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The branch, neels/dyn_no_pcu has been updated
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discards 244db5514fbdcc684ac64c19e4b3e268eea5d027 (commit)
via 42edba5fe67ac96d4dde6ebb5f5d84fea9124f4f (commit)
via 370a91c4eac99948376c2175ef9e352c70be2b53 (commit)
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- Log -----------------------------------------------------------------
http://cgit.osmocom.org/osmo-bts/commit/?id=42edba5fe67ac96d4dde6ebb5f5d84fea9124f4f
commit 42edba5fe67ac96d4dde6ebb5f5d84fea9124f4f
Author: Neels Hofmeyr <nhofmeyr at 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
http://cgit.osmocom.org/osmo-bts/commit/?id=370a91c4eac99948376c2175ef9e352c70be2b53
commit 370a91c4eac99948376c2175ef9e352c70be2b53
Author: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Date: Mon Aug 22 18:23:03 2016 +0200
common/rsl: move decision whether to chan act ack/nack to common function
Prepare for a dyn TS patch that needs to call rsl_tx_chan_act_ack() directly
without the rel_act_kind decision.
Add function rsl_tx_chan_act_acknack() to wrap rsl_tx_chan_act_ack() and
rsl_tx_chan_act_nack(). Move the decision whether to drop the ack/nack, based
on lchan->rel_act_kind, to the new function, losing some code dup.
Change all callers to use the new function; drop the two older ones from rsl.h
and make them static.
Note: for nack, the exception for dyn TS in PDCH mode was missing
(rsl_tx_chan_act_nack() had only the rel_act_kind != LCHAN_REL_ACT_RSL
condition, but should also have had the dyn TS exception as in
rsl_tx_chan_act_ack()). I already know that this exception will again be
removed in an upcoming commit, but for patch readability it logically makes
sense to add it here. To easily include the nack case, drop the check for which
pchan the dyn TS is operating as, because a rel_act_kind == LCHAN_REL_ACT_PCU
implies that it is either already in or trying to become PDCH mode.
Change-Id: I57ba60c670730c6d7877a6a9b96ece0a7679a0bb
-----------------------------------------------------------------------
Summary of changes:
src/common/rsl.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
hooks/post-receive
--
Osmocom BTS-side code (Abis, scheduling, ...)