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Feature #4941

VAMOS support in OsmoBTS

Added by laforge 3 months ago. Updated 3 months ago.

Status:
In Progress
Priority:
Urgent
Assignee:
Category:
-
Target version:
-
Start date:
01/12/2021
Due date:
% Done:

0%

Spec Reference:

Description

This ticket should document what needs to be done in terms of supporting VAMOS from OsmoBTS, and to track its status via check-lists and possibly sub-issues.

Our implementation will be focusing on osmo-bts-trx as none of the "proprietary PHY" we support implement any VAMOS support.

This likely includes (at least)
  1. Indication of [which level of] VAMOS support the BTS has via OML attributes to BSC
  2. Implementation of "shadow TRX" concept in data structures
  3. Implementation of VAMOS related RSL extensions on Abis
  4. Implementation of a new TRXDv2 protocol from/to the TRX
  5. VAMOS-aware uplink + downlink power control
  6. generation of one set of downlink symbols from the real + shadow timeslot/lchan

The corresponding BSC related work is tracked in #4940


Related issues

Related to OsmoBSC - Feature #4940: VAMOS support in OsmoBSCNew01/12/2021

Related to Cellular Network Infrastructure - Feature #4006: TRX protocol: wind of changeIn Progress05/17/2019

Blocked by Cellular Network Infrastructure - Bug #5112: osmo-gsm-manuals: build verification is brokenFeedback04/10/2021

History

#1 Updated by laforge 3 months ago

#2 Updated by Hoernchen 3 months ago

According to https://opus4.kobv.de/opus4-fau/files/5533/DissertationMichaelRuder.pdf chapter 4 random pairings with scpir=0 should be fine for the time being.

#3 Updated by fixeria 3 months ago

  • Status changed from New to In Progress

#4 Updated by fixeria about 2 months ago

#5 Updated by fixeria 1 day ago

  • Blocked by Bug #5112: osmo-gsm-manuals: build verification is broken added

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