According to 3GPP TS 45.002, table 3, unlike the CCCH+SDCCH/4+CBCH
combination, which can only be allocated on C0/TS0, the SDCCH/8+CBCH
can be allocated on C0..n/TS0..3. In other words, having CBCH on
e.g. C1/TS2 is perfectly legal. This is why in gsm_bts_get_cbch()
we should check all transceivers, not just the C0.
Without this change osmo-bts does not send CBCH Load Indications
at all if the CBCH is allocated on C1..n.
Change-Id: Ib5976783b53521047fbdfc18e0e236e8bce8eaae
Related: osmo-bsc.git Ie79ccff4f8f0f1134757ec0c35e18b58081cc158
Related: SYS#5905
Both TRXC_RACH and TRXC_PTCCH are handled in the rx_rach_fn(),
so we can eliminate the need of having a 'switch' statement in
the general (perfrmance critical) code path.
Change-Id: I66d8785a63215af37a77e258039549e4e6292e49
Compared to TCH/F, TCH/H is a bit special in a way that:
* speech frames are interleaved over 4 consecutive bursts,
* while FACCH frames are interleaved over 6 consecutive bursts.
This is why in rx_tchh_fn() we allocate a buffer large enough to
store up to 6 bursts. Let's say we have that buffer filled up
completely with all 6 bursts (from 'a' to 'f'). Now attempting
to decode them may yield either a speech frame or a FACCH frame:
+---+---+---+---+---+---+
| a | b | c | d | e | f | Burst 'a' received first, 'f' last
+---+---+---+---+---+---+
^^^^^^^^^^^^^^^ Speech frame (bursts 'a' .. 'd')
^^^^^^^^^^^^^^^^^^^^^^^ FACCH frame (bursts 'a' .. 'f')
For FACCH we use measurement averaging mode SCHED_MEAS_AVG_M_S6N6,
so that 6 last samples are averaged - so far so good. For speech
we use SCHED_MEAS_AVG_M_S4N4, so that 4 last samples corresponding
to bursts 'c', 'd', 'e', 'f' are averaged - this is wrong.
We actually need to average the *first* 4 samples corresponding to
bursts 'a', 'b', 'c', 'd' in the case of speech. Let's add and use
a new averaging mode SCHED_MEAS_AVG_M_S6N4 for that.
Change-Id: Iea6f4e5471550f4c2b57aaebeac83c80e879489d
This should be better performance-wise and would also allow to avoid
having the same switch statement duplicated in functions added later.
Change-Id: If8124dcd38e7c8408a9f3b9a574d9e3181a2eb15
This is a purely cosmetic change. The new naming clearly indicates
how deep to go back in the measurement history (S) and how many
samples to average (N). For example:
* SCHED_MEAS_AVG_M_S4N4 - go S=4 steps back and average N=4 samples;
* SCHED_MEAS_AVG_M_S6N2 - go S=6 steps back and average N=2 samples.
Change-Id: I96a8dd08084c7c179f879fc00e75c5edcfb11caa
Set the FT (Frame Type) in the ToC (Type-of-Content) section as
defined in section 5.2 of RFC 5993. Before this change SID frames
had FT = 000 (Good Speech frame), because gsm0503_tch_hr_decode()
does not distinguish between speech and SID frames internally.
Change-Id: I09cec984bb60c754908126acf0300a2cc602485c
Related: SYS#5853
According to RFC5993, which is referenced by 3GPP TS 48.103, the
complete RTP HR payload consists of a Table-of-Contents (ToC) byte
followed by the 14 bytes of the HR codec frame. See section 5.2.
gsm0503_tch_hr_decode() outputs frames in the RTP format with
length of 15 bytes (120 bits): 1 (ToC) + 14 (HR frame):
+-------------+-------------------------
| ToC section | HR codec frame ...
+-------------+-------------------------
osmo_hr_check_sid() expects a HR codec frame of 14 bytes (112 bits)
as the input, so we should skip the ToC section when calling it.
Change-Id: Ie5fa776dcb2b2203a97aed56ecbf2450af7d87c1
Related: SYS#5853
According to 3GPP TS 48.058, section 4.1.4, BTS shall start transmission
on SACCH if both MS Power and *Timing Advance* IEs are present. There
can be no Access Delay IE in the RSL CHANnel ACTIVation message.
Change-Id: Icd8ccfd6e37ded8966125a473b5003845ba87fec
Fixes: I170b63c9856230d5f1a10654a9d950ada8e730d7
Related: SYS#5838
We already have BER10k calculated in the generic code path, so do
not calculate it once again in the FACCH specific branch.
Change-Id: I5d3955d09990e280d11d687385eeaf5edf437395
It makes no sense to perform the SID codeword lookup in signalling
frames (FACCH), because it can be present only in speech frames.
Change-Id: I2f8137993acfe8a8add3fc2af276e5eb4da1605e
Related: SYS#5853
Most of the BTS specific VTY commands restrict BTS number to '<0-0>',
while bts_c0_power_red_cmd has '<0-255>'. This confuses libosmovty:
OsmoBTS# bts ?
<0-0> BTS number
<0-255> BTS Number
OsmoBTS# bts 0 ?
% Ambiguous command.
OsmoBTS# bts 0 c0-power-red 0
% Ambiguous command.
Let's stick to '<0-0>', we don't support multiple BTS anyway.
Change-Id: I937ac421143678b97627c1bc4fe573831ce097f6
This new rate counter allows to monitor the efficiency of the
radio carrier cache used for routing Downlink bursts when
baseband frequency hopping is in use.
Change-Id: Ie6da829e47298476267c8df2dcedafad564cbbb4
Related: SYS#5855
Given how often we send and receive TRXD PDUs, I believe it maks
sense to use OSMO_UNLIKELY() in the error checking conditions.
Theoretically this should improve performance.
Change-Id: I9266aaf2bbc0acfe21e9bfb12c9f38621d120553
This avoid a NOTICE log line like the following when gsm_lchan_release()
is called.
"""
rsl.c:2484 (bts=0,trx=0,ts=2,ss=0) Sending RTP delete indication: cause = Normal event, unspecified
"""
Change-Id: I0ce78c52644983220f5810bc5c661b07afd9e543
If len is < 0, it means osmo_amr_rtp_dec() failed and some of the out
variables there are not set. We should check the return code before
continuing and using potentially uninitialized values.
Change-Id: I76020c6b5dc8d3e52e8c5be8cdecdf8a0bb52ed9
DSUM is somewhat similar to DMAIN, generic logging category used
in other Osmocom projects. This category is rarely used in a few
places, where the other categories could fit better. Remove it.
Change-Id: Ia9db783bc92b23ba87b4fdf1e4ed07d59ea6bbce
Remove the paragraph about writing to the Free Software Foundation's
mailing address. The FSF has changed addresses in the past, and may do
so again. In 2021 this is not useful, let's rather have a bit less
boilerplate at the start of source files.
Change-Id: I12b250e16426b125124def49e124e40ae93d0d58
An additional burst buffer is allocated in rx_data_fn() for Uplink
SACCH repetition, but unlike the main buffer it never gets free()d.
Change-Id: I93310e7aed91a49c0511e2ed30e000440617f95a
Fixes: I7e4cc33cc010866e41e3b594351a7f7bf93e08ac
Related: OS#4795, SYS#5114
Before a massive refactoring of the scheduler structures [1] it was
impossible to have a clean hierarchy, in which the burst buffers
get allocated as children of their parent timeslot structures.
This change makes it easier to read talloc reports and simplifies
memory management, offloading free()ing of the burst bufferes to
talloc.
Change-Id: Idb1ceaf83c433d2d0eb84d77c2187a00a657905c
Related: [1] I7c4379e43a25e9d858d582a99bf6c4b65c9af481
Add an osmo-bts meta-package that depends on the subpackages
osmo-bts-trx and osmo-bts-virtual. This is important, because the
downstream packaging of debian does not split osmo-bts in subpackages,
it has only one osmo-bts package. So without this, when installing
"osmo-bts" in debian while having the Osmocom binary package repository
installed and expecting to get the newer version, the user will actually
get the older version from debian.
Closes: OS#5319
Related: https://salsa.debian.org/debian-mobcom-team/osmo-bts/-/blob/master/debian/control
Change-Id: I1a6edf2eb146616ac51b7957368a8d057caa685f
Callers of osmo_wqueue_enqueue must always check the return value
and free the message themselves in the error case.
Change-Id: Ic67fbef23e419c0c8a7bcfb16d134e1bf649de72
Related: OS#5329
If a new default message is installed via RSL, and the old default
message is currently being transmitted, we must set cur_msg to NULL.
The old default message must be talloc_free()d unconditionally whenever
a new default message is being set.
We can do that by using the TALLOC_FREE macro.
Change-Id: Id32c2074b61cd1f09957b9d1558ffb3a7691a8e0
Related: OS#5325
If the currently transmitted message is the default message,
bts_ss->cur_msg == bts_ss->derfault_msg. In this case we cannot
simply talloc_free() both of them, as it would result in a boudle-free.
Change-Id: I2d3645e34d31507b012a53ffe12d14223682f808
Closes: OS#5325
Fixes: Ib01d38c59ba9fa083fcc0682009c13d2db3664fe
The order of interference level boundaries is not clearly defined by
3GPP, so we should support both ascending and descending variants.
Change-Id: I88d841d8d835bde8392c7b606b28c9070b7adc6e
Related: SYS#5313
It may happen after the A-bis connection recovery that the RF RESource
INDication message gets sent too early, while some timeslots are not
yet configured. This confuses the BSC and provokes error messages.
Change-Id: I00bc6fe67ea1bbedcd5d8640e73bd8b16b9e667f
Related: SYS#5313, SYS#4971
Let's make sure all ts->pchan* related data is reset when we release the
TS. This is important for pchan_is, since in bts-trx upon shutdown
finish the PDCH lchan of a osmo dyn TS is set to
lchan->state=LCHAN_S_NONE, and as a result when the PCU tries to release
it by means of PCUIF act_req later, it may be ignored since the lchan is
already in erased state.
Related: SYS#4971
Change-Id: Ic7c34c0de23101ce094ffd03e00b4d2f6a551152
As a side effect, we have to sacrifice a unit test (TC_inval_dummy)
because it becomes impossible to pass a dummy or invalid SACCH block
to lchan_bs_pwr_ctrl().
Change-Id: I937117cf26fb718d57920382f6972390ad498c51
Related: SYS#4918
The current Timing Advance value can be obtained either from the
L1 SACCH header (if received) or from lchan->ta_ctrl.current.
Change-Id: I2b3693a0e49f03f2b4496c9dbd30cf47e9bc86b5
Currently an Uplink SACCH block is being passed to LAPDm first, and
then gets forwareded to the BSC in handle_ms_meas_report(), together
with the Uplink measurements collected so far.
This approach has a serious flaw: handle_ms_meas_report() won't be
called if an Uplink block contains SAPI=3 data (SMS) or was not
decoded at all (len=0) fow whatever reason. Therefore, no RSL
MEASurement RESult message will be sent to the BSC.
Rename handle_ms_meas_report() to lchan_meas_handle_sacch(), and call
it from l1sap_ph_data_ind(). This way perioduc RSL MEASurement RESult
messages will be sent regardless of what happens on Uplink SACCH.
Change-Id: Ifed91f87fd653debc87a09da3fd31ad64a13f330
Fixes: TC_meas_res_speech_{tchf,tchh}_sapi3
Related: SYS#5319
This way we keep all BTS connected to the same BSC if there was a
spurious network problem.
Related: SYS#4971
Change-Id: I16b75da5987584d099edc3a640f3a5cd61f3ad69
Pau Espin
Vadim Yanitskiy
Oliver Smith
Harald Welte
Neels Hofmeyr