Communication control method for requesting priority data

A communication control method between a base station and first and second mobile machines when said second mobile machine requests communication of priority data with said base station while said first mobile machine conducts communication of non-priority data with said base station, comprising the steps in said base station of:

• transmitting wait information to said first mobile machine by using a first down link control channel to control said first mobile machine to a waiting state and allocating said first down link control channel to said second mobile machine to control said second mobile machine to conduct the communication of the priority data;
• and
• when a second down link control channel different from said first down link control channel is idle, transmitting slot movement information to said waiting first mobile machine by using said first down link control channel;
• wherein when said waiting first mobile machine receives the slot movement information, said first mobile machine resumes the communication of the non-priority data in a next frame by using said second down link control channel.