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limit the number of preambles per SSB at UE in case PRACH is configured with groupB

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francescomani
2025-05-26 15:32:01 +02:00
parent b2c9a1d2b5
commit f84ec1340c
1 changed files with 2 additions and 5 deletions
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openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
+2 -5
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@@ -336,17 +336,14 @@ static void config_preamble_index(NR_UE_MAC_INST_t *mac)
nb_of_preambles = preamb_ga; nb_of_preambles = preamb_ga;
} }
} }
int rand_preamb = (rand_r(&seed) % ra->ssb_ro_config.preambles_per_ssb); int pream_per_ssb = min(ra->ssb_ro_config.preambles_per_ssb, nb_of_preambles);
int rand_preamb = rand_r(&seed) % pream_per_ssb;
if (ra->ssb_ro_config.ssb_per_ro < 1) if (ra->ssb_ro_config.ssb_per_ro < 1)
ra->ra_PreambleIndex = groupOffset + rand_preamb; ra->ra_PreambleIndex = groupOffset + rand_preamb;
else { else {
int ssb_pr_idx = mac->ssb_list.nb_ssb_per_index[mac->mib_ssb] % (int)ra->ssb_ro_config.ssb_per_ro; int ssb_pr_idx = mac->ssb_list.nb_ssb_per_index[mac->mib_ssb] % (int)ra->ssb_ro_config.ssb_per_ro;
ra->ra_PreambleIndex = groupOffset + (ssb_pr_idx * ra->ssb_ro_config.preambles_per_ssb) + rand_preamb; ra->ra_PreambleIndex = groupOffset + (ssb_pr_idx * ra->ssb_ro_config.preambles_per_ssb) + rand_preamb;
} }
AssertFatal(ra->ra_PreambleIndex < nb_of_preambles,
"Error! Selected preamble %d which exceeds number of prambles available %d\n",
ra->ra_PreambleIndex,
nb_of_preambles);
} }
static void configure_ra_preamble(NR_UE_MAC_INST_t *mac) static void configure_ra_preamble(NR_UE_MAC_INST_t *mac)