diff --git a/openair1/PHY/LTE_TRANSPORT/prach.c b/openair1/PHY/LTE_TRANSPORT/prach.c
index 2a50488ad3f14aa3a2c075853156d0e5d8d45ed5..7f01ae32ba598b5408c18aaaab8e357480e924d8 100644
--- a/openair1/PHY/LTE_TRANSPORT/prach.c
+++ b/openair1/PHY/LTE_TRANSPORT/prach.c
@@ -1648,13 +1648,13 @@ void rx_prach0(PHY_VARS_eNB *eNB,
idft1024(prachF,prach_ifft_tmp,1);
// compute energy and accumulate over receive antennas and repetitions for BR
for (i=0;i<2048;i++)
- prach_ifft[i] += (prach_ifft_tmp[i<<1]*prach_ifft_tmp[i<<1] + prach_ifft_tmp[1+(i<<1)]*prach_ifft_tmp[1+(i<<1)])>>15;
+ prach_ifft[i] += (prach_ifft_tmp[i<<1]*prach_ifft_tmp[i<<1] + prach_ifft_tmp[1+(i<<1)]*prach_ifft_tmp[1+(i<<1)])>>10;
} else {
idft256(prachF,prach_ifft_tmp,1);
log2_ifft_size = 8;
// compute energy and accumulate over receive antennas and repetitions for BR
for (i=0;i<256;i++)
- prach_ifft[i] += (prach_ifft_tmp[i<<1]*prach_ifft_tmp[(i<<1)] + prach_ifft_tmp[1+(i<<1)]*prach_ifft_tmp[1+(i<<1)])>>15;
+ prach_ifft[i] += (prach_ifft_tmp[i<<1]*prach_ifft_tmp[(i<<1)] + prach_ifft_tmp[1+(i<<1)]*prach_ifft_tmp[1+(i<<1)])>>10;
}
#ifdef PRACH_DEBUG
diff --git a/openair1/PHY/defs.h b/openair1/PHY/defs.h
index 12ddcdeb70471b2259ddfdefcfb4dae1610a93c5..bdfc3731445059ba57d0bbafa8a68ac457a50c2a 100644
--- a/openair1/PHY/defs.h
+++ b/openair1/PHY/defs.h
@@ -919,7 +919,8 @@ typedef struct {
int subband_cqi_dB[NUMBER_OF_UE_MAX][MAX_NUM_RU_PER_eNB][100];
/// Total Subband CQI and RB
int subband_cqi_tot_dB[NUMBER_OF_UE_MAX][100];
-
+ /// PRACH background noise level
+ int prach_I0;
} PHY_MEASUREMENTS_eNB;
@@ -1035,8 +1036,8 @@ typedef struct PHY_VARS_eNB_s {
/// if ==0 enables phy only test mode
int mac_enabled;
-
-
+ /// counter to average prach energh over first 100 prach opportunities
+ int prach_energy_counter;
// PDSCH Varaibles
PDSCH_CONFIG_DEDICATED pdsch_config_dedicated[NUMBER_OF_UE_MAX];
diff --git a/openair1/SCHED/phy_procedures_lte_eNb.c b/openair1/SCHED/phy_procedures_lte_eNb.c
index 5862f27b714c76b6f88700a145d83492b7f12b9a..05a6dca09b9cb572acc4a63b26abb27882c786f5 100644
--- a/openair1/SCHED/phy_procedures_lte_eNb.c
+++ b/openair1/SCHED/phy_procedures_lte_eNb.c
@@ -633,7 +633,8 @@ void prach_procedures(PHY_VARS_eNB *eNB,
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 (max_preamble_energy[0] > 350) {
+ if ((eNB->prach_energy_counter == 100) &&
+ (max_preamble_energy[0] > eNB->measurements.prach_I0 + 100)) {
eNB->UL_INFO.rach_ind_br.number_of_preambles++;
eNB->preamble_list_br[ind].preamble_rel8.timing_advance = max_preamble_delay[ind];//
@@ -661,7 +662,8 @@ void prach_procedures(PHY_VARS_eNB *eNB,
#endif
{
- if (max_preamble_energy[0] > 350) {
+ if ((eNB->prach_energy_counter == 100) &&
+ (max_preamble_energy[0] > eNB->measurements.prach_I0+100)) {
LOG_D(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,
@@ -694,22 +696,13 @@ void prach_procedures(PHY_VARS_eNB *eNB,
eNB->preamble_list[0].preamble_rel13.rach_resource_type);
pthread_mutex_unlock(&eNB->UL_INFO_mutex);
- } // max_preamble_energy > 350
+ } // 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
- /*
- mac_xface->initiate_ra_proc(eNB->Mod_id,
- eNB->CC_id,
- frame,
- preamble_max,
- preamble_delay_list[preamble_max]*update_TA/update_TA2,
- 0,subframe,0);*/
-
-
- /* } else {
- MSC_LOG_EVENT(MSC_PHY_ENB, "0 RA Failed add user, too many");
- LOG_I(PHY,"[eNB %d][RAPROC] frame %d, subframe %d: Unable to add user, max user count reached\n",
- eNB->Mod_id,frame, subframe);
- }*/
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PRACH_RX,0);
}
@@ -1952,16 +1945,27 @@ void phy_procedures_eNB_uespec_RX(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,const
// Call SRS first since all others depend on presence of SRS or lack thereof
srs_procedures(eNB,proc);
- lte_eNB_I0_measurements(eNB,
- subframe,
- 0,
- eNB->first_run_I0_measurements);
eNB->first_run_I0_measurements = 0;
uci_procedures(eNB,proc);
pusch_procedures(eNB,proc);
+ lte_eNB_I0_measurements(eNB,
+ subframe,
+ 0,
+ eNB->first_run_I0_measurements);
+
+ int min_I0=1000,max_I0=0;
+ if ((frame==0) && (subframe==6)) {
+ for (int i=0;i<eNB->frame_parms.N_RB_UL;i++) {
+ if (i==(eNB->frame_parms.N_RB_UL>>1) - 1) i+=2;
+
+ if (eNB->measurements.n0_subband_power_tot_dB[i]<min_I0) min_I0 = eNB->measurements.n0_subband_power_tot_dB[i];
+ if (eNB->measurements.n0_subband_power_tot_dB[i]>max_I0) max_I0 = eNB->measurements.n0_subband_power_tot_dB[i];
+ }
+ LOG_I(PHY,"max_I0 %d, min_I0 %d\n",max_I0,min_I0);
+ }
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_RX_UESPEC, 0 );
diff --git a/targets/RT/USER/lte-enb.c b/targets/RT/USER/lte-enb.c
index c7cc203da6ba20e2316b843e88f3da6e9edc216c..a457480c70ad02f55ad7d62a6ceae282b4fe3caf 100644
--- a/targets/RT/USER/lte-enb.c
+++ b/targets/RT/USER/lte-enb.c
@@ -943,6 +943,7 @@ void init_eNB(int single_thread_flag,int wait_for_sync) {
eNB->UL_INFO.harq_ind.harq_pdu_list = eNB->harq_pdu_list;
eNB->UL_INFO.cqi_ind.cqi_pdu_list = eNB->cqi_pdu_list;
eNB->UL_INFO.cqi_ind.cqi_raw_pdu_list = eNB->cqi_raw_pdu_list;
+ eNB->prach_energy_counter = 0;
}
}