ETSI TS 103 269-2 V1.1.1 (2015-01)

ETSI TS 103 269-2 V1.1.1 (2015-01)






TECHNICAL SPECIFICATION
TETRA and Critical Communications Evolution (TCCE);
Critical Communications Architecture;
Part 2: Critical Communications application
mobile to network interface architecture

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2 ETSI TS 103 269-2 V1.1.1 (2015-01)



Reference
DTS/TCCE-04187
Keywords
broadband, radio, security, TETRA
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3 ETSI TS 103 269-2 V1.1.1 (2015-01)
Contents
Intellectual Property Rights . 7
Foreword . 7
Modal verbs terminology . 7
1 Scope . 8
2 References . 8
2.1 Normative references . 8
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 Architecture overview . 11
4.1 Architecture reference . 11
4.2 Configurations . 12
4.2.1 Single CCA system . 12
4.2.2 Multi-CCA system . 14
4.2.3 Interconnection with legacy . 14
5 Components . 14
5.1 Mobile unit . 14
5.2 Access sub-systems . 15
5.3 Critical Communication Application. 15
5.3.1 Access interfaces . 15
5.3.1.1 Application control interface . 15
5.3.1.2 Media unicast interface . 16
5.3.1.3 Media multicast interface . 16
5.3.1.4 Unicast bearer control interface . 16
5.3.1.5 Multicast bearer control interface . 16
5.4 CCA functional entities . 16
5.4.1 SIP application server . 16
5.4.2 Mobility management . 16
5.4.3 Group management . 17
5.4.4 Resource management . 17
5.4.5 Application server . 17
5.4.6 Media distribution . 17
5.4.7 Security . 17
6 Reference points and protocols . 18
6.1 Identities and protocols . 19
6.1.1 Application level identities . 19
6.1.2 Transport protocols . 19
6.1.2.1 Unicast transport . 20
6.1.2.2 Multicast transport . 20
6.1.2.3 Control of unicast/broadcast transport over LTE . 20
6.1.3 Network layer protocols . 21
6.1.4 Application layer protocols . 21
6.1.4.1 Pseudo-broadcast protocol . 21
6.2 Standardised application codecs . 21
6.2.1 Voice Codec. 21
6.2.2 Video Codec . 22
7 Overview of services . 22
7.1 CCA system access . 22
7.2 Service registration . 22
7.2.1 Home network registration . 22
ETSI

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4 ETSI TS 103 269-2 V1.1.1 (2015-01)
7.2.2 Migration registration . 23
7.2.3 Registration procedure . 24
7.2.4 Periodic update . 25
7.2.5 Deregistration . 25
7.3 Individual streaming communication . 26
7.3.1 Individual unit to unit call with on/off hook signalling . 26
7.3.2 Individual unit to unit call with direct signalling . 27
7.3.3 Individual unit to telephony call (outgoing call) . 28
7.3.4 Individual unit to telephony call (incoming call) . 30
7.4 Group streaming communication . 31
7.4.1 Broadcast and system call . 32
7.4.2 Group communication coverage . 32
7.4.3 Group provisioning . 33
7.4.4 Group affiliation . 33
7.4.4.1 Relation between group affiliation and mobility . 34
7.4.5 Session join and call start . 34
7.4.6 Late entry . 35
7.4.7 Message exchanges related to group call . 35
7.4.7.1 Group subscription and affiliation . 35
7.4.7.2 Joining a session . 36
7.4.7.3 Non acknowledged group communication . 37
7.4.7.3.1 Group call combined with session join . 37
7.4.7.3.2 Group call in pre-joined session . 40
7.4.7.4 Acknowledged or ringing group communication . 41
7.4.7.5 Bearer control . 43
7.5 Push-to-talk management procedures . 43
7.5.1 Initial allocation of right to transmit . 43
7.5.2 Releasing the right to transmit . 43
7.5.3 Requesting the right to transmit . 44
7.5.4 Interrupting a granted transmission. 44
7.5.5 Suspending a transmission . 46
7.5.6 End of call . 46
7.6 Call modification . 47
7.7 Management of priority and pre-emption . 47
7.7.1 Provisioned priority . 47
7.7.2 Setup priority . 48
7.7.3 Push-to-talk priority . 48
7.7.4 Scanning priority . 48
7.7.5 Resource allocation priority and resource retention . 48
7.8 Status and messaging. 49
7.8.1 Standard defined status . 49
7.8.1.1 Emergency status . 49
7.8.1.2 Call alert . 49
7.8.1.3 Urgent call back . 49
7.8.1.4 Ambience listening call request . 49
7.8.1.5 Ambience listening urgent call request . 49
7.8.1.6 Scanning on and off . 49
7.8.1.7 Transmit inhibit on and off . 50
7.8.2 Messaging . 50
7.8.2.1 Message broadcast . 50
7.9 Presence . 50
7.10 Localisation and geographic information . 51
7.10.1 Mode of transmission. 51
7.10.2 Assisted location . 51
7.11 Supplementary services . 51
7.11.1 Ambience Listening . 51
7.11.2 Talking party and calling party identity . 51
7.11.3 Dynamic group number allocation and group merging . 52
7.11.4 Disabling and enabling . 52
7.11.5 Call forwarding . 52
7.11.5.1 Call forwarding unconditional . 52
7.11.5.2 Call forwarding on busy subscriber and on no reply . 53
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5 ETSI TS 103 269-2 V1.1.1 (2015-01)
7.11.6 Call barring . 53
7.11.6.1 Barring of outgoing calls . 53
7.11.6.2 Barring of incoming calls . 53
7.11.7 Call waiting and call hold . 53
7.11.8 Discreet listening . 54
7.11.9 Call transfer . 54
7.11.10 Area restriction . 54
7.11.11 Tracing & Recording . 54
7.12 Principles for mobility management . 54
7.12.1 Roaming and Migration . 54
7.12.2 Media gateway re-allocation . 55
8 Addressing and identities . 56
8.1 Identifiers . 56
8.2 List identifiers . 56
Annex A (informative): Analysed services and requirements . 57
History . 66

ETSI

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6 ETSI TS 103 269-2 V1.1.1 (2015-01)
Figures
Figure 1: CCS Reference Model .12
Figure 2: Functional architecture.13
Figure 3: Multi-CCAS system .14
Figure 4: Reference points .18
Figure 5: MU to CCAS interface, control plane part.19
Figure 6: MU to CCAS interface, media plane unicast part .19
Figure 7: MU to CCAS interface, media plane multicast part.20
Figure 8: Home registration .23
Figure 9: Migration registration .24
Figure 10: Message sequence chart for registration process .25
Figure 11: Message sequence chart for a successful individual unit-to-unit call setup .27
Figure 12: Message sequence chart for a successful individual unit-to-unit call setup with direct signalling .28
Figure 13: Message sequence chart for outgoing call to an external subscriber.29
Figure 14: Message sequence chart for incoming call from an external subscriber .31
Figure 15: Message sequence chart for subscription and affiliation .35
Figure 16: Message sequence chart for joining a session .36
Figure 17: Message sequence chart for infrastructure initiated session join .36
Figure 18: Non-acknowledged group call setup including session join, using unicast bearers .37
Figure 19: Non-acknowledged group call setup with multicast bearer for receiving parties .38
Figure 20: Non-acknowledged group call at session join time with call queuing .39
Figure 21: Non-acknowledged group call setup with pre-joined session .40
Figure 22: Non-acknowledged queued group call setup pre-joined session .41
Figure 23: Acknowledged group call setup with session join .42
Figure 24: Rejection of talking party interruption .44
Figure 25: Processing of a request to transmit without pre-emption .45
Figure 26: Stopping a granted transmission .46

ETSI

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7 ETSI TS 103 269-2 V1.1.1 (2015-01)
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 Specification (TS) has been produced by ETSI Technical Committee TETRA and Critical
Communications Evolution (TCCE).
The present document is part 2 of a multi-part deliverable covering TETRA and Critical Communications Evolution
(TCCE); Critical Communications Architecture, as identified below:
TR 103 269-1: "Critical Communications Architecture Reference Model";
TS 103 269-2: "Critical Communications application mobile to network interface architecture".
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "need not", "will",
(Verbal forms
"will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules
for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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8 ETSI TS 103 269-2 V1.1.1 (2015-01)
1 Scope
The present document presents an overview of the architecture for a generic mission critical service for use by a Critical
Communications Application in network and terminal over a broadband IP bearer, with specific focus for LTE. The
architecture is part of the overall Critical Communications Architecture Reference Model, described in
ETSI TR 103 269-1 [1]. The overall architecture and services are described and the implementation of services
equivalent to the existing narrowband technologies, for example those in TETRA and Tet
...