LNG for NG 9-1-1/ NG 1-1-2 Realization of IETF Standards for the - PowerPoint PPT Presentation

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