presentation - ITU

munchdrabNetworking and Communications

Oct 30, 2013 (4 years and 2 months ago)

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Ernst Langmantel

Technical 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

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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

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Basic Service
Architecture

Elements

ITU Workshop "Future of Voice", 15./16.01.2007, Geneva

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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

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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

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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

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Legacy networks (PSTN/ISDN, GSM/UMTS)

Architecture


Outgoing Calls


Emergency Calls


ITU Workshop "Future of Voice", 15./16.01.2007, Geneva

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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 and

physical routing points

combined in

“Telephone Exchanges”


ITU Workshop "Future of Voice", 15./16.01.2007, Geneva

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Caller / Called in
Home

Network

Service Connectivity,

Signalling

H

H

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

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H

Service Connectivity

V

H

Caller in
Visited

Network

GSM/UMTS


Roaming Outgoing /Emergency Calls
[simplified]

Call control in visited network

In 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

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Internet

Architecture


Outgoing Calls


Emergency Calls


ITU Workshop "Future of Voice", 15./16.01.2007, Geneva

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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


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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)

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Service Connectivity,

Signalling

Internet VoIP


Outgoing Call
[simplified]

IP
-
Interoperability between networks

Different Service/Application Providers

Interoperability between

services/ applications of
network edge, not relevant for
networks

Transport

(IP
-
Packets)

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Service Connectivity,

Signalling

Internet VoIP
-

Emergency Call Solution (ECRIT)
[simplified]

H

H

LoST

fully
distributed
international
emergency
routing data
base

PSAP

Where do I get
PSAP Url in visited
country?

Transport

(IP
-
Packets)

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LoST Functionality
(
Lo
cation
-
to
-
S
ervice
T
ranslation 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
Lo
cation
-
to
-
S
ervice
T
ranslation Protocol (LoST)
-

Mapping Protocol Architecture, Ted Hardie, Andrew Newton, Henning
Schulzrinne, Hannes Tschofenig



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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
Lo
cation
-
to
-
S
ervice
T
ranslation Protocol (LoST)
-

Mapping Protocol Architecture, Ted Hardie, Andrew Newton, Henning
Schulzrinne, Hannes Tschofenig




ITU Workshop "Future of Voice", 15./16.01.2007, Geneva

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NGN (ITU/ETSI)

Architecture


Outgoing Calls


Emergency Calls

ITU Workshop "Future of Voice", 15./16.01.2007, Geneva

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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)

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NGN (IMS)
-

Outgoing Call
[simplified]

Roaming User (Exception for Emergency Calls!)

Physical Transport

(IP
-
Packets)

H

Service Connectivity

V

H

Call control for roaming user from
“Home Position” (Internet
-
like) BUT
via visited network


Caller in visited network

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Physical Transport

(IP
-
Packets)

NGN (IMS)
-

Emergency Call NGN
[simplified]

Roaming User

H

Service Connectivity

V

Home Position lacks knowledge of caller
location and national emergency routing
in visited country


PSAP

Caller in visited network

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Physical Transport

(IP
-
Packets)


H

Service Connectivity

V

H

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

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IETF/Internet and ITU/ETSI NGN


Synergies ?


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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 ?


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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/





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Thank you very much for your attention !