* Don't copy features for osmo-bts and nanobts initially, wait until
BTS reported its features
* Checks for BTS features in VTY cmds: pass if features are not known
(not yet reported by the BTS), fail if the feature is missing
* Once BTS reports its features, check relevant VTY config parts again
Related: SYS#5922, OS#5538
Change-Id: I7fca42a39a4bc98a6ea8b9cfab28c4bad3a6a0aa
Its name is totally misleading, since they seem to be related to
GetAttributes messages rather than SetAttributes.
Change-Id: I306cb407dbd9b98e301b5d93046bdadcb466b82b
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: I030c88545cdc71b3ad9e83f9c2ba7b27177c2ac8
When bad RxQual causes handover to a cell with weaker RxLev, then
handover oscillation *will* happen, as shown in test_rxqual.ho_vty.
Introduce a penalty timer for a cell where we had bad RxQual.
This delays handover back to the cell with stronger RxLev by the penalty
timeout; hopefully the interference is gone after the timeout.
Usually, we set new configuration elements so that osmo-bsc behaves the
same as before the config item was added. In this instance, this makes
no sense, because no-one ever wants handover oscillation from bad
RxQual, which is guaranteed to happen without the new penalty timer. Set
it to 60 seconds by default, same as other penalty timers.
Related: SYS#5911
Change-Id: I057b156604a104a26a7ce45d1c7adadbf452c932
I find it weird that we store the A5 algorithm ID in a format that
is used on the wire: N + 1 (valid for both A-bis and A interfaces).
What confused me even more is that in some functions we print it
as if it was in a normal, human-readable format. And this is
also why one can see weird constructions like:
if (lchan->encr.alg_id > ALG_A5_NR_TO_RSL(0)) { ... }
Let's ensure that our internal structures use the A5/N format:
alg_id=0: A5/0 (0x01 on the A-bis/A interface)
alg_id=1: A5/1 (0x02 on the A-bis/A interface)
alg_id=2: A5/2 (0x03 on the A-bis/A interface)
...
alg_id=7: A5/7 (0x08 on the A-bis/A interface)
so that we can print and compare the value of alg_id without using
additional arithmetics. Let's also rename 'alg_id' to 'alg_a5_n'
as it most clearly indicates which representation it is storing.
This is how the above code snippet would look like:
if (lchan->encr.alg_a5_n > 0) { ... }
Change-Id: Ieb50c9a352cfa5481aebac2379e0a461663543ec
Teach osmo-bsc to handle empty N-Connect. So far we were always
expecting user data in an SCCP N-Connect from an MSC. However, it is
perfectly valid for an initial BSSMAP request to follow later.
This is relevant for:
- Handover Request (incoming inter-BSC handover)
- Perform Location Request (query physical location of the MS)
Add state WAIT_INITIAL_USER_DATA with new timeout net X25. Always enter
this state so that we don't have two separate code paths for handling
initial user data.
Related: SYS#5864
Change-Id: I535c791fa01e99a2226392eb05f676ba6c3cc16e
According to 3GPP TS 44.018, section 10.5.2.1b.2, only ARFCN values
in range 1..124 can be encoded using the 'bit map 0' format. Before
this patch, ARFCN values belonging to E-GSM band (0, 975..1023) were
ignored in bitvec2freq_list(), and thus not present in the resulting
Cell Channel Description IE.
Change-Id: I17739e6845cd84e2a81bc406dd532541f7c52cb6
Related: SYS#5854
This commit demonstrates what happens when a cell has channels in
both P-GSM and E-GSM bands (case 'c'). As can be seen from:
Case a) only the BCCH carrier: 10
Case b) more carriers from P-GSM band: 1 3 10 64 99 124
Case c) more carriers from E-GSM band: 1 3 10 64 99 124
in both cases 'b' and 'c' we have the same set of ARFCNs. Carriers
from the E-GSM band are not present at all. This is wrong and will
be fixed in the follow up change(s).
Change-Id: Ied0519c70501f105673a9b36657101063d275058
Related: SYS#5854
As the comment above the fix suggest, the encoding is in 10ms units.
osmo-bts is also doing the proper:
"""
uint8_t t3105 = *TLVP_VAL(&tp, NM_ATT_BTS_AIR_TIMER);
bts->t3105_ms = t3105 * 10;
"""
Related: SYS#5838
Change-Id: Ie190514ee35d1ca81b70e9180bf7393b973d3504
The timer (T4) that controls the re-sending of the BSSMAP RESET can not
be changed via the VTY, althrough it is defined via a tdef struct. Lets
add a description along with default values to make it configurable via
the VTY.
Change-Id: I1fb5699220ab8a643a168567a89c6f381fe433a7
Related: SYS#5796
Properly implement the separate conn release stages in separate FSM
states:
x) sent Clear Request, wait for a Clear Command from the MSC.
Timeout after a configurable 60s.
y) after a Clear Command and sending a Clear Complete, wait for the SCCP
RLSD. Timeout after a configurable 60s.
z) terminate after the RLSD is received / after timeout.
handover_test.c needs a little tweak to make the MGCP release work with
its fake MGCP client, because cleanup now ensures to invoke
gscon_forget_mgw_endpoint() in all cases.
Related: I680ec4ed866aa5f0b1ff29e7e98322615cfb288d (osmo-ttcn3-hacks)
Related: OS#5337
Change-Id: Ie975117d37f38ba853589dc7f8d3e94f8f9586b2
osmo-trx-uhd with a B200 has proven to provide bad (lower than usually
considered good) C/I values due to high noise (even with band filters in
place). Hence, default thresholds (gathered from literature on the topic)
are too high and end up in bad algorithm output decisions.
Furthermore, most users of Osmocom don't use it in densely populated
areas, hence RXLEV based algorithm used when C/I based one is disabled
is good enough.
Let's disable C/I based one by default, and let advanced users which
specific needs to enable and confiure thresholds specifically for their
needs (hardware, cell surrounding conditions, etc.).
Related: SYS#4917
Change-Id: If1a73c60695379bcfcd0f44c6ec6dd659563e279
This is a candidate for adding to libosmocore (as osmo_time_cc), but
let's first use this in osmo-bsc to make sure that it works as intended.
I started out expecting to be done with this in half an hour, but I
found out that accumulating elapsed time to an integer counter has a
staggering amount of complexity to it, and a million pitfalls.
The intended use is to report allAvailableSDCCHAllocated and
allAvailableTCHAllocated performance indicators in OsmoBSC. Hopefully
this will also be generally useful elsewhere, to be worth the effort.
Related: SYS#4878
Change-Id: Icdd36f27cb54b2e1b940c9e6404ba9dd3692a310
It's more logical to have the boundaries sorted in ascending order:
* band 1 represents lowest interference levels,
* band 5 represents highest interference levels.
Change-Id: Ie9bf4bf0c89418685b8ea5096332d22cfba7c521
Related: SYS#5313
It is possible to change the neighbor-list mode via the VTY from
automatic mode to manual neighbor-list configuration. In the manual
mode, the user can add ARFCN values manually. This command can be found
under the bts node. Lets add pendant of this command on the control
interface as well.
Change-Id: Id97bc0d31a358db6221c385761773fb48670c921
Related: SYS#5641
The VTY allows flexible control over the neighbor cell information via
the neighbor command, which can be found in the configure terminal under
the bts node. Lets add pendant of this command on the control interface
as well.
Change-Id: I343a40e18fa9b91e6c381912c0426a002841e079
Related: SYS#5641
The value ncc_permitted is preset in osmo_bsc_main.c from
bootstrap_bts(). It is a constant value that also cannot be changed via
the VTY. Therefore it should be set from bts_alloc(). This also fixes
the problem that when the BTS is added at runtime from the VTY. BTSs
added at runtime would have an all zero ncc_permitted until the next
restart of osmo_bsc.
Change-Id: I9f02277d7b4b4bcb383e749435416a0b22efd5e8
Related: SYS#5369
These are not needed anymore since we re-introduced libbsc, specially to
avoid all this churn.
Some specific methods are explicitly required to be overwritten by
tests, so we specificially mark those with __attribute__((weak)) in
order to be able to overwrite them.
This is the last step towards fixing interdependency mess of symbols and
stubs, and requires previous patches in order to have tests apssing
fine.
Change-Id: Ic7401b8a6eb903882e30fda1cf091ac99a254ef0
This allows having it initialized automatically, as we usually do with
this type of code. As a result, tests or other apps importing libbsc
don't need to take care of calling it.
NOTE: This fix is required by follow-up patches where some stubs are removed
and hence some tests start using FSMs internally. Since tests were not
using those FSMs before, there was no need to call ts_fsm_init().
This is one further step towards fixing interdependency mess of symbols
and stubs.
Change-Id: I0e4b95b5e73fbb3844d83ba33e66786831088e1f
This is used inside group of files forming libbsc (shared files used by
several apps). Let's instantie only once inside a file from libbsc
instead of doing so on each binary.
This is one further step towards fixing interdependency mess of symbols
and stubs.
Change-Id: I9b287aa492ca6aae5fc56133e1510aff3146fe25
Increase the reaction time at the expense of more stable loop with less
temporary oscillations.
See updated user manual documentation in this commit for a larger
description.
Related: SYS#5371
Change-Id: I46be244a5e01a74086e3a977ec3ea139742a0074
* Adds vty option dyn-bsc for ms-power-control -> mode
* Imports power_control.c from osmo-bts project
[at commit 2f3cd4b697972d8484f9a9d3b7ef634086f65fa5]
* Removes unused C/I code from osmo-bts's power_control.c
This patch then calls the power loop on receipt of measurement
reports and updates the MS Power Level accordingly.
Change-Id: Ibc307e758697eb5ca3fb86622f35709d6077db9e
Improve the current VTY support to allow enabling/disabling C/I logic
independent from value setting. This way C/I support can be quickly
disabled & enabled.
Reminder: changing power parameters still require VTY Command "bts NR
resend-power-control-defaults" to be excuted prior to new parameters
being applied on the BTS.
Related: SYS#4917
Change-Id: Id1224c2d9a52db2ed805c49e048d3086ed0167f5
Setting LOWER_CMP_N and UPPER_CMP_N for all channel types can be quite
cumbersome and end up in lengthy config files. Let's instead add a
placeholder command to apply it to all channel types of a BTS at once.
This is useful specially since a user disabling C/I capabilities
probably does so because it may require a fair amount of fine-tuning
parameters to have it working perfectly. Hence, a user not willing to
spend time configuring those parameters correctly (and for which default
ones doesn't work properly) will require quick way to get rid of C/I
based MS Power Control Loop. By disabling C/I comparison, osmo-bts will
rely on RxLev only when applying the MS Power Control Loop, which is
fine for non noisy environments.
Related: SYS#4917
Change-Id: I0e1a1a9228a15e9ec9c41b7952b03e1d25309706
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.
Related: SYS#5371
Change-Id: Iade5b597e0e56b07c6d78995fcec7c641e4e643f
This commit extends existing VTY and RSL infrastructure to configure and
manage MS Power Parameters used in MS Power Control loop, by adding
support to set up Carrier-to-Interference (CI) parameters.
Using C/I instead of existing RxQual is preferred due to extended
granularity of C/I (bigger range than RxQual's 0-7).
Furthermore, existing literature (such as "GSM/EDGE: Evolution and Performance"
Table 10.3) provides detailed information about expected target values,
even different values for different channel types. Hence, it was decided
to support setting different MS Power Parameters for different channel
types.
These MS Power Parameters are Osmocom specific, ie. supported only by
newish versions of osmo-bts. Older versions of osmo-bts should ignore
the new IEs added just fine. The new IEs containing the MS POwer
Parameters are not send for non osmo-bts BTSs, hence this commit is
secure with regards to running osmo-bsc against an ip.access BTS such
as nanoBTS.
Related: SYS#4917
Depends: libosmocore.git Change-Id Iffef0611430ad6c90606149c398d80158633bbca
Change-Id: I7e76ec47b323d469f777624b74b08752d1f5584f
Since the libosmo-mgcp-client now supports MGW pooling, lets use this
feature in osmo-bsc. Large RAN installations may benefit from
distributing the RTP voice stream load on multiple media gateways.
Depends: osmo-mgw Icaaba0e470e916eefddfee750b83f5f65291a6b0
Change-Id: I8f33ab2cea04b545c403a6fe479aa963a0fc0d0d
Related: SYS#5091
Allow resetting the BSSMAP link from VTY, for BSC_Tests.ttcn.
In the field, detecting that an MSC is lost is done by getting three
connection failures in a row. For the BSC_Tests, it is easier to just
provide a VTY command to reset an MSC's link status.
I want to add tests that verify the stat items reflecting the MSC
connection status. To be able to run a test expecting fewer connected
MSC after a test that launched more MSCs requires the links to be reset.
Related: SYS#5542
Related: Ice3056dc46c94f9399f8379db7aeb7193782f2f2 (osmo-ttcn3-hacks)
Change-Id: I1975941b790d2b30d0904d41e456220cba26ecff
Add experimental 'pre-ts-ack' to the 'immediate-assignment' options:
send the IMM ASS even before a dynamic timeslot is switched. This
possibly saves an Abis roundtrip, but may be racy.
When pre-ts-ack is chosen, already do the IMM ASS before the dyn TS
pchan switch is ACKed.
In Immediate Assignment, in case the dyn TS is not ready yet, get the
pchan kind from lchan->type, which already reflects the target type, and
not from ts->pchan_is, which still reflects the previous pchan type.
Related test is in I2ae28cd92910d4bc341a88571599347a64a18fe5
Related: SYS#5559
Change-Id: I19e6a3d614aa5ae24d64eed96caf53e6f0e8bb74
This patch adds only the VTY config option without any effect, to ease
patch review.
The implementation follows in I56c25cde152040fb66bdba44399bd37671ae3df2
The new config option is written so that further variants of Immediate
Assignment sequencing may be added easily.
See also I19e6a3d614aa5ae24d64eed96caf53e6f0e8bb74.
Related: SYS#5559
Change-Id: I710343d1728153faf3db9758ff5a1ef26bb8d3d4
In the command
bts <0-255> trx <0-255> timeslot <0-7> sub-slot <0-7> deactivate fr
the final argument indicating the channel type does not make sense and
is not actually used. Define a separate vty command for 'deactivate', so
that it doesn't require arguments only used for 'activate'.
Change-Id: Ibdeca3b1d75b9f6092f566544e9d5f4da67fffce
Usual allocation mechansim, when some signalling channel is needed,
first tries to reserve an SDCCH, and if all of them are exhausted, then
attempts to reserve a TCH as a last resort.
This, however, may cause TCH starvation under certain situations, for
instance if there high load on other services (LU, SMS, etc.).
Hence, it may be desirable for the operator to forbid reservation
of TCH slots once SDCCH become exhausted. This commit is thus adding a
VTY command which allows forbidding it. The default behavior (allow using
TCH timeslots when SDCCHs are exhausted) is kept as before.
The above mentioned prohibition is applied only to non-voicecall related
signalling services. That's because voicecall services will end up
requiring a TCH anyway, and forbidding reservation of TCH straighaway
when SDCCHs are exhausted would mean no voice calls could be initiated
while still TCHs would be available.
Related: SYS#5548
Change-Id: Ib08027125145df26602069bfb51847063b0ccc0c
Every time a new file is added in osmo-bsc, it ends up being a pain
because its .o file has to be included to other tests/util binaries, or
stubs need to be added.
Let's instead bundle all .o files together in an .la file and pass that
around.
Change-Id: If91dc589ea1e476da105b58846d1c3e720a439e1
The VTY handover_vtc.c offers a large number of handover specific
settings. Those settings are (with one exception) auto generated using
macros. Lets add an equivalent for the control interface that uses the
same auto generation mechanisms.
Change-Id: I12f143906818fd6b16e8783157cbb1eb51e49ffc
Depends: libosmocore I53fc207677f52b1dc748b01d58424839cdba807c
Related: SYS#5369
Clarify that filling half-used TCH/H first only happens on dynamic
timeslots, not static ones.
Related: SYS#5313
Change-Id: I5213459fb7fb201361ce0d6198fc0c2c745deee1
In a discussion about the effect of interference levels, I noticed that
there is not sufficient clarity about how strongly the preference of
static timeslots is ranked. This test helps to show what we have.
Related: SYS#5313
Change-Id: I0911cd74613045d9fbe29d04eaef036d32049b92
The VTY defun already indicates BSC_VTY_ATTR_RESTART_ABIS_OML_LINK
correctly, but so far we would immediately start using the new values
internally, and wrongly interpret interference levels. Fix that.
Have bts->interf_meas_params twice: interf_meas_params_cfg for the VTY
configured values, and interf_meas_params_used for the values that the
BTS actually knows about, after they were sent via OML.
In a running BSC, when changing the interference level boundaries on the
telnet VTY, the BTS is not immediately told about the change. That would
require a BTS restart. Hence store the cfg values separately in
interf_meas_params_cfg. For comparing/printing interference levels in a
running BTS, only employ the values that were actually sent via OML and
placed in interf_meas_params_used.
Related: SYS#5313
Change-Id: Iad8cf4151ff7f86dc0549158ed5d91d788d40b1f
Hold off re-assignment after an intra-cell re-assignment due to low
rxqual.
Adjust test_amr_tch_h_to_f_rxqual.ho_vty to show the changed behaviour.
Related: SYS#5198
Change-Id: Id00a07313fe04eec509b336c0637b59c707760e0
First add a handover test script that shows the behavior without the
low-rxqual-assignment penalty timer implemented. When implemented, the
changes to this test script will show the change in behavior.
Related: SYS#5198
Change-Id: I799fce709c86401546ccfe41b9f57fd579bcd987
With recent addition of fake time in handover_test ('wait cmd'), show
how a penalty timeout in handover decision 2 passes and allows a
handover again after due time.
Related: SYS#5198
Change-Id: I65e59cc7309778cf9d71612669ce84d101c8135e
Use recently added fake-time 'wait' command to show how the lchan in
LCHAN_ST_WAIT_AFTER_ERROR recovers as soon as timer X3111 has passed.
This prepares for also waiting for the penalty timeout to pass.
Related: SYS#5198
Change-Id: I8f7668b6d08a0dac9e90d2358955f9d5099d39fa
Add a 'wait' cmd that lets (fake) time pass.
An ucoming patch will show the
first use of this: "test_penalty_timer.ho_vty: show lchan recovery"
I8f7668b6d08a0dac9e90d2358955f9d5099d39fa
My actual original reason to add this follows in patches
- "handover tests: test passing of penalty timeout"
I65e59cc7309778cf9d71612669ce84d101c8135e
- "hodec2: add low-rxqual-assignment penalty timer (2/2)"
Id00a07313fe04eec509b336c0637b59c707760e0
Related: SYS#5198
Change-Id: Ia6b5696adef7e7bf649473b4d79b96acf3aa59e3
In expect-ts-use, indicate a busy lchan with letter '!'.
The code is a bit complex because of the choice made earlier to show two
TCH/H subslots as "TCH/HH", "TCH/H-" or "TCH/-H" depending on the
subslot states:
- show "-" as a shorthand for "all subslots UNUSED"
- show a "TCH/" prefix only when there is any "H" or "F" following, i.e.
when any subslot is actually established
- if a subslot is busy (any other state besides ESTABLISHED and UNUSED),
indicate the subslot as '!'.
The spectrum of reported state strings for TCH/F is:
TCH/F ! -
For TCH/H:
TCH/HH TCH/H- TCH/-H TCH/H! TCH/!H !- -! -
The only current test affected is test_penalty_timer.ho_vty, where a
failed handover leaves an lchan in LCHAN_ST_WAIT_AFTER_ERROR. Adjust
that test.
Rationale: I will soon add tests to verify the accurate timeout of a
handover2 penalty timer. While implementing, I noticed that immediate
retry of the handover ends up in timeslot 2, because timeslot 1 is still
in WAIT_AFTER_ERROR. Instead of working around that, I would like to
explicitly show the error state in the test -- it is an important
aspect.
Related: SYS#5198
Change-Id: I735ce7e2c3e0e450d3f76047d7e47691fe889cad
Fix for:
handover_test.c: In function 'res_ind':
handover_test.c:1094:30: error: 'ts_str' may be used uninitialized in this function [-Werror=maybe-uninitialized]
char subslot_val = ts_str[lchan->nr];
Fixes: f76424 ("RES IND: add test_resource_indication.ho_vty")
Change-Id: I398ba24b945bad96896eeb5ddbaff9c48bacf8ab
In lchan_select, do not return on the first available lchan, but iterate
through all available lchans. Among those that would match, pick the one
with the lowest interference level as indicated by earlier RES IND.
Lchans that have no interference ratings are picked last.
This feature is off by default, enable per BTS with
network
bts N
channel allocator avoid-interference 1
osmo-bsc still does the same ascending/descending lchan allocation as
before this patch with the default setting of:
channel allocator avoid-interference 0
Related: SYS#5313
Change-Id: I844494092193811dfd9fa4d52983cbaed0fc9248
Show that osmo-bsc does not yet take Resource Indication's reported
interference levels into account. (An upcoming patch will change that.)
This test is not actually doing any handover, but it is using the
handover/*.ho_vty scripting that was intended for handover testing.
(Like test_dyn_ts_favor_half_used_tch_h_as_target.ho_vty does.)
Related: SYS#5313
Change-Id: I56ec61196a1e103f0b4caf18d25d8222bb82cf87
Store the config option whether the channel allocator should try to
avoid lchans with higher interference levels reported in RES IND.
The actual implementation of avoiding interference follows in
I844494092193811dfd9fa4d52983cbaed0fc9248
Related: SYS#5313
Change-Id: I8b62d0b41ad9e908b27713db9219e3dbc1ebaab7
Add TDMA_MEAS_SET_AUTO to indicate automatic choice between FULL and
SUBSET measurements depending on DTX. So far use only in hodec2.
TDMA_MEAS_SET_AUTO looks at each individual measurement report's DTX
flag and for each report chooses FULL if DTX is not used, or SUB if DTX
is used.
The default setting for 'handover2 tdma-measurement' is still 'subset'.
To use the automatic choice, users need configure
handover2 tdma-measurement auto
Change-Id: I67dce55ccf892c8679272ee5dfedc25620f0f725
They will gain support to be activated as SDCCH/8 soon too.
Related: OS#5309
Depends: libosmocore.git I56dcfe4d17899630b17f80145c3ced72f1e91e68
Change-Id: Id5b89fe589a52ff88486435ac43809edb4b80f98
The BCCH carrier (sometimes called C0) of a BTS shall maintain
discontinuous Downlink transmission at full power in order to
stay 'visible' to the mobile stations. Because of that, early
versions of 3GPP TS 45.008 prohibited BS power reduction on C0.
However, starting from version 13.0.0 (2015-11) there is a feature
called 'BCCH carrier power reduction operation'. This is a special
mode of operation, where the variation of RF level for some
timeslots is relaxed for the purpose of energy saving.
In BCCH carrier power reduction operation, for timeslots on the
C0 carrier, except timeslots carrying BCCH/CCCH, the output power
may be lower than the output power used for timeslots carrying
BCCH/CCCH. In this case the maximum allowed difference in output
power actually transmitted by the BTS is 6 dB.
Introduce a VTY command to turn on and off the BCCH carrier power
reduction operation. Also introduce a CTRL command. On the
A-bis/RSL, abuse the BS POWER CONTROL message by setting
the Channel Number IE to 0x80 (RSL_CHAN_BCCH).
Currently, only osmo-bts-trx is supported. A value greater than
zero makes it reduce the power on *inactive* timeslots of the
BCCH carrier. Sending zero disables the BCCH power reduction
mode completely.
For more details, see 3GPP TS 45.008, section 7.1, and 3GPP TR 45.926.
Change-Id: I047fce33d4d3e4c569dd006ba17858467a2f4783
Related: SYS#4919
The constant is called OSMO_NRI_BITLEN_DEFAULT, NRI_BITLEN_DEFAULT does
not exist and got rendered as "NRI_BITLEN_DEFAULT" in the vty doc.
Add missing vty test for 'nri bitlen'.
Change-Id: I8af840a4589f47eaca6bf10e37e0859f9ae53dfa
The AFS bias actually should not apply to local cell lchans, because it
makes no sense for intra-cell considerations:
- same-cell lchans obviously have identical rxlev;
- any nonzero AFS bias thus always raises the TCH/F above the TCH/H;
- for intra-cell reassignment, the power budget hysteresis is,
naturally, not applied.
So, before this patch, setting AFS bias even to only 1 would
unconditionally move all (AMR) TCH/H lchans over to free TCH/F lchans in
the same cell.
Recent patch Id40d1cf8b58410c7d4eb87407fe8b8106e352438 implements
explicit upgrade from TCH/H to TCH/F *if* the TCH/H is experiencing low
rxqual or low rxlev, as a proper replacement for intra-cell AFS bias.
Related: SYS#5198 SYS#5365
Change-Id: I315f24123ae016887ab91666870ce252e096f90f
Pass flag into find_alternative_lchan() indicating that a TCH/H channel
has low ratings (rxqual or rxlev, doesn't matter).
Heed this flag in the last round, the requirement A check, and allow
candidates that have equal rxlev, if they result in an upgrade from
TCH/H to TCH/F. This allows intra-cell upgrades to TCH/F.
An important point is that this patch allows upgrade to TCH/F *without*
the AFS bias setting. See also I315f24123ae016887ab91666870ce252e096f90f.
Related: SYS#5198 SYS#5365
Change-Id: Id40d1cf8b58410c7d4eb87407fe8b8106e352438
Add VTY command to trigger an intra-cell re-assignment, also allowing to
re-assign to a secondary VAMOS lchan.
Related: SYS#5315 OS#4940
Change-Id: If006f5caaf83b07675f57e5665cfa79328da55e6
Add the Osmocom-specific extension to indicate VAMOS shadow lchans in
RSL, in lchan lookup and RSL message transmission.
Note that RR messages containing cbits (Assignment Command, Handover
Command, ...) must *not* send Osmocom specific cbits to the MS. Only the
RSL messages directed to the BTS send Osmocom specific bits.
Related: SYS#5315 OS#4940
Depends: If33c1695922d110c0d2c60d5c0136caf2587194e (libosmocore)
Change-Id: I957eff0d2c33ec795eda75a4bff21965b0179f73
It's bad to abort the program for an incompatible chan_nr. Instead of
OSMO_ASSERT(), make sure that error handling happens all they way to the
original callers of gsm_lchan2chan_nr etc.
This is also preparation to add further error causes: Osmocom specific
cbits needed for a non-Osmo BTS.
Related: SYS#5315 OS#4940
Change-Id: I71ed6437c403a3f9336e17a94b4948fca295d853
A subsequent patch will add to this VTY command, so let's first test the
current status as a baseline.
Change-Id: I6379e306fb8fa6ec227125c6cf14893d674e7596
This fixes handover oscillation in the presence of power reduction on
the downlink: apply the reduced power to the cell's RXLEV in order to
not rate the current cell as weaker than it actually is.
Related: SYS#5339
Change-Id: Ifcf59964b5e2d550d79e4ba14d90962808f79dae
According to 3GPP TS 45.008, the BSS shall monitor the levels of
interference on its IDLE traffic channels. The actual measurements
are performed in the BTS and then reported to the BSC over the
A-bis/RSL link(s) in RF RESource INDication messages.
3GPP TS 45.008 defines the following measurement parameters:
* Intave: Interference Averaging period (see table A.1),
* Interference level Boundaries (see table A.1).
Both parameters are sent to the BTS over the A-bis/OML, and can
now be configured via the VTY interface. Only those BTS models
which 'speak' the OML protocol defined in 3GPP TS 52.021 will
actually get the configured parameters, others will keep using
the hard-coded parameters.
Change-Id: I99ebf57aac1f3ca7e0497c3b4f6b0738c6ed7e47
Related: SYS#5313, OS#1866
This code is available in libosmocore since ~3 years ago
(fdf8b7b1beeb0cda262c5fb060a933aa7edb5e9a). Let's use it instead of
maintaining duplicated code which diverges over time.
Depends: osmo-bsc.git Iae058c35506bc25c9f4790889b89ac46aea664b6
(contains cherry-pick of bug fixed in osmo-bsc.git).
Change-Id: I53ad3067623077b6a8737c2a0aecc8b46bf71a15
So far we have a couple of macros iterating a specific number of lchans,
depending on dynamic timeslot state etc. With addition of VAMOS lchans,
this would become more complex and bloated.
Instead of separate iteration macros for each situation, only have one
that takes a number of lchans as argument. That allows to more clearly
pick the number of lchans, especially for non-trivial VAMOS scenarios.
Related: SYS#5315 OS#4940
Change-Id: Ib2c6baf73a81ba371143ba5adc912aef6f79238d
So far the number of usable lchans is determined on-the-fly by the
physical channel config. With VAMOS, this becomes more complex, namely
determining whether the BTS is vamos capable.
Instead of calling a function to determine the number of lchans for
every use, rather place the number of valid lchans in int members of the
timeslot struct, and initialize those during timeslot setup.
Actual use of these new fields will follow in a subsequent patch, which
introduces the ts_for_n_lchans() macro to replace current lchan
iteration macros.
Related: SYS#5315 OS#4940
Change-Id: I08027d79db71a23e874b729c4e6173b0f269ee4f
Prepare for VAMOS, where there will be secondary "shadow" lchans serving
secondary MS on the same timeslots. For those, RSL messages will need to
reflect a different stream ID aka TEI, via an rsl_link_vamos.
Make sure that every code path that sends an RSL message for a specific
lchan selects the RSL link via the new function rsl_chan_link(). When
VAMOS is implemented, this function can select the proper RSL stream.
Rename gsm_bts_trx.rsl_link to rsl_link_primary. This makes sure I'm not
missing any uses of the RSL link, and clarifies the code.
Related: SYS#5315 OS#4940
Change-Id: Ifbf16bb296e91f151d19e15e39f5c953ad77ff17
So far we do all channel reassignments by Handover Command. Since
osmo-bsc now supports rassignment of ongoing voice calls, do intra-cell
congestion resolution by Assignment Command.
In effect, add support for expecting an Assignment Command in
handover_test, and expect assignments instead of handovers for
intra-cell congestion resolution test cases.
Related: SYS#5330 OS#3277
Change-Id: Id56a890106b93fcee67ac9401b890e7b63bba421
Firstly, do not store the encoded AMR length-value bits in gsm_lchan->*
before an activation/modify has actually succeeded.
And secondly, do not store the AMR LV structure in struct gsm_lchan at
all, but only generate the TLV exactly when a message is being composed.
In gsm48_multirate_config(), generate the LV directly to a msgb instead
of a static buffer first. gsm0408_test.c expected output verifies that
the generated LV bytes remain unchanged.
In lchan_mr_config(), introduce a target mr_conf argument, so that Chan
Act and Mode Modify may generate the filtered AMR config to different
locations (lchan->{activate,modify}.mr_conf_filtered).
Only after receiving an ACK for Activate/Modify, set
lchan->current_mr_conf from lchan->{activate,modify}.mr_conf_filtered.
Use the properly scoped lchan->activate.mr_conf_filtered for Chan Act,
lchan->modify.mr_conf_filtered for Mode Modify and
new_lchan->current_mr_conf for Handover Command as appropriate.
Related: SYS#5315 OS#4940 OS#3787 OS#3833
Change-Id: Ie57f9d0e3912632903d9740291225bfd1634ed47
I noticed during testing that an lchan used as TCH/F in fact still had
its channel mode set to Signalling -- because on Assignment, the Speech
mode used to be placed in the *previous* lchan and the new lchan was
never updated after the Activ ACK. This is unbearable confusion which I
complained about numerous times, so far mostly for cosmetic reasons. But
implementing re-assignment properly actually requires this to be cleaned
up.
Keep all volatile chan mode settings in lchan->activate.* or
lchan->modify.*, and only update lchan->* members when an ACK has been
received for those settings. So a failed request keeps a sane state.
Make sure that those settings are in fact updated in the proper lchan,
upon an ACK, so that subsequent re-assignment or mode-modify know the
accurate lchan state.
Related are upcoming patches that sort out the AMR multirate
configuration in a similar fashion, see
Iebac2dc26412d877e5364f90d6f2ed7a7952351e
Ia7519d2fa9e7f0b61b222d27d077bde4660c40b9
Ie57f9d0e3912632903d9740291225bfd1634ed47.
Related: SYS#5315 OS#4940 OS#3787 OS#3833
Change-Id: Ie0da36124d73efc28a8809b63d7c96e2167fc412
Shows a bug / missing feature, to be fixed in
Ifcf59964b5e2d550d79e4ba14d90962808f79dae
Related: SYS#5339
Change-Id: I1cc9bc39e8695faa983819b909e0ec76f0dbc296
Subsequent patch will add a test that uses this to show a handover
oscillation problem in the presence of nonzero BS Power.
Related: SYS#5339
Change-Id: I158d4b27370ab19318f83018803853f423c89b79
In osmo-bsc, gsm48_multirate_config() is used in a way where the struct
amr_mode *modes always points at the full set of configured modes, and
only the AMR bits m4_75 thru m12_2 are unset to filter the used modes.
In the current test, the bits are unset to filter, but also the struct
amr_mode *modes is reduced accordingly. Instead, keep the modes fully
populated and unset only bits, like osmo-bsc does in practice.
The test results should not (and do not) differ.
Change-Id: I545de6fb66a4b74a3f08899795b4b4d9c4538f58
It's acceptable to verify an outcome by printing to an expected output.
It's unacceptable to commit those expected outputs without first
verifying that they are in fact correct!
In this case, the output has obviously not been even read, since the
length byte clearly indicates that one byte is missing from each buffer
dump.
I have now verified by hand against 3GPP TS 44.018 that each one of the
generated octets are indeed correct.
Change-Id: I92fcc7afe018a4a8dc91f0f2167e3a7835f623c9
Pau Espin
Oliver Smith
Vadim Yanitskiy
Neels Hofmeyr
Philipp Maier
Neels Hofmeyr
Keith Whyte