Change in osmo-bts[master]: WIP: TA loop: Take into account UL SACCH 'Actual Timing advance' field

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laforge gerrit-no-reply at lists.osmocom.org
Tue Sep 7 10:10:07 UTC 2021


laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-bts/+/25386 )

Change subject: WIP: TA loop: Take into account UL SACCH 'Actual Timing advance' field
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Patch Set 1:

(2 comments)

in general a good idea, but probably should be tested using the osmo-rfds to see it [still] works wit real MS

https://gerrit.osmocom.org/c/osmo-bts/+/25386/1/src/common/ta_control.c 
File src/common/ta_control.c:

https://gerrit.osmocom.org/c/osmo-bts/+/25386/1/src/common/ta_control.c@40 
PS1, Line 40: advance
it's only a "timing offset" or "time of arrival" but i've never heard 'timing advance offset'.


https://gerrit.osmocom.org/c/osmo-bts/+/25386/1/src/common/ta_control.c@49 
PS1, Line 49: 	/
I'm not sure averaging is useful in the TA context. There might be some loop filtering needed to avoid oscillation, similar to MS power control.



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Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Change-Id: I2d0f128c8dcac93ee382283a1c91fca76623b8fc
Gerrit-Change-Number: 25386
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: dexter <pmaier at sysmocom.de>
Gerrit-Reviewer: fixeria <vyanitskiy at sysmocom.de>
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-Comment-Date: Tue, 07 Sep 2021 10:10:07 +0000
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