Section: 4.7.3.1.4b Attach for initiating a PDN connection for emergency bearer services not accepted by the network (UTRAN Iu mode only)
Content: If the network cannot accept the attach request for initiating a PDN connection for emergency bearer services with attach type not set to "emergency attach", the MS shall perform the procedures as described in subclause 4.7.3.1.4. Then if the MS is in the same selected PLMN where the last attach request was attempted, the MS shall: a) inform the upper layers of the failure of the procedure; or NOTE 1: This can result in the upper layers requesting establishment of a CS emergency call (if not already attempted in the CS domain) or other implementation specific mechanisms, e.g. procedures specified in 3GPP TS 24.229[ IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 ]  [95] that can result in the emergency call being attempted to another IP-CAN. b) attempt GPRS attach for emergency bearer services. If the attach request for initiating a PDN connection for emergency bearer services with attach type not set to "emergency attach" fails due to abnormal case a) in subclause 4.7.3.1.5, the MS shall perform the procedures as described in subclause 4.7.3.1.5 and inform the upper layers of the failure to access the network. NOTE 2: This can result in the MS attempting a CS emergency call (if not already attempted in the CS domain) or other implementation specific mechanisms, e.g. procedures specified in 3GPP TS 24.229[ IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 ]  [95] that can result in the emergency call being attempted to another IP-CAN. If the attach request for initiating a PDN connection for emergency bearer services with attach type not set to "emergency attach" fails due to abnormal cases b), c) or d) in subclause 4.7.3.1.5, the MS shall perform the procedures as described in subclause 4.7.3.1.5. Then if the MS is in the same selected PLMN where the last attach request was attempted, the MS shall: a) inform the upper layers; or NOTE 3: This can result in the MS attempting a CS emergency call (if not already attempted in the CS domain) or other implementation specific mechanisms, e.g. procedures specified in 3GPP TS 24.229[ IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 ]  [95] that can result in the emergency call being attempted to another IP-CAN. b) attempt GPRS attach for emergency bearer services.