diff --git a/cmake_targets/CMakeLists.txt b/cmake_targets/CMakeLists.txt
index 01c44e8ea7..bd16f3efba 100644
--- a/cmake_targets/CMakeLists.txt
+++ b/cmake_targets/CMakeLists.txt
@@ -244,6 +244,7 @@ add_boolean_option(TEST_OMG            False "???")
 add_boolean_option(DEBUG_OMG           False "???")
 add_boolean_option(PRINT_STATS         False "This adds the possibility to see the status")
 add_boolean_option(T_TRACER            True  "Activate the T tracer, a debugging/monitoring framework" )
+add_boolean_option(ENABLE_VCD          True  "always true now, time measurements of proc calls and var displays")
 add_boolean_option(UE_AUTOTEST_TRACE   False "Activate UE autotest specific logs")
 add_boolean_option(UE_DEBUG_TRACE      False "Activate UE debug trace")
 add_boolean_option(UE_TIMING_TRACE     False "Activate UE timing trace")
@@ -1032,7 +1033,7 @@ set(UTIL_SRC
   ${OPENAIR2_DIR}/UTIL/LISTS/list.c
   ${OPENAIR2_DIR}/UTIL/LISTS/list2.c
   ${OPENAIR_DIR}/common/utils/LOG/log.c
-#  ${OPENAIR2_DIR}/UTIL/LOG/vcd_signal_dumper.c
+  ${OPENAIR_DIR}/common/utils/LOG/vcd_signal_dumper.c
   ${OPENAIR2_DIR}/UTIL/MATH/oml.c
 #  ${OPENAIR2_DIR}/UTIL/MEM/mem_block.c
 #  ${OPENAIR2_DIR}/UTIL/OCG/OCG.c
@@ -2533,6 +2534,7 @@ add_executable(nr-uesoftmodem
   ${OPENAIR_DIR}/common/utils/system.c
   ${XFORMS_SOURCE_NR}
   ${T_SOURCE}
+  ${UTIL_SRC}
   ${CONFIG_SOURCES}
   ${SHLIB_LOADER_SOURCES}
   )
@@ -2644,42 +2646,51 @@ add_executable(nr_dlschsim
   ${OPENAIR1_DIR}/SIMULATION/NR_PHY/dlschsim.c 
   ${OPENAIR_DIR}/common/utils/backtrace.c
   ${OPENAIR_DIR}/common/utils/system.c
+  ${UTIL_SRC}
   ${T_SOURCE})
-target_link_libraries(nr_dlschsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+target_link_libraries(nr_dlschsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} ${ITTI_LIB} dl)
 
 add_executable(nr_pbchsim  
   ${OPENAIR1_DIR}/SIMULATION/NR_PHY/pbchsim.c 
   ${OPENAIR_DIR}/common/utils/backtrace.c
   ${OPENAIR_DIR}/common/utils/system.c
+  ${UTIL_SRC}
   ${T_SOURCE})
-target_link_libraries(nr_pbchsim  -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+target_link_libraries(nr_pbchsim  -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} ${ITTI_LIB}  dl)
 
 #PUCCH ---> Prashanth
 add_executable(nr_pucchsim  
   ${OPENAIR1_DIR}/SIMULATION/NR_PHY/pucchsim.c 
   ${OPENAIR_DIR}/common/utils/backtrace.c
+  ${OPENAIR_DIR}/common/utils/system.c
+  ${UTIL_SRC}
   ${T_SOURCE})
-target_link_libraries(nr_pucchsim  -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+target_link_libraries(nr_pucchsim  -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} ${ITTI_LIB} dl)
 #PUCCH ---> Prashanth
 
 add_executable(nr_dlsim
   ${OPENAIR1_DIR}/SIMULATION/NR_PHY/dlsim.c 
   ${OPENAIR_DIR}/common/utils/backtrace.c
   ${OPENAIR_DIR}/common/utils/system.c
+  ${UTIL_SRC}
   ${T_SOURCE})   
-target_link_libraries(nr_dlsim  -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB SCHED_NR_UE_LIB MAC_NR MAC_UE_NR MAC_NR_COMMON RRC_LIB NR_RRC_LIB CONFIG_LIB L2_NR -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+target_link_libraries(nr_dlsim  -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB SCHED_NR_UE_LIB MAC_NR MAC_UE_NR MAC_NR_COMMON RRC_LIB NR_RRC_LIB CONFIG_LIB L2_NR -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} ${ITTI_LIB} dl)
 
 add_executable(nr_ulschsim
   ${OPENAIR1_DIR}/SIMULATION/NR_PHY/ulschsim.c
   ${OPENAIR_DIR}/common/utils/backtrace.c
+  ${OPENAIR_DIR}/common/utils/system.c
+  ${UTIL_SRC}
   ${T_SOURCE})
-target_link_libraries(nr_ulschsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+target_link_libraries(nr_ulschsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB CONFIG_LIB MAC_NR_COMMON -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} ${ITTI_LIB} dl)
 
 add_executable(nr_ulsim
   ${OPENAIR1_DIR}/SIMULATION/NR_PHY/ulsim.c
   ${OPENAIR_DIR}/common/utils/backtrace.c
+  ${OPENAIR_DIR}/common/utils/system.c
+  ${UTIL_SRC}
   ${T_SOURCE})
-target_link_libraries(nr_ulsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB SCHED_NR_UE_LIB MAC_NR MAC_UE_NR MAC_NR_COMMON RRC_LIB NR_RRC_LIB CONFIG_LIB L2_NR -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} dl)
+target_link_libraries(nr_ulsim -Wl,--start-group UTIL SIMU PHY_COMMON PHY_NR PHY_NR_UE SCHED_NR_LIB SCHED_NR_UE_LIB MAC_NR MAC_UE_NR MAC_NR_COMMON RRC_LIB NR_RRC_LIB CONFIG_LIB L2_NR -Wl,--end-group m pthread ${ATLAS_LIBRARIES} ${T_LIB} ${ITTI_LIB} dl)
 
 
 foreach(myExe dlsim dlsim_tm7 ulsim pbchsim scansim mbmssim pdcchsim pucchsim prachsim syncsim)
diff --git a/common/utils/LOG/vcd_signal_dumper.c b/common/utils/LOG/vcd_signal_dumper.c
index 1d80670324..d25b78be04 100644
--- a/common/utils/LOG/vcd_signal_dumper.c
+++ b/common/utils/LOG/vcd_signal_dumper.c
@@ -343,6 +343,7 @@ const char* eurecomFunctionsNames[] = {
   "phy_procedures_ue_tx",
   "phy_procedures_ue_rx",
   "phy_procedures_ue_tx_ulsch_uespec",
+  "phy_procedures_nr_ue_tx_ulsch_uespec",
   "phy_procedures_ue_tx_pucch",
   "phy_procedures_ue_tx_ulsch_common",
   "phy_procedures_ue_tx_prach",
@@ -366,6 +367,11 @@ const char* eurecomFunctionsNames[] = {
   "dlsch_decoding5",
   "dlsch_decoding6",
   "dlsch_decoding7",
+  "dlsch_segmentation",
+  "dlsch_deinterleaving",
+  "dlsch_rate_matching",
+  "dlsch_ldpc",
+  "dlsch_compine_seg",
   "dlsch_pmch_decoding",
   "rx_pdcch",
   "dci_decoding",
diff --git a/common/utils/LOG/vcd_signal_dumper.h b/common/utils/LOG/vcd_signal_dumper.h
index 33af6cbeef..a7c4c10fe3 100644
--- a/common/utils/LOG/vcd_signal_dumper.h
+++ b/common/utils/LOG/vcd_signal_dumper.h
@@ -324,6 +324,7 @@ typedef enum {
   VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_TX,
   VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_RX,
   VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_TX_ULSCH_UESPEC,
+  VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_NR_UE_TX_ULSCH_UESPEC,
   VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_TX_PUCCH,
   VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_TX_ULSCH_COMMON,
   VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_TX_PRACH,
@@ -347,6 +348,11 @@ typedef enum {
   VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DECODING5,
   VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DECODING6,
   VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DECODING7,
+  VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_SEGMENTATION,
+  VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DEINTERLEAVING,
+  VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_RATE_MATCHING,
+  VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_LDPC,
+  VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_COMBINE_SEG,
   VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_PMCH_DECODING,
   VCD_SIGNAL_DUMPER_FUNCTIONS_RX_PDCCH,
   VCD_SIGNAL_DUMPER_FUNCTIONS_DCI_DECODING,
@@ -549,12 +555,20 @@ extern int ouput_vcd;
 
 #include "T.h"
 
+#define VCD_SIGNAL_DUMPER_INIT(x)         /* nothing */
+#define VCD_SIGNAL_DUMPER_CLOSE()         /* nothing */
+#define VCD_SIGNAL_DUMPER_CREATE_HEADER() /* nothing */
 #define VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(var, val) T_VCD_VARIABLE(var, val)
 #define VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(var, val) T_VCD_FUNCTION(var, val)
-#else
 
-#define VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(var, val)
-#define VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(var, val)
+#else /* T_TRACER */
+
+#define VCD_SIGNAL_DUMPER_INIT(aRgUmEnT)                   vcd_signal_dumper_init(aRgUmEnT)
+#define VCD_SIGNAL_DUMPER_CLOSE()                          vcd_signal_dumper_close()
+#define VCD_SIGNAL_DUMPER_CREATE_HEADER()                  vcd_signal_dumper_create_header()
+#define VCD_SIGNAL_DUMPER_DUMP_VARIABLE_BY_NAME(vAr1,vAr2) vcd_signal_dumper_dump_variable_by_name(vAr1,vAr2)
+#define VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(vAr1,vAr2) vcd_signal_dumper_dump_function_by_name(vAr1,vAr2)
+
  
 #endif /* T_TRACER */
 
diff --git a/common/utils/T/T_defs.h b/common/utils/T/T_defs.h
index 7d55d9b336..4f2b10c3ae 100644
--- a/common/utils/T/T_defs.h
+++ b/common/utils/T/T_defs.h
@@ -73,7 +73,7 @@ typedef struct {
 } T_cache_t;
 
 /* number of VCD functions (to be kept up to date! see in T_messages.txt) */
-#define VCD_NUM_FUNCTIONS (231)
+#define VCD_NUM_FUNCTIONS (237)//(232)
 
 /* number of VCD variables (to be kept up to date! see in T_messages.txt) */
 #define VCD_NUM_VARIABLES (185)
diff --git a/common/utils/T/T_messages.txt b/common/utils/T/T_messages.txt
index 5af1f1232f..0b10b6e25e 100644
--- a/common/utils/T/T_messages.txt
+++ b/common/utils/T/T_messages.txt
@@ -2493,6 +2493,11 @@ ID = VCD_FUNCTION_PHY_PROCEDURES_UE_TX_ULSCH_UESPEC
     GROUP = ALL:VCD:UE:VCD_FUNCTION
     FORMAT = int,value
     VCD_NAME = phy_procedures_ue_tx_ulsch_uespec
+ID = VCD_FUNCTION_PHY_PROCEDURES_NR_UE_TX_ULSCH_UESPEC
+    DESC = VCD function PHY_PROCEDURES_NR_UE_TX_ULSCH_UESPEC
+    GROUP = ALL:VCD:UE:VCD_FUNCTION
+    FORMAT = int,value
+    VCD_NAME = phy_procedures_nr_ue_tx_ulsch_uespec
 ID = VCD_FUNCTION_PHY_PROCEDURES_UE_TX_PUCCH
     DESC = VCD function PHY_PROCEDURES_UE_TX_PUCCH
     GROUP = ALL:VCD:UE:VCD_FUNCTION
@@ -2608,6 +2613,31 @@ ID = VCD_FUNCTION_DLSCH_DECODING7
     GROUP = ALL:VCD:ENB:VCD_FUNCTION
     FORMAT = int,value
     VCD_NAME = dlsch_decoding7
+ID = VCD_FUNCTION_DLSCH_SEGMENTATION
+    DESC = VCD function DLSCH_SEGMENTATION
+    GROUP = ALL:VCD:ENB:VCD_FUNCTION
+    FORMAT = int,value
+    VCD_NAME = dlsch_segmentation
+ID = VCD_FUNCTION_DLSCH_DEINTERLEAVING
+    DESC = VCD function DLSCH_DEINTERLEAVING
+    GROUP = ALL:VCD:ENB:VCD_FUNCTION
+    FORMAT = int,value
+    VCD_NAME = dlsch_deinterleaving
+ID = VCD_FUNCTION_DLSCH_RATE_MATCHING
+    DESC = VCD function DLSCH_RATE_MATCHING
+    GROUP = ALL:VCD:ENB:VCD_FUNCTION
+    FORMAT = int,value
+    VCD_NAME = dlsch_rate_matching
+ID = VCD_FUNCTION_DLSCH_LDPC
+    DESC = VCD function DLSCH_LDPC
+    GROUP = ALL:VCD:ENB:VCD_FUNCTION
+    FORMAT = int,value
+    VCD_NAME = dlsch_ldpc
+ID = VCD_FUNCTION_DLSCH_COMBINE_SEG
+    DESC = VCD function DLSCH_COMBINE_SEG
+    GROUP = ALL:VCD:ENB:VCD_FUNCTION
+    FORMAT = int,value
+    VCD_NAME = dlsch_compine_seg
 ID = VCD_FUNCTION_DLSCH_PMCH_DECODING
     DESC = VCD function DLSCH_PMCH_DECODING
     GROUP = ALL:VCD:ENB:VCD_FUNCTION
diff --git a/executables/nr-uesoftmodem.c b/executables/nr-uesoftmodem.c
index 8a002d439c..0dbe3ae831 100644
--- a/executables/nr-uesoftmodem.c
+++ b/executables/nr-uesoftmodem.c
@@ -120,6 +120,7 @@ int                      threequarter_fs=0;
 uint32_t                 downlink_frequency[MAX_NUM_CCs][4];
 int32_t                  uplink_frequency_offset[MAX_NUM_CCs][4];
 
+
 extern int16_t nr_dlsch_demod_shift;
 
 int UE_scan = 0;
@@ -397,7 +398,7 @@ int16_t dlsch_demod_shift;
 
 static void get_options(void) {
   int CC_id;
-  int tddflag=0, nonbiotflag;
+  int tddflag=0, nonbiotflag, vcdflag=0;
   char *loopfile=NULL;
   int dumpframe=0;
   uint32_t online_log_messages;
@@ -466,6 +467,9 @@ static void get_options(void) {
       frame_parms[CC_id]->frame_type = TDD;
   }
 
+  if (vcdflag > 0)
+    ouput_vcd = 1;
+
   /*if (frame_parms[0]->N_RB_DL !=0) {
       if ( frame_parms[0]->N_RB_DL < 6 ) {
        frame_parms[0]->N_RB_DL = 6;
@@ -703,6 +707,10 @@ int main( int argc, char **argv ) {
       LOG_E(OPT,"failed to run OPT \n");
   }
 
+  if (ouput_vcd) {
+    vcd_signal_dumper_init("/tmp/openair_dump_nrUE.vcd");
+  }
+
 #ifdef PDCP_USE_NETLINK
   netlink_init();
 #if defined(PDCP_USE_NETLINK_QUEUES)
@@ -796,5 +804,8 @@ int main( int argc, char **argv ) {
   while(true)
     sleep(3600);
 
+  if (ouput_vcd)
+    vcd_signal_dumper_close();
+
   return 0;
 }
diff --git a/executables/nr-uesoftmodem.h b/executables/nr-uesoftmodem.h
index ddac4fe9bc..3edffc30e1 100644
--- a/executables/nr-uesoftmodem.h
+++ b/executables/nr-uesoftmodem.h
@@ -79,6 +79,7 @@
     {"q" ,                      CONFIG_HLP_STMON,       PARAMFLAG_BOOL,         iptr:&opp_enabled,                     defintval:0,                    TYPE_INT,       0},                     \
     {"S" ,                      CONFIG_HLP_MSLOTS,      PARAMFLAG_BOOL,         u8ptr:&exit_missed_slots,              defintval:1,                    TYPE_UINT8,     0},                     \
     {"T" ,                      CONFIG_HLP_TDD,         PARAMFLAG_BOOL,         iptr:&tddflag,                         defintval:0,                    TYPE_INT,       0},                     \
+    {"V" ,                      CONFIG_HLP_VCD,         PARAMFLAG_BOOL,         iptr:&vcdflag,                         defintval:0,                    TYPE_INT,       0},                     \
     {"numerology" ,             CONFIG_HLP_NUMEROLOGY,  PARAMFLAG_BOOL,         iptr:&numerology,                      defintval:0,                    TYPE_INT,       0},                     \
     {"emulate-rf" ,             CONFIG_HLP_EMULATE_RF,  PARAMFLAG_BOOL,         iptr:&emulate_rf,                      defintval:0,                    TYPE_INT,       0},                     \
     {"parallel-config",         CONFIG_HLP_PARALLEL_CMD,0,                      strptr:(char **)&parallel_config,      defstrval:NULL,                 TYPE_STRING,    0},                     \
diff --git a/openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c b/openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c
index 8f6806141f..e9a147dce1 100644
--- a/openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c
+++ b/openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c
@@ -30,6 +30,7 @@
 * \warning
 */
 
+#include "common/utils/LOG/vcd_signal_dumper.h"
 #include "PHY/defs_nr_UE.h"
 #include "PHY/phy_extern_nr_ue.h"
 #include "PHY/CODING/coding_extern.h"
@@ -307,6 +308,8 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
 
   LOG_I(PHY,"DLSCH Decoding, harq_pid %d TBS %d G %d mcs %d Nl %d nb_symb_sch %d nb_rb %d\n",harq_pid,A,G, harq_process->mcs, harq_process->Nl, nb_symb_sch,nb_rb);
 
+  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_SEGMENTATION, VCD_FUNCTION_IN);
+
   if (harq_process->round == 0) {
     // This is a new packet, so compute quantities regarding segmentation
     harq_process->B = A+24;
@@ -324,6 +327,8 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
 #endif
   }
 
+  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_SEGMENTATION, VCD_FUNCTION_OUT);
+
   p_decParams->Z = harq_process->Z;
   //printf("dlsch decoding nr segmentation Z %d\n", p_decParams->Z);
 
@@ -406,11 +411,16 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
 #if UE_TIMING_TRACE
     start_meas(dlsch_deinterleaving_stats);
 #endif
+
+    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DEINTERLEAVING, VCD_FUNCTION_IN);
+
     nr_deinterleaving_ldpc(E,
                            harq_process->Qm,
                            harq_process->w[r], // [hna] w is e
                            dlsch_llr+r_offset);
 
+    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DEINTERLEAVING, VCD_FUNCTION_OUT);
+
     //for (int i =0; i<16; i++)
     //          printf("rx output deinterleaving w[%d]= %d r_offset %d\n", i,harq_process->w[r][i], r_offset);
 
@@ -434,6 +444,8 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
           harq_process->round);
 #endif
 
+    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_RATE_MATCHING, VCD_FUNCTION_IN);
+
     if (nr_rate_matching_ldpc_rx(Ilbrm,
                                  Tbslbrm,
                                  p_decParams->BG,
@@ -444,12 +456,15 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
                                  harq_process->rvidx,
                                  (harq_process->round==0)?1:0,
                                  E)==-1) {
+    vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_RATE_MATCHING, VCD_FUNCTION_OUT);
 #if UE_TIMING_TRACE
       stop_meas(dlsch_rate_unmatching_stats);
 #endif
       LOG_E(PHY,"dlsch_decoding.c: Problem in rate_matching\n");
       return(dlsch->max_ldpc_iterations + 1);
     } else {
+
+      vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_RATE_MATCHING, VCD_FUNCTION_OUT);
 #if UE_TIMING_TRACE
       stop_meas(dlsch_rate_unmatching_stats);
 #endif
@@ -515,12 +530,16 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
         pl[j] = _mm_packs_epi16(pv[i],pv[i+1]);
       }
 
+      vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_LDPC, VCD_FUNCTION_IN);
+
       no_iteration_ldpc = nrLDPC_decoder(p_decParams,
                            (int8_t*)&pl[0],
                            llrProcBuf,
                            p_nrLDPC_procBuf[r],
                            p_procTime);
 
+      vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_LDPC, VCD_FUNCTION_OUT);
+
       // Fixme: correct type is unsigned, but nrLDPC_decoder and all called behind use signed int
       if (check_crc((uint8_t*)llrProcBuf,length_dec,harq_process->F,crc_type)) {
         printf("\x1B[34m" "Segment %d CRC OK\n",r);
@@ -642,6 +661,9 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
   printf("F %d, Fbytes %d\n",harq_process->F,harq_process->F>>3);
   printf("C %d\n",harq_process->C);
   */
+
+  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_COMBINE_SEG, VCD_FUNCTION_IN);
+
   for (r=0; r<harq_process->C; r++) {
 
     memcpy(harq_process->b+offset,
@@ -661,6 +683,8 @@ uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
 
   }
 
+  vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_COMBINE_SEG, VCD_FUNCTION_OUT);
+
   dlsch->last_iteration_cnt = ret;
 
   return(ret);
diff --git a/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c b/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
index fcfa394d79..2b59f93160 100644
--- a/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
+++ b/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
@@ -36,6 +36,7 @@
 #include "PHY/MODULATION/nr_modulation.h"
 #include "PHY/MODULATION/modulation_common.h"
 #include "common/utils/assertions.h"
+#include "common/utils/LOG/vcd_signal_dumper.h"
 #include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
 #include "PHY/NR_TRANSPORT/nr_sch_dmrs.h"
 #include "PHY/defs_nr_common.h"
diff --git a/openair1/SIMULATION/NR_PHY/dlschsim.c b/openair1/SIMULATION/NR_PHY/dlschsim.c
index 09ef2ff3f3..2a6d6d04ad 100644
--- a/openair1/SIMULATION/NR_PHY/dlschsim.c
+++ b/openair1/SIMULATION/NR_PHY/dlschsim.c
@@ -28,6 +28,8 @@
 #include "common/ran_context.h"
 #include "common/config/config_userapi.h"
 #include "common/utils/LOG/log.h"
+#include "common/utils/LOG/vcd_signal_dumper.h"
+#include "T.h"
 #include "PHY/defs_gNB.h"
 #include "PHY/defs_nr_common.h"
 #include "PHY/defs_nr_UE.h"
@@ -115,7 +117,7 @@ int main(int argc, char **argv)
 	//logInit();
 	randominit(0);
 
-	while ((c = getopt(argc, argv, "df:hpg:i:j:n:l:m:r:s:S:y:z:M:N:F:R:P:L:")) != -1) {
+	while ((c = getopt(argc, argv, "df:hpVg:i:j:n:l:m:r:s:S:y:z:M:N:F:R:P:L:")) != -1) {
 		switch (c) {
 		/*case 'f':
 			write_output_file = 1;
@@ -188,6 +190,10 @@ int main(int argc, char **argv)
 #endif
 			break;
 
+		case 'V':
+		  ouput_vcd = 1;
+		  break;
+
 		case 'S':
 			snr1 = atof(optarg);
 			snr1set = 1;
@@ -286,6 +292,7 @@ int main(int argc, char **argv)
 			printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n", argv[0]);
 			printf("-h This message\n");
 			printf("-p Use extended prefix mode\n");
+			printf("-V Enable VCD dumb functions\n");
 			//printf("-d Use TDD\n");
 			printf("-n Number of frames to simulate\n");
 			printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB.  If n_frames is 1 then just SNR is simulated\n");
@@ -317,6 +324,9 @@ int main(int argc, char **argv)
 	if (snr1set == 0)
 		snr1 = snr0 + 10;
 
+	if (ouput_vcd)
+        vcd_signal_dumper_init("/tmp/openair_dump_nr_dlschsim.vcd");
+
 	gNB2UE = new_channel_desc_scm(n_tx, n_rx, channel_model, 
 				      61.44e6, //N_RB2sampling_rate(N_RB_DL),
 				      40e6, //N_RB2channel_bandwidth(N_RB_DL),
@@ -525,10 +535,15 @@ int main(int argc, char **argv)
 			printf("\n");
 			exit(-1);
 #endif
+
+			vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DECODING0, VCD_FUNCTION_IN);
+
 			ret = nr_dlsch_decoding(UE, channel_output_fixed, &UE->frame_parms,
 					dlsch0_ue, dlsch0_ue->harq_processes[0], frame, nb_symb_sch,
 					slot,harq_pid, is_crnti, llr8_flag);
 
+			vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DECODING0, VCD_FUNCTION_OUT);
+
 			if (ret > dlsch0_ue->max_ldpc_iterations)
 				n_errors++;
 
@@ -622,6 +637,9 @@ int main(int argc, char **argv)
 	if (input_fd)
 		fclose(input_fd);
 
+	if (ouput_vcd)
+        vcd_signal_dumper_close();
+
 	return (n_errors);
 }