Section: 4.1.1.2.1 GPRS MS operating in mode A or B in a network that operates in mode I
Content: If the network operates in mode I, GPRS MSes that operate in mode A or B and wish to be or are simultaneously IMSI attached for GPRS and non-GPRS services, shall use the combined GPRS attach and the combined and periodic routing area updating procedures instead of the corresponding MM specific procedures IMSI attach and normal and periodic location area updating. A GPRS MS operating in mode A or B in a network that operates in mode I, shall perform the combined GPRS attach or routing area update procedure regardless the value of the ATT flag. If a GPRS MS is operating in mode A or B in a network that operates in mode I the IMSI detach shall be performed by the GMM using the combined GPRS detach procedure. A GPRS MS operating in mode A or B in a network that operates in mode I, shall perform the combined GPRS detach procedure regardless the value of the ATT flag. A GPRS MS operating in mode A or B in network that operates in mode I, shall use the combined GMM specific procedures in place of the MM specific procedures unless the re-activation of the MM specific procedures is explicitly described, so all conditions describing when to trigger an MM specific procedure listed in subclauses 4.3 and 4.4 shall not apply. A GPRS MS operating in mode A or B in a network that operates in mode I should not use any MM timers relating to MM specific procedures, (e.g. T3210, T3211, T3212, T3213) unless the re-activation of the MM specific procedures is explicitly described. If the MM timers are already running, the MS should not react on the expiration of the timers. NOTE 1: Whenever GMM performs a combined GMM procedure, a GPRS MS enters the MM state MM LOCATION UPDATING PENDING in order to prevent the MM from performing a location area updating procedure. If the authentication procedure is performed by MM and the authentication is rejected by the network (i.e. upon receive of AUTHENTICATION REJECT), the MS shall in addition set the GPRS update status to GU3 ROAMING NOT ALLOWED and shall, if available, delete the P-TMSI, P-TMSI signature, RAI and GPRS ciphering key sequence number stored. The SIM/USIM shall be considered as invalid for GPRS and non-GPRS services until switching off or the SIM/USIM is removed. The MS shall abort any GMM procedure and shall enter state GMM-DEREGISTERED. If S1 mode is supported in the MS, the MS shall handle the EMM parameters EPS update status, GUTI, last visited registered TAI, TAI list and KSI as specified in 3GPP TS 24.301[ Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 ]  [120] for the case when the EPS authentication is not accepted by the network. If the PS or CS domain is barred because of domain specific access control, a GPRS MS operating in mode A or B in a network that operates in mode I shall act as if in network operation mode II and access to the barred domain shall be stopped entirely. If the MS detects that a domain is barred, this shall not trigger any MM or GMM specific procedure. A GPRS MS operating in mode A or B in a network that operates in mode I shall perform a normal location updating procedure (in order to remove the Gs association in the MSC/VLR) when the following conditions are fulfilled: - the GPRS MS has camped on a cell where the PS domain is barred and the CS domain is unbarred; and - T3312, T3311, T3302, or T3330 expires; and - for the last attempt to update the registration of the location area a combined GMM procedure was performed. Additionally the MS shall treat the expiry of T3312 when the PS domain changes from barred to unbarred, analogous to the descriptions for the cases when the timer expires out of coverage or in a cell that does not support GPRS (see subclause 4.7.2.2). If timer T3312 expires and both the PS and CS domain are barred, then a GPRS MS operating in mode A or B in a network that operates in mode I shall treat the expiry of T3312 when the GPRS MS detects that the PS or CS domain becomes unbarred, analogous to the descriptions for the cases when the timer expires out of coverage (see subclause 4.7.2.2). If the PS domain is barred and timer T3312 expires during an ongoing CS connection, then a GPRS MS operating in mode A or B in a network that operates in mode I shall treat the expiry of T3312 when the MM state MM-IDLE is entered, analogous to the descriptions for the cases when the timer expires out of coverage or in a cell that does not support GPRS (see subclause 4.7.2.2), or in a cell where the PS domain is barred. A GPRS MS operating in mode A or B in a network that operates in mode I shall perform a combined routing area update procedure indicating "combined RA/LA updating with IMSI attach" (in order to establish the Gs association in the MSC/VLR) when the following conditions are fulfilled: - the GPRS MS detects that CS or PS domain or both change from barred to unbarred; - as a result of the change of the domain specific barring status, both domains are unbarred; and - for the last attempt to update the registration of the location area an MM specific procedure was performed (see subclause 4.7.5.2.1) or for the last attempt to update the registration of the routing area a normal routing area update was performed. A GPRS MS operating in mode A or B on a PLMN which is part of "forbidden PLMNs for GPRS service" list in a network that is operating in mode I shall act as if in network operation mode II and proceed with appropriate MM procedures.