SIST ES 203 178 V1.1.1:2015

SLOVENSKI STANDARD
SIST ES 203 178 V1.1.1:2015
01-oktober-2015

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Functional architecture to support European requirements on emergency caller location

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 5

1 Scope ........................................................................................................................................................ 6

2 References ................................................................................................................................................ 6

2.1 Normative references ......................................................................................................................................... 6

2.2 Informative references ........................................................................................................................................ 6

3 Definitions and abbreviations ................................................................................................................... 7

3.1 Definitions .......................................................................................................................................................... 7

3.2 Abbreviations ..................................................................................................................................................... 9

4 Descriptions and assumptions .................................................................................................................. 9

4.1 Introduction ........................................................................................................................................................ 9

4.2 Location information descriptions .................................................................................................................... 10

4.2.1 General ........................................................................................................................................................ 10

4.2.2 Location value ............................................................................................................................................ 10

4.2.3 Location identifier....................................................................................................................................... 10

4.2.4 Location reference ...................................................................................................................................... 11

5 Functional architecture to support European requirements on emergency caller location

determination and transport .................................................................................................................... 11

5.1 Overview .......................................................................................................................................................... 11

5.2 Architectural requirements ............................................................................................................................... 12

5.2.1 General ........................................................................................................................................................ 12

5.2.2 ANP - Access Network Provider ................................................................................................................ 13

5.2.3 VSP - Voice Service Provider..................................................................................................................... 13

5.2.4 ECSP - Emergency Call Service Provider .................................................................................................. 13

5.2.5 PSP - PSAP Service Provider ..................................................................................................................... 14

5.3 Interfaces .......................................................................................................................................................... 14

5.3.1 Interface definitions .................................................................................................................................... 14

5.3.2 Information flows ....................................................................................................................................... 16

5.3.2.1 ia interface ............................................................................................................................................. 16

5.3.2.2 ib interface............................................................................................................................................. 17

5.3.2.3 ic interface ............................................................................................................................................. 17

5.3.2.4 id interface............................................................................................................................................. 18

5.3.2.5 ie interface ............................................................................................................................................. 18

5.3.2.6 if interface ............................................................................................................................................. 18

5.3.2.7 ig interface............................................................................................................................................. 19

5.3.2.8 ih interface............................................................................................................................................. 19

5.3.2.9 ii interface ............................................................................................................................................. 20

5.3.2.10 ij interface ............................................................................................................................................. 21

5.3.2.11 ik interface............................................................................................................................................. 22

5.3.2.12 il interface ............................................................................................................................................. 22

5.3.2.13 im interface ........................................................................................................................................... 23

5.3.2.14 in interface............................................................................................................................................. 23

5.4 Functional entities ............................................................................................................................................ 24

5.4.1 ANP ............................................................................................................................................................ 24

5.4.1.1 Location Server (LS) ............................................................................................................................. 24

5.4.2 VSP ............................................................................................................................................................. 25

5.4.2.1 VSP Call Control .................................................................................................................................. 25

5.4.3 ECSP ........................................................................................................................................................... 26

5.4.3.1 ESRF ..................................................................................................................................................... 26

5.4.3.2 LS Proxy ............................................................................................................................................... 26

5.4.3.3 Other entities ......................................................................................................................................... 26

5.4.4 PSAP Service Provider ............................................................................................................................... 27

5.4.4.1 Emergency Service Routeing Proxy...................................................................................................... 27

5.4.4.2 Route Server .......................................................................................................................................... 27

5.4.4.3 Other entities ......................................................................................................................................... 27

5.4.5 other functional entities .............................................................................................................................. 28

5.4.5.1 Location Server Discovery Function ..................................................................................................... 28

5.4.5.2 User Equipment ..................................................................................................................................... 28

5.4.5.3 IP-PSAP ................................................................................................................................................ 28

5.4.5.4 PSTN-PSAP .......................................................................................................................................... 28

5.5 Information flow diagrams ............................................................................................................................... 29

5.5.1 Introduction................................................................................................................................................. 29

5.5.2 ANP provides a location value ................................................................................................................... 29

5.5.3 ANP provides location reference to the VSP and the ECSP pulls location value ....................................... 31

5.5.4 ANP provides to the VSP a location identifier ........................................................................................... 32

5.5.5 ANP provides location identifier to the VSP and the PSAP pulls location value ....................................... 34

5.6 Extension of the Functional Architecture for Networks with VPN, NAT/PAT and other components

which change Packet Flow Identity .................................................................................................................. 35

5.7 Extension of the Functional Architecture to support VSP Aggregation Providers ........................................... 35

6 Protocol and other requirements ............................................................................................................. 36

6.1 Generic requirements ....................................................................................................................................... 36

6.2 Trust relationships ............................................................................................................................................ 36

Annex A (normative): Extension of the Functional Architecture for Networks with VPN,

A.1 General ................................................................................................................................................... 37

A.2 LS chaining solution ............................................................................................................................... 37

A.2.1 Location chaining interface impacts ................................................................................................................. 39

A.3 HOST_ID solution ................................................................................................................................. 39

Annex B (informative): M/493 Scope ................................................................................................... 43

Annex C (normative): Extension of the Functional Architecture to support an aggregating

VSP .................................................................................................................. 44

C.1 General ................................................................................................................................................... 44

C.2 Architectual requirements for VSP Aggregation Provider (VAP) ......................................................... 44

C.3 Extended Interface definition ................................................................................................................. 45

C.4 VSP Aggregating Entity ......................................................................................................................... 45

Annex D (informative): Avoiding authentication between the VSP and the ANP............................ 46

History .............................................................................................................................................................. 48

IPRs essential or potentially essential to the present document may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

This ETSI Standard (ES) has been produced by ETSI Project End-to-End Network Architectures (E2NA).

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

The present document describes the unified functional architecture to support requirements as outlined in European

Commission (EC) mandate M/493 [i.4] on emergency caller location determination and transport, in particular for the

case where the VoIP service provider and one or several network operators - all serving the customer in the

establishment of an emergency call - are independent enterprises needing to co-operate to determine the location of the

(nomadic) caller. The architecture identifies all necessary interfaces, which are needed to fulfil the requirements

outlined in EC Mandate M/493 [i.4], and provides a basis for the specification of the protocols to be used on those

The present document is applicable to both NGN and pre-NGN IP-based networks. The architecture defined in the

present document is intended to be compatible with IMS-based deployments but does not require compliance to IMS

This architecture does not intend to replace existing deployed solutions. It should enable operators and undertakings

providing services to realize transmission of location information to the Public Safety Answering Point.

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

Referenced documents which are not found to be publicly available in the expected location might be found at

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

The following referenced documents are necessary for the application of the present document.

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

The following referenced documents are not necessary for the application of the present document but they assist the

[i.1] ETSI TS 123 167: "Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia

[i.2] IETF RFC 6967: "Analysis of Potential Solutions for Revealing a Host Identifier (HOST-ID) in

[i.3] Draft-boucadair-intarea-host-identifier-scenarios-03 (March 2013): "Host Identification: Use

[i.4] M/493: "Standardisation Mandate to the European Standards Organisations (ESO) in support of

[i.5] IETF RFC 6753: "A Location Dereference Protocol Using HTTP-Enabled Location Delivery

[i.6] ETSI TS 102 181: "Emergency Communications (EMTEL); Requirements for communication

[i.7] ETSI TS 102 650: "Telecommunications and Internet converged Services and Protocols for

Advanced Networking (TISPAN); Analysis of Location Information Standards produced by

[i.8] Directive 2002/22/EC of the European Parliament and of the Council of 7 March 2002 on

universal service and users' rights relating to electronic communications networks and services

[i.9] Commission Recommendation 2003/558/EC of 25 July 2003 on the processing of caller location

information in electronic communication networks for the purpose of location-enhanced

[i.11] IETF RFC 4848: "Domain-Based Application Service Location Using URIs and the Dynamic

For the purposes of the present document, the following terms and definitions apply:

access network: portion of the telecommunications network that provides access to the switching function and

Access Network Provider (ANP): service provider that provides physical and IP connectivity to a user equipment

NOTE: The access network may be provided by a single organization or it may be provided by a number of

different organizations, BUT the interfaces between these organizations are not relevant to the scope of

the present document as it is matter of contractual relations between the parties.

emergency call: call from a user to an emergency call centre, PSAP or similar agency charged with routeing calls to the

emergency call facilities: mechanisms provided by public or private communications networks, emergency telephone

stanchions/boxes, fire alarms, etc. the use of which enables emergency calls to be made

Emergency Call Service Provider (ECSP): service provider that acts as a mediator between the voice service

emergency caller: individual placing an emergency call to reach the suitable PSAP

emergency response organization: local or national force established to provide assistance to citizens in the event of

their being involved in an emergency situation and requiring specialized help, for example, the police, fire service and

emergency service: service that provides immediate and rapid assistance in situations where there is a direct risk to life

or limb, individual or public health or safety, to private or public property, or the environment but not necessarily

emergency situation: abnormal situation of serious nature that develops suddenly and unexpectedly, of which the

evolution is uncertain and which may turn into a crisis or cause damage and casualties

FlowChanger: device in an IP flow, which changes the packet flow identity, for example changing the IP address

and/or port, so the UE can no longer be identified in the original access network

NOTE: A location value can be obtained from a location identifier by applying a static mapping or the location

identifier may be encoded in such a way that it contains a location value (e.g. a ZIP code).

location information: location value, and/or a location identifier and/or a location reference

location reference: identifies a location server and provides sufficient information to allow the location server to

network-provided location information: any location information pertaining to the calling device that is determined,

Next Generation Network (NGN): packet-based network able to provide telecommunication services and able to

make use of multiple broadband, QoS-enabled transport technologies and in which service-related functions are

NOTE: A nomadic user can make calls from different locations. However, unlike a mobile user, the location of a

packet flow identity: all network parameters, which unambiguously identify a IP flow

PSAP Service Provider: service provider that provides connectivity to Public Safety Answering Points (PSAPs) and

Public Safety Answering Point (PSAP): physical location where emergency calls are received under the responsibility

telecommunication: any transmission, emission, or reception of signs, signals, writing, images, sounds or intelligence

user access: point of connection to a telecommunication network from which a call can be placed

user-provided location information: any location information originating from user-equipment that is not

Voice Service Provider (VSP): specific type of application service provider that provides voice related services and

VSP Aggregation Provider (VAP): provider that a VSP or group of VSPs can use to support call routing to remote