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Feature #4852

VGCS/VBS support in osm-bsc

Added by laforge 28 days ago. Updated 28 days ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
-
Target version:
-
Start date:
11/05/2020
Due date:
% Done:

0%

Spec Reference:
Tags:

Description

In order to support GSM-R ASCI, we'd need VGCS/VBS support.

In the BSC, this mostly means the following:
  • definition of VBS/VGCS areas e.g. via VTY (or simply assume all areas are global in initial implementation)
  • Abis: generation of RSL NOTIFICATION messages
  • A interface / BSSMAP
    • VGCS/VBS SETUP + VGCS/VBS SETUP ACK + VGCS/VBS SETUP REFUSE messages
    • VGCS/VBS ASSIGNMENT REQ
    • UPLINK REQUEST, UPLINK RELEASE NOTIFICATION, UPLINK SEIZED COMMAND, UPLINK REQUEST ACK, UPLINK REJECT
    • VGCS ADDITIONAL INFORMATION
There's quite a bit of state machines and logic required.
  • VGCS/VBS setup procedure
  • VCGS/VBBS assignment proceure
    • procedures according to TS 48.008 section 3.1.21, 3.1.22
  • handling of uplink related allocation and release procedures (VGCS)
  • periodic NCH transmissions
  • SACCH indications of NCH changes
  • managing the bsc-colocated osmo-mgw
    • allocate a 'broadcast' endpoint with one sender and many recipients
    • RTP connections for each BTS
    • RTP connection to the MSC
    • modifying rcvonly/sendonly/sendrecv according to current talker setate (VGCS)

Related issues

Related to OsmoBTS - Feature #4851: VCGS/VBS support in osmo-btsNew11/05/2020

Related to OsmoMGW - Feature #4853: VBS/VGCS support in osmo-mgwNew11/05/2020

Related to OsmoMSC - Feature #4854: VGCS/VBS support in osmo-mscNew11/05/2020

History

#1 Updated by laforge 28 days ago

  • Description updated (diff)

#2 Updated by laforge 28 days ago

  • Tags set to ASCI

#3 Updated by laforge 28 days ago

  • Project changed from OsmoBTS to OsmoBSC

#4 Updated by laforge 28 days ago

#5 Updated by laforge 28 days ago

#6 Updated by laforge 28 days ago

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