Otherwise osmo-bts-omldummy would reject OML Set Channel Attributes
containing the hopping parameters. This change is needed for the
new BSC_Tests.TC_fh_params_* test cases.
Change-Id: I38692252baa7a9fc23078121db0a17557950e4d4
Related: SYS#4868, OS#4545
See previous commit adding the unit test about the error description and
expected behavior.
The wrong behavior appeared due to step_size_mdB being unsigned and the
whole addition at the left side of the comparison being turned too as
unsigned, hence a small negative value turning into a big positive
value, and tpp->p_total_cur_mdBm not being updated to speed up the power
ramping.
Change-Id: I36a34362ebc90226fd8e1e190f898c3718fd923a
osmotrx fn-advance (which is the clock_advance variable here) and
osmotrx rts-advance together make up the minimum delay the BTS can react
to a channel request, etc.
The default of 20 are around 92ms which is clearly too much. With
modern hardware and using SCHED_RR a lower value should not be an issue.
See OS#4487 for some related measurements on more CPU-limited devices like a
LimeNet-micro3.
Fixes: OS#4487
Fixes: SYS#4885
Related: SYS#4881
Change-Id: I7da3d0948f38e12342fb714b29f8edc5e9d0933d
We gain other features from libosmovty for free, like configuring
cpu-affinity of the only thread in the process.
Depends: libosmocore.git Change-Id If76a4bd2cc7b3c7adf5d84790a944d78be70e10a
Depends: osmo-gsm-masnuals.git Change-Id Icd75769ef630c3fa985fc5e2154d5521689cdd3c
Related: SYS#4986
Change-Id: Ice46e406b84fa11afcc7ba31e521e7677df73cf3
The idea behind the baseband frequency hopping is quite simple: we
have several RF carriers (transceivers) transmitting and receiving
on fixed frequencies (just like in a regular multi-trx setup), and
an additional burst routing layer between the schedulear and the
transceiver interface (TRXD over UDP).
Speaking in terms of the proposed implementation:
- on Downlink, dlfh_route_br() calculates the ARFCN corresponding
to the current TDMA frame number according to the hopping sequence
parametets, and picks the transceiver with matching ARFCN;
- on Uplink, ulfh_route_bi() iterates over the transceiver list of
of the BTS, calculating hopping ARFCNs for equivalent timeslots,
and picks the one with ARFCN matching the received burst.
In order to avoid frequent transceiver lookups on the Downlink path,
dlfh_route_br() maintains a "cache" in the timeslot state structure.
Unfortunately, this "cache" seems to be useless on the Uplink path,
so ulfh_route_bi() always needs to lookup the matching transceiver
for each burst received over the TRXD interface.
It may also happen that the scheduler will be unable to route an
Uplink or Downlink burst, e.g. due to inconsistent / incorrect
hopping sequence parameters received from the BSC, or in case
if a transceiver gets RF-locked by the BTS operator.
Such events are logged as "FATAL" and aditionally signalled by the
following osmo-bts-trx specific rate counters:
- trx_sched:dl_fh_no_carrier (Downlink), and
- trx_sched:ul_fh_no_carrier (Uplink).
Change-Id: I68f4ae09fd0789ad0d8f1c1e17e17dfc4de8e462
Related: SYS#4868, OS#4546
This change facilitates the upcoming freq. hopping implementation,
in particular scheduling of dummy bursts on C0 with hopping time-
slots. One problem is that we cannot know in advance, whether to
send a dummy burst on a given timeslot unless all transceivers are
processed. For example, trx#3 may want to send a normal burst on
ARFCN of trx#0 (C0), while we have already sent a dummy burst...
Another important aspect is that we shall not be sending dummy
bursts on transceivers other than C0. Scheduling dummy bursts
from _sched_dl_burst() in the context of a single hopping timeslot
of a single transceiver leaves trx_sched_fn() no way to know
whether it's a dummy burst or something else.
Let's solve both problems by moving dummy burst scheduling logic
from _sched_dl_burst() to trx_sched_fn(). Maintain C0 slot-mask
in the inner (per-trx) loop, so that we can fill missing bursts
with dummy bursts afterwards.
Change-Id: I8c3651c27d2991079e83b8abdb7e2c3f95b97a43
Related: SYS#4868, OS#4546
On receipt of either SIGTERM or SIGINT the shutdown FSM initiates
ramping down of the transmit power on Downlink. I noticed that
for some reason osmo-bts-trx stops sending Downlink bursts during
the process of ramping down.
I also noticed the following imporatant message:
DL1C NOTICE scheduler_trx.c:287 No more clock from transceiver
despite the transceiver is still powered on and keeps sending
the clock indications over the TRXC interface.
As it turned out, the problem is that on receipt of either SIGTERM
or SIGINT, we also raise the global 'quit' flag, so in the scheduler
trx_sched_clock() stealthy stops handling the clock indications.
Let's ensure that clock indications are handled regardless of the
state of 'quit' flag, so the ramping down would work as expected.
Change-Id: Ia71133d6f0b900e5e103595c83303a7cc5c06edf
Until now, power-ramp max-initial was only taken into account in order
to skip ramping if the desired target level was below it, in order to
forbid growin too quickly or applying directly to much power given power
amplifier requirements.
However, in the event that a higher tx power level is desired,
max-initial was not taking into account and ramping simply started from
current tx power level, which could be a lot lower than max-initial.
Allow shortcutting the ramping in that case so that max-initial is
applied directly, and ramping continues from there, in order to have a
more expected behavior (max-initial applied the same).
Since max-initial can since a few commits before handle a negative
value, this means One can for instance set max-initial to -10 and still
keep the old behavior of ramping step by step from -10 (rf-locked in
osmo-bts-trx) to 0 or 7 or whatever is the nominal power
(max_power_red).
Change-Id: I4e5742ecdbf66d77ff9445999f6fff43bbf4856a
If TRX is administratively locked during startup, for TS conigured as
TCH/F_PDCH the BSC will send a ACT PDCH message, but osmo-bts-trx won't
apply it by signalling it as available to the PCU, since the TRX is
locked.
That means the ts->flags contains the pending action to activate
it until it is unlocked. As a result, calling trx_set_ts() on it was
hitting the assert inside which expects not to apply the TS until it has
been confirmed by the PCU.
Let's still skip setting the TS and let pcu_tx_info_ind() trigger the
activation confirmation from PCU, since the TRX has just been unlocked.
Fixes following assert:
Assert failed (ts->flags & TS_F_PDCH_PENDING_MASK) == 0 /osmo-bts/src/osmo-bts-trx/l1_if.c:34
Change-Id: Ie3cad15d31870346d03a6e2f6dd32a9d2dd3067e
This allows for instance ramping up from -10 dBm -> -4 dBm if NOMTXPOWER
of SDR is really low (below 0dBm) or because the max_power_red is >=
NOMTXPOWER.
Related: SYS#4920
Change-Id: I0f27fb7b86b58c5a80f5342b66ff4f5d1b775498
Fix power ramping if administrative state changes while previous
opposite change was already ACKED but power ramping was still ongoing.
With previous code, osmo-bts-trx would have sent a NACK and BSc would
drop the BTs link as a result.
Change-Id: I6c5240710ef6d223651dfb4a8db939b5d2f974ca
Ramping down was set up with a target of -10 dBm, but then the code only
waited for all TRXs to be at least 0dBm, meaning that if operating more
than 1 TRX, the FSM could transit to state ST_WAIT_TRX_CLOSED when one
TRX reached -10 and other were already equal or below 0 (but not yet
-10). As a result, later on, when other TRXs reached -10 dBm they would
trigger EV_TRX_RAMP_COMPL which was not expected (no use) in
ST_WAIT_TRX_CLOSED.
Related: SYS#4864
Change-Id: If7af0b138efe78ec591c199a19fc22b304416a13
They were both half implemented but named differently, due to myself
adding them during the initial FSM implementation. This prevents
osmo-bts-trx sending a POWEROFF when OML link is dropped.
Related: SYS#4864
Change-Id: Ic2dab864b6d4075dfb9a1e4acfd9af013c9c46fe
How to reproduce:
* Configure a TS to be TCH/F_TCH/H_PDCH in osmo-bsc.cfg
* Run the network with osmo-bts-trx, then use osmo-bsc's "rf_locked 1"
* Then, unlock it: "rf_locked 0"
* The following assert will be hit:
Assert failed ts->dyn.pchan_is == ts->dyn.pchan_want /osmo-bts/src/osmo-bts-trx/l1_if.c:349
"""
(gdb) bt
#0 0x00007ffff5bb9355 in raise () from /usr/lib/libc.so.6
#1 0x00007ffff5ba2853 in abort () from /usr/lib/libc.so.6
#2 0x00007ffff6832361 in osmo_panic_default (
fmt=0x555555814e60 "Assert failed %s %s:%d\n", args=0x7fffffffc6e0)
at /libosmocore/src/panic.c:49
#3 0x00007ffff683249d in osmo_panic (
fmt=0x555555814e60 "Assert failed %s %s:%d\n")
at /libosmocore/src/panic.c:84
#4 0x000055555570fdf7 in trx_set_ts (ts=0x7ffff1e6bce8)
at /osmo-bts/src/osmo-bts-trx/l1_if.c:349
#5 0x00005555557133c1 in bts_model_chg_adm_state (bts=0x627000000160,
mo=0x7ffff1e0f8a0, obj=0x7ffff1e0f860, adm_state=2 '\002')
at /osmo-bts/src/osmo-bts-trx/l1_if.c:681
#6 0x0000555555769978 in oml_rx_chg_adm_state (bts=0x627000000160,
msg=0x633000003e00)
at /osmo-bts/src/common/oml.c:1044
#7 0x000055555576a8d3 in down_fom (bts=0x627000000160, msg=0x633000003e00)
at /osmo-bts/src/common/oml.c:1129
#8 0x0000555555770aed in down_oml (bts=0x627000000160, msg=0x633000003e00)
at /osmo-bts/src/common/oml.c:1476
#9 0x00005555557f8174 in sign_link_cb (msg=0x633000003e00)
at /osmo-bts/src/common/abis.c:188
#10 0x00007ffff73b5935 in ipaccess_bts_read_cb (link=0x6120000030a0,
--Type <RET> for more, q to quit, c to continue without paging--
msg=0x633000003e00)
at /libosmo-abis/src/input/ipaccess.c:980
#11 0x00007ffff73a1060 in ipa_client_read (link=0x6120000030a0)
at /libosmo-abis/src/input/ipa.c:72
#12 0x00007ffff73a2458 in ipa_client_fd_cb (ofd=0x62f000038a50, what=1)
at /libosmo-abis/src/input/ipa.c:136
#13 0x00007ffff67ebfa7 in osmo_fd_disp_fds (_rset=0x7fffffffdda0,
_wset=0x7fffffffde40, _eset=0x7fffffffdee0)
at /libosmocore/src/select.c:227
#14 0x00007ffff67ec38c in _osmo_select_main (polling=0)
at /libosmocore/src/select.c:265
#15 0x00007ffff67ec46b in osmo_select_main (polling=0)
at /libosmocore/src/select.c:274
#16 0x00005555557ef089 in bts_main (argc=7, argv=0x7fffffffe208)
at /osmo-bts/src/common/main.c:354
#17 0x00005555556fe621 in main (argc=7, argv=0x7fffffffe208)
at /osmo-bts/src/osmo-bts-trx/main.c:176
"""
Related: OS#4920
Change-Id: Ia3210e24b921fd0c67f77068b7ef4a65f270cd11
Waiting until all other TRX are provisioned before really sending
POWERON helps avoiding race conditions where TRX!=0 are not yet fully
configured at the TRX side before POWERON is called.
This solves for instance the situation where after POWERON RSP the BTS
started ramping up on all TRX while on some NOMTXPOWER RSP was yet not
received...
Related: SYS#4920
Change-Id: I906be4714807c7a2793971cb6062120e24337d7b
The state of each config required is now tracked through the "acked"
variables, this way the FSM can know when all configs are confirmed by
the TRX and can proceed to submit POWERON command.
With this version each TRX is still totally independent (there's an FSM
per TRX), which means POWERON can be sent on TRX0 before TRX!=0 are
fully configured. As a result, powe ramping may start before we know the
NOMTXPOWER of a TRX. This kind of issue will be fixed in next commit.
Related: SYS#4920
Change-Id: I1b736a4be5ce52a854f5767d8609153e1f4c08d9
With prior code state managing the TRXC side of osmo-bts-trx, there are
plenty o cases (race conditions) where things can go wrong/unexpected,
because there's really no infrastructure to wait and synchronize between
different TRXs (eg wait until all are configured to POWERON), or to
simply keep well known per-trx state regarding lower layers.
In order to fix in the future all of those issues and to sanitize
current code, a new per-trx FSM is introduced, which takes care of
submitting TRXC commands and waiting for response when needed to manage
the state of the TRX.
Related: OS#4364
Change-Id: I2a00c23df15840e33fbb232c9e1dd6db128f63f6
the RSL link has nothing to do regarding the state of the Radio Carrier,
as in it being up is not enough to have a working (enabled) Radio
Carrier.
Change-Id: Iefb5c4e1097233b5c31e4d621c544d51516af678
At that time we schedule a POWERON command towards osmo-trx, so let the
callback of RSP POWERON set the OPSTATE in l1if_poweronoff_cb rather
than setting it without waiting for confirmation from osmo-trx.
Change-Id: Ib36a073cae5e1522821a04d8806648562f4e0f5b
Move all struct gsm_bts_trx references from bulky gsm_data to its own
file containing all related definitions and implementations. Also move a
few functions clearly related to that object which were placed in bts.*
Change-Id: Iebaf5b221c48b571f45408af867ce6f9c0cd9f4a
commit d211c490ca avoided sending
GSMTAP packets on the virtual Um interface with type
GSMTAP_CHANNEL_UNKNOWN by relying on gsmtap_makemsg returning NULL.
But that's not the corect approach since it's totally fine to be sending
GSMTAP_CHANNEL_UNKNOWN on some GSMTAP cases (for instance when the
program fails to infer the type when decoding a message), since then
this way one can study pcap files and find the offending encoded
messages which failed to be decoded.
This patch goes togehter with revert patch introduced in libosmocore as
explained in the commit referred above.
Change-Id: I233afd930d3e43f7b120d40192c7c192102e38d9
bts.h refers to struct gsm_bts object, but we still had a bunch of stuff
in bulky gsm_data.* from old days. Let's move stuff where it belongs to
start clean up of gsm_data.
Change-Id: I0a4219e3f64f625ee8b364bf408b8d2bcc8085c5
Ramp down when BTS is administratevly locked, and ramp up when it
becomes unlocked again.
Af ramping down, bts_model_trx_deact_rf is called to make sure all
channels are released.
power_ramp_start() is dropped from inside bts_model_trx_deact_rf since
it's not the proper place. In there we simply want to instantaneously
drop RF.
Related: SYS#4920
Change-Id: Ib7a7b0a0c24779349f142215f0bb32b72c86ce70
This should provide a quick way to check if the system is frequently
overloaded over time and hence downlink FNs are scheduled later than
expected.
Change-Id: I0051b9ab18ebc9f92db11374d856de94f155efa4
I believe the modern compilers are smart enough to optimize the
outer (per-timeslot) loop of trx_sched_fn() in a way that TDMA
frame number is advanced after making sure that a transceiver
is powered on. However, it's still more perspicuous to check
availability of a given transceiver first.
Change-Id: I6a97000c1c84e36096e9ba378a489c82caa4cc5b
According to 3GPP 45.002, section 5.2.4, a frequency correction
burst is basically a sequence of zeros. Since br->burst is already
zero-initialized, there is no need to maintain and memcpy() another
sequence of zeros into it. Just set the length.
Change-Id: Ic4f6d550010da5caf4bc471ff1e184c9fab30c6d
In trx_sched_fn() we schedule Downlink bursts in advance, in order
to give the transceiver some time to process them. This function
handles all timeslots of all transceivers in a loop. The problem
is that the given frame number is overwritten on each iteration.
Let's say we have 4 transceivers, each with default fn-advance 20.
The given frame number N will be advanced 4 times, so the resulting
frame number for 4-th transceiver would be (N + 4 * 20) instead of
(N + 20) as expected. Therefore, all additional transceivers would
be served more and more in the future (depending on their position).
Change-Id: Ie3ab544eac81a675266df09cd2b7740e4183188e
There's a standarized way through OML's Administrate State to control
the status of TRX, so let's use and maintain that one rather than this
ad-hoc hack.
Related: SYS#4920
Change-Id: Ia7f190063c35e0ed8e2e734047b3aff608cd3ce3
Setting the phy link of a trx to SHUTDOWN sets operative state to
DISABLED, so we use operative state as a condition to know whether all
TRX are already powered off properly and we can exit.
Change-Id: I2bcd211d7edcc8486461a555d6c470a94b166ed7
Some backends like osmo-bts-trx require exchanging messages like
POWEROFF to close the TRX, and hence need some time. Switch the function
to expect result asynchronously by calling a callback.
This will be used later to wait until all TRX are really powered off
before exiting the process.
Change-Id: I7d76b600fc06e1114b35bf0c2d08eff5bbd1b69a
It makes more sense to first deactive RF on all TRX and finally close
them totally. This way we keep consistency between all TRXs and it's
easier for lower layers which may need to close them all at once. Also
in the event that we want to turn bts_model_trx_deact_rf to return
asynchronously.
Change-Id: Ib62358384e37a5cef692926439462042fab0138c
bts_model_trx_close is only called during bts_shutdown immediately after
bts_model_deact_rf, so its logic keeps being essentially the same after
this code movement.
On the other hand, bts_model_deact_rf is also called during RSL link
establishment if it failed for whatever reason in
bts.c:trx_link_estab(). In that case, we want to make sure the TRX is
not used so we need to implement bts_model_deact_rf.
Change-Id: Id4eae743da81773a04b82e7b454071b0cc66677a
Upon BTS shutdown (for instance because the Abis link against BSC was
lost), stop the operation in an ordered manner (cell soft lock). This
means slowly decrease tx power so that MS have time to handover to other
neighbour cells.
Related: SYS#4920
Change-Id: I70e34dda8974ebd94aea33bd9fb1d99f9063cc55
Using an FSM here will allow for more complex ordered shutdown
procedures, like power ramp down, waiting for TRX deact asyncrhonously,
etc.
Current commit leaves everything in place already prepared to implement
ramp down, which will be implemented in next commit in the series.
Related: SYS#4920
Change-Id: I8f48f17e61c3b9b86342eaf5b8a2b1ac9758bde5
Using the VTY command will force that value and prevent osmo-bts-trx to
use/send NOMTXPOWER cmd over TRXC.
Change-Id: I496753bc74767a7e18b831768d9d422a738192b7
Together with previous counter L1SCHED_TS_CTR_DL_LATE, it allows
understanding which dl blocks are really lost (never queued) and which
were simply queued too late.
Change-Id: I456d0cfbef1e03b147ce7d968a3ec42dd728fe74
Old _shared one comes from time where we shared header with other
componenets. It's no longer the case sine a logn time ago.
The gsm_data_shared.h is only being included by gsm_data.h nowadays, so
let's simply merge it to simplify header dependency and struct
definitions.
Similarly, gsm_data_shared.c is renamed to gsm_data.c
Change-Id: Id60e7582e3a32dbc5e3531b87b2b49f07aee734d
We should always expect the msgb queue to be ordered by FN, so there's
no use in continue traversing the queue after we found a later primitive
than the one at current time, since next onews will be even more in the
future.
Change-Id: If57fc3d89a74e6cbc79fce80dae7bf4f77e9364d
According to 3GPP TS 08.58, section 9.3.4, BS Power IE indicates
the transmission power attenuation on a particular channel:
+--------------+---------+-----------------+
| Reserved (3) | FPC (1) | Power level (4) |
+--------------+---------+-----------------+
so let's change handling of this IE as follows:
- s/bs_power/bs_power_red/g, so it reflects 'reduction';
- store power attenuation value in dB, not in 2 db steps;
- get rid of ms_power_ctrl.bts_tx_pwr, it's always 0 anyway;
- fix rsl_tx_meas_res(): use lchan->bs_power_red;
- always check if FPC (Fast Power Control) flag is set;
- we don't support it, so reject messages containing it;
- fix rsl_rx_chan_activ(): properly apply the bitmask.
Change-Id: I16cc50dfca102030380a06e16c234d5f6698f38f
For those osmo-bts-trx specific logical channels with a generic
logical channel state associated, let's finally apply the BS Power
reduction (attenuation) value that was received from the BSC.
Change-Id: Ib692ff1a75a80fceccb481839c8514d4b2a547b9
This change simplifies access to generic logical channel state
(struct gsm_lchan) from osmo-bts-trx specific state (struct
l1sched_chan_state), so there is no need to look it up using
get_lchan_by_chan_nr() on receipt of each Uplink burst.
Change-Id: Ic4378020f980845b962f71b9e4b7faea738bc174
This change is similar to what we did for Uplink bursts:
- group all Downlink burst parameters into a single structure,
- allocate it once and pass a pointer to lchan handlers,
- pass a pointer to trx_if_send_burst().
Given that the structure is allocated and (zero-)initialized in
trx_sched_fn(), we can get rid of some memset() calls in lchan
handlers and thus improve the overall performance a bit.
Change-Id: If3014e69746559963569b77561dbf7b163c68ffa
It's easier to maintain the logical channel handlers in separate
files, rather than in a huge one (scheduler_trx.c, ~2k lines).
Change-Id: Ie5663fd90596b4800a4546675a323250bbb24c80
Since we are returning the pointer, it should always be grabbing a
reference (find doesn't do it).
In practice it's not much important since it is always created and not
found.
Change-Id: Ib84636663be2df33d497131c780b010b57f17e32
If for whatever reason (eg fn-advance too small) there's no burst
available for a PDCH TS where EGPRS is enabled, a dummy burst of size GSM_BURST_LEN
would be selected in _sched_dl_burst(), but the nbits length would still be set to
EGPRS_BURST_LEN above by func() pointer (tx_pdtch_fn()).
As a result, trx_if_send_burst() would later read EGPRS_BURST_LEN from the
dummy burst of size GSM_BURST_LEN.
The issue was found by ASan. See OS#4606 for more info.
Fixes: OS#4606
Change-Id: Iba6ccceed5c0f1db810259768678f174d39cbf8b
it was perceived that sometimes based on order of events (OML attr setup
and timing of RSL connections, etc.), the NOMTXPOWER for TRX!=0 can come
after the RSP POWERON, and hence the target power level for TRX!=0 is
not done correcty. This can be seen by running any test using the
ttcn3-bts setup of docker-playgrounds.git.
Change-Id: I2ec8dba61393be6edfab9e7e478e096e2d0933ad
The nominal transmit power is still only configurable manually from
osmo-bts-trx VTY interface. Support to retrieve the nominal power
from osmo-trx will come later.
Change-Id: Ia7c353e4c199e0fc3bcab55c45a4abda2c66d2c1
It's not something useful to see unless someone's really debugging that
part, and it shows up quite frequently.
Change-Id: I3c0dee36c7d34e6b1341b517ce3bcd1b275e69c1
Looking at GSMTAP during handover, I've noticed many packets on
RACH looking pretty much like false positives, all with RA=0x00.
I correlated GSMTAP traces with TRXD traces, and figured out
that they all are triggered by NOPE indications from osmo-trx.
Since a NOPE.ind carries no valid burst, all its bits are set to
zero. Funny enough, this sequence is still decoded just fine as
a valid RACH, so that's why we see it on GSMTAP. Later on it
gets rejected by L1SAP due to bad RSSI, ToA, and/or C/I ratio.
The is a side effect of [1]. In order to ensure proper Uplink
measurement reporting during handover, including the time
before the handover RACH is received, let's treat and handle
NOPE indications as Normal Bursts.
[1] Ice45d5986610d9bcef2a7e41f0a395ec779e3928
Change-Id: Ic69f3bc2b776a23374c28a6884080a54bc16ef5f
Related: OS#4592
It was a very bad idea to mix "public" BTS features, that are
reported to the BSC via OML, and those features, that are used
locally (and exclusively) in osmo-bts.
Why? At least because we already have the BTS feature manipulation
API in libosmocore, that is used by osmo-bsc, but for some reason
not by osmo-bts. New features added to libosmocore would clash
with the existing "internal" ones like BTS_FEAT_MS_PWR_CTRL_DSP.
So what this change does can be described as follows:
- remove duplicate definition of the "public" features,
- use libosmocore's API for the "public" features,
- separate both "internal" and "public" features:
- the "public" features continue to live in bitvec,
- the "internal" features become flags,
- s/BTS_FEAT/BTS_INTERNAL_FLAG/g.
Change-Id: Icf792d02323bb73e3b8d46384c7890cb1eb4731e
EGPRS support, in particular MCS channel coding, was introduced
to osmo-bts-trx years ago, but we still report that it's not
supported. Let's stop confusing BSC, and set this feature too.
Change-Id: Iaf92764d266e12efd2350967deffae50fbbb3b9e
An additional octet is only needed if total number of features
cannot be devided by 8 without the remainder. Fix this.
Change-Id: Ie501e5a635493830e0597f7b2fa287b6448e660d
This makes use of the newly-introduced lapdm_channel_init3() API,
which provides the user (BTS in this case) to provide a human-readable
string identifier for each LAPDm channel. This identifier is
subsequently used in all related log lines to provide context.
This means we will now get context information about which specific
SAPI in which sub-channel (ACCH/DCCH) on which lchan/ts/trx/bts a given
message originated from.
Example:
DLLAPD <0011> lapd_core.c:829 ((bts=0,trx=0,ts=0,ss=0)[DCCH][0]) SABM(E) received in state LAPD_STATE_IDLE
Change-Id: I17e3d4797ec71e31d0775330ae36d2e1fd70423f
Depends: libosmocore.git Ie6742843fff809edffcac24c4dce4edf66bc71be
Related: OS#1938
- get rid of gsm_lchan::mr_bts_lv, it's never used anyway,
- check IE length in amr_parse_mr_conf() before parsing,
- check return code of amr_parse_mr_conf().
Change-Id: Ibfd5845ea429945b352dd14421e86562998d65ca
This value will be soon acquired automatically by osmo-bts-trx by asking
over TRXC to new versions of osmo-trx which is the nominal tx power for a given trx.
However, to still be able to work correctly against older versions of
osmo-trx or other TRX implementation (older or current) not supporting
this new TRX comamnd, let's allow the user to force a given value
through VTY for Tx power to work correctly.
Change-Id: Ib1b6f80d3b54afc42db9d358a79582cc619c6ce4
Accidentally noticed this typo while working on osmo-bsc:
DNM ERROR abis_nm.c:525 BTS0 reported unknown variant
'omso-bts-trx' (expected 'osmo-bts-trx')
Change-Id: I45b0fb7b940ee4267e6ee315d18e5b95c9231894
Related change in libosmocore will let gsmtap_makemsg return NULL if the
channel type is unknown: Ib4147a33a75c3cf425c30da8b0678c7fba8a371d
Related: SYS#4822
Change-Id: Ic22ab71e520ab44429a93724250d349d16250801
The amount of SUB frames that may occur in AMR is not fixed, nor can it
be determined by some formular or lookup table. The reason for this is
that the DTX period may negotiated dynamicly. This means that the lower
layers must make the decision if an AMR sub frame is a SUB frame early
and tag the repective measurement / frame they hand up to the upper
layers accordingly. However, regardles of the occurrence of DTX periods
the amount of SUB frames in AMR must be always 1 or more because SACCH
frames always count as SUB frames as well. Lets make sure that this is
respected in the debug log as well as in the logic that tries to
substitue missing SUB frame measuremnets.
Change-Id: I1fd91b576ff7274caa6d4356bcd7a4fa4311219d
Related: OS#4465
This redundant call to msgb_put() appends five '00'O octets to the
"Software Activated Report" message, so they look like an unknown
attribute(s). I accidentally noticed this in Wireshark.
Change-Id: I7377575135f4a154572891d1b5b39ff814b97f38
New define is available since libosmocore 1.1.0, and we already require
1.3.0, so no need to update dependenices.
Let's change it to avoid people re-using old BSC_FD_READ symbol when
copy-pasting somewhere else.
Change-Id: Id51ccb2c273c5f0fa4986f28bbd69a72d2dbaa0e
A debug line is printed whenever a measurement is added and it also
displays if the added measurement is a sub frame or not, lets display
all the other properties too, especially inv_rssi would help a lot as it
shows us the rssi values which are reported by the lower layers
Related: OS#2978
Change-Id: I0299b75e99661e8dd22ad6604a897db4533c3b2b
== How to reproduce?
phy 0
instance 0
dsp-trace-flag error
dsp-trace-flag debug
== What happens?
Program received signal SIGSEGV, Segmentation fault.
0x432dbe64 in strcasecmp () from /lib/libc.so.6
(gdb)
(gdb) bt
#00x432dbe64 in strcasecmp () from /lib/libc.so.6
#10xb6ed69ec in get_string_value () from /usr/lib/libosmocore.so.12
#20x0001bcf0 in cfg_phy_dsp_trace_f ()
#30xb6fc1080 in ?? () from /usr/lib/libosmovty.so.4
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
Change-Id: I23137930f81bfa8adbb62828f341470c11202b5e
The function ts45008_83_is_sub rougly decides if a frame is a SUB frame
or not. This works by checking the frame number against against lookup
tables. This works fine for codecs where the occurrence of SUB frames is
fixed. However for AMR this is not the case as the DTX periods are
dynamic. Here it is the responsibility of the lower layers (phy,
frame decoding) to tag SUB frames early since making the decision later
based on the frame number is not possible.
The parameter is_amr_sid_update was probably added as a placeholder. It
is set to falls by the callers of the function. Lets remove this
parameter as a late decision if an AMR frame is a SUB frame will never
work.
Change-Id: I125d5ff592218a9e98130a6a7b6bbc6378ce4132
Related: OS#2978
Currently we do not detect any of the DTX frames (SID_FIRST, SID_UPDATE
etc.) Detecting and tagging those frames as is_sub is important for
measurement processing. Also the RTP marker bit must be set on each
ONSET frame.
- Add detection of DTX frames
- Tag DTX frames as is_sub and set frame type to AMR_SID
- Set RTP marker bit when ONSET frames are received
Change-Id: I5afe730fff2fa3199a5913b0de4f5c7b23a39f31
Depends: libosmocore I2bbdb39ea20461ca08b2e6f1a33532cb55cd5195
Related: OS#2978
Many hardware parameters of the LC 1.5 were not exposed to the user.
This change introduces most of the features, being very similar
to osmo-bts-oc2g code. Mostly based on commit
653e974fec00414ba85baf258ccc46ea778a53bd from NuRAN's osmo-bts fork
at: https://gitlab.com/nrw_noa/osmo-bts
Change-Id: Ib16e7d423fc7030573acd86fbd356ae96697ed5d
/usr/bin/ld: /home/laforge/projects/git/osmo-bts/tests/sysmobts/../../src/osmo-bts-sysmo/tch.c:584: undefined reference to `femtobts_tch_pl_names'
/usr/bin/ld: l1_transp_hw.o:/home/laforge/projects/git/osmo-bts/src/osmo-bts-sysmo/femtobts.h:108: multiple definition of `pdch_msu_size'; main.o:/home/laforge/projects/git/osmo-bts/src/osmo-bts-sysmo/femtobts.h:108: first defined here
/usr/bin/ld: l1_transp_hw.o:/home/laforge/projects/git/osmo-bts/src/osmo-bts-sysmo/femtobts.h:71: multiple definition of `femtobts_l1prim_type'; main.o:/home/laforge/projects/git/osmo-bts/src/osmo-bts-sysmo/femtobts.h:71: first defined here
see also: https://alioth-lists.debian.net/pipermail/debian-mobcom-maintainers/Week-of-Mon-20200413/000651.html
Change-Id: I4a9896153876fcda496365776883827746205f00
some of the log categories in logging.c are set to LOGL_INFO or even to
LOGL_DEBUG. This is too verbose. Lets set those categories to
LOGL_NOTICE. Also the BTS manager programs (...bts_mgr.c) use LOGL_INFO
by default. This should be set to LOGL_NOTICE as well
Related: OS#2577
Change-Id: I6e7a635f9b4a93529661dafc591d512d7b7e8c75
When a NOPE indication is received from the TRX normally a separate
handler (.nope_fn) is called. It turned out that calling the Uplink
handler (.ul_fn) on NOPE indications is the usual case, so let's
remove the .nope_fn member and call the Uplink handler directly.
Since a NOPE.ind comes without burst bits, the Uplink handlers must
check bi->burst_len to avoid uninitialized memory access. For some
logical channels (in particular RACH, PDTCH/U, and PTCCH/U) it does
not make sense to call the Uplink handler, so we ignore them.
Change-Id: Ice45d5986610d9bcef2a7e41f0a395ec779e3928
Related: OS#4461
According to 3GPP TS 44.004, section 7.4a, two alternative RACH
block formats are specified: 8 bit (1 octet) and 11 bit. The
bit order is little-endian (right to left).
In L1SAP PH-RACH.ind structure (see ph_rach_ind_param) we use
a field of type uint16_t to store RA values regardles of the
block format. Thus when packing it to bytes, we cannot just
cast uint16_t* to uint8_t*, we need to do some bit shifting.
Change-Id: I0e91d825bb2e1897647dd5403c311d833a89ff2e
Send test failure event report OML message to the BSC. I found this
useful while manually testing related handling code in OsmoBSC.
Related: OS#1605
Change-Id: I0c4eba1636d8faf5012db26643bdf1d9fb6bfa1e
Without using the NOPE indication it might happen that we get
into the following situation:
* bursts 0,1,2 of a given block are received
* burst 3 is lost on the radio interface, OsmoTRX sends NOPE
* osmo-bts-trx doesn't pass the NOPE the the rx_tch*_fn()
* we never detect the end of the block, never perform decoding
and even if the burst could be fully decoded, we loose the block
Related: OS#4661
Related: OS#2975
Change-Id: Idfc5c9a23db808c5f87ef5646c7e1d1cd3127371
Without using the NOPE indication it might happen that we get
into the following situation:
* bursts 0,1,2 of a given block are received
* burst 3 is lost on the radio interface, OsmoTRX sends NOPE
* osmo-bts-trx doesn't pass the NOPE the the rx_tch*_fn()
* we never detect the end of the block, never perform decoding
and even if the burst could be fully decoded, we loose the block
For voice, it can lead to lost RTP frames in uplink, which is also
problematic.
Let's deal with burst_len=0 in rx_tch*_fn() and use it as nope_fn.
Closes: OS#4661
Related: OS#2975
Change-Id: I0fbf4617daf24bd8aecfd9cfe1efd66cf73a277a
This fixes a regression introduced in I710d0b7cf193afa8515807836ee69b8b7db84a84
We (obviously!) cannot compute the BER before performing convolutional
decoding.
Change-Id: I4e57f45d49cb513e4843e56f50c8de6980958fdc
Related: OS#2977
Related: OS#4667
The VTY option to bind the virtual Um multicast to a specific
network interface has existed ever since osmo-bts-virtual was
first merged to the repo. However, embarrassingly, until today
it never did anything, i.e. the code to actually perform the bind
was missing.
Depends: libosmocore.git Ib52d22710020b56965aefcef09bde8247ace4a9c
Change-Id: I303f2e616d2d32b5a8005c3dcf0f5fad19ad3445
Related: OS#2966
This can be used to determine the multicast TTL packet and hence
how far the packet will propagate in the network. If you want to
operate the virtual Um only on your own machine, a TTL of 0 would
prevent the packets from ever being transmitted on your local
ethernet segment.
Change-Id: I18a9f93b764aee4e1dc68a1c6ac4d078e52ca61d
Related: OS#2966
GSMTAP_CHANNEL_VOICE is the mechanism by which GSMTAP can [finally!]
be used to transport circuit-switched voice codec payload, and not
just signalling.
Original patch by Neels Hofmeyr, heavily extended by Harald Welte.
Depends: libosmocore.git I952044a17334f35712e087dc41781805000aebc1
Change-Id: I1cd9a251ce0b87181a0822d7940bbfc9f1428543
In l1sap_ph_data_ind() we can use msgb_pull_l2() which is an exact
implementation of the functionality there.
In l1sap_tch_ind(), the existing code is actually wrong by making the
assumption that the msgb contains exactly an entire osmo_phsap_prim.
Better to also dynamically compute the number of bytes to ensure
we only pull those ahead of the L2 header, no matter what their exact
count.
Change-Id: I13f7f8ba93795e40b1fb4a306fe765e059f642cf
During the process of bootstrapping, it may happen that System
Information Type 3 is not yet received from the BSC, while the
BTS already needs to transmit a block on AGCH or PCH.
Since the RSL link is established later than the OML link, it's
kind of expected, so we should not log it as error.
Change-Id: I41aa3dbe375cf42c39032bafa80dba94d6219d35
osmo-bts-virtual uses GSMTAP over multicast groups to communicate
with one or more virtphy instances. There are some well-known default
multicast groups, but those can also be overridden via the VTY.
The problem is: If you actually try that, osmo-bts-virtual will abort,
as we try to talloc_free() when using osmo_talloc_replace_string()
on the constant default string.
The proper solution is to talloc_strdup() the constant default string
when setting the default value in bts_model_phy_link_set_defaults().
Change-Id: Ia96fea891a22e5a3c47ce658eda130ba8d4fc411
For osmo-bts-sysmo the MPH INFO MEAS IND indication is still sent
separately. Lets merge the measurement information into the PH DATA
Change-Id: Iffe7865727fbf9bca8eb32a96e8ea05cf718a948
Related: OS#2977
The struct members ber10k, ta_offs_256bits and lqual_cb in ph_data_ind
are only populated when the pcu_direct flag is not set.
The pcu_direct flag is set when the pcu is directly attached to the phy
and all pcu related traffic (pdtch) is handled without sending it through
osmo-bts-sysmo. For those cases osmo_bts_sysmo will not make use of
those struct members, even if they were populated. When the PCU is not
directly attached the data is needed because it is sent through the
pcu_sock to the PCU.
Lets remove the check because it is not required. Also in future patches
where measurement indications and data / tch indicatins are merged the
struct members are also needed to carry the measurement information for
SACCH as well.
Change-Id: Iaa37bb62af4f5eb4b6e684cb754e68d11e6fd676
This line appears tens of times per second when a call is ongoing,
making it impossible to follow logs on INFO level.
Change-Id: Iadb1baf55df2f6d96f85260f2e8d03627fef7e66
Some use LOGPC, but were used after a LOGP with a trailing newline.
Let's simply add some defines/macros to be able to include it into a
normal LOGP easily insted of having a function.
Change-Id: Ie082b11c9d6d00ff2206184f03f6e3647c3da18c
src/osmo-bts-sysmo/Makefile.am:25: warning: bin_PROGRAMS was already
defined in condition TRUE, which
includes condition ENABLE_SYSMOBTS_CALIB
src/osmo-bts-sysmo/Makefile.am:10: ... 'bin_PROGRAMS' previously defined here
Change-Id: Ib2334dccefd507eaaa6d33e58d4c1e029d7fd540
The MPH INFO MEAS IND indication, which contains the uplink measurement
data is sent in parallel to the PH DATA and TCH indications as a
separate indications. This makes the overall uplink measurement data
processing unnecessarly complex. So lets put the data that is relevant
for measurement into the PH DATA and TCH indications directly.
This change only affects osmo-bts-trx at the moment. In order to keep
the upper layers (l1sap.c) compatible we add an autodection to switch
between separate measurement indications and included measurement data.
Related: OS#2977
Depends: libosmocore I2c34b02d329f9df190c5035c396403ca0a4f9c42
Change-Id: I710d0b7cf193afa8515807836ee69b8b7db84a84
The variable irssi_full_sum is not populated with a dummy value when we
are not able to compute irssi_full_sum. Instead we mistakenly write
MEASUREMENT_DUMMY_IRSSI to ber_full_sum, which is wrong
Change-Id: I44d7cb48e3c68ab1b48c78cceb9381ce3e39d7e8
Related: OS#2987
The timing advance controller that is implemented in loops.c of
osmo-bts-trx only works for osmo-bts-trx and not for any of the phy
based bts. Lets move the timing advance controller into the common part
and make it available for every bts. Also lets add a unit-test.
Change-Id: If7ddf74db3abc9b9872abe620a0aeebe3327e70a
Related: SYS#4567
Due to relatively small training sequence of Access Bursts, there
can be frequent false-positives (basically noise). Fortunately,
we can distinguish them from the real Access Bursts by checking
the signal measurements attached to them (BER, ToA and C/I).
Let's reduce verbosity of logging messages as they are mostly
useful for debugging and may confuse the users / operators.
Change-Id: I7ab6727ffff00140a7f9e762b299b711481393f1
rsl.c: In function ‘rsl_rx_ipac_XXcx’:
rsl.c:2147:39: error: ‘%s’ directive output may be truncated writing up to 255 bytes into a region of size 28 [-Werror=format-truncation=]
2147 | snprintf(cname, sizeof(cname), "bts@%s", ipstr);
| ^~
rsl.c:2147:3: note: ‘snprintf’ output between 5 and 260 bytes into a destination of size 32
2147 | snprintf(cname, sizeof(cname), "bts@%s", ipstr);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Change-Id: Id982a814f401e304327d25c77666f039bc156c1f
The variable ta256b_sum is int32_t and num_ul_meas_actual is unsigned
int. When ta256b_sum is negative the division produces the wrong result.
This is beacuse the division is performed unsigned as the usual
arithmetic conversions promote to unsigned where both both operands are
the same width.
Lets fix this by casting num_ul_meas_actual to signed.
(Note that in the same function there are various other averages
computed in the same pattern, but they have unsigned operands and so are
correct.)
Related: SYS#4728
Change-Id: I37e3f69109c5ca2948bd4cdb7aa017bf2fcb8172
When a bad SACCH frame is received the processing of the frame is ended
early and lchan_ms_pwr_ctrl() is not called. This means that the power
control loop does not get informed about a situation where the signal
level is very weak and increasing the ms power would make sense. In
order to ensure that the power control keeps working on lost SACCH
frames, lets call lchan_ms_pwr_ctrl() with the current RSSI and the
requested (BSC) power setting.
Related: OS#4281
Change-Id: I4fb85754b1a69376b02da7f4b175c6e8ec9cc35c
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
osmo-bts-trx used to have its own (low-level) MS Power Control loop,
but recently it has been ripped out. Since [1], the process fails to
start if the configuration file still contains 'ms-power-control dsp'.
Let's be more tolerant: override 'dsp' by 'osmo' and print a warning.
[1] I49706926b1e962b18791174627bc3cc0cd0cd9d5
Change-Id: I4facd21bca3d8cb80d21e83ea267bc013e474533
Rename some variables so that:
* Variables containing power control levels end up with "_lvl".
* Variables containing power levels end up with _dbm.
* Move old current_dbm var to be ms_dbm, to match its power control
level counterpart ms_power_lvl, and add current_dbm to match its
counterpart ns_power_ctrl.current.
Now that variables are more clear, it also becomes clear that old "diff >
0" condition, apart from difficult, was currently wrong, since in order
to print the raise/low verb we want to compare between old and new
values, not between received and new values. Let's fix that in this same
commit.
Change-Id: I4e279a6b93fbcc5da25bf8c9213310939fd493ce
Simplify when the fixed field is set in rsl_rx_chan_activ.
Comment talks about enabling autonoumous control loop, but it is
actually describing it when disabling it, which is confusing.
Change-Id: Id6b444a33ab062f6dab11a0ce62d8aecaea87591
When logging about filtering access bursts, let's indicate if this is
on a CCCH, PDCH or handover related.
Change-Id: I03f21f2b54cbe5aad36ac71a614d5df98867df80
This way it's much easier to introspect the library internal
talloc allocations from the VTY interface.
Change-Id: Ic8d9fc7ce3da8abf0ea73d2b20366133cd801c37
Let's drop it instead of having code duplication from common code in a
lower layer, and maintain only the one in l1sap for all BTS models.
As a result, osmo-bts-trx loses feature BTS_FEAT_MS_PWR_CTRL_DSP and
will only be able to use "ms-power-control osmo" in VTY, which will be
enabled by default (meaning: change of behavior, now MS Power Control is
enabled by default in osmo-bts-trx and can only by disabled by BSC).
Old bts-trx specific VTY command "(no) osmotrx ms-power-loop" is marked
as deprecated but still working for more usual case (1 TRX configured)
to avoid breaking backward compatibility.
TA low level loop is still kept in loops.c and will be moved to l1sap at
some point too.
Related: OS#1851
Change-Id: I0d8b0c981d9ead91d93999df6e45fb06e426aeb9
On an ARM toolchain:
scheduler_trx.c:294:3: warning: format '%ld' expects argument of type 'long int', but argument 10 has type 'int'
Let's cast it to long int to make sure correct size is applied in all
platforms.
Change-Id: I701b3dbc4e84db21cf02305d374b0df731e70313
Since there can be multiple PDCH channels configured on different
timeslots, different TRXes, and BTSes, the PTCCH/U handling code
in OsmoPCU needs to know the exact origin of a given RACH.ind.
Otherwise, it is not known which subscriber originated a given
PTCCH/U indication, and hence it is impossible to send PTCCH/D
Timing Advance notification properly.
Fortunately, we can extend the RACH.ind message without even
bumping the protocol version, because every single PDU has a
fixed size defined by the largest message - INFO.ind. In case
if the actual message payload is smaller, the rest is filled
with a constant padding byte (0x00).
Older versions of OsmoPCU will consider the new fields as padding,
while the messages from older OsmoBTS versions will always have
both fields set to 0x00. Since C0/TS0 cannot be configured to
PDCH, this can be easily detected on the other end.
Change-Id: Iff38934a108b6b1cd298669834263a7d5296c3f6
Related: OS#4102, OS#1545
It's not a good idea to request big changes in MS Power based on
sporadic bad signal received, let's instead change announced MS power
levels more smoothly to avoid possible big signal strength fluctations,
similar to what is already done in osmo-bts-trx specific loop (loops.c).
Related: OS#1851
Change-Id: Iecc4ec7e21471ec853ad2d5659af4052aba5444c
Use instead the received MS Power currently in use by the MS matching
the measured signal. This way there's no need to wait for the MS to
reach the announced MS power level or add checks in case the MS doesn't
support that specific power level. Furthermore, more fine grained
announced power level value can be obtained faster due to more input
iterations not being dropped while waiting.
osmo-bts-trx specific algo was not following this approach and using
announced MS power instead because it's wowrking at a lower level and
henche was not using the transmitted MS Power level value by the MS as
input for the calculation.
The "if (diff < 2 && diff > -2))" condition is dropped since equal
signal strength may still result in a different MS power level announced
(the one currently used by the MS during tx of last SACCH block).
Related: OS#1851
Change-Id: I4494dc27a295a3dca1d3331d4ff712d486643e13
There is theoretical risk that when calculating the BER that a division
by zero occurrs. Lets add a check to avoid n_errors / n_bits_total when
n_bits_total is zero.
Change-Id: I1c0731b9a60be4b8c0c84b85b4403168120ceacd
Fixes: CID#205696
A NOPE.ind indicates absence of an Uplink burst, thus it does not
carry a burst. Let's init the burst length to avoid uninitialized
memory access in the scheduler code.
Change-Id: I77f686bf7df385215892e71733a28ff0d90d7222
Fixes: CID#205857
Each logical channel can now optionally have an additional handler,
that will be called when a NOPE / IDLE indication is received from
the transceiver. The aim of that handler is to keep the logical
channel state updated in case if one or more Uplink bursts are lost.
Change-Id: I71c552f44c25e56e9779d8b8ef5d4de9f8475637
Related: OS#3428
It indicates whether BTS model supports managing an MS Power Control
Loop over HW/DSP instead of using the software based osmocom algorithm
present in osmo-bts.
osmo-bts-trx own loop implementation is considered to be a "DSP/HW" one
since it acts on lower layers and interferes with osmocom algorithm
since it controls the same end variable "lchan->ms_power_ctrl.current",
this way we make sure both aren't enabled at the same time.
Old behavior in kept: if common upper-layer algo is not enabled
explicitly in VTY (ms-power-control osmo) and bts-trx specific lower
layer algo is neither enabled (osmotrx ms-power-loop <xyz>), then no
power control is done at all.
Related: OS#1851
Change-Id: I49706926b1e962b18791174627bc3cc0cd0cd9d5
Several improvements have been made lately to MS Power Control loop from
osmo-bts-trx in loops.c. Let's port these to the common algorithm.
Related: OS#1851
Change-Id: I579967cc8bb69dc76a315c6c9d3a351f5961d92f
The affirmation written there is not true, since actually it depends on
the band. For instance, for DCS1800 the maximum MS power is provided by
class 3. Let ms_pwr_ctl_lvl() take care of campling instead.
Change-Id: I744e7c315b818a1e7d3dd2579cd483c693d89b73
Make it clear that it contains the maximum MS power level (TS 05.05) and
not the one to be used. The one aimed at is in ms_power_ctrl.current.
Since it's used in related code, move it inside the ms_power_ctrl struct
too.
Related: OS#1851
Change-Id: Ib264ec7dac87355cef6415461ed74bd8e9c8ca52
Thies field is used to store and retrieve whether MS power needs to be
calculated and updated by osmo-bts software or autonomously by lower
layers. Previous name was not clear
and may have been understood as indicating whether MS Power Control loop
is done or not in general, and the responsible for that is located under
lchan's ms_power_ctrl.fixed.
Related: OS#1851
Change-Id: Ic690ab69866a7377f1597e24aa7b0214831c1cbe
Some bands, such as DCS1800, contain power levels such as 29, 30 and 31 not following same
unified sequence other power levels follow regarding conversion to dBm
values.
This makes extremly complex and prone to error comparing different power
levels. Let's instead use dBm values to calculate and crop desired new
value, and then convert it back to TS 05.05 ms power control level
value.
With this commit the control loop should be able to manage correctly the MS power
levels explained above.
Related: OS#4244
Change-Id: I0160637c5ffa606ee3081ad30be8e6f2a42b725b
Otherwise older ms_power value will be kept and used as a maximum.
From TS 08.58 sec 4.8 "MS power control":
"""
If power control is supported by BTS and it is to be used,
this is indicated by optional parameters in the MS POWER CONTROL
message (or the CHANNEL ACTIVATION message). Based on the
measurements performed on the uplink, TRX then attempts to keep
the power control parameters within the limits set by the
MS POWER CONTROL message (or by the CHANNEL ACTIVATION message).
"""
Change-Id: I0583eef477c33279ee5bfcda80141f365413a276
Make sure the variables n_errors, n_bursts_bits, n_bits_total are always
initalized. For example in rx_tchh_fn() the value for n_errors is
defined in a switch statement, where the default lets n_errors
uninitalized, which is in that particular case a theoretical problem,
however, lets make sure that the variables n_errors, n_bursts_bits and
n_bits_total are always initalized with 0
Related: CID#205452
Related: CID#205451
Change-Id: If28ea11cc111c7d73ca47b25e65ce399e5baa4c1
When sched_compose_tch_ind, sched_compose_ph_data_ind or l1if_process_meas_res
is called from rx_tchf_fn or rx_tchh_fn the frame number of the beginning of
the block is required. At the moment this frame number is calculated
wrongly using strange formulas. Lets use gsm0502_fn_remap() to calculate
the beginning of the block properly
Change-Id: I37601ddd85e4287dd9e41ad4a8cb7d314de1a83d
Depends: libosmocore I3d71c66f8c401f5afbad9b1c86c24580dab9e0ce
Related: OS#3803
This is similar commit to Ifda92155bd9c277ac150a327a7ab63c854087788,
which previously fixed same issue for osmo-bts-trx specific power
control loop code.
TS 48.058 sec 4.8 MS power control:
"""
TRX then attempts to keep the power control parameters within the limits
set by the MS POWER CONTROL message (or by the CHANNEL ACTIVATION message)
by changing the MS Power Level field of the L1 header sent to MS in each
SACCH block.
"""
Should fix TTCN3 BTS_Tests.TC_rsl_ms_pwr_dyn_max for non-bts-trx BTS
models.
Related: OS#1622
Change-Id: I376b52d7bee44132993a69cf532bd418171d0ca2
TS 48.058 sec 4.8 MS power control:
"""
TRX then attempts to keep the power control parameters within the limits
set by the MS POWER CONTROL message (or by the CHANNEL ACTIVATION message)
by changing the MS Power Level field of the L1 header sent to MS in each
SACCH block.
"""
Fixes TTCN3 BTS_Tests.TC_rsl_ms_pwr_dyn_max
Change-Id: Ifda92155bd9c277ac150a327a7ab63c854087788
All other Uplink burst handlers print frame number of the last
(currently received) burst. Let's make rx_data_fn() consistent.
Change-Id: Ie5762a132326be3ef4e4e38cc126f05d51098a20
Make it obvious for compilers and for coverity, that the sapi value used
to shift a bit for the sapi_mask is always <= 31. The sapi value is an
index of the value string l1sap_common_sapi_names, which has 24 entries.
Fixes: CID#205067, CID#205068
Change-Id: Id8be0ab67479b1f76a4f624bd3a5242e4fe59f4b
Change uint8_t sapi to int, so we can properly assert on errors from
get_string_value().
Fixes: CID#205066, CID#205069
Change-Id: I4d30afacfab93051868ae8f462cee9ad3dbc7fd0
Before this patch, if due to whatever reason the TRX started fine (RSP
POWERON 0) and sockets were created but no CLOCK IND was ever received
by the BTS, it wouldn't notice since the timerfd timeouts
(bts_shutdown("no clock")) are only checked after the first CLOCK IND is
sent by the TRX.
As a result, the BTS would be kept on forever saying everything is fine
but it would be sending no DL burst at all to the TRX (tested with a
modfied osmo-trx dropping clock indication).
With this patch, new APIs are added to indicate the scheduler_trx code
the timeframes where clock ind are expected (between RSP POWERON 0 and
RSP POWEROFF 0); if TRX sends clock indications out of that timeframe,
BTs lower layers will drop them (controlled by "powered" bool).
Hence, the scheduler_trx can now place a timeout (reusing same timerfd
because its new use is exclusive in time with its other previous use)
when it is told that CLOCK IND should start appearing, and if none
arrives in considerable time, then the BTS can be shut down to notify
the rest of the network.
Related: OS#4215
Change-Id: Iba5dbe867aff10e70ec73dbf1f7aeeecb15c0a4d
Add a new common L1 SAPI enum, to unify all the BTS specific SAPIs.
Translate to this enum, and set the context for uplink messages in
each BTS specific implementation.
Set the context for downlink messages in the common l1sap code, by
converting the osmo_phsap_prim back to the SAPI value (mostly looking at
chan_nr). The new functions for doing this conversion,
get_common_sapi_by_trx_prim() and get_common_sapi_ph_data(), are based
on the existing to_gsmtap() and gsmtap_ph_data() functions.
Note that we can't set the uplink SAPI context in the common code,
because then we can't set it as early as possible. In this patch, the
SAPI context is set for the PHYs where the SAPI is readily available.
With additional conversion from the RSL channel, the SAPI context could
be set for osmo-bts-trx in a follow up patch.
Related: OS#2356
Depends: (libosmocore) I814cb3328d99faca9220adb5a80ffb934f219d7d
Change-Id: I6b7bb2e1d61502b61214f854a4ec5cbb7267545b
We don't know whether a data block on PDCH belongs to PDTCH or PACCH
without parsing it, because the latter one is being allocated on
demand. Let's use GSMTAP_CHANNEL_PDTCH by default, rather than
GSMTAP_CHANNEL_PACCH.
Change-Id: I7639215ef936a8ac05ca417a91f4e12755f318d4
First of all, we also need to apply the same filtering to Access
Bursts on PDCH as for the normal ones on RACH, i.e. filter them
by ToA (Timing of Arrival) and BER (Bit Error Rate).
Secondly, we shall not interpret Access Bursts on PDTCH/U as
handover related ones. Instead, let's print a warning and
ignore them since they are not (yet) supported by OsmoBTS.
Finally, in gsmtap_pdch() we need to set a proper channel type
for Access Bursts received on PDCH (PDTCH/U or PTCCH/U).
Change-Id: I461fde9f4543c45c42b591cd3fd0ff3d98673cec
RACH stands for Random Access CHannel, while in rach_pass_filter()
we're dealing with Access Bursts, that may be received on other
logical channels too (e.g. PTCCH, PDTCH or any other).
Change-Id: I1e5ca9930ab491a6916c972865154d54530cbf51
After getting rid of transceiver_available, this function is not used
anymore by any code, since its per-trx counterpart
l1if_provision_transceiver_trx() is the one used by other
code.
Change-Id: If5a988eb14658a78dd46234dccc052dc12fb872a
This variable meaning has been changing its exact meaning over time
until finally not being really clear which kind of state it holds.
Initially it seemed to be used to identfy whether CLOCK IND were being
received. However, over time both osmo-bts and osmo-trx have evolved and
were fixed so that clock indications are only sent by osmo-trx after
POWERON command is sent. As a result, this state can be checked simply by
looking at the "powered" phy_link variable, which is only set to true
once the TRX has confirmed the POWERON command, and hence it is sending
CLOCK IND.
On the other hand, at some point in time "available" started to be set to 1
in bts_model_phy_link_open(), which means available is nowadays almost
always 1 from startup until the end (only dropped during bts_shutdown(),
when we are already exiting the process anyway).
As a result, !available condition in scheduler_trx.c:trx_fn_timer_cb can
almost never happen, because available is set to true already. Only
possibility would be if an old process of osmo-trx (not set up by this
BTS process) is still sending CLOCK INDs, but in that case we for sure
don't want to configure the BTS based on that, but ignore them until
this BTS process has again configured the TRX. So that whole check can
be dropped. We are better checking for "powered" state, which is far
more accurate, and we better do that in trx_if.c before calling
trx_fn_timer_cb().
Other uses of "transceiver_available" being used can be changed to use
plink->state!= PHY_LINK_SHUTDOWN, since available was already being set
to 1 at the same time the plink->state was being set to
PHY_LINK_CONNECTING.
As a result of this state handling re-arrangement, OS#4215 is fixed
since trx_if_powered() is used instead of previous state condition to
check whether data frames should be sent.
Related: OS#4215
Change-Id: I35f4697bd33dbe8a4c76c9500b82c16589c701d4
It can be dropped since bts_shutdown() ends up calling immediatelly
bts_model_trx_close() which in turn calls bts_model_trx_close() which
sets enabled = false and calls l1if_provision_transceiver_trx() to
power off the TRX.
Related: OS#4215
Change-Id: If8b3d2379d7ae102e1c338f4558ac1352de761cc
Use of variables in each code is confusing and mixing configuration with
POWERON/POWEROFF state (which is at least per phy inst and not per TRX,
since those commands are only expected on the 1st phy inst).
* field "poweron" becomes "enabled", and is used as an indicator for
actions to take during TRX provisioning (hether to power it on and
configure it or to power it off).
* poweron/poweroff state becomes "powered", and it is shared by all trx
in same phy_link, and is updated only after confirmation by TRX.
* poweron_set becomes poweronoff_set (because it's used by both POWERON
and POWEROFF), and becomes shared by all trx in same phy_link, since
those CMDs are usually sent by first phy instance of the link (the first
trx).
Related: OS#4215
Change-Id: Icd0b482f1454236432e1952220bbec9d178b8607
check_transceiver_availability() is a loop over every trx, same to what
trx_set_bts() does, so let's call the per-trx version directly.
Change-Id: I8843c1438c6af700631aba7b7e72aae0bdb7ec3a
Currently there's bts-virtual specific fields in gsm_bts which is not used
by other models and are always allocated.
An alternative would be having a union with different structs inside,
one per model, but since we already have the bts_model abstraction, in this
case it makes more sense to use that abstraction instead of filling code
with preprocessor ifdefs to guard against non-defined types, etc.
Existing model specific data is moved there.
This new infra will be user further in forthcoming commits.
Related: OS#4215
Change-Id: Ib17a752cdbaa7d5eb8c5dfa0b197f80a4f38b38e
QTA is a Timing Advance value in units of 1/4 of a symbol. Let's
use ToA256 (1/256 of a symbol) field of L1SAP RACH.ind as a base
for QTA calculation in order to achieve better precision.
Change-Id: I6e6fa7985c430a9bdbd12af2a8b2a5a66f11a41c
If a logical channel, on which an Access Burst has been received,
is not either of RACH, PDTCH or PTCCH, then this is a handover
Access Burst, which is always encoded as 8-bit and shall contain
the generic training sequence (TS0).
Access Bursts on a PDCH time-slot are not related to handover.
Change-Id: If7d6135d6c4d7f9bd71d9fab6f8adc3f8cfd10ea
Vadim Yanitskiy
Pau Espin
Daniel Willmann
Alexander Couzens
Harald Welte
Philipp Maier
Oliver Smith
Martin Hauke