APPARATUS AND METHOD FOR TRANSMITTING DATA TRAFFIC CHANNEL IN MOBILE COMMUNICATION SYSTEM

摘要

PURPOSE: An apparatus and method for transmitting a data traffic channel in a mobile communication system is provided to transmit additional control information to a preamble channel used for only user classification in an 1xEV-DV system for simultaneously transmitting fast packet data and voices. CONSTITUTION: An index grouping table(304) stores Walsh functions and packet control information indexes about the Walsh functions in a table mapped according to the number of packet control information. A control unit(303) selects the packet control information indexes according to packet control information from the index grouping table(304) and determines a bidirectional Walsh function about an in-phase channel and a quadrature-phase channel according to the selected indexed when receiving user information of a specific user and packet control information. A spreading unit(302) receives a mapped preamble signal, converts the received preamble signal into an in-phase channel signal and a quadrature-phase channel signal, spreads the in-phase channel signal and the quadrature-phase channel signal to a signal according to the determined packet control information indexes, and transmits the preamble signal through a complex PN(Pseudo Noise) spreading unit(305) and an RF(Radio Frequency) unit(315).