/*
* 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.
*-------------------------------------------------------------------------------
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*/
/*! \file phy_procedures_lte_eNB.c
* \brief Implementation of eNB procedures from 36.213 LTE specifications
* \author R. Knopp, F. Kaltenberger, N. Nikaein, X. Foukas
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr,florian.kaltenberger@eurecom.fr,navid.nikaein@eurecom.fr, x.foukas@sms.ed.ac.uk
* \note
* \warning
*/
#include "PHY/defs.h"
#include "PHY/extern.h"
#include "SCHED/defs.h"
#include "SCHED/extern.h"
#include "nfapi_interface.h"
#include "fapi_l1.h"
#include "UTIL/LOG/log.h"
#include "UTIL/LOG/vcd_signal_dumper.h"
#include "T.h"
#include "assertions.h"
#include "msc.h"
#include <time.h>
#if defined(ENABLE_ITTI)
# include "intertask_interface.h"
#endif
extern uint32_t nfapi_mode;
void prach_procedures(PHY_VARS_eNB *eNB,
#ifdef Rel14
int br_flag
#endif
) {
uint16_t max_preamble[4],max_preamble_energy[4],max_preamble_delay[4];
uint16_t i;
int frame,subframe;
#ifdef Rel14
if (br_flag==1) {
subframe = eNB->proc.subframe_prach_br;
frame = eNB->proc.frame_prach_br;
pthread_mutex_lock(&eNB->UL_INFO_mutex);
eNB->UL_INFO.rach_ind_br.rach_indication_body.number_of_preambles=0;
pthread_mutex_unlock(&eNB->UL_INFO_mutex);
}
else
#endif
{
pthread_mutex_lock(&eNB->UL_INFO_mutex);
eNB->UL_INFO.rach_ind.rach_indication_body.number_of_preambles=0;
pthread_mutex_unlock(&eNB->UL_INFO_mutex);
subframe = eNB->proc.subframe_prach;
frame = eNB->proc.frame_prach;
}
RU_t *ru;
int aa=0;
int ru_aa;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PRACH_RX,1);
for (i=0;i<eNB->num_RU;i++) {
ru=eNB->RU_list[i];
for (ru_aa=0,aa=0;ru_aa<ru->nb_rx;ru_aa++,aa++) {
eNB->prach_vars.rxsigF[0][aa] = eNB->RU_list[i]->prach_rxsigF[ru_aa];
#ifdef Rel14
int ce_level;
if (br_flag==1)
for (ce_level=0;ce_level<4;ce_level++) eNB->prach_vars_br.rxsigF[ce_level][aa] = eNB->RU_list[i]->prach_rxsigF_br[ce_level][ru_aa];
#endif
}
}
rx_prach(eNB,
eNB->RU_list[0],
&max_preamble[0],
&max_preamble_energy[0],
&max_preamble_delay[0],
frame,
0
#ifdef Rel14
,br_flag
#endif
);
#ifdef DEBUG_PHY_PROC
LOG_D(PHY,"[RAPROC] Frame %d, subframe %d : Most likely preamble %d, energy %d dB delay %d (prach_energy counter %d)\n",
frame,subframe,
max_preamble[0],
max_preamble_energy[0]/10,
max_preamble_delay[0],
eNB->prach_energy_counter);
#endif
#ifdef Rel14
if (br_flag==1) {
int prach_mask;
prach_mask = is_prach_subframe(&eNB->frame_parms,eNB->proc.frame_prach_br,eNB->proc.subframe_prach_br);
eNB->UL_INFO.rach_ind_br.rach_indication_body.preamble_list = eNB->preamble_list_br;
int ind=0;
int ce_level=0;
/* Save for later, it doesn't work
for (int ind=0,ce_level=0;ce_level<4;ce_level++) {
if ((eNB->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_CElevel_enable[ce_level]==1)&&
(prach_mask&(1<<(1+ce_level)) > 0) && // prach is active and CE level has finished its repetitions
(eNB->prach_vars_br.repetition_number[ce_level]==
eNB->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_numRepetitionPerPreambleAttempt[ce_level])) {
*/
if (eNB->frame_parms.prach_emtc_config_common.prach_ConfigInfo.prach_CElevel_enable[0]==1){
if ((eNB->prach_energy_counter == 100) &&
(max_preamble_energy[0] > eNB->measurements.prach_I0 + 100)) {
eNB->UL_INFO.rach_ind_br.rach_indication_body.number_of_preambles++;
eNB->preamble_list_br[ind].preamble_rel8.timing_advance = max_preamble_delay[ind];//
eNB->preamble_list_br[ind].preamble_rel8.preamble = max_preamble[ind];
// note: fid is implicitly 0 here, this is the rule for eMTC RA-RNTI from 36.321, Section 5.1.4
eNB->preamble_list_br[ind].preamble_rel8.rnti = 1+subframe+(eNB->prach_vars_br.first_frame[ce_level]%40);
eNB->preamble_list_br[ind].instance_length = 0; //don't know exactly what this is
eNB->preamble_list_br[ind].preamble_rel13.rach_resource_type = 1+ce_level; // CE Level
LOG_D(PHY,"Filling NFAPI indication for RACH %d CELevel %d (mask %x) : TA %d, Preamble %d, rnti %x, rach_resource_type %d\n",
ind,
ce_level,
prach_mask,
eNB->preamble_list_br[ind].preamble_rel8.timing_advance,
eNB->preamble_list_br[ind].preamble_rel8.preamble,
eNB->preamble_list_br[ind].preamble_rel8.rnti,
eNB->preamble_list_br[ind].preamble_rel13.rach_resource_type);
}
/*
ind++;
}
} */// ce_level
}
}
else
#endif
{
if ((eNB->prach_energy_counter == 100) &&
(max_preamble_energy[0] > eNB->measurements.prach_I0+100)) {
LOG_I(PHY,"[eNB %d/%d][RAPROC] Frame %d, subframe %d Initiating RA procedure with preamble %d, energy %d.%d dB, delay %d\n",
eNB->Mod_id,
eNB->CC_id,
frame,
subframe,
max_preamble[0],
max_preamble_energy[0]/10,
max_preamble_energy[0]%10,
max_preamble_delay[0]);
T(T_ENB_PHY_INITIATE_RA_PROCEDURE, T_INT(eNB->Mod_id), T_INT(frame), T_INT(subframe),
T_INT(max_preamble[0]), T_INT(max_preamble_energy[0]), T_INT(max_preamble_delay[0]));
pthread_mutex_lock(&eNB->UL_INFO_mutex);
eNB->UL_INFO.rach_ind.rach_indication_body.number_of_preambles = 1;
eNB->UL_INFO.rach_ind.rach_indication_body.preamble_list = &eNB->preamble_list[0];
eNB->UL_INFO.rach_ind.rach_indication_body.tl.tag = NFAPI_RACH_INDICATION_BODY_TAG;
eNB->UL_INFO.rach_ind.header.message_id = NFAPI_RACH_INDICATION;
eNB->UL_INFO.rach_ind.sfn_sf = frame<<4 | subframe;
eNB->preamble_list[0].preamble_rel8.tl.tag = NFAPI_PREAMBLE_REL8_TAG;
eNB->preamble_list[0].preamble_rel8.timing_advance = max_preamble_delay[0];
eNB->preamble_list[0].preamble_rel8.preamble = max_preamble[0];
eNB->preamble_list[0].preamble_rel8.rnti = 1+subframe; // note: fid is implicitly 0 here
eNB->preamble_list[0].preamble_rel13.rach_resource_type = 0;
eNB->preamble_list[0].instance_length = 0; //don't know exactly what this is
if (nfapi_mode == 1) { // If NFAPI PNF then we need to send the message to the VNF
LOG_D(PHY,"Filling NFAPI indication for RACH : SFN_SF:%d TA %d, Preamble %d, rnti %x, rach_resource_type %d\n",
NFAPI_SFNSF2DEC(eNB->UL_INFO.rach_ind.sfn_sf),
eNB->preamble_list[0].preamble_rel8.timing_advance,
eNB->preamble_list[0].preamble_rel8.preamble,
eNB->preamble_list[0].preamble_rel8.rnti,
eNB->preamble_list[0].preamble_rel13.rach_resource_type);
oai_nfapi_rach_ind(&eNB->UL_INFO.rach_ind);
eNB->UL_INFO.rach_ind.rach_indication_body.number_of_preambles = 0;
}
pthread_mutex_unlock(&eNB->UL_INFO_mutex);
} // max_preamble_energy > prach_I0 + 100
else {
eNB->measurements.prach_I0 = ((eNB->measurements.prach_I0*900)>>10) + ((max_preamble_energy[0]*124)>>10);
if (frame==0) LOG_I(PHY,"prach_I0 = %d.%d dB\n",eNB->measurements.prach_I0/10,eNB->measurements.prach_I0%10);
if (eNB->prach_energy_counter < 100) eNB->prach_energy_counter++;
}
} // else br_flag
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PRACH_RX,0);
}