Section: 4.7.2.8 Handling of timer T3324 (A/Gb mode, Iu mode and S1 mode)
Content: An MS supporting PSM may request the network to assign a value for T3324 by including a requested timer value in: - the ATTACH REQUEST or ROUTING AREA UPDATE REQUEST message (in A/Gb mode and Iu mode ); or - the ATTACH REQUEST or TRACKING AREA UPDATE REQUEST message (in S1 mode). The value of timer T3324 can be sent by the network to the MS in: - the ATTACH ACCEPT or ROUTING AREA UPDATE ACCEPT message (in A/Gb mode and Iu mode ); and - the ATTACH ACCEPT or TRACKING AREA UPDATE ACCEPT message (in S1 mode). NOTE: Besides the value requested by the MS, the network can take local configuration into account when selecting a value for T3324 (see 3GPP TS 23.682[ Architecture enhancements to facilitate communications with packet data networks and applications ]  [133A], subclause 4.5.4). In A/Gb mode and Iu mode, the MS shall apply the received T3324 value in the RA identified by the RAI contained in the ATTACH ACCEPT or ROUTING AREA UPDATE ACCEPT message, until a new value is received, T3324 is deactivated or a new PLMN is selected. The timer T3324 is deactivated if: - the last attach or routing area updating attempt was not completed successfully; - the network does not include a value for timer T3324 in the last ATTACH ACCEPT or ROUTING AREA UPDATE ACCEPT message received by the MS; or - the indicated value of the timer is "deactivated". In A/Gb mode and Iu mode, timer T3324 is reset and started with its initial value, when the MS changes from PMM-CONNECTED mode to PMM-IDLE mode (in Iu mode) or when the READY timer is stopped or expires (in A/Gb mode). Timer T3324 is stopped when the MS enters PMM-CONNECTED mode or GMM-DEREGISTERED state or the READY timer is started. In S1 mode, the MS shall apply the received T3324 value in all tracking areas of the list of tracking areas assigned to the MS, until a new value is received, T3324 is deactivated or a new PLMN is selected. The timer T3324 is deactivated if: - the last attach or tracking area updating attempt was not completed successfully; - the network does not include a value for timer T3324 in the last ATTACH ACCEPT or TRACKING AREA UPDATE ACCEPT message received by the MS; or - the indicated value of the timer is "deactivated". In S1 mode, timer T3324 is reset and started with its initial value, when the MS changes from EMM-CONNECTED mode to EMM-IDLE mode. Timer T3324 is stopped when the MS enters EMM-CONNECTED mode or EMM-DEREGISTERED state.In A/Gb mode and Iu mode, when timer T3324 expires the MS may activate PSM as specified in subclause 4.7.2.9. In S1 mode, when timer T3324 expires the MS may activate PSM as specified in 3GPP TS 24.301[ Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 ]  [120], subclause 5.3.11. In A/Gb mode and Iu mode, if timer T3324 expires during an ongoing CS connection, the MS shall take action on the expiry of timer T3324 as described in subclause 4.7.2.9 when the MM state MM-IDLE is entered.