Internet / Next Generation Emergency Calls
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Transcript of Internet / Next Generation Emergency Calls
Ernst LangmantelTechnical Director, Austrian Regulatory Authority for Broadcasting and Telecommunication (RTR GmbH)
The opinions expressed in this presentation are the personal views of the author and do not prejudge decisions of the Austrian regulatory authority
Internet / Next Generation Emergency Calls
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 2
Contents
Basic Service Architecture Elements Legacy networks (PSTN/ISDN, GSM/UMTS)
Architecture – Outgoing Calls – Emergency Calls
Internet Architecture – Outgoing Calls – Emergency Calls
NGN (ITU/ETSI) Architecture – Outgoing Calls – Emergency Calls
IETF/Internet and ITU/ETSI NGN – Synergies ?
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 3
Basic Service Architecture Elements
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 4
Transport
Network Edge[Terminals, Application servers]Network of Networks
Service Connectivity,Signalling
Terminal
Terminal
Networks and Terminals
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 5
Transport
Network Edge[Terminals, Application servers]Network of Networks
Service Connectivity,Signalling
Terminal
Media Streams / User Data Path
Terminal
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 6
Transport
Network Edge[Terminals, Application servers]Network of Networks
Service Connectivity,Signalling
Terminal
Signalling
Terminal
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 7
Legacy networks (PSTN/ISDN, GSM/UMTS)Architecture – Outgoing Calls – Emergency Calls
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 8
Transport
Service Connectivity,Signalling
PSTN /ISDN, GSM/UMTS – Architecture [simplified]
Without service interconnection (service interoperability)between networks the service area is restricted to area of individual networks
Service control andphysical routing pointscombined in “Telephone Exchanges”
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 9
g
Caller / Called in Home Network
Service Connectivity,Signalling
HH
PSTN /ISDN, GSM/UMTS – Outgoing/ Emergency Call [simplified]
In case of emergency calls national emergency routing information is retrieved locally in the telephone exchange or from a national data base
Transport
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 10
HService Connectivity
VH
Caller in Visited Network
GSM/UMTS – Roaming Outgoing /Emergency Calls [simplified]
Call control in visited networkIn case of emergency calls national emergency routing information is retrieved locally in the telephone exchange or from a national data base
PSAP
Transport
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 11
Internet Architecture – Outgoing Calls – Emergency Calls
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 12
Transport(IP-Packets)
Service Connectivity,Signalling
Internet Services - Architecture [simplified]
ONLY IP-Interoperability necessary for GLOBAL service area !
Service control (call control) at the network edge. NO CONTROL of network transport by service control
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 13
Service Connectivity,Signalling
Internet VoIP - Outgoing Call [simplified]
Global service area without service interoperability between providers
“Home Position”
IP-interoperability between networks
Transport(IP-Packets)
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 14
Service Connectivity,Signalling
Internet VoIP – Outgoing Call [simplified]
IP-Interoperability between networks
Different Service/Application ProvidersInteroperability between services/ applications of network edge, not relevant for networks
Transport(IP-Packets)
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 15
Service Connectivity,Signalling
Internet VoIP - Emergency Call Solution (ECRIT) [simplified]
HH
LoST
fully distributed international emergency routing data
base
PSAP
Location &
type of emergency
PSAP UrI
Where do I get PSAP Url in visited
country?
Type of emergency
& location
Transport(IP-Packets)
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 16
LoST Functionality (Location-to-Service Translation Protocol)
Satisfies the requirements (draft-ietf-ecrit-requirements) for mapping protocols
Civic as well as geospatial queries civic address validation
Recursive and iterative resolution Fully distributed and hierarchical deployment
can be split by any geographic or civic boundary same civic region can span multiple LoST servers
Indicates errors in civic location data debugging but provides best-effort resolution
Supports overlapping service regions
Source: SDO Emergency Services Coordination Workshop (5./6.10.2006, Columbia University, New York), A Location-to-Service Translation Protocol (LoST)- Mapping Protocol Architecture, Ted Hardie, Andrew Newton, Henning Schulzrinne, Hannes Tschofenig
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 17
LoST Conclusions Mapping is core component of emergency calling problem LoST fully international and distributed
tries to avoid “who runs the root” problem optimized for efficient use in mobile end systems
Source: SDO Emergency Services Coordination Workshop (5./6.10.2006, Columbia University, New York), A Location-to-Service Translation Protocol (LoST)- Mapping Protocol Architecture, Ted Hardie, Andrew Newton, Henning Schulzrinne, Hannes Tschofenig
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 18
NGN (ITU/ETSI)Architecture – Outgoing Calls – Emergency Calls
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 19
Physical Transport (IP Packets)
Service Connectivity,Signalling
NGN – Architecture [simplified]
Service control and physical routing in DIFFERENT network elements but fierce control of transport resources by service control within individual networks.
Without service interconnection (service interoperability) the service area is restricted to area of individual networks(same as in legacy circuit switched networks)
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 20
NGN (IMS) - Outgoing Call [simplified]
Roaming User (Exception for Emergency Calls!)
Physical Transport(IP-Packets)
HService Connectivity
VH
Call control for roaming user from “Home Position” (Internet-like) BUT via visited network
Caller in visited network
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 21
Physical Transport(IP-Packets)
NGN (IMS) - Emergency Call NGN [simplified]
Roaming User
HService Connectivity
V
Home Position lacks knowledge of caller location and national emergency routing in visited country
PSAP
Caller in visited network
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 22
Physical Transport(IP-Packets)
HService Connectivity
VH
In case of emergency calls also in NGN (like in GSM/UMTS) invocation of call control in visted network including access to national emergency routing information to PSAP.
PSAP
NGN (IMS) - Emergency Call NGN [simplified]
Roaming User
Caller in visited network
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 23
IETF/Internet and ITU/ETSI NGN – Synergies ?
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 24
One “Emergency (IP-)World” ? A lot of synergies regarding ITU/ETSI NGN and IETF Internet standards are
already in place because 3GPP standardisation is done in collaboration with IETF and NGN built on 3GPP specs.
Global routing database (LoST) is key element in IETF ECRIT concept. Global IETF emergency call routing database should also be able to serve 3GPP
and NGN needs. No basic change to current basic NGN architecture necessary if NGN reuses IETF
data base. NGN Location Retrieval Function (LRF) could access LoST.
The goal:
Only one place for the emergency organisations to put their routing requirements data!
“Single point of truth”
Can the two worlds come together ?
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 25
Further Information NGN
ETSI NGN, IMS emergency session standards ETSI TS 102 424 (2005-09) – Requirements for the NGN network to support emergency communication
from citizen to authority
Draft ETSI TS 182 009 (version 12.07.2006) – NGN Architecture to support emergency communication from citizen to authority
ETSI TS 102 164 (2006-09) – Emergency Location Protocols
G. Camarillo, M. A. Garcia-Martin, The 3G IP Multimedia Subssystem (IMS), Wiley 2006
IETF / ECRIT – Emergency Context Resolution using Internet Technologies
http://www.ietf.org/html.charters/ecrit-charter.html
A Wiki page that points to the most important documents:http://www.tschofenig.com/twiki/bin/view/EmergencyServices/EcritReviews(including link to SDO Emergency Services Coordination Workshop (ESW06))
IETF: http://edu.ietf.org/
ITU Workshop "Future of Voice", 15./16.01.2007, Geneva Seite 26
Thank you very much for your attention !