Patent ID: 8635312

Claim:
A method for transmitting updated system information through a superframe header (SFH) by a base station in a broadband wireless communication system, the method comprising: transmitting the SFH to a mobile terminal, wherein the SFH includes a primary superframe header information element (P-SFH IE) in every superframe and at least one secondary superframe header subpacket information element (S-SFH SP IE) in a scheduled superframe, wherein each P-SFH IE includes a scheduling information bitmap indicating the at least one S-SFH SP IE, a change count (CC) of an S-SFH, and an SP change bitmap indicating a changing status of the at least one S-SFH SP IE, and wherein the CC is not increased until one of the at least one S-SFH SP IE is changed; and transmitting a P-SFH IE including an increased CC in a specific superframe to the mobile terminal, wherein a difference between a previous CC and the increased CC is used to indicate whether to update one of the at least one S-SFH SP IE.