diff --git a/targets/RT/USER/lte-enb.c b/targets/RT/USER/lte-enb.c
index 9ac7da46e7..a93a52a1a9 100755
--- a/targets/RT/USER/lte-enb.c
+++ b/targets/RT/USER/lte-enb.c
@@ -165,6 +165,8 @@ static inline int rxtx(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc, char *thread_nam
 
   // *******************************************************************
 
+    RU_t *ru = RC.ru[0];
+
   if (nfapi_mode == 1) {
 
     // I am a PNF and I need to let nFAPI know that we have a (sub)frame tick
@@ -230,6 +232,36 @@ static inline int rxtx(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc, char *thread_nam
     if (release_thread(&proc[1].mutex_rxtx,&proc[1].pipe_ready,"wakeup_tx")<0)  return(-1);
   }
 
+#if defined(PRE_SCD_THREAD)
+    if (nfapi_mode == 2){
+      new_dlsch_ue_select_tbl_in_use = dlsch_ue_select_tbl_in_use;
+      dlsch_ue_select_tbl_in_use = !dlsch_ue_select_tbl_in_use;
+      memcpy(&pre_scd_eNB_UE_stats,&RC.mac[ru->eNB_list[0]->Mod_id]->UE_list.eNB_UE_stats, sizeof(eNB_UE_STATS)*MAX_NUM_CCs*NUMBER_OF_UE_MAX);
+      memcpy(&pre_scd_activeUE, &RC.mac[ru->eNB_list[0]->Mod_id]->UE_list.active, sizeof(boolean_t)*NUMBER_OF_UE_MAX);
+      if (pthread_mutex_lock(&ru->proc.mutex_pre_scd)!= 0) {
+          LOG_E( PHY, "[eNB] error locking proc mutex for eNB pre scd\n");
+          exit_fun("error locking mutex_time");
+      }
+
+      ru->proc.instance_pre_scd++;
+
+      if (ru->proc.instance_pre_scd == 0) {
+          if (pthread_cond_signal(&ru->proc.cond_pre_scd) != 0) {
+              LOG_E( PHY, "[eNB] ERROR pthread_cond_signal for eNB pre scd\n" );
+              exit_fun( "ERROR pthread_cond_signal cond_pre_scd" );
+          }
+      }else{
+          LOG_E( PHY, "[eNB] frame %d subframe %d rxtx busy instance_pre_scd %d\n",
+                 proc->frame_rx,proc->subframe_rx,ru->proc.instance_pre_scd );
+      }
+
+      if (pthread_mutex_unlock(&ru->proc.mutex_pre_scd)!= 0) {
+          LOG_E( PHY, "[eNB] error unlocking mutex_pre_scd mutex for eNB pre scd\n");
+          exit_fun("error unlocking mutex_pre_scd");
+      }
+    }
+#endif
+
   pthread_mutex_lock(&eNB->UL_INFO_mutex);
 
   eNB->UL_INFO.frame     = proc->frame_rx;
diff --git a/targets/RT/USER/lte-ru.c b/targets/RT/USER/lte-ru.c
old mode 100644
new mode 100755
index 7002bc4ebd..750d8239da
--- a/targets/RT/USER/lte-ru.c
+++ b/targets/RT/USER/lte-ru.c
@@ -120,6 +120,7 @@ extern volatile int                    oai_exit;
 extern int emulate_rf;
 extern int numerology;
 extern clock_source_t clock_source;
+extern uint8_t dlsch_ue_select_tbl_in_use;
 
 extern PARALLEL_CONF_t get_thread_parallel_conf(void);
 extern WORKER_CONF_t   get_thread_worker_conf(void);
@@ -142,6 +143,11 @@ int connect_rau(RU_t *ru);
 
 extern uint16_t sf_ahead;
 
+#if defined(PRE_SCD_THREAD)
+void init_ru_vnf(void);
+#endif
+
+
 /*************************************************************/
 /* Functions to attach and configure RRU                     */
 
@@ -2798,6 +2804,114 @@ void stop_RU(int nb_ru)
   }
 }
 
+//Some of the member of ru pointer is used in pre_scd.
+//This funtion is for initializing ru pointer for L2 FAPI simulator.
+#if defined(PRE_SCD_THREAD)
+void init_ru_vnf(void) {
+  
+  int ru_id;
+  RU_t *ru;
+  RU_proc_t *proc;
+//  PHY_VARS_eNB *eNB0= (PHY_VARS_eNB *)NULL;
+  int i;
+  int CC_id;
+
+
+  dlsch_ue_select_tbl_in_use = 1;
+
+
+  // create status mask
+  RC.ru_mask = 0;
+  pthread_mutex_init(&RC.ru_mutex,NULL);
+  pthread_cond_init(&RC.ru_cond,NULL);
+
+  // read in configuration file)
+  printf("configuring RU from file\n");
+  RCconfig_RU();
+  LOG_I(PHY,"number of L1 instances %d, number of RU %d, number of CPU cores %d\n",RC.nb_L1_inst,RC.nb_RU,get_nprocs());
+
+  if (RC.nb_CC != 0)
+    for (i=0;i<RC.nb_L1_inst;i++) 
+      for (CC_id=0;CC_id<RC.nb_CC[i];CC_id++) RC.eNB[i][CC_id]->num_RU=0;
+
+  LOG_D(PHY,"Process RUs RC.nb_RU:%d\n",RC.nb_RU);
+  for (ru_id=0;ru_id<RC.nb_RU;ru_id++) {
+    LOG_D(PHY,"Process RC.ru[%d]\n",ru_id);
+    ru               = RC.ru[ru_id];
+//    ru->rf_config_file = rf_config_file;
+    ru->idx          = ru_id;              
+    ru->ts_offset    = 0;
+    // use eNB_list[0] as a reference for RU frame parameters
+    // NOTE: multiple CC_id are not handled here yet!
+
+    if (ru->num_eNB > 0) {
+//      LOG_D(PHY, "%s() RC.ru[%d].num_eNB:%d ru->eNB_list[0]:%p RC.eNB[0][0]:%p rf_config_file:%s\n", __FUNCTION__, ru_id, ru->num_eNB, ru->eNB_list[0], RC.eNB[0][0], ru->rf_config_file);
+
+      if (ru->eNB_list[0] == 0)
+      {
+        LOG_E(PHY,"%s() DJP - ru->eNB_list ru->num_eNB are not initialized - so do it manually\n", __FUNCTION__);
+        ru->eNB_list[0] = RC.eNB[0][0];
+        ru->num_eNB=1;
+      //
+      // DJP - feptx_prec() / feptx_ofdm() parses the eNB_list (based on num_eNB) and copies the txdata_F to txdata in RU
+      //
+      }
+      else
+      {
+        LOG_E(PHY,"DJP - delete code above this %s:%d\n", __FILE__, __LINE__);
+      }
+    }
+
+// frame_parms is not used in L2 FAPI simulator
+/*
+    eNB0             = ru->eNB_list[0];
+    LOG_D(PHY, "RU FUnction:%d ru->if_south:%d\n", ru->function, ru->if_south);
+    LOG_D(PHY, "eNB0:%p\n", eNB0);
+    if (eNB0)
+    {
+      if ((ru->function != NGFI_RRU_IF5) && (ru->function != NGFI_RRU_IF4p5))
+        AssertFatal(eNB0!=NULL,"eNB0 is null!\n");
+
+      if (eNB0) {
+        LOG_I(PHY,"Copying frame parms from eNB %d to ru %d\n",eNB0->Mod_id,ru->idx);
+        memcpy((void*)&ru->frame_parms,(void*)&eNB0->frame_parms,sizeof(LTE_DL_FRAME_PARMS));
+
+        // attach all RU to all eNBs in its list/
+        LOG_D(PHY,"ru->num_eNB:%d eNB0->num_RU:%d\n", ru->num_eNB, eNB0->num_RU);
+        for (i=0;i<ru->num_eNB;i++) {
+          eNB0 = ru->eNB_list[i];
+          eNB0->RU_list[eNB0->num_RU++] = ru;
+        }
+      }
+    }
+*/
+    LOG_I(PHY,"Initializing RRU descriptor %d : (%s,%s,%d)\n",ru_id,ru_if_types[ru->if_south],eNB_timing[ru->if_timing],ru->function);
+
+//    set_function_spec_param(ru);
+    LOG_I(PHY,"Starting ru_thread %d\n",ru_id);
+
+//    init_RU_proc(ru);
+  
+    proc = &ru->proc;
+    memset((void*)proc,0,sizeof(RU_proc_t));
+
+    proc->instance_pre_scd = -1;
+    pthread_mutex_init( &proc->mutex_pre_scd, NULL);
+    pthread_cond_init( &proc->cond_pre_scd, NULL);
+    pthread_create(&proc->pthread_pre_scd, NULL, pre_scd_thread, (void*)ru);
+    pthread_setname_np(proc->pthread_pre_scd, "pre_scd_thread");
+
+  } // for ru_id
+  
+
+
+  //  sleep(1);
+  LOG_D(HW,"[lte-softmodem.c] RU threads created\n");
+  
+
+}
+#endif
+
 
 /* --------------------------------------------------------*/
 /* from here function to use configuration module          */
diff --git a/targets/RT/USER/lte-softmodem.c b/targets/RT/USER/lte-softmodem.c
old mode 100644
new mode 100755
index 03a461454f..101f8fa0a8
--- a/targets/RT/USER/lte-softmodem.c
+++ b/targets/RT/USER/lte-softmodem.c
@@ -1063,6 +1063,13 @@ int main( int argc, char **argv )
       }
     }
 
+
+#if defined(PRE_SCD_THREAD)
+    if (nfapi_mode==2) { // ru pointer is necessary for pre_scd.
+      init_ru_vnf();
+    }
+#endif
+
     config_sync_var=0;
 
     if (nfapi_mode==1) { // PNF
diff --git a/targets/RT/USER/lte-softmodem.h b/targets/RT/USER/lte-softmodem.h
old mode 100644
new mode 100755
index 96ab799c3d..bd71e0877f
--- a/targets/RT/USER/lte-softmodem.h
+++ b/targets/RT/USER/lte-softmodem.h
@@ -255,6 +255,7 @@ extern void kill_eNB_proc(int inst);
 // In lte-ru.c
 extern void init_RU(const char*);
 extern void stop_ru(RU_t *ru);
+extern void init_ru_vnf(void);
 extern void init_RU_proc(RU_t *ru);
 extern void stop_RU(int nb_ru);
 extern void kill_RU_proc(RU_t *ru);