9 Operational Aspects
23.0533GPPRelease 17Service descriptionStage 2Tandem Free Operation (TFO)TS
TFO feature shall be defined so that a TFO capable TRAU should be able interact with a TFO non capable TRAU without noticeable degradation of quality. It shall be possible to roll-out TFO on part of the network.
The TFO establishment protocol shall define timers to set e.g. the negotiation message transmission time or the time needed to declare the loss of synchronisation (see clause 6.5.3). When setting the values of these timers it should be made sure that two sets of timers at both TRAUs are consistent in order to allow TFO establishment. Given that both TRAUs may be located in different PLMN and be manufactured by different companies, most of the timers will have to be initialised at pre-defined values.
Annex A (informative):
Change history
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SMG# |
SPEC |
CR |
PHASE |
VERS |
NEW_VERS |
SUBJECT |
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|
03.53 |
30 Sept 1996 |
0.0.0 |
Draft proposal |
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|
03.53 |
25 Nov 1996 |
0.0.0 |
Draft proposal after comments |
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|
03.53 |
27 Jan 1997 |
0.0.1 |
Version 0.0.0 has been presented to SMG3/WPA and joint SMG3/SMG11 in Dec. 96. No comments were made. Only change is editorial on official TS GSM reference |
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|
03.53 |
29 June 1997 |
0.0.2 |
Changes reflecting the last decisions in SMG11. |
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|
03.53 |
18 Aug 1997 |
0.1.0 |
Changes reflecting the decisions in SMG11 TFO #6 – format of the messages |
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|
03.53 |
01 Aug 1997 |
0.1.1 |
Changes reflecting the review in SMG11 TFO #8 in Bois D’Arcy – transparency of IPEs can be for 1 up to 8 bits |
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|
03.53 |
08 Oct 1997 |
0.2.0 |
Clarifications reflecting SMG11/TFO in Bois D’Arcy and SMG11 in Le Mans Incorporation of comments received by e-mail. Version for presentation to SMG3/SA |
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|
03.53 |
08 Nov 1997 |
0.3.0 |
Addition of some text regarding the main concept, handover management, UFE bit management, interaction with Supplementary services. |
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|
03.53 |
08 Dec 1997 |
1.0.0 |
Presented to SMG. The presented version was approved in SMG3/SA, but since it was not seen by SMG3, it was requested that it is presented again to SMG3, and was then only presented to SMG for information. |
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|
SMG# |
SPEC |
CR |
PHASE |
VERS |
NEW_VERS |
SUBJECT |
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|
S29 |
03.53 |
R98 |
7.0.0 |
Release 1998 version |
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|
S31 |
03.53 |
R99 |
8.0.0 |
Release 1999 version |
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Change history |
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|
Date |
TSG # |
TSG Doc. |
CR |
Rev |
Subject/Comment |
Old |
New |
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|
2001-03 |
11 |
SP-010098 |
001 |
1 |
Extension of TFO to AMR |
8.0.0 |
4.0.0 |
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|
2001-08 |
Clean-up |
4.0.0 |
4.0.1 |
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|
2002-06 |
16 |
Version for Release 5 |
4.0.1 |
5.0.0 |
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|
2004-12 |
26 |
Version for Release 6 |
5.0.0 |
6.0.0 |
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|
2007-06 |
36 |
Version for Release 7 |
6.0.0 |
7.0.0 |
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|
2008-12 |
42 |
Version for Release 8 |
7.0.0 |
8.0.0 |
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|
2009-12 |
46 |
Version for Release 9 |
8.0.0 |
9.0.0 |
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|
2011-03 |
51 |
Version for Release 10 |
9.0.0 |
10.0.0 |
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|
2012-09 |
57 |
Version for Release 11 |
10.0.0 |
11.0.0 |
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|
2014-09 |
65 |
Version for Release 12 |
11.0.0 |
12.0.0 |
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|
2015-12 |
70 |
Version for Release 13 |
12.0.0 |
13.0.0 |
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|
Change history |
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|
Date |
Meeting |
TDoc |
CR |
Rev |
Cat |
Subject/Comment |
New version |
|
2017-03 |
75 |
Version for Release 14 |
14.0.0 |
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|
2018-06 |
80 |
Version for Release 15 |
15.0.0 |
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|
2020-07 |
– |
– |
– |
– |
– |
Update to Rel-16 version (MCC) |
16.0.0 |
|
2022-04 |
– |
– |
– |
– |
– |
Update to Rel-17 version (MCC) |
17.0.0 |