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
Automatic generation of a header file using a C program built during
build of osmo-bts creates several problems when cross-compiling.
The generated header file is only 59 lines long, so let's have it
generated in order to avoid having to call the helper program every
time.
A Makefile target is added to easily regenerate the file manually in
case it's needed:
make -C contrib/ber/ update_codec_bit_class_h
Fixes: acf0f0f0bb
Change-Id: I97efdb4ee00537fcae191b4267d0211d582ef372
This implements RTP based GSM BER testing for osmo-bts, implementing
ideas described in https://osmocom.org/projects/osmobts/wiki/BER_Testing
In short: The command transmits a PRBS sequence encapsulated in RTP
frames, which are sent to the BTS, which transmits that data in the
(unimpaired) downlink. The mobile station receives the data and is
instructed to loop it back in the (possibly impaired) uplink. The BTS
receives that uplink, puts in in RTP frames which end up being received
back by this very tool. By correlating the received RTP with the PRBS
sequence, this tool can compute the BER (Bit Error Rate) of the
(possibly impaired) uplink. Doing this with different RF channel model
simulators in the uplink allows to establish BER at different levels and
channel conditions.
Original code by Sylvain Munaut extended with some comments and Automake
integration by Harald Welte.
Change-Id: I1cffa0ae959e29ec61775b13185fd1057ed7485a
We already have MS Power Control, which according to 3GPP 45.008
shall be implemented in the MS to minimize the transmit power in
the Uplink direction. The BS Power Control may optionally be
implemented by the network side for the same purpose.
Using Downlink signal measurements reported by the MS, the BSS
(either BSC, or BTS) may control Downlink attenuation in a way
that the transmit power remains as low as possible, or remains
in a specific range corresponding to good RxLev values on the
MS side. This change implements autonomous BS Power Control,
that can optionally be enabled by the BSC.
BS Power Control re-uses parts of the MS Power Control code,
so all parameters can be configured in the same way - via the
VTY interface or a configuration file. This basically means
that features like hysteresis and EWMA based filtering are
also available for BS Power Control.
The only difference is that RxQual values higher than 0 would
trigger the logic to reduce the current attenuation twice.
Note that one of the unit tests ('TC_rxlev_max_min') fails,
as the power step limitations for raising and lowering look
wrong to me, and the related discussion is still ongoing.
Change-Id: I5b509e71d5f668b6b8b2abf8053c27f2a7c78451
Related: SYS#4918
Unfortunately, we cannot re-use the existing Makefile rules from:
$(OSMO_GSM_MANUALS_DIR)/build/Makefile.vty-reference.inc
because they do not allow to generate the list of $(DOCBOOKS) from
a template, and require the project to store everything in separate
folders with specific names. Also, those rules expect that the
target PDFs contain only a single word in their names (for example,
'osmoapp-vty-reference', not 'osmo-app-vty-reference'), while in a
project with multiple similarly named targets this would reduce
readability (imagine 'osmotrxuhd-vty-reference').
Change-Id: Idba84164b90e3d183a20b5eb69cbfe15745e447c
Depends: I6aac73d998c5937894233631e654a160d5623198
Related: SYS#4937, SYS#4910, OS#3036
The binary is called 'osmo-bts-lc15', while the containing folder
is named 'osmo-bts-litecell15'. This inconsistency complicates
automatic generation of the XML VTY reference - fix it.
Change-Id: I55c073fbd01aee42871101401d76d87e7c91832e
Related: SYS#4937, OS#3036
Remove OpenSUSE bug report link, set version to @VERSION@, make it build with
CentOS 8 etc.
Related: OS#4550
Change-Id: Ia160d1a04b95e9efeb6c26eabd28c3697968d177
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
Moved to doc/manuals/, with full commit history, in preceding merge commit.
Now incorporate in the build system.
Build with:
$ autoreconf -fi
$ ./configure --enable-manuals
$ make
Shared files from osmo-gsm-manuals.git are found automatically if
- the repository is checked out in ../osmo-gsm-manuals; or
- if it osmo-gsm-manuals was installed with "make install"; or
- OSMO_GSM_MANUALS_DIR is set.
Related: OS#3385
Change-Id: I728ebb56ade6dda079a0744c4e592284e1bea4f6
This is used only in integration testing, where in the TTCN-3 testsuite
we currently have no A-bis OML implementation, but only a RSL one.
Change-Id: Id8e5f34091e6e32621d8c8673de7ea848dfd252f
It's prerequisite for jenkins tests fix after migration to stow. The
sysmobts-calib uses hand-coded Makefile instead of automake which makes
it hard to properly propagate build flags. Also, make it optional to
enable excluding it from certain jenkins tests.
Change-Id: I3b54bfa5ef1d89092f6cf13dc27de10874b31b18
There's nothing sysmobts specific in this test so let's move it into
separate directory and run unconditionally. The test itself is unaltered
except for intro text.
Change-Id: I0d1957cd9cf5497826be095c7a42b7bb4fa10397
Related: OS#2223
This patch adds a virtual physical layer designed to simulate the
Um air interface between BTS and MS. It does so by encapsulating MAC
blocks (Layer 2 PDUs) via GSMTAP and sending them through multicast UDP
streams, both in uplink and in downlink.
The purpose of this is enable testing without any radio hardware or
related licenses.
OsmocomBB has recently received as similar patch-set, adding a virty_phy
executable that can be run on a PC instead of the classic 'layer1'
firmware on a real phone.
Using GSMTAP means that one can use unmodified wireshark to decode the
messages exchanged on the virtual Um layer.
This code was originally started by Harald in January 2016, continued
by Sebastian Stumpf in late 2016 and early 2017, and finally completed
by Harald in July 2017.
Change-Id: I1bf7670975b1e367c1c62983020865a043542622
After switching to libosmocoding there's no need in low-level bursts
test which is part of libosmocoding anyway.
Change-Id: Icb8caf62ac653a39a7a82f2225e8edeab7f5afb5
This tests the computations of the tx_power.c code using sysmoBTS 1002,
1020, 1100 and 2050 values, as well as the power ramping code.
Change-Id: I1cc88d4c6edff326e2e67d4f869aa02c9b2b1ac5
Also remove related cruft: .gitignore, msc-README and adjust an in-code
comment that referenced dyn_pdch.msc.
Change-Id: Ie41a453bb5070c1f18793f646dc053a978f43fba
Limit the range from 0 to (_MAX_SYSINFO_TYPE - 1) instead of
0 to 31. This way we will never access the lchan->si.buf[] out
of bounds. This is only a theoretical issue though as the code
filling the lchan->si.buf for the SACCH will not have valid
>= _MAX_SYSINFO_TYPE. Add a small regression test to check we
still schedule all SIs.
Fixes: CID 1040765
During development one switches from GSM900 to GSM1800 and GSM850 to
GSM1900. This commit attempts to make this switch more easy.
GSM1800 and GSM1900 have overlapping ARFCNs. This means that the
mapping from bands to arfcn is not injective. Because of that I
removed the code to deduce the band from the ARFCN. This was done
in commit 8c3d807b3f. The auto-band
option allows to move between GSM900/GSM1800 and GSM850/GSM1900.
Add a simple testcase with these auto-band configurations.
This was found and debugged by Sylvain. The BTS will always support
A5/0 so we do not keep track of that, the first bit of the flags is
used for A5/1, second for A5/2... but for RSL there is an offset to
go from RSL to A5(x). Add a testcase and change the code.
This daemon is taking care of counting the number of hours in operation
and to watch the system temperature as determined by internal
temperature sensors.
Later, it will export an external interface for firmware reload, as well
as a way to raise OML ALARMs in case of temperature issues or other
problems.
It has been tested with the OCXO and the network listen mode of the
firmware. For other sources we are not required to synchronize to
the network and the tool needs to be adjusted.
Check that adding a paging command works, check that it is expired
after the first call to paging_gen_msg. The test will be extended
to test the scheduling and selection of the various paging messages.
This code re-works osmo-bts to add support for the upcoming sysmocom BTS.
It also tries to add some level of abstraction between the generic
part of a BTS (A-bis, RSL, OML, data structures, paging scheduling,
BCCH/AGCH scheduling, etc.) and the actual hardware-specific bits.
The hardware-specific bits are currently only implemented for the sysmocom
femtobts, but should be (re-)added for osmocom-bb, as well as a virtual
BTS for simulation purpose later.
The sysmocom bts specific parts require hardware-specific header files
which are (at least currently) not publicly distributed.
Vadim Yanitskiy
Oliver Smith
Pau Espin
Sylvain Munaut
Philipp Maier
Harald Welte
Alexander Huemer
Max