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TechSpec
  • Foreword
  • 1 Scope
  • 2 References
  • 3 Definitions, symbols and abbreviations
  • 4 High level Principles
  • 5 Architecture model and reference points
  • 6 Functional description
  • 7 Procedures related to establishment of IMS emergency session
  • D.1 ECS redirecting IMS emergency call
  • D.2 ECS routes the emergency call to the gateway with record route
  • F.1 cdma2000 HRPD/PDS Options
  • F.2 Requirements on the HRPD Network as an IP-CAN
  • F.3 Information Flows
  • H.1 General
  • H.2 UE specific behaviour
  • H.3 High Level Procedures for IMS emergency calls
  • H.4 Location handling
  • H.5 Domain Priority and Selection Rules for Emergency Session Attempts
  • H.6 eCall over IMS
  • I.1 cdma2000 HRPD/EPC Options
  • I.2 Requirements on the HRPD/EPC Network as an IP‑CAN
  • I.3 Information Flows
  • J.1 General
  • J.2 UE specific behaviour
  • J.3 High Level Procedures for IMS emergency calls
  • J.4 Location handling
  • K.1 General
  • K.2 Functional description
  • K.2.1 General
  • K.3 IMS Emergency Registration and Session Establishment
  • K.4 Non UE detectable Emergency Session
  • L.1 General
  • L.2 UE specific behaviour
  • L.3 High Level Procedures for IMS emergency calls
  • L.4 Location handling

I.3 Information Flows

23.1673GPPIP Multimedia Subsystem (IMS) emergency sessionsRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The informational flows for emergency calls over HRPD are provided in 3GPP2 X.S0057-A [39].

Annex J (normative):
IMS emergency services using WLAN access to EPC