This is an Osmocom specific RSL IE that, if present, takes
precedence over the values indicated via the A-bis/OML.
Change-Id: I717e5b2a6ca5b4faeaab9cae4bb971907945871b
Related: SYS#4895, OS#4941
Each timeslot can have its own Training Sequence Code value, which
may optionally be included in the NM_MT_SET_CHAN_ATTR message sent
over the A-bis/OML. If it's not present, then the TSC value for a
timeslot is derived from the BCC part of BSIC, which is always
included in the NM_MT_SET_BTS_ATTR message.
On the TRXC interface, the BTS global TSC value is indicated to the
transceiver using either of the 'SETTSC' or 'SETBSIC' commands.
The transceiver then applies this value for all timeslots by default,
however it can be redefined for each timeslot individually using
additional arguments of the 'SETSLOT' command (see section 25.2.4.1
in the user manual [1] for more details).
Currently, trx_set_ts_as_pchan() sends TRX_PROV_EV_CFG_TSC to the
transceiver provisioning FSM, together with the per-timeslot TSC
value. This event causes the FSM to modify the global TSC value,
that is going to be or has already been sent to the transceiver.
This is wrong, the global TSC value shall not be overwritten.
Remove the TRX_PROV_EV_CFG_TSC, and include per-timeslot Training
Sequence Code and Set in the data structure that gets passed together
with the TRX_PROV_EV_CFG_TS instead. Implement handling of the
optional per-timeslot TSC in trx_if_cmd_setslot().
[1] https://downloads.osmocom.org/docs/latest/osmobts-usermanual.pdf
Change-Id: Idc5796151e3e83f42d60c2d4cb7c35890d76a7f5
Related: SYS#4895, OS#4941
The TSC (Training Sequence Code) value in 'struct gsm_bts_trx_ts'
is always initialized in oml_rx_set_chan_attr() during the OML
bootstrapping, so there is no need for gsm_ts_tsc() - remove it.
Store the initial TSC value in 'struct gsm_bts_trx_ts', so we can
apply a different TSC value during the RSL CHANnel ACTIVation.
Store the Training Sequence Code/Set in 'struct trx_dl_burst_req'.
These values are indicated to the transceiver (TRXDv2 PDUs, 'MTS'
field) and used by the new TRX_{GMSK,8PSK}_NB_TSC macros.
Change-Id: I3744bc308b99ef941e6e9d139444e414abebc14b
Related: SYS#4895, OS#4941
The model name when used when abis_open() is called is sysmoBTS, since
we recently decided to deprecate the type name "sysmobts" in osmo-bsc we
might consider the same thing here.
Change-Id: I3c61d92f5527ae0145316b5ff92660f8b467a8dc
Ensure that we check the PHY capabilities in both cases:
* RSL CHANnel ACTIVation, and
* RSL CHANnel MODE MODIFY,
by calling bts_supports_cm() from rsl_handle_chan_mod_ie().
Modify bts_supports_cm() to accept a 'struct rsl_ie_chan_mode',
so we can handle VAMOS enabled channel modes and CSD later on.
Change-Id: I31a444592436705ec9d6ddade3cbfa7f8cb4bb91
Related: SYS#5315, OS#4940
For some reason, handling of the Channel Identification IE was done
in l1sap_chan_act(). This function is being called on reciept
of the CHANnel ACTIVation message, but not on MODE MODIFY.
Change-Id: I07f95e69e6230a1daca62cc0a7c64954f191fa8a
Related: SYS#5315, OS#4940
This change implements TRXD PDU batching approach b), which is described
in section 25.3.4 of the user manual [1]. This approach is quite easy
to implement on the transceiver side, so we can enable it by default.
.Example: datagram structure for combination b)
----
+--------+----------------+---------+------------------------+
| TRXN=N | TDMA FN=F TN=0 | BATCH=1 | Hard-/Soft-bits |
+--------+----------------+---------+------------------------+
| TRXN=N | TDMA FN=F TN=1 | BATCH=1 | Hard-/Soft-bits |
+--------+----------------+---------+------------------------+
| TRXN=N | TDMA FN=F TN=2 | BATCH=1 | Hard-/Soft-bits |
+--------+----------------+---------+------------------------+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+--------+----------------+---------+------------------------+
| TRXN=N | TDMA FN=F TN=7 | BATCH=0 | Hard-/Soft-bits |
+--------+----------------+---------+------------------------+
----
Other PDU batching approaches can be introduced later.
[1] https://downloads.osmocom.org/docs/latest/osmobts-usermanual.pdf
Change-Id: I9b4cc8e10cd683b28d22e32890569484cd20372d
Related: SYS#4895, OS#4941
The path to the temperature sensor was wrong which
results in the SysmoBTS manager always considering
that the state is critical and hence powering OFF
the PA on startup. (with the default config)
As a further side-effect, the temperatures were not
available in the vty 'show manager' command.
Redacted log previous to this patch:
sysmobts_misc.c:128 Error reading temperature
sysmobts_mgr_2050.c:323 Going to enable the PA.
sysmobts_mgr_temp.c:252 Failed to read the digital temperature. rc=-1
sysmobts_mgr_temp.c:267 Failed to read the RF temperature. rc=-1
sysmobts_mgr_temp.c:203 Moving from state NORMAL to CRITICAL.
sysmobts_mgr_temp.c:185 System has reached critical warning.
sysmobts_mgr_temp.c:236 OML alert sent: 0
and in the vty:
Temperature control state: CRITICAL
Current Temperatures
Digital: -0.001000 Celsius
RF: -0.001000 Celsius
With this patch we correctly enable the PA and now can show in the vty:
Temperature control state: NORMAL
Current Temperatures
Digital: 39.000000 Celsius
RF: 35.125000 Celsius
Change-Id: Iac8e9a866ad6326874af91bd12a981f39a9a24c7
In [1] I forgot to update tx_fcch_fn(), where we assume that the
burst buffer is already zero-initialized and do not call memset().
This results in sending dummy bursts on FCCH (instead of zeros).
Change-Id: I491b3b5702b3cfca45c12c002b41e60c629b05b9
Fixes: [1] Iec78989517865b3275a9784d1042a5ebd1d2815f
Currently, in bts_sched_fn() we send a Downlink burst to the PHY
immediately after calling the associated logical channel handler.
Together with the obvious performance advantages, this approach
imposes some serious limitations. The code has already become
quite complex with the introduction of the baseband frequency
hopping, and now it's not possible anymore to extend it further.
TRXD PDU batching, which is essential for VAMOS implementation,
requires us to make the scheduler more flexible at the expense of
increased memory consumption and additional CPU cycles. This patch
splits up Downlink burst scheduling into 3 main steps:
1. bts_sched_init_buffers(): initialization of per-TRX Downlink
burst buffers allocated by phy_instance_create(). For C0/TRX0
all timeslots are pre-initialized with dummy burst.
2. bts_sched_fn(): generating burst bits for all active lchans.
3. bts_sched_flush_buffers(): sending everything to the PHY.
This approach allows us to a) get rid of the ugly tail in bts_sched_fn()
that was responsible for sending dummy bursts on C0/TRX0; b) implement
the PDU batching and have several variants of bts_sched_flush_buffers()
providing the alternative batching approaches later on; c) implement
PDU merging for the upcoming shadow transceivers.
Change-Id: Iec78989517865b3275a9784d1042a5ebd1d2815f
Related: SYS#4895, OS#4941
BCC takes 3 LSB bits of the BSIC, so we should apply 0b111 or 0x07.
The BSIC is specified in 3GPP TS 03.03 section 4.3.2.
Change-Id: Id24ad64e6c6de080ab43faa272daf844fbba6954
Related: SYS#5315, OS#4940
We assume that it's legal to have dangling PHY instances that are
not associated with any TRX instances in the configuration file.
Obviously, such PHY instances have pinst->trx set to NULL.
The DSP based models seem to handle dangling PHY instances without
any problems, so let's ensure that we always check pinst->trx
against NULL in the osmo-bts-{trx,virtual} specific code.
Change-Id: Ib7d9cb7ae47fead723fa46454cd64bf6e88756bb
Fixes: CID#236092 "Dereference before null check"
Together with the 'generic' structures which used to be shared between
osmo-bsc and osmo-bts some time ago, we also have the following
osmo-bts-trx specific structures (in hierarchical order):
- struct l1sched_trx (struct gsm_bts_trx),
- struct l1sched_ts (struct gsm_bts_trx_ts),
- struct l1sched_chan_state (struct gsm_lchan).
These structures are not integrated into the tree of the generic
structures, but maintained in a _separate tree_ instead. Until
recently, only the 'l1sched_trx' had a pointer to generic
'gsm_bts_trx', so in order to find the corresponding 'gsm_lchan' for
'l1sched_chan_state' one would need to traverse all the way up to
'l1sched_trx' and then tracerse another three backwards.
+ gsm_network
|
--+ gsm_bts (0..255)
|
--+ l1sched_trx --------------------> gsm_bts_trx (0..255)
| |
--+ l1sched_trx_ts --+ gsm_bts_trx_ts (8)
| |
--+ l1sched_chan_state --+ gsm_lchan (up to 8)
I find this architecture a bit over-complicated, especially given
that 'l1sched_trx' is kind of a dummy node containing nothing else
than a pointer to 'gsm_bts_trx' and the list of 'l1sched_trx_ts'.
In this path I slightly change the architecture as follows:
+ gsm_network
|
--+ gsm_bts (0..255)
|
--+ gsm_bts_trx (0..255)
|
--+ l1sched_trx_ts <----------------> gsm_bts_trx_ts (8)
| |
--+ l1sched_chan_state --+ gsm_lchan (up to 8)
Note that unfortunately we cannot 1:1 map 'l1sched_chan_state' to
'gsm_lchan' (like we do for 'l1sched_trx_ts' and 'gsm_bts_trx_ts')
because there is no direct mapping. The former is a higl-level
representation of a logical channel, while the later represents
one specific logical channel type like FCCH, SDCCH/0 or SACCH/0.
osmo-bts-virtual re-uses the osmo-bts-trx hierarchy, so it's also
affected by this change.
Change-Id: I7c4379e43a25e9d858d582a99bf6c4b65c9af481
In change [1] together with the actual implementation I introduced
a serious bug to bts_sched_fn(): if a timeslot is configured to use
frequency hopping, both 'pinst' and 'l1h' pointers are *overwriten*
in the inner loop, so the Downlink burst is re-directed to the
approproate PHY instance. However, if a subsequent timeslot is not
hopping, the Downlink burst would be re-directed to the wrong PHY
instance because both pointers were overwriten during a previous
iteration.
Let's move the 'struct phy_instance' pointer to the inner loop, so
it's properly re-initialized for each timeslot iteration.
Change-Id: I9afbbef8dc5d885763356470c27d4392dce8e815
Fixes: [1] I68f4ae09fd0789ad0d8f1c1e17e17dfc4de8e462
Related: SYS#4868, OS#4546
trx_phy_instance() does assert() that the given TRX pointer is
not NULL. In bts_sched_fn() it can never be NULL, so drop it.
Change-Id: I896ff5117588f2229cc54619ce62fd027a9ef25f
lower layer specific APIs require first to enable the TRX object
(GsmL1_PrimId_MphInitReq, which requires ARFCN received during Set
Radio Carrier Attributes) before enabling the per-TS structure.
Hence, OPSTART must happen in RCARRIER MO before OPSTART can be sent to
the Radio Channel MOs, otherwise the initialization of the TS objet will
fail and OPSTART for the RadioChannel MO will send back a NACK.
In order to avoid this, we need to keep the RadioChannel MO announced as
"Disabled Dependency" until RCARRIER is OPSTARTed.
Related: OS#5157
Change-Id: I8c6e5ff98c32a3cd5006f5e5ed6875bcabb1d85f
Historically the logical channel handlers like rx_data_fn() used to accept
quite a lot of arguments. With the introduction of additional measurement
parameters it has become clear that we need to group the arguments into
structures. This is why both 'trx_{dl,ul}_burst_{req,ind}' structures
were introduced.
However, both channel type and burst ID were kept untouched, so until
now we had them being passed between the scheduler functions here and
there. This change is a logical conclusion of the original change
mentioned above.
As a part of this change, the new LOGL1SB() macro is introduced. It
does accept a pointer to 'trx_{dl,ul}_burst_{req,ind}' and expands the
context information for the old LOGL1S() macro.
Change-Id: Ic5a02b074662b3e429bf18e05a982f3f3e7b7444
gsm_bts_trx_alloc() already does initialize some fields of the
allocated 'struct gsm_bts_trx' instance, and having an additional
function for initializing the other fields makes no sense.
Note that I intentionally didn't merge a call to bts_model_trx_init()
into gsm_bts_trx_alloc(), because this would break some assumptions
regarding the order of initialization and cause regressions.
This also allows us to not call bts_model_trx_init() from tests.
Change-Id: I4aefaf47b05a67ec0c4774c1ee7abcc95e04cc13
First of all, there is no reason to use a void pointer because
it's always 'struct phy_instance'. Also, no need to encapsulate
this pointer into 'role_bts' because there are no other roles in
osmo-bts (we used to have shared headers years ago).
This commit also fixes a bug in test_sysmobts_auto_band(), where a
pointer to 'struct femtol1_hdl' was directly assigned to trx.pinst.
Change-Id: I9bd6f0921e0c6bf824d38485486ad78864cbe17e
For a long time, we see this annoying -Wstringop-truncation warning:
In function ‘parse_rsp’,
inlined from ‘trx_ctrl_read_cb’ at trx_if.c:647:6:
trx_if.c:416:2: warning: ‘strncat’ output may be truncated copying
between 0 and 45 bytes from a string of length 1495
416 | strncat(rsp->cmd, buf_in + 4, p - buf_in - 4);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
There is no real need to use strncat() in parse_rsp(), because we
do not concatenate any strings but simply copy TRXC response parts
from the input buffer to the corresponding 'name' and 'parameters'
buffers. Let's use memcpy() instead. This also fixes the warning.
Change-Id: Ia10adf7d76abe9a423b07e828852fbfb53b95125
We need curly braces becausee1inp_line_get2() is basically a macro
that calls OSMO_ASSERT(), which in its turn contains an 'if' stmt.
Change-Id: I41a5fd13a7fa40e16bcf1a8099624b654274cee3
If the PHY is not powered on and we are not supposed to send any
bursts to it, then trx_if_send_burst() should just return early.
Change-Id: I578bd5a731ad88ebff283c75bb7eb268d9e7e787
Related: SYS#4895, OS#4941, OS#4006
Vadim Yanitskiy
Pau Espin
Philipp Maier
Keith Whyte