LNG for NG 9-1-1/ NG 1-1-2 Realization of IETF Standards for the operational use in a Legacy Network Gateway for Next Generation Emergency Communication Centers Gregor Jänin, ENP 5/13/10
Background • Work being done: • Detailed Functional and Interface Specification for the NENAi3 Solution- Stage3 (Chapter 7) based on ideas from Theresa Reese (Telcordia) • Plans towards pure IP systems, and the truth • Studies for a master thesis • requests from the PSAP’s • need of a LNG as COTS product
Big Picture Clients Access Networks Origination Networks Emergency Services IP Network (ESInet) Domains Legacy PSAP/Emergency Responders Government Services Legacy PSAP Gateway IM Clients LISs Public Web Multimedia Services CSP Services DNS NG9-1-1 (i3) PSAP Call Server ESInet Originating Global Internet, Border Control ESInet Public Access Private Networks IP Networks SIP/H.323 or IMS clients Originating ECR ESRP Web Terminating Terminating Interfaces E-CSCF Border Control ESRP (IMS) Location Validation Web Interface Private Web Services Legacy Network Gateway Wireless/IP Supplemental Emergency Call Routing & Client Services Location Validation Databases Databases NG9-1-1 (i3) PSAP Legacy Circuit- Switched Networks PSTN client Wireless/CS Client
“NG - 911” at the moment IP Network of PSAP pure wire Telecoms IP Network (VoIP) (VoIP) circuit switched connection ANI/ALI request
ESInet, what’s the right way ? Standard PSTN 2 VoIP Gateway
Gateway overview
placing a Gateway now • using a standard PSTN 2 VoIP gateway
Job of a LNG
Discovering & Calling a PSAP with ECRIT Location DHCP/DNS LoST Information Client PSAP Server Server Server DHCP INFORM access domain H DNS NAPTR at initial start of LNG E (access domain) L D LIS URI HELD with every call location E LoST (location) C PSAP URI R connect I T
i3 defined LNG-Functions • PIF Protocol Interwork Function • NIF NG 9-1-1 / 1-1-2 Specific Interwork Function • LIF Location Interwork Function
looking inside a LNG
PIF Protocol Interwork Function Legacy Interfaces(circuit switched) Ethernet IP interfaces (“legacy” side) Border Control Function (BCF) NG 911 Specific Interwork Funct. (NIF) Ethernet IP interfaces (ESInet side)
NG 112/911 spec. Interwork Function PIF (receiving call information) LIF ECRF PIF (delivering processed call information)
LIF Protocol Interwork Function connection to individual LIS using HELD
CAMA vs. ISDN Data for lookup available (with ISDN ) Result with CAMA: delay of call setup
possible scenario with CAMA best effort call forward also used if LIS does not respond in time!
outgoing call via LNG LPG • works as Legacy PSAP Gateway • handover to other ESInet • Standard Call Gateway
pure IP- world in the US 2020 ??? in the EU 2025 ???
Q & A ??
thanks for staying awake.. contact: Gregor Jänin, ENP +43 664 357 3632 (GMT+2) gregor.jaenin@dispo.net for Questions about 112 Operations Committee gj@eena.org
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