SIST EN 300 392-11-17 V1.1.2:2003

• Abstract:

  To define the Stage 2 requirements for TETRA SS Include Call

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.10 - Terrestrial Trunked Radio (TETRA)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Mandate: BC-T-344
• Ref Project: ETSI EN 300 392-11-17 V1.1.2 (2002-01) - Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 11: Supplementary services stage 2; Sub-part 17: Include Call (IC)

Overview

SIST EN 300 392-11-17 V1.1.2:2003 defines the Stage 2 requirements for the Supplementary Service Include Call (SS-IC) in Terrestrial Trunked Radio (TETRA) Voice plus Data (V+D) systems. Published by the Slovenian Institute for Standardization (SIST), this standard aligns with European telecommunications efforts to harmonize advanced group communication functionalities in mission-critical radio systems.

The Include Call (IC) feature enables a TETRA served user, already in an active individual or group call, to add additional participants, effectively merging calls into a larger group call scenario. This capability facilitates dynamic operational communication and enhances the flexibility and effectiveness of TETRA networks used by public safety, transportation, and utilities sectors.

Key Topics

• Supplementary Service Include Call (SS-IC): Enables users to include new participants to an ongoing call, transforming individual or existing group calls into expanded group communications.
• Functional Model: The standard details the functional architecture by defining roles such as served user, affected users, SwMIs (Switching and Management Infrastructure), and their interactions.
• Information Flows: Specifies mandatory and optional signaling sequences, such as INVOKE, CANCEL, INFORM, NOT SUBSCRIBED, and NOT SUPPORTED, which support the operational logic of SS-IC.
• Interworking Considerations: Addresses scenarios across multiple TETRA networks and the handling of external network participants, including management of subscription and support information during user migration.
• Allocation to Physical Equipment: Explains mapping of functional entities to actual devices and infrastructure (e.g., TETRA terminals, SwMIs, and gateways).

Applications

The SS-IC feature delivers practical benefits for organizations leveraging TETRA for critical voice and data communications, including:

• Public Safety and Emergency Services: Police, fire, and rescue teams can instantly expand communication groups during unfolding incidents, improving operational coordination and real-time sharing of information.
• Transportation and Utilities: Control center operators can promptly include maintenance or security teams in ongoing dispatch calls, supporting efficient incident response and safety management.
• Secure Group Communications: SS-IC supports dynamic group structuring without service interruption, which is vital for secure, mission-critical environments.
• Multi-Network Operations: The standard ensures robust interworking when users move across different TETRA networks, maintaining service continuity and membership information for Include Call availability.
• Integration with External Networks: TETRA gateways may extend Include Call indications to external networks, broadening the scope of collaborative operations beyond TETRA-exclusive environments.

Related Standards

For comprehensive application and interoperability, SS-IC as defined in SIST EN 300 392-11-17 V1.1.2:2003 references and complements several related standards:

• EN 300 392-2 (TETRA; Voice plus Data; Part 2: Air Interface)
• EN 300 392-3 series (TETRA interworking at Inter-System Interface (ISI))
• EN 300 392-9 (TETRA; General requirements for supplementary services)
• EN 300 392-10-17 (TETRA; Stage 1 description of Supplementary Service Include Call)
• EN 300 392-12-17 (TETRA; Stage 3 protocol support for SS-IC)
• ISO/IEC 11574 (Telecommunications and information exchange between systems - Service description and information flows)

Adhering to these standardized requirements ensures interoperability, reliability, and security for TETRA networks implementing the Include Call supplementary service.

Keywords: Terrestrial Trunked Radio, TETRA, Include Call, SS-IC, group communication, supplementary services, public safety radio, mission-critical communications, ETSI, Slovenian standard.

SLOVENSKI STANDARD
01-december-2003
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Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 11: Supplementary
services stage 2; Sub-part 17: Include Call (IC)
Ta slovenski standard je istoveten z: EN 300 392-11-17 Version 1.1.2
ICS:
33.070.10 Prizemni snopovni radio Terrestrial Trunked Radio
(TETRA) (TETRA)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

European Standard (Telecommunications series)

Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 11: Supplementary services stage 2;
Sub-part 17: Include Call (IC)

2 ETSI EN 300 392-11-17 V1.1.2 (2002-01)

Reference
DEN/TETRA-03A-11-17
Keywords
data, radio, speech, stage 2, supplementary
service, TETRA, V+D
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ETSI
3 ETSI EN 300 392-11-17 V1.1.2 (2002-01)
Contents
Intellectual Property Rights.4
Foreword.4
1 Scope.5
2 References.5
3 Definitions and abbreviations.6
3.1 Definitions.6
3.2 Abbreviations.6
4 Functional model.7
4.1 Functional model description.7
4.2 Description of functional entities .8
4.2.1 Served user functional entity, FE1.8
4.2.2 Served user SwMI functional entity, FE21.8
4.2.3 Group controlling SwMI functional entity, FE22 .8
4.2.4 Other party SwMI functional entity, FE23 .8
4.2.5 Affected user SwMI functional entity, FE25 .8
4.2.6 Other party functional entity, FE3 .8
4.2.7 Affected user functional entity, FE5.9
4.3 Relationship of functional model to basic call functional model .9
5 Information flows.10
5.1 Definition of information flows.10
5.1.1 BASIC CALL FAIL.10
5.1.2 CANCEL.10
5.1.3 INFORM.10
5.1.4 INVOKE.10
5.1.5 NOT SUBSCRIBED.11
5.1.6 NOT SUPPORTED.11
5.2 Relationship of information flows to basic individual call information flows .11
5.3 Service primitives.11
5.4 Examples of information flow sequences.12
5.4.1 Successful invocation and operation.12
5.4.2 Unsuccessful invocation.13
5.4.2.1 SS-IC not subscribed to.13
5.4.2.2 SS-IC failure due to basic call failure .13
5.4.2.3 SS-IC not supported .14
5.4.3 SS-IC cancellation.14
5.5 FE actions.15
5.5.1 Functional Entity actions of FE1 .15
5.5.2 Functional Entity actions of FE21 .15
5.5.3 Functional Entity Actions of FE23 .15
5.5.4 Functional Entity actions of FE25 .16
5.5.5 Functional Entity actions of FE3 .16
5.5.6 Functional Entity actions of FE5 .16
6 Allocation of functional entities to physical equipment.16
7 Interworking considerations.17
History .18

ETSI
4 ETSI EN 300 392-11-17 V1.1.2 (2002-01)
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://webapp.etsi.org/IPR/home.asp).
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 European Standard (Telecommunications series) has been produced by ETSI Project Terrestrial Trunked Radio
(TETRA).
The present document is part 11, sub-part 17 of a multi-part deliverable covering Voice plus Data (V+D), as identified
below:
Part 1: "General network design";
Part 2: "Air Interface (AI)";
Part 3: "Interworking at the Inter-System Interface (ISI)";
Part 4: "Gateways basic operation";
Part 5: "Peripheral Equipment Interface (PEI)";
Part 7: "Security";
Part 9: "General requirements for supplementary services";
Part 10: "Supplementary services stage 1";
Part 11: "Supplementary services stage 2";
Part 12: "Supplementary services stage 3";
Part 13: "SDL model of the Air Interface (AI)";
Part 14: "Protocol Implementation Conformance Statement (PICS) proforma specification";
Part 15: "TETRA frequency bands, duplex spacings and channel numbering";
Part 16: "Network Performance Metrics";
Part 17: "TETRA V+D and DMO Release 1.1 specifications".

National transposition dates
Date of adoption of this EN: 11 January 2002
Date of latest announcement of this EN (doa): 30 April 2002
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 October 2002
Date of withdrawal of any conflicting National Standard (dow): 31 October 2002

ETSI
5 ETSI EN 300 392-11-17 V1.1.2 (2002-01)
1 Scope
The present document specifies the stage 2 description of the Supplementary Service Include Call (SS-IC) for the
Terrestrial Trunked Radio (TETRA).
SS-IC enables a served user, while already participating in an active call (original call) to include new participant(s)
into a group call together with the participant(s) in the original call.
Man-Machine Interface (MMI) and charging principles are outside of the scope of the present document.
Supplementary service specifications are produced in three stages according to the method defined in
ITU-T Recommendation I.130 [1]. The stage 2 description identifies the functional capabilities and the information
flows needed to support the supplementary service as specified in its stage 1 description (see ETS 300 392-10-17 [7]).
The stage 2 description is followed by the stage 3 description, which specifies the protocols at the air interface and at
the various Inter-System Interfaces (ISI) to support the service.
The present document is applicable to TETRA Voice plus Data terminal equipment and networks.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
[1] ITU-T Recommendation I.130 (1988): "Method for the characterization of telecommunication
services supported by an ISDN and network capabilities of an ISDN".
[2] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air
Interface (AI)".
[3] ETSI EN 300 392-3-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 2: Additional Network Feature
Individual Call (ANF-ISIIC)".
[4] ETSI ETS 300 392-3-3: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 3: Additional Network Feature
Group Call (ANF-ISIGC)".
[5] ETSI ETS 300 392-3-5: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 5: Additional Network Feature
for Mobility Management (ANF-ISIMM)".
[6] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 9: General requirements for supplementary services".
[7] ETSI ETS 300 392-10-17: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 10: Supplementary services stage 1; Sub-part 17: Include call".
[8] ETSI EN 300 392-12-17: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 12: Supplementary services stage 3; Sub-part 17: Include Call (IC)".
[9] ISO/IEC 11574: "Information technology - Telecommunications and information exchange
between systems - Private Integrated Services Network - Circuit-mode 64 kbit/s bearer services -
Service description, functional capabilities and information flows".
ETSI
6 ETSI EN 300 392-11-17 V1.1.2 (2002-01)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
affected user: user or users included in the original call
NOTE: The original call may be either a group call or an individual call but the resulting call is a group call.
affected user SwMI: any SwMI where an affected user is currently registered
another user: any other than server user in the original call to which new users will be included
another user SwMI: any SwMI where another user is currently registered
original call: the call already established in which the served user participates and which will be included in a group
call together with new participant added by the served user
In addition, the terms and definitions of EN 300 392-9 [6] apply with the following modifications:
served user: user already participating in a call and who invokes the SS-IC supplementary service
served user SwMI: SwMI where the served user is currently registered
NOTE: The served user SwMI will be the group controlling SwMI of the resulting group call.
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ANF-ISIMM Additional Network Feature - Inter-System Interface Mobility Management
ANF-ISIGC Additional Network Feature - Inter-System Interface Group Call
ANF-ISIIC Additional Network Feature - Inter-System Interface Individual Call
CC Basic Service Call Control functional entity
CCA Basic Service Call Control functional entity agent
NOTE: CC and CCA are applied as defined in ISO/IEC 11574 [9].
IC Include Call
FE Functional Entity
ISI Inter-System Interface
LS Line Station
MS Mobile Station
SDL Specification and Description Language
SS Supplementary Service
NOTE: The abbreviation SS is only used when referring to a specific supplementary service (e.g. SS-IC).
SwMI Switching and Management Infrastructure
ETSI
7 ETSI EN 300 392-11-17 V1.1.2 (2002-01)
4 Functional model
4.1 Functional model description
The functional model shall comprise the following Functional Entities (FEs):
FE1 Served user functional entity;
FE2 Generic combination of FE21, FE22, FE23 and FE25;
FE21 Served user SwMI individual call FE;
FE22 Group controlling SwMI FE;
FE23 Another party SwMI in the original call;
FE25 Affected user SwMI FE;
FE3 Another party in the original call;
FE5 Affected user FE (included user).
The following relationships shall exist:
ra between FE1 and FE21/FE22;
rb between FE23/FE25 and FE3;
rc between FE25/FE23 and FE5/FE3;
rd between FE21/FE22 and FE23/FE25;
re between FE21/FE25 and FE25/FE23.
Figure 1 shows these FEs and relationships. Figure 2 shows simplified FE model and relationships.
rb
FE5/
FE3 FE23
FE3
rc
rd
re
ra
FE21/ FE25/
FE1
FE23
FE22
NOTE: Functional entity FE2 is a combination of FE21, FE22 and FE25

Figure 1: Functional model for the basic operational part of SS-IC
ETSI
8 ETSI EN 300 392-11-17 V1.1.2 (2002-01)
ra      rb
FE1 FE2 FE3
user A SS-IC FE user B
rc
FE5
user C
Figure 2: Functional model for the basic operation in a single SwMI
4.2 Description of functional entities
4.2.1 Served user functional entity, FE1
FE1 is the functional entity which serves the served user for the invocation of SS-IC.
4.2.2 Served user SwMI functional entity, FE21
When it receives a SS-IC invocation from FE1, FE21 checks whether SS-IC has been subscribed and, if yes, sets a
second call to the included party FE5 and requests FE22 to include the original call and the second call (into a group
call).
4.2.3 Group controlling SwMI functional entity, FE22
When informed by FE21 that SS-IC has been invoked FE22 includes all participants in the original call and the second
call into a single group call.
4.2.4 Other party SwMI functional entity, FE23
FE23 receives from FE22 the information that SS-IC has been operated for the call and passes it to the other party FE3
entity and modifies the call into a group call, when necessary.
4.2.5 Affected user SwMI functional entity, FE25
FE25 may receive from FE21 information that SS-IC has been invoked (by the served user) for an individual user
inclusion for FE5 availability checking.
...