ETSI EN 300 392-3-1 V1.4.1 (2015-12)

Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)

EUROPEAN STANDARD
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI);
Sub-part 1: General design
2 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)

Reference
REN/TCCE-03236
Keywords
interworking, radio, TETRA, V+D
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3 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
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
4.1.0 General . 11
4.1.1 Stage 1 description . 11
4.1.2 Stage 2 description . 12
4.1.3 Stage 3 description . 12
4.2 Usage of Specification and Description Language (SDL) . 12
5 Usage of Private Signalling System 1 (PSS1) for TETRA . 13
5.1 PSS1 functionality . 13
5.2 Protocol stack for signalling information . 13
5.3 Generic Functional Protocol (GFP) . 14
5.4 Protocol stack for user information . 15
6 TETRA SwMI roles using ISI . 15
6.1 Management configurations . 15
6.1.1 Migration and group attachment configurations . 15
6.1.1.1 SwMI roles for migration and group attachment . 15
6.1.1.2 SwMI databases . 16
6.1.1.3 Migration scenarios . 17
6.1.1.4 Group attachment scenarios . 18
6.1.2 Group linking configurations . 19
6.2 Call configurations . 20
6.2.0 General . 20
6.2.1 Group call configuration . 20
6.2.2 Individual call configuration . 22
6.2.3 Transit . 23
6.3 User information encoding at the ISI . 23
7 Introduction to ISI ANFs . 23
7.0 General . 23
7.1 ANF-ISIMM. 24
7.2 ANF-ISIIC . 24
7.3 ANF-ISIGC . 24
7.4 ANF-ISISDS . 24
7.5 ANF-ISISS . 24
8 ISI Generic Functional Protocol (ISI GFP) . 24
8.1 Protocol model . 24
8.2 Services provided by the protocol model entities . 25
8.3 Addressing and transport . 26
8.3.1 Addressing . 26
8.3.2 Transport of ROSE APDUs . 27
8.3.2.0 General . 27
8.3.2.1 Call related ROSE APDUs . 27
8.3.2.2 Call unrelated ROSE APDUs . 27
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4 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
8.3.2.2.0 General . 27
8.3.2.2.1 Protocol for the establishment of a call independent signalling connection . 27
8.3.2.2.2 Use of a call independent signalling connection already established . 28
8.3.2.2.3 Clearing of a call independent signalling connection . 28
8.4 Remote Operations Service Entity (ROSE) requirements and operation definition . 29
8.4.1 General . 29
8.4.2 Return-result . 32
8.4.3 Return-error . 33
8.4.4 Reject . 34
8.5 Segmentation Service Element (SSE) . 34
8.5.0 Overview . 34
8.5.1 Procedures. 34
8.5.1.0 General . 34
8.5.1.1 Requirements for the segmentation procedure . 34
8.5.1.2 Requirements for the re-assembly procedure . 35
8.5.2 Segment encoding . 35
8.6 Co-ordination Function . 37
9 Security over the ISI . 37
9.0 General . 37
9.1 ITSI authentication . 37
9.2 End-to-end encryption . 38
9.3 End-to-end key management via ISI . 38
Annex A (normative): Security - supporting encryption over ISI . 39
A.1 Overview . 39
A.2 Encryption . 40
A.2.1 ISI relation to air interface and end-to-end encryption . 40
A.2.2 Air interface encryption key management via ISI . 40
A.2.2.0 General . 40
A.2.2.1 Secret Key of individual subscriber (K) . 40
A.2.2.2 Derived Cipher Key (DCK) . 41
A.2.2.3 Common Cipher Key (CCK) . 41
A.2.2.4 Static Cipher Key (SCK) . 41
A.2.2.5 Group Cipher Key (GCK) . 41
Annex B (informative): Maximum length of a ROSE APDU or a SSE segment encoded in a
facility information element . 42
B.0 General . 42
B.1 PSS1 FACILITY message. 42
B.2 PSS1 basic call message . 43
B.3 Example of the encoding of an ANF-ISIMM MIGRATION PDU in a ROSE Invoke ROSE
APDU in a call PISN FACILITY PDU . . 44
Annex C (informative): Change requests . 46
History . 47

ETSI
5 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
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 draft European Standard (EN) has been produced by ETSI Technical Committee TETRA and Critical
Communications Evolution (TCCE), and is now submitted for the combined Public Enquiry and Vote phase of the
ETSI standards EN Approval Procedure.
The present document is part 3, sub-part 1 of a multi-part deliverable covering the Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D), Release 2 as identified below:
ETSI EN 300 392-1: "General network design";
ETSI EN 300 392-2: "Air Interface (AI)";
ETSI EN 300 392-3: "Interworking at the Inter-System Interface (ISI)";
ETSI EN 300 392-3-1: "General design";
ETSI EN 300 392-3-2: "Additional Network Feature Individual Call (ANF-ISIIC)";
ETSI EN 300 392-3-3: "Additional Network Feature Group Call (ANF-ISIGC)";
ETSI EN 300 392-3-4: "Additional Network Feature Short Data Service (ANF-ISISDS)";
ETSI EN 300 392-3-5: "Additional Network Feature for Mobility Management (ANF-ISIMM)";
ETSI TS 100 392-3-6: "Speech format implementation for circuit mode transmission";
ETSI TS 100 392-3-7: "Speech Format Implementation for Packet Mode Transmission";
ETSI TS 100 392-3-8: "Generic Speech Format Implementation";
ETSI ETS 300 392-4: "Gateways basic operation";
ETSI EN 300 392-5: "Peripheral Equipment Interface (PEI)";
ETSI EN 300 392-7: "Security";
ETSI EN 300 392-9: "General requirements for supplementary services";
ETSI EN 300 392-10: "Supplementary services stage 1";
ETSI EN 300 392-11: "Supplementary services stage 2";
ETSI EN 300 392-12: "Supplementary services stage 3";
ETSI ETS 300 392-13: "SDL model of the Air Interface (AI)";
ETSI ETS 300 392-14: "Protocol Implementation Conformance Statement (PICS) proforma specification";
ETSI TS 100 392-15: "TETRA frequency bands, duplex spacings and channel numbering";
ETSI TS 100 392-16: "Network Performance Metrics";
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6 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
ETSI TR 100 392-17: "TETRA V+D and DMO specifications";
ETSI TS 100 392-18: "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 TS 100 392-2 and those may be the
latest version of the document.

Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 6 months after doa

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
7 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
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, called ISI Generic Functional Protocol (ISI GFP), upon which the definition
of each ANF is based; and
- the security requirements for the ISI.
The ISI GFP specification 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 encryption over the ISI.
Besides the ISI general design, the present document, interworking at the Inter-System Interface comprises the
following other sub-parts:
- Additional Network Feature - ISI Individual Call (ANF-ISIIC);
- Additional Network Feature - ISI Group Call (ANF-ISIGC);
- Additional Network Feature - ISI Short Data service (ANF-ISISDS); and
- Additional Network Feature - ISI Mobility Management (ANF-ISIMM).
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
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.
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 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 EN 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 EN 300 392-3-4: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 4: Additional Network Feature
Short Data Service (ANF-ISISDS)".
[6] ETSI EN 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)".
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8 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
[7] 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".
[8] ETSI EN 300 392-7: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 7: Security".
[9] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D);
Part 9: General requirements for supplementary services".
[10] ETSI ETS 300 402-1: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Data link layer; Part 1: General aspects [ITU-T
Recommendation Q.920 (1993), modified]".
[11] ETSI ETS 300 402-2: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling
System No. one (DSS1) protocol; Data link layer; Part 2: General protocol specification [ITU-T
Recommendation Q.921 (1993), modified]".
[12] ISO/IEC 11572: "Information technology -- Telecommunications and information exchange
between systems -- Private Integrated Services Network -- Circuit mode bearer services -- Inter-
exchange signalling procedures and protocol".
[13] ISO/IEC 11582: "Information technology -- Telecommunications and information exchange
between systems -- Private Integrated Services Network -- Generic functional protocol for the
support of supplementary services -- Inter-exchange signalling procedures and protocol".
[14] Recommendation ITU-T G.704: "Synchronous frame structures used at 1544, 6312, 2048, 8448
and 44 736 kbit/s hierarchical levels".
[15] Recommendation ITU-T Q.931: "ISDN user-network interface layer 3 specification for basic call
control".
[16] 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)".
[17] Recommendation ITU-T X.219: "Remote Operations: Model, notation and service definition".
[18] Recommendation ITU-T X.882: "Information technology - Remote Operations: OSI realizations -
Remote Operations Service Element (ROSE) protocol specificationRemote Operations: Protocol
specification".
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
reference 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 E.164: "The international public telecommunication numbering plan".
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9 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the terms and definitions given in ISO/IEC 11582 [13] and the following
apply:
call independent: property of information which is conveyed across the Q reference point in a message that does not
use a call reference which has an associated user-information connection
NOTE: In TETRA standards, the term call unrelated is used with the same meaning as call independent.
call independent signalling connection: signalling connection established between ANF-ISI entities located in
different Switching and Management Infrastructures that does not have an associated user-information connection
call unrelated: See the definition of the term "call independent".
co-ordination Function: entity which provides co-ordination between different ANF-ISI entities, ROSE, SSE and
GFT Control for different TETRA basic and supplementary services
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)
Generic Functional Transport Control (GFT Control) entity: entity that exists within a Switching and Management
Infrastructure and provides a range of services to the ANF-ISI entities and ROSE via the co-ordination Function
NOTE: The services are defined in clause 6 of ISO/IEC 11582 [13].
group attached SwMI: Switching and Management Infrastructure different from the home SwMI of the group
considered in which at least one individual subscriber member of the group is attached to that group
Group TETRA Subscriber Identity (GTSI): TETRA Subscriber Identity assigned to a group
home SwMI: Switching and Management Infrastructure in which the subscription of a given user is registered
NOTE: That user is defined as being a subscriber (see below the definition of that term).
invocation: action taken by the user or by the service provider to execute a specific service function within real time
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 is broadcast by all TETRA base stations to uniquely 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 PDUs derived from an initial one
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).
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10 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
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.
supplementary service: 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
NOTE: The SwMI enables users to communicate with each other.
terminating 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
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: Switching and Management Infrastructure different from the home SwMI in which a given subscriber is
currently registered
NOTE: The definition of this term implies that the given subscriber is mobile and has moved away from his home
SwMI (to register in this visited SwMI). Therefore, it cannot apply to a group.
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
ANF Additional Network Feature
ANF-ISI Additional Network Features of the Inter-System Interface
APDU Application Protocol Data Unit
ASN.1 Abstract Syntax Notation One
BER Basic Encoding Rules
BS Base Station
C Conditional
CAD Call Authorized by Dispatcher
CCK Common Cipher Key
CF Call Forwarding
C-LDB Controlling Linking DataBase
DCK Derived Cipher Key
E.1 E-carrier signal level 1, 2 048 kbit/s
ECMA European Computer Manufacturers Association
GCK Group Cipher Key
GFP Generic Functional Protocol
GFT Generic Functional Transport
G-HDB Group Home DataBase
GTSI Group TETRA Subscriber Identity
G-VDB Group Visited DataBase
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11 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
HAC Home Authentication Centre
HDB Home DataBase
HDLC High-level Data Link Control
I-HDB Individual Home DataBase
ISI Inter-System Interface
ISSI Individual Short Subscriber Identity
ITSI Individual TETRA Subscriber Identity
I-VDB Individual Visited DataBase
K authentication Key
KS Session Key
LA Location Area
LAPD Link Access Procedure for the D-Channel
LS Line Station
M Mandatory
MCC Mobile Country Code
MM Mobility Management
MNC Mobile Network Code
MNI Mobile Network Identity
MRS Mobile Radio Stack
MS Mobile Station
MSISDN Mobile Station ISDN number
NFE Network Facility Extension
O Optional
OTAR Over The Air Re-keying
PC Protocol Control
PDU Protocol Data Unit
PINX Private Integrated Network eXchange
PISN Private Integrated Services Network
PN Party Number
PSS1 Private Signalling System 1
PSTN Public Switched Telephone Network
QSIG Q interface SIGnalling protocol
ROSE Remote Operation Service Element
RS Random Seed
SCK Static Cipher Key
SDL Specification and Description Language
SDS Short Data Service
SS Supplementary Services
SSE Segmentation Service Element
SSI Short Subscriber Identity
SwMI TETRA Switching and Management Infrastructure
TSI TETRA Subscriber Identity
V+D Voice plus Data
VAC Visitor Authentication Centre
VDB Visitor DataBase
4 ISI standardization methodology
4.1 3 stage methodology
4.1.0 General
The ISI Additional Network Features (ANFs), listed in clause 7, are standardized using the modelling method defined in
Recommendation ITU-T I.130 [i.2].
4.1.1 Stage 1 description
Stage 1 description defines the services which the standardized ANF entity provides to the concerned service users, e.g.
SwMI entities in the case of TETRA. The services are visible at the Service Access Points (SAPs). The stage 1
description is intended to allow an understanding of the services independently from the implementation.
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12 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
For normal point-to-point services the service model is shown in figure 1.
Service Service
user user
SwMI-1
SwMI-2
SAP
SAP
ANF Entity
Figure 1: Service model for point-to-point services
For point-to-multipoint services the service model is shown in figure 2.
Service
Service
user
user
SwMI-1 SwMI-2
SAP SAP
ANF Entity
SAP
SwMI-3
Service
user
Figure 2: Service model for point-to-multipoint services
4.1.2 Stage 2 description
Stage 2 description identifies the functional capabilities and the information flows needed to support the service as
described in stage 1.
4.1.3 Stage 3 description
Stage 3 description gives a precise specification of the signalling protocols for the ANF services, i.e. the encoding rules
for the information flows and the corresponding procedures.
4.2 Usage of Specification and Description Language (SDL)
SDL defined in Recommendation ITU-T Z.100 [i.3] is used to identify and represent the behaviour of the concerned
ANF in providing services.
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13 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
5 Usage of Private Signalling System 1 (PSS1) for
TETRA
5.1 PSS1 functionality
The TETRA ISI application is built on top of the PSS1 protocol stack for interconnecting Private Integrated services
Network eXchanges (PINXs) to form Private Integrated Services Network (PISN). PSS1 is the ISO term; the PSS1
protocol is also known, informally, as QSIG, generic term created by the European Computer Manufacturers
Association (ECMA) which developed most of the signalling protocols comprised in the PSS1 protocol.
TETRA uses the standard functionalities defined for PSS1:
- signalling for the support of circuit-mode basic services (see note);
- Generic Functional Protocol (GFP) originally defined for the support of supplementary services.
NOTE: The definition of PSS1 basic call in ISO/IEC 11572 [12] is as follows:
"The basic call is a single invocation of a basic service. Signalling procedures are used for establishing,
maintaining and clearing a circuit-mode call at an interface between two PINXs. These signalling
procedures are defined in terms of messages exchanged over a signalling carriage mechanism connection
within the signalling channel of the Inter-PINX link. The result of successful basic call establishment is a
connection for the purpose of user information transfer".
5.2 Protocol stack for signalling information
Figure 3 shows how the protocols for TETRA ANF which apply at the ISI are built on top of the PSS1 protocol stack.
The Remote Operation Service Element (ROSE) is used to convey ANF-ISI Protocol Data Units (PDU).
For the TETRA ANF-ISIIC and ANF-ISIGC protocols, figure 3 has to be supplemented with a direct interface to PSS1
protocol control for basic call. In addition, basic call correlation shall be ensured for the delivery of the
corresponding PDUs by ANF-ISIIC and ANF-ISIGC through the protocol stack shown on figure 3, e.g. the ANF-ISIIC
SETUP PDU shall have to be sent in the PSS1 SETUP message for establishing the PISN call to be used by the invoked
ANF-ISIIC.
NOTE 1: The PSS1 basic call protocol is defined in ISO/IEC 11572 [12].
NOTE 2: The term "basic call correlation" has been used in the preceding clause as implicitly defined in notes to
tables 3, 5, 7, and 9 of ISO/IEC 11582 [13].
Basic call correlation shall also be ensured for the delivery of specific supplementary service PDUs through
ANF-ISISS, depending of the definition of those supplementary services.
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14 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
SwMI-1 SwMI-2
TETRA ANF
TETRA ANF
Specific TETRA operation
Specific TETRA operation
ITU-T Rec. X.229 ITU-T Rec. X.229
ISO/IEC 11582 ISO/IEC 11582
ISO/IEC 11572 ISO/IEC 11572
ETS 300 402-1 and 2 ETS 300 402-1 and 2
(see note) (see note)
Layer 1 Layer 1
NOTE: Layer 2 protocol depends on the type of the inter-connection.

Figure 3: PSS1 protocol stack for TETRA
NOTE 3: Formally the protocol stack shown in figure 3 applies only for TETRA PDUs sent together with PSS1
basic call messages (e.g. PSS1 SETUP or CONNECT messages): i.e. the ISO/IEC 11572 [12] protocol is
not part of the protocol stack for TETRA PDUs sent in PSS1 FACILITY messages - although
ISO/IEC 11572 [12] is always called for, if only to establish the underlying signalling carriage
mechanism - see clause 9 of ISO/IEC 11572 [12]. However, since the scope of the present document is
not to define the PSS1 protocol model, it has not been judged useful to draw another figure applicable to
the case of TETRA PDUs sent in PSS1 FACILITY messages, where the ISO/IEC 11572 [12] protocol
would not appear.
The protocol stack shown in figure 3 is for signalling information exchange on the common signalling channel i.e.
D-channel. LAPD framing as defined in ETSI ETS 300 402-1 [10] and ETSI ETS 300 402-2 [11] and for E.1, refer to
Recommendation ITU-T G.704 [14], common signalling channel 16 shall be used. Protocol stack for user information
exchange is presented in clause 5.4.
5.3 Generic Functional Protocol (GFP)
The GFP as defined in ISO/IEC 11582 [13] shall be used for all TETRA ANFs of the ISI (ANF-ISI).
ROSE operations shall be used to convey ANF-ISI information in facility information elements, as described in
clause 8. These facility information elements shall be included in PSS1 messages in accordance with
ISO/IEC 11582 [13]. The specification given in clause 7.1.1.1 of ISO/IEC 11582 [13] as to when an SwMI can send a
PSS1 FACILITY message at the earliest shall be understood as follows:
- such message can be sent by a receiving SwMI after it has sent a PSS1 CALL PROCEEDING message
(following reception of a PSS1 SETUP message);
- such message can be sent by a source SwMI after it has received one of the following PSS1 messages:
FACILITY, PROGRESS, ALERTING, CONNECT.
When the call independent signalling connection is used, it shall be connection oriented.
NOTE: This is in line with the choice made for the definition of all existing supplementary services of the PSS1
protocols.
ETSI
15 Draft ETSI EN 300 392-3-1 V1.4.1 (2015-09)
5.4 Protocol stack for user information
Call control manages transportation of user information e.g. TETRA coded speech on B channels as presented in
Q
figure 3a. In this protocol stack the E.1 channels are 64 kbit/s channels supporting unrestricted digital information, refer
to Recommendation ITU-T G.704 [14].
TETRA Call control Call control TETRA
coded user signalling signalling coded user
information information
HDCL LAPD LAPD HDCL
framing framing framing framing
E.1 E.1 Common E.1
channel 16 channel channel 16 E.1 channel
channel
selection (Q-SIG) signalling (Q-SIG) selection
E.1 User information E.1 channel
channel 1 1
etc. etc. etc.
E.1 User information E.1 channel
channel 31 31
Figure 3a: User information protocol stack
For speech transmission the TETRA coded user information is speech frames that shall be carried in an E.1 channel
using HDLC frames, refer to ETSI TS 100 392-3-8 [7], annex B. The call control negotiates the E.1 channel for each
call instance and locally select the negotiated E.1 channel. The mapping between TETRA ISI channels and E.1
B-channels is defined in ETSI TS 100 392-3-8 [7], annex A. Call control signalling (ETSI EN 300 392-3-2 [3] and
ETSI EN 300 392-3-3 [4]), LAPD framing (ETSI ETS 300 402-1 [10] and ETSI ETS 300 402-2 [11]) and E.1 common
signalling channel 16 are presented in figure 3 for call control.
All or a sub-set of E.1 channels 1 to 15 and 17 to 31 shall be considered to be available for user information transport as
negotiated at the QSIG connection negotiation. It can be assumed that the E.1 channels are physically connected at the
same time as the LAPD connection is set-up on the common control channel and there shall be no additional E.1
channel set-up signalling at the link layer.
6 TETRA SwMI roles using ISI
6.1 Management configurations
6.1.1 Migration and group attachment configurations
6.1.1.1 SwMI roles for migration and group attachment
In order to support the Mobility Management (MM) functionality in different SwMIs for a given subscriber (whether
individual subscriber or group), the following SwMI roles are defined:
- home SwMI: this home SwMI performs the s
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prizemni snopovni radio (TETRA) - Govor in podatki (V+D) - 3. del: Medsebojno delovanje na medsistemskem vmesniku (ISI) - 1. poddel: Splošna zasnovaTerrestrial Trunked Radio (TETRA) - Voice plus Data (V+D) - Part 3: Interworking at the Inter-System Interface (ISI) -
Sub-part 1: General design33.070.10Prizemni snopovni radio (TETRA)Terrestrial Trunked Radio (TETRA)ICS:Ta slovenski standard je istoveten z:EN 300 392-3-1 V1.4.1SIST EN 300 392-3-1 V1.4.1:2016en01-marec-2016SIST EN 300 392-3-1 V1.4.1:2016SLOVENSKI
STANDARD
EUROPEAN STANDARD SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)2
Reference REN/TCCE-03236 Keywords interworking, radio, TETRA, V+D ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)3 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 4.1.0 General . 11 4.1.1 Stage 1 description . 11 4.1.2 Stage 2 description . 12 4.1.3 Stage 3 description . 12 4.2 Usage of Specification and Description Language (SDL) . 12 5 Usage of Private Signalling System 1 (PSS1) for TETRA . 13 5.1 PSS1 functionality . 13 5.2 Protocol stack for signalling information . 13 5.3 Generic Functional Protocol (GFP) . 14 5.4 Protocol stack for user information . 15 6 TETRA SwMI roles using ISI . 15 6.1 Management configurations . 15 6.1.1 Migration and group attachment configurations . 15 6.1.1.1 SwMI roles for migration and group attachment . 15 6.1.1.2 SwMI databases . 16 6.1.1.3 Migration scenarios . 17 6.1.1.4 Group attachment scenarios . 18 6.1.2 Group linking configurations . 18 6.2 Call configurations . 20 6.2.0 General . 20 6.2.1 Group call configuration . 20 6.2.2 Individual call configuration . 22 6.2.3 Transit . 23 6.3 User information encoding at the ISI . 23 7 Introduction to ISI ANFs . 23 7.0 General . 23 7.1 ANF-ISIMM. 24 7.2 ANF-ISIIC . 24 7.3 ANF-ISIGC . 24 7.4 ANF-ISISDS . 24 7.5 ANF-ISISS . 24 8 ISI Generic Functional Protocol (ISI GFP) . 24 8.1 Protocol model . 24 8.2 Services provided by the protocol model entities . 25 8.3 Addressing and transport . 26 8.3.1 Addressing . 26 8.3.2 Transport of ROSE APDUs . 27 8.3.2.0 General . 27 8.3.2.1 Call related ROSE APDUs . 27 8.3.2.2 Call unrelated ROSE APDUs . 27 SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)4 8.3.2.2.0 General . 27 8.3.2.2.1 Protocol for the establishment of a call independent signalling connection . 27 8.3.2.2.2 Use of a call independent signalling connection already established . 28 8.3.2.2.3 Clearing of a call independent signalling connection . 28 8.4 Remote Operations Service Entity (ROSE) requirements and operation definition . 29 8.4.1 General . 29 8.4.2 Return-result . 32 8.4.3 Return-error . 32 8.4.4 Reject . 33 8.5 Segmentation Service Element (SSE) . 33 8.5.0 Overview . 33 8.5.1 Procedures. 34 8.5.1.0 General . 34 8.5.1.1 Requirements for the segmentation procedure . 34 8.5.1.2 Requirements for the re-assembly procedure . 34 8.5.2 Segment encoding . 35 8.6 Co-ordination Function . 36 9 Security over the ISI . 36 9.0 General . 36 9.1 ITSI authentication . 37 9.2 End-to-end encryption . 37 9.3 End-to-end key management via ISI . 37 Annex A (normative): Security - supporting encryption over ISI . 38 A.1 Overview . 38 A.2 Encryption . 39 A.2.1 ISI relation to air interface and end-to-end encryption . 39 A.2.2 Air interface encryption key management via ISI . 39 A.2.2.0 General . 39 A.2.2.1 Secret Key of individual subscriber (K) . 40 A.2.2.2 Derived Cipher Key (DCK) . 40 A.2.2.3 Common Cipher Key (CCK) . 40 A.2.2.4 Static Cipher Key (SCK) . 40 A.2.2.5 Group Cipher Key (GCK) . 40 Annex B (informative): Maximum length of a ROSE APDU or a SSE segment encoded in a facility information element . 41 B.0 General . 41 B.1 PSS1 FACILITY message. 41 B.2 PSS1 basic call message . 42 B.3 Example of the encoding of an ANF-ISIMM MIGRATION PDU in a ROSE Invoke ROSE APDU in a call PISN FACILITY PDU . 43 Annex C (informative): Change requests . 45 History . 46
ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)5 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 European Standard (EN) has been produced by ETSI Technical Committee TETRA and Critical Communications Evolution (TCCE). The present document is part 3, sub-part 1 of a multi-part deliverable covering the Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D), Release 2 as identified below: ETSI EN 300 392-1:
"General network design"; ETSI EN 300 392-2:
"Air Interface (AI)"; ETSI EN 300 392-3: "Interworking at the Inter-System Interface (ISI)"; ETSI EN 300 392-3-1: "General design"; ETSI EN 300 392-3-2: "Additional Network Feature Individual Call (ANF-ISIIC)"; ETSI EN 300 392-3-3: "Additional Network Feature Group Call (ANF-ISIGC)"; ETSI EN 300 392-3-4: "Additional Network Feature Short Data Service (ANF-ISISDS)"; ETSI EN 300 392-3-5: "Additional Network Feature for Mobility Management (ANF-ISIMM)"; ETSI TS 100 392-3-6:
"Speech format implementation for circuit mode transmission"; ETSI TS 100 392-3-7:
"Speech Format Implementation for Packet Mode Transmission"; ETSI TS 100 392-3-8:
"Generic Speech Format Implementation"; ETSI ETS 300 392-4: "Gateways basic operation"; ETSI EN 300 392-5:
"Peripheral Equipment Interface (PEI)"; ETSI EN 300 392-7:
"Security"; ETSI EN 300 392-9:
"General requirements for supplementary services"; ETSI EN 300 392-10: "Supplementary services stage 1"; ETSI EN 300 392-11: "Supplementary services stage 2"; ETSI EN 300 392-12: "Supplementary services stage 3"; ETSI ETS 300 392-13: "SDL model of the Air Interface (AI)"; ETSI ETS 300 392-14: "Protocol Implementation Conformance Statement (PICS) proforma specification"; ETSI TS 100 392-15: "TETRA frequency bands, duplex spacings and channel numbering"; ETSI TS 100 392-16: "Network Performance Metrics"; ETSI TR 100 392-17: "TETRA V+D and DMO specifications"; SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)6 ETSI TS 100 392-18: "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 TS 100 392-2 and those may be the latest version of the document.
National transposition dates Date of adoption of this EN: 7 December 2015 Date of latest announcement of this EN (doa): 31 March 2016 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
30 September 2016 Date of withdrawal of any conflicting National Standard (dow): 30 September 2016
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. SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)7 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, called ISI Generic Functional Protocol (ISI GFP), upon which the definition of each ANF is based; and - the security requirements for the ISI. The ISI GFP specification 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 encryption over the ISI. Besides the ISI general design, the present document, interworking at the Inter-System Interface comprises the following other sub-parts: - Additional Network Feature - ISI Individual Call (ANF-ISIIC); - Additional Network Feature - ISI Group Call (ANF-ISIGC); - Additional Network Feature - ISI Short Data service (ANF-ISISDS); and - Additional Network Feature - ISI Mobility Management (ANF-ISIMM). 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 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. 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 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 EN 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 EN 300 392-3-4: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 4: Additional Network Feature Short Data Service (ANF-ISISDS)". [6] ETSI EN 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)". SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)8 [7] 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". [8] ETSI EN 300 392-7: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 7: Security". [9] ETSI EN 300 392-9: "Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 9: General requirements for supplementary services". [10] ETSI ETS 300 402-1: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Data link layer; Part 1: General aspects [ITU-T Recommendation Q.920 (1993), modified]". [11] ETSI ETS 300 402-2: "Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Data link layer; Part 2: General protocol specification [ITU-T Recommendation Q.921 (1993), modified]". [12] ISO/IEC 11572: "Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit mode bearer services -- Inter-exchange signalling procedures and protocol". [13] ISO/IEC 11582: "Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Generic functional protocol for the support of supplementary services -- Inter-exchange signalling procedures and protocol". [14] Recommendation ITU-T G.704: "Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels". [15] Recommendation ITU-T Q.931: "ISDN user-network interface layer 3 specification for basic call control". [16] 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)". [17] Recommendation ITU-T X.219: "Remote Operations: Model, notation and service definition". [18] Recommendation ITU-T X.882: "Information technology - Remote Operations: OSI realizations - Remote Operations Service Element (ROSE) protocol specificationRemote Operations: Protocol specification". 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 reference 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 E.164: "The international public telecommunication numbering plan". SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)9 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in ISO/IEC 11582 [13] and the following apply: call independent: property of information which is conveyed across the Q reference point in a message that does not use a call reference which has an associated user-information connection NOTE: In TETRA standards, the term call unrelated is used with the same meaning as call independent. call independent signalling connection: signalling connection established between ANF-ISI entities located in different Switching and Management Infrastructures that does not have an associated user-information connection call unrelated: See the definition of the term "call independent". co-ordination Function: entity which provides co-ordination between different ANF-ISI entities, ROSE, SSE and GFT Control for different TETRA basic and supplementary services 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) Generic Functional Transport Control (GFT Control) entity: entity that exists within a Switching and Management Infrastructure and provides a range of services to the ANF-ISI entities and ROSE via the co-ordination Function NOTE: The services are defined in clause 6 of ISO/IEC 11582 [13]. group attached SwMI: Switching and Management Infrastructure different from the home SwMI of the group considered in which at least one individual subscriber member of the group is attached to that group Group TETRA Subscriber Identity (GTSI): TETRA Subscriber Identity assigned to a group home SwMI: Switching and Management Infrastructure in which the subscription of a given user is registered NOTE: That user is defined as being a subscriber (see below the definition of that term). invocation: action taken by the user or by the service provider to execute a specific service function within real time 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 is broadcast by all TETRA base stations to uniquely 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 PDUs derived from an initial one 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). SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)10 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. supplementary service: 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 NOTE: The SwMI enables users to communicate with each other. terminating 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 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: Switching and Management Infrastructure different from the home SwMI in which a given subscriber is currently registered NOTE: The definition of this term implies that the given subscriber is mobile and has moved away from his home SwMI (to register in this visited SwMI). Therefore, it cannot apply to a group. 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 ANF Additional Network Feature ANF-ISI Additional Network Features of the Inter-System Interface APDU Application Protocol Data Unit ASN.1 Abstract Syntax Notation One BER Basic Encoding Rules BS Base Station C Conditional CAD Call Authorized by Dispatcher CCK Common Cipher Key CF Call Forwarding C-LDB Controlling Linking DataBase DCK Derived Cipher Key E.1 E-carrier signal level 1, 2 048 kbit/s ECMA European Computer Manufacturers Association GCK Group Cipher Key GFP Generic Functional Protocol GFT Generic Functional Transport G-HDB Group Home DataBase GTSI Group TETRA Subscriber Identity G-VDB Group Visited DataBase SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)11 HAC Home Authentication Centre HDB Home DataBase HDLC High-level Data Link Control I-HDB Individual Home DataBase ISI Inter-System Interface ISSI Individual Short Subscriber Identity ITSI Individual TETRA Subscriber Identity I-VDB Individual Visited DataBase K authentication Key KS Session Key LA Location Area LAPD Link Access Procedure for the D-Channel LS Line Station M Mandatory MCC Mobile Country Code MM Mobility Management MNC Mobile Network Code MNI Mobile Network Identity MRS Mobile Radio Stack MS Mobile Station MSISDN Mobile Station ISDN number NFE Network Facility Extension O Optional OTAR Over The Air Re-keying PC Protocol Control PDU Protocol Data Unit PINX Private Integrated Network eXchange PISN Private Integrated Services Network PN Party Number PSS1 Private Signalling System 1 PSTN Public Switched Telephone Network QSIG Q interface SIGnalling protocol ROSE Remote Operation Service Element RS Random Seed SCK Static Cipher Key SDL Specification and Description Language SDS Short Data Service SS Supplementary Services SSE Segmentation Service Element SSI Short Subscriber Identity SwMI TETRA Switching and Management Infrastructure TSI TETRA Subscriber Identity V+D Voice plus Data VAC Visitor Authentication Centre VDB Visitor DataBase 4 ISI standardization methodology 4.1 3 stage methodology 4.1.0 General The ISI Additional Network Features (ANFs), listed in clause 7, are standardized using the modelling method defined in Recommendation ITU-T I.130 [i.2]. 4.1.1 Stage 1 description Stage 1 description defines the services which the standardized ANF entity provides to the concerned service users, e.g. SwMI entities in the case of TETRA. The services are visible at the Service Access Points (SAPs). The stage 1 description is intended to allow an understanding of the services independently from the implementation. SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)12 For normal point-to-point services the service model is shown in figure 1. ANF EntitySAPSwMI-1userSAPSwMI-2userServiceService Figure 1: Service model for point-to-point services For point-to-multipoint services the service model is shown in figure 2. SAPSAPSAPuseruseruserSwMI-1SwMI-3SwMI-2ANF EntityServiceServiceService Figure 2: Service model for point-to-multipoint services 4.1.2 Stage 2 description Stage 2 description identifies the functional capabilities and the information flows needed to support the service as described in stage 1. 4.1.3 Stage 3 description Stage 3 description gives a precise specification of the signalling protocols for the ANF services, i.e. the encoding rules for the information flows and the corresponding procedures. 4.2 Usage of Specification and Description Language (SDL) SDL defined in Recommendation ITU-T Z.100 [i.3] is used to identify and represent the behaviour of the concerned ANF in providing services. SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)13 5 Usage of Private Signalling System 1 (PSS1) for TETRA 5.1 PSS1 functionality The TETRA ISI application is built on top of the PSS1 protocol stack for interconnecting Private Integrated services Network eXchanges (PINXs) to form Private Integrated Services Network (PISN). PSS1 is the ISO term; the PSS1 protocol is also known, informally, as QSIG, generic term created by the European Computer Manufacturers Association (ECMA) which developed most of the signalling protocols comprised in the PSS1 protocol. TETRA uses the standard functionalities defined for PSS1: - signalling for the support of circuit-mode basic services (see note); - Generic Functional Protocol (GFP) originally defined for the support of supplementary services. NOTE: The definition of PSS1 basic call in ISO/IEC 11572 [12] is as follows:
"The basic call is a single invocation of a basic service. Signalling procedures are used for establishing, maintaining and clearing a circuit-mode call at an interface between two PINXs. These signalling procedures are defined in terms of messages exchanged over a signalling carriage mechanism connection within the signalling channel of the Inter-PINX link. The result of successful basic call establishment is a connection for the purpose of user information transfer". 5.2 Protocol stack for signalling information Figure 3 shows how the protocols for TETRA ANF which apply at the ISI are built on top of the PSS1 protocol stack. The Remote Operation Service Element (ROSE) is used to convey ANF-ISI Protocol Data Units (PDU). For the TETRA ANF-ISIIC and ANF-ISIGC protocols, figure 3 has to be supplemented with a direct interface to PSS1 protocol control for basic call. In addition, basic call correlation shall be ensured for the delivery of the corresponding PDUs by ANF-ISIIC and ANF-ISIGC through the protocol stack shown on figure 3, e.g. the ANF-ISIIC SETUP PDU shall have to be sent in the PSS1 SETUP message for establishing the PISN call to be used by the invoked ANF-ISIIC. NOTE 1: The PSS1 basic call protocol is defined in ISO/IEC 11572 [12]. NOTE 2: The term "basic call correlation" has been used in the preceding clause as implicitly defined in notes to tables 3, 5, 7, and 9 of ISO/IEC 11582 [13]. Basic call correlation shall also be ensured for the delivery of specific supplementary service PDUs through ANF-ISISS, depending of the definition of those supplementary services. SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)14 SwMI-1
ITU-T Rec. X.229
SwMI-2 ISO/IEC 11582
ISO/IEC 11572
Layer 1 TETRA ANF Specific TETRA operation Specific TETRA operation ITU-T Rec. X.229
ISO/IEC 11582
ISO/IEC 11572
TETRA ANF Layer 1 ETS 300 402-1 and 2
(see note) ETS 300 402-1 and 2 (see note)
NOTE: Layer 2 protocol depends on the type of the inter-connection.
Figure 3: PSS1 protocol stack for TETRA NOTE 3: Formally the protocol stack shown in figure 3 applies only for TETRA PDUs sent together with PSS1 basic call messages (e.g. PSS1 SETUP or CONNECT messages): i.e. the ISO/IEC 11572 [12] protocol is not part of the protocol stack for TETRA PDUs sent in PSS1 FACILITY messages - although ISO/IEC 11572 [12] is always called for, if only to establish the underlying signalling carriage mechanism - see clause 9 of ISO/IEC 11572 [12]. However, since the scope of the present document is not to define the PSS1 protocol model, it has not been judged useful to draw another figure applicable to the case of TETRA PDUs sent in PSS1 FACILITY messages, where the ISO/IEC 11572 [12] protocol would not appear. The protocol stack shown in figure 3 is for signalling information exchange on the common signalling channel i.e. D-channel. LAPD framing as defined in ETSI ETS 300 402-1 [10] and ETSI ETS 300 402-2 [11] and for E.1, refer to Recommendation ITU-T G.704 [14], common signalling channel 16 shall be used. Protocol stack for user information exchange is presented in clause 5.4. 5.3 Generic Functional Protocol (GFP) The GFP as defined in ISO/IEC 11582 [13] shall be used for all TETRA ANFs of the ISI (ANF-ISI). ROSE operations shall be used to convey ANF-ISI information in facility information elements, as described in clause 8. These facility information elements shall be included in PSS1 messages in accordance with ISO/IEC 11582 [13]. The specification given in clause 7.1.1.1 of ISO/IEC 11582 [13] as to when an SwMI can send a PSS1 FACILITY message at the earliest shall be understood as follows: - such message can be sent by a receiving SwMI after it has sent a PSS1 CALL PROCEEDING message (following reception of a PSS1 SETUP message); - such message can be sent by a source SwMI after it has received one of the following PSS1 messages: FACILITY, PROGRESS, ALERTING, CONNECT. When the call independent signalling connection is used, it shall be connection oriented. NOTE: This is in line with the choice made for the definition of all existing supplementary services of the PSS1 protocols. SIST EN 300 392-3-1 V1.4.1:2016

ETSI ETSI EN 300 392-3-1 V1.4.1 (2015-12)15 5.4 Protocol stack for user information Call control manages transportation of user information e.g. TETRA coded speech on BQ channels as presented in figure 3a. In this protocol stack the E.1 channels are 64 kbit/s channels supporting unrestricted digital information, refer to Recommendation ITU-T G.704 [14]. TETRA coded user informationCall control signallingCall control signallingTETRA coded user informationHDCL framingLAPD framingLAPD framingHDCL framingE.1 channel selectionE.1 channel 16 (Q-SIG)Common channel signallingE.1 channel 16 (Q-SIG)E.1 channel selectionE.1 channel 1User informationE.1 channel 1etc.etc.etc.E.1 channel 31User informationE.1 channel 31 Figure 3a: User information protocol stack For speech transmission the TETRA coded user information is speech frames that shall be carried in an E.1 channel using HDLC frames, refer to ETSI TS 100 392-3-8 [7], annex B. The call control negotiates the E.1 channel for each call instance and locally select the negotiated E.1 channel. The mapping between TETRA ISI channels and E.1 B-channels is defined in ETSI TS 100 392-3-8 [7], annex A. Call control signalling (ETSI EN 300 392-3-2 [3] and ETSI EN 300 392-3-3 [4]), LAPD framing (ETSI ETS 300 402-1 [10] and ETSI ETS 300 402-2 [11]) and E.1 common signalling channel 16 are presented in figure 3 for call control. All or a sub-set of E.1 channels 1 to 15 and 17 to 31 shall be considered to be available for user information transport as negotiated at the QSIG connection negotiation. It can be assumed that the E.1 channels are physically connected at the same time as the LAPD connection is set-up on the common control channel and there shall be no additional E.1 channel set-up signalling at the link layer. 6 TETRA SwMI roles using ISI 6.1 Management configurations 6.1.1 Migration and group attachment configurations 6.1.1.1 SwMI roles for migration and group attachment In order to support the Mobility Management (MM) functionality in different SwMIs for a given subscriber (whether individual subscriber or group), the following SwMI roles are defined: - home SwMI: this home SwMI performs the subscriber MM functions related to Home DataBase (HDB). The Mobile Network Identity (MNI) of the home SwMI shall be equal to the extended part of the TSI of the subscriber (whether individual subscriber or group); - visited SwMI: this SwMI performs the individual subscriber MM functions related to the Individual Visitor DataBase (I-VDB). By definition its MNI is different from the extended part of the TSI of that subscriber (since this SwMI is different from the subscriber home SwMI); SIST E
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