1、 ETSI TR 103 393 V1.1.1 (2016-03) Emergency Communications (EMTEL); Advanced Mobile Location for emergency calls TECHNICAL REPORT ETSI ETSI TR 103 393 V1.1.1 (2016-03) 2 Reference DTR/EMTEL-00035 Keywords emergency, location ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +
2、33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made availabl
3、e in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only pre
4、vailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ET
5、SI documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilize
6、d in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to repr
7、oduction in all media. European Telecommunications Standards Institute 2016. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of th
8、e 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 103 393 V1.1.1 (2016-03) 3 Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g3Introduction 4g31 Scope 5g32 References 5g32.1 Normative referen
9、ces . 5g32.2 Informative references 5g33 Abbreviations . 6g34 General Description 6g34.1 Overview 6g35 Location transport 6g35.1 Use of SMS in a single country where a PSAP obtains mobile location from a centralized location server 6g35.2 Use of SMS when roaming. 7g35.3 Using a data push across the
10、mobile network . 7g36 Handset Considerations 8g36.1 Overview 8g36.2 Process Automation 8g36.3 Battery Life 8g36.4 Positioning Methods . 9g36.5 Limited Service State . 10g36.6 Repeat 112 Voice Calls 11g37 Mobile Network considerations . 11g38 Specification for location message content 11g39 Conclusio
11、ns and Recommendations and Future Outlook 12g3Annex A: Location message - SMS format 14g3Annex B: Example AML Messages 17g3Annex C: Overview of AML Implementation in the UK 18g3C.1 General . 18g3C.2 Use of SMS in the UK for handsets produced for the UK - current AML implementation . 18g3History 20g3
12、ETSI ETSI TR 103 393 V1.1.1 (2016-03) 4 Intellectual Property Rights 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
13、 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 server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy,
14、 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 server) which are, or may be, or may become, essential to the present document. Foreword This Technic
15、al Report (TR) has been produced by ETSI Special Committee Emergency Communications (EMTEL). Modal verbs terminology 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
16、 ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. Introduction One of the biggest challenges facing the Emergency Services is determining the location of mobile callers. Cell based loc
17、ation has been available to the Emergency Services for more than 10 years. While cell data can help with verbal establishment of a callers location, a more precise location will allow an even quicker emergency response. Ambulance Service measurements show that, on average, 30 seconds per call can be
18、 saved if a precise location is automatically provided, and several minutes can be saved where callers are unable to verbally describe their location due to stress, injury, language or simple unfamiliarity with an area. In the UK alone it is estimated that each year there are about 36 000 cases wher
19、e the Emergency Services have to spend a significant amount of time searching for a caller because a location could not be verbally provided. Advanced Mobile Location (AML) allows use of native smart phone technology to pass (Assisted) GNSS or WiFi based location data to Emergency Service PSAPs. The
20、se technologies can provide a location precision as good as 5 metres outdoors (and averaging to within circular areas of 25 m radius for indoor locations), a significant improvement on existing cell coverage provided by mobile networks, which average (across the UK) circular areas of about 1,75 km r
21、adius. The present document builds on the Advanced Mobile Location initiative that has been piloted in the UK and shown to improve the precision and accuracy of a callers location information for emergency calls from mobile handsets. ETSI ETSI TR 103 393 V1.1.1 (2016-03) 5 1 Scope The scope of the p
22、resent document is to: Consider how AML can be used with different PSAP, and Location Delivery to PSAP, arrangements that exist in Europe. Consider how AML can be extended to cover the case of handsets that roam. Optimize the content of a location message to be of most use to the emergency services.
23、 Provide a reference on AML for administrations, mobile networks and handset manufacturers. The present document focusses on circuit switched emergency voice calls and location transport via SMS, but provides an outlook to other technologies suitable the future. A review of how AML has been implemen
24、ted in the UK is contained in Annex C. 2 References 2.1 Normative references 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 ve
25、rsion of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at https:/docbox.etsi.org/Reference/. NOTE: While any hyperlinks included in this clause were valid at the time of publication
26、, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. Not applicable. 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non
27、 specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long
28、 term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 IETF RFC 6881: “Best Current Practice for Communications Services in Support of Emergency Calling“. i.2 ETSI TS 123
29、167: “Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS) emergency sessions (3GPP TS 23.167)“. i.3 ETSI TS 124 229: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; IP multimedia call control protocol b
30、ased on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3 (3GPP TS 24.229)“. ETSI ETSI TR 103 393 V1.1.1 (2016-03) 6 3 Abbreviations For the purposes of the present document, the following abbreviations apply: AML Advanced Mobile Location BT British Telecommunications
31、 GMLC Gateway Mobile Location Centre GNSS Global Navigation Satellite System GPS Global Positioning System HTTPS Hypertext Transfer Protocol Secure IMEI International Mobile Equipment Identifier IMS Internet protocol Multimedia Subsystem IMSI International Mobile Station Identity LSS Limited Service
32、 State MAC Media Access Control MCC Mobile Country Code ML Message Length MNC Mobile Network Code MSISDN Mobile Station International Subscriber Directory Number NTP Network Time Protocol PSAP Public Safety Answering Point SIM Subscriber Identity Module SIP Session Initiation Protocol SMPP Short Mes
33、sage Peer to Peer SMSC Short Message Service Centre SSID Service Set Identification TS12 Teleservice 12UTC Coordinated Universal Time (literally Universel Temps Coordonn) WGS84 World Geodetic System 1984 XML Extensible Markup Language 4 General Description 4.1 Overview AML functionality is triggered
34、 by a TS12 emergency call (which is unaffected), and is designed to supplement the basic network location feed wherever possible, i.e. with some acknowledgement of limitations in GNSS or WiFi availability for the handset and the time required to acquire location using GNSS. Location information esta
35、blished by the handset, using its built-in GNSS and WiFi connectivity, together with user plane assistance data from a handset-selected service where available, is transported (e.g. through use of SMS) to the emergency service PSAPs. Handset locations obtained through the AML functionality are compa
36、red to the location provided by mobile network GMLCs (currently using basic cell coverage information), using an algorithm that analyses factors such as time of positioning and the separation of the two locations. This is to validate any handset location information provided, to ensure it is consist
37、ent with the network location. It is important that AML does not interfere with the voice call so both the handset and mobile network should be configured to be able to simultaneously support a standard 3GPPTMmobile emergency voice call, location determination using GNSS/WiFi capabilities and SMS tr
38、ansmission of the location over the 3GPP mobile network. 5 Location transport 5.1 Use of SMS in a single country where a PSAP obtains mobile location from a centralized location server When the location is determined by the device it can be sent using a simple SMS message. ETSI ETSI TR 103 393 V1.1.
39、1 (2016-03) 7 SMS offers the widest possible geographic coverage, especially in remote areas, is reliable to a fixed destination and is robust - if a voice emergency call can be made an SMS is also possible. SMS is a store and forward service and therefore instantaneous delivery is not guaranteed. H
40、owever, in a current AML implementation, SMS from a mobile to a fixed location offers reliable performance. SMS emergency location messages should not be charged to end users. NOTE: Zero rate billing is already applied by mobile networks to SMSs to 112 in some countries. An SMS message is initially
41、routed to the home networks SMSC. SMSCs should be programmed to send an emergency location SMS (identified by an SMS number such as 112, or a dedicated full length MSISDN of the PSAP) via an SMS gateway to a server operated by, or on behalf of, the PSAP that is running an AML location processing app
42、lication (the AML Server). The AML Server compares the information from the handset with location information from the mobile network for the MSISDN of the emergency caller, before making it available to the PSAPs existing location server. An example of this currently used in the UK is shown in clau
43、se C.1. Resilience of the servers and the interconnecting links should meet national targets. 5.2 Use of SMS when roaming If an end user from country A roams to another European country (country B), and makes a 112 call, then the 112 voice call is routed to a local PSAP in visited country B, but the
44、 SMS is returned to the SMSC in country A for routing. If 112 was used as destination for the emergency location SMS, the SMSC in country A would simply direct it to the AML Server in country A where it cannot currently be used (no path to AML Server in visited country B). The visited country in whi
45、ch the mobile handset is operating can be determined by the handset using the Mobile Country Code (MCC) component of the current serving cell ID. The mobile handset also has information about the Mobile Network being used (e.g. for charging information) and the cell information. One option is for th
46、e mobile handset to then look-up an SMS number (in a regularly updated handset database) to which to route the emergency location SMS specific to the visited country - as long as this is a full length MSISDN the home country SMSC should then be able to route it to the visited countrys location proce
47、ssing server (i.e. the AML Server in country B). Charging arrangements between mobile networks should be agreed to zero rate such SMS messages for end users. Which server can be selected to be the visited countrys location processing server will be dependent on the current infrastructure within that
48、 country - in some cases it could be a server within the PSAP that already receives the GMLC network location information from mobile networks, which will need to be upgraded to receive the content of the AML SMS. A second option is that if it is not possible to use a full length MSISDN for each cou
49、ntry, then where the AML Server in country A does have links to other countries across Europe, the Mobile Country Code and Mobile Network Code should be used to forward the AML information from the AML Server in the home country (country A) to the PSAPs AML Server/location processing server in the visited country. 5.3 Using a data push across the mobile network Data push across a mobile network is an alternative option to using SMS transport that may also be adopted if the data connectivity is considered to be sufficiently widespread and reliable to use
