[PATCH] osmo-bsc[master]: HO: add algorithm cfg; skip HO 1 if HO 2 is configured

[Neels Hofmeyr]

Review at  https://gerrit.osmocom.org/5913

HO: add algorithm cfg; skip HO 1 if HO 2 is configured

Change-Id: If07c0a7b84937ab92948e9b71b2496a765946020
---
M include/osmocom/bsc/handover_cfg.h
M src/libbsc/handover_decision.c
2 files changed, 13 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-bsc refs/changes/13/5913/1

diff --git a/include/osmocom/bsc/handover_cfg.h b/include/osmocom/bsc/handover_cfg.h
index 264cb1b..e281c3f 100644
--- a/include/osmocom/bsc/handover_cfg.h
+++ b/include/osmocom/bsc/handover_cfg.h
@@ -60,6 +60,15 @@
 		"Enable in-call handover\n" \
 		"Enable/disable handover: ") \
 	\
+	HO_CFG_ONE_MEMBER(int, algorithm, 1, \
+		"handover algorithm", "1|2", atoi, "%d", as_is, \
+		HO_CFG_STR_HANDOVER \
+		"Choose algorithm for handover decision\n" \
+		"Algorithm 1: trigger handover based on comparing current cell and neighbor RxLev and RxQual," \
+		" only.\n" \
+		"Algorithm 2: trigger handover on RxLev/RxQual, and also to balance the load across several" \
+		" cells. Consider available codecs. Prevent repeated handover by penalty timers.\n") \
+	\
 	HO_CFG_ONE_MEMBER(unsigned int, rxlev_avg_win, 10, \
 		"handover window rxlev averaging", "<1-10>", atoi, "%u", as_is, \
 		HO_CFG_STR_WIN_RXLEV \
diff --git a/src/libbsc/handover_decision.c b/src/libbsc/handover_decision.c
index 158fc1c..1e2e0d9 100644
--- a/src/libbsc/handover_decision.c
+++ b/src/libbsc/handover_decision.c
@@ -265,6 +265,10 @@
 	int av_rxlev;
 	unsigned int pwr_interval;
 
+	/* If this cell does not use handover algorithm 1, then we're not responsible. */
+	if (ho_get_algorithm(bts->ho) != 1)
+		return 0;
+
 	/* we currently only do handover for TCH channels */
 	switch (mr->lchan->type) {
 	case GSM_LCHAN_TCH_F:

-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: If07c0a7b84937ab92948e9b71b2496a765946020
Gerrit-PatchSet: 1
Gerrit-Project: osmo-bsc
Gerrit-Branch: master
Gerrit-Owner: Neels Hofmeyr <nhofmeyr at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder