ETSI TR 103 269-1 V1.1.1 (2014-07)

ETSI TR 103 269-1 V1.1.1 (2014-07)






TECHNICAL REPORT
TETRA and Critical Communications Evolution (TCCE);
Critical Communications Architecture;
Part 1: Critical Communications Architecture Reference Model

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2 ETSI TR 103 269-1 V1.1.1 (2014-07)



Reference
DTR/TCCE-04189
Keywords
Architecture, Model
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3 ETSI TR 103 269-1 V1.1.1 (2014-07)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 5
3 Definitions and abbreviations . 5
3.1 Definitions . 5
3.2 Abbreviations . 6
4 Architectural Requirements . 6
5 Critical Communication System Architecture . 6
5.1 CCS Reference Model . 6
5.2 Interfaces . 9
5.2.1 [1] IP Core Network - IP Terminal interface . 9
5.2.2 [2] Infra CCA - IP Core Network interface . 9
5.2.3 [3] IP Terminal to Mobile CCA interface . 10
5.2.4 [4] Infra CCA to Mobile CCA interface . 10
5.2.5 [5] Infra CCA to Application interface . 10
5.2.6 [6] Mobile CCA to Mobile Application Interface . 10
5.2.7 [7] Application to Application interface . 10
5.2.8 [8] Inter CCA interface . 10
5.2.9 [8bis] CCA to Legacy PMR interface . 11
5.2.10 [9] Core Network to Core Network interface . 11
5.2.11 [10] IP Terminal to IP Terminal interface . 11
5.2.12 [11] Mobile CCA to Mobile CCA interface . 11
5.2.13 [11bis] Mobile CCA to Repeater CCA interface . 11
5.2.14 [12] Infra CCA to Relay CCA interface . 11
5.2.15 [13] Mobile CCA to Relay CCA interface . 11
6 Services provided by the CCA . 11
6.1 Call Services (Real Time Conversational Services) . 12
6.2 Session Services (Real Time Streaming) . 12
6.3 Professional Supplementary Services . 13
6.4 Data Services (non-Real Time) . 13
6.5 Application Registration Services . 14
7 Roaming and interoperability . 15
7.1 Roaming aspects . 15
7.2 Interoperability between CCAs . 15
7.3 Interoperability between UE CCAs for Proximity Services . 15
7.4 Interoperability with legacy systems . 16
8 Management services . 16
8.1 Management of Mission Critical services for professional users . 16
8.2 QoS management . 16
9 Security aspects . 17
History . 18

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4 ETSI TR 103 269-1 V1.1.1 (2014-07)
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 TETRA and Critical Communications
Evolution (TCCE).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "may not", "need", "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 provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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5 ETSI TR 103 269-1 V1.1.1 (2014-07)
1 Scope
The present document describes an architecture that will allow Critical Communications applications to operate across a
broadband IP network. The IP network may be a wireless network, for example, a 3GPP™ specified LTE™ network.
The various interfaces and reference points that comprise the architecture are detailed within the present document
together with a brief outline of some of the most important services that the architecture supports.
The interfaces described include those relevant to a network to terminal application, a terminal to terminal application,
and network to terminal application via a relay terminal.
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
referenced 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] ETSI TS 122 011: "Digital cellular telecommunications system (Phase 2+); Universal Mobile
Telecommunications System (UMTS); LTE; Service accessibility (3GPP TS 22.011)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
call: a set of exchanges of information between two or more users that takes place in a conversational service
Critical Communication Application (CCA): application providing professional communication services to critical
communication users over broadband IP networks, e.g. LTE networks, and to legacy professional networks
Critical Communication System (CCS): the whole system that is providing Professional Communication Services to
Professional Users
NOTE: The CCS may include Access Network, Core Network, Control Rooms and Applications.
professional operator: operator in charge to provide Critical Communication Services to Professional Users (Public
Safety users, Rail Users, Utility users, other professional users)
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6 ETSI TR 103 269-1 V1.1.1 (2014-07)
session: set of information sent from one user to one or more other users outside a Conversational Service
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ARP Allocation and Retention Priority
CCA Critical Communication Application
CCS Critical Communication System
DMR Digital Mobile Radio
EPC Evolved Packet Core
GSM-R Global System for Mobile communication for Railway application
HSS Home Subscriber Server
LMR Land Mobile Radio
LTE Long Term Evolution
MNO Mobile Network Operator
MVNO Mobile Virtual Network Operator
PMR Professional Mobile Radio or Private Mobile Radio
QCI QoS Class Identifier
QoS Quality of Service
SLA Service Level Agreement
UE User Equipment
4 Architectural Requirements
In order to satisfy the Critical Communication User requirements the Critical Communication System:
• provides generic multimedia individual and group services for Professional Communication to the Application
layer (Control Rooms, Localization Applications and Multimedia Applications);
• addresses several professional markets including: Public Safety, Railway, Utilities;
• has full control of user profiles;
• has full control of security level;
• supports interworking with legacy Professional Networks (TETRA, TETRAPOL, DMR, GSM-R, P25, etc.);
• provides mechanisms ensuring the required level of resiliency;
• controls the resources usage according to users' and communications' priorities;
• supports efficient use of features such as broadcast transport and/or QoS management when these are
available. This is typically the case when the broadband access is an LTE network.
• supports the ability to connect one or more broadband networks to a CCA and allows multiple CCAs to be
connected to a broadband network.
5 Critical Communication System Architecture
5.1 CCS Reference Model
The Critical Communication System architecture model considers the following aspects:
• services and facilities that are provided to professional users;
• reference points / interfaces for the user plane and control plane between the CCA, Core IP Network(s) (e.g.
LTE network) and legacy professional networks;
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7 ETSI TR 103 269-1 V1.1.1 (2014-07)
• reference points / interfaces for the user plane and control plane between the CCA and Application Layer;
• reference points / interfaces for the user plane and control plane between the CCAs on terminals (e.g. LTE
UEs) for Proximity scenarios;
rd
• reference points /interfaces to the 3 party application layer functions in the terminal and CCA;
The performance and security aspects of the architecture are also important considerations.
To meet the Mission Critical requirements, the complete architecture of the Critical Communication System, CCS has
to be considered, not only the Critical Communication Application (CCA). The CCS model also includes also the
underlying IP Core Network (e.g. LTE EPC) and other functions.
The CCS Reference Model considered is the following.

Figure 1: CCS Reference Model
In addition, derived reference models apply to the Direct Mode of Operations - see figure 2, to the Terminal to Terminal
Repeater - see figure 3, and to the Terminal to Network Relay - see figure 4.
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8 ETSI TR 103 269-1 V1.1.1 (2014-07)
IP teIP terrmmininaall IP teIP terrmmiinnaall
1010
e.e.g.g. L LTTEE UUEE ee.g.g. LTE LTE UUEE
33 33
CCrriittiiccaall Co Commmmuniunicatcatiions Applons Appliiccatatiioonn
CCrriittiiccaall Co Commmmuniunicatcatiions Applons Appliiccatatiioonn
1111
(M(Mobiobillee CC CCA)A)
(M(Moobbileile CC CCA)A)
66 66
MMoobibille Apple Appliiccatatiionsons MMobiobille Apple Appliiccatatiiononss
77
TTeerrmminalinal TTeerrmminalinal

Figure 2: Direct Mode of Operations Reference Model


Figure 3: Terminal to Terminal Repeater Reference Model
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9 ETSI TR 103 269-1 V1.1.1 (2014-07)

Figure 4: Terminal to Network Relay Reference Model
5.2 Interfaces
5.2.1 [1] IP Core Network - IP Terminal interface
This interface is specified according to the network protocols of the underlying IP network. Where the underlying
network is LTE, it consists of the 3GPP specified LTE UE to EPC interfaces.
5.2.2 [2] Infra CCA - IP Core Network in
...