Project

General

Profile

Actions

Bug #6378

open

Ericsson DUG 20 rejects SI2quater

Added by keith about 1 month ago. Updated about 1 month ago.

Status:
New
Priority:
Low
Assignee:
Category:
Ericsson BTS
Target version:
-
Start date:
02/28/2024
Due date:
% Done:

0%

Spec Reference:

Description

Sending SI2quater to the DUG20 results in

ERROR REPORT (cause=Radio Resource not available [ 21 01 80 ])

For what it may be worth, the SI and the error are in the attached pcap.

Maybe the BTS software version I have simply does not support it?


Files

si2q+error2.pcapng si2q+error2.pcapng 432 Bytes keith, 02/28/2024 12:27 AM

Related issues

Related to OsmoBSC - Bug #4683: properly report OM2000 bring-up problemsNewlaforge07/30/2020

Actions
Actions #1

Updated by keith about 1 month ago

  • Related to Bug #4683: properly report OM2000 bring-up problems added
Actions #2

Updated by keith about 1 month ago

  • Description updated (diff)
Actions #3

Updated by keith about 1 month ago

Oh! This looks like it might be as simple as including the RSL_IE_ERIC_BCCH_MAPPING
at the end of the rsl_msgb, as we already do for a SI13 on the Ericsson.

See abis_rsl.c:284

Tested that and I can now observe the SI2q on the air on C0

Actions #4

Updated by keith about 1 month ago

While I'm here, the BTS is also complaining about the (empty) SI 5ter

I need to actually configure an SI5ter and check if it is accepted.

Actions #5

Updated by laforge about 1 month ago

On Wed, Feb 28, 2024 at 01:21:47AM +0000, keith wrote:

Tested that and I can now observe the SI2q on the air on C0

excellent!

Actions #6

Updated by keith about 1 month ago

  • Assignee set to keith

I have pushed branch keith/rbs_hacks
https://gitea.osmocom.org/cellular-infrastructure/osmo-bsc/src/branch/keith/rbs_hacks

I tried some fuzzing, but I did not get it to accept 5ter. Not such an urgent SI for me at this time or anything, but I do wonder why.

Maybe somebody tnt laforge ? could take a look at the traces that were originally used and see if there is a SI 5ter. Maybe it has some IE pre or post-pended?

Actions #7

Updated by laforge about 1 month ago

keith wrote in #note-6:

Maybe somebody tnt laforge ? could take a look at the traces that were originally used and see if there is a SI 5ter. Maybe it has some IE pre or post-pended?

I couldn't find any SI 5ter traces, at least not within looking for half an hour, sorry.

Actions

Also available in: Atom PDF

Add picture from clipboard (Maximum size: 48.8 MB)