oaisim.c 36.7 KB
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#include <string.h>
#include <math.h>
#include <unistd.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <cblas.h>
#include <execinfo.h>

#include "SIMULATION/RF/defs.h"
#include "PHY/types.h"
#include "PHY/defs.h"
#include "PHY/LTE_TRANSPORT/proto.h"
#include "PHY/vars.h"
#include "MAC_INTERFACE/vars.h"

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#include "SIMULATION/ETH_TRANSPORT/proto.h"

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//#ifdef OPENAIR2
#include "LAYER2/MAC/defs.h"
#include "LAYER2/MAC/vars.h"
#ifndef CELLULAR
#include "RRC/LITE/vars.h"
#endif
#include "PHY_INTERFACE/vars.h"
//#endif

#include "ARCH/CBMIMO1/DEVICE_DRIVER/vars.h"

#ifdef IFFT_FPGA
//#include "PHY/LTE_REFSIG/mod_table.h"
#endif //IFFT_FPGA

#include "SCHED/defs.h"
#include "SCHED/vars.h"

#ifdef XFORMS
#include "PHY/TOOLS/lte_phy_scope.h"
#endif

#ifdef SMBV
#include "PHY/TOOLS/smbv.h"
char smbv_fname[] = "smbv_config_file.smbv";
unsigned short smbv_nframes = 4; // how many frames to configure 1,..,4
unsigned short config_frames[4] = {2,9,11,13};
// unsigned short config_frames[4] = {1};
unsigned char  smbv_frame_cnt = 0;
u8 config_smbv = 0;
char smbv_ip[16];
#endif

#include "oaisim_functions.h"

#include "oaisim.h"
#include "oaisim_config.h"
#include "UTIL/OCG/OCG_extern.h"
#include "cor_SF_sim.h"
#include "UTIL/OMG/omg_constants.h"
#include "UTIL/FIFO/pad_list.h"


//#ifdef PROC
#include "../PROC/interface.h"
#include "../PROC/channel_sim_proc.h"
#include "../PROC/Tsync.h"
#include "../PROC/Process.h"
//#endif

#include "UTIL/LOG/vcd_signal_dumper.h"

#define RF

//#define DEBUG_SIM

#define MCS_COUNT 24//added for PHY abstraction
#define N_TRIALS 1

/*
  DCI0_5MHz_TDD0_t          UL_alloc_pdu;
  DCI1A_5MHz_TDD_1_6_t      CCCH_alloc_pdu;
  DCI2_5MHz_2A_L10PRB_TDD_t DLSCH_alloc_pdu1;
  DCI2_5MHz_2A_M10PRB_TDD_t DLSCH_alloc_pdu2;
 */

#define UL_RB_ALLOC computeRIV(lte_frame_parms->N_RB_UL,0,24)
#define CCCH_RB_ALLOC computeRIV(lte_frame_parms->N_RB_UL,0,3)
#define RA_RB_ALLOC computeRIV(lte_frame_parms->N_RB_UL,0,3)
#define DLSCH_RB_ALLOC 0x1fff

#define DECOR_DIST 100
#define SF_VAR 10

//constant for OAISIM soft realtime calibration
#define SF_DEVIATION_OFFSET_NS 100000 //= 0.1ms : should be as a number of UE
#define SLEEP_STEP_US       100 //  = 0.01ms could be adaptive, should be as a number of UE
#define K 2                  // averaging coefficient 
#define TARGET_SF_TIME_NS 1000000       // 1ms = 1000000 ns

//#ifdef OPENAIR2
//u16 NODE_ID[1];
//u8 NB_INST = 2;
//#endif //OPENAIR2
u32 frame=0;
int eMBMS_active = 0;
char stats_buffer[16384];
channel_desc_t *eNB2UE[NUMBER_OF_eNB_MAX][NUMBER_OF_UE_MAX];
channel_desc_t *UE2eNB[NUMBER_OF_UE_MAX][NUMBER_OF_eNB_MAX];
//Added for PHY abstraction
node_desc_t *enb_data[NUMBER_OF_eNB_MAX]; 
node_desc_t *ue_data[NUMBER_OF_UE_MAX];
// Added for PHY abstraction
extern Node_list ue_node_list;
extern Node_list enb_node_list;
extern int pdcp_period, omg_period;

extern double **s_re, **s_im, **r_re, **r_im, **r_re0, **r_im0;
int map1,map2;
extern double **ShaF;
double snr_dB, sinr_dB,snr_direction;//,sinr_direction;
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extern double snr_step;
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extern u8 set_sinr;//,set_snr=0;
extern u8 ue_connection_test;
extern u8 set_seed;
u8 cooperation_flag;          // for cooperative communication
extern u8 target_dl_mcs;
extern u8 target_ul_mcs;
u8 rate_adaptation_flag;
extern u8 abstraction_flag, ethernet_flag;
extern u16 Nid_cell;
extern struct timespec time_spec;
extern unsigned long time_last, time_now;
extern int td, td_avg, sleep_time_us;
extern LTE_DL_FRAME_PARMS *frame_parms;
//double sinr_bler_map[MCS_COUNT][2][16];
//double sinr_bler_map_up[MCS_COUNT][2][16];
//extern double SINRpost_eff[301];
//extern int mcsPost; 
//extern int  nrbPost; 
//extern int frbPost;
//extern void kpi_gen();

#ifdef XFORMS
int otg_enabled;
#endif

// this should reflect the channel models in openair1/SIMULATION/TOOLS/defs.h
mapping small_scale_names[] = {
  {"custom", custom},
  {"SCM_A", SCM_A},
  {"SCM_B", SCM_B},
  {"SCM_C", SCM_C},
  {"SCM_D", SCM_D},
  {"EPA", EPA},
  {"EVA", EVA},
  {"ETU", ETU},
  {"Rayleigh8", Rayleigh8},
  {"Rayleigh1", Rayleigh1},
  {"Rayleigh1_800", Rayleigh1_800},
  {"Rayleigh1_corr", Rayleigh1_corr},
  {"Rayleigh1_anticorr", Rayleigh1_anticorr},
  {"Rice8", Rice8},
  {"Rice1", Rice1},
  {"Rice1_corr", Rice1_corr},
  {"Rice1_anticorr", Rice1_anticorr},
  {"AWGN", AWGN},
  {NULL, -1}
};

//static void *sigh(void *arg);
void terminate(void);

void 
help (void) {
  printf
      ("Usage: oaisim -h -a -F -C tdd_config -V -R N_RB_DL -e -x transmission_mode -m target_dl_mcs -r(ate_adaptation) -n n_frames -s snr_dB -k ricean_factor -t max_delay -f forgetting factor -A channel_model -z cooperation_flag -u nb_local_ue -U UE mobility -b nb_local_enb -B eNB_mobility -M ethernet_flag -p nb_master -g multicast_group -l log_level -c ocg_enable -T traffic model -D multicast network device\n");

  printf ("-h provides this help message!\n");
  printf ("-a Activates PHY abstraction mode\n");
  printf ("-A set the multipath channel simulation,  options are: SCM_A, SCM_B, SCM_C, SCM_D, EPA, EVA, ETU, Rayleigh8, Rayleigh1, Rayleigh1_corr,Rayleigh1_anticorr, Rice8,, Rice1, AWGN \n");
  printf ("-b Set the number of local eNB\n");
  printf ("-B Set the mobility model for eNB, options are: STATIC, RWP, RWALK, \n");
  printf ("-c [1,2,3,4] Activate the config generator (OCG) to process the scenario descriptor, or give the scenario manually: -c template_1.xml \n");
  printf ("-C [0-6] Sets TDD configuration\n");
  printf ("-e Activates extended prefix mode\n");
  printf ("-E Random number generator seed\n"); 
  printf ("-f Set the forgetting factor for time-variation\n");
  printf ("-F Activates FDD transmission (TDD is default)\n");
  printf ("-g Set multicast group ID (0,1,2,3) - valid if M is set\n");
  printf ("-G Enable background traffic \n");
  printf ("-I Enable CLI interface (to connect use telnet localhost 1352)\n");
  printf ("-k Set the Ricean factor (linear)\n");
  printf ("-l Set the global log level (8:trace, 7:debug, 6:info, 4:warn, 3:error) \n");
  printf ("-L [0-1] 0 to disable new link adaptation, 1 to enable new link adapatation\n");
  printf ("-m Gives a fixed DL mcs\n");
  printf ("-M Set the machine ID for Ethernet-based emulation\n");
  printf ("-n Set the number of frames for the simulation\n");
  printf ("-O [mme ipv4 address] Enable MME mode\n");
  printf ("-p Set the total number of machine in emulation - valid if M is set\n");
  printf ("-P [trace type] Enable protocol analyzer. Possible values for OPT:\n");
  printf ("    - wireshark: Enable tracing of layers above PHY using an UDP socket\n");
  printf ("    - pcap:      Enable tracing of layers above PHY to a pcap file\n");
  printf ("    - tshark:    Not implemented yet\n");
  printf ("-Q Activate the MBMS service\n");
  printf ("-R [6,15,25,50,75,100] Sets N_RB_DL\n");
  printf ("-r Activates rate adaptation (DL for now)\n");
  printf ("-s snr_dB set a fixed (average) SNR, this deactivates the openair channel model generator (OCM)\n");
  printf ("-S snir_dB set a fixed (average) SNIR, this deactivates the openair channel model generator (OCM)\n");
  printf ("-t Set the delay spread (microseconds)\n");
  printf ("-T activate the traffic generator: cbr, mcbr, bcbr, mscbr \n");
  printf ("-u Set the number of local UE\n");
  printf ("-U Set the mobility model for UE, options are: STATIC, RWP, RWALK \n");
  printf ("-V Enable VCD dump, file = openair_vcd_dump.vcd\n");
  printf ("-w number of CBA groups, if not specified or zero, CBA is inactive\n");
  printf ("-W IP address to connect to SMBV and configure SMBV from config file. Requires compilation with SMBV=1, -W0 uses default IP 192.168.12.201\n");
  printf ("-x Set the transmission mode (1,2,5,6 supported for now)\n");
  printf ("-Y Set the global log verbosity (none, low, medium, high, full) \n");
  printf ("-z Set the cooperation flag (0 for no cooperation, 1 for delay diversity and 2 for distributed alamouti\n");
  printf ("-Z Reserved\n");
}

pthread_t log_thread;

void log_thread_init() {
  //create log_list
  //log_list_init(&log_list);
#ifndef LOG_NO_THREAD

  log_shutdown = 0;

  if((pthread_mutex_init(&log_lock, NULL) != 0) || (pthread_cond_init(&log_notify, NULL) != 0)) {
    return;
  }

  if (pthread_create(&log_thread, NULL, log_thread_function, (void*) NULL) != 0) {
    log_thread_finalize();
    return;
  }
#endif

}

//Call it after the last LOG call
int log_thread_finalize() {
  int err = 0;

#ifndef LOG_NO_THREAD

  if(pthread_mutex_lock(&log_lock) != 0) {
    return -1;
  }

  log_shutdown = 1;

  /* Wake up LOG thread */
  if((pthread_cond_broadcast(&log_notify) != 0) || (pthread_mutex_unlock(&log_lock) != 0)) {
    err = -1;
  }
  if(pthread_join(log_thread, NULL) != 0) {
    err = -1;
  }
  if(pthread_mutex_unlock(&log_lock) != 0) {
    err = -1;
  }

  if(!err) {
    //log_list_free(&log_list);
    pthread_mutex_lock(&log_lock);
    pthread_mutex_destroy(&log_lock);
    pthread_cond_destroy(&log_notify);
  }
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#endif

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  return err;
}


#ifdef OPENAIR2
int omv_write (int pfd,  Node_list enb_node_list, Node_list ue_node_list, Data_Flow_Unit omv_data){
  int i,j;
  omv_data.end=0;
  //omv_data.total_num_nodes = NB_UE_INST + NB_eNB_INST;
  for (i=0;i<NB_eNB_INST;i++) {
    if (enb_node_list != NULL) {
      omv_data.geo[i].x = (enb_node_list->node->X_pos < 0.0)? 0.0 : enb_node_list->node->X_pos;
      omv_data.geo[i].y = (enb_node_list->node->Y_pos < 0.0)? 0.0 : enb_node_list->node->Y_pos;
      omv_data.geo[i].z = 1.0;
      omv_data.geo[i].mobility_type = oai_emulation.info.omg_model_enb;
      omv_data.geo[i].node_type = 0; //eNB
      enb_node_list = enb_node_list->next;
      omv_data.geo[i].Neighbors=0;
      for (j=NB_eNB_INST; j< NB_UE_INST + NB_eNB_INST ; j++){
        if (is_UE_active(i,j - NB_eNB_INST ) == 1) {
          omv_data.geo[i].Neighbor[omv_data.geo[i].Neighbors]=  j; 
          omv_data.geo[i].Neighbors++; 
          LOG_D(OMG,"[eNB %d][UE %d] is_UE_active(i,j) %d geo (x%d, y%d) num neighbors %d\n", i,j-NB_eNB_INST, is_UE_active(i,j-NB_eNB_INST), 
                omv_data.geo[i].x, omv_data.geo[i].y, omv_data.geo[i].Neighbors);
        } 
      } 
    }
  }
  for (i=NB_eNB_INST;i<NB_UE_INST+NB_eNB_INST;i++) {
    if (ue_node_list != NULL) {
      omv_data.geo[i].x = (ue_node_list->node->X_pos < 0.0) ? 0.0 : ue_node_list->node->X_pos;
      omv_data.geo[i].y = (ue_node_list->node->Y_pos < 0.0) ? 0.0 : ue_node_list->node->Y_pos;
      omv_data.geo[i].z = 1.0;
      omv_data.geo[i].mobility_type = oai_emulation.info.omg_model_ue;
      omv_data.geo[i].node_type = 1; //UE
      //trial
      omv_data.geo[i].state = 1;
      omv_data.geo[i].rnti = 88;
      omv_data.geo[i].connected_eNB = 0;
      omv_data.geo[i].RSRP = 66;
      omv_data.geo[i].RSRQ = 55;
      omv_data.geo[i].Pathloss = 44;
      omv_data.geo[i].RSSI[0] = 33;
      omv_data.geo[i].RSSI[1] = 22;
      omv_data.geo[i].RSSI[2] = 11;
      
      ue_node_list = ue_node_list->next;
      omv_data.geo[i].Neighbors=0;
      for (j=0; j< NB_eNB_INST ; j++){
        if (is_UE_active(j,i-NB_eNB_INST) == 1) {
          omv_data.geo[i].Neighbor[ omv_data.geo[i].Neighbors]=j;       
          omv_data.geo[i].Neighbors++; 
          LOG_D(OMG,"[UE %d][eNB %d] is_UE_active  %d geo (x%d, y%d) num neighbors %d\n", i-NB_eNB_INST,j, is_UE_active(j,i-NB_eNB_INST), 
                omv_data.geo[i].x, omv_data.geo[i].y, omv_data.geo[i].Neighbors);
        } 
      }
    }
  }

  if( write( pfd, &omv_data, sizeof(struct Data_Flow_Unit) ) == -1 )
    perror( "write omv failed" );
  return 1;
}

void omv_end (int pfd, Data_Flow_Unit omv_data) {
  omv_data.end=1;
  if( write( pfd, &omv_data, sizeof(struct Data_Flow_Unit) ) == -1 )
    perror( "write omv failed" );
}
#endif 

Packet_OTG_List *otg_pdcp_buffer;

int
    main (int argc, char **argv)
{
  s32 i;
  // pointers signal buffers (s = transmit, r,r0 = receive)

  clock_t t;


  // Framing variables
  s32 slot, last_slot, next_slot;

  //FILE *SINRpost;
  //char SINRpost_fname[512];
  // sprintf(SINRpost_fname,"postprocSINR.m");
  //SINRpost = fopen(SINRpost_fname,"w");
  // variables/flags which are set by user on command-line

#ifdef SMBV
  strcpy(smbv_ip,DEFAULT_SMBV_IP);
#endif

  s32 UE_id, eNB_id;

  // time calibration for soft realtime mode  

  lte_subframe_t direction;

#ifdef OPENAIR2
  int pfd[2]; // fd for omv : fixme: this could be a local var
#endif   

  char fname[64],vname[64];
  // u8 awgn_flag = 0;
#ifdef XFORMS
  // current status is that every UE has a DL scope for a SINGLE eNB (eNB_id=0)
  // at eNB 0, an UL scope for every UE 
  FD_lte_phy_scope_ue  *form_ue[NUMBER_OF_UE_MAX];
  FD_lte_phy_scope_enb *form_enb[NUMBER_OF_UE_MAX];
  char title[255];
#endif

#ifdef PRINT_STATS
  int len;
  FILE *UE_stats[NUMBER_OF_UE_MAX], *UE_stats_th[NUMBER_OF_UE_MAX], *eNB_stats, *eNB_avg_thr, *eNB_l2_stats;
  char UE_stats_filename[255];
  char UE_stats_th_filename[255];
  char eNB_stats_th_filename[255];
 #endif


  //time_t t0,t1;
  //clock_t start, stop;
  

#ifdef OPENAIR2
  Data_Flow_Unit omv_data ;
#endif //ALU

#ifdef PROC
  int node_id;
  int port,Process_Flag=0,wgt,Channel_Flag=0,temp;
#endif
  //double **s_re2[MAX_eNB+MAX_UE], **s_im2[MAX_eNB+MAX_UE], **r_re2[MAX_eNB+MAX_UE], **r_im2[MAX_eNB+MAX_UE], **r_re02, **r_im02;
  //double **r_re0_d[MAX_UE][MAX_eNB], **r_im0_d[MAX_UE][MAX_eNB], **r_re0_u[MAX_eNB][MAX_UE],**r_im0_u[MAX_eNB][MAX_UE];
  //default parameters
  rate_adaptation_flag = 0;
  oai_emulation.info.n_frames = 0xffff;//1024;          //10;
  oai_emulation.info.n_frames_flag = 0;//fixme
  snr_dB = 30;
  cooperation_flag = 0;         // default value 0 for no cooperation, 1 for Delay diversity, 2 for Distributed Alamouti

  //Default values if not changed by the user in get_simulation_options();
  pdcp_period = 1;
  omg_period = 10;
  // start thread for log gen
  log_thread_init();

  init_oai_emulation(); // to initialize everything !!!
  
  // get command-line options
  get_simulation_options(argc, argv); //Command-line options

  // Initialize VCD LOG module
  vcd_signal_dumper_init("openair_dump.vcd");

  /*  pthread_t sigth;
  sigset_t sigblock;
  sigemptyset(&sigblock);
  sigaddset(&sigblock, SIGHUP);
  sigaddset(&sigblock, SIGINT);
  sigaddset(&sigblock, SIGTERM);
  pthread_sigmask(SIG_BLOCK, &sigblock, NULL);
  if (pthread_create(&sigth, NULL, sigh, NULL)) {
    msg("Pthread for tracing Signals is not created!\n");
    return -1;
  } else {
    msg("Pthread for tracing Signals is created!\n");
    }*/
  // configure oaisim with OCG
  oaisim_config(); // config OMG and OCG, OPT, OTG, OLG

#ifdef OPENAIR2
  init_omv();
#endif

  check_and_adjust_params(); //Before this call, NB_UE_INST and NB_eNB_INST are not set correctly

  init_otg_pdcp_buffer();

#ifdef PRINT_STATS
  for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
    sprintf(UE_stats_filename,"UE_stats%d_tx%d.txt",UE_id,oai_emulation.info.transmission_mode);
    UE_stats[UE_id] = fopen (UE_stats_filename, "w");
  }
  eNB_stats = fopen ("eNB_stats.txt", "w");
  printf ("UE_stats=%p, eNB_stats=%p\n", UE_stats, eNB_stats);
  
  if(abstraction_flag==0){
    for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
      sprintf(UE_stats_th_filename,"UE_stats_th%d_tx%d.txt",UE_id,oai_emulation.info.transmission_mode);
      UE_stats_th[UE_id] = fopen (UE_stats_th_filename, "w");
    }
    sprintf(eNB_stats_th_filename,"eNB_stats_th_tx%d.txt",oai_emulation.info.transmission_mode);
    eNB_avg_thr = fopen (eNB_stats_th_filename, "w"); 
  } else{
    for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
      sprintf(UE_stats_th_filename,"UE_stats_abs_th%d_tx%d.txt",UE_id,oai_emulation.info.transmission_mode);
      UE_stats_th[UE_id] = fopen (UE_stats_th_filename, "w");
    }
    sprintf(eNB_stats_th_filename,"eNB_stats_abs_th_tx%d.txt",oai_emulation.info.transmission_mode);
    eNB_avg_thr = fopen (eNB_stats_th_filename, "w"); 
  } 
#ifdef OPENAIR2
    eNB_l2_stats = fopen ("eNB_l2_stats.txt", "w");
    LOG_I(EMU,"eNB_l2_stats=%p\n", eNB_l2_stats);
#endif 

#endif

  LOG_I(EMU,"total number of UE %d (local %d, remote %d) mobility %s \n", NB_UE_INST,oai_emulation.info.nb_ue_local,oai_emulation.info.nb_ue_remote, oai_emulation.topology_config.mobility.eNB_mobility.eNB_mobility_type.selected_option);
  LOG_I(EMU,"Total number of eNB %d (local %d, remote %d) mobility %s \n", NB_eNB_INST,oai_emulation.info.nb_enb_local,oai_emulation.info.nb_enb_remote, oai_emulation.topology_config.mobility.UE_mobility.UE_mobility_type.selected_option);
  LOG_I(OCM,"Running with frame_type %d, Nid_cell %d, N_RB_DL %d, EP %d, mode %d, target dl_mcs %d, rate adaptation %d, nframes %d, abstraction %d, channel %s\n",
        oai_emulation.info.frame_type, Nid_cell, oai_emulation.info.N_RB_DL, oai_emulation.info.extended_prefix_flag, oai_emulation.info.transmission_mode,target_dl_mcs,rate_adaptation_flag,oai_emulation.info.n_frames,abstraction_flag,oai_emulation.environment_system_config.fading.small_scale.selected_option);
  
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  set_seed = oai_emulation.emulation_config.seed.value;
  
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  init_seed(set_seed);

  init_openair1();

  init_openair2();

  init_ocm();

#ifdef XFORMS
  eNB_id = 0;
  for (UE_id = 0; UE_id < NB_UE_INST; UE_id++) {
      // DL scope at UEs
      fl_initialize (&argc, argv, NULL, 0, 0);
      form_ue[UE_id] = create_lte_phy_scope_ue();
      sprintf (title, "LTE DL SCOPE eNB %d to UE %d", eNB_id, UE_id);
      fl_show_form (form_ue[UE_id]->lte_phy_scope_ue, FL_PLACE_HOTSPOT, FL_FULLBORDER, title);

      // UL scope at eNB 0
      fl_initialize (&argc, argv, NULL, 0, 0);
      form_enb[UE_id] = create_lte_phy_scope_enb();
      sprintf (title, "LTE UL SCOPE UE %d to eNB %d", UE_id, eNB_id);
      fl_show_form (form_enb[UE_id]->lte_phy_scope_enb, FL_PLACE_HOTSPOT, FL_FULLBORDER, title);

      if (openair_daq_vars.use_ia_receiver == 1) {
          fl_set_button(form_ue[UE_id]->button_0,1);
          fl_set_object_label(form_ue[UE_id]->button_0, "IA Receiver ON");
          fl_set_object_color(form_ue[UE_id]->button_0, FL_GREEN, FL_GREEN);
      }

  }
#endif

#ifdef SMBV
  smbv_init_config(smbv_fname, smbv_nframes);
  smbv_write_config_from_frame_parms(smbv_fname, &PHY_vars_eNB_g[0]->lte_frame_parms);
#endif


  printf ("before L2 init: Nid_cell %d\n", PHY_vars_eNB_g[0]->lte_frame_parms.Nid_cell);
  printf ("before L2 init: frame_type %d,tdd_config %d\n", 
          PHY_vars_eNB_g[0]->lte_frame_parms.frame_type,
          PHY_vars_eNB_g[0]->lte_frame_parms.tdd_config);

  init_time();

  LOG_I(EMU,">>>>>>>>>>>>>>>>>>>>>>>>>>> OAIEMU initialization done <<<<<<<<<<<<<<<<<<<<<<<<<<\n\n");
  printf ("after init: Nid_cell %d\n", PHY_vars_eNB_g[0]->lte_frame_parms.Nid_cell);
  printf ("after init: frame_type %d,tdd_config %d\n", 
          PHY_vars_eNB_g[0]->lte_frame_parms.frame_type,
          PHY_vars_eNB_g[0]->lte_frame_parms.tdd_config);


  if (ue_connection_test == 1) {
    snr_direction = -snr_step;
    snr_dB=20;
    sinr_dB=-20;
  }

  t = clock();

  for (frame=0; frame<oai_emulation.info.n_frames; frame++) {
    /*
    // Handling the cooperation Flag
    if (cooperation_flag == 2)
      {
        if ((PHY_vars_eNB_g[0]->eNB_UE_stats[0].mode == PUSCH) && (PHY_vars_eNB_g[0]->eNB_UE_stats[1].mode == PUSCH))
          PHY_vars_eNB_g[0]->cooperation_flag = 2;
      }
    */
    if (ue_connection_test==1) {
      if ((frame%20) == 0) {
        snr_dB += snr_direction;
        sinr_dB -= snr_direction;
      }
      if (snr_dB == -20) {
        snr_direction=snr_step;
      }
      else if (snr_dB==20) {
        snr_direction=-snr_step;
      }
    }

    oai_emulation.info.frame = frame; 
    //oai_emulation.info.time_ms += 1;  
    oai_emulation.info.time_s += 0.1; // emu time in s, each frame lasts for 10 ms // JNote: TODO check the coherency of the time and frame (I corrected it to 10 (instead of 0.01)
    // if n_frames not set by the user or is greater than max num frame then set adjust the frame counter
    if ( (oai_emulation.info.n_frames_flag == 0) || (oai_emulation.info.n_frames >= 0xffff) ){ 
      frame %=(oai_emulation.info.n_frames-1);
    } 
    
    update_omg(); // frequency is defined in the omg_global params configurable by the user

    update_omg_ocm();

#ifdef OPENAIR2
    // check if pipe is still open
    if ((oai_emulation.info.omv_enabled == 1) ){
      omv_write(pfd[1], enb_node_list, ue_node_list, omv_data);
    }
#endif    
#ifdef DEBUG_OMG
    if ((((int) oai_emulation.info.time_s) % 100) == 0) {
      for (UE_id = oai_emulation.info.first_ue_local; UE_id < (oai_emulation.info.first_ue_local + oai_emulation.info.nb_ue_local); UE_id++) {
        get_node_position (UE, UE_id);
      }
    }
#endif 

    update_ocm();

    for (slot=0 ; slot<20 ; slot++) {

      last_slot = (slot - 1)%20;
      if (last_slot <0)
        last_slot+=20;
      next_slot = (slot + 1)%20;
      
      oai_emulation.info.time_ms = frame * 10 + (slot>>1) ;
      
      direction = subframe_select(frame_parms,next_slot>>1);
#ifdef PROC      
      if(Channel_Flag==1)
        Channel_Func(s_re2,s_im2,r_re2,r_im2,r_re02,r_im02,r_re0_d,r_im0_d,r_re0_u,r_im0_u,eNB2UE,UE2eNB,enb_data,ue_data,abstraction_flag,frame_parms,slot);

      if(Channel_Flag==0)
#endif
      {
        if((next_slot %2) ==0)
          clear_eNB_transport_info(oai_emulation.info.nb_enb_local);

        for (eNB_id=oai_emulation.info.first_enb_local;
             (eNB_id<(oai_emulation.info.first_enb_local+oai_emulation.info.nb_enb_local)) && (oai_emulation.info.cli_start_enb[eNB_id]==1);
             eNB_id++) {
          //printf ("debug: Nid_cell %d\n", PHY_vars_eNB_g[eNB_id]->lte_frame_parms.Nid_cell);
          //printf ("debug: frame_type %d,tdd_config %d\n", PHY_vars_eNB_g[eNB_id]->lte_frame_parms.frame_type,PHY_vars_eNB_g[eNB_id]->lte_frame_parms.tdd_config);
          LOG_D(EMU,"PHY procedures eNB %d for frame %d, slot %d (subframe TX %d, RX %d) TDD %d/%d Nid_cell %d\n",
                eNB_id, frame, slot, next_slot >> 1,last_slot>>1,
                PHY_vars_eNB_g[eNB_id]->lte_frame_parms.frame_type,
                PHY_vars_eNB_g[eNB_id]->lte_frame_parms.tdd_config,PHY_vars_eNB_g[eNB_id]->lte_frame_parms.Nid_cell);

          //Appliation: traffic gen
          update_otg_eNB(eNB_id, oai_emulation.info.time_ms);

          //IP/OTG to PDCP and PDCP to IP operation
          pdcp_run(frame, 1, 0, eNB_id);//PHY_vars_eNB_g[eNB_id]->Mod_id

          //PHY_vars_eNB_g[eNB_id]->frame = frame;
          phy_procedures_eNB_lte (last_slot, next_slot, PHY_vars_eNB_g[eNB_id], abstraction_flag);

#ifdef PRINT_STATS
      	if(last_slot==9 && frame%10==0)
	  if(eNB_avg_thr)
	    fprintf(eNB_avg_thr,"%d %d\n",PHY_vars_eNB_g[eNB_id]->frame,(PHY_vars_eNB_g[eNB_id]->total_system_throughput)/((PHY_vars_eNB_g[eNB_id]->frame+1)*10));
	if (eNB_stats) {
	  len = dump_eNB_stats(PHY_vars_eNB_g[eNB_id], stats_buffer, 0);
	  rewind (eNB_stats);
	  fwrite (stats_buffer, 1, len, eNB_stats);
	  fflush(eNB_stats);
	}
#ifdef OPENAIR2
	if (eNB_l2_stats) {
	  len = dump_eNB_l2_stats (stats_buffer, 0);
	  rewind (eNB_l2_stats);
	  fwrite (stats_buffer, 1, len, eNB_l2_stats);
	  fflush(eNB_l2_stats);
	}
#endif 	
#endif
        }
        // Call ETHERNET emulation here
        //emu_transport (frame, last_slot, next_slot, direction, oai_emulation.info.frame_type, ethernet_flag);

        if ((next_slot % 2) == 0)
          clear_UE_transport_info (oai_emulation.info.nb_ue_local);

        for (UE_id = oai_emulation.info.first_ue_local;
             (UE_id < (oai_emulation.info.first_ue_local+oai_emulation.info.nb_ue_local)) && (oai_emulation.info.cli_start_ue[UE_id]==1);
             UE_id++)
          if (frame >= (UE_id * 20)) {    // activate UE only after 20*UE_id frames so that different UEs turn on separately

          LOG_D(EMU,"PHY procedures UE %d for frame %d, slot %d (subframe TX %d, RX %d)\n",
                UE_id, frame, slot, next_slot >> 1,last_slot>>1);

          if (PHY_vars_UE_g[UE_id]->UE_mode[0] != NOT_SYNCHED) {
            if (frame>0) {
              PHY_vars_UE_g[UE_id]->frame = frame;

              //Application
              update_otg_UE(UE_id + NB_eNB_INST, oai_emulation.info.time_ms);

              //Access layer
              pdcp_run(frame, 0, UE_id, 0);

              phy_procedures_UE_lte (last_slot, next_slot, PHY_vars_UE_g[UE_id], 0, abstraction_flag,normal_txrx);
              ue_data[UE_id]->tx_power_dBm = PHY_vars_UE_g[UE_id]->tx_power_dBm;
            }
          }
          else {
            if (abstraction_flag==1){
              LOG_E(EMU, "sync not supported in abstraction mode (UE%d,mode%d)\n", UE_id, PHY_vars_UE_g[UE_id]->UE_mode[0]);
              exit(-1);
            }
            if ((frame>0) && (last_slot == (LTE_SLOTS_PER_FRAME-2))) {
              initial_sync(PHY_vars_UE_g[UE_id],normal_txrx);
              
              /*
              write_output("dlchan00.m","dlch00",&(PHY_vars_UE_g[0]->lte_ue_common_vars.dl_ch_estimates[0][0][0]),(6*(PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size)),1,1);
              if (PHY_vars_UE_g[0]->lte_frame_parms.nb_antennas_rx>1)
                write_output("dlchan01.m","dlch01",&(PHY_vars_UE_g[0]->lte_ue_common_vars.dl_ch_estimates[0][1][0]),(6*(PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size)),1,1);
              write_output("dlchan10.m","dlch10",&(PHY_vars_UE_g[0]->lte_ue_common_vars.dl_ch_estimates[0][2][0]),(6*(PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size)),1,1);
              if (PHY_vars_UE_g[0]->lte_frame_parms.nb_antennas_rx>1)
                write_output("dlchan11.m","dlch11",&(PHY_vars_UE_g[0]->lte_ue_common_vars.dl_ch_estimates[0][3][0]),(6*(PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size)),1,1);
              write_output("rxsig.m","rxs",PHY_vars_UE_g[0]->lte_ue_common_vars.rxdata[0],PHY_vars_UE_g[0]->lte_frame_parms.samples_per_tti*10,1,1);
              write_output("rxsigF.m","rxsF",PHY_vars_UE_g[0]->lte_ue_common_vars.rxdataF[0],2*PHY_vars_UE_g[0]->lte_frame_parms.symbols_per_tti*PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size,2,1);
              write_output("pbch_rxF_ext0.m","pbch_ext0",PHY_vars_UE_g[0]->lte_ue_pbch_vars[0]->rxdataF_ext[0],6*12*4,1,1);
              write_output("pbch_rxF_comp0.m","pbch_comp0",PHY_vars_UE_g[0]->lte_ue_pbch_vars[0]->rxdataF_comp[0],6*12*4,1,1);
              write_output("pbch_rxF_llr.m","pbch_llr",PHY_vars_UE_g[0]->lte_ue_pbch_vars[0]->llr,(frame_parms->Ncp==0) ? 1920 : 1728,1,4);
              */
            }
          }
#ifdef PRINT_STATS
       	  if(last_slot==2 && frame%10==0)
	  if (UE_stats_th[UE_id])
	    fprintf(UE_stats_th[UE_id],"%d %d\n",frame, PHY_vars_UE_g[UE_id]->bitrate[0]/1000);
	  if (UE_stats[UE_id]) {
	    len = dump_ue_stats (PHY_vars_UE_g[UE_id], stats_buffer, 0, normal_txrx, 0);
	    rewind (UE_stats[UE_id]);
	    fwrite (stats_buffer, 1, len, UE_stats[UE_id]);
	    fflush(UE_stats[UE_id]);
	  }
#endif
        }
      emu_transport (frame, last_slot, next_slot,direction, oai_emulation.info.frame_type, ethernet_flag);
      if ((direction  == SF_DL)|| (frame_parms->frame_type==0)){
         // consider only sec id 0
	/*	for (eNB_id=0;eNB_id<NB_eNB_INST;eNB_id++) {
	  if (abstraction_flag == 0) {
	    do_OFDM_mod(PHY_vars_eNB_g[eNB_id]->lte_eNB_common_vars.txdataF[0],
			  PHY_vars_eNB_g[eNB_id]->lte_eNB_common_vars.txdata[0],
			  frame,next_slot,
			  frame_parms);
	  }
	  }*/
	for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
	  do_DL_sig(r_re0,r_im0,r_re,r_im,s_re,s_im,eNB2UE,enb_data,ue_data,next_slot,abstraction_flag,frame_parms,UE_id);
	}
      }
      if ((direction  == SF_UL)|| (frame_parms->frame_type==0)){//if ((subframe<2) || (subframe>4))
          do_UL_sig(r_re0,r_im0,r_re,r_im,s_re,s_im,UE2eNB,enb_data,ue_data,next_slot,abstraction_flag,frame_parms,frame);
	  /*   
	       int ccc;
	       fprintf(SINRpost,"SINRdb For eNB New Subframe : \n ");
	       for(ccc = 0 ; ccc<301; ccc++)
	       {
	       fprintf(SINRpost,"_ %f ", SINRpost_eff[ccc]);
	       }
                fprintf(SINRpost,"SINRdb For eNB : %f \n ", SINRpost_eff[ccc]);
	*/   
      }
      if ((direction == SF_S)) {//it must be a special subframe
        if (next_slot%2==0) {//DL part
	  /*  for (eNB_id=0;eNB_id<NB_eNB_INST;eNB_id++) {
	    if (abstraction_flag == 0) {
	      do_OFDM_mod(PHY_vars_eNB_g[eNB_id]->lte_eNB_common_vars.txdataF[0],
			  PHY_vars_eNB_g[eNB_id]->lte_eNB_common_vars.txdata[0],
			  frame,next_slot,
			  frame_parms);
	    }
	    }*/
	  for (UE_id=0;UE_id<NB_UE_INST;UE_id++) {
	    do_DL_sig(r_re0,r_im0,r_re,r_im,s_re,s_im,eNB2UE,enb_data,ue_data,next_slot,abstraction_flag,frame_parms,UE_id);
	  }
          /*
            for (aarx=0;aarx<UE2eNB[1][0]->nb_rx;aarx++)
            for (aatx=0;aatx<UE2eNB[1][0]->nb_tx;aatx++)
            for (k=0;k<UE2eNB[1][0]->channel_length;k++)
            printf("SB(%d,%d,%d)->(%f,%f)\n",k,aarx,aatx,UE2eNB[1][0]->ch[aarx+(aatx*UE2eNB[1][0]->nb_rx)][k].r,UE2eNB[1][0]->ch[aarx+(aatx*UE2eNB[1][0]->nb_rx)][k].i);
          */
        }
        else {// UL part
	  do_UL_sig(r_re0,r_im0,r_re,r_im,s_re,s_im,UE2eNB,enb_data,ue_data,next_slot,abstraction_flag,frame_parms,frame);
	          
	  /*        int ccc;
            fprintf(SINRpost,"SINRdb For eNB New Subframe : \n ");
            for(ccc = 0 ; ccc<301; ccc++)
            {
              fprintf(SINRpost,"_ %f ", SINRpost_eff[ccc]);
            }
            fprintf(SINRpost,"SINRdb For eNB : %f \n ", SINRpost_eff[ccc]);
          }
    */    }
	}
        if ((last_slot == 1) && (frame == 0)
          && (abstraction_flag == 0) && (oai_emulation.info.n_frames == 1)) {

          write_output ("dlchan0.m", "dlch0",
                        &(PHY_vars_UE_g[0]->lte_ue_common_vars.dl_ch_estimates[0][0][0]),
                        (6 * (PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size)), 1, 1);
          write_output ("dlchan1.m", "dlch1",
                        &(PHY_vars_UE_g[0]->lte_ue_common_vars.dl_ch_estimates[1][0][0]),
                        (6 * (PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size)), 1, 1);
          write_output ("dlchan2.m", "dlch2",
                        &(PHY_vars_UE_g[0]->lte_ue_common_vars.dl_ch_estimates[2][0][0]),
                        (6 * (PHY_vars_UE_g[0]->lte_frame_parms.ofdm_symbol_size)), 1, 1);
          write_output ("pbch_rxF_comp0.m", "pbch_comp0",
                        PHY_vars_UE_g[0]->lte_ue_pbch_vars[0]->rxdataF_comp[0], 6 * 12 * 4, 1, 1);
          write_output ("pbch_rxF_llr.m", "pbch_llr",
                        PHY_vars_UE_g[0]->lte_ue_pbch_vars[0]->llr, (frame_parms->Ncp == 0) ? 1920 : 1728, 1, 4);
        }
        /*
         if ((last_slot==1) && (frame==1)) {
         write_output("dlsch_rxF_comp0.m","dlsch0_rxF_comp0",PHY_vars_UE->lte_ue_pdsch_vars[eNB_id]->rxdataF_comp[0],300*(-(PHY_vars_UE->lte_frame_parms.Ncp*2)+14),1,1);
         write_output("pdcch_rxF_comp0.m","pdcch0_rxF_comp0",PHY_vars_UE->lte_ue_pdcch_vars[eNB_id]->rxdataF_comp[0],4*300,1,1);
         }
       */

        if (next_slot %2 == 0){
          clock_gettime (CLOCK_REALTIME, &time_spec);
          time_last = time_now;
          time_now = (unsigned long) time_spec.tv_nsec;
          td = (int) (time_now - time_last);
          if (td>0) {
            td_avg = (int)(((K*(long)td) + (((1<<3)-K)*((long)td_avg)))>>3); // in us
            LOG_T(EMU,"sleep frame %d, time_now %ldus,time_last %ldus,average time difference %ldns, CURRENT TIME DIFF %dus, avgerage difference from the target %dus\n",
                  frame, time_now,time_last,td_avg, td/1000,(td_avg-TARGET_SF_TIME_NS)/1000);
          }
          if (td_avg<(TARGET_SF_TIME_NS - SF_DEVIATION_OFFSET_NS)){
            sleep_time_us += SLEEP_STEP_US;
            LOG_D(EMU,"Faster than realtime increase the avg sleep time for %d us, frame %d\n",
                  sleep_time_us,frame);
            // LOG_D(EMU,"Faster than realtime increase the avg sleep time for %d us, frame %d, time_now %ldus,time_last %ldus,average time difference %ldns, CURRENT TIME DIFF %dus, avgerage difference from the target %dus\n",    sleep_time_us,frame, time_now,time_last,td_avg, td/1000,(td_avg-TARGET_SF_TIME_NS)/1000);
          }
          else if (td_avg > (TARGET_SF_TIME_NS + SF_DEVIATION_OFFSET_NS)) {
            sleep_time_us-= SLEEP_STEP_US;
            LOG_D(EMU,"Slower than realtime reduce the avg sleep time for %d us, frame %d, time_now\n",
                  sleep_time_us,frame);
            //LOG_T(EMU,"Slower than realtime reduce the avg sleep time for %d us, frame %d, time_now %ldus,time_last %ldus,average time difference %ldns, CURRENT TIME DIFF %dus, avgerage difference from the target %dus\n",     sleep_time_us,frame, time_now,time_last,td_avg, td/1000,(td_avg-TARGET_SF_TIME_NS)/1000);
          }
        } // end if next_slot%2
      }// if Channel_Flag==0

    }                          //end of slot
    
    if ((frame>=1)&&(frame<=9)&&(abstraction_flag==0)
#ifdef PROC
      &&(Channel_Flag==0)
#endif
      ){
      write_output("UEtxsig0.m","txs0", PHY_vars_UE_g[0]->lte_ue_common_vars.txdata[0],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
      sprintf(fname,"eNBtxsig%d.m",frame);
      sprintf(vname,"txs%d",frame);
      write_output(fname,vname, PHY_vars_eNB_g[0]->lte_eNB_common_vars.txdata[0][0],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
      write_output("eNBtxsigF0.m","txsF0",PHY_vars_eNB_g[0]->lte_eNB_common_vars.txdataF[0][0],PHY_vars_eNB_g[0]->lte_frame_parms.symbols_per_tti*PHY_vars_eNB_g[0]->lte_frame_parms.ofdm_symbol_size,1,1);

      write_output("UErxsig0.m","rxs0", PHY_vars_UE_g[0]->lte_ue_common_vars.rxdata[0],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
      write_output("eNBrxsig0.m","rxs0", PHY_vars_eNB_g[0]->lte_eNB_common_vars.rxdata[0][0],FRAME_LENGTH_COMPLEX_SAMPLES,1,1);
    } 

#ifdef XFORMS
    eNB_id = 0;
    for (UE_id = 0; UE_id < NB_UE_INST; UE_id++) {
      phy_scope_UE(form_ue[UE_id], 
		   PHY_vars_UE_g[UE_id],
		   eNB_id,
		   UE_id,
		   7);
      
      phy_scope_eNB(form_enb[UE_id], 
		    PHY_vars_eNB_g[eNB_id],
		    UE_id);
      
    }
#endif  

    // calibrate at the end of each frame if there is some time  left
    if((sleep_time_us > 0)&& (ethernet_flag ==0)){
      LOG_I(EMU,"[TIMING] Adjust average frame duration, sleep for %d us\n",sleep_time_us);
      usleep(sleep_time_us);
      sleep_time_us=0; // reset the timer, could be done per n SF 
    }
#ifdef SMBV
    if ((frame == config_frames[0]) || (frame == config_frames[1]) || (frame == config_frames[2]) || (frame == config_frames[3])) {
        smbv_frame_cnt++;        
    }
#endif
  }     //end of frame

  t = clock() - t;
  printf ("rrc Duration of the simulation: %f seconds\n",((float)t)/CLOCKS_PER_SEC);

  //  fclose(SINRpost);
  LOG_I(EMU,">>>>>>>>>>>>>>>>>>>>>>>>>>> OAIEMU Ending <<<<<<<<<<<<<<<<<<<<<<<<<<\n\n");

  free(otg_pdcp_buffer);

#ifdef SMBV
  if (config_smbv) {
      smbv_send_config (smbv_fname,smbv_ip);
  }
#endif

  //Perform KPI measurements
  if (oai_emulation.info.otg_enabled==1)
    kpi_gen();

  // relase all rx state
  if (ethernet_flag == 1) {
    emu_transport_release ();
  }

#ifdef PROC
  if (abstraction_flag == 0 && Channel_Flag==0 && Process_Flag==0) 
#else
    if (abstraction_flag == 0)
#endif
    {
    /*
       #ifdef IFFT_FPGA
       free(txdataF2[0]);
       free(txdataF2[1]);
       free(txdataF2);
       free(txdata[0]);
       free(txdata[1]);
       free(txdata);
       #endif
     */

    for (i = 0; i < 2; i++) {
      free (s_re[i]);
      free (s_im[i]);
      free (r_re[i]);
      free (r_im[i]);
    }
    free (s_re);
    free (s_im);
    free (r_re);
    free (r_im);

    lte_sync_time_free ();
  }
  //  pthread_join(sigth, NULL);

  // added for PHY abstraction
  if (oai_emulation.info.ocm_enabled == 1) {
    for (eNB_id = 0; eNB_id < NUMBER_OF_eNB_MAX; eNB_id++) 
      free(enb_data[eNB_id]); 
    
    for (UE_id = 0; UE_id < NUMBER_OF_UE_MAX; UE_id++)
      free(ue_data[UE_id]); 
  } //End of PHY abstraction changes

#ifdef OPENAIR2
  mac_top_cleanup();
#endif 
  
#ifdef PRINT_STATS
  for(UE_id=0;UE_id<NB_UE_INST;UE_id++) {
    if (UE_stats[UE_id]) 
      fclose (UE_stats[UE_id]);
    if(UE_stats_th[UE_id])
      fclose (UE_stats_th[UE_id]);
  }
  if (eNB_stats)
    fclose (eNB_stats);
  if (eNB_avg_thr)
    fclose (eNB_avg_thr);
  if (eNB_l2_stats)
    fclose (eNB_l2_stats);
  
#endif

  // stop OMG
  stop_mobility_generator(oai_emulation.info.omg_model_ue);//omg_param_list.mobility_type
#ifdef OPENAIR2
  if (oai_emulation.info.omv_enabled == 1)
    omv_end(pfd[1],omv_data);
#endif
  if ((oai_emulation.info.ocm_enabled == 1) && (ethernet_flag == 0) && (ShaF != NULL)) 
    destroyMat(ShaF,map1, map2);

  if ((oai_emulation.info.opt_enabled == 1) )
    terminate_opt();
  
  if (oai_emulation.info.cli_enabled)
    cli_server_cleanup();

  //bring oai if down
  terminate();
  log_thread_finalize();
  logClean();
  vcd_signal_dumper_close();
  
  return(0);
}

/*
static void *sigh(void *arg) {

  int signum;
  sigset_t sigcatch;
  sigemptyset(&sigcatch);
  sigaddset(&sigcatch, SIGHUP);
  sigaddset(&sigcatch, SIGINT);
  sigaddset(&sigcatch, SIGTERM);
  
  for (;;) {
    sigwait(&sigcatch, &signum);
    switch (signum) {
    case SIGHUP:
    case SIGINT:
    case SIGTERM:
      terminate();
    default:
      break;
    }
  }
  pthread_exit(NULL);
}
*/

void terminate(void) {
  int i;
  char interfaceName[8];
  for (i=0; i < NUMBER_OF_eNB_MAX+NUMBER_OF_UE_MAX; i++)
    if (oai_emulation.info.oai_ifup[i]==1){
    sprintf(interfaceName, "oai%d", i);
    bringInterfaceUp(interfaceName,0);
  }
}