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Bug #1548

11bit RACH support

Added by laforge over 3 years ago. Updated 15 days ago.

Status:
Stalled
Priority:
High
Assignee:
-
Target version:
-
Start date:
02/23/2016
Due date:
% Done:

20%

Spec Reference:

Description

This is currently not supported/implemented. Having 11bit RACH gives us more information on the cause of channel establishemnt, especially when GSM + GPRS are used together.


Related issues

Related to OsmoBTS - Bug #1854: 11-bit RACH support breaks default 8-bit RACH: collisions are possibleResolved11/18/2016

Related to OsmoTRX - Feature #3054: Extended (11-bit) RACH support in OsmoTRXStalled03/10/2018

Related to OsmoPCU - Feature #3014: fix re-apply patches reverted by #3013, related: UL and DL packet assignment, and Timing AdvanceResolved02/27/2018

Has duplicate OsmoPCU - Bug #1834: Extended (11-bit) RACH is not properly handledClosed10/25/2016

History

#1 Updated by laforge almost 3 years ago

  • Status changed from New to In Progress
  • Assignee set to arvind.sirsikar

11bit RACH is actually being worked on, assigning this to aravind. It might even be complete for some BTS models by now.

#2 Updated by arvind.sirsikar almost 3 years ago

Currently it is supported and integration tested for NuRAN LC1.5 and LC1.0. However there is no support for osmo-trx.

#4 Updated by laforge about 2 years ago

  • Assignee changed from arvind.sirsikar to sysmocom

#5 Updated by laforge about 2 years ago

  • Status changed from In Progress to New
  • Assignee changed from sysmocom to msuraev

#6 Updated by laforge about 2 years ago

  • Priority changed from Normal to High

#7 Updated by msuraev almost 2 years ago

  • Status changed from New to In Progress
  • % Done changed from 0 to 10

Encoding/decoding support for 11-bit RACH for libosmocoding is available in gerrit 5062.

#8 Updated by msuraev almost 2 years ago

  • Related to Bug #1854: 11-bit RACH support breaks default 8-bit RACH: collisions are possible added

#9 Updated by msuraev almost 2 years ago

  • Status changed from In Progress to Stalled
  • % Done changed from 10 to 20

Gerrit 5062 has been merged. Have to verify whether 11-bit RACH is supported on sysmoBTS.

#10 Updated by msuraev over 1 year ago

Test with "gprs 11bit_rach_support_for_egprs" failed - seems like smth wasn't merged/missing. See related BTS bug.

#11 Updated by laforge over 1 year ago

  • Assignee changed from msuraev to sysmocom

#12 Updated by laforge over 1 year ago

  • Assignee changed from sysmocom to lynxis

#13 Updated by fixeria about 1 year ago

The following patch should implement 11-bit RACH support of osmo-bts-trx:

https://gerrit.osmocom.org/#/c/osmo-bts/+/6315/

but should be properly tested.

#14 Updated by laforge about 1 year ago

  • Assignee changed from lynxis to msuraev

#15 Updated by msuraev 12 months ago

  • Has duplicate Bug #1834: Extended (11-bit) RACH is not properly handled added

#16 Updated by msuraev 12 months ago

  • Related to Feature #3054: Extended (11-bit) RACH support in OsmoTRX added

#17 Updated by msuraev 8 months ago

  • Related to Feature #3014: fix re-apply patches reverted by #3013, related: UL and DL packet assignment, and Timing Advance added

#18 Updated by laforge 5 months ago

  • Assignee changed from msuraev to fixeria

#19 Updated by fixeria 15 days ago

  • Assignee deleted (fixeria)

Both osmo-trx and osmo-bts-trx do support 11-bit encoded Access Bursts now. We also have a TTCN-3 test case for that (see BTS_Tests.TC_pcu_ext_rach_content) and it passes. However, all my attempts to test the network with the real phones have been unsuccessful. Unfortunately, I have no time to investigate further now.

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