Patent ID: 7545789

Claim:
A method of mobile communication by determining schedules for transmitting and receiving data, and transmitting and receiving data between a base station and a plurality of mobile terminals according to said schedules, the method comprising the steps of: transmitting particular orthogonal codes from the mobile terminals to the base station as alert signals indicating the presence of data to be transmitted, checking, at the base station, whether the particular orthogonal codes are contained in the alert signals transmitted from the mobile terminals to the base station, and when the particular orthogonal codes are detected in the alert signals transmitted from the mobile terminals to the base station, transmitting, by the base station, data representing said detected orthogonal codes and the schedules, for transmitting the data from the mobile terminals to the base station, to the mobile terminals as an alert response to said alert signals, and when the data representing the orthogonal codes used for said alert signals transmitted from the mobile terminals to the base station are contained in said alert response transmitted from the base station to the mobile terminals, reading out the data transmission schedules in said alert response at the mobile terminals and transmitting the data from the mobile terminals to the base station according said schedules that are read out.