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pespin gerrit-no-reply at lists.osmocom.orgHello osmith, Jenkins Builder, laforge, dexter, I'd like you to reexamine a change. Please visit https://gerrit.osmocom.org/c/osmo-bts/+/25434 to look at the new patch set (#2). Change subject: ta_control: Allow switching TA quicker ...................................................................... ta_control: Allow switching TA quicker >From TS 45.010 5.6.1 (delay tracking for circuit switched channels): """ Restricting the change in timing advance to 1 symbol period at a time gives the simplest implementation of the BTS. However the BTS may use a larger change than this but great care must then be used in the BTS design. """ In general 1 TA at a time (every 480ms of SACCH block) should be enough, since section 5.6.3 states: """ The control loop for the timing advance shall be implemented in such a way that it will cope with MSs moving at a speed up to 500 km/h """ Which is ~140 m/s, and 1 TA step around 500m, so most of the time we should be save and no steps of more than 1 TA should be required. However, unlikely changes from reflected to direct signal or vice versa could produce higher increments, so let's increase the maximum step size allowed to 2 in order to give more room. Change-Id: I9e48faabf3090588233e274b2b39065cf85fbec7 --- M src/common/ta_control.c M tests/ta_control/ta_control_test.ok 2 files changed, 232 insertions(+), 232 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/34/25434/2 -- To view, visit https://gerrit.osmocom.org/c/osmo-bts/+/25434 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bts Gerrit-Branch: master Gerrit-Change-Id: I9e48faabf3090588233e274b2b39065cf85fbec7 Gerrit-Change-Number: 25434 Gerrit-PatchSet: 2 Gerrit-Owner: pespin <pespin at sysmocom.de> Gerrit-Reviewer: Jenkins Builder Gerrit-Reviewer: dexter <pmaier at sysmocom.de> Gerrit-Reviewer: laforge <laforge at osmocom.org> Gerrit-Reviewer: osmith <osmith at sysmocom.de> Gerrit-MessageType: newpatchset -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/gerrit-log/attachments/20210913/2deac400/attachment.htm>