ETSI TS 143 068 V9.0.0 (2010-01)

Digital cellular telecommunications system (Phase 2+); Voice Group Call Service (VGCS); Stage 2 (3GPP TS 43.068 version 9.0.0 Release 9)

RTS/TSGC-0143068v900

General Information

• Status: Published
• Publication Date: 12-Jan-2010
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Completion
• Due Date: 28-Dec-2009
• Completion Date: 13-Jan-2010

Standards Content (Sample)

ETSI TS 143 068 V9.0.0 (2010-01)
Technical Specification


Digital cellular telecommunications system (Phase 2+);
Voice Group Call Service (VGCS);
Stage 2
(3GPP TS 43.068 version 9.0.0 Release 9)


R
GLOBAL SYSTEM FOR
MOBILE COMMUNICATIONS

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3GPP TS 43.068 version 9.0.0 Release 9 1 ETSI TS 143 068 V9.0.0 (2010-01)



Reference
RTS/TSGC-0143068v900
Keywords
GSM
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ETSI

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3GPP TS 43.068 version 9.0.0 Release 9 2 ETSI TS 143 068 V9.0.0 (2010-01)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
http://webapp.etsi.org/key/queryform.asp.
ETSI

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3GPP TS 43.068 version 9.0.0 Release 9 3 ETSI TS 143 068 V9.0.0 (2010-01)
Contents
Intellectual Property Rights . 2
Foreword . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions and abbreviations . 8
3.1 Definitions . 8
3.2 Abbreviations . 9
4 Main concepts . 9
4.1 Group definition . 9
4.2 Group conversations . 9
4.2.1 Group call initiation . 9
4.2.1.1 Normal operation with successful outcome . 9
4.2.1.2 Exceptional procedures . 11
4.2.2 On-going group calls . 11
4.2.2.1 Normal operation with successful outcome . 11
4.2.2.2 Exceptional procedures . 14
4.2.3 Leaving of a group call without termination . 14
4.2.4 Group call termination . 14
4.2.5 Acknowledgements . 15
4.2.6 Transactions between the mobile station and the network . 15
4.2.7 Processing of originator-to-dispatcher information . 15
4.2.8 Transfer of application-specific data to group call members . 15
4.2.8.1 General . 15
4.2.8.2 Sending of application-specific data . 16
4.2.8.2.1 By the talking service subscriber . 16
4.2.8.2.2 By a listener . 16
4.2.8.3 Sending a confirmation of receipt of application-specific data . 17
4.2.8.4 Distributing application-specific data to a voice group call . 17
4.2.8.4.1 Distribution via the MSC . 17
4.2.8.4.2 Immediate distribution by the BSC . 18
5 General architecture . 18
5.1 Group Call Register (GCR) . 18
5.2 Voice group call responsibility . 19
6 Compatibility issues . 19
7 Transmission . 20
7.1 Transmission architecture . 20
7.1a Transmission architecture – A interface circuit sharing . 20
7.1a.1 Transmission architecture – General . 20
7.1a.2 Transmission architecture – Control Plane . 20
7.1a.3 Transmission architecture – User Plane . 20
7.1b Transmission architecture – A interface link sharing . 21
7.1b.1 Transmission architecture – General . 21
7.1b.2 Transmission architecture – Control Plane . 21
7.1b.3 Transmission architecture – User Plane . 22
7.2 Radio channels . 22
7.3 Data confidentiality . 23
8 Information storage . 25
8.1 Information stored in the GCR . 25
8.1.1 Information used for routing of service subscriber originated voice group calls . 25
8.1.2 Group call attributes. 25
ETSI

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3GPP TS 43.068 version 9.0.0 Release 9 4 ETSI TS 143 068 V9.0.0 (2010-01)
8.1.2.1 Group call area . 26
8.1.2.2 Dispatcher identities . 26
8.1.2.3 No activity time . 26
8.1.2.4 Priorities . 27
8.1.3 Transient GCR Data. 27
8.2 Information managed per subscriber . 27
8.2.1 Stored in the HLR . 27
8.2.2 Stored in the VLR . 28
8.2.3 Stored in the SIM . 28
8.2.3a Stored in the USIM . 28
8.3 Information used for routing of dispatcher originated voice group calls . 28
9 Identities . 28
9.1 Elementary identities for group calls . 28
9.2 Use of identities in the network . 29
10 Operation and maintenance aspects . . 31
11 Function and information flows . 31
11.1 Group management . 31
11.2 Group membership management . 31
11.3 Call management . 32
11.3.1 Call establishment . 32
11.3.1.1 Service subscriber call establishment . 32
11.3.1.1.1 Initial stage . 32
11.3.1.1.2 Establishment of the transmission means . 33
11.3.1.1.3 Release of the dedicated transmission means of the calling service subscriber. 34
11.3.1.1.4 Release of the dedicated transmission means of mobile stations responding to a notification . 35
11.3.1.1.5 void . 35
11.3.1.1.6 void . 35
11.3.1.2 Dispatcher call establishment . 35
11.3.1.3 Notification procedures . 35
11.3.1.4 Destination service subscribers . 38
11.3.1.5 Destination dispatchers . 38
11.3.2 Call release. 38
11.3.2.1 Call termination by the calling subscriber . 38
11.3.2.2 Call termination by dispatchers . 38
11.3.2.3 Call termination on expiry of no activity timer . 39
11.3.3 Leaving of a dispatcher . 39
11.3.4 Leaving and returning to a voice group call. 39
11.3.5 Cell change . 39
11.3.5.1 Listening subscriber . 39
11.3.5.2 Talking subscriber . 39
11.3.5.3 Dispatcher . 40
11.3.6 New calls . 40
11.3.7 Uplink and Downlink management . 40
11.3.7.1 Uplink transmission management . 40
11.3.7.1a Transfer of a talking service subscriber to a dedicated connection . 42
11.3.7.1b Release of the dedicated transmission means of a talking service subscriber . 42
11.3.7.2 Mute/Unmute downlink of the talker . 42
11.3.7a Signalling procedures for the user plane . 47
11.3.7a.1 Group call re-establishment by the BSS . 47
11.3.8 Overview of signalling . 47
11.3.9 Short Message Service (SMS) . 110
11.3.9.1 Delivering SMS to the voice group call . 110
11.3.9.2 Point-to-point short message during an ongoing voice group call . 112
11.4 Functional requirement of Anchor MSC . 113
11.5 Functional requirement of Relay MSC . 124
11.5A Functional requirement of group call serving MSC (within a RANflex pool) . 135
11.5B Functional requirement of VMSC (within a RANflex pool) . 137
11.6 Functional requirement of GCR . 141
11.7 Functional requirement of VLR . 144
ETSI

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3GPP TS 43.068 version 9.0.0 Release 9 5 ETSI TS 143 068 V9.0.0 (2010-01)
12 Content of messages . 148
12.1 Messages on the B-interface (MSC-VLR) . 148
12.1.1 Allocate Group Call Number . 148
12.1.2 Allocate Group Call Number ack . 149
12.1.3 Allocate Group Call Number negative response . 149
12.1.4 Release Group Call Number . 149
12.1.5 Send Group Call Info . 149
12.1.6 Send Group Call Info ack . 149
12.1.7 Send Group Call Info negative response . 150
12.2 Messages on the E-interface (MSC-MSC) . 150
12.2.1 Prepare Group Call . 150
12.2.2 Prepare Group Call ack . 150
12.2.3 Prepare Group Call negative response . 150
12.2.4 Send Group Call End Signal . 151
12.2.5 Forward Group Call Signalling . 152
12.2.6 Process Group Call Signalling . 152
12.2.7 MT Forward Short Message for VGCS Request . 153
12.2.8 MT Forward Short Message for VGCS Response . 153
12.2.9 Send Group Call Info . 154
12.2.10 Send Group Call Info ack . 154
12.2.11 Send Group Call Info negative response . 155
12.3 Messages on the I-interface (MSC-GCR) . 155
12.3.1 GCR Interrogation . 155
12.3.2 GCR Interrogation ack . 157
12.3.3 GCR interrogation negative response . 157
12.3.4 Call released. 158
12.3.5 GCR SMS Interrogation . 158
12.3.6 GCR SMS Interrogation Response . 158
13 List of system parameters . 158
13.1 Timers . 158
13.1.1 Txx . 158
13.1.2 T1 . 158
13.1.3 T2 . 159
13.1.4 Tbb . 159
13.1.5 Ttv . 159
13.1.6 Tast . 159
13.1.7 T3 . 159
Annex A (informative): Change History . 160
History . 164

ETSI

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3GPP TS 43.068 version 9.0.0 Release 9 6 ETSI TS 143 068 V9.0.0 (2010-01)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.

ETSI

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3GPP TS 43.068 version 9.0.0 Release 9 7 ETSI TS 143 068 V9.0.0 (2010-01)
1 Scope
The present document specifies the stage two description of the Voice Group Call Service (VGCS) which allows speech
conversation of a predefined group of service subscribers in half duplex mode on the radio link taking into account
multiple subscribers involved in the group call per cell.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] Void.
[1a] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 42.068: "Voice Group Call Service (VGCS); Stage 1".
[3] 3GPP TS 43.022: "Functions related to Mobile Station (MS) in idle mode".
[4] 3GPP TS 23.067: "enhanced Multi-Level Precedence and Pre-emption service (eMLPP); Stage 2".
[5] 3GPP TS 44.018: "Mobile radio interface layer 3 specification; Radio Resource Control Protocol".
[6] 3GPP TS 45.008: "Radio subsystem link con
...