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Feature #1914

closed

Implement Early Classmark sending

Added by laforge over 7 years ago. Updated about 7 years ago.

Status:
Closed
Priority:
High
Assignee:
Category:
-
Target version:
-
Start date:
01/12/2017
Due date:
% Done:

100%

Resolution:
Spec Reference:

Description

The feature is about implementing the sending of a Classmark change
message when "early classmark sending control(es_ind)" is allowed by the
BTS in the SI3 message.
I saw on the source code, the classmark change is already implemented
but sent only upon receive of a classmark inquiry message.

So what I want is an option (like in mobile.cfg) to allow the early
sending of a classmark change (I think this msg is sent after receiving
a L2 UA frame when there is a service request or paging request)

Why I need this :
When using osmocom-bb on specific commercial operator, the mobile
application just before calling goes into a loop of
AuthRequest/CipheringModeCommand like this :

Ciphering mode command - 1
Ciphering mode command - 2
.....
Ciphering mode command - 15

Ciphering Mode Complete - 1
Ciphering Mode Complete - 2
....
Ciphering Mode Complete - 15

funct=UI - 1
funct=UI - 2
...
funct=UI - 30

So the call is rejected immediately. I'm pretty sure it's because of the
none sending of the early classmark change even if it's not mandatory.

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