There's no need to maintain a duplicate msgb_queue_flush(), which
returns the amount of freed messages (feature not used at all by the
callers).
Change-Id: I9841e18ca0b7b852130bbb02a510e43a3b3fd93f
This is a preparation commit in order to move power loops up in the
stack in order to have DTXu information available, in order to decide
whether SUB or FULL ul measurements should be used in the MS Power
Control Loop.
Function rsl_tx_meas_res() is stripped from code changing state, and it
simply encodes content and transmits the message.
Change-Id: Id67259ec9ac4c2c33bd0eef3f64450affbe3fb9f
osmo-bts currently does not generate a measurement report in case the
SACCH of the related traffic channel is lost. This is a problem because
the moment when reception gets bad measurmenet reporting is crucial to
carry out handover decisions effectively.
The presence of a SACCH block controls the conclusion of the measurement
interval and the sending of the RSL measurement report. The latter one
not only requires a measurmenet indication, it also requires a fully
intact SACCH block.
Lets use the NOPE / IDLE indications from V1 of the TRXD protocol to
ensure a SACCH block is always reported up to l1sap.c. In cases where
the SACCH is bad, trigger the sending of the RSL measurement report
manually without attaching the measurmenet data from the MS (which we do
not have in this case)
Related: OS#2975
Depends: osmo-ttcn3-hacks Ib2f511991349ab15e02db9c5e45f0df3645835a4
Change-Id: Idfa8ef94e8cf131ff234dac8f93f337051663ae2
This adds the final missing part to full CBCH support:
* keep a tab on the current queue length for basic + extended CBCH
* keep rate counters about the number of sent / transmitted SMSCB
* send CBCH LOAD information via RSL to the BSC
Change-Id: I7068c7937a60a900c40439115bb84dc3ee0d061f
This commit doesn't change internal logic of any model, only the API to
be able to return result of connect TS asyncrhonously since some models
(like osmo-bts-trx) require some time to process the result. This way
PDCH ACT/DEACT (N)ACK can be sent once the result of this long process
is known. For instance, nowadays in osmo-bts-trx we PDCH (DE)ACT ACK
before getting the result from SETSLOT on the TRX iface.
With this new API, bts_model_ts_connect doesn't return any value
synchronously. Instead, it is expected to always end up calling
cb_ts_connected with the return code from the TS activation process. 0
is considered a successs, while any other value is considered an error.
Change-Id: Ie073a4397dd2f1a691968d12b15b8b42f1e1b0cf
This way we give the opportunity to the BSC to release the channel
quicker, otherwise it has to wait until T3101 expires.
Same procedure is already done in rsl.c rsl_rx_imm_ass() when we return
an error (hard limit AGCH queue len reached) from bts_agch_enqueue().
Related: OS#2990
Change-Id: Id9927c0789054ce3ecc7b30380585a1ffe05db5a
* do not deactivate lchan when called with LCHAN_REL_ACT_REACT
* add fixme comment
It's unclear yet if any special steps are required for osmo-bts-trx so
let's just make it compatible with setups [1] using BS_AG_BLKS_RES != 1
for now.
Background: CCCH is auto activated by some OsmoBTS - before we receive
SI3, see 4a85828462. To accommodate for
that we deactivate CCCH in common/rsl.c, which triggers BTS-model
specific callback sapi_deactivate_cb() which updates parameters and
activates it again.
In case of osmo-bts-trx there is no auto-activation and (seems to be) no
need in special interaction with hw to activate channel (no
lchan_activate()) hence we can just skip entire
deactivate/setup/activate again routine.
[1] "channel-descrption bs-ag-blks-res N" in OpenBSC config file.
Related: OS#1575
Change-Id: I20b89ba1e43d1414180b083cd1e085eeffe5d513
Fix SID_FIRST_INH detection during speech and when SID_FIRST is interrupted by FACCH.
Fix SID_UPDATE_INH detection during silence and when SID_UPDATE is interrupted by FACCH.
Add a delay for SID_FIRST to appear at the right time after FACCH.
Fix extra byte sent in downlink for SID_FIRST and SID_UPDATE.
Change-Id: Ia811305e15541f2376005df736bd610e8b0d2f69
Do not assume that 1 == BS_AG_BLKS_RES but take that information from
SI3. Note: due to current implementation quirks we activate channels
before SI3 obtained, than we deactivate channels upon receiving SI3 and
activate them again. This might not be necessary once we migrate to
proper OML state machines.
This affects lc15 and sysmo hw.
Change-Id: I11377b12680ac3b2f77f80e742b6f0af63fc9c1e
Related: OS#1575
Remove lchan deactivation related code duplication to facilitate future
use for dynamic CCCH re-activation.
Change-Id: Id0d3b19dbfaa16d1734321a07a6eb0355bfd77c9
Use "impossible" dummy value to initialize last_fn to prevent dropping
of 1st RTP frame due to timestamp jump.
Fixes: OS#1803
Change-Id: I485af21f6761048d12dc7f5552fcdd46daf786ed
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
lchan_lookup in openbsc abis_rsl.c and rsl_lchan_lookup() rsl.c are the
same code, except for the log context, which is only set in abis_rsl.c.
The common code was factored out to gsm_data_shared.c in openbsc.git.
Use the *rc return code argument to keep the logging part in the newly
introduced thin wrapper lchan_lookup() in common/rsl.c. This also removes code
dup for logging
The rsl_lchan_lookup() implementation is removed from osmo-bts, so a recent
openbsc is needed to build this.
Change-Id: Ibc469b75e31560271be8633d524366442d27e6fb
We're about to introduce a new kind of dynamic channel, which will also use
parts of the ip.access mode dyn PDCH code paths. Make sure the general parts
have general names and mark ip.access specific parts as such.
Rename dyn_pdch_ts_[dis]connected() to cb_ts_[dis]connected().
Rename dyn_pdch_complete to ipacc_dyn_pdch_complete().
From cb_ts_[dis]connected(), factor out the current code into static
functions ipacc_dyn_pdch_[dis]connected() -- this will make sense once the
new dynamic kind is added to cb_ts_[dis]connected().
Change-Id: I7da5b7cb7b48572671f50e0dec97d9eec3083df1
React on IPAC PDCH ACT and DEACT messages and invoke the PCU and bts_model_ts_*
APIs to effect switchover. The dyn PDCH interaction is described in the comment
to rsl_rx_dyn_pdch(), the main entry point for PDCH switchover.
In case the bts_model_ts_* are not implemented (or return other errors),
reply with an IPAC PDCH ACT/DEACT NACK.
Add callbacks that mark steps in the PDCH switchover process,
dyn_pdch_ts_disconnected(), dyn_pdch_ts_connected() and dyn_pdch_complete().
Add hooks in l1sap.c on channel activation and release confirmation, to call
dyn PDCH callbacks.
BTS dyn PDCH implementations should invoke dyn_pdch_ts_disconnected() and
dyn_pdch_ts_connected() when bts_model_ts_disconnect() or
bts_model_ts_connect() are called, respectively. (upcoming for sysmoBTS)
Change-Id: Id2f5f77121a65d6c14eac127b3d4fb50e97a77ab
Use the lchan->rel_act_kind field for the BCCH activatiob by OML.
The lchan's should be marked as active but no event should be sent to
the BSC. This is mostly like the PCU. We can now remove the secnd
argument from lchan_activate.
The PCU is forcing the activation of a PDCH. Currently the BSC
will receive a channel act ack for a channel that was not
activated at all. Use the "release_reason" flag of the lchan
to see if we have requested a normal activation or a silent
one.
It feels a bit odd to do it in the TX function but it is the
most easy solution right now. I have added logging so it will
not be totally silent.
Chapter 5.2 applies to MS procedure, but 5.3 (BSS procedure) defines no
exact criterion, so I decided to use the procedure equivalent to MS.
The criterion is based on a counter S, which is initialized to a preset
RADIO_LINK_TIMEOUT, which can be configured via VTY. Whenever a received
SACCH block is bad, S is counted down by one. If SACCH block is
successfully decoded, S is counted up by two, but never above initial
RADIO_LINK_TIMEOUT value. If S reaches 0, an RSL Connection Failure
Indication with cause RF Radio Link Failure is sent to BSC, which then
aborts channel.
Use link timeout value from BSC via OML attribute.
How to test:
- Set "debug" for "meas" logging.
- Start silent call to an attached mobile.
- Remove battery from mobile or shield mobile.
- Watch S count down.
We now count the total number of RACH slots, the number with rx level
above the busy threshold, and the number of valid access bursts.
This data is used to generate RSL CCCH LOAD INDICATION for the RACH.
Send the RSL ACT ACK/NACK after the Layer1 firmware has acked the
activation/deactivation. In case the channel can not be activated
we will send a NACK. In case the channel can not be deactivated we
will send an ACK and the next time the channel is activated we will
send a NACK. The release ack will be sent once the TxDownlink of the
TCH/SDCCH is closed.
Change the rsl_tx_chan_nack method to create a new msgb to be used
by the hardware layer, change the return value to ask the caller to
delete the msgb.
This code re-works osmo-bts to add support for the upcoming sysmocom BTS.
It also tries to add some level of abstraction between the generic
part of a BTS (A-bis, RSL, OML, data structures, paging scheduling,
BCCH/AGCH scheduling, etc.) and the actual hardware-specific bits.
The hardware-specific bits are currently only implemented for the sysmocom
femtobts, but should be (re-)added for osmocom-bb, as well as a virtual
BTS for simulation purpose later.
The sysmocom bts specific parts require hardware-specific header files
which are (at least currently) not publicly distributed.
Pau Espin
Vadim Yanitskiy
Philipp Maier
Harald Welte
Max
Neels Hofmeyr