ETSI TR 103 140 V1.1.1 (2014-04)

Mobile Standards Group (MSG); eCall for VoIP

DTR/MSG-00eCall03

General Information

• Status: Published
• Publication Date: 10-Apr-2014
• Technical Committee: MSG - Mobile Standards Group
• Current Stage: 12 - Completion
• Due Date: 16-Apr-2014
• Completion Date: 11-Apr-2014

Standards Content (Sample)

ETSI TR 103 140 V1.1.1 (2014-04)






Technical Report
Mobile Standards Group (MSG);
eCall for VoIP

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2 ETSI TR 103 140 V1.1.1 (2014-04)



Reference
DTR/MSG-00eCall03
Keywords
ecall, IMS, LTE, UMTS
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© European Telecommunications Standards Institute 2014.
All rights reserved.

TM TM TM
DECT , PLUGTESTS , UMTS and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members.
TM TM
3GPP and LTE are Trade Marks of ETSI registered for the benefit of its Members and
of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI

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3 ETSI TR 103 140 V1.1.1 (2014-04)
Contents
Intellectual Property Rights . 6
Foreword . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 7
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 Introduction and General requirement . 11
4.1 Context . 11
4.2 General considerations for IMS eCall . 12
5 Non IMS solutions . 12
5.1 In-band modem over VoIP . 12
5.2 eCall over LTE with CS Fallback . 13
5.3 eCall over LTE using Over The Top services (OTT) . 13
5.4 ITS-Stations . 13
6 IMS solution for eCall . 14
6.1 Aspects of IMS eCall . 14
6.1.1 General . 14
6.1.2 eCall Architectural principles . 14
6.1.2.1 General . 14
6.1.2.2 eCall Flag . 14
6.1.2.3 Voice and any additional media sessions . 14
6.1.2.4 Transfer of MSD data. 15
6.1.2.5 Location information of the vehicle . 15
6.1.2.6 Caller identity . 15
6.1.2.7 Identifying network support for eCall over IMS . 15
6.1.2.8 Mobility management and session management for IMS eCall . 16
6.1.2.8.1 Mobility management . 16
6.1.2.8.2 Session management . 16
6.1.2.9 Call-back for eCall . 17
6.1.2.10 USIM configuration . 17
6.1.2.11 AT Command . 18
6.1.3 IMS eCall key implementation principles . 18
6.1.3.0 General . 18
6.1.3.1 Key Issue #1: indicating the eCall Flag. 18
6.1.3.1.1 Solution #1 . 18
6.1.3.1.2 Solution #2 . 19
6.1.3.1.3 Solution #3 . 19
6.1.3.2 Key Issue #2: Transfer of MSD data . 19
6.1.3.2.1 Solution #1 . 19
6.1.3.2.2 Solution #2 . 20
6.1.3.2.3 Solution #3 . 20
6.1.3.2.4 Solution #4 . 20
6.1.3.2.5 Solution #5 . 21
6.1.3.2.6 Solution #6 . 21
6.1.3.2.7 Solution #7 . 22
6.1.3.3 Key Issue #3: Security and Privacy of the MSD . 22
6.1.3.3.1 Solution #1 . 22
6.1.3.4 Key Issue #4: PSAP request for updated MSD . 22
ETSI

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4 ETSI TR 103 140 V1.1.1 (2014-04)
6.1.3.4.1 Solution #1 . 22
6.1.3.4.2 Solution #2 . 23
6.1.3.4.3 Solution #3 . 23
6.1.3.5 Key Issue #5: Mobility Management - eCall inactive mode . 23
6.1.3.5.1 Solution #1 . 23
6.1.3.6 Key Issue #6: Session Management - Limiting the sessions . 24
6.1.3.6.1 Solution #1 . 24
6.1.3.6.2 Solution #2 . 24
6.1.3.7 Key Issue #7: Mobility Management and Session Management - attaching and requesting eCall
session . 24
6.1.3.7.1 Solution #1 . 24
6.1.3.7.2 Solution #2 . 25
6.1.3.7.3 Solution #3 . 25
6.1.3.7.4 Solution #4 . 26
6.1.3.7.5 Solution #5 . 26
6.1.3.8 Key Issue #8: Where to specify changes to SIP messages . 26
6.1.3.8.1 Solution #1 . 26
6.1.3.8.2 Solution #2 . 27
6.1.3.9 Key Issue #9: Identifying network support for IMS eCall . 27
6.1.3.9.1 Solution #1 . 27
6.1.3.10 Key Issue #10: PSAP acknowledgment to the IVS (receiving the MSD) . 27
6.1.3.10.1 Solution #1 . 27
6.1.3.10.2 Solution #2 . 28
6.1.3.11 Key Issue #11: defining identification for IMS eCall reconfiguration and test service . 28
6.1.3.11.1 Solution #1 . 28
6.1.4 Recommended solution . 29
6.1.5 Alternative Solution . 29
6.1.6 Open issues . 30
6.2 Work required in 3GPP . 30
6.2.1 SA1 . 30
6.2.2 SA2 . 30
6.2.3 CT1 . 30
6.2.4 CT6 . 30
6.2.5 RAN2 . 31
6.2.6 RAN5 . 31
6.3 Work required in IETF . 31
7 Co-existence of CS and IMS eCall . 31
7.1 Considerations . 32
7.1.1 IVS assumptions . 32
7.1.2 Mobile Network Operator considerations . 32
7.1.3 PSAP assumptions . 32
7.2 Migration scenarios . 33
7.2.1 General . 33
7.2.2 Description of scenarios . 33
7.2.2.1 Initial scenarios with FG-eCall . 35
7.2.2.2 Scenarios where even FG-eCall is not possible . 35
7.2.2.3 Scenarios where NG-eCall is possible . 35
7.2.2.4 Scenarios 11 with NG-IVS, IMS eCall coverage, but with FG-PSAP . 35
7.3 TPS eCall. 35
8 Conclusions and recommendations . 36
8.1 Conclusions . 36
8.2 Potential advantages of IMS eCall vs. CS eCall . 36
8.3 Recommendations for next steps . 36
Annex A: Change requests . 38
Annex B: eCall and ITS . 39
B.1 Evolution of 'Intelligent Transport Systems' . 39
B.2 "Communications Access for Land Mobiles" (CALM) . 43
ETSI

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5 ETSI TR 103 140 V1.1.1 (2014-04)
Annex C: Characterization of the eCall in-band modem Performance over 3GPP VoIP. 44
C.1 Introduction . 44
C.2 eCall simulation framework/test setup . 44
C.3 The Dynamic Adaptive de-jitter buffer . 45
C.4 Simulation Test Runs & Results . 46
C.5 Static dejitter buffer . 48
Annex D: Potential future enhancements of eCall . 49
D.1 General . 49
D.2 More comprehensive data set(s) . 49
D.3 Wider range of support services . 50
D.4 Wider range of users. 51
D.4.1 Commercial vehicles . 51
D.4.2 Powered two wheel vehicles . 51
D.4.3 Unpowered vehicles (bicycles, etc.) . 52
D.4.4 Vulnerable road users (visually, physically, mentally challenged) . 52
D.4.5 Personal eCall . 52
D.4.6 Evolution to LTE/4G (E-UTRAN) . 53
D.4.7 Inclusion in a general on-board telematics platform . 53
D.4.8 eCall features enhancement . 53
D.4.8.1 Removal of muting requirements . 53
D.4.8.2 Removal of 140 byte limit and provision of bidirectionality unidirectionality . 53
D.4.8.3 Option to provide video link between PSAP and occupants of the vehicle . 54
D.4.8.4 Option to enable PSAP to access onboard cameras to gain a first hand visual assessment of the crash
site situation . 54
Annex E: Potential conformance test cases for IMS eCall . 55
E.1 Introduction . 55
E.2 Test environment . 55
E.3 Test cases . 55
E.3.1 Test Case 1A: Manually initiated IMS eCall using eCall-only UE, call-back required and performed . 55
E.3.2 Test Case 1B: Manually initiated IMS eCall using eCall-only UE, call-back not required . 56
E.3.3 Test Case 2A: Automatically initiated eCall, call-back required and performed . 57
E.3.4 Test Case 2B: Automatically initiated eCall, call-back not required . 57
E.3.5 Test Case 3: Test eCall using eCall-only UE to a test point PSAP . 58
E.3.6 Test Case 4: Reconfiguration call of eCall-only UE . 58
E.3.7 Test Case 5: eCall state before and after inactivity timer T34XX expiry . 59
E.3.8 Test Case 6: eCall state before and after inactivity timer T34XY expiry . 59
E.3.9 Other test cases . 60
Annex F: Bibliography . 61
History . 64

ETSI

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6 ETSI TR 103 140 V1.1.1 (2014-04)
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 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 (http://ipr.etsi.org).
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
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Report (TR) has been produced by ETSI Technical Committee Mobile Standards Group (MSG).
Introduction
Current eCall is based on CS emergency call in GSM and UMTS networks.
LTE spectrum auctions are taking place in the EU and there will be extensive LTE coverage before the implementation
of eCall becomes mandatory in 2015. The longevity of GSM networks in the EU over the lifetime of vehicles is
uncertain and GSM spectrum is likely to be re-allocated for UMTS and/or LTE. There is no CS emergency call in LTE.
The applicability of the existing technical solution for eCall (in-band modem) should be assessed for VoIP/VoLTE, as
well as new technical solutions to be developed that are suitable for packet switched (UMTS and LTE) and offer better
performance for eCall for VoIP.
Longer term strategies need to be considered and guidance (probably for further work) provided in respect of the long
term migration of eCall to support over packet switched networks, and the co-existence and possible integration of
eCall and other ITS communication equipment installed in vehicles.
ETSI

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7 ETSI TR 103 140 V1.1.1 (2014-04)
1 Scope
The present document contains the findings of STF456. The following areas are addressed:
• Assessment of in-band modem solution in case of no use of CS bearers.
• Study the adaptation of IMS emergency call and IMS Multimedia Emergency Service for supporting current
and future service required by eCall.
• Hybrid CS/IMS solution.
• Migration options and recommendations.
2 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 version 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
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are necessary for the application of the present document.
Not applicable.
2.2 Informative references
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] Next-Generation Pan-European eCall, draft-gellens-ecrit-ecall-01.
NOTE: Available at http://tools.ietf.org/html/draft-gellens-ecrit-ecall-01.
[i.2] ETSI TS 122 101: "Universal Mobile Telecommunications System (UMTS); Service aspects;
Service principles (3GPP TS 22.101 Release 8)", eCall requirements for data transmission.
[i.3] ETSI TS 124 008: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Mobile radio interface Layer 3 specification; Core
network protocols; Stage 3 (3GPP TS 24.008)", eCall Discriminator Table 10.5.135d.
[i.4] ETSI TS 126 268: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); eCall data transfer; In-band modem solution; ANSI-C
reference code (3GPP TS 26.268)", eCall Data Transfer - ANSI-C Reference Code.
[i.5] ETSI TR 126 969: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); eCall data transfer; In-band modem solut
...