TRANSMITTING METHOD OF RANDOM ACCESS PREAMBLE

摘要

A random access preamble transmission method is provided to enable an MS(Mobile Station) to send a random access preamble by selecting one of antennas according to a downlink channel state, thereby reducing delay time occurring when the random access preamble is transmitted. An MS receives a BCH(Broadcasting Channel) signal periodically transmitted from a base station(S100). The MS measures received power for each of two antennas(S101). The MS determines an antenna having high received power as a random access preamble transmission antenna(S102). The MS determines received power of the MS(S103). The MS determines random access preamble transmission power by using an open loop power control method(S104). The MS transmits a random access preamble of the determined transmission power by using the determined transmission antenna(S105).