ETSI TS 100 392-3-9 V1.1.1 (2018-05)

ETSI TS 100 392-3-9 V1.1.1 (2018-05)






TECHNICAL SPECIFICATION
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI);
Sub-part 9: Transport layer independent, General design

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2 ETSI TS 100 392-3-9 V1.1.1 (2018-05)



Reference
DTS/TCCE-03237
Keywords
management, mobility, TETRA
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3 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 ISI standardization methodology . 11
4.1 3 stage methodology . 11
4.2 Stage Descriptions . 11
4.2.1 Stage 1 description . 11
4.2.2 Stage 2 description . 12
4.2.3 Stage 3 description . 12
4.3 Usage of Specification and Description Language (SDL) . 13
5 TETRA SwMI roles using ISI . 13
5.1 Management configurations . 13
5.1.1 Migration and group attachment configurations . 13
5.1.1.1 SwMI roles for migration and group attachment . 13
5.1.1.2 SwMI databases . 13
5.1.1.3 Migration scenarios . 14
5.1.1.4 Group attachment scenarios . 15
5.1.2 Group linking configurations . 16
5.2 Call processing . 17
5.2.1 Group call processing . 17
5.2.2 Individual call processing . 19
5.2.3 Transit . 20
6 Introduction to ISI ANFs . 20
6.1 ISI ANF Overview . 20
6.2 ANF-ISIMM. 21
6.3 ANF-ISIIC . 21
6.4 ANF-ISIGC . 21
6.5 ANF-ISISDS . 21
6.6 ANF-ISISS . 21
7 ISI Generic Functional Protocol (ISI GFP) . 21
7.1 Protocol model . 21
7.2 Services provided by the conceptual protocol model entities . 22
7.3 Addressing and transport . 23
7.4 ISI GFP requirements and operation definition . 23
7.4.1 General . 23
7.4.2 Result . 26
7.4.3 ReturnError . 26
7.4.4 Reject . 27
7.4.5 Procedures. 27
8 Security related functions the ISI . 29
8.1 Security overview . 29
8.2 ITSI authentication . 29
8.3 End-to-end encryption . 29
8.4 End-to-end key management via ISI . 30
ETSI

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4 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
Annex A (normative): Security - supporting encryption over ISI . 31
A.1 Overview . 31
A.2 Encryption . 32
A.2.1 ISI relation to air interface and end-to-end encryption . 32
A.2.2 Air interface encryption key management via ISI . 32
A.2.2.1 OTAR . 32
A.2.2.2 Secret Key of individual subscriber (K) . 33
A.2.2.3 Derived Cipher Key (DCK) . 33
A.2.2.4 Common Cipher Key (CCK) . 33
A.2.2.5 Static Cipher Key (SCK) . 33
A.2.2.6 Group Cipher Key (GCK) . 33
Annex B (informative): Encoding Example . 34
Annex C (informative): Change requests . 36
History . 37

ETSI

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5 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables 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 (https://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.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee TETRA and Critical
Communications Evolution (TCCE).
The present document is part 3, sub-part 9 of a multi-part deliverable covering the Terrestrial Trunked Radio (TETRA);
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)":
Sub-part 1: "General design";
Sub-part 2: "Additional Network Feature Individual Call (ANF-ISIIC)";
Sub-part 3: "Additional Network Feature Group Call (ANF-ISIGC)";
Sub-part 4: "Additional Network Feature Short Data Service (ANF-ISISDS)";
Sub-part 5: "Additional Network Feature for Mobility Management (ANF-ISIMM)";
Sub-part 6: "Speech format implementation for circuit mode transmission";
Sub-part 7: "Speech Format Implementation for Packet Mode Transmission";
Sub-part 8: "Generic Speech Format Implementation";
Sub-part 9: "Transport layer independent, General design";
Sub-part 10: "General design, PSS1 over E.1";
Sub-part 11: "General design, SIP/IP";
Sub-part 12: "Transport layer independent Additional Network Feature Individual Call (ANF-ISIIC)";
Sub-part 13: "Transport layer independent Additional Network Feature Group Call (ANF-ISIGC)";
Sub-part 14: "Transport layer independent Additional Network Feature Short Data Service (ANF-ISISDS)";
ETSI

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6 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
Sub-part 15: Transport layer independent Additional Network Feature, Mobility Management
(ANF-ISIMM)";
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 specifications";
Part 18: "Air interface optimized applications".
NOTE 1: Part 3, sub-parts 6 and 7 (Speech format implementation), part 4, sub-part 3 (Data networks gateway),
part 10, sub-part 15 (Transfer of control), part 13 (SDL) and part 14 (PICS) of this multi-part deliverable
are in status "historical" and are not maintained.
NOTE 2: Some parts are also published as Technical Specifications such as ETSI TS 100 392-2 and those may be
the latest version of the document.
The present document is based on ETSI EN 300 392-3-1 "Interworking at the Inter-System Interface (ISI); General
Design" [i.6]. The main differences are:
• Any transport protocol (PSS1) information is removed as several different transport protocols can be used.
• Any reference to ROSE ([i.4] and [i.5]) is removed and the necessary description of the PDU identification has
been added.
• The ASN.1 specification of the PDUs has been re-designed taking into account that the reference to ROSE is
removed.
For all subparts in the TETRA specification ETSI EN 300 392-3 "Interworking at the Inter-System Interface (ISI)" [3],
[4], [5], [6], [7], [8] and [9] the terms ISI and TETRA ISI are equivalent.
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 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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7 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
1 Scope
The present document defines the general aspects of interworking at the Inter-System Interface (ISI) for Terrestrial
Trunked Radio (TETRA) system supporting Voice plus Data (V+D). Those specify the general concepts which are the
basis of the ISI operation between TETRA systems. It introduces the Additional Network Features (ANFs) used at
the ISI, and specifies:
• the general protocol mechanism upon which the definition of each ANF is based; and
• the security related functions over the ISI.
The specification of the general transport layer independent protocol mechanism applies to any TETRA Switching and
Management Infrastructure (SwMI) which supports the ISI. The security requirements for the ISI only apply to SwMIs
which support authentication or end-to-end encryption over the ISI.
Besides the ISI general design, the present sub-part, interworking at the Inter-System Interface comprises the following
other sub-parts:
• General design, PSS1 over E.1 [3];
• General design, SIP/IP [4];
• Transport layer independent Additional Network Feature Individual Call (ANF-ISIIC) [5];
• Transport layer independent Additional Network Feature Group Call (ANF-ISIGC) [6];
• Transport layer independent Additional Network Feature Short Data Service (ANF-ISISDS) [7];
• Transport layer independent Additional Network Feature, Mobility Management (ANF-ISIMM) [8]; and
• Generic Speech Format Implementation [9].
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 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
https://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.
The following referenced documents are necessary for the application of the present document.
[1] ETSI EN 300 392-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 1:
General network design".
[2] ETSI EN 300 392-2: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 2: Air
Interface (AI)".
[3] ETSI TS 100 392-3-10: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI); Sub-part 10: General design, PSS1 over E.1".
[4] ETSI TS 100 392-3-11: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI); Sub-part 11: General design, SIP/IP".
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8 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
[5] ETSI TS 100 392-3-12: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI); Sub-part 12: Transport Layer Independent
Additional Network Feature Individual Call (ANF-ISIIC)".
[6] ETSI TS 100 392-3-13: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D) Part 3:
Interworking at the Inter-System Interface (ISI) Sub-part 13: Transport layer independent
Additional Network Feature Group Call (ANF-ISIGC)".
[7] ETSI TS 100 392-3-14: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI); Sub-part 14: Transport Layer Independent
Additional Network Feature Short Data Service (ANF-ISISDS)".
[8] ETSI TS 100 392-3-15: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI); Sub-part 15: Transport layer independent
Additional Network Feature, Mobility Management (ANF-ISIMM)".
[9] ETSI TS 100 392-3-8: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI); Sub-part 8: Generic Speech Format
Implementation".
[10] ETSI EN 302 109: "Terrestrial Trunked Radio (TETRA); Security; Synchronization mechanism
for end-to-end encryption".
[11] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 9:
General requirements for supplementary services".
[12] Recommendation ITU-T X.690: "Information technology - ASN.1 encoding rules: Specification of
Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding
Rules (DER)".
[13] ETSI EN 300 392-7: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 7:
Security".
2.2 Informative 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.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long 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] ETSI EN 300 395-1: "Terrestrial Trunked Radio (TETRA); Speech CODEC for full-rate traffic
channel; Part 1: General description of speech functions".
[i.2] Recommendation ITU-T I.130: "Method for the characterization of telecommunication services
supported by an ISDN and network capabilities of an ISDN".
[i.3] Recommendation ITU-T Z.100: "Specification and description language (SDL)".
[i.4] Recommendation ITU-T X.219: "Remote Operations: Model, notation and service definition".
[i.5] Recommendation ITU-T X.229: "Remote Operations: Protocol specification".
[i.6] ETSI EN 300 392-3-1: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3:
Interworking at the Inter-System Interface (ISI); Sub-part 1: General design".
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9 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
call independent: property of information which is conveyed between SwMI on a signalling connection which is not
related to an audio call
call independent signalling connection: signalling connection established between ANF-ISI entities located in
different Switching and Management Infrastructures that is not related to audio calls
destination SwMI: Switching and Management Infrastructure where the receiving ANF-ISI entity is located (in the
context of a single one-way exchange of information between two ANF-ISI entities located in different Switching and
Management Infrastructures)
Group TETRA Subscriber Identity (GTSI): TETRA Subscriber Identity assigned to a group
home SwMI: home of the MS's ITSI, i.e. the SwMI where the network code (MNC) is equal to that of the individual
subscriber (ITSI)
invocation: action taken by the user or by the service provider to execute a specific service function within real time
ISI mediation function: entity which provides to different ANF-ISI entities the services that are not supported by the
transport layer protocol
Location Area (LA): area within radio coverage of a base station or group of base stations within which a Mobile
Station (MS) is allowed to operate
Mobile Network Identity (MNI): identity that identify the SwMI
NOTE: It consists of the Mobile Country Code (MCC) and the Mobile Network Code (MNC).
Mobile Station (MS): physical grouping that contains all of the mobile equipment that is used to obtain TETRA
services
NOTE: By definition, a mobile station contains at least one Mobile Radio Stack (MRS).
originating SwMI: in the context of a TETRA call, Switching and Management Infrastructure where the calling user is
registered (which implies that this user is located in that SwMI) or Switching and Management Infrastructure which
originates a Call independent signalling connection
segmentation: act of generating two or more transport layer PDUs derived from one initial ISI PSU
service user: abstract representation of the totality of those entities in a single system that makes use of a service
through a single access point
Short Subscriber Identity (SSI): network specific portion of a TSI
NOTE: A SSI is only unique within one TETRA sub-domain (one TETRA network).
source SwMI: Switching and Management Infrastructure where the sending ANF-ISI entity is located (in the context of
a single one-way exchange of information between two ANF-ISI entities located in different Switching and
Management Infrastructures)
subscriber: user of a telecommunication service, based on a contract with the provider of the service
NOTE 1: The subscriber may be an individual or a group: in the first case it is identified by an ITSI, in the second,
by a GTSI.
NOTE 2: The individual subscriber is able to access an SwMI either through a MS or Line Station.
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10 ETSI TS 100 392-3-9 V1.1.1 (2018-05)
supplementary service: service which modifies or supplements a basic bearer service or a basic teleservice
NOTE: A supplementary service cannot be offered to a customer as a stand-alone service. It should be offered in
combination with a bearer service or a teleservice.
Switching and Management Infrastructure (SwMI): all of the TETRA equipment for a Voice plus Data (V+D)
network
terminating SwMI: in the context of a TETRA call, Switching and Management Infrastructure where the called user is
registered (which implies that this user is located in that SwMI) or Switching and Management Infrastructure which
terminates a Call independent signalling connection
TETRA Subscriber Identity (TSI): global TETRA network address that is to identify an individual or a group
subscriber within the domain of all TETRA networks
user: entity using the services of a telecommunications network via an externally accessible service access point
NOTE: An individual user may be a person or an application process.
visited SwMI: TETRA network which MNI is not equal to the user's MNI
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
(V)ASSI Visiting Alias Short Subscriber Identity
(V)GSSI Visiting Group Short Subscriber Identity
AC Authentication Centre
AI Air Interface
ANF Additional Network Feature
ANF-ISI all Additional Network Features of the Inter-System Interface
APDU Application Protocol Data Unit
ASN.1 Abstract Syntax Notation One
ASSI Alias Short Subscriber Identity
BER Basic Encoding Rules
BS Base Station
C Conditional
CAD Call Authorized by Dispatcher
CCK Common Cipher Key
C-LDB Controlling Linking DataBase
CLIR Calling Line Identification Restriction
DCK Derived Cipher Key
DMO Direct Mode Operation
GCK Group Cipher Key
GFP Generic Functional Protocol
G-HDB Group Home DataBase
GSSI Group Short Subscriber Identity
GTSI Group TETRA Subscriber Identity
G-VDB Group Visited DataBase
HAC Home Authentication Centre
HDB Home DataBase
I-HDB Individual Home DataBase
IP Internet Protocol
ISI Inter-System Interface
ISIGC Inter-System Interface Group Call
ISIIC Inter-System Interface Individual Call
ISIMM Inter-System Interface Mobility Management
ISISDS Inter-System Interface Short Data Service
ISISS Inter-System Interface Supplementary Services
ITSI Individual TETRA Subscriber Identity
ITU-T Inte
...