Section: 4.7.3.2.1 Combined GPRS attach procedure initiation
Content: If the MS is in GMM state GMM-DEREGISTERED and in MM state MM IDLE, the MS initiates the combined GPRS attach procedure by sending an ATTACH REQUEST message to the network, starts timer T3310 and enters state GMM-REGISTERED-INITIATED and MM LOCATION UPDATING PENDING. If timer T3302 is currently running, the MS shall stop timer T3302. If timer T3311 is currently running, the MS shall stop timer T3311. The MS shall set the Mobile identity IE, old RAI and P-TMSI signature in the ATTACH REQUEST message as specified in subclause 4.7.3.1.1. Furthermore the MS shall include the TMSI status IE if no valid TMSI is available. If the MS initiates a combined GPRS attach procedure for GPRS services and "SMS-only service", the MS shall indicate "SMS only" in the Additional update type IE. If the MS has stored a valid LAI and the MS supports EMM combined procedures, the MS shall include it in the Old location area identification IE in the ATTACH REQUEST message. If the MS has stored a valid TMSI, the MS shall include the TMSI based NRI container IE in the ATTACH REQUEST message. In Iu mode, if the MS wishes to prolong the established PS signalling connection after the GPRS attach (for example, the MS has any CM application request pending), it may set a follow-on request pending indicator on (see subclause 4.7.13).