Change in osmo-bts[master]: osmo-bts-trx/scheduler: ensure no DL power attenuation on C0

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fixeria gerrit-no-reply at lists.osmocom.org
Tue Dec 1 17:41:37 UTC 2020


fixeria has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/21449 )


Change subject: osmo-bts-trx/scheduler: ensure no DL power attenuation on C0
......................................................................

osmo-bts-trx/scheduler: ensure no DL power attenuation on C0

When [baseband] frequency hopping is in use, Downlink bursts from
additional transceivers may end up being transmitted on TRX0/C0.
In this case, we must not apply per-lchan attenuation, because
the BTS shall maintain constant power level on that TRX.

Change-Id: Id171df70447283b00da965e1f81dfac20e35495c
Related: SYS#4918
---
M src/osmo-bts-trx/scheduler_trx.c
1 file changed, 5 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/49/21449/1

diff --git a/src/osmo-bts-trx/scheduler_trx.c b/src/osmo-bts-trx/scheduler_trx.c
index c000324..1552a86 100644
--- a/src/osmo-bts-trx/scheduler_trx.c
+++ b/src/osmo-bts-trx/scheduler_trx.c
@@ -146,9 +146,12 @@
 				l1h = pinst->u.osmotrx.hdl;
 			}
 
-			/* update dummy burst mask for C0 */
-			if (pinst->trx == bts->c0)
+			if (pinst->trx == bts->c0) {
+				/* update dummy burst mask for C0 */
 				c0_mask |= (1 << tn);
+				/* ensure no attenuation on C0 */
+				br.att = 0;
+			}
 
 			trx_if_send_burst(l1h, &br);
 		}

-- 
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Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Change-Id: Id171df70447283b00da965e1f81dfac20e35495c
Gerrit-Change-Number: 21449
Gerrit-PatchSet: 1
Gerrit-Owner: fixeria <vyanitskiy at sysmocom.de>
Gerrit-MessageType: newchange
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