diff --git a/common/utils/itti/intertask_interface_types.h b/common/utils/itti/intertask_interface_types.h
index 929c3ecc21044b0552ff02c0c7a551003905e61b..43abf485eb2143a8e7a10bf40511cf7bfe9182fd 100644
--- a/common/utils/itti/intertask_interface_types.h
+++ b/common/utils/itti/intertask_interface_types.h
@@ -117,10 +117,10 @@ typedef union msg_s
 #undef MESSAGE_DEF
 } msg_t;
 
-#define INSTANCE_DEFAULT    0
-#define INSTANCE_ALL        -1
+#define INSTANCE_DEFAULT    (UINT16_MAX - 1)
+#define INSTANCE_ALL        (UINT16_MAX)
 
-typedef int16_t instance_t;
+typedef uint16_t instance_t;
 typedef uint16_t MessageHeaderSize;
 
 typedef struct itti_lte_time_s
diff --git a/common/utils/itti_analyzer/common/itti_types.h b/common/utils/itti_analyzer/common/itti_types.h
index acacbb2cada5da937a243fa5ac8ae25d68738814..e360414c4875e8f36896fffe80d4f2fe79be038e 100644
--- a/common/utils/itti_analyzer/common/itti_types.h
+++ b/common/utils/itti_analyzer/common/itti_types.h
@@ -53,4 +53,10 @@ typedef struct {
     char     signal_name[SIGNAL_NAME_LENGTH];
 } itti_signal_header_t;
 
+
+#define INSTANCE_DEFAULT    (UINT16_MAX - 1)
+#define INSTANCE_ALL        (UINT16_MAX)
+
+typedef uint16_t instance_t;
+
 #endif
diff --git a/common/utils/itti_analyzer/libui/ui_callbacks.c b/common/utils/itti_analyzer/libui/ui_callbacks.c
index 99a178099e03f64d964f57673826a21ec93ebfec..34897f259ea26040a430cd0f4c2f7bd498fdb926 100644
--- a/common/utils/itti_analyzer/libui/ui_callbacks.c
+++ b/common/utils/itti_analyzer/libui/ui_callbacks.c
@@ -79,20 +79,6 @@ gboolean ui_callback_on_filters_enabled(GtkToolButton *button, gpointer data)
             gtk_tool_item_set_tooltip_text (GTK_TOOL_ITEM(button), "Enable messages filtering");
         }
         ui_tree_view_refilter ();
-
-        if (ui_main_data.messages_list != NULL)
-        {
-            GtkTreePath *path_row;
-
-            /* Get the currently selected message */
-            gtk_tree_view_get_cursor (GTK_TREE_VIEW(ui_main_data.messages_list), &path_row, NULL);
-            if (path_row != NULL)
-            {
-                /* Center the message in the middle of the list if possible */
-                gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW(ui_main_data.messages_list), path_row, NULL, TRUE, 0.5,
-                                              0.0);
-            }
-        }
     }
 
     return TRUE;
@@ -171,7 +157,7 @@ gboolean ui_callback_on_select_signal(GtkTreeSelection *selection, GtkTreeModel
             char label[100];
 
             gtk_tree_model_get (model, &iter, COL_MSG_NUM, &message_number, COL_MESSAGE_ID, &message_id,
-                                COL_FROM_TASK_ID, &origin_task_id, COL_TO_TASK_ID, &destination_task_id, COL_INSTANCE,
+                                COL_FROM_TASK_ID, &origin_task_id, COL_TO_TASK_ID, &destination_task_id, COL_INSTANCE_ID,
                                 &instance, COL_BUFFER, &buffer, -1);
 
             g_debug("  Get iter %p %p", buffer_current, buffer);
diff --git a/common/utils/itti_analyzer/libui/ui_filters.c b/common/utils/itti_analyzer/libui/ui_filters.c
index 79537a78b05be9b67a0cd5e32ebf59ca8c393846..99a04ec7c54559d6fe4fad14ec94ce8d09443c3c 100644
--- a/common/utils/itti_analyzer/libui/ui_filters.c
+++ b/common/utils/itti_analyzer/libui/ui_filters.c
@@ -110,7 +110,7 @@ int ui_filters_search_id(ui_filter_t *filter, uint32_t value)
         }
     }
 
-    return (item);
+    return (-1);
 }
 
 static void ui_filter_set_enabled(uint8_t *enabled, ui_entry_enabled_e entry_enabled, gboolean new)
@@ -214,7 +214,7 @@ static gboolean ui_item_enabled(ui_filter_t *filter, const uint32_t value)
     {
         item = ui_filters_search_id (filter, value);
 
-        if (item < filter->used)
+        if (item >= 0)
         {
             return (filter->items[item].enabled ? TRUE : FALSE);
         }
diff --git a/common/utils/itti_analyzer/libui/ui_notifications.c b/common/utils/itti_analyzer/libui/ui_notifications.c
index 675b1c385d126a459522036273b6cb147bd98504..a63b9a4f0b0353f7bcd9aa2293d1e538ebb42273 100644
--- a/common/utils/itti_analyzer/libui/ui_notifications.c
+++ b/common/utils/itti_analyzer/libui/ui_notifications.c
@@ -9,6 +9,7 @@
 
 #include <gtk/gtk.h>
 
+#include "logs.h"
 #include "itti_types.h"
 #include "rc.h"
 
@@ -196,6 +197,7 @@ int ui_messages_read(char *filename)
                             read_data = 0;
                         }
                         ui_gtk_flush_events ();
+                        g_message("Parsed XML definition from file \"%s\"", filename);
                         break;
 
                     case ITTI_STATISTIC_MESSAGE_TYPE:
diff --git a/common/utils/itti_analyzer/libui/ui_tree_view.c b/common/utils/itti_analyzer/libui/ui_tree_view.c
index 21bc7dc23d742fd711f577326c8d1a0ed8dc8f9b..920832b8c60b8ca7fe39fb9e6693059490db2a67 100644
--- a/common/utils/itti_analyzer/libui/ui_tree_view.c
+++ b/common/utils/itti_analyzer/libui/ui_tree_view.c
@@ -46,7 +46,7 @@ static gboolean ui_tree_filter_messages(GtkTreeModel *model, GtkTreeIter *iter,
     if (ui_filters.filters_enabled)
     {
         gtk_tree_model_get (model, iter, COL_MSG_NUM, &msg_number, COL_MESSAGE_ID, &message_id, COL_FROM_TASK_ID,
-                            &origin_task_id, COL_TO_TASK_ID, &destination_task_id, COL_INSTANCE, &instance, -1);
+                            &origin_task_id, COL_TO_TASK_ID, &destination_task_id, COL_INSTANCE_ID, &instance, -1);
         if (msg_number != 0)
         {
             enabled = ui_filters_message_enabled (message_id, origin_task_id, destination_task_id, instance);
@@ -141,12 +141,13 @@ static void ui_tree_view_init_list(GtkWidget *list)
             G_TYPE_STRING, // COL_MESSAGE
             G_TYPE_STRING, // COL_FROM_TASK
             G_TYPE_STRING, // COL_TO_TASK
-            G_TYPE_UINT, // COL_INSTANCE
+            G_TYPE_STRING, // COL_INSTANCE
             // Not displayed columns
             // Id of some message fields to speed-up filtering
             G_TYPE_UINT, // COL_MESSAGE_ID
             G_TYPE_UINT, // COL_FROM_TASK_ID
             G_TYPE_UINT, // COL_TO_TASK_ID
+            G_TYPE_UINT, // COL_INSTANCE_ID
             G_TYPE_STRING, // COL_FOREGROUND
             G_TYPE_STRING, // COL_BACKGROUND
             G_TYPE_BOOLEAN, // COL_STRIKETHROUGH
@@ -169,23 +170,28 @@ static void ui_tree_view_init_list(GtkWidget *list)
 
 static void ui_tree_view_add_to_list(GtkWidget *list, const gchar *lte_time, const uint32_t message_number,
                                      const uint32_t message_id, const gchar *signal_name, const uint32_t origin_task_id,
-                                     const char *origin_task, const uint32_t destination_task_id,
-                                     const char *destination_task, uint32_t instance, gpointer buffer)
+                                     const char *origin_task_name, const uint32_t destination_task_id,
+                                     const char *destination_task_name, uint32_t instance_id, const char *instance_name, gpointer buffer)
 {
     GtkTreeIter iter;
     gboolean enabled;
+    int message_index;
 
-    enabled = ui_filters_message_enabled (message_id, origin_task_id, destination_task_id, instance);
-    int message_index = ui_filters_search_id (&ui_filters.messages, message_id);
+    g_info("ui_tree_view_add_to_list: %d %d %d %d %d", message_number, message_id, origin_task_id, destination_task_id, instance_id);
+
+    enabled = ui_filters_message_enabled (message_id, origin_task_id, destination_task_id, instance_id);
+    message_index = ui_filters_search_id (&ui_filters.messages, message_id);
+
+    g_info("ui_tree_view_add_to_list: %d %d", enabled, message_index);
 
     gtk_list_store_append (ui_store.store, &iter);
     gtk_list_store_set (ui_store.store, &iter,
     /* Columns */
     COL_MSG_NUM,
-                        message_number, COL_LTE_TIME, lte_time, COL_MESSAGE, signal_name, COL_FROM_TASK, origin_task,
-                        COL_TO_TASK, destination_task, COL_INSTANCE, instance, COL_MESSAGE_ID, message_id,
-                        COL_FROM_TASK_ID, origin_task_id, COL_TO_TASK_ID, destination_task_id, COL_BUFFER, buffer,
-                        COL_FOREGROUND, ui_filters.messages.items[message_index].foreground, COL_BACKGROUND,
+                        message_number, COL_LTE_TIME, lte_time, COL_MESSAGE, signal_name, COL_FROM_TASK, origin_task_name,
+                        COL_TO_TASK, destination_task_name, COL_INSTANCE, instance_name, COL_MESSAGE_ID, message_id,
+                        COL_FROM_TASK_ID, origin_task_id, COL_TO_TASK_ID, destination_task_id, COL_INSTANCE_ID, instance_id,
+                        COL_BUFFER, buffer, COL_FOREGROUND, ui_filters.messages.items[message_index].foreground, COL_BACKGROUND,
                         ui_filters.messages.items[message_index].background, COL_STRIKETHROUGH, !enabled,
                         /* End of columns */
                         -1);
@@ -371,7 +377,7 @@ int ui_tree_view_create(GtkWidget *window, GtkWidget *vbox)
     ui_tree_view_init_list (ui_main_data.messages_list);
     gtk_tree_view_set_headers_clickable (GTK_TREE_VIEW(ui_main_data.messages_list), TRUE);
 
-    gtk_scrolled_window_set_min_content_width (GTK_SCROLLED_WINDOW(scrolled_window), 670);
+    gtk_scrolled_window_set_min_content_width (GTK_SCROLLED_WINDOW(scrolled_window), 680);
     gtk_paned_pack1 (GTK_PANED (hbox), scrolled_window, FALSE, TRUE);
     ui_main_data.text_view = ui_signal_dissect_new (hbox);
 
@@ -395,26 +401,55 @@ int ui_tree_view_create(GtkWidget *window, GtkWidget *vbox)
 }
 
 int ui_tree_view_new_signal_ind(const uint32_t message_number, const gchar *lte_time, const uint32_t message_id,
-                                const char *message_name, const uint32_t origin_task_id, const char *origin_task,
-                                const uint32_t destination_task_id, const char *destination_task, uint32_t instance,
+                                const char *message_name, const uint32_t origin_task_id, const char *origin_task_name,
+                                const uint32_t destination_task_id, const char *destination_task_name, uint32_t instance_id,
                                 gpointer buffer)
 {
-    if (ui_store.instance_number < (instance + 1))
+    char *instance_name = NULL;
+    char instance_name_buffer[10];
+
+    if (((instance_t) instance_id) < INSTANCE_DEFAULT)
+    {
+        if (ui_store.instance_number < (instance_id + 1))
+        {
+            int i;
+
+            for (i = ui_store.instance_number; i <= instance_id; i++)
+            {
+                sprintf (instance_name_buffer, "%d", i);
+                ui_filters_add (FILTER_INSTANCES, i, instance_name_buffer, ENTRY_ENABLED_TRUE, NULL, NULL);
+            }
+            ui_store.instance_number = (instance_id + 1);
+            ui_destroy_filter_menu (FILTER_INSTANCES);
+        }
+
+        sprintf (instance_name_buffer, "%d", instance_id);
+        instance_name = instance_name_buffer;
+    }
+    else
     {
-        int i;
-        char name[10];
+        switch ((instance_t) instance_id)
+        {
+            case INSTANCE_DEFAULT:
+                instance_name = "DEF";
+                break;
+
+            case INSTANCE_ALL:
+                instance_name = "ALL";
+                break;
+
+            default:
+                break;
+        }
 
-        for (i = ui_store.instance_number; i <= instance; i++)
+        if ((instance_name != NULL) && (ui_filters_search_id (&ui_filters.instances, instance_id) < 0))
         {
-            sprintf (name, "%d", i);
-            ui_filters_add (FILTER_INSTANCES, i, name, ENTRY_ENABLED_TRUE, NULL, NULL);
+            ui_filters_add (FILTER_INSTANCES, instance_id, instance_name, ENTRY_ENABLED_TRUE, NULL, NULL);
         }
-        ui_store.instance_number = (instance + 1);
-        ui_destroy_filter_menu (FILTER_INSTANCES);
     }
 
     ui_tree_view_add_to_list (ui_main_data.messages_list, lte_time, message_number, message_id, message_name,
-                              origin_task_id, origin_task, destination_task_id, destination_task, instance,
+                              origin_task_id, origin_task_name, destination_task_id, destination_task_name, instance_id, instance_name,
                               (buffer_t *) buffer);
 
     return RC_OK;
@@ -430,7 +465,7 @@ void ui_tree_view_select_row(gint row)
 
         if ((ui_main_data.messages_list != NULL) && (path_row != NULL))
         {
-            g_debug("Select row %d", row);
+            g_info("Select row %d", row);
 
             /* Select the message in requested row */
             gtk_tree_view_set_cursor (GTK_TREE_VIEW(ui_main_data.messages_list), path_row, NULL, FALSE);
@@ -451,7 +486,7 @@ static gboolean updateColors(GtkTreeModel *model, GtkTreePath *path, GtkTreeIter
     int message_index;
 
     gtk_tree_model_get (model, iter, COL_MESSAGE_ID, &message_id, COL_FROM_TASK_ID, &origin_task_id, COL_TO_TASK_ID,
-                        &destination_task_id, COL_INSTANCE, &instance, -1);
+                        &destination_task_id, COL_INSTANCE_ID, &instance, -1);
     enabled = ui_filters_message_enabled (message_id, origin_task_id, destination_task_id, instance);
     message_index = ui_filters_search_id (&ui_filters.messages, message_id);
 
@@ -471,6 +506,21 @@ void ui_tree_view_refilter()
     if (ui_store.store != NULL)
     {
         gtk_tree_model_foreach (GTK_TREE_MODEL(ui_store.store), updateColors, NULL);
+
+        if (ui_main_data.messages_list != NULL)
+        {
+            GtkTreePath *path_row;
+
+            /* Get the currently selected message */
+            gtk_tree_view_get_cursor (GTK_TREE_VIEW(ui_main_data.messages_list), &path_row, NULL);
+            if (path_row != NULL)
+            {
+                /* Center the message in the middle of the list if possible */
+                gtk_tree_view_scroll_to_cell (GTK_TREE_VIEW(ui_main_data.messages_list), path_row, NULL, TRUE, 0.5,
+                                              0.0);
+                g_info("ui_tree_view_refilter: center on message");
+            }
+        }
     }
 
     g_info("ui_tree_view_refilter: last message %d, %d messages displayed", ui_store.filtered_last_msg, ui_store.filtered_msg_number);
diff --git a/common/utils/itti_analyzer/libui/ui_tree_view.h b/common/utils/itti_analyzer/libui/ui_tree_view.h
index 3a0fd3f435cc513cc61200275f2c331c46740c09..f0e39d4fb87a8b9e8a0cb312578f232e31c03947 100644
--- a/common/utils/itti_analyzer/libui/ui_tree_view.h
+++ b/common/utils/itti_analyzer/libui/ui_tree_view.h
@@ -15,6 +15,7 @@ typedef enum col_type_e
     COL_MESSAGE_ID,
     COL_FROM_TASK_ID,
     COL_TO_TASK_ID,
+    COL_INSTANCE_ID,
     COL_FOREGROUND,
     COL_BACKGROUND,
     COL_STRIKETHROUGH,
diff --git a/openair2/UTIL/LOG/log.c b/openair2/UTIL/LOG/log.c
index a741841d73c3a3eff8845b4c49c2fe3f669f7b80..2cac79553ec74f6a79873f6488fccbd431fc7a65 100755
--- a/openair2/UTIL/LOG/log.c
+++ b/openair2/UTIL/LOG/log.c
@@ -81,6 +81,10 @@ static int gfd;
 static char *log_level_highlight_start[] = {LOG_RED, LOG_RED, LOG_RED, LOG_RED, LOG_ORANGE, LOG_BLUE, "", ""};  /*!< \brief Optional start-format strings for highlighting */
 static char *log_level_highlight_end[]   = {LOG_RESET, LOG_RESET, LOG_RESET, LOG_RESET, LOG_RESET,LOG_RESET,  "",""};   /*!< \brief Optional end-format strings for highlighting */
 
+#if defined(ENABLE_ITTI)
+static log_instance_type_t log_instance_type;
+#endif
+
 int logInit (void)
 {
 #ifdef USER_MODE
@@ -655,6 +659,7 @@ void logRecord_mt(const char *file, const char *func, int line, int comp,
 #if defined(ENABLE_ITTI)
     if (level <= LOG_DEBUG)
     {
+        task_id_t origin_task_id = TASK_UNKNOWN;
         MessagesIds messages_id;
         MessageDef *message_p;
         size_t      message_string_size;
@@ -662,6 +667,76 @@ void logRecord_mt(const char *file, const char *func, int line, int comp,
 
         message_string_size = log_end - log_start;
 
+#if !defined(DISABLE_ITTI_DETECT_SUB_TASK_ID)
+        /* Try to identify sub task ID from log information (comp, log_instance_type) */
+        switch (comp)
+        {
+          case PHY:
+            switch (log_instance_type)
+            {
+              case LOG_INSTANCE_ENB:
+                origin_task_id = TASK_PHY_ENB;
+                break;
+
+              case LOG_INSTANCE_UE:
+                origin_task_id = TASK_PHY_UE;
+                break;
+
+              default:
+                break;
+            }
+            break;
+
+          case MAC:
+            switch (log_instance_type)
+            {
+              case LOG_INSTANCE_ENB:
+                origin_task_id = TASK_MAC_ENB;
+                break;
+
+              case LOG_INSTANCE_UE:
+                origin_task_id = TASK_MAC_UE;
+
+              default:
+                break;
+            }
+           break;
+
+          case RLC:
+            switch (log_instance_type)
+            {
+              case LOG_INSTANCE_ENB:
+                origin_task_id = TASK_RLC_ENB;
+                break;
+
+              case LOG_INSTANCE_UE:
+                origin_task_id = TASK_RLC_UE;
+
+              default:
+                break;
+            }
+            break;
+
+          case PDCP:
+            switch (log_instance_type)
+            {
+              case LOG_INSTANCE_ENB:
+                origin_task_id = TASK_PDCP_ENB;
+                break;
+
+              case LOG_INSTANCE_UE:
+                origin_task_id = TASK_PDCP_UE;
+
+              default:
+                break;
+            }
+            break;
+
+          default:
+            break;
+        }
+#endif
+
         switch (level)
         {
           case LOG_EMERG:
@@ -687,7 +762,7 @@ void logRecord_mt(const char *file, const char *func, int line, int comp,
             messages_id = DEBUG_LOG;
             break;
         }
-        message_p = itti_alloc_new_message_sized(TASK_UNKNOWN, messages_id, message_string_size);
+        message_p = itti_alloc_new_message_sized(origin_task_id, messages_id, message_string_size);
         switch (level)
         {
           case LOG_EMERG:
@@ -870,6 +945,13 @@ void logClean (void)
 
 }
 
+#if defined(ENABLE_ITTI)
+void log_set_instance_type (log_instance_type_t instance)
+{
+    log_instance_type = instance;
+}
+#endif
+
 #ifdef LOG_TEST
 
 int main(int argc, char *argv[])
diff --git a/openair2/UTIL/LOG/log.h b/openair2/UTIL/LOG/log.h
index 442bcaf045fd7c45876d867bd69d14263b0a28f9..2f866c5159296d03296a98643b03fc88f2649699 100755
--- a/openair2/UTIL/LOG/log.h
+++ b/openair2/UTIL/LOG/log.h
@@ -323,6 +323,16 @@ extern pthread_cond_t log_notify;
 extern int log_shutdown;
 #endif
 
+#if defined(ENABLE_ITTI)
+typedef enum log_instance_type_e {
+  LOG_INSTANCE_UNKNOWN,
+  LOG_INSTANCE_ENB,
+  LOG_INSTANCE_UE,
+} log_instance_type_t;
+
+void log_set_instance_type (log_instance_type_t instance);
+#endif
+
 /*--- INCLUDES ---------------------------------------------------------------*/
 #    include "log_if.h"
 /*----------------------------------------------------------------------------*/
diff --git a/targets/SIMU/USER/oaisim.c b/targets/SIMU/USER/oaisim.c
index 6ba183ec48fa895ef9fe73fb02e3113fd8450a5f..f6f15a44744340a2647d585560b5499413531901 100644
--- a/targets/SIMU/USER/oaisim.c
+++ b/targets/SIMU/USER/oaisim.c
@@ -611,6 +611,10 @@ void *l2l1_task(void *args_p) {
       if(Channel_Flag==0)
 #endif
       {
+#if defined(ENABLE_ITTI)
+        log_set_instance_type (LOG_INSTANCE_ENB);
+#endif
+
         if ((next_slot % 2) == 0)
           clear_eNB_transport_info (oai_emulation.info.nb_enb_local);
 
@@ -657,6 +661,10 @@ void *l2l1_task(void *args_p) {
         // Call ETHERNET emulation here
         //emu_transport (frame, last_slot, next_slot, direction, oai_emulation.info.frame_type, ethernet_flag);
 
+#if defined(ENABLE_ITTI)
+        log_set_instance_type (LOG_INSTANCE_UE);
+#endif
+
         if ((next_slot % 2) == 0)
           clear_UE_transport_info (oai_emulation.info.nb_ue_local);