We have licensed the code under GNU Afffero Public License,
and state that in the first paragraph as well as in the link
to the license. However, a paragraph in the middle stated
"see the GNU General Public License", which is somewhat misleading.
Let's fix that.
Change-Id: I37e503b195fe43e1da42c080900504ca8e682e76
If there's nothing to transmit over a CSD NT channel, both ends generate
NULL frames. Let's add an option to suppress GSMTAP output for those,
creating pcap files with less noise.
Change-Id: I85a2159cfaa01bfb4205c1462e3a9dbda68e4bad
Depends: libosmocore.git I2d9bd8eb4f0cd0f72c436996767b199429596917
In CSD (Circuit Switched Data) NT (Non-Transparent) mode, there
are RLP (Radio Link Protocol) frames inside the modified V.110.
wireshark alrady has a dissector for this, and we've introduced
a GSMTAP type for RLP some time ago. So with this patch, we now
generate such GSMTAP RLP frames.
Change-Id: I6a258458822bcb3fe7290a9b9b3d104beecda219
The current implementation does substitute all missing meas samples
with dummy -SUB measurements and then complain about exceeding
amount of -SUB samples.
Change-Id: Iab84f4b64b645486e2f115b0f82ee2f27eb992bc
Related: OS#6168
3GPP TS 45.008, section 8.3 defines TDMA Fn subsets, which shall
always be transmitted when DTX is employed, only for:
* TCH/F in signalling mode (but not for TCH/H),
* TCH/H and TCH/F in data mode (CSD) [*],
* TCH/FS, TCH/EFS, and TCH/HS.
For channel modes employing AMR codec, in particular:
* TCH/AFS, TCH/WFS, O-TCH/WFS,
* TCH/AHS, O-TCH/AHS, O-TCH/WHS,
there exist no fixed TDMA Fn subsets, but DTX is still permitted.
For those we expect at least one SACCH frame, plus a variable
number of speech frames (0 or more).
[*] Handling of data modes is fixed in a follow-up patch.
Change-Id: Ied477528d77871dd7e3b5b7b433a4e33bca40011
Related: OS#6168
The RSL link is configured/set up by the BBTRANSC NM object, hence move
it to the appropiate substruct.
Related: OS#5253
Change-Id: I62937cbd81c27274b9f5f70d454d5319a6898c7b
The E1/E2/E3 bits are set based on out-of-band knowledge of the
current user data rate. The actual bit values are defined in
3GPP TS 44.021, Figure 4 "Coding of data rates".
TODO: this is only valid for transparent services,
for non-transparent services see 3GPP TS 48.020.
TODO: lchan->csd_mode is never set to the actual CSD mode...
Change-Id: I1a14597dff746cf975140b294400a2cc05badccd
Related: OS#1572
Since 95407f3f osmo-bts-trx supports scheduling all CSD specific
channel rates, however the rate adaptation was missing.
On the radio interface we deal with CSD-modified V.110 frames, which
need to be converted to normal 80-bit V.110 frames (RA1'/RA1), which
in turn need to be batched and sent in RFC4040 "clearmode" 160 octet
RTP payloads (RA1/RA2 as per I.460).
Note that this patch comments out TCH/F14.4 in bts_supports_cm_data(),
so that all channel allocations for this mode would be NACKed. The
reason for this is that the rate adaptation functions for TCH/F14.4
are different than the RA1'/RA1 and the RA1/RA2.
For more information, see:
* 3GPP TS 44.021, section 8 (functions RA1'/RA1)
* ITU-T I.460, section 1.1 "Rate adaption of 8, 16 and 32 kbit/s streams"
Change-Id: I5e3701ad52d5d428fd02caff037881045f2d0a02
Related: OS#1572
The abstract representation of the rest octets are moved to the header
file, so that the test case can include it. append_p*_rest_octets()
function become externally available for test.
Change-Id: Ifa5be8998b671160e38af1be707e040b00d407b8
Related: OS#5781
The location of the NCH is defined by the rest octet of System
Information 1. If NCH is defined, the given CCCH blocks are used for NCH
instead of AGCH/PCH.
The current list of VGCS/VBS call notifications is transmitted on the
NCH. If there is no notification, an empty notification is transmitted
on the NCH.
The Notification List Number (NLN) is used to indicated new
notificaitons. Only the last notification (or empty notification)
indicates NLN. This way the MS can determine after two equal NLN that
the complete list has been recevied.
Change-Id: I82fdaba3faaced76267a99ae14a5458a1b41fdaa
Related: OS#5781
When BCCH INFO is received via RSL message, the rest octet of the System
Information 1 message is parsed to get the position of the NCH. The
position is stored in the gsm_bts structure. If the position is not
present int the rest octet, the stored value is set to negative.
Change-Id: I799a27179d478d4ff577d8bc47ae524834851e85
Related: OS#5781
Title refers to the maximum length of the osmo_wqueue used for
the PCU socket connection.
Related: OS#5774
Change-Id: Id6ba6e4eadce9ce82ef2407f4e28346e7fe4abfa
Current osmo-bts-trx includes a provision for invoking ECUs from
libosmocodec in the UL path from the channel decoder to the RTP
output. This pre-existing implementation is counter to the spirit
of 3GPP specs (a BTS should merely mark BFI conditions in its UL
output, as opposed to actively modifying the frame stream with an ECU),
inconsistent between different osmo-bts models (only in -trx and no
others), and inconsistent even within osmo-bts-trx itself, where
the link quality check in l1sap will sometimes suppress the output
of the ECU - a quirk which the designers of the current mechanism
most certainly did not intend.
The solution decided upon in OsmoDevCall on 2023-06-21 is to make
this ECU optional per vty config, and move it from the trx model
to the common layer to resolve the inconsistencies. Implement the
first part: make the ECU application optional per vty config.
For backward compatibility with existing deployments, the new
"rtp internal-uplink-ecu" setting is enabled by default on osmo-bts-trx
but not on any other models.
Related: OS#6040
Change-Id: I0acca9c6d7da966a623287563e0789db9e0fae8e
The new vty option "rtp hr-format (rfc5993|ts101318)" selects the
RTP output format to be used for HR1 codec, consistently across
all models. The default is set to match legacy behavior: ts101318
on osmo-bts-{lc15,oc2g,sysmo} and rfc5993 on osmo-bts-trx.
On models where no legacy behavior is applicable, the default is
set to rfc5993 as a forward-looking measure - see OS#6036.
Closes: OS#5688
Change-Id: I168191874a062429a57904511a1e89e3f588732e
This way the data model in TS 12.21 (Figure 1) is followed, where
there's a BTS Site Manager containing one or more BTS. In our case we
only support 1 BTS (cell) so far.
Change-Id: Ideb0d458ec631008223f861cf8b46d09524a1a21
Related: OS#5994
The param is usually called obj_class, but here it is called kind.
In any case, change the param to pass the related struct gsm_abis_mo
(which still contains mo->obj_class), similar to what's done in other
bts_model functions such as bts_model_opstart().
Change-Id: Ife2e98a791455d5f7e7052356d559af2f1d4d185
This way we simplify the common lower level interface. It can be added
in the future again if it is really required at any point to pass/use
specific TLV values in the device-specific code.
Change-Id: I64c6c6834e277b1d75a97d6f408e7e1b7ca85832
Simply return error codes from lower layer implementations, and do
the OML handling in the common NM TS 12.21 FSMs.
As a result, we simplify the logic in the lower layers.
Change-Id: I281c07bb5ad88ee03542f092141cebe036d10aee
Our linter would complain about this these days:
__func__ should be used instead of gcc specific __FUNCTION__
Change-Id: I80bf6d0a89ce6454ae063759d6088a28b04670c0
In some environments it is highly desirable for the RTP stream
coming from each GSM call UL on a BTS to be fully continuous,
without any gaps, with _some_ RTP packet emitted every 20 ms,
even if there is no speech or SID frame to be sent in that frame
time window. The present change adds an rtp continuous-streaming
vty option which, when enabled, causes the BTS to emit RTP packets
with a zero-length payload, instead of producing gaps in the RTP
stream, when it has nothing else to send.
Related: OS#5975
Change-Id: Ic0e2edf2ed90ba0ac6bee5e7d9629bf0255e256d
This option should be used for any executables which are used only
for testing, or for generating other files and are consequently never
installed. By specifying this option, we are telling Libtool that
the executable it links will only ever be executed from where it is
built in the build tree. Libtool is usually able to considerably
speed up the link process for such executables.
Change-Id: I06d3d5ab1dd21400a72f76eecc508886617ef4c6
The scheduler is now using the lookup tables instead of these
functions. The only part using them is the AMR unit test.
Change-Id: I1a9c80dd12252e7befe9c9bc8e8f7ee8648b5465
This library will be used soon when adding Osmux support to osmo-bts.
Furthermore, it nice to have it available to make use of other general
interfaces to create connections, primitives, RTP and AMR related
functionalities, etc.
Related: SYS#5987
Change-Id: I49db4de715065c083e1249cbeae6298d6868e229
Make them more easy to read and edit by splitting to one element per
line when several elements are present.
Change-Id: I24ecfa1167b806dcb3a5a0c00343299df842a78b
3GPP TS 45.008, section 8.3 defines active TDMA frame subsets for
TCH channels, which shall always be transmitted even during the
silence periods in DTX mode of operation. Each frame number
listed in this section corresponds to a single burst.
The Uplink measurements always contain TDMA FN of the *first* burst
of a block, so it does not make sense to match the given FN against
all FNs in the respective subset. Instead, we should match only
specific FNs in accordance with the block mapping rules defined in
3GPP TS 45.002, section 7, table 1.
In the active subset for TCH/F there is only one *complete* block
starting at FN=52. Incomplete blocks {52, 53, 54, 55} and {56, 57,
58, 59} contain only 50% of the useful bits (partial SID) and thus
~50% BER, so we don't treat them as SUB.
In the active subsets for TCH/H there are two *complete* blocks
for each sub-slot. Their respective first FNs can be efficiently
defined in a lookup table (see ts45008_dtx_tchh_fn_map[]). Note
that we can use a single lookup table for both sub-slots of TCH/H
because their TDMA FNs do not overlap.
This patch fixes unexpected SUB-RxQual values > 0 on TCH channels
with DTXu enabled and other than AMR (HR, FR, EFR) codec in use.
Change-Id: I8cc3a755a8ad4dc564439aab2298c1e97ac0592d
Related: SYS#5853
SACCH detection can be simplified by checking the RSL Link ID in
process_l1sap_meas_data(). This eliminates the need to lookup
the multiframe position by calling trx_sched_is_sacch_fn(), which
definitely takes more CPU time than just L1SAP_IS_LINK_SACCH().
Calling trx_sched_is_sacch_fn() is still required for BTS models
reporting the measurements via PRIM_MPH_INFO (legacy way),
separately from the related Uplink blocks.
This patch can be summarized as follows:
* detect SACCH and set .is_sub=1 in process_l1sap_meas_data();
** for PRIM_MPH_INFO use trx_sched_is_sacch_fn();
** for PRIM_PH_DATA use L1SAP_IS_LINK_SACCH();
* do not call trx_sched_is_sacch_fn() from ts45008_83_is_sub();
* modify the unit test - test_ts45008_83_is_sub_single();
** remove test_ts45008_83_is_sub_is_sacch().
Change-Id: I507e96ee34ac0f8b7a2a6f16a8c7f92bc467df60
Related: SYS#5853
* Print unexpected TDMA FNs, each on a separate new line.
* Do not abort() on mismatch, keep running.
Change-Id: I32c104b139f32a39c8347de19de6ad7caec811de
Related: SYS#5853
Looks like this structure was copied from openbsc/osmo-bsc as-is.
The ms_mode[] makes no sense in the context of BTS, so remove it
and rename bts_mode[] to mode[] for the sake of brevity.
Change-Id: I7442360ed857554440a0b9854f2d2bbab9dc5a71
Related: SYS#5917, OS#4984
When using 'check_PROGRAMS', autoconf/automake generates smarter
Makefiles, so that the test programs are not being compiled during
the normal 'make all', but only during 'make check'.
Change-Id: I18ebb7395024a490da743c0bcb20959e6e9c7017
This unit test demonstrates a problem in amr_parse_mr_conf(): the
threshold and hysteresis values are parsed incorrectly. They are
expected to match what we have in amr_fr_bts_mode_def[]:
Mode[0] = 0/13/4
Mode[1] = 2/25/4
Mode[2] = 5/37/4
This will be fixed in a follow-up patch.
Change-Id: Iab7e8878e62f598959e80fcb7e729b7f496962a2
Related: SYS#5917, OS#4984
Both misc_test_{SOURCES,LDADD} were simply ignored because
binary 'misc_test' is not listed in noinst_PROGRAMS...
Change-Id: Ia1739bab76261ff6d50824462b8ed2e0b34fb464
Related: SYS#5917, OS#4984
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
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
This test showcases the current issue where the loop keeps bouncing
between 2 good MS Power Level values due to the loop "accepting" and
"reporting back" the previously considered good MS Power Level
announced/used by the MS. Hence, upon report back from the network, the
MS will switch to this new MS Power Level, and same thing will ocurr
over and over.
Related: SYS#4917
Change-Id: I16ed7fe8a123b99008e0c041d2f3e4232057d55c
Similar to what is already provided for power control loops. However,
there's no existing way to communicate TA control parameters from the
BSC to the BTS, so implement them locally in BTS vty.
Related: SYS#5371
Change-Id: I9fa71f836bb9a79b0ef2567bfcfdf38ff217840b
TS 45.008 section 4.7.1:
"""
Upon receipt of a command from an SACCH to change its power level on the corresponding uplink channel, the MS
shall change to the new level at a rate of one nominal 2 dB power control step every 60 ms (13 TDMA frames), i.e. a
range change of 15 steps should take about 900 ms. The change shall commence at the first TDMA frame belonging to
the next reporting period (as specified in subclause 8.4). The MS shall change the power one nominal 2 dB step at a
time, at a rate of one step every 60 ms following the initial change, irrespective of whether actual transmission takes
place or not.
"""
Since the reported MS_PWR in L1 SACCH Header is, according to specs, the
one used for the last block of the previous SACCH period, it becomes
clear the first SACCH block after a requested MS Power Level change by
the network may contain mismatches between the announced MS_PWR by the
MS and the measured Rxlev/RxQual. Hence, let's better use a
P_CON_INTERVAL of 1 which retriggers the MS Power Control Loop every second
SACCH block.
Change-Id: If6cb8945645a2031f2b2ee65d9b9f51e75cd9af1
Related: SYS#5371
Harald Welte
Vadim Yanitskiy
Pau Espin
Andreas Eversberg