| 摘要 |
<p>A mobile terminal 11 and a base station 12 use a first communication channel (i.e. a transmission route 21) to conduct communication relating to a first call. A first time (i.e. switching time) and a second time (i.e. switching-back time) during the communication are determined, and when the switching time is reached, communication using transmission route 21 is ceased and attempts are made to establish spreading code synchronization in order for mobile terminal 11 and base station 12 to commence using a second communication channel (i.e. a transmission route 22) to conduct communication relating to both the first call and a second call. If synchronization cannot be established before the switching-back time is reached, attempts to establish synchronization are ceased, and mobile terminal 11 and base station 12 recommence using transmission route 21 to conduct communication. <IMAGE> <IMAGE></p> |
