Patent ID: 8660064

Claim:
A method for receiving a paging message in a mobile station, the method comprising: receiving paging information from a serving base station, the paging information including a paging sub group identifier indicating a paging sub group to which the mobile station belongs; receiving the paging message for a paging interval of the paging sub group, wherein the paging message includes a system information update indication (SIUI) field; and receiving updated system information via a superframe header (SFH) received at a first subframe of a next superframe after the receiving of the paging message including the SIUI field, if the SIUI field indicates a presence of the updated system information, wherein the paging sub group is different from a paging group, the paging group is determined by a geographical location, the paging sub group is determined by a mobile station ID, and the paging sub group is maintained while the mobile station is being operated in an idle mode regardless of the geographical location.