Hand-off method in a mobile broadband wireless access system

The present invention provides a way to reduce the handoff time relates to a handoff method in an IEEE 802.16e system. As a method, the subscriber station and the first base station and a handoff method of the mobile station in a mobile broadband wireless access system including a target BS adjacent to the first base station for performing the mobile station and data communication according to the present invention, the MS and transmitting a scanning request message to check the channel condition with the target base station to the first base station when a handoff is required while performing the first base station and in communication with said first base station is scanned from the terminal the process of granting a scan when a request message is received, and transmits a response message for it, and the user terminal generates a report power by checking the channel state with the base station a message existing in the Naver list of the mobile station of the target base station including by the step of transmitting to the first base station and said first base station reports the power message The process and the target base station the above to generate a response message including the allocated resource, information during a handoff request message to be transmitted to the target base station, the handoff request message to check the availability of a handoff to transmission procedure and the first base station the resource information and the power report, using the power information included in the message, determining a target BS to perform a handoff for at least one and this handoff included in the response message to the first base station including the command message, the process of transfer to the terminal, the user terminal ranging process with the target base stations contained in the handoff command message, upon receiving the handoff command message sending the to the first base station, and a response message thereto process, and the ranging process after the handoff command message to perform the Include those that contain the target base station and the process of performing the first base station and data communication.