Hi.
I've noticed that we don't have any code (besides basic definition) for handover request message (BSS_MAP_MSG_HANDOVER_RQST) from 48.008 3.2.1.8 in libosmocore or osmo-*sc.
Is it because it's in some patch hanging somewhere in gerrit or we don't need it (yet)?
On Thu, Nov 08, 2018 at 05:50:15PM +0100, Max wrote:
Hi.
I've noticed that we don't have any code (besides basic definition) for handover request message (BSS_MAP_MSG_HANDOVER_RQST) from 48.008 3.2.1.8 in libosmocore or osmo-*sc.
Is it because it's in some patch hanging somewhere in gerrit or we don't need it (yet)?
We have a BSSMAP Handover *Required*, which is what osmo-bsc sends to the MSC to initiate inter-BSC handover.
The MSC then composes the Handover Request message sent to the new BSC, and since osmo-msc doesn't support inter-BSC ho yet (I will soon implement it), we indeed have no encoding or use of that message in Osmocom yet.
See https://www.eventhelix.com/RealtimeMantra/Telecom/GSM_Handover_Call_Flow.pdf
When testing osmo-bsc, I relied on a third-party MSC to send this message. Also ttcn3-bsc-tests encode it when emulating the MSC part of inter-BSC handover, but that's from ttcn3, not from libosmocore.
I'm curious, why would you need this message? You're not writing the MSC part of inter-BSC HO, are you?
~N
Hi.
Thanks for detailed write-up.
09.11.18 01:07, Neels Hofmeyr пишет:
I'm curious, why would you need this message? You're not writing the MSC part of inter-BSC HO, are you?
I'm working on LCLS which have to work properly in case of handover as well. Handover request is one of the messages which have LCLS-specific fields so it peeked my curiosity :)
-
Max -
Neels Hofmeyr