Cedric Roux
4236ff2b3e
This commit introduces several enhancements in X2AP and RRC to deal
with ENDC. The main goal is to deal with UE's on/off and with various
errors.
The following work is included:
- DC prep and DC overall X2 timers
- X2 messages for UE release and DC timers' timeout
Open problems:
- what to do when the UE sends an scg Failure? This commit removes
the UE. And this removal may not be correctly done
- UE removal in the gNB's PHY layer (a next commit is coming,
but it is hackish and will need a rework)
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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#ifndef X2AP_IDS_H_
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#define X2AP_IDS_H_
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#include <stdint.h>
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/* maximum number of simultaneous handovers, do not set too high */
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#define X2AP_MAX_IDS 16
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/*
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* state:
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* - when starting handover in source, UE is in state X2ID_STATE_SOURCE_PREPARE
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* - after receiving HO_ack in source, UE is in state X2ID_STATE_SOURCE_OVERALL
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* - in target, UE is in state X2ID_STATE_TARGET
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* The state is used to check timers.
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*/
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typedef enum {
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X2ID_STATE_SOURCE_PREPARE,
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X2ID_STATE_SOURCE_OVERALL,
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X2ID_STATE_TARGET,
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X2ID_STATE_NSA_ENB_PREPARE,
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X2ID_STATE_NSA_GNB_OVERALL,
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} x2id_state_t;
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typedef struct {
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int rnti; /* -1 when free */
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int id_source;
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int id_target;
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/* the target eNB. Real type is x2ap_eNB_data_t * */
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void *target;
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/* state: needed to check timers */
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x2id_state_t state;
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/* timers */
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uint64_t t_reloc_prep_start;
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uint64_t tx2_reloc_overall_start;
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uint64_t t_dc_prep_start;
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uint64_t t_dc_overall_start;
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} x2ap_id;
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typedef struct {
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x2ap_id ids[X2AP_MAX_IDS];
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} x2ap_id_manager;
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void x2ap_id_manager_init(x2ap_id_manager *m);
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int x2ap_allocate_new_id(x2ap_id_manager *m);
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void x2ap_release_id(x2ap_id_manager *m, int id);
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int x2ap_find_id(x2ap_id_manager *, int id_source, int id_target);
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int x2ap_find_id_from_id_source(x2ap_id_manager *, int id_source);
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int x2ap_find_id_from_id_target(x2ap_id_manager *, int id_source);
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int x2ap_find_id_from_rnti(x2ap_id_manager *, int rnti);
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void x2ap_set_ids(x2ap_id_manager *m, int ue_id, int rnti, int id_source, int id_target);
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void x2ap_id_set_state(x2ap_id_manager *m, int ue_id, x2id_state_t state);
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/* real type of target is x2ap_eNB_data_t * */
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void x2ap_id_set_target(x2ap_id_manager *m, int ue_id, void *target);
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void x2ap_set_reloc_prep_timer(x2ap_id_manager *m, int ue_id, uint64_t time);
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void x2ap_set_reloc_overall_timer(x2ap_id_manager *m, int ue_id, uint64_t time);
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void x2ap_set_dc_prep_timer(x2ap_id_manager *m, int ue_id, uint64_t time);
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void x2ap_set_dc_overall_timer(x2ap_id_manager *m, int ue_id, uint64_t time);
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int x2ap_id_get_id_source(x2ap_id_manager *m, int ue_id);
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int x2ap_id_get_id_target(x2ap_id_manager *m, int ue_id);
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int x2ap_id_get_rnti(x2ap_id_manager *m, int ue_id);
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void *x2ap_id_get_target(x2ap_id_manager *m, int ue_id);
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#endif /* X2AP_IDS_H_ */
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