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.