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Bug #2790

dynamic timeslots: failure when all TS are used as PDCH and the phone requests a TCH

Added by neels 4 months ago. Updated 18 days ago.

Status:
New
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
12/28/2017
Due date:
% Done:

0%

Spec Reference:

Description

If a phone requests a TCH channel from OsmoBTS, but all dyn timeslots are used as PDCH, the MS gets rejected completely. OsmoBTS should probably assign an SDCCH if no TCH are available, so that the MSC can then request a TCH from the BSC and trigger a change from PDCH to TCH.

There is a "paging any use tch (0|1)", so there could be a similar policy decision to assign an SDCCH instead of a TCH ... ?

As long as this is not fixed, it may be impossible for MS to dial numbers.


Related issues

Related to OsmoBSC - Feature #1606: hand-over for load distribution among BTSs In Progress 02/23/2016

History

#1 Updated by laforge 4 months ago

  • Assignee set to dexter

#2 Updated by laforge 4 months ago

#3 Updated by neels 3 months ago

Note that the handover code from jolly that I'm working on has changes in this direction, so it would make sense to talk about this before implementing, or also re-assign to me ... #1606

#4 Updated by neels 3 months ago

  • Related to Feature #1606: hand-over for load distribution among BTSs added

#5 Updated by laforge 18 days ago

I'm not sure if this is an issue anymore, it needs to be investigated (and possibly get a test case?). With the current code base we should always do late assignment, even if the MS requests a TCH in RACH...

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