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authorNeels Hofmeyr <neels@hofmeyr.de>2018-10-10 16:22:06 +0200
committerNeels Hofmeyr <neels@hofmeyr.de>2018-10-16 13:01:01 +0200
commit31461efad3f682f66f71af12a6dae928cc30c03f (patch)
tree901f51c3676c1c0b2356fdd7ea074bdde3cd74e7
parentb0479496e371e2f26f611e6e81015bdcb59515bf (diff)
handover_decision_2.c: refactor trigger_*()
a) Prepare for triggering handover for any candidate, remote or local. b) drop redundant arguments. Change-Id: I5ba8b556703010c8e232b516285a837c999f87ef
-rw-r--r--src/osmo-bsc/handover_decision_2.c35
1 files changed, 18 insertions, 17 deletions
diff --git a/src/osmo-bsc/handover_decision_2.c b/src/osmo-bsc/handover_decision_2.c
index 64fc2ddc0..457d57ae6 100644
--- a/src/osmo-bsc/handover_decision_2.c
+++ b/src/osmo-bsc/handover_decision_2.c
@@ -620,8 +620,10 @@ static uint8_t check_requirements(struct gsm_lchan *lchan, struct gsm_bts *bts,
}
/* Trigger handover or assignment depending on the target BTS */
-static int trigger_handover_or_assignment(struct gsm_lchan *lchan, struct gsm_bts *new_bts, uint8_t requirements)
+static int trigger_local_ho_or_as(struct ho_candidate *c, uint8_t requirements)
{
+ struct gsm_lchan *lchan = c->lchan;
+ struct gsm_bts *new_bts = c->bts;
struct handover_out_req req;
struct gsm_bts *current_bts = lchan->ts->trx->bts;
int afs_bias = 0;
@@ -699,6 +701,14 @@ static int trigger_handover_or_assignment(struct gsm_lchan *lchan, struct gsm_bt
return 0;
}
+static int trigger_ho(struct ho_candidate *c, uint8_t requirements)
+{
+ if (c->bts)
+ return trigger_local_ho_or_as(c, requirements);
+ else
+ return 0; /* TODO: remote candidates */
+}
+
/* verbosely log about a handover candidate */
static inline void debug_candidate(struct ho_candidate *candidate,
int8_t rxlev, int tchf_count, int tchh_count)
@@ -1003,8 +1013,7 @@ static int find_alternative_lchan(struct gsm_lchan *lchan, bool include_weaker_r
LOGPHOCAND(best_cand, LOGL_INFO, "Best candidate, RX level %d%s\n",
rxlev2dbm(best_cand->avg),
best_applied_afs_bias ? " (applied AHS -> AFS rxlev bias)" : "");
- return trigger_handover_or_assignment(lchan, best_cand->bts,
- best_cand->requirements & REQUIREMENT_B_MASK);
+ return trigger_ho(best_cand, best_cand->requirements & REQUIREMENT_B_MASK);
}
/* select best candidate that fulfills requirement C: less or equal congestion after HO */
@@ -1032,8 +1041,7 @@ static int find_alternative_lchan(struct gsm_lchan *lchan, bool include_weaker_r
LOGPHOCAND(best_cand, LOGL_INFO, "Best candidate, RX level %d%s\n",
rxlev2dbm(best_cand->avg),
best_applied_afs_bias? " (applied AHS -> AFS rxlev bias)" : "");
- return trigger_handover_or_assignment(lchan, best_cand->bts,
- best_cand->requirements & REQUIREMENT_C_MASK);
+ return trigger_ho(best_cand, best_cand->requirements & REQUIREMENT_C_MASK);
}
/* we are done in case the MS RXLEV/RXQUAL/TA aren't critical and we're avoiding congestion. */
@@ -1069,8 +1077,7 @@ static int find_alternative_lchan(struct gsm_lchan *lchan, bool include_weaker_r
LOGPHOCAND(best_cand, LOGL_INFO, "Best candidate: RX level %d%s\n",
rxlev2dbm(best_cand->avg),
best_applied_afs_bias ? " (applied AHS -> AFS rxlev bias)" : "");
- return trigger_handover_or_assignment(lchan, best_cand->bts,
- best_cand->requirements & REQUIREMENT_A_MASK);
+ return trigger_ho(best_cand, best_cand->requirements & REQUIREMENT_A_MASK);
}
/* Damn, all is congested, has too low RXLEV or cannot service the voice call due to codec
@@ -1416,8 +1423,7 @@ next_b1:
LOGPHOCAND(best_cand, LOGL_DEBUG, "Best candidate: RX level %d%s\n",
rxlev2dbm(best_cand->avg),
is_improved ? " (applied AHS->AFS bias)" : "");
- trigger_handover_or_assignment(best_cand->lchan, best_cand->bts,
- best_cand->requirements & REQUIREMENT_B_MASK);
+ trigger_ho(best_cand, best_cand->requirements & REQUIREMENT_B_MASK);
#if 0
/* if there is still congestion, mark lchan as deleted
* and redo this process */
@@ -1485,9 +1491,7 @@ next_b2:
LOGPHOCAND(worst_cand, LOGL_INFO, "Worst candidate: RX level %d from TCH/H -> TCH/F%s\n",
rxlev2dbm(worst_cand->avg),
is_improved ? " (applied AHS -> AFS rxlev bias)" : "");
- trigger_handover_or_assignment(worst_cand->lchan,
- worst_cand->bts,
- worst_cand->requirements & REQUIREMENT_B_MASK);
+ trigger_ho(worst_cand, worst_cand->requirements & REQUIREMENT_B_MASK);
#if 0
/* if there is still congestion, mark lchan as deleted
* and redo this process */
@@ -1556,8 +1560,7 @@ next_c1:
LOGPHOCAND(best_cand, LOGL_INFO, "Best candidate: RX level %d%s\n",
rxlev2dbm(best_cand->avg),
is_improved ? " (applied AHS -> AFS rxlev bias)" : "");
- trigger_handover_or_assignment(best_cand->lchan, best_cand->bts,
- best_cand->requirements & REQUIREMENT_C_MASK);
+ trigger_ho(best_cand, best_cand->requirements & REQUIREMENT_C_MASK);
#if 0
/* if there is still congestion, mark lchan as deleted
* and redo this process */
@@ -1630,9 +1633,7 @@ next_c2:
LOGPHOCAND(worst_cand, LOGL_INFO, "Worst candidate: RX level %d from TCH/H -> TCH/F%s\n",
rxlev2dbm(worst_cand->avg),
is_improved ? " (applied AHS -> AFS rxlev bias)" : "");
- trigger_handover_or_assignment(worst_cand->lchan,
- worst_cand->bts,
- worst_cand->requirements & REQUIREMENT_C_MASK);
+ trigger_ho(worst_cand, worst_cand->requirements & REQUIREMENT_C_MASK);
#if 0
/* if there is still congestion, mark lchan as deleted
* and redo this process */