Method for ranging in mobile communication system using orthogonal frequency division multiple access scheme

The present invention relates to a ranging method for preventing minimize the access delay of the subscriber station, and a ranging code collision in a wireless communication system, this invention is the ranging slots and ranging codes for each of the ranging in a wireless communication system including at least one or more subscriber terminals step of in response to the initial ranging request channel in the state performing the initial ranging process and, if successful, the initial ranging transition the null in the state to idle state and the If in response to the bandwidth request ranging request transition to the connected state from the idle state, and wherein the connection step of performing a bandwidth request ranging by the random access method in the state, and the random access system bandwidth request ranging songgong the connection state and the process of transition to a busy state in, If the bandwidth request lane process in response to the ranging request performs the bandwidth request ranging as scheduled access scheme, the bandwidth requirements for the scheduled access schemes ranging from the busy state succeeds and transmits the data, and the data transmitted in the busy state When the process is terminated and, features corresponding to the hold state in the bandwidth request ranging request performs the bandwidth request ranging by the scheduled connection mode transitions to the hold state. Scheduled access scheme, the random access scheme, the ranging code, ranging slot