neels has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bsc/+/19558 )
Change subject: hodec2 congestion: consider only congested pchan types ...................................................................... hodec2 congestion: consider only congested pchan types If no TCH/H need to be moved, then don't collect TCH/H candidates. Same for TCH/F. Examining a specific congestion scenario, I realized that ho decision 2 collects candidates of pchan types that are not actually considered congested: - handover decision 2 wants to move 2 TCH/F only; TCH/H is fine. - still it collects active TCH/H lchans as candidates. (BTS 0) Congestion check: (free/want-free) TCH/F=0/2 TCH/H=12/0 (BTS 0) Attempting to resolve congestion... (BTS 0) congested: 2 TCH/F and 0 TCH/H should be moved [...] (BTS 0) Considering 8 candidates to solve congestion: (lchan 0.020 TCH_F SPEECH_V1)->(BTS 0) (subscr unknown) #0: req=0x0 avg-rxlev=42 (lchan 0.030 TCH_F SPEECH_V1)->(BTS 0) (subscr unknown) #1: req=0x0 avg-rxlev=42 (lchan 0.040 TCH_F SPEECH_V1)->(BTS 0) (subscr unknown) #2: req=0x0 avg-rxlev=42 (lchan 0.050 TCH_F SPEECH_V1)->(BTS 0) (subscr unknown) #3: req=0x0 avg-rxlev=42 (lchan 0.160 TCH_H SPEECH_V1)->(BTS 0) (subscr IMSI:9017000000xxxxx) #4: req=0x0 avg-rxlev=42 (lchan 0.161 TCH_H SPEECH_V1)->(BTS 0) (subscr IMSI:9017000000xxxxx) #5: req=0x0 avg-rxlev=42 (lchan 0.170 TCH_H SPEECH_V1)->(BTS 0) (subscr IMSI:9017000000xxxxx) #6: req=0x0 avg-rxlev=42 (lchan 0.171 TCH_H SPEECH_V1)->(BTS 0) (subscr IMSI:9017000000xxxxx) #7: req=0x0 avg-rxlev=42 Change-Id: I5077a62c6d77838513eecf3f0e4810c3d3d3a247 --- M src/osmo-bsc/handover_decision_2.c 1 file changed, 8 insertions(+), 0 deletions(-) git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/58/19558/1 diff --git a/src/osmo-bsc/handover_decision_2.c b/src/osmo-bsc/handover_decision_2.c index 4c32c38..26a8840 100644 --- a/src/osmo-bsc/handover_decision_2.c +++ b/src/osmo-bsc/handover_decision_2.c @@ -1445,6 +1445,10 @@ /* (Do not consider dynamic TS that are in PDCH mode) */ switch (ts->pchan_is) { case GSM_PCHAN_TCH_F: + /* No need to collect TCH/F candidates if no TCH/F needs to be moved. */ + if (tchf_congestion == 0) + continue; + lc = &ts->lchan[0]; /* omit if channel not active */ if (lc->type != GSM_LCHAN_TCH_F @@ -1459,6 +1463,10 @@ collect_candidates_for_lchan(lc, clist, &candidates, NULL, true); break; case GSM_PCHAN_TCH_H: + /* No need to collect TCH/H candidates if no TCH/H needs to be moved. */ + if (tchh_congestion == 0) + continue; + for (j = 0; j < 2; j++) { lc = &ts->lchan[j]; /* omit if channel not active */ -- To view, visit https://gerrit.osmocom.org/c/osmo-bsc/+/19558 To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings Gerrit-Project: osmo-bsc Gerrit-Branch: master Gerrit-Change-Id: I5077a62c6d77838513eecf3f0e4810c3d3d3a247 Gerrit-Change-Number: 19558 Gerrit-PatchSet: 1 Gerrit-Owner: neels <nhofm...@sysmocom.de> Gerrit-MessageType: newchange