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Bug #1979

closed

Priority of SAPI=0/SAPI=3 on SABM

Added by laforge about 7 years ago. Updated over 3 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
03/10/2017
Due date:
% Done:

100%

Spec Reference:

Description

In RT#1205sysmocom got a trace that showed a message flow like the following resulting in a re-transmission by the Mobile Station

MS                                             BTS
    - SABM SAPI=0, Paging Response ---->   
    <- SABM SAPI=3 ---------------------
    <- SABM ACK (UA?) for SAPI=0    ----
    - SABM SAPI=0, Paging Response ---->
</prE>

We need to investigate if we should start sending messages with SAPI=0 first or if there are other priority requirements that we need to consider.

Related issues

Related to libosmocore - Bug #4731: LAPDm does not implement SAPI priorities between data link layersStalledfixeria08/26/2020

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