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Feature #5782

closed

Feature #4851: VCGS/VBS support in osmo-bts

Transmit SYSTEM INFORMATION TYPE 10 in DL SACCH of VGCS/VBS downlink

Added by laforge over 1 year ago. Updated 3 months ago.

Status:
Resolved
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
11/21/2022
Due date:
% Done:

100%

Spec Reference:
Tags:

Description

See 3GPP TS 44.018 Section 9.1.50

Whever we have a VBS/VGCS TCH active, SI10 must be transmitted in DL SACCH to inform the MS about neighbor cells.

The BSC should send us SI10, like all othe SI. The BTS just schedules their transmission.


Related issues

Related to OsmoBSC - Feature #5783: Generate + Send SYSTEM INFORMATION TYPE 10 to BTSsResolvedjolly11/21/2022

Actions
Actions #1

Updated by laforge about 1 year ago

  • Related to Feature #5783: Generate + Send SYSTEM INFORMATION TYPE 10 to BTSs added
Actions #3

Updated by jolly 6 months ago

  • Assignee set to jolly

System Information Type 10(bis/ter) is optional for the network. It is required for the phone to perform cell change during voice group call.

There is currently no implementation of it.

Actions #4

Updated by jolly 6 months ago

  • Status changed from New to In Progress
Actions #5

Updated by fixeria 5 months ago

In a Jitsi call with jolly we agreed that it would be good to have the si10ro additionally implemented in TTCN-3/TITAN, so that we can validate the C version against something else. Here is an untested implementation:

https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/34578 library: add System Information Type 10 Rest Octets codec [NEW]

I also pushed a branch with an additional patch allowing to feed the decoder with test samples:

https://cgit.osmocom.org/osmo-ttcn3-hacks/log/?h=fixeria/si10ro
https://cgit.osmocom.org/osmo-ttcn3-hacks/commit/?h=fixeria/si10ro&id=23b205432f2952c04e04b4d720adfa67dec5db64

Actions #6

Updated by laforge 4 months ago

jolly: is this implemented/merged by now? Status is still in progress and 0% here, doesn't seem to reflect reality.

Actions #7

Updated by jolly 4 months ago

  • % Done changed from 0 to 90

The work is almost done, one patch of osmo-bsc is not yet ready/merged.

Actions #8

Updated by jolly 3 months ago

  • Status changed from In Progress to Resolved
  • % Done changed from 90 to 100
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