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switch to initial BWP if current BWP has no PRACH in gNB

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This commit is contained in:
francescomani
2025-09-18 11:57:54 +02:00
parent 206c7667e6
commit 72bfd1b5c3
1 changed files with 15 additions and 9 deletions
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openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c
+15 -9
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@@ -2718,8 +2718,7 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
AssertFatal(dl_bwp_switch == ul_bwp_switch, "Different UL and DL BWP not supported\n");
DL_BWP->bwp_id = dl_bwp_switch;
UL_BWP->bwp_id = ul_bwp_switch;
}
else {
} else {
// (re)configuring BWP
// TODO BWP switching not via RRC reconfiguration
// via RRC if firstActiveXlinkBWP_Id is NULL, MAC stays on the same BWP as before
@@ -2768,8 +2767,7 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
UL_BWP->pusch_Config = ubwpd->pusch_Config->choice.setup;
UL_BWP->pucch_Config = ubwpd->pucch_Config->choice.setup;
UL_BWP->srs_Config = ubwpd->srs_Config->choice.setup;
}
else {
} else {
DL_BWP->bwp_id = 0;
UL_BWP->bwp_id = 0;
DL_BWP->pdsch_Config = NULL;
@@ -2778,11 +2776,6 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
UL_BWP->configuredGrantConfig = NULL;
}
if (old_dl_bwp_id != DL_BWP->bwp_id)
LOG_I(NR_MAC, "Switching to DL-BWP %li\n", DL_BWP->bwp_id);
if (old_ul_bwp_id != UL_BWP->bwp_id)
LOG_I(NR_MAC, "Switching to UL-BWP %li\n", UL_BWP->bwp_id);
// TDA lists
if (DL_BWP->bwp_id>0)
DL_BWP->tdaList_Common = dl_bwp->bwp_Common->pdsch_ConfigCommon->choice.setup->pdsch_TimeDomainAllocationList;
@@ -2832,6 +2825,19 @@ void configure_UE_BWP(gNB_MAC_INST *nr_mac,
UL_BWP->rach_ConfigCommon = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup;
}
// if PRACH occasions are not configured for the active UL BWP
// switch the active UL BWP to BWP indicated by initialUplinkBWP
// as described in 5.15 of 38.321
if (is_RA && !UL_BWP->rach_ConfigCommon) {
LOG_I(NR_MAC, "Cannot perform RA in current BWP, switching to initial BWP\n");
configure_UE_BWP(nr_mac, scc, UE, is_RA, target_ss, 0, 0);
return;
}
if (old_dl_bwp_id != DL_BWP->bwp_id)
LOG_I(NR_MAC, "Switching to DL-BWP %li\n", DL_BWP->bwp_id);
if (old_ul_bwp_id != UL_BWP->bwp_id)
LOG_I(NR_MAC, "Switching to UL-BWP %li\n", UL_BWP->bwp_id);
NR_UE_sched_ctrl_t *sched_ctrl = &UE->UE_sched_ctrl;
// Reset required fields in sched_ctrl (e.g. ul_ri and tpmi)
reset_sched_ctrl(sched_ctrl);