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Bug #4954

closed

Fix routing of RADIO-STATUS by TMSI

Added by laforge about 2 years ago. Updated about 2 years ago.

Status:
Resolved
Priority:
High
Assignee:
Target version:
-
Start date:
01/17/2021
Due date:
% Done:

100%

Spec Reference:

Description

While development of test cases (specifically TC_radio_status_tmsi) it has shown that routing the uplink RADIO-STATUS by TMSI is broken. osmo-gbproxy consistently selects a "wrong" SGSN.

The expectation is that we treat the TMSI identical to a TLLI and extract the NRI value from that. However, that somehow fails as the TMSI upper bits are not well-defined and could indicate an unexpected TLLI type. In my examples, it's tMSI_Value := '42180023'O, whihc contains NRI=3 and hence is expected to end up on SGSN0. However, it gets routed to SGSN1 in all test invocations.


Related issues

Related to osmo-gbproxy - Feature #4472: Intra-domain connection of OsmoGBPROXY to multiple SGSNs (pooling)Resolveddaniel03/29/2020

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