In an initial access method and apparatus between a mobile communication system terminal and the network node, the method comprising: a first transmitter and transmitting a synchronization message comprising a preamble and a data corresponding from the second transceiver to the preamble and characterized in that it comprises the step of transmitting comprising the steps of: receiving a response message including the temporary identifier and a corresponding scheduling request message coded as a code to the temporary ID or the temporary ID is added a scheduling request message to the second transceiver It shall be. Initial Access Procedure, C-RNTI, UE Scrambling Code, Timer, C-RNTI Validity