Handover support method using dedicated ranging code

摘要: The present invention discloses a variety of methods supporting handover in wireless access system. A support method according to an embodiment the includes steps of: transmitting request message first base station (serving station); receiving response (UL grant or UL-MAP message) containing authentication information (M) from second (target deriving dedicated code index (DCI) for instructing ranging by using (M); on non-contention basis; and as code.