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openairinterface5g/openair2/GNB_APP/gnb_app.c
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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*
gnb_app.c
-------------------
AUTHOR : Laurent Winckel, Sebastien ROUX, Lionel GAUTHIER, Navid Nikaein, WEI-TAI CHEN
COMPANY : EURECOM, NTUST
EMAIL : Lionel.Gauthier@eurecom.fr and Navid Nikaein, kroempa@gmail.com
*/
#include <string.h>
#include <stdio.h>
#include "gnb_app.h"
#include "gnb_config.h"
#include "assertions.h"
#include "common/ran_context.h"
#include "common/utils/LOG/log.h"
#include "intertask_interface.h"
#include "s1ap_eNB.h"
#include "sctp_eNB_task.h"
#include "gtpv1u_eNB_task.h"
#include "PHY/INIT/phy_init.h"
extern unsigned char NB_gNB_INST;
extern RAN_CONTEXT_t RC;
#define GNB_REGISTER_RETRY_DELAY 10
/*------------------------------------------------------------------------------*/
static void configure_nr_rrc(uint32_t gnb_id)
{
MessageDef *msg_p = NULL;
// int CC_id;
msg_p = itti_alloc_new_message (TASK_GNB_APP, NRRRC_CONFIGURATION_REQ);
if (RC.nrrrc[gnb_id]) {
RCconfig_NRRRC(msg_p,gnb_id, RC.nrrrc[gnb_id]);
LOG_I(GNB_APP,"Sending configuration message to NR_RRC task\n");
itti_send_msg_to_task (TASK_RRC_GNB, GNB_MODULE_ID_TO_INSTANCE(gnb_id), msg_p);
}
else AssertFatal(0,"NRRRC context for gNB %d not allocated\n",gnb_id);
}
/*------------------------------------------------------------------------------*/
/*
static uint32_t gNB_app_register(uint32_t gnb_id_start, uint32_t gnb_id_end)//, const Enb_properties_array_t *enb_properties)
{
uint32_t gnb_id;
MessageDef *msg_p;
uint32_t register_gnb_pending = 0;
for (gnb_id = gnb_id_start; (gnb_id < gnb_id_end) ; gnb_id++) {
{
s1ap_register_enb_req_t *s1ap_register_gNB; //Type Temporarily reuse
// note: there is an implicit relationship between the data structure and the message name
msg_p = itti_alloc_new_message (TASK_GNB_APP, S1AP_REGISTER_ENB_REQ); //Message Temporarily reuse
RCconfig_NR_S1(msg_p, gnb_id);
if (gnb_id == 0) RCconfig_nr_gtpu();
s1ap_register_gNB = &S1AP_REGISTER_ENB_REQ(msg_p); //Message Temporarily reuse
LOG_I(GNB_APP,"default drx %d\n",s1ap_register_gNB->default_drx);
LOG_I(GNB_APP,"[gNB %d] gNB_app_register for instance %d\n", gnb_id, GNB_MODULE_ID_TO_INSTANCE(gnb_id));
itti_send_msg_to_task (TASK_S1AP, GNB_MODULE_ID_TO_INSTANCE(gnb_id), msg_p);
register_gnb_pending++;
}
}
return register_gnb_pending;
}
*/
/*------------------------------------------------------------------------------*/
void *gNB_app_task(void *args_p)
{
uint32_t gnb_nb = RC.nb_nr_inst;
uint32_t gnb_id_start = 0;
uint32_t gnb_id_end = gnb_id_start + gnb_nb;
uint32_t gnb_id;
MessageDef *msg_p = NULL;
const char *msg_name = NULL;
instance_t instance;
int result;
/* for no gcc warnings */
(void)instance;
itti_mark_task_ready (TASK_GNB_APP);
LOG_I(PHY, "%s() Task ready initialize structures\n", __FUNCTION__);
RCconfig_NR_L1();
RCconfig_nr_macrlc();
LOG_I(PHY, "%s() RC.nb_nr_L1_inst:%d\n", __FUNCTION__, RC.nb_nr_L1_inst);
if (RC.nb_nr_L1_inst>0) AssertFatal(l1_north_init_gNB()==0,"could not initialize L1 north interface\n");
AssertFatal (gnb_nb <= RC.nb_nr_inst,
"Number of gNB is greater than gNB defined in configuration file (%d/%d)!",
gnb_nb, RC.nb_nr_inst);
LOG_I(GNB_APP,"Allocating gNB_RRC_INST for %d instances\n",RC.nb_nr_inst);
RC.nrrrc = (gNB_RRC_INST **)malloc(RC.nb_nr_inst*sizeof(gNB_RRC_INST *));
LOG_I(PHY, "%s() RC.nb_nr_inst:%d RC.nrrrc:%p\n", __FUNCTION__, RC.nb_nr_inst, RC.nrrrc);
for (gnb_id = gnb_id_start; (gnb_id < gnb_id_end) ; gnb_id++) {
RC.nrrrc[gnb_id] = (gNB_RRC_INST*)malloc(sizeof(gNB_RRC_INST));
LOG_I(PHY, "%s() Creating RRC instance RC.nrrrc[%d]:%p (%d of %d)\n", __FUNCTION__, gnb_id, RC.nrrrc[gnb_id], gnb_id+1, gnb_id_end);
memset((void *)RC.nrrrc[gnb_id],0,sizeof(gNB_RRC_INST));
configure_nr_rrc(gnb_id);
}
if (EPC_MODE_ENABLED) {
/* Try to register each gNB */
//registered_gnb = 0;
//register_gnb_pending = gNB_app_register (gnb_id_start, gnb_id_end);//, gnb_properties_p);
} else {
/* Start L2L1 task */
msg_p = itti_alloc_new_message(TASK_GNB_APP, INITIALIZE_MESSAGE);
itti_send_msg_to_task(TASK_L2L1, INSTANCE_DEFAULT, msg_p);
}
do {
// Wait for a message
itti_receive_msg (TASK_GNB_APP, &msg_p);
msg_name = ITTI_MSG_NAME (msg_p);
instance = ITTI_MSG_INSTANCE (msg_p);
switch (ITTI_MSG_ID(msg_p)) {
case TERMINATE_MESSAGE:
LOG_W(GNB_APP, " *** Exiting GNB_APP thread\n");
itti_exit_task ();
break;
case MESSAGE_TEST:
LOG_I(GNB_APP, "Received %s\n", ITTI_MSG_NAME(msg_p));
break;
/*
case S1AP_REGISTER_ENB_CNF:
LOG_I(GNB_APP, "[gNB %d] Received %s: associated MME %d\n", instance, msg_name,
S1AP_REGISTER_ENB_CNF(msg_p).nb_mme);
DevAssert(register_gnb_pending > 0);
register_gnb_pending--;
// Check if at least gNB is registered with one MME
if (S1AP_REGISTER_ENB_CNF(msg_p).nb_mme > 0) {
registered_gnb++;
}
// Check if all register gNB requests have been processed
if (register_gnb_pending == 0) {
if (registered_gnb == gnb_nb) {
// If all gNB are registered, start L2L1 task
MessageDef *msg_init_p;
msg_init_p = itti_alloc_new_message (TASK_GNB_APP, INITIALIZE_MESSAGE);
itti_send_msg_to_task (TASK_L2L1, INSTANCE_DEFAULT, msg_init_p);
} else {
uint32_t not_associated = gnb_nb - registered_gnb;
LOG_W(GNB_APP, " %d gNB %s not associated with a MME, retrying registration in %d seconds ...\n",
not_associated, not_associated > 1 ? "are" : "is", GNB_REGISTER_RETRY_DELAY);
// Restart the gNB registration process in GNB_REGISTER_RETRY_DELAY seconds
if (timer_setup (GNB_REGISTER_RETRY_DELAY, 0, TASK_GNB_APP, INSTANCE_DEFAULT, TIMER_ONE_SHOT,
NULL, &gnb_register_retry_timer_id) < 0) {
LOG_E(GNB_APP, " Can not start gNB register retry timer, use \"sleep\" instead!\n");
sleep(GNB_REGISTER_RETRY_DELAY);
// Restart the registration process
registered_gnb = 0;
register_gnb_pending = gNB_app_register (gnb_id_start, gnb_id_end);//, gnb_properties_p);
}
}
}
break;
*/
case S1AP_DEREGISTERED_ENB_IND:
LOG_W(GNB_APP, "[gNB %d] Received %s: associated MME %d\n", instance, msg_name,
S1AP_DEREGISTERED_ENB_IND(msg_p).nb_mme);
/* TODO handle recovering of registration */
break;
case TIMER_HAS_EXPIRED:
LOG_I(GNB_APP, " Received %s: timer_id %ld\n", msg_name, TIMER_HAS_EXPIRED(msg_p).timer_id);
//if (TIMER_HAS_EXPIRED (msg_p).timer_id == gnb_register_retry_timer_id) {
/* Restart the registration process */
// registered_gnb = 0;
// register_gnb_pending = gNB_app_register(gnb_id_start, gnb_id_end);//, gnb_properties_p);
//}
break;
default:
LOG_E(GNB_APP, "Received unexpected message %s\n", msg_name);
break;
}
result = itti_free (ITTI_MSG_ORIGIN_ID(msg_p), msg_p);
AssertFatal (result == EXIT_SUCCESS, "Failed to free memory (%d)!\n", result);
} while (1);
return NULL;
}
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