Hi Neels,
please find the original discussion related to the "new" algorithm attached
for your reference, in case you were not aware of it. It had meanwhile
been migrated to
https://osmocom.org/projects/openbsc/wiki/Proposed_New_Handover_Algorithm
On Fri, Nov 24, 2017 at 02:19:42AM +0100, Neels Hofmeyr wrote:
> And ... do you remember any high level conclusions from when you implemented
> the branch, things I should be aware of when testing and adopting the code?
> Did
> it work out as expected? How well tested is it?
I would also be interested in hearing about this. We know that at least some
users were using it in the past, but that's already quite some time in the
past. Would be great if those users could speak up and hence do their part
in contributing to the merge of a feature that they use.
--
- Harald Welte <[email protected]> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
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Hi,
Jean-Samuel and me developed an advanced handover algorithm for OpenBSC.
Before implementing it, we would like to get any feedback, so I decided
to post it in this mailing list. The document that describes the
algorithm can be downloaded at:
http://home.eversberg.eu/handover-algorithm-v2.3.pdf
Regards,
Andreas
Handover shall ensure that the mobile station is always on the best cell
during a call. This results in best speech quality and allows a lower TX
level (up-link) to save battery and reduce interference. Sometimes this
is not desirable, especially if a cell with large coverage becomes
congested after handover. In this situation it makes sense to balance
the usage between cells to prevent congestion. If a cell is congested,
one or several mobile stations need to be handovered to a different
cell, even if that cell is not the best cell for these mobile station.
In case that a mobile station needs to handover to prevent a loss of
radio link, it makes sense to handover it to a cell that is congested
afterwards. In this situation, a different mobile station on the
congested target cell must be handovered to a non-congested neighbor
cell, to solve or balance the congestion.
In order to negotiate used codec and TCH rate during call setup,
Immediate Assignment shall assign an SDCCH channel, if available. After
negotiation is complete, assignment to the available TCH slot is made.
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Hi Jolly,
thanks a lot for working on this.
As a side-note: I think there is little point in referring to a PDF file
on a web server, especially if that PDF file only contains plain text.
Either send that full plain text to this mailing list for discussion,
and/or maintain the text in the wiki. This way it can be maintained
collaboratively and stays with the other information related to the
project.
Regards,
Harald
--
- Harald Welte <[email protected]> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
--- End Message ---
--- Begin Message ---
Harald Welte wrote:
> As a side-note: I think there is little point in referring to a PDF file
> on a web server, especially if that PDF file only contains plain text.
> Either send that full plain text to this mailing list for discussion,
> and/or maintain the text in the wiki. This way it can be maintained
> collaboratively and stays with the other information related to the
> project.
good advice!
http://openbsc.osmocom.org/trac/wiki/handover
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