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Bug #3005

closed

Invalid BER conversion from PHY to L1SAP on osmo-bts-{sysmo,lc15}

Added by laforge about 6 years ago. Updated about 6 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Category:
osmo-bts-sysmo
Target version:
-
Start date:
02/26/2018
Due date:
% Done:

30%

Spec Reference:

Description

L1SAP uses 'ber10k' values, i.e. BER in 1/10000 units, where 10000 is all errors are bit-errors (= 100%).

The PHY on osmo-bts-sysmo and osmo-bts-lc15 is reporting a float fBer value scaled to 1, i.e. 1.00 = 100% and hence must be 10000 as ber10k.

As the process_meas_res() functions of those two BTS models were using a factor of 100, BER values reported on those BTS models were too low by a factor of 100, resulting in way too optimistic RxQual values reported to the BSC.

Actions #1

Updated by laforge about 6 years ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 30
Actions #2

Updated by laforge about 6 years ago

  • Status changed from In Progress to Resolved
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