osmo-ttcn3-hacks/bts
Vadim Yanitskiy 6ff06a301b BTS_Tests: fix TC_conn_fail_crit: tune the MS back to BCCH
osmo-bts-trx declares a connection failure when the radio link counter
S reaches 0.  This counter is decreased every time the Viterbi decoder
yields a decoding error on the Uplink SACCH.  For more details, see
3GPP TS 45.008, section 5.2.

The scheduler in osmo-bts-trx expects NOPE indications to be sent by
the transceiver in the absence of valid Uplink bursts.  However, due
to the asynchronous nature of TRXD link, our virtual Um interface
implementation, fake_trx.py, does not generate NOPE indications on
it's own.  Instead, trxcon is sending empty TRXDv0 PDUs (BURST.req),
which are then translated to proper TRXDv1 NOPE.ind by fake_trx.py.

The TC_conn_fail_crit currently sends L1CTL_DM_REL_REQ in order to
simulate connection loss, what makes trxcon disable all active
timeslots and thus stop sending NOPE.req to fake_trx.py.

Let's tune trxcon back to BCCH, in order to ensure that NOPE.req
messages are still being sent, so that osmo-bts-trx will be able
to declare a connection failure over the RSL as expected.

Change-Id: I34aee95111eafea90eeeea861682f1b4547d7b03
Related: Ic292d180ba64206fb4d88adb284f9f9d058b4587
2022-11-01 00:02:00 +07:00
..
BTS_Tests.cfg bts: Test forwarding PCUIF<->IPA/OSMO/PCU 2021-06-28 10:43:21 +02:00
BTS_Tests.default BTS_Tests: re-organize configuration of TRX/TS params 2020-11-24 11:58:49 +01:00
BTS_Tests.ttcn BTS_Tests: fix TC_conn_fail_crit: tune the MS back to BCCH 2022-11-01 00:02:00 +07:00
BTS_Tests_LAPDm.ttcn BTS_Tests: make TRX number configurable for ConnHdlr 2021-10-31 21:47:14 +03:00
BTS_Tests_OML.ttcn pcu: Support Neighbor Address Resolution over PCUIF 2021-09-14 09:11:14 +00:00
BTS_Tests_SMSCB.ttcn BTS_Tests_SMSCB: ensure f_shutdown() is called in all test cases 2021-06-30 08:01:09 +00:00
BTS_Tests_VAMOS.ttcn BTS_Tests[_VAMOS]: use default param values for ts_RSL_MultirateCfg 2022-09-14 16:47:18 +07:00
BTS_Tests_perf.ttcn bts/BTS_Tests: add frequency hopping parameters 2020-05-29 22:33:13 +07:00
README.md Update README.md of several TTCN3 test suites 2019-11-15 18:49:09 +00:00
expected-results.xml bts: update expected-results.xml 2022-08-30 19:46:15 +07:00
gen_links.sh bts: Add testscase & infra to validate Osmux support BTS<->BSC 2022-09-13 11:20:11 +00:00
osmo-bsc.cfg bts/osmo-{bsc,bts}.cfg: tune logging configuration 2021-12-14 12:59:04 +00:00
osmo-bts.cfg bts: Add testscase & infra to validate Osmux support BTS<->BSC 2022-09-13 11:20:11 +00:00
regen_makefile.sh bts: Add testscase & infra to validate Osmux support BTS<->BSC 2022-09-13 11:20:11 +00:00

README.md

BTS_Tests.ttcn

  • external interfaces
    • A-bis side: RSL (emulates BSC-side server)
    • Um side: L1CTL to control MS
    • PCU side: pcu_socket
    • VTY
    • CTRL

{% dot bts_tests.svg digraph G { rankdir=LR; { rank=same; BTS, BSC}; BTS [label="IUT\nosmo-bts-trx",shape="box"]; ATS [label="ATS\nBTS_Tests.ttcn"]; BSC [label="osmo-bsc\nOML only"]; BTS -> fake_trx [label="bursts"]; fake_trx -> trxcon [label="bursts"]; trxcon -> ATS [label="GSM MAC blocks"];

BTS -> BSC [label="A-bis OML"]; BTS -> ATS [label="A-bis RSL"];

ATS -> BTS [label="pcu_sock"]; ATS -> BSC [label="VTY"]; ATS -> BTS [label="CTRL"]; } %}