9 Sep
2016
9 Sep
'16
8:45 a.m.
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http://cgit.osmocom.org/osmo-bts/commit/?id=d44f0772f9aac42f0444eac88ec7501…
commit d44f0772f9aac42f0444eac88ec7501e785ab4d8
Author: Neels Hofmeyr <nhofmeyr(a)sysmocom.de>
Date: Mon Aug 22 23:07:09 2016 +0200
dyn TS: if PCU is not connected, allow operation as TCH
Before this patch, Osmocom style TCH/F_TCH/H_PDCH dyn TS were paralyzed if no
PCU was running. The state of the dyn TS would lock up in the PDCH activation
phase since the PCU never completed the process.
Make more robust, i.e. don't concern the BSC with PDCH activation failures.
This matches the way plain PDCH TS work: besides declaring the TS as PDCH, the
BSC is not involved and is not told about errors.
During PDCH deactivation, still wait for the PCU to tear down the PDTCH SAPIs,
but in case no PCU is connected, send a rel ack right away.
Thus, the BSC will happily switch Osmocom style dynamic timeslots to and from
PDCH mode, using the dyn TS as voice channels as needed, and not caring about
possible PDCH failures. GPRS starts working right away as soon as a PCU
connects, regardless of dyn TS having been used for voice any number of times,
and without another switchover needed.
In detail:
In rsl_rx_chan_activ(), upon receiving a PDCH activation, send an RSL chan act
ack right away, unconditionally (with an explaining comment). Do not concern
the Abis link with PDCH activation failures.
Since we're acking right away now, drop the chan act ack that would follow
after the PCU activation: as before dyn TS, only send acks and nacks for
rel_act_kind == LCHAN_REL_ACT_RSL (PDCH runs as LCHAN_REL_ACT_PCU).
In dyn_ts_pdch_release, indicate that the PCU is not connected by means of
returning 1. In rsl_rx_rf_chan_rel(), use this indicator to send a rel ack
right away if the PCU is not connected.
Change-Id: I2a0b9730197786b99ff3bc1f08c75f7d279cb1f7
-----------------------------------------------------------------------
Summary of changes:
src/common/rsl.c | 45 ++++++++++++++++++++++++++++++++++-----------
1 file changed, 34 insertions(+), 11 deletions(-)
hooks/post-receive
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Osmocom BTS-side code (Abis, scheduling, ...)