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F1AP: on UEContextRelCmd, DU distinguishes whether UE is out of sync

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This commit is contained in:
Robert Schmidt
2019-01-18 16:44:00 +01:00
parent 7df8257526
commit ca2f91072a
1 changed files with 43 additions and 22 deletions
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openair2/F1AP/f1ap_du_ue_context_management.c
+43 -22
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@@ -675,33 +675,22 @@ int DU_handle_UE_CONTEXT_RELEASE_COMMAND(instance_t instance,
"RNTI obtained through DU ID (%x) is different from CU ID (%x)\n",
rnti, ctxt.rnti);
int UE_out_of_sync = 0;
for (int n = 0; n < MAX_MOBILES_PER_ENB; ++n) {
if (RC.mac[instance]->UE_list.active[n] == TRUE
&& rnti == UE_RNTI(instance, n)) {
UE_out_of_sync = RC.mac[instance]->UE_list.UE_sched_ctrl[n].ul_out_of_sync;
break;
}
}
/* We don't need the Cause */
/* Optional RRC Container: if present, send to UE */
F1AP_FIND_PROTOCOLIE_BY_ID(F1AP_UEContextReleaseCommandIEs_t, ie, container,
F1AP_ProtocolIE_ID_id_RRCContainer, false);
if (ie) {
struct rrc_eNB_ue_context_s* ue_context_p;
ue_context_p = rrc_eNB_get_ue_context(RC.rrc[ctxt.module_id], ctxt.rnti);
pthread_mutex_lock(&rrc_release_freelist);
for (uint16_t release_num = 0; release_num < NUMBER_OF_UE_MAX; release_num++) {
if (rrc_release_info.RRC_release_ctrl[release_num].flag == 0) {
if (ue_context_p->ue_context.ue_release_timer_s1 > 0)
rrc_release_info.RRC_release_ctrl[release_num].flag = 1;
else
rrc_release_info.RRC_release_ctrl[release_num].flag = 2;
rrc_release_info.RRC_release_ctrl[release_num].rnti = ctxt.rnti;
// TODO: how to provide the correct MUI?
rrc_release_info.RRC_release_ctrl[release_num].rrc_eNB_mui = 0;
rrc_release_info.num_UEs++;
LOG_D(RRC,"Generate DLSCH Release send: index %d rnti %x mui %d flag %d \n",release_num,
ctxt.rnti, 0, rrc_release_info.RRC_release_ctrl[release_num].flag);
break;
}
}
pthread_mutex_unlock(&rrc_release_freelist);
if (ie && !UE_out_of_sync) {
/* RRC message and UE is reachable, send message */
const sdu_size_t sdu_len = ie->value.choice.RRCContainer.size;
mem_block_t *pdu_p = NULL;
pdu_p = get_free_mem_block(sdu_len, __func__);
@@ -737,7 +726,39 @@ int DU_handle_UE_CONTEXT_RELEASE_COMMAND(instance_t instance,
break;
}
}
struct rrc_eNB_ue_context_s* ue_context_p;
ue_context_p = rrc_eNB_get_ue_context(RC.rrc[ctxt.module_id], ctxt.rnti);
if (ue_context_p && !UE_out_of_sync) {
/* UE exists and is in sync so we start a timer before releasing the
* connection */
pthread_mutex_lock(&rrc_release_freelist);
for (uint16_t release_num = 0; release_num < NUMBER_OF_UE_MAX; release_num++) {
if (rrc_release_info.RRC_release_ctrl[release_num].flag == 0) {
if (ue_context_p->ue_context.ue_release_timer_s1 > 0)
rrc_release_info.RRC_release_ctrl[release_num].flag = 1;
else
rrc_release_info.RRC_release_ctrl[release_num].flag = 2;
rrc_release_info.RRC_release_ctrl[release_num].rnti = ctxt.rnti;
LOG_W(DU_F1AP, "add rrc_release_info RNTI %x\n", ctxt.rnti);
// TODO: how to provide the correct MUI?
rrc_release_info.RRC_release_ctrl[release_num].rrc_eNB_mui = 0;
rrc_release_info.num_UEs++;
LOG_D(RRC,"Generate DLSCH Release send: index %d rnti %x mui %d flag %d \n",release_num,
ctxt.rnti, 0, rrc_release_info.RRC_release_ctrl[release_num].flag);
break;
}
}
pthread_mutex_unlock(&rrc_release_freelist);
ue_context_p->ue_context.ue_release_timer_s1 = 0;
} else if (ue_context_p && UE_out_of_sync) {
/* UE exists and is out of sync, drop the connection */
mac_eNB_rrc_ul_failure(instance, 0, 0, 0, rnti);
} else {
LOG_E(DU_F1AP, "no ue_context for RNTI %x, acknowledging release\n", rnti);
}
/* TODO send this once the connection has really been released */
f1ap_ue_context_release_cplt_t cplt;
cplt.rnti = ctxt.rnti;
DU_send_UE_CONTEXT_RELEASE_COMPLETE(instance, &cplt);