6.6 Cross-phase compatibility
23.0903GPPRelease 17Stage 2TSUnstructured Supplementary Service Data (USSD)
If, when a Phase 2 MS sends a mobile initiated USSD request, any network entity is of Phase 1, the request will be rejected. If it is possible to encode the content of the USSD request using the Phase 1 protocol, the MS shall repeat the request, using the Phase 1 protocol.
A Mobile initiated USSD request from a Phase 1 MS uses the Phase 1 protocol. On receipt of such a request, the application shall also use the Phase 1 protocol when sending the response.
A Phase 2 network shall not send network initiated requests or notifications during a mobile initiated USSD request if the MS or any network entity involved in the operation is of Phase 1.
Annex A (informative):
Change history
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Change history |
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Date |
Meeting |
TDoc |
CR |
Rev |
Cat |
Subject/Comment |
New version |
|
|
Apr 1999 |
Transferred to 3GPP CN1 |
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|
CN#03 |
Approved at CN#03 |
3.0.0 |
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|
CN#06 |
001 |
1 |
USSD enhancement |
3.1.0 |
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CN#09 |
002 |
1 |
SDL refresh |
3.2.0 |
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|
CN#11 |
Release 4 after CN#11 |
4.0.0 |
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|
CN#16 |
Release 5 after CN#16 |
5.0.0 |
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|
CN#26 |
Release 6 after CN#26 |
6.0.0 |
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|
CT#30 |
0003 |
1 |
Incorrect References |
6.1.0 |
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|
CT#36 |
Upgraded unchanged from Rel-6 |
7.0.0 |
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|
CT#42 |
Upgraded unchanged from Rel-7 |
8.0.0 |
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|
CT#42 |
– |
– |
Update to Rel-9 version (MCC) |
9.0.0 |
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|
2011-03 |
– |
– |
Update to Rel-10 version (MCC) |
10.0.0 |
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|
2012-09 |
– |
– |
Update to Rel-11 version (MCC) |
11.0.0 |
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|
2014-09 |
– |
– |
Update to Rel-12 version (MCC) |
12.0.0 |
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|
2015-12 |
– |
– |
Update to Rel-13 version (MCC) |
13.0.0 |
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2017-03 |
– |
– |
Update to Rel-14 version (MCC) |
14.0.0 |
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|
2018-06 |
– |
– |
Update to Rel-15 version (MCC) |
15.0.0 |
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|
2020-07 |
– |
– |
Update to Rel-16 version (MCC) |
16.0.0 |
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|
2022-03 |
– |
– |
Update to Rel-17 version (MCC) |
17.0.0 |
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