Section: 5.6.1.5A Service request procedure for initiating a PDN connection for emergency bearer services not accepted by the network
Content: If the service request for initiating a PDN connection for emergency bearer services cannot be accepted by the network, the UE shall perform the procedures as described in clause 5.6.1.5. If the service request for initiating a PDN connection for emergency bearer services fails due to receiving the AUTHENTICATION REJECT message, the UE shall perform the procedures as described in clause 5.4.2.5. Then if the UE is in the same selected PLMN where the last service request was attempted, the UE 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 ]  [13D] can result in the emergency call being attempted to another IP-CAN. b) detach locally, if not detached already, attempt EPS attach for emergency bearer services. If the service request for initiating a PDN connection for emergency bearer services fails due to abnormal case a) in clause 5.6.1.6, the UE shall perform the actions as described in clause 5.6.1.6 and inform the upper layers of the failure to access the network. NOTE 2: 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 ]  [13D] can result in the emergency call being attempted to another IP-CAN. If the service request for initiating a PDN connection for emergency bearer services fails due to abnormal cases b), c), e), h) as well as l) when the "Extended wait time" is ignored, and la) when the "Extended wait time CP data" is ignored in clause .6, the UE shall perform the procedures as described in clause 5.6.1.6. Then if the UE is in the same selected PLMN where the last service request was attempted, the UE shall: a) inform the upper layers of the failure of the procedure; or NOTE 3: 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 ]  [13D] can result in the emergency call being attempted to another IP-CAN. b) detach locally, if not detached already, attempt EPS attach for emergency bearer services.