Patent ID: 6400750
Filing Date: 2002-06-04
Classification: H04L

Abstract:
A base station system of a multicarrier method, comprising:a base station control apparatus connecting with an exchange; a pilot signal modulation apparatus for generating a spread spectrum modulated pilot signals as many as the number of carriers in accordance with a control of the base station control apparatus; a paging signal modulation apparatus for generating a spread spectrum modulated paging signals as many as the number of carriers in accordance with a control of the base station control apparatus; a plurality of traffic signal modulation apparatuses, each of which generates a spread spectrum modulated traffic signals as many as the number of carriers in accordance with a control of the base station control apparatus; a plurality of combiners as many as the number of the carriers for combining input signals from the modulation apparatuses; and a radio frequency transmission apparatus for modulating the outputs from the combiners into multiple radio frequencies and transmitting the same, wherein said base station control apparatus determines the modulation mode in accordance with the number of mobile stations in a cell, and the determined modulation mode is contained into the paging signal and then is transmitted, and the traffic signal modulation apparatus is controlled in accordance with the determined modulation mode, and wherein said traffic signal modulation apparatus symbol-repeats the user data bits for a predetermined time in accordance with the modulation mode determined by the base station control apparatus and the radio frequency transmission apparatus modulates a plurality of carriers using a traffic spread spectrum signal obtained by multiplying the symbol-repeated, serial/parallel-converted user data bits as many as the carriers and the traffic pseudo noise code.