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Bug #6099
closedImmediate Assignment on PCH without IMSI (check back behaviour)
Start date:
07/17/2023
Due date:
% Done:
100%
Spec Reference:
Description
It may happen that the PCU tries to perform an ImmediateAssignment even though it does not know the IMSI yet. At the moment osmo-bts rejects those ImmediateAssignment (PCUIF) requests since without an IMSI we can not properly calculate the paging group. However, since we discovered ImmediateAssignments without an IMSI in the wild we need to check back if we changed the behavior when moving from PCUIF v.10 to PCUIF v.11. And if necessary we should make sure that the behavior we had before the change is restored.
The specs seem not to be entirely clear about this, here are some references:
3gpp TS 44.018 3.5.3.1.2
3gpp TS 44.060 5.5.1.5
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