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Feature #3054

Extended (11-bit) RACH support in OsmoTRX

Added by laforge 8 months ago. Updated about 22 hours ago.

Status:
Feedback
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
03/10/2018
Due date:
% Done:

80%

Spec Reference:

Description

OsmoTRX is currently only correlating with one of the three RACH sync sequences indicated in TS 05.02 5.2.7. We need to define TS1+TS2 as well as correlated against thosee during RACH detection

 const BitVector GSM::gRACHSynchSequence("01001011011111111001100110101010001111000");
+const BitVector GSM::gRACHSynchSequenceTS1("01010100111110001000011000101111001001101");       /* EGPRS with 8PSK in uplink */
+const BitVector GSM::gRACHSynchSequenceTS2("11101111001001110101011000001101101110111");       /* EGPRS without 8PSK in uplink */

Related issues

Related to OsmoBTS - Feature #1854: 11bit RACH support in osmo-bts-trxStalled2016-11-18

Has duplicate OsmoPCU - Bug #1834: Extended (11-bit) RACH is not properly handledStalled2016-10-25

History

#1 Updated by laforge 8 months ago

  • Related to Feature #1854: 11bit RACH support in osmo-bts-trx added

#2 Updated by fixeria 28 days ago

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

#3 Updated by laforge 3 days ago

  • Assignee set to tnt

#4 Updated by fixeria about 22 hours ago

  • Tracker changed from Bug to Feature
  • Subject changed from 11bit RACH support in OsmoTRX to Extended (11-bit) RACH support in OsmoTRX
  • Status changed from New to Feedback
  • % Done changed from 0 to 80

Initial work has already been done, please see:

https://gerrit.osmocom.org/11390/ sigProcLib: introduce both TS1 and TS2 RACH synch. sequences
https://gerrit.osmocom.org/11422/ sigProcLib: add a CorrType for extended (11-bit) RACH
https://gerrit.osmocom.org/11423/ VTY: add extended (11-bit) RACH detection toggle

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