Patent ID: 8811996

Claim:
A method of performing a handover through a zone switch by an advanced mobile station (AMS) from a legacy serving base station to a target advanced base station (ABS) in a wireless communication system, the method comprising: receiving, by the AMS from a legacy zone (LZone) of the target ABS, a ranging response message used for a ranging procedure, the ranging response message including information regarding a zone switch time; and performing, by the AMS, the zone switch to an advanced mobile station supportive zone (MZone) based on the information regarding the zone switch time, wherein the information regarding the zone switch time is included in the ranging response message in form of zone switch information (Zone Switch TLV), and performing, by the AMS, a network reentry in the MZone with the target ABS based on a SuperFrame Header (SFH) of the MZone received from the LZone before performing the zone switch, wherein the SFH of the MZone is used to communicate within the MZone with the target ABS after performing the zone switch, and wherein the SFH of the MZone includes at least one of a secondary superframe header SubPacket1 (SP1), a secondary superframe header SubPacket2 (SP2) or a secondary superframe header SubPacket3 (SP3) regarding the MZone.