ETSI EN 300 392-3-1 V1.3.1 (2010-08)
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 1: General design
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D); Part 3: Interworking at the Inter-System Interface (ISI); Sub-part 1: General design
REN/TETRA-03192
Prizemni snopovni radio (TETRA) - Govor in podatki (V+D) - 3. del: Medsebojno delovanje na medsistemskem vmesniku (ISI) - 1. poddel: Splošna zasnova
Pričujoči dokument določa splošne vidike medsebojnega delovanja na medsistemskem vmesniku (ISI) za prizemni snopovni radijski (TETRA) sistem, ki podpira govor in podatke (V+D). Ti določajo splošne koncepte, ki so osnova ISI delovanja med TETRA sistemi. Predstavlja dodatne mrežne značilnosti (ANF), uporabljene pri ISI in določa:
- splošen protokolni mehanizem, imenovan ISI splošni protokol delovanja (ISI GFP), na katerem je osnovana vsaka definicija ANF; in
- varnostne zahteve za ISI.
ISI GFP specifikacija velja za vso TETRA komutirano in upravljalno infrastrukturo (SwMI), ki podpira ISI. Varnostne zahteve za ISI veljajo samo za SwMI ki podpirajo avtentikacijo ali enkripcijo skozi ISI. Poleg splošnega ISI načrta, pričujočega poddela, medsebojno delovanje na medsistemskem vmesniku sestavlja ostale poddele:
- dodatne mrežne značilnosti – ISI posamezni klic (ANF-ISIIC);
- dodatne mrežne značilnosti – ISI skupinski klic (ANF-ISIGC);
- dodatne mrežne značilnosti - ISI kratke podatkovne storitve (ANF-ISISDS); in
- dodatne mrežne značilnosti – ISI upravljanje mobilnosti (ANF-ISIMM).
General Information
Standards Content (Sample)
Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
European Standard (Telecommunications series)
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI);
Sub-part 1: General design
2 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
Reference
REN/TETRA-03192
Keywords
interworking, radio, TETRA, V+D
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
Contents
Intellectual Property Rights . 5
Foreword . 5
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 9
3 Definitions and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 11
4 ISI standardization methodology . 12
4.1 3 stage methodology . 12
4.1.1 Stage 1 description . 12
4.1.2 Stage 2 description . 13
4.1.3 Stage 3 description . 13
4.2 Usage of Specification and Description Language (SDL) . 13
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
6.2.1 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
7.1 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
8.3.2.1 Call related ROSE APDUs . 27
8.3.2.2 Call unrelated ROSE APDUs . 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 . 36
8.3.2.2.3 Clearing of a call independent signalling connection already established . 36
8.4 Remote Operations Service Entity (ROSE) requirements and operation definition . 36
ETSI
4 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
8.4.1 General . 36
8.4.2 Return-result . 40
8.4.3 Return-error . 40
8.4.4 Reject . 41
8.5 Segmentation Service Element (SSE) . 41
8.5.1 Procedures. 41
8.5.1.1 Requirements for the segmentation procedure . 42
8.5.1.2 Requirements for the re-assembly procedure . 42
8.5.2 Segment encoding . 43
8.6 Co-ordination Function . 44
9 Security over the ISI . 44
9.1 ITSI authentication . 45
9.2 End-to-end encryption . 45
9.3 End-to-end key management via ISI . 45
Annex A (normative): Security - supporting encryption over ISI . 46
A.1 Overview . . 46
A.2 Encryption . 47
A.2.1 ISI relation to air interface and end-to-end encryption . 47
A.2.2 Air interface encryption key management via ISI . 47
A.2.2.1 Secret Key of individual subscriber (K) . 47
A.2.2.2 Derived Cipher Key (DCK) . 48
A.2.2.3 Common Cipher Key (CCK) . 48
A.2.2.4 Static Cipher Key (SCK) . 48
A.2.2.5 Group Cipher Key (GCK) . 48
Annex B (informative): Maximum length of a ROSE APDU or a SSE segment encoded in a
facility information element . 49
B.1 PSS1 FACILITY message. 49
B.2 PSS1 basic call message . 50
B.3 Example of the encoding of an ANF-ISIMM MIGRATION PDU in a ROSE Invoke ROSE
APDU in a call PISN FACILITY PDU . 51
Annex C (informative): Change requests . 53
History . 54
ETSI
5 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
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 Technical Committee Terrestrial
Trunked Radio (TETRA), and is now submitted for the ETSI standards One-step 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:
EN 300 392-1: "General network design";
EN 300 392-2: "Air Interface (AI)";
EN 300 392-3: "Interworking at the Inter-System Interface (ISI)";
EN 300 392-3-1: "General design";
EN 300 392-3-2: "Additional Network Feature Individual Call (ANF-ISIIC)";
EN 300 392-3-3: "Additional Network Feature Group Call (ANF-ISIGC)";
EN 300 392-3-4: "Additional Network Feature Short Data Service (ANF-ISISDS)";
EN 300 392-3-5: "Additional Network Feature for Mobility Management (ANF-ISIMM)";
TS 100 392-3-6: "Speech format implementation for circuit mode transmission";
TS 100 392-3-7: "Speech Format Implementation for Packet Mode Transmission";
TS 100 392-3-8: "Generic Speech Format Implementation";
ETS 300 392-4: "Gateways basic operation";
EN 300 392-5: "Peripheral Equipment Interface (PEI)";
EN 300 392-7: "Security";
EN 300 392-9: "General requirements for supplementary services";
EN 300 392-10: "Supplementary services stage 1";
EN 300 392-11: "Supplementary services stage 2";
EN 300 392-12: "Supplementary services stage 3";
ETS 300 392-13: "SDL model of the Air Interface (AI)";
ETS 300 392-14: "Protocol Implementation Conformance Statement (PICS) proforma specification";
TS 100 392-15: "TETRA frequency bands, duplex spacings and channel numbering";
TS 100 392-16: "Network Performance Metrics";
ETSI
6 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
TR 100 392-17: "TETRA V+D and DMO specifications";
TS 100 392-18: "Air interface optimized applications".
NOTE: 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.
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
ETSI
7 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
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 sub-part, 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
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.
• Non-specific reference may be made only to a complete document or a part thereof and only in the following
cases:
- if it is accepted that it will be possible to use all future changes of the referenced document for the
purposes of the referring document;
- for informative references.
Referenced documents which are not found to be publicly available in the expected location might be found at
http://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long term validity.
2.1 Normative references
The following referenced documents are indispensable for the application of the present document. For dated
references, only the edition cited applies. For non-specific references, the latest edition of the referenced document
(including any amendments) applies.
[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)".
ETSI
8 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
[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)".
[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] ITU-T Recommendation G.704: "Synchronous frame structures used at 1544, 6312, 2048, 8448
and 44 736 kbit/s hierarchical levels".
[15] ITU-T Recommendation Q.931: "ISDN user-network interface layer 3 specification for basic call
control".
[16] ITU-T Recommendation X.690: "Information technology - ASN.1 encoding rules: Specification of
Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding
Rules (DER)".
[17] ITU-T Recommendation X.219: "Remote Operations: Model, notation and service definition".
[18] ITU-T Recommendation X.229: "Remote Operations: Protocol specification".
ETSI
9 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
2.2 Informative references
The following referenced documents are not essential to the use of the present document but they assist the user with
regard to a particular subject area. For non-specific references, the latest version of the referenced document (including
any amendments) applies.
[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] ITU-T Recommendation I.130: "Method for the characterization of telecommunication services
supported by an ISDN and network capabilities of an ISDN".
[i.3] ITU-T Recommendation Z.100: "Specification and description language (SDL)".
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 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 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 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: an 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).
ETSI
10 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
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).
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.
ETSI
11 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Authentication Centre
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
BS Base Station
C Conditional
CCK Common Cipher Key
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
HAC Home Authentication Centre
HDB Home DataBase
HDLC High-level Data Link Control
I-HDB Individual Home DataBase
ISI Inter-System Interface
ITSI Individual TETRA Subscriber Identity
I-VDB Individual Visited DataBase
K authentication 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
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
PSS1 Private Signalling System 1
ROSE Remote Operation Service Element
RS Random Seed
SAP Service Access Point
SCK Static Cipher Key
SDL Specification and Description Language
SDS Short Data Service
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
(V)ASSI Visiting Alias Short Subscriber Identity
ETSI
12 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
VDB Visitor DataBase
(V)GSSI Visiting Group Short Subscriber Identity
4 ISI standardization methodology
4.1 3 stage methodology
The ISI Additional Network Features (ANFs), listed in clause 7, are standardized using the modelling method defined
in ITU-T Recommendation 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.
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
ETSI
13 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
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 ITU-T Recommendation Z.100 [i.3] is used to identify and represent the behaviour of the concerned
ANF in providing services.
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 paragraph 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.
ETSI
14 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
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 ETS 300 402-1 [10] and ETS 300 402-2 [11] and E.1, refer to ITU-T
Recommendation 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 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
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 ITU-T Recommendation 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 channel 16 channel channel 16 E.1 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 HDCL frames, refer to 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 TS 100 392-3-8 [7], annex A. Call control signalling (EN 300 392-3-2 [3] and EN 300 392-3-3 [4]), LAPD
framing (ETS 300 402-1 [10] and 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);
ETSI
16 Final draft ETSI EN 300 392-3-1 V1.3.0 (2010-04)
NOTE 1: When the individual subscriber is registered in his home SwMI, this SwMI also performs the
MM functions related to the I-VDB, but in such a case except possibly for the de-registration operation,
the whole MM functionality for that subscriber is supported within one single SwMI and therefore is
outside the scope of ISI standardization. Regarding the de-registration operation, it will take place over
the ISI in the specific case where the subscriber was previously registered in a visited SwMI and has
migrated back to his home SwMI (see clause 6.1.1.3 about individual subscriber migration): but even in
this case there is no need to define other SwMI roles than the two defined above (home SwMI and visited
SwMI).
- group attached SwMI: this SwMI performs the group MM functions related to the Group Visitor DataBase
(G-VDB). By definition its MNI is different from the extended part of the TSI of the group (subscriber) (since
this SwMI is different from the group home SwMI).
NOTE 2: Generally individual subscribers will be attached to the group in the group home SwMI (actually one
might expect that most of them will); this SwMI will then also perform the MM functions related to the
G-VDB, but in such a case except possibly for the detachment operation of group attached SwMIs, the
whole MM functionality for that subscriber is supported within one single SwMI and therefore is outside
the scope of ISI standardization. Regarding the detachment operation of a group attached SwMI, it will
take place over the ISI in the specific case where all individual subscribers member of the group
previously registered in that SwMI have migrated away from it (see clause 6.1.1.3 about individual
subscriber migration): but even in this case there is no need to define other SwMI roles than those of
home SwMI and group attached SwMI defined above.
NOTE 3: Since the home SwMI of individual subscribers members of a group may be different from the home
SwMI of that group, the group attached SwMIs for that group will not necessarily be visited SwMIs of
the members of that group - but may also be their home SwMIs.
6.1.1.2 SwMI databases
In order to support the individual subscriber and group MM functionality in the SwMIs, the following database is
defined:
• the HDB comprises information about the individual and/or group subscribers. It is located in the subscriber's
home SwMI. The HDB is divided into Individual HDB (I-HDB
...
European Standard (Telecommunications series)
Terrestrial Trunked Radio (TETRA);
Voice plus Data (V+D);
Part 3: Interworking at the Inter-System Interface (ISI);
Sub-part 1: General design
2 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
Reference
REN/TETRA-03192
Keywords
interworking, radio, TETRA, V+D
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88
Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, please send your comment to one of the following services:
http://portal.etsi.org/chaircor/ETSI_support.asp
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2010.
All rights reserved.
TM TM TM TM
DECT , PLUGTESTS , UMTS , TIPHON , the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered
for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
LTE™ is a Trade Mark of ETSI currently being registered
for the benefit of its Members and of the 3GPP Organizational Partners.
GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.
ETSI
3 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
Contents
Intellectual Property Rights . 5
Foreword . 5
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
4.1.1 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
6.2.1 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
7.1 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
8.3.2.1 Call related ROSE APDUs . 27
8.3.2.2 Call unrelated ROSE APDUs . 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 . 36
8.3.2.2.3 Clearing of a call independent signalling connection already established . 36
8.4 Remote Operations Service Entity (ROSE) requirements and operation definition . 36
ETSI
4 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
8.4.1 General . 36
8.4.2 Return-result . 40
8.4.3 Return-error . 40
8.4.4 Reject . 41
8.5 Segmentation Service Element (SSE) . 41
8.5.1 Procedures. 41
8.5.1.1 Requirements for the segmentation procedure . 42
8.5.1.2 Requirements for the re-assembly procedure . 42
8.5.2 Segment encoding . 43
8.6 Co-ordination Function . 44
9 Security over the ISI . 44
9.1 ITSI authentication . 45
9.2 End-to-end encryption . 45
9.3 End-to-end key management via ISI . 45
Annex A (normative): Security - supporting encryption over ISI . 46
A.1 Overview . . 46
A.2 Encryption . 47
A.2.1 ISI relation to air interface and end-to-end encryption . 47
A.2.2 Air interface encryption key management via ISI . 47
A.2.2.1 Secret Key of individual subscriber (K) . 47
A.2.2.2 Derived Cipher Key (DCK) . 48
A.2.2.3 Common Cipher Key (CCK) . 48
A.2.2.4 Static Cipher Key (SCK) . 48
A.2.2.5 Group Cipher Key (GCK) . 48
Annex B (informative): Maximum length of a ROSE APDU or a SSE segment encoded in a
facility information element . 49
B.1 PSS1 FACILITY message. 49
B.2 PSS1 basic call message . 50
B.3 Example of the encoding of an ANF-ISIMM MIGRATION PDU in a ROSE Invoke ROSE
APDU in a call PISN FACILITY PDU . 51
Annex C (informative): Change requests . 53
History . 54
ETSI
5 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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 Technical Committee Terrestrial
Trunked Radio (TETRA).
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:
EN 300 392-1: "General network design";
EN 300 392-2: "Air Interface (AI)";
EN 300 392-3: "Interworking at the Inter-System Interface (ISI)";
EN 300 392-3-1: "General design";
EN 300 392-3-2: "Additional Network Feature Individual Call (ANF-ISIIC)";
EN 300 392-3-3: "Additional Network Feature Group Call (ANF-ISIGC)";
EN 300 392-3-4: "Additional Network Feature Short Data Service (ANF-ISISDS)";
EN 300 392-3-5: "Additional Network Feature for Mobility Management (ANF-ISIMM)";
TS 100 392-3-6: "Speech format implementation for circuit mode transmission";
TS 100 392-3-7: "Speech Format Implementation for Packet Mode Transmission";
TS 100 392-3-8: "Generic Speech Format Implementation";
ETS 300 392-4: "Gateways basic operation";
EN 300 392-5: "Peripheral Equipment Interface (PEI)";
EN 300 392-7: "Security";
EN 300 392-9: "General requirements for supplementary services";
EN 300 392-10: "Supplementary services stage 1";
EN 300 392-11: "Supplementary services stage 2";
EN 300 392-12: "Supplementary services stage 3";
ETS 300 392-13: "SDL model of the Air Interface (AI)";
ETS 300 392-14: "Protocol Implementation Conformance Statement (PICS) proforma specification";
TS 100 392-15: "TETRA frequency bands, duplex spacings and channel numbering";
TS 100 392-16: "Network Performance Metrics";
ETSI
6 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
TR 100 392-17: "TETRA V+D and DMO specifications";
TS 100 392-18: "Air interface optimized applications".
NOTE: 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.
National transposition dates
Date of adoption of this EN: 2 August 2010
Date of latest announcement of this EN (doa): 30 November 2010
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 May 2011
Date of withdrawal of any conflicting National Standard (dow): 31 May 2011
ETSI
7 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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 sub-part, 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
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.
2.1 Normative references
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)".
ETSI
8 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
[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)".
[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] ITU-T Recommendation G.704: "Synchronous frame structures used at 1544, 6312, 2048, 8448
and 44 736 kbit/s hierarchical levels".
[15] ITU-T Recommendation Q.931: "ISDN user-network interface layer 3 specification for basic call
control".
[16] ITU-T Recommendation X.690: "Information technology - ASN.1 encoding rules: Specification of
Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding
Rules (DER)".
[17] ITU-T Recommendation X.219: "Remote Operations: Model, notation and service definition".
[18] ITU-T Recommendation X.229: "Remote Operations: Protocol specification".
2.2 Informative references
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI EN 300 395-1: "Terrestrial Trunked Radio (TETRA); Speech CODEC for full-rate traffic
channel; Part 1: General description of speech functions".
[i.2] ITU-T Recommendation I.130: "Method for the characterization of telecommunication services
supported by an ISDN and network capabilities of an ISDN".
[i.3] ITU-T Recommendation Z.100: "Specification and description language (SDL)".
ETSI
9 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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 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 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 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: an 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).
ETSI
10 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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:
AC Authentication Centre
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
BS Base Station
C Conditional
CCK Common Cipher Key
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
HAC Home Authentication Centre
HDB Home DataBase
HDLC High-level Data Link Control
I-HDB Individual Home DataBase
ETSI
11 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
ISI Inter-System Interface
ITSI Individual TETRA Subscriber Identity
I-VDB Individual Visited DataBase
K authentication 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
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
PSS1 Private Signalling System 1
ROSE Remote Operation Service Element
RS Random Seed
SAP Service Access Point
SCK Static Cipher Key
SDL Specification and Description Language
SDS Short Data Service
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
(V)ASSI Visiting Alias Short Subscriber Identity
VDB Visitor DataBase
(V)GSSI Visiting Group Short Subscriber Identity
4 ISI standardization methodology
4.1 3 stage methodology
The ISI Additional Network Features (ANFs), listed in clause 7, are standardized using the modelling method defined
in ITU-T Recommendation 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.
ETSI
12 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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 ITU-T Recommendation Z.100 [i.3] is used to identify and represent the behaviour of the concerned
ANF in providing services.
ETSI
13 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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 paragraph 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.
ETSI
14 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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 ETS 300 402-1 [10] and ETS 300 402-2 [11] and E.1, refer to ITU-T
Recommendation 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 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
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 ITU-T Recommendation 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 channel 16 channel channel 16 E.1 channel
selection (Q-SIG) signalling (Q-SIG) selection
E.1 User information E.1 channel
channel 1 1
etc. etc. etc.
E.1 E.1 channel
User information
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 HDCL frames, refer to 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 TS 100 392-3-8 [7], annex A. Call control signalling (EN 300 392-3-2 [3] and EN 300 392-3-3 [4]), LAPD
framing (ETS 300 402-1 [10] and 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);
ETSI
16 ETSI EN 300 392-3-1 V1.3.1 (2010-08)
NOTE 1: When the individual subscriber is registered in his home SwMI, this SwMI also performs the
MM functions related to the I-VDB, but in such a case except possibly for the de-registration operation,
the whole MM functionality for that subscriber is supported within one single SwMI and therefore is
outside the scope of ISI standardization. Regarding the de-registration operation, it will take place over
the ISI in the specific case where the subscriber was previously registered in a visited SwMI and has
migrated back to his home SwMI (see clause 6.1.1.3 about individual subscriber migration): but even in
this case there is no need to define other SwMI roles than the two defined above (home SwMI and visited
SwMI).
- group attached SwMI: this SwMI performs the group MM functions related to the Group Visitor DataBase
(G-VDB). By definition its MNI is different from the extended part of the TSI of the group (subscriber) (since
this SwMI is different from the group home SwMI).
NOTE 2: Generally individual subscribers will be attached to the group in the group home SwMI (actually one
might expect that most of them will); this SwMI will then also perform the MM functions related to the
G-VDB, but in such a case except possibly for the detachment operation of group attached SwMIs, the
whole MM functionality for that subscriber is supported within one single SwMI and therefore is outside
the scope of ISI standardization. Regarding the detachment operation of a group attached SwMI, it will
take place over the ISI in the specific case where all individual subscribers member of the group
previously registered in that SwMI have migrated away from it (see clause 6.1.1.3 about individual
subscriber migration): but even in this case there is no need to define other SwMI roles than those of
home SwMI and group attached SwMI defined above.
NOTE 3: Since the home SwMI of individual subscribers members of a group may be different from the home
SwMI of that group, the group attached SwMIs for that group will not necessarily be visited SwMIs of
the members of that group - but may also be their home SwMIs.
6.1.1.2 SwMI databases
In order to support the individual subscriber and group MM functionality in the SwMIs, the following database is
defined:
• the HDB comprises information about the individual and/or group subscribers. It is located in the subscriber's
home SwMI. The HDB is divided into Individual HDB (I-HDB) and Group HDB (G-HDB):
- I-HDB contains the location tracking amongst SwMIs, i.e. in which SwMI is an individual subscriber
currently located. In addition, the I-HDB is able to provide the basic and optionally the supplementary
service migration profiles of the individual subscriber at migration;
- G-HDB contains the group attachment tracking amongst SwMIs, i.e. which SwMIs are group attached.
In addition, the G-HDB is able to provide the basic and optionally the supplementary service migration
profiles of the group (subscriber) at group attachment;
• the VDB comprises temporary information about individual and/or group subscribers. For a given individual
subscriber member of one or more groups, it is located in th
...
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 Version 1.3.1SIST EN 300 392-3-1 V1.3.1:2010en01-oktober-2010SIST EN 300 392-3-1 V1.3.1:2010SLOVENSKI
STANDARD
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)2
Reference REN/TETRA-03192 Keywords interworking, radio, TETRA, V+D ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
Tel.: +33 4 92 94 42 00
Fax: +33 4 93 65 47 16
Siret N° 348 623 562 00017 - NAF 742 C Association à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88
Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2010. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE™ is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 300 392-3-1 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)3 Contents Intellectual Property Rights . 5 Foreword . 5 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 4.1.1 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 6.2.1 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 7.1 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 8.3.2.1 Call related ROSE APDUs . 27 8.3.2.2 Call unrelated ROSE APDUs . 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 . 36 8.3.2.2.3 Clearing of a call independent signalling connection already established . 36 8.4 Remote Operations Service Entity (ROSE) requirements and operation definition . 36 SIST EN 300 392-3-1 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)4 8.4.1 General . 36 8.4.2 Return-result . 40 8.4.3 Return-error . 40 8.4.4 Reject . 41 8.5 Segmentation Service Element (SSE) . 41 8.5.1 Procedures. 41 8.5.1.1 Requirements for the segmentation procedure . 42 8.5.1.2 Requirements for the re-assembly procedure . 42 8.5.2 Segment encoding . 43 8.6 Co-ordination Function . 44 9 Security over the ISI . 44 9.1 ITSI authentication . 45 9.2 End-to-end encryption . 45 9.3 End-to-end key management via ISI . 45 Annex A (normative): Security - supporting encryption over ISI . 46 A.1 Overview . 46 A.2 Encryption . 47 A.2.1 ISI relation to air interface and end-to-end encryption . 47 A.2.2 Air interface encryption key management via ISI . 47 A.2.2.1 Secret Key of individual subscriber (K) . 47 A.2.2.2 Derived Cipher Key (DCK) . 48 A.2.2.3 Common Cipher Key (CCK) . 48 A.2.2.4 Static Cipher Key (SCK) . 48 A.2.2.5 Group Cipher Key (GCK) . 48 Annex B (informative): Maximum length of a ROSE APDU or a SSE segment encoded in a facility information element . 49 B.1 PSS1 FACILITY message. 49 B.2 PSS1 basic call message . 50 B.3 Example of the encoding of an ANF-ISIMM MIGRATION PDU in a ROSE Invoke ROSE APDU in a call PISN FACILITY PDU . 51 Annex C (informative): Change requests . 53 History . 54
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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://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 Technical Committee Terrestrial Trunked Radio (TETRA). 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: EN 300 392-1: "General network design"; EN 300 392-2: "Air Interface (AI)"; EN 300 392-3: "Interworking at the Inter-System Interface (ISI)"; EN 300 392-3-1: "General design"; EN 300 392-3-2: "Additional Network Feature Individual Call (ANF-ISIIC)"; EN 300 392-3-3: "Additional Network Feature Group Call (ANF-ISIGC)"; EN 300 392-3-4: "Additional Network Feature Short Data Service (ANF-ISISDS)"; EN 300 392-3-5: "Additional Network Feature for Mobility Management (ANF-ISIMM)"; TS 100 392-3-6: "Speech format implementation for circuit mode transmission"; TS 100 392-3-7: "Speech Format Implementation for Packet Mode Transmission"; TS 100 392-3-8: "Generic Speech Format Implementation"; ETS 300 392-4: "Gateways basic operation"; EN 300 392-5: "Peripheral Equipment Interface (PEI)"; EN 300 392-7: "Security"; EN 300 392-9: "General requirements for supplementary services"; EN 300 392-10: "Supplementary services stage 1"; EN 300 392-11: "Supplementary services stage 2"; EN 300 392-12: "Supplementary services stage 3"; ETS 300 392-13: "SDL model of the Air Interface (AI)"; ETS 300 392-14: "Protocol Implementation Conformance Statement (PICS) proforma specification"; TS 100 392-15: "TETRA frequency bands, duplex spacings and channel numbering"; TS 100 392-16: "Network Performance Metrics"; SIST EN 300 392-3-1 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)6 TR 100 392-17: "TETRA V+D and DMO specifications"; TS 100 392-18: "Air interface optimized applications". NOTE: 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.
National transposition dates Date of adoption of this EN: 2 August 2010 Date of latest announcement of this EN (doa): 30 November 2010 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 May 2011 Date of withdrawal of any conflicting National Standard (dow): 31 May 2011
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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 sub-part, 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 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. 2.1 Normative references 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)". SIST EN 300 392-3-1 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)8 [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)". [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] ITU-T Recommendation G.704: "Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels". [15] ITU-T Recommendation Q.931: "ISDN user-network interface layer 3 specification for basic call control". [16] ITU-T Recommendation X.690: "Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER)". [17] ITU-T Recommendation X.219: "Remote Operations: Model, notation and service definition". [18] ITU-T Recommendation X.229: "Remote Operations: Protocol specification". 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] ETSI EN 300 395-1: "Terrestrial Trunked Radio (TETRA); Speech CODEC for full-rate traffic channel; Part 1: General description of speech functions". [i.2] ITU-T Recommendation I.130: "Method for the characterization of telecommunication services supported by an ISDN and network capabilities of an ISDN". [i.3] ITU-T Recommendation Z.100: "Specification and description language (SDL)". SIST EN 300 392-3-1 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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 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 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 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: an 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 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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: AC Authentication Centre 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 BS Base Station C Conditional CCK Common Cipher Key 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 HAC Home Authentication Centre HDB Home DataBase HDLC High-level Data Link Control I-HDB Individual Home DataBase SIST EN 300 392-3-1 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)11 ISI Inter-System Interface ITSI Individual TETRA Subscriber Identity I-VDB Individual Visited DataBase K authentication 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 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 PSS1 Private Signalling System 1 ROSE Remote Operation Service Element RS Random Seed SAP Service Access Point SCK Static Cipher Key SDL Specification and Description Language SDS Short Data Service 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 (V)ASSI Visiting Alias Short Subscriber Identity VDB Visitor DataBase (V)GSSI Visiting Group Short Subscriber Identity 4 ISI standardization methodology 4.1 3 stage methodology The ISI Additional Network Features (ANFs), listed in clause 7, are standardized using the modelling method defined in ITU-T Recommendation 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 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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 ITU-T Recommendation 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 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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 paragraph 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 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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 ETS 300 402-1 [10] and ETS 300 402-2 [11] and E.1, refer to ITU-T Recommendation 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 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)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 ITU-T Recommendation 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 HDCL frames, refer to 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 TS 100 392-3-8 [7], annex A. Call control signalling (EN 300 392-3-2 [3] and EN 300 392-3-3 [4]), LAPD framing (ETS 300 402-1 [10] and 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 EN 300 392-3-1 V1.3.1:2010
ETSI ETSI EN 300 392-3-1 V1.3.1 (2010-08)16 NOTE 1: When the individual subscriber is registered in his home SwMI, this SwMI also performs the MM functions related to the I-VDB, but in such a case except possibly for the de-registration operation, the whole MM functionality for that subscriber is supported within one single SwMI and therefore is outside the scope of ISI standardization. Regarding the de-registration operation, it will take place over the ISI in the specific case where the subscriber was previously registered in a visited SwMI and has migrated back to his home SwMI (see clause 6.1.1.3 about individual subscriber migration): but even in this case there is no need to define other SwMI roles than the two defined above (home SwMI and visited SwMI). - group attached SwMI: this SwMI performs the group MM functions related to the Group Visitor DataBase
(G-VDB). By definition its MNI is different from the extended part of the TSI of the group (subscriber) (since this SwMI is different from the group home SwMI). NOTE 2: Generally individual subscribers will be attached to the group in the group home SwMI (actually one might expect that most of them will); this SwMI will then also perform the MM functions related to the G-VDB, but in such a case except possibly for the detachment operation of group attached SwMIs, the whole MM functionality for that subscriber is supported within one single SwMI and therefore is outside the scope of ISI standardization. Regarding the detachment operation of a group attached SwMI, it will take place over the ISI in the specific case where all individual subscribers member of the group previously registered in that SwMI have migrated away from it (see clause 6.1.1.3 about individual subscriber migration): but even in this case there is no need to define other SwMI roles than those of home SwMI and group attached SwMI defined above. NOTE 3: Since the home SwMI of individual subscribers members of a group may be different from the home SwMI of that group, the group attached SwMIs for that group will not necessarily be visited SwMIs of the members of that group - but may also be their home SwMIs. 6.1.1.2 SwMI databases In order to support the individual subscriber and group MM functionality in the SwMIs, the following database is defined: • the HDB comprises information about the individual and/or group subscribers. It is located in the subscriber's home SwMI. The HDB is divided into Individual HDB (I-HDB) and Group HDB (G-HDB): - I-HDB contains the location tracking amongst SwMIs, i.e. in which SwMI is an individual subscriber currently located. In addition, the I-HDB is able to provide the basic and optionally the supplementary service migration profiles of the individual subscriber at migration; - G-HDB contains the group attachment tracking amongst SwMIs, i.e. which SwMIs are group attached. In addition, the G-HDB is able to provide the basic and optionally the supplementary service migration profiles of the group (subscriber) at group attachment; • the VDB comprises temporary information about individual and/or group subscribers. For a given individual subscriber member of one or more groups, it is located in the SwMI where that subscriber is registered (be it his home SwMI or a visited SwMI). The VDB is divided into Individual VDB (I-VDB) and Group VDB
(G-VDB): - I-VDB contains the Individual TETRA Subscriber Identity (ITSI) and Visiting Short Subscriber Alias Identity ((V)ASSI) association and the location tracking for the individu
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...