lng for ng 9-1-1/ ng 1-1-2 realization of ietf standards for the operational use in a legacy network...
TRANSCRIPT
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)
for Questions about 112 Operations Committee