lng for ng 9-1-1/ ng 1-1-2 realization of ietf standards for the operational use in a legacy network...

LNG for

NG 9-1-1/ NG 1-1-2 Realization of IETF Standards

for the operational usein a Legacy Network Gateway

forNext 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

Wireless/IPClient

DNS

Public WebServices

Wireless/CSClient

LISsMultimediaServices

OriginatingESRP

OriginatingBorder Control

Location ValidationWeb Interface

ESInetGlobal Internet,

Private Networks or IMS

Public AccessIP NetworksSIP/H.323

clients

IM Clients

Legacy PSAP/Emergency Responders

CSPCall Server

GovernmentServices

SupplementalServices

Databases

NG9-1-1 (i3) PSAP

ESInet

Access Networks Origination Networks Emergency Services IP Network (ESInet) Domains

TerminatingESRP

TerminatingBorder Control

Clients

Legacy Circuit-Switched Networks

PSTN client

Legacy PSAPGateway

E-CSCF(IMS)

LegacyNetworkGateway

ECRWeb

Interfaces

Private WebServices

NG9-1-1 (i3) PSAP

Emergency Call Routing &Location Validation

Databases

“NG-911” at the moment

IP Network of Telecoms

(VoIP)

PSAPIP Network

(VoIP)

pure wire

circuit switchedconnection

ANI/ALIrequest

ESInet, what’s the right way

connection to telecom’sStandard

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

ClientLoST

Server

LocationInformation

Server PSAP

HELD

ECRIT

DHCP INFORM

access domain

PSAP URI

DHCP/DNSServer

DNS NAPTR (access domain)

LIS URI

location

HELD

LoST (location)

connect

at initial start of LNG

with every call

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)

connection to individual LIS using HELD

LIF Protocol Interwork Function

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