Patent ID: 9113433
Filing Date: 2015-08-18
Classification: H04W

Abstract:
1. A method of performing, by a mobile station (MS), a network reentry procedure in an idle mode in a wireless access system, the method comprising: receiving control information indicating an initial ranging back-off window size for machine-to-machine (M2M) devices from a base station (BS) during a paging listening interval; determining the initial ranging back-off window size for an initial ranging using the received control information; randomly selecting a back-off value within the determined initial ranging back-off window size for network access; and transmitting an initial ranging code for the network access, wherein the control information is an initial ranging back-off start parameter, wherein the control information is received through a paging advertisement message (MOB_PAG-ADV or AAI_PAG-ADV), wherein the control information is assigned to each M2M group in a plurality of M2M groups and indicates an initial ranging back-off window size for M2M devices belonging to each of the plurality of M2M groups, and wherein an M2M group ID (MGID) is transmitted with the paging advertisement message to identify each M2M group in the plurality of M2M groups.