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Send F1 UE CONTEXT RELEASE REQ when RRC detects radio failure

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This commit is contained in:
Robert Schmidt
2018-12-07 16:31:36 +01:00
parent 6f19bc4b8f
commit 58850e3c86
1 changed files with 17 additions and 1 deletions
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openair2/RRC/LTE/rrc_eNB.c
+17 -1
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@@ -942,7 +942,23 @@ rrc_eNB_free_UE(const module_id_t enb_mod_idP,const struct rrc_eNB_ue_context_s*
if((ue_context_pP->ue_context.ul_failure_timer >= 20000) &&
(mac_eNB_get_rrc_status(enb_mod_idP,rnti) >= RRC_CONNECTED)) {
LOG_I(RRC, "[eNB %d] S1AP_UE_CONTEXT_RELEASE_REQ RNTI %x\n", enb_mod_idP, rnti);
rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ(enb_mod_idP, ue_context_pP, S1AP_CAUSE_RADIO_NETWORK, 21); // send cause 21: connection with ue lost
if (RC.rrc[enb_mod_idP]->node_type == ngran_eNB
|| RC.rrc[enb_mod_idP]->node_type == ngran_eNB_CU
|| RC.rrc[enb_mod_idP]->node_type == ngran_gNB_CU) {
rrc_eNB_send_S1AP_UE_CONTEXT_RELEASE_REQ(
enb_mod_idP,
ue_context_pP,
S1AP_CAUSE_RADIO_NETWORK,
21); // send cause 21: connection with ue lost
} else { // DU
MessageDef *m = itti_alloc_new_message(TASK_RRC_ENB, F1AP_UE_CONTEXT_RELEASE_REQ);
F1AP_UE_CONTEXT_RELEASE_REQ(m).rnti = ue_context_pP->ue_context.rnti;
F1AP_UE_CONTEXT_RELEASE_REQ(m).cause = F1AP_CAUSE_RADIO_NETWORK;
F1AP_UE_CONTEXT_RELEASE_REQ(m).cause_value = 1; // 1 = F1AP_CauseRadioNetwork_rl_failure
F1AP_UE_CONTEXT_RELEASE_REQ(m).rrc_container = NULL;
F1AP_UE_CONTEXT_RELEASE_REQ(m).rrc_container_length = 0;
itti_send_msg_to_task(TASK_DU_F1, enb_mod_idP, m);
}
/* From 3GPP 36300v10 p129 : 19.2.2.2.2 S1 UE Context Release Request (eNB triggered)
* If the E-UTRAN internal reason is a radio link failure detected in the eNB, the eNB shall wait a sufficient time before
* triggering the S1 UE Context Release Request procedure