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Leliwa Sp. z o.o . leliwa

VoLTE Basics. Leliwa Sp. z o.o . www.leliwa.com. Emergency call. Emergency call. The need for support of emergency calls in the IM CN subsystem is determined by national regulatory requirements. IP-CAN bearer setup for emergency session (UE EPS registered).

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Leliwa Sp. z o.o . leliwa

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  1. VoLTE Basics Leliwa Sp. z o.o. www.leliwa.com

  2. Emergency call

  3. Emergency call The need for support of emergency calls in the IM CN subsystem is determined by national regulatory requirements.

  4. IP-CAN bearer setup for emergency session (UE EPS registered) emergency APN & QoS configuration MME   PDN connectivity req. (type=emergency) emergency IMS  IP S-GW P-GW IP IMS

  5. IP-CAN bearer setup for emergency session (UE EPS not registered) emergency APN & QoS configuration MME  Attach request (type=emergency)  emergency IMS  IP S-GW P-GW IMS

  6. REGISTER REGISTER REGISTER REGISTER UAR/UAA UAR/UAA REGISTER REGISTER MAR/MAA SAR/SAA 401UNAUTHORIZED 200 OK 401 UNAUTH. 200 OK 401UNAUTH 200 OK Emergency IMS registration* Emergency APN HSS S-CSCF P-CSCF I-CSCF sos sos sos sos *USIM/ISIM available

  7. E-CSCF in IMS architecture Emergency – Service Consistency and Continuity AS Location Retrieval Function E-SCC AS LRF Le Mm IMS I4 MI P-CSCF E-CSCF PSAP call setup Mw Gm Mi/Mg PSTN Mw S-CSCF Mm/Mw Emergency-CSCF Public Safety Answering Point

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