Patent ID: 7917183

Claim:
A method of controlling an idle mode by a base station in a broadband wireless access system, the method comprising: receiving, at the base station, a message from a mobile subscriber station, the message used for requesting a transition to the idle mode, wherein the base station belongs to at least two paging groups, each of the at least two paging groups having a paging cycle and a paging offset; transmitting, to the mobile subscriber station, paging information including first paging cycles and first paging offsets of the at least two paging groups; transmitting, to the mobile subscriber station, first paging messages, wherein the first two paging messages are transmitted according to the first paging cycles and the first paging offsets of the at least two paging groups; transmitting, to the mobile subscriber station, second paging messages including second paging cycles and second paging offsets of the at least two paging groups, and further including an action code instructing the mobile subscriber station to change paging cycles and paging offsets of the mobile subscriber station to the second paging cycles and the second paging offsets; and transmitting, to the mobile subscriber station, third paging messages according to the second paging cycles and the second paging offsets of the at least two paging groups.