comprising first and second units provided with first and second clocks U1 and U2 and operating according to first or second radio access technology RAT comprises a step for locking the first unit of mobile terminal to the first mode of radio communication by the first clock, a step for calculating the time shift Δt between clocks of two radio communication modes by the mobile terminal, a step for correcting the time of the second unit of terminal based on the calculated time shift, and a step for switching the second unit of mobile terminal to the second mode of radio communication by a related second clock.;COPYRIGHT: (C)2003,JPO