METHOD AND APPARATUS FOR EFFICIENT FAST RANGING SUPPORTING FAST HANDOVER IN MOBILE BROADBAND WIRELESS ACCESS SYSTEM

摘要

The present invention relates to an efficient fast ranging support apparatus and method for fast handover in a mobile broadband wireless access system. The present invention relates to a mobile subscriber station and a base station and a handover method in a mobile broadband wireless access communication system. When the serving base station performs a series of handover procedures between the target base stations, and the serving base station transmits a MOB_HO_RSP message for the MOB_MSSHO_REQ to the mobile subscriber station, the mobile subscriber station performing the handover determines the final target base station as the target base station, Thereafter transmitting a MOB_HO-IND message to a serving base station; transmitting a HO-command message to a final target base station included in the MOB_HO-IND message when the serving base station receives the MOB_HO-IND message; Final target base station receiving HO-command message Assigning Fast_Ranging_IE to the mobile subscriber station based on the handover time information of the mobile subscriber station included in the message, transmitting a RNG-REQ through the allocated ranging region, and receiving a RNG-RSP. And performing an uplink ranging procedure with the base station.