13 List of system parameters

3GPP43.068Release 17Stage 2TSVoice Group Call Service (VGCS)

13.1 Timers

13.1.1 Txx

This is a supervision timer on the anchor MSC for the setup of the voice group call. It is started on receipt of a SETUP message from the calling subscriber when the calling subscriber is in the anchor MSC area and on receipt of an ISUP IAM from the relay MSC when the calling subscriber is in the relay MSC area. Refer to subclause 11.3.1.1.2 for procedures on expiry.

The value of timer Txx is operator specific.

13.1.2 T1

In a network supporting talker priorities or uplink access option (i) as defined in subclause 7.2, the uplink busy message on the FACCH of the voice group call channel downlink is repeated by the BSS every T1 seconds (see subclause 11.3.7.1).

The value of timer T1 is operator specific. Its default value is 5 seconds.

13.1.3 T2

In a network supporting the transmission of additional subscriber-related information, the additional info message on the SACCH of the voice group call channel downlink is repeated by the BSS every T2 seconds, until the current talker releases the uplink or is released by the network (see subclause 11.3.7.1).

The value of timer T2 is operator specific. Its default value is 5 seconds.

13.1.4 Tbb

In a network supporting validation of Priority Uplink Requests, the timer Tbb supervises the broadcast of a new token (Y) after a valid Priority Uplink Request has been received.

If a Priority Uplink Request is received, and the token matches the token in the BSS (X) then the request is accepted, token X is invalidated and Tbb is started. On Tbb expiry a new token (Y), and the priority of the accepted request, is sent in the uplink busy message on the FACCH of the voice group call channels. The Tbb timer should be set to a value that allows other service subscribers who sent a Priority Uplink Request with token X, at the same time as the one accepted by the network, to be back on the voice group call channel in order to receive the new token (Y).

The default value for Tbb is 500ms..

13.1.5 Ttv

In a network supporting validation of Priority Uplink Requests, the timer Ttv supervises an additional validity period for an unused token (A). When T1 (supervising the periodic uplink busy) expires a new token (B) is sent in the uplink busy message on the FACCH of the voice group call channels and timer Ttv is started. If a Priority Uplink Request is received before Ttv expires and the token matches either token in the BSS (A or B), the request is considered to be valid, both tokens (A and B) in the BSS are invalidated and Ttv is stopped. If Ttv expires (i.e. no valid Priority Uplink Request has been received within Ttv seconds) the unused token (A) is invalidated.

The value of timer Ttv is operator specific. The value chosen should allow for the reception of requests from service subscribers who have left the group call channel before receipt of the UPLINK_BUSY with new token (B). Its default value is 1s.

13.1.6 Tast

In a network supporting A-interface link sharing timer Tast shall be used to measure the duration between periodic reports from the BSC to the MSC of Group Call Area cells for which channels have been assigned or released, pre-empted or failed since the last periodic report. When timer Tast expires, if new cells in the Group Call Area have been established or existing ones have been released, pre-empted or failed, the MSC shall be informed of the changes (see subclause 7.1b). If no changes have occurred nothing shall be sent. Timer Tast shall be restarted to measure the period of time until the next report. The timer shall be stopped when the call is released.

The value of timer Tast is operator specific. Its default value is 5 seconds.

13.1.7 T3

In a RANflex configuration the group call serving MSC when receiving Send Group Call Info from the VMSC shall supervise the setup of the group call by timer T3. T3 is started when a positive Send Group Call Info result is returned to the VMSC and it is stopped when the group call is set up. At timeout the temporarily stored transient data are deleted from the GCR.

In a RANflex configuration with group call redundancy T3 shall be implemented in the GCR instead of in the MSC. T3 is started when initial talker information is stored and stopped when initial talker information is deleted. At timeout initial talker information is deleted from the GCR.

The value of timer T3 is operator specific. Its default value is 5 seconds.

Annex A (informative):
Change History

TSG#

TSG doc

WG doc

Spec

CR

Rev

Ph

Cat

Old vers

New vers

Title

WI

S#31

Feb 2000

03.68

8.0.0

Specification version upgrade to Release 1999 version 8.0.0

CN#7

email before SMG#32

Apr 2000

03.68

A017

R99

8.0.0

8.1.0

VGCS Signalling Flows

ASCI

CN#7

email before SMG#32

Apr 2000

03.68

A019

R99

8.0.0

8.1.0

Data Flow for Fast Call setup

ASCI

CN#7

email before SMG#32

Apr 2000

03.68

A022

R99

8.0.0

8.1.0

Recommendation to use DTMF tones for VGCS talking subscriber downlink un-muting

ASCI

S#32CN#8

NP-000275

N1-000738

03.68

A024

R99

F

8.1.0

8.2.0

Call Release clarification at the Relay MSC

ASCI

S#32CN#8

NP-000275

N1-000739

03.68

A025

R99

F

8.1.0

8.2.0

Speech transmission architecture clarification

ASCI

S#32CN#8

NP-000275

N1-000740

03.68

A026

R99

D

8.1.0

8.2.0

Clarification of anchor MSC address format

ASCI

S#32CN#8

NP-000276

N1-000676

03.68

A023

R4

B

8.2.0

9.0.0

Introduction of Originator-to-dispatcher information into VGCS

ASCI

S#32CN#8

NP-000276

N1-000767

03.68

A027

R4

F

8.2.0

9.0.0

VGCS service accessibility

ASCI

S#32CN#8

NP-000276

N1-000769

03.68

A028

R4

C

8.2.0

9.0.0

talker outside Group Call Area

ASCI

S#32CN#8

NP-000276

N1-000771

03.68

A029

R4

F

8.2.0

9.0.0

Notification response & uplink reply procedure definition

ASCI

S#32CN#8

NP-000276

N1-000773

03.68

A030

R4

F

8.2.0

9.0.0

Release dataFlow correction

ASCI

03.68 / 43.068

03.68 v9.0.0

43.068 v4.0.0

Conversion to 3GPP TS format

CN#9

NP-000449

N1-000873

43.068

001

R4

F

4.0.0

4.1.0

Uplink Release dataFlow correction

ASCI

CN#9

NP-000449

N1-000915

43.068

002

R4

F

4.0.0

4.1.0

Correction in the Notification procedure

ASCI

CN#9

NP-000449

N1-000918

43.068

003

R4

B

4.0.0

4.1.0

Identification of Group ID – The longest GID has to be matched

ASCI

Oct 2000

4.1.0

4.1.1

GSM references revert to pre-Release-4 spec number format.

NP-10

NP-000667

N1-001171

43.068

004

Rel-4

F

4.1.1

4.2.0

Call Waiting is not applicable to an originator/talker in dedicated mode

ASCI

NP-10

NP-000667

N1-001181

43.068

005

REL-4

F

4.1.1

4.2.0

Wrong Field Name for OTDI

ASCI

NP-10

NP-000667

N1-001401

43.068

006

1

REL-4

F

4.1.1

4.2.0

DTMF precision

ASCI

43.068

Rel-4

4.2.0

4.2.1

ETSI/MCC cleanup on references and editorials (version 4.2.1 was never issued in 2000-12, but 4.2.0 was the correct from the DBase).

05.05.

2002

NP-16

43.068

Rel-5

4.2.1

5.0.0

CN plenary decision to make this TS also for Release 5.

June 2002

43.068

Rel-5

5.0.0

5.0.1

Editorial correction, changing Note 1 to 15 and Note 2 to 16 in fig. 7, subclause 11.3.8.

27.06.

2002

NP-17

NP-020383

N1-021687

43.068

007

Rel-5

F

5.0.1

5.1.0

ASCI VGCS call termination by dispatchers using DTMF

Sept 2002

NP-18

NP-020675

43.068

008

4

Rel-5

F

5.1.0

5.2.0

MS late entry notification

Dec 2002

NP-21

NP-030408

N1-031204

43.068

010

1

Rel-5

A

5.2.0

5.3.0

Correction of uplink release management

Sept 2003

NP-21

NP-030407

N1-031210

43.068

012

1

Rel-5

A

5.2.0

5.3.0

Correction to definition of Group-ID, Group call area ID and Group Call Reference

Sept 2003

NP-21

NP-030409

N1-031217

43.068

013

1

Rel-5

F

5.2.0

5.3.0

Correction to MS Late Entry description

Sept 2003

NP-21

NP-030410

N1-031332

43.068

014

2

Rel-6

F

5.3.0

6.0.0

Dispatcher signalled mute/unmute of talkers downlink and correction and update of incorrect implementation of CR 03.68 A022

Sept 2003

NP-24

NP-040203

N1-041073

43.068

016

1

Rel-6

F

6.0.0

6.1.0

Correction of PCH re-organization notification

June 2004

NP-25

NP-040373

N1-041527

43.068

019

1

Rel-6

A

6.1.0

6.2.0

Correction on notification for first talker of VGCS call

Sept 2004

NP-25

NP-040329

N1-041547

43.068

020

1

Rel-6

B

6.1.0

6.2.0

Introduction of USIM based ciphering for VGCS

Sept 2004

NP-26

NP-040515

N1-042061

43.068

021

1

Rel-6

C

6.2.0

6.3.0

Addition of VGCS reconfiguration procedure

Dec 2004

NP-26

NP-040515

N1-042075

43.068

022

2

Rel-6

F

6.2.0

6.3.0

Group Call Reference handling by the MSC during VGCS call establishment

Dec 2004

NP-26

NP-040515

N1-041768

43.068

023

 

Rel-6

D

6.2.0

6.3.0

Notification Response procedure

Dec 2004

NP-26

NP-040515

N1-041769

43.068

024

 

Rel-6

D

6.2.0

6.3.0

Clarification on Immediate Setup procedure

Dec 2004

NP-26

NP-040515

N1-041803

43.068

027

 

Rel-6

B

6.2.0

6.3.0

USIM based ciphering on dedicated channels

Dec 2004

NP-27

NP-050067

N1-050043

43.068

031

Rel-6

A

6.3.0

6.4.0

Correction of the conditions for establishment of a voice group call

March 2005

NP-27

NP-050076

N1-050281

43.068

036

1

Rel-6

F

6.3.0

6.4.0

EPRT Inter-PLMN Group Call notification for dispatchers

March 2005

CP-28

CP-050057

C1-050469

43.068

041

Rel-6

A

6.4.0

6.5.0

Correction on the use of calling subscriber and destination subscriber

June 2005

CP-28

CP-050073

C1-050722

43.068

028

3

Rel-7

B

6.5.0

7.0.0

Support of talker priorities and talker identity presentation

June 2005

CP-28

CP-050073

C1-050742

43.068

043

2

Rel-7

B

6.5.0

7.0.0

VGCS Broadcast Point in the BSS

June 2005

CP-29

CP-050361

C1-051117

43.068

047

1

Rel-7

A

7.0.0

7.1.0

Error correction

Sept 2005

CP-29

CP-050361

C1-050903

43.068

051

 

Rel-7

A

7.0.0

7.1.0

Correction of USIM based ciphering on dedicated channels

Sept 2005

CP-29

CP-050365

C1-051112

43.068

048

2

Rel-7

B

7.0.0

7.1.0

EFR for VGCS

Sept 2005

CP-29

CP-050365

C1-050901

43.068

049

 

Rel-7

B

7.0.0

7.1.0

Delivery of information about the subsequent talker to the previous talker

Sept 2005

CP-29

CP-050365

C1-051118

43.068

054

1

Rel-7

F

7.0.0

7.1.0

Correction on the uplink transmission management

Sept 2005

CP-29

CP-050365

C1-050945

43.068

055

 

Rel-7

F

7.0.0

7.1.0

Enhancement on the dedicated channel Assignment procedure

Sept 2005

CP-29

CP-050365

C1-051120

43.068

058

1

Rel-7

B

7.0.0

7.1.0

Delivery of short message to voice group call

Sept 2005

CP-30

CP-050549

C1-051580

43.068

060

1

Rel-7

B

7.1.0

7.2.0

VGCS A-interface link sharing

Dec 2005

CP-30

CP-050549

C1-051583

43.068

063

1

Rel-7

B

7.1.0

7.2.0

AMR for VGCS

Dec 2005

CP-30

CP-050549

C1-051692

43.068

059

2

Rel-7

B

7.1.0

7.2.0

Talker priority: Priority Uplink Request validation mechanism

Dec 2005

CP-30

CP-050549

C1-051693

43.068

064

3

Rel-7

B

7.1.0

7.2.0

Point to point short message during an ongoing voice group call

Dec 2005

CP-30

CP-050549

C1-051449

43.068

068

 

Rel-7

D

7.1.0

7.2.0

Editorial corrections

Dec 2005

CP-31

CP-060123

C1-060243

43.068

0069

1

Rel-7

F

7.2.0

7.3.0

Data confidentiality for p-t-p SMS in an active voice group call

March 2006

CP-31

CP-060122

C1-060058

43.068

0070

Rel-7

B

7.2.0

7.3.0

Clarification of prefix for an SMS to an active voice group call

March 2006

CP-31

CP-060122

C1-060108

43.068

0071

1

Rel-7

B

7.2.0

7.3.0

Enhanced support of AMR for VGCS

March 2006

CP-31

CP-060113

C1-060496

43.068

0073

2

Rel-7

A

7.2.0

7.3.0

Correction of muting/un-muting procedure

March 2006

CP-31

CP-060122

C1-060242

43.068

0074

Rel-7

B

7.2.0

7.3.0

Correction of the distribution of emergency indications

March 2006

CP-31

CP-060122

C1-060545

43.068

0076

1

Rel-7

C

7.2.0

7.3.0

Modification of conditions for VGCS call establishment

March 2006

CP-31

CP-060122

C1-060547

43.068

0078

1

Rel-7

F

7.2.0

7.3.0

Addition to group call SM procedures

March 2006

CP-31

CP-060122

C1-060549

43.068

0080

1

Rel-7

F

7.2.0

7.3.0

EPRT – Corrections and clarifications to the procedures for releasing the calling service subscribers dedicated connection to the anchor MSC

March 2006

CP-31

CP-060122

C1-060550

43.068

0081

1

Rel-7

F

7.2.0

7.3.0

EPRT – Correction/ clarification of voice group call termination procedures

March 2006

CP-31

CP-060122

C1-060570

43.068

0082

2

Rel-7

F

7.2.0

7.3.0

Clarification of the no activity time

March 2006

CP-31

CP-060122

C1-060566

43.068

0083

2

Rel-7

B

7.2.0

7.3.0

Indication of the channel to be used for uplink requests

March 2006

43.068

Rel-7

7.3.0

7.3.1

SDL source files updated

April 2006

CP-32

CP-060273

C1-061101

43.068

0075

2

Rel-7

B

7.3.1

7.4.0

Addition of interoperability with RANflex

June 2006

CP-32

CP-060272

C1-061103

43.068

0084

2

Rel-7

C

7.3.1

7.4.0

Optimized delivery of the additional information

June 2006

CP-32

CP-060272

C1-060728

43.068

0085

 

Rel-7

F

7.3.1

7.4.0

EPRT: Add signalling flow for a dispatcher originated VGCS

June 2006

CP-32

CP-060272

C1-061100

43.068

0086

1

Rel-7

F

7.3.1

7.4.0

Group Call Re-establishment by the BSS

June 2006

CP-32

CP-060276

C1-060982

43.068

0088

1

Rel-7

F

7.3.1

7.4.0

TC-RT Clarification on use of the Uplink Reply Procedure

June 2006

CP-32

CP-060272

C1-060983

43.068

0089

1

Rel-7

B

7.3.1

7.4.0

Talker priority and A-interface link sharing interaction

June 2006

CP-32

CP-060276

C1-060861

43.068

0094

 

Rel-7

F

7.3.1

7.4.0

Correction of Figure 6

June 2006

CP-32

CP-060272

C1-060862

43.068

0095

 

Rel-7

F

7.3.1

7.4.0

Correction of Figure 6a

June 2006

CP-33

CP-060464

C1-061910

43.068

0097

Rel-7

7.4.0

7.5.0

Failure cases during VGCS call establishment

Sept 2006

CP-33

CP-060464

C1-061503

43.068

0098

Rel-7

7.4.0

7.5.0

Common AMR configurations for VGCS and VBS

Sept 2006

CP-33

CP-060464

C1-061819

43.068

0100

Rel-7

7.4.0

7.5.0

EVGCS-Remove the limitation of speech version in A interface sharing

Sept 2006

CP-33

CP-060464

C1-061556

43.068

0103

Rel-7

7.4.0

7.5.0

Indicate the originating relay MSC address to anchor MSC

Sept 2006

CP-33

CP-060464

C1-061908

43.068

0105

Rel-7

7.4.0

7.5.0

Extension of Group ID

Sept 2006

CP-33

CP-060464

C1-061916

43.068

0110

Rel-7

7.4.0

7.5.0

Correction for radio resource assignment

Sept 2006

CP-33

CP-060470

C1-061816

43.068

0096

Rel-7

7.4.0

7.5.0

Corrections to interoperability with RANflex

Sept 2006

CP-34

CP-060664

C1-062423

43.068

0117

1

Rel-7

7.5.0

7.6.0

Emergency set/reset alert to dispatchers

Dec 2006

CP-34

CP-060664

C1-062420

43.068

0112

2

Rel-7

7.5.0

7.6.0

Corrections to SMS procedures during ongoing voice group call

Dec 2006

CP-34

CP-060664

C1-062424

43.068

0119

1

Rel-7

7.5.0

7.6.0

Optimized channel allocation of the calling subscriber

Dec 2006

CP-34

CP-060664

C1-062422

43.068

0116

1

Rel-7

7.5.0

7.6.0

Clarifications to the case when a group ID with 8 digits is used

Dec 2006

CP-34

CP-060665

C1-062111

43.068

0114

Rel-7

7.5.0

7.6.0

Condition for the inclusion of parameters in the GCR interrogation message

Dec 2006

CP-34

CP-060665

C1-062113

43.068

0115

Rel-7

7.5.0

7.6.0

Addition of Teleservice Code to SendGroupCallInfo

Dec 2006

CP-34

CP-060672

C1-062509

43.068

0118

1

Rel-8

7.6.0

8.0.0

Introduction of sending application-specific data to group call members

Dec 2006

CP-36

CP-070371

C1-070684

43.068

0133

Rel-8

A

8.0.0

8.1.0

TCRT: Definition of BSSAP procedure for release of VGCS call controlling connections

June 2007

CP-36

CP-070376

C1-070973

43.068

0132

1

Rel-8

A

8.0.0

8.1.0

TCRT: Silent (re-)joining dipatcher, immediately talking dispatcher

June 2007

CP-36

CP-070376

C1-070975

43.068

0130

2

Rel-8

A

8.0.0

8.1.0

Retry of the VGCS Assignment procedure

June 2007

CP-36

CP-070387

C1-070686

43.068

0135

Rel-8

A

8.0.0

8.1.0

Correction of condition for cell specific speech version

June 2007

CP-36

CP-070387

C1-070685

43.068

0134

Rel-8

A

8.0.0

8.1.0

Alignment of SDLs with condition for successful call setup

June 2007

CP-36

CP-070394

C1-071380

43.068

0140

3

Rel-8

B

8.0.0

8.1.0

TCRT: Distribution of time-critical application data by BSC to its broadcast area

June 2007

CP-36

CP-070394

C1-071374

43.068

0138

3

Rel-8

C

8.0.0

8.1.0

Talker channel parameter

June 2007

CP-36

CP-070394

C1-070755

43.068

0136

Rel-8

D

8.0.0

8.1.0

Correction of place of message flows for EVA

June 2007

CP-37

CP-070602

C1-072114

43.068

0142

2

Rel-8

F

8.1.0

8.2.0

Correction to the talker channel parameter

Sept 2007

CP-37

CP-070604

C1-071620

43.068

0141

 

Rel-8

F

8.1.0

8.2.0

TCRT: Correction to process VGCS_Handling_Relay_MSC

Sept 2007

CP-38

CP-070793

C1-072829

43.068

0143

 

Rel-8

F

8.2.0

8.3.0

TCRT: Removal of the support of long application-specific data

Dec 2007

CP-38

CP-070815

C1-072830

43.068

0144

 

Rel-8

F

8.2.0

8.3.0

TCRT: Paging for incoming p-t-p transaction to service subscriber in an ongoing group call

Dec 2007

CP-39

CP-080136

C1-080453

43.068

0148

1

Rel-8

C

8.3.0

8.4.0

TCRT: Warning tone for call termination due to time out of voice inactivity time

March 2008

CP-39

CP-080129

C1-080452

43.068

0147

1

Rel-8

F

8.3.0

8.4.0

TCRT: Clarification of the channel to be used for uplink access

March 2008

CP-39

CP-080123

C1-080536

43.068

0146

1

Rel-8

A

8.3.0

8.4.0

TCRT: Clean up of the requirement of sending SMS to non established group calls

March 2008

CP-40

CP-080351

C1-081646

43.068

0149

Rel-8

B

8.4.0

8.5.0

TCRT: Closing some open issues concerning the transmission of application-specific data

June 2008

CP-40

CP-080361

C1-081648

43.068

0150

Rel-8

F

8.4.0

8.5.0

TCRT: Clarification of conditions for start and stop of voice inactivity timer

June 2008

CP-46

Rel-9

8.5.0

9.0.0

Upgrade to Rel-9

Dec 2009

CP-47

CP-100135

C1-100476

43.068

0151

Rel-9

C

9.0.0

9.1.0

TCRT: Uplink reply procedure

March 2010

CP-49

CP-100501

C1-102316

43.068

0152

Rel-9

F

9.1.0

9.2.0

TC-RT: Use of application data for group calls involving more than one PLMN

September 2010

CP-50

CP-100763

C1-104237

43.068

0153

1

Rel-10

B

9.2.0

10.0.0

TC-RT: Introduction of group IDs with prefix

December 2010

CP-54

CP-110882

C1-114666

43.068

0154

Rel-11

F

10.0.0

11.0.0

TC-RT: Initial Talker Information handling (solving race conditions)

December 2011

CP-54

CP-110882

C1-114668

43.068

0155

Rel-11

F

10.0.0

11.0.0

TC-RT: GCR Transient Data

December 2011

CP-55

CP-120121

C1-120521

43.068

0156

1

Rel-11

B

11.0.0

11.1.0

TC-RT: Group Call Redundancy

March 2012

CP-55

CP-120099

C1-120626

43.068

0161

1

Rel-11

A

11.0.0

11.1.0

TC-RT: Additional Calling Party Number

March 2012

CP-55

43.068

Rel-11

11.1.0

11.1.1

Minor editorial fixes

March 2012

CP-56

CP-120319

C1-121128

43.068

0162

Rel-11

F

11.1.1

11.2.0

Cleanup corrections to group call redundancy

June 2012

CP-56

CP-120319

C1-121774

43.068

0163

Rel-11

B

11.1.1

11.2.0

TC-RT: VGCSflex – interoperability with pre-Rel-7 relay MSCs

June 2012

CP-56

CP-120319

C1-121775

43.068

0164

Rel-11

B

11.1.1

11.2.0

TC-RT: Correction of subscription check for VGCSflex

June 2012

CP-57

CP-120596

C1-122634

43.068

0165

Rel-11

F

11.2.0

11.3.0

TC-RT: Corrections to group call redundancy

Sept 2012

CP-57

CP-120584

C1-122636

43.068

0166

Rel-11

F

11.2.0

11.3.0

TC-RT: Cleanup of editorial or textual defects

Sept 2012

CP-58

CP-120808

C1-124498

43.068

0167

Rel-11

F

11.3.0

11.4.0

TC-RT: Additional Calling Party Number

Dec 2012

CP-65

Rel-12

11.4.0

12.0.0

Upgrade to Rel-12

Sept 2014

CP-68

CP-150329

C1-151874

43.068

0168

Rel-13

12.0.0

13.0.0

RT – explicit signaling mute/unmute for VGCS

June 2015

CP-70

CP-150688

C1-153591

43.068

0170

Rel-13

A

13.0.0

13.1.0

RT : Voice Group Call services with AoIP

Dec 2015

Change history

Date

Meeting

TDoc

CR

Rev

Cat

Subject/Comment

New version

2017-03

SA#75

Upgrade to Rel-14

14.0.0

2018-06

SA#80

Update to Rel-15 version (MCC)

15.0.0

2020-07

SA#88e

Update to Rel-16 version (MCC)

16.0.0

2022-04

SA-95e

Update to Rel-17 version (MCC)

17.0.0