diff --git a/core/dev/radio.h b/core/dev/radio.h
index 982acc51dba..abb686a0b56 100644
--- a/core/dev/radio.h
+++ b/core/dev/radio.h
@@ -181,6 +181,8 @@ enum {
   RADIO_CONST_TXPOWER_MIN,
   /* The maximum transmission power in dBm. */
   RADIO_CONST_TXPOWER_MAX
+
+  , RADIO_PARAM_TOTAL
 };
 
 /* Radio power modes */
diff --git a/cpu/cc26xx-cc13xx/dev/oscillators.c b/cpu/cc26xx-cc13xx/dev/oscillators.c
index 7890a8e5586..e6176b10324 100644
--- a/cpu/cc26xx-cc13xx/dev/oscillators.c
+++ b/cpu/cc26xx-cc13xx/dev/oscillators.c
@@ -111,6 +111,28 @@ oscillators_request_hf_xosc(void)
   /* Release the OSC AUX consumer */
   aux_ctrl_unregister_consumer(&osc);
 }
+
+/*---------------------------------------------------------------------------*/
+bool oscillators_wait_ready_hf_xosc(rtimer_clock_t timeout)
+{
+  /* Request AUX access, with OSCCTRL and SMPH clocks */
+  aux_consumer_module_t osc = {
+    .clocks = AUX_WUC_OSCCTRL_CLOCK | AUX_WUC_SMPH_CLOCK
+  };
+  aux_ctrl_register_consumer(&osc);
+  bool res = true;
+  if (ti_lib_osc_clock_source_get(OSC_SRC_CLK_HF) != (OSC_XOSC_HF))
+  while (!ti_lib_osc_hf_source_ready()){
+      if (RTIMER_CLOCK_LT( timeout, RTIMER_NOW() )){
+          res = false;
+          break;
+      }
+  }
+  /* Release the OSC AUX consumer */
+  aux_ctrl_unregister_consumer(&osc);
+  return res;
+}
+
 /*---------------------------------------------------------------------------*/
 void
 oscillators_switch_to_hf_xosc(void)
diff --git a/cpu/cc26xx-cc13xx/dev/oscillators.h b/cpu/cc26xx-cc13xx/dev/oscillators.h
index 47e95a3113c..adddbff2d3c 100644
--- a/cpu/cc26xx-cc13xx/dev/oscillators.h
+++ b/cpu/cc26xx-cc13xx/dev/oscillators.h
@@ -48,6 +48,9 @@
 /*---------------------------------------------------------------------------*/
 #ifndef OSCILLATORS_H_
 #define OSCILLATORS_H_
+
+#include <stdbool.h>
+
 /*---------------------------------------------------------------------------*/
 /**
  * \brief Set the LF clock source to be the LF XOSC
@@ -81,6 +84,16 @@ void oscillators_select_lf_rcosc(void);
  */
 void oscillators_request_hf_xosc(void);
 
+/**
+ * \brief waits until timeout for HF clock be ready, after requested the
+ *   HF XOSC as the source for the HF clock.
+ * \sa oscillators_request_hf_xosc
+ *
+ * This checks while an startup HF XOSC in progess
+ *
+ */
+bool oscillators_wait_ready_hf_xosc(rtimer_clock_t timeout);
+
 /**
  * \brief Performs the switch to the XOSC
  *
diff --git a/cpu/cc26xx-cc13xx/rf-core/prop-mode.c b/cpu/cc26xx-cc13xx/rf-core/prop-mode.c
index 96d0fba7843..0fe86bd2f27 100644
--- a/cpu/cc26xx-cc13xx/rf-core/prop-mode.c
+++ b/cpu/cc26xx-cc13xx/rf-core/prop-mode.c
@@ -144,6 +144,7 @@ static int8_t rssi_threshold = PROP_MODE_RSSI_THRESHOLD;
 /*---------------------------------------------------------------------------*/
 static int on(void);
 static int off(void);
+static rf_power_style power_style = RADIO_POWER_STYLE_FREE;
 
 static rfc_propRxOutput_t rx_stats;
 /*---------------------------------------------------------------------------*/
@@ -888,6 +889,27 @@ pending_packet(void)
   return rv;
 }
 /*---------------------------------------------------------------------------*/
+#include <pwr_ctrl.h>
+static uint32_t power_style_save;
+static
+int rf_power_up(){
+    if (power_style == RADIO_POWER_STYLE_GLDO){
+        power_style_save = PowerCtrlSourceGet();
+        if (power_style_save != PWRCTRL_PWRSRC_GLDO)
+            PowerCtrlSourceSet(PWRCTRL_PWRSRC_GLDO);
+    }
+    return rf_core_power_up();
+}
+
+static
+void rf_power_down(){
+    rf_core_power_down();
+    if (power_style != RADIO_POWER_STYLE_FREE) {
+        if (PowerCtrlSourceGet() != power_style_save)
+            PowerCtrlSourceSet(power_style_save);
+    }
+}
+
 static int
 on(void)
 {
@@ -904,6 +926,9 @@ on(void)
    * use the FS. This will only request, it will _not_ perform the switch.
    */
   oscillators_request_hf_xosc();
+#if (RF_CORE_HFOSC_STARTUP_TOUS > 0)
+  rtimer_clock_t hf_start_time = RTIMER_NOW();
+#endif
 
   if(rf_is_on()) {
     PRINTF("on: We were on. PD=%u, RX=0x%04x \n", rf_core_is_accessible(),
@@ -912,10 +937,10 @@ on(void)
   }
 
   if(!rf_core_is_accessible()) {
-    if(rf_core_power_up() != RF_CORE_CMD_OK) {
+    if(rf_power_up() != RF_CORE_CMD_OK) {
       PRINTF("on: rf_core_power_up() failed\n");
 
-      rf_core_power_down();
+      rf_power_down();
 
       return RF_CORE_CMD_ERROR;
     }
@@ -947,12 +972,23 @@ on(void)
     if(rf_core_start_rat() != RF_CORE_CMD_OK) {
       PRINTF("on: rf_core_start_rat() failed\n");
 
-      rf_core_power_down();
+      rf_power_down();
 
       return RF_CORE_CMD_ERROR;
     }
   }
 
+#if (RF_CORE_HFOSC_STARTUP_TOUS > 0)
+  const unsigned hf_start_timeout = US_TO_RTIMERTICKS(RF_CORE_HFOSC_STARTUP_TOUS);
+  rtimer_clock_t hf_start_limit = hf_start_time + hf_start_timeout;
+  if( !oscillators_wait_ready_hf_xosc(hf_start_limit) ){
+      PRINTF("on: rf_core_start_rat() failed start HF\n");
+      rf_power_down();
+      trace_rf_on_off();
+      return RF_CORE_CMD_ERROR;
+  }
+#endif
+
   rf_core_setup_interrupts(false);
 
   init_rx_buffers();
@@ -989,7 +1025,7 @@ off(void)
   }
 
   rx_off_prop();
-  rf_core_power_down();
+  rf_power_down();
 
   ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
 
@@ -1068,6 +1104,14 @@ set_value(radio_param_t param, radio_value_t value)
       return RADIO_RESULT_OK;
     }
     return RADIO_RESULT_INVALID_VALUE;
+
+  case RADIO_CC26_POWER_STYLE:
+      if (value < RADIO_POWER_STYLE_TOTAL){
+          power_style = value;
+          return RADIO_RESULT_OK;
+      }
+      return RADIO_RESULT_INVALID_VALUE;
+
   case RADIO_PARAM_CHANNEL:
     if(value < 0 ||
        value > DOT_15_4G_CHANNEL_MAX) {
@@ -1098,6 +1142,9 @@ set_value(radio_param_t param, radio_value_t value)
     }
 
     return RADIO_RESULT_OK;
+  case RADIO_CC26_POWER_STYLE:
+      *value = power_style;
+      return RADIO_RESULT_OK;
   case RADIO_PARAM_RX_MODE:
     return RADIO_RESULT_OK;
   case RADIO_PARAM_CCA_THRESHOLD:
diff --git a/cpu/cc26xx-cc13xx/rf-core/prop-mode.h b/cpu/cc26xx-cc13xx/rf-core/prop-mode.h
index 55048777acb..772e45ae5ff 100644
--- a/cpu/cc26xx-cc13xx/rf-core/prop-mode.h
+++ b/cpu/cc26xx-cc13xx/rf-core/prop-mode.h
@@ -52,6 +52,19 @@ typedef struct prop_mode_tx_power_config {
   radio_value_t dbm;
   uint16_t tx_power; /* Value for the PROP_DIV_RADIO_SETUP.txPower field */
 } prop_mode_tx_power_config_t;
+
+#include <dev/radio.h>
+enum rf_power_style {
+    RADIO_POWER_STYLE_FREE
+    , RADIO_POWER_STYLE_GLDO
+    , RADIO_POWER_STYLE_TOTAL
+};
+typedef enum rf_power_style rf_power_style;
+enum {
+      RADIO_CC26_PARAMS = RADIO_PARAM_TOTAL
+    , RADIO_CC26_POWER_STYLE
+};
+
 /*---------------------------------------------------------------------------*/
 #endif /* PROP_MODE_H_ */
 /*---------------------------------------------------------------------------*/
diff --git a/cpu/cc26xx-cc13xx/rf-core/rf-core.h b/cpu/cc26xx-cc13xx/rf-core/rf-core.h
index 762aa565042..127a4fb7dd7 100644
--- a/cpu/cc26xx-cc13xx/rf-core/rf-core.h
+++ b/cpu/cc26xx-cc13xx/rf-core/rf-core.h
@@ -103,6 +103,17 @@
 #define RF_CORE_PROP_BIAS_MODE RF_CORE_BIAS_MODE_EXTERNAL
 #endif
 /*---------------------------------------------------------------------------*/
+/* RF-Front End RAT resyncing strategy provides mechanisms for RAT sync monitoring
+ *  and resyncing
+ *  0 :    resync only on rf-core propety setup
+ *  1 :    validate RF-timestamp in window of current operation, and resync if violate
+ * */
+#ifdef RF_CORE_CONF_HFOSC_STARTUP_TOUS
+#define RF_CORE_HFOSC_STARTUP_TOUS    RF_CORE_CONF_HFOSC_STARTUP_TOUS
+#else
+//#define RF_CORE_HFOSC_STARTUP_TOUS    1000
+#endif
+/*---------------------------------------------------------------------------*/
 #define RF_CORE_CMD_ERROR                     0
 #define RF_CORE_CMD_OK                        1
 /*---------------------------------------------------------------------------*/