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bts: as_rsl_meas_res(): tolerate bad RxQual in early reports

Bit errors are expected during early stage of channel establishment.
Ignore bad RxQual in the very first reports (4 * 0.480s = 1.92s).

This reduces probability of sporadic failures.

Change-Id: Ie8acb15b66cd92092ec49bc8caeaf0ad4d471f1d
Related: OS#6933
---
M bts/BTS_Tests.ttcn
1 file changed, 6 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-ttcn3-hacks refs/changes/70/42070/1

diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 5ec0f1e..c3b8f35 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -2310,6 +2310,12 @@
 		rxq_s_u := f_tolerance(l1p.meas_ul.sub.rxqual, 0, 7, mp_tolerance_rxqual),
 		supp_meas_info := omit
 	};
+	/* Bit errors are expected during early stage of channel establishment.
+	 * Ignore bad RxQual in the very first reports (4 * 0.480s = 1.92s). */
+	if (g_rsl_meas_res_nr < 4) {
+		ul_meas.rxq_f_u := ?;
+		ul_meas.rxq_s_u := ?;
+	}
 	if (l1p.toa256_enabled) {
 		ul_meas.len := (3+8);
 		ul_meas.supp_meas_info := {

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