dication Indication Indication W0: Initial Sleep Cycle LW: Listening Window SW: Sleep Window LWE: Listening Window Extension TMS: MS Inactivity Timer FIGURE 6-22 Sleep mode operation for HTTP traffic (example) [25] CHAPTER 6 The IEEE 802. 16m MAC CPS (Part I) paging listening interval based on the assigned paging cycle and paging offset. At the beginning of the paging listening interval, the MS scans and synchronizes with the downlink of its preferred BS. The MS receives and decodes the system information. The MS confirms whether it is still in the same paging group based on PGID information. During the paging listening interval, the MS monitors superframe header content. If the contents of superframe header has changed, the MS acquires the updated system information. The MS decodes the full paging message at the predetermined intervals. If the MS decodes a paging message that contains its identification, it performs network re-entry or location update depending on the notification indicated in the paging message; otherwise, the MS returns to paging unavailable interval. An MS or serving BS initiates Idle State using procedures defined in the legacy system [1]. In order to reduce signaling overhead and to provide location privacy, a temporary identifier is assigned to uniquely identify the mobile stations in the Idle State in any paging group. The mobile station's temporary identifier remains valid as long as the MS resides in the same paging group. The temporary identifier is assigned on Idle State entry or during location update as a result of paging group change. The temporary identifier may be used in paging messages or during mobile station's network re-entry. An MS terminates the Idle State operation using procedures defined in the legacy system [1]. For termination of Idle State, the MS performs network re-entry with its preferred BS. An MS in the Idle State performs the location update process, if any of the following location update trigger conditions are met; during paging group location update, timer b