<p>fixeria has uploaded this change for <strong>review</strong>.</p><p><a href="https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/20810">View Change</a></p><pre style="font-family: monospace,monospace; white-space: pre-wrap;">BTS_Tests: introduce TC_speech_no_rtp_{tchf,tchh}<br><br>The purpose of these new test cases is to demonstrate a problem<br>described in OS#4823: the IUT sends *dummy bursts* in absence of<br>MT RTP frames, so on the MS side it looks like RF failures.<br><br>It's not yet clear what needs to be sent instead, but at least<br>we can verify that the L1 (trxcon or Calypso PHY) is able to<br>decode all TCH (or FACCH) frames without CRC errors.<br><br>Change-Id: I620ea84ae92c976a62c1f8334ec14a2a7685aa21<br>Related: OS#4823<br>---<br>M bts/BTS_Tests.ttcn<br>1 file changed, 64 insertions(+), 0 deletions(-)<br><br></pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;">git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/10/20810/1</pre><pre style="font-family: monospace,monospace; white-space: pre-wrap;"><span>diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn</span><br><span>index cc38433..09a7a15 100644</span><br><span>--- a/bts/BTS_Tests.ttcn</span><br><span>+++ b/bts/BTS_Tests.ttcn</span><br><span>@@ -7072,6 +7072,67 @@</span><br><span> Misc_Helpers.f_shutdown(__BFILE__, __LINE__);</span><br><span> }</span><br><span> </span><br><span style="color: hsl(120, 100%, 40%);">+private function f_TC_speech_no_rtp(charstring id) runs on ConnHdlr {</span><br><span style="color: hsl(120, 100%, 40%);">+ var template L1ctlDlMessage tr_bad_frame;</span><br><span style="color: hsl(120, 100%, 40%);">+ var L1ctlDlMessage l1_dl;</span><br><span style="color: hsl(120, 100%, 40%);">+ timer T := 8.0;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_l1_tune(L1CTL);</span><br><span style="color: hsl(120, 100%, 40%);">+ RSL.clear;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_est_dchan();</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* There may be a few errors right after the channel activation */</span><br><span style="color: hsl(120, 100%, 40%);">+ f_sleep(2.0); /* ... so let's give the L1 some time to stabilize */</span><br><span style="color: hsl(120, 100%, 40%);">+ L1CTL.clear;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* A universal template for bad Downlink frame: {DATA,TRAFFIC}.ind */</span><br><span style="color: hsl(120, 100%, 40%);">+ tr_bad_frame := tr_L1CTL_TRAFFIC_IND(g_chan_nr, tr_RslLinkID_DCCH(0));</span><br><span style="color: hsl(120, 100%, 40%);">+ tr_bad_frame.header.msg_type := (L1CTL_DATA_IND, L1CTL_TRAFFIC_IND);</span><br><span style="color: hsl(120, 100%, 40%);">+ tr_bad_frame.dl_info.fire_crc := (1..255); /* != 0 */</span><br><span style="color: hsl(120, 100%, 40%);">+ tr_bad_frame.payload := ?;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ T.start;</span><br><span style="color: hsl(120, 100%, 40%);">+ alt {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* OS#4823: DATA.ind or TRAFFIC.ind with bad CRC most likely means that</span><br><span style="color: hsl(120, 100%, 40%);">+ * the IUT is sending *dummy bursts*, so the L1 fails to decode them. */</span><br><span style="color: hsl(120, 100%, 40%);">+ [] L1CTL.receive(tr_bad_frame) -> value l1_dl {</span><br><span style="color: hsl(120, 100%, 40%);">+ setverdict(fail, "Received {DATA,TRAFFIC}.ind with bad CRC: ", l1_dl);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ [] as_l1_sacch();</span><br><span style="color: hsl(120, 100%, 40%);">+ [] L1CTL.receive { repeat; }</span><br><span style="color: hsl(120, 100%, 40%);">+ [] T.timeout {</span><br><span style="color: hsl(120, 100%, 40%);">+ /* We're done, break the loop */</span><br><span style="color: hsl(120, 100%, 40%);">+ setverdict(pass);</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+ }</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_rsl_chan_deact();</span><br><span style="color: hsl(120, 100%, 40%);">+ f_L1CTL_DM_REL_REQ(L1CTL, g_chan_nr);</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+testcase TC_speech_no_rtp_tchf() runs on test_CT {</span><br><span style="color: hsl(120, 100%, 40%);">+ var ConnHdlr vc_conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ var ConnHdlrPars pars;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_init();</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* TS1, TCH/F, V1 (FR codec) */</span><br><span style="color: hsl(120, 100%, 40%);">+ pars := valueof(t_Pars(ts_RslChanNr_Bm(1), ts_RSL_ChanMode(RSL_CHRT_TCH_F, RSL_CMOD_SP_GSM1)));</span><br><span style="color: hsl(120, 100%, 40%);">+ vc_conn := f_start_handler(refers(f_TC_speech_no_rtp), pars);</span><br><span style="color: hsl(120, 100%, 40%);">+ vc_conn.done;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+testcase TC_speech_no_rtp_tchh() runs on test_CT {</span><br><span style="color: hsl(120, 100%, 40%);">+ var ConnHdlr vc_conn;</span><br><span style="color: hsl(120, 100%, 40%);">+ var ConnHdlrPars pars;</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ f_init();</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ /* TS5, TCH/H, V1 (HR codec) */</span><br><span style="color: hsl(120, 100%, 40%);">+ pars := valueof(t_Pars(ts_RslChanNr_Lm(5, 0), ts_RSL_ChanMode(RSL_CHRT_TCH_H, RSL_CMOD_SP_GSM1)));</span><br><span style="color: hsl(120, 100%, 40%);">+ vc_conn := f_start_handler(refers(f_TC_speech_no_rtp), pars);</span><br><span style="color: hsl(120, 100%, 40%);">+ vc_conn.done;</span><br><span style="color: hsl(120, 100%, 40%);">+}</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span> /* test generation of RLL ERR IND based on Um errors (TS 48.058 3.9) */</span><br><span> /* protocol error as per 44.006 */</span><br><span> /* link layer failure (repetition of I-frame N200 times without ACK */</span><br><span>@@ -7259,6 +7320,9 @@</span><br><span> </span><br><span> execute( TC_ms_pwr_ctrl_constant() );</span><br><span> execute( TC_ms_pwr_ctrl_pf_ewma() );</span><br><span style="color: hsl(120, 100%, 40%);">+</span><br><span style="color: hsl(120, 100%, 40%);">+ execute( TC_speech_no_rtp_tchf() );</span><br><span style="color: hsl(120, 100%, 40%);">+ execute( TC_speech_no_rtp_tchh() );</span><br><span> }</span><br><span> </span><br><span> </span><br><span></span><br></pre><p>To view, visit <a href="https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/20810">change 20810</a>. 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<div style="display:none"> Gerrit-Project: osmo-ttcn3-hacks </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-Change-Id: I620ea84ae92c976a62c1f8334ec14a2a7685aa21 </div>
<div style="display:none"> Gerrit-Change-Number: 20810 </div>
<div style="display:none"> Gerrit-PatchSet: 1 </div>
<div style="display:none"> Gerrit-Owner: fixeria <vyanitskiy@sysmocom.de> </div>
<div style="display:none"> Gerrit-MessageType: newchange </div>