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Set UE DU assoc_id to 0 on DU disconnect

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An assoc_id of 0 is used to mark UEs whose DU is "offline" (not
connected). In this patch, if a DU disconnects, we go through all UEs
and set their assoc_id to 0 if they belong to a UE that just went
offline.
This commit is contained in:
Robert Schmidt
2023-11-08 10:18:52 +01:00
parent e5684d217c
commit a377e5231c
1 changed files with 25 additions and 1 deletions
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openair2/RRC/NR/rrc_gNB_du.c
+25 -1
View File
@@ -22,7 +22,9 @@
#include "rrc_gNB_du.h"
#include "common/ran_context.h"
#include "nr_rrc_defs.h"
#include "rrc_gNB_UE_context.h"
#include "openair2/F1AP/f1ap_common.h"
#include "openair2/F1AP/f1ap_ids.h"
#include "executables/softmodem-common.h"
@@ -163,6 +165,25 @@ void rrc_gNB_process_f1_setup_req(f1ap_setup_req_t *req, sctp_assoc_t assoc_id)
*/
}
static int invalidate_du_connections(gNB_RRC_INST *rrc, sctp_assoc_t assoc_id)
{
int count = 0;
rrc_gNB_ue_context_t *ue_context_p = NULL;
RB_FOREACH(ue_context_p, rrc_nr_ue_tree_s, &rrc->rrc_ue_head) {
uint32_t ue_id = ue_context_p->ue_context.rrc_ue_id;
f1_ue_data_t ue_data = cu_get_f1_ue_data(ue_id);
if (ue_data.du_assoc_id == assoc_id) {
/* this UE belongs to the DU that disconnected, set du_assoc_id to 0,
* meaning DU is offline */
cu_remove_f1_ue_data(ue_id);
f1_ue_data_t new = {.secondary_ue = ue_data.secondary_ue, .du_assoc_id = 0 };
cu_add_f1_ue_data(ue_id, &new);
count++;
}
}
return count;
}
void rrc_CU_process_f1_lost_connection(gNB_RRC_INST *rrc, f1ap_lost_connection_t *lc, sctp_assoc_t assoc_id)
{
AssertFatal(assoc_id != 0, "illegal assoc_id == 0: should be -1 (monolithic) or >0 (split)\n");
@@ -182,7 +203,10 @@ void rrc_CU_process_f1_lost_connection(gNB_RRC_INST *rrc, f1ap_lost_connection_t
free(rrc->du);
rrc->du = NULL;
/* TODO invalidate UE assoc IDs */
int num = invalidate_du_connections(rrc, assoc_id);
if (num > 0) {
LOG_I(NR_RRC, "%d UEs lost through DU disconnect\n", num);
}
}
nr_rrc_du_container_t *get_du_for_ue(gNB_RRC_INST *rrc, uint32_t ue_id)