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Add a 'common' type SearchSpace in the NR_BWP_DownlinkDedicated IE for DedicatedBWPs to get DCIs decoded in common searchspace of a DedicatedBWP

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After RRCSetup, until RRCReconfigurationComplete, gNB continues to schedule ULSCH using DCIs in a common searchspace.
In theory, the UE should decode DCIs in:

            <downlinkBWP-ToAddModList>
                <BWP-Downlink>
                    <bwp-Common>
                        <pdcch-ConfigCommon>
                            <setup>
                                <commonSearchSpaceList>
                                    ...
                                </commonSearchSpaceList>

However, due to the limited amount of time to investigate this issue, the easy way I found to get DCIs decoded in common searchspace of a DedicatedBWP was by adding a common searchspace in the bwp-Dedicated:

                    <bwp-Dedicated>
                        <pdcch-Config>
                            <setup>
                                <searchSpacesToAddModList>
                                    <SearchSpace>
                                        ...
                                    </SearchSpace>
                                </searchSpacesToAddModList>

This way, let's call it a workaround.
This commit is contained in:
luis_pereira87
2025-07-24 10:47:39 +01:00
parent 8c58abf85a
commit 7a5d1e55f0
1 changed files with 9 additions and 4 deletions
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openair2/LAYER2/NR_MAC_gNB/nr_radio_config.c
+9 -4
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@@ -1631,13 +1631,18 @@ static void config_downlinkBWP(NR_BWP_Downlink_t *bwp,
NR_ControlResourceSet_t *coreset2 = get_coreset_config(bwp->bwp_Id, curr_bwp, ssb_bitmap);
asn1cSeqAdd(&bwp->bwp_Dedicated->pdcch_Config->choice.setup->controlResourceSetToAddModList->list, coreset2);
searchspaceid = 10 + bwp->bwp_Id;
num_cces = get_coreset_num_cces(coreset2->frequencyDomainResources.buf, coreset2->duration);
verify_agg_levels(num_cces, num_agg_level_candidates, coreset->controlResourceSetId, searchspaceid, rrc_num_agg_level_candidates);
NR_SearchSpace_t *ss2 =
rrc_searchspace_config(false, searchspaceid, coreset2->controlResourceSetId, rrc_num_agg_level_candidates);
verify_agg_levels(num_cces, num_agg_level_candidates, coreset2->controlResourceSetId, searchspaceid, rrc_num_agg_level_candidates);
searchspaceid = 10 + bwp->bwp_Id;
NR_SearchSpace_t *ss2 = rrc_searchspace_config(true, searchspaceid, coreset2->controlResourceSetId, rrc_num_agg_level_candidates);
asn1cSeqAdd(&bwp->bwp_Dedicated->pdcch_Config->choice.setup->searchSpacesToAddModList->list, ss2);
searchspaceid = 20 + bwp->bwp_Id;
NR_SearchSpace_t *ss3 =
rrc_searchspace_config(false, searchspaceid, coreset2->controlResourceSetId, rrc_num_agg_level_candidates);
asn1cSeqAdd(&bwp->bwp_Dedicated->pdcch_Config->choice.setup->searchSpacesToAddModList->list, ss3);
bwp->bwp_Dedicated->pdcch_Config->choice.setup->searchSpacesToReleaseList = NULL;
bwp->bwp_Dedicated->pdsch_Config = config_pdsch(ssb_bitmap, bwp->bwp_Id, dl_antenna_ports);