Status and Development of VoIP based emergency

calls

Alexander Mayrhofer, nic.at GmbHThe 1st European Security and

Safety SummitBrussels, June 2007

Agenda

Motivation for a new emergency call services architecture

IETF architecture overview nic.at/IPA emergency call services

registry project in Austria

About nic.at/IPA

IPA: Internet Foundation Austria fostering the develoment of Internet in Austria

owner of nic.at – country code domain registry for .at

enum.at – ENUM registry for +43 neutral provider critical, internet based

registry infrastructure – emergency services registry

Alexander Mayrhofer: team leader research/development nic.at

Motivation for a new

emergency call architecture Overview of current model New communication means (eg

VoIP) break this modelseperation of service and accessmobility (number <-> location

relation)no phone numbers at allNew "media" (video, chat, IM)

call routing requirements

Routing the call to the right PSAPcaller locationlocal policy

Providing the PSAP with caller informationlocationcallback information (number)

current call routing

(Austria) Routing to the right PSAP

number -> location -> PSAP contactnumber -> area code -> PSAP contactcell id -> PSAP contact

Providing PSAP with infonumber: CLI display forcedlocation: number directory reverse

lookupor out of band location request

"Conventional"

communications Closed, trusted network

trusted identities: numbers Access and service provided by

one party (or tightly integrated)location retrieval relatively easy

Well known set of applicationsmostly telephony

VoIP mobility example

Internet(various

providers)

Internet(various

providers)

VoIPSP

VoIPSP

Vienna, Austria

Brussels

+43 59966

Accessprovider

Accessprovider

112

Brussels Police

?

Vienna Police

"internet based" communications

Open, untrusted networkrequires additional security/trust

layers Service and Access provided

by different providerslocation retrieval more difficult

Vast array of applicationseven "VoIP" is not always the same

internet emergency service

issues access network knows the location,

service provider needs itand they don't know of each otherservice not limited to one access

network Numbers can't always be used as

key for informationMost services don't use numbers at all

Trust relation, security, authenticity

IETF emergency services

work Working groups: ECRIT, GEOPRIV Location delivery (LCP) Service identification (service URN) Service discovery (LoST) Privacy, security (location by

reference, location signing)

IETF architecture

overview I Access network provides location

to clientcivic (street, number, postal code,

city...)geodetic (latitude, longitude,

elevation)By value / by reference

Location configuration

Internet(various

providers)

Internet(various

providers)

VoIPSP

VoIPSP

Vienna, Austria

Brussels

Accessprovider

Accessprovider

Brussels Police Vienna Police

LSLS

lat,lon..

IETF architecture

overview II Client queries for PSAP contacts

using location information receiveduses "Location to Service Translation"

(LoST) serverseither before the emergency call, or

when client is started (if it is not moved)

Client knows PSAP contacts for services based on his location

Location to Service

Translation

Internet(various

providers)

Internet(various

providers)

VoIPSP

VoIPSP

Vienna, Austria

Accessprovider

Accessprovider

Brussels Police Vienna Police

LSLS LoSTLoSTQ: sos.police for lat/lon?A: brussels.police@example.com

Current situation in

Austria Emergency numbers now officially

assigned Assignees are required to provide

information about desired routing (Telephony) Network Service

Providers are required to provide information about implemented routing

IPA/nic.at Emergency

Services Project Architecture requires a shared, up-to-

date reference database of service areas and contact data for all short codesDoes currently not exist in Austria!

Motivation for nic.at: critical, registry based service to be provided by a neutral, trusted party – vast experience.

Important for the development of new communication means

Scope of project

Practical application of those standards under development

provide a prototypic implementation of a next generation emergency call routing infrastructureLocation-enabling access networkscollecting and providing call routing data

(registry) – LoST serverenabling PSAPs for new services

Questions & contact info

Questions?

Alexander Mayrhofernic.at GmbH

Karlsplatz 1/2/9A-1010 Wien

mailto:alexander.mayrhofer@nic.at - +43 1 5056416 34