tation state diagrams change. The temporary identifier may be used in paging messages or during the mobile station's network re-entry. An MS exits the Idle State by invoking procedures defined in IEEE 802.16m [2] (or alternatively corresponding procedures in reference [1] for the legacy systems). For termination of the Idle State, the MS performs network re-entry with its preferred BS. The network re-entry procedure can be streamlined by the target BS possession of the MS context. An MS in the Idle State will perform a location update process based on any of the following triggers: Paging group location update; Timer-based location update; Power-down location update; Multicast and Broadcast Service (MBS) location update. During a paging group location update, timer-based location update, or MBS location update, the MS may update its temporary identifier, paging cycle, and paging offset. If an MS updates its location, depending on the security association, it informs its preferred BS using either a secure or unsecure location update process. The location update consists of conditional evaluation and location update signaling. The MS performs the location update process when it detects a change in paging group. The change of paging group is detected by monitoring the Paging Group IDs, which are transmitted by the BS. The MS periodically performs a location update process prior to the expiration of the Idle State timer. At each location update, including paging group location update, the Idle State timer is reset and restarted. The MS attempts to complete a location update once as part of its regular power-down procedure. For an MS receiving MBS data in the Idle State and during MBS zone transition, the MS may perform the MBS location update process to acquire the MBS zone information for continuous reception of MBS data. The transition to Idle State requires the MS to deregister from the serving BS. The MS deregistration is a process originated by shutdown or some failed conditions where the MS is deregistered from