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Bug #2965

No measurement reports sent for channels other than TCH

Added by keith over 1 year ago. Updated about 1 year ago.

Status:
Resolved
Priority:
High
Assignee:
Category:
-
Target version:
-
Start date:
02/19/2018
Due date:
% Done:

100%

Spec Reference:

Description

There appear to be no measurement reports arriving at the BSC anymore for SDCCH
(For my part, this is observed with legacy nitb)

Possibly some commits last year to do with measurement periods introduced this?
since 67d8c72c2eab1d13bed3e8ac98338c996bf08df8 maybe?


Related issues

Related to OsmoBTS - Bug #2975: OsmoBTS doesn't generate measurement indications in absence of uplink burstsStalled2018-02-21

History

#1 Updated by laforge over 1 year ago

  • Related to Bug #2975: OsmoBTS doesn't generate measurement indications in absence of uplink bursts added

#2 Updated by laforge over 1 year ago

  • Assignee set to laforge
  • Priority changed from Normal to High

what kind of SDCCH have you tried? SDCCH/4 or SDCCH/8?

My testing has shown that they are present for SDCCH/8 but missing for SDCCH/4.

I have pushed a fix for the bug I have observed to https://gerrit.osmocom.org/6871

Please comment on whether this fixes your issues, too, or if you experience missing measurement reports beyond SDCCH/4.

#3 Updated by laforge over 1 year ago

Actually, I was wrong. The problem affected both SDCCH/4 and SDCCH/8.

I don't understand how those old/existing fn102 were computed and how they have been verified. At least with osmo-bts-trx, my patches are required to make measurement reports work. This must be double-checked with other BTS types.

dexter: Do you have any idea how you verified measurement reports for SDCCH/4 and SDCCH/8 at the time?

#4 Updated by laforge about 1 year ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 80

related patch has been merged to master.

#5 Updated by laforge about 1 year ago

  • Assignee changed from laforge to dexter

Please verify measurement reports now are present formall channel types on sysmo/octphy

#6 Updated by keith about 1 year ago

Looks good on sysmoBTS 1002 (with nightly build)
I am seeing meas for SDCCH and TCH
:)

#7 Updated by dexter about 1 year ago

The patch in question dates back to code that had had been contributed by Octasic inc. I have checked the code against the specification. Since I managed to find the numeric values 11 and 36 in 3GPP TS 45.008 the implementation looked plausible to me. However, I had difficulties to understand the offsets in the code and I still have them (even with the corrected version).

I did tests for the traffic channels only (see OS#2329). The signaling channels slipped through.

#8 Updated by laforge about 1 year ago

  • Status changed from In Progress to Resolved
  • % Done changed from 80 to 100

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