Change in ...osmo-bts[master]: Move Access Burst link quality handling to L1SAP

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fixeria gerrit-no-reply at lists.osmocom.org
Sun Jul 21 15:16:22 UTC 2019 

fixeria has submitted this change and it was merged. ( https://gerrit.osmocom.org/c/osmo-bts/+/14687 )

Change subject: Move Access Burst link quality handling to L1SAP
......................................................................

Move Access Burst link quality handling to L1SAP

Change-Id: I893ec9c6c2ebad71ea68b2dc5f9f5094dfc43b78
Depends: (libosmocore) Ie2a66ebd040b61d6daf49e04bf8a84d3d64764ee
---
M src/common/l1sap.c
M src/osmo-bts-litecell15/l1_if.c
M src/osmo-bts-oc2g/l1_if.c
M src/osmo-bts-sysmo/l1_if.c
M src/osmo-bts-trx/scheduler_trx.c
M tests/handover/handover_test.c
6 files changed, 19 insertions(+), 21 deletions(-)

Approvals:
  Jenkins Builder: Verified
  fixeria: Looks good to me, approved
  pespin: Looks good to me, but someone else must approve
  laforge: Looks good to me, but someone else must approve



diff --git a/src/common/l1sap.c b/src/common/l1sap.c
index 79af8e2..f07e79c 100644
--- a/src/common/l1sap.c
+++ b/src/common/l1sap.c
@@ -1272,6 +1272,14 @@
 		return false;
 	}
 
+	/* Link quality defined by C/I (Carrier-to-Interference ratio) */
+	if (rach_ind->lqual_cb < bts->min_qual_rach) {
+		LOGPFN(DL1C, LOGL_INFO, rach_ind->fn, "Ignoring RACH request: "
+			"link quality (%d) below the minimum (%d)\n",
+			rach_ind->lqual_cb, bts->min_qual_rach);
+		return false;
+	}
+
 	return true;
 }
 
diff --git a/src/osmo-bts-litecell15/l1_if.c b/src/osmo-bts-litecell15/l1_if.c
index 77b72bd..2ac0b7a 100644
--- a/src/osmo-bts-litecell15/l1_if.c
+++ b/src/osmo-bts-litecell15/l1_if.c
@@ -997,18 +997,11 @@
 			    struct msgb *l1p_msg)
 {
 	struct gsm_bts_trx *trx = lc15l1_hdl_trx(fl1);
-	struct gsm_bts *bts = trx->bts;
 	struct gsm_lchan *lchan;
 	struct osmo_phsap_prim *l1sap;
 	int rc;
 	struct ph_rach_ind_param rach_ind_param;
 
-	/* FIXME: this should be deprecated/obsoleted as it bypasses rach.busy counting */
-	if (ra_ind->measParam.fLinkQuality * 10 < bts->min_qual_rach) {
-		msgb_free(l1p_msg);
-		return 0;
-	}
-
 	dump_meas_res(LOGL_DEBUG, &ra_ind->measParam);
 
 	if ((ra_ind->msgUnitParam.u8Size != 1) &&
@@ -1029,6 +1022,7 @@
 		.rssi = (int8_t) ra_ind->measParam.fRssi,
 		.ber10k = (unsigned int) (ra_ind->measParam.fBer * 10000.0),
 		.acc_delay_256bits = ra_ind->measParam.i16BurstTiming * 64,
+		.lqual_cb = (int16_t) ra_ind->measParam.fLinkQuality * 10, /* centiBels */
 	};
 
 	lchan = l1if_hLayer_to_lchan(trx, (uint32_t)ra_ind->hLayer2);
diff --git a/src/osmo-bts-oc2g/l1_if.c b/src/osmo-bts-oc2g/l1_if.c
index 9affc89..d987bb5 100644
--- a/src/osmo-bts-oc2g/l1_if.c
+++ b/src/osmo-bts-oc2g/l1_if.c
@@ -1053,18 +1053,11 @@
 			    struct msgb *l1p_msg)
 {
 	struct gsm_bts_trx *trx = oc2gl1_hdl_trx(fl1);
-	struct gsm_bts *bts = trx->bts;
 	struct gsm_lchan *lchan;
 	struct osmo_phsap_prim *l1sap;
 	int rc;
 	struct ph_rach_ind_param rach_ind_param;
 
-	/* FIXME: this should be deprecated/obsoleted as it bypasses rach.busy counting */
-	if (ra_ind->measParam.fLinkQuality * 10 < bts->min_qual_rach) {
-		msgb_free(l1p_msg);
-		return 0;
-	}
-
 	dump_meas_res(LOGL_DEBUG, &ra_ind->measParam);
 
 	if ((ra_ind->msgUnitParam.u8Size != 1) &&
@@ -1085,6 +1078,7 @@
 		.rssi = (int8_t) ra_ind->measParam.fRssi,
 		.ber10k = (unsigned int) (ra_ind->measParam.fBer * 10000.0),
 		.acc_delay_256bits = ra_ind->measParam.i16BurstTiming * 64,
+		.lqual_cb = (int16_t) ra_ind->measParam.fLinkQuality * 10, /* centiBels */
 	};
 
 	lchan = l1if_hLayer_to_lchan(trx, (uint32_t)ra_ind->hLayer2);
diff --git a/src/osmo-bts-sysmo/l1_if.c b/src/osmo-bts-sysmo/l1_if.c
index 58fc24e..df39e2f 100644
--- a/src/osmo-bts-sysmo/l1_if.c
+++ b/src/osmo-bts-sysmo/l1_if.c
@@ -991,18 +991,11 @@
 			    struct msgb *l1p_msg)
 {
 	struct gsm_bts_trx *trx = femtol1_hdl_trx(fl1);
-	struct gsm_bts *bts = trx->bts;
 	struct gsm_lchan *lchan;
 	struct osmo_phsap_prim *l1sap;
 	int rc;
 	struct ph_rach_ind_param rach_ind_param;
 
-	/* FIXME: this should be deprecated/obsoleted as it bypasses rach.busy counting */
-	if (ra_ind->measParam.fLinkQuality * 10 < bts->min_qual_rach) {
-		msgb_free(l1p_msg);
-		return 0;
-	}
-
 	dump_meas_res(LOGL_DEBUG, &ra_ind->measParam);
 
 	if ((ra_ind->msgUnitParam.u8Size != 1) &&
@@ -1024,6 +1017,7 @@
 		.rssi = (int8_t) ra_ind->measParam.fRssi,
 		.ber10k = (unsigned int) (ra_ind->measParam.fBer * 10000.0),
 		.acc_delay_256bits = ra_ind->measParam.i16BurstTiming * 64,
+		.lqual_cb = (int16_t) ra_ind->measParam.fLinkQuality * 10, /* centiBels */
 	};
 
 	lchan = l1if_hLayer_to_lchan(trx, ra_ind->hLayer2);
diff --git a/src/osmo-bts-trx/scheduler_trx.c b/src/osmo-bts-trx/scheduler_trx.c
index 79e42e1..ec1d832 100644
--- a/src/osmo-bts-trx/scheduler_trx.c
+++ b/src/osmo-bts-trx/scheduler_trx.c
@@ -823,6 +823,12 @@
 	l1sap.u.rach_ind.rssi = bi->rssi;
 	l1sap.u.rach_ind.fn = bi->fn;
 
+	/* Link quality is defined by C/I (Carrier-to-Interference ratio),
+	 * which has optional presence. If it's absent, report the
+	 * minimum acceptable value to pass L1SAP checks. */
+	/* TODO: check for TRX_BI_F_CI_CB, and use the value from UL.ind */
+	l1sap.u.rach_ind.lqual_cb = l1t->trx->bts->min_qual_rach;
+
 	/* Decode RACH depending on its synch. sequence */
 	switch (synch_seq) {
 	case RACH_SYNCH_SEQ_TS1:
diff --git a/tests/handover/handover_test.c b/tests/handover/handover_test.c
index a805554..c9799af 100644
--- a/tests/handover/handover_test.c
+++ b/tests/handover/handover_test.c
@@ -118,6 +118,8 @@
 	/* send access burst with wrong ref */
 	memset(&nl1sap, 0, sizeof(nl1sap));
 	osmo_prim_init(&nl1sap.oph, SAP_GSM_PH, PRIM_PH_RACH, PRIM_OP_INDICATION, NULL);
+	/* Report the minimum acceptable value to pass L1SAP checks */
+	nl1sap.u.rach_ind.lqual_cb = bts->min_qual_rach;
 	nl1sap.u.rach_ind.chan_nr = 0x0a;
 	nl1sap.u.rach_ind.ra = 42;
 	l1sap_up(trx, &nl1sap);

-- 
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Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Change-Id: I893ec9c6c2ebad71ea68b2dc5f9f5094dfc43b78
Gerrit-Change-Number: 14687
Gerrit-PatchSet: 8
Gerrit-Owner: fixeria <axilirator at gmail.com>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <axilirator at gmail.com>
Gerrit-Reviewer: laforge <laforge at gnumonks.org>
Gerrit-Reviewer: pespin <pespin at sysmocom.de>
Gerrit-MessageType: merged
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