METHOD AND A SYSTEM FOR CHANGING A CYCLIC PREFIX LENGTH IN A WIRELESS COMMUNICATION SYSTEM, CAPABLE OF EFFECTIVELY OBTAINING SYMBOL SYNCHRONIZATION BY NOTIFYING A LENGTH OF A CYCLIC PREFIX FROM BASE STATION TO A TERMINAL IN ADVANCE

摘要

PURPOSE: A method and a system for changing a cyclic prefix length in a wireless communication system are provided to flexibly change the length of an cyclic prefix according to a channel state, thereby maintaining stable connection.;CONSTITUTION: A BS periodically detects channel state during transmission and reception of data(400). The BS determines the necessity of change of currently set cyclic prefix length(405). The BS sets length change information to 1(410). The BS sets the CP length change information to 0(415). The BS generates similar random sequence(420). The BS transmits a downlink reference signal(425). The downlink reference signal comprises the CP length change information.;COPYRIGHT KIPO 2010