diff --git a/lib/include/srslte/interfaces/ue_interfaces.h b/lib/include/srslte/interfaces/ue_interfaces.h
index 06dfa54ce..1242485af 100644
--- a/lib/include/srslte/interfaces/ue_interfaces.h
+++ b/lib/include/srslte/interfaces/ue_interfaces.h
@@ -199,7 +199,6 @@ public:
                plmn_search_completed(const rrc_interface_nas::found_plmn_t found_plmns[rrc_interface_nas::MAX_FOUND_PLMNS],
                                      int                                   nof_plmns)       = 0;
   virtual bool connection_request_completed(bool outcome) = 0;
-  virtual void run_tti(uint32_t tti)                      = 0;
 };
 
 // NAS interface for UE
@@ -386,9 +385,6 @@ public:
 
   /* Communicate the number of mbsfn services available  */
   virtual void set_mbsfn_config(uint32_t nof_mbsfn_services) = 0;
-
-  /* Indicate new TTI */
-  virtual void run_tti(const uint32_t tti) = 0;
 };
 
 /* Interface RRC -> MAC shared between different RATs */
@@ -622,6 +618,9 @@ public:
 // Combined interface for PHY to access stack (MAC and RRC)
 class stack_interface_phy_lte : public mac_interface_phy_lte, public rrc_interface_phy_lte
 {
+public:
+  /* Indicate new TTI */
+  virtual void run_tti(const uint32_t tti, const uint32_t tti_jump) = 0;
 };
 
 // Combined interface for stack (MAC and RRC) to access PHY
diff --git a/srsue/hdr/stack/rrc/rrc.h b/srsue/hdr/stack/rrc/rrc.h
index 14c3fd173..bc9a30aa5 100644
--- a/srsue/hdr/stack/rrc/rrc.h
+++ b/srsue/hdr/stack/rrc/rrc.h
@@ -325,7 +325,7 @@ public:
   // MAC interface
   void ho_ra_completed(bool ra_successful);
   void release_pucch_srs();
-  void run_tti(uint32_t tti);
+  void run_tti();
   void ra_problem();
 
   // GW interface
diff --git a/srsue/hdr/stack/rrc/rrc_meas.h b/srsue/hdr/stack/rrc/rrc_meas.h
index fae8be6e4..983440f63 100644
--- a/srsue/hdr/stack/rrc/rrc_meas.h
+++ b/srsue/hdr/stack/rrc/rrc_meas.h
@@ -45,7 +45,7 @@ public:
   void init(rrc* rrc_ptr);
   void reset();
   bool parse_meas_config(const rrc_conn_recfg_r8_ies_s* meas_config, bool is_ho_reest = false, uint32_t src_earfcn = 0);
-  void run_tti(const uint32_t tti);
+  void run_tti();
   void update_phy();
   float rsrp_filter(const float new_value, const float avg_value);
   float rsrq_filter(const float new_value, const float avg_value);
diff --git a/srsue/hdr/stack/ue_stack_lte.h b/srsue/hdr/stack/ue_stack_lte.h
index 0581a2190..5d0661e03 100644
--- a/srsue/hdr/stack/ue_stack_lte.h
+++ b/srsue/hdr/stack/ue_stack_lte.h
@@ -68,12 +68,12 @@ public:
   int  init(const stack_args_t& args_, srslte::logger* logger_);
   int  init(const stack_args_t& args_, srslte::logger* logger_, phy_interface_stack_lte* phy_, gw_interface_stack* gw_);
   bool switch_on() final;
-  bool switch_off();
+  bool switch_off() final;
   bool enable_data();
   bool disable_data();
-  void stop();
+  void stop() final;
 
-  bool get_metrics(stack_metrics_t* metrics);
+  bool get_metrics(stack_metrics_t* metrics) final;
   bool is_rrc_connected();
 
   // RRC interface for PHY
@@ -82,33 +82,36 @@ public:
   void new_cell_meas(const std::vector<phy_meas_t>& meas) override { rrc.new_cell_meas(meas); }
 
   // MAC Interface for PHY
-  uint16_t get_dl_sched_rnti(uint32_t tti) { return mac.get_dl_sched_rnti(tti); }
-  uint16_t get_ul_sched_rnti(uint32_t tti) { return mac.get_ul_sched_rnti(tti); }
+  uint16_t get_dl_sched_rnti(uint32_t tti) final { return mac.get_dl_sched_rnti(tti); }
+  uint16_t get_ul_sched_rnti(uint32_t tti) final { return mac.get_ul_sched_rnti(tti); }
 
-  void new_grant_ul(uint32_t cc_idx, mac_grant_ul_t grant, tb_action_ul_t* action)
+  void new_grant_ul(uint32_t cc_idx, mac_grant_ul_t grant, tb_action_ul_t* action) final
   {
     mac.new_grant_ul(cc_idx, grant, action);
   }
 
-  void new_grant_dl(uint32_t cc_idx, mac_grant_dl_t grant, tb_action_dl_t* action)
+  void new_grant_dl(uint32_t cc_idx, mac_grant_dl_t grant, tb_action_dl_t* action) final
   {
     mac.new_grant_dl(cc_idx, grant, action);
   }
 
-  void tb_decoded(uint32_t cc_idx, mac_grant_dl_t grant, bool ack[SRSLTE_MAX_CODEWORDS])
+  void tb_decoded(uint32_t cc_idx, mac_grant_dl_t grant, bool ack[SRSLTE_MAX_CODEWORDS]) final
   {
     mac.tb_decoded(cc_idx, grant, ack);
   }
 
-  void bch_decoded_ok(uint32_t cc_idx, uint8_t* payload, uint32_t len) { mac.bch_decoded_ok(cc_idx, payload, len); }
+  void bch_decoded_ok(uint32_t cc_idx, uint8_t* payload, uint32_t len) final
+  {
+    mac.bch_decoded_ok(cc_idx, payload, len);
+  }
 
-  void mch_decoded(uint32_t len, bool crc) { mac.mch_decoded(len, crc); }
+  void mch_decoded(uint32_t len, bool crc) final { mac.mch_decoded(len, crc); }
 
-  void new_mch_dl(srslte_pdsch_grant_t phy_grant, tb_action_dl_t* action) { mac.new_mch_dl(phy_grant, action); }
+  void new_mch_dl(srslte_pdsch_grant_t phy_grant, tb_action_dl_t* action) final { mac.new_mch_dl(phy_grant, action); }
 
-  void set_mbsfn_config(uint32_t nof_mbsfn_services) { mac.set_mbsfn_config(nof_mbsfn_services); }
+  void set_mbsfn_config(uint32_t nof_mbsfn_services) final { mac.set_mbsfn_config(nof_mbsfn_services); }
 
-  void run_tti(uint32_t tti) final;
+  void run_tti(uint32_t tti, uint32_t tti_jump) final;
 
   // Interface for GW
   void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking) final;
@@ -128,9 +131,10 @@ public:
   srslte::timer_handler::unique_timer get_unique_timer() override { return timers.get_unique_timer(); }
 
 private:
-  void run_thread() final;
-  void run_tti_impl(uint32_t tti);
-  void stop_impl();
+  void           run_thread() final;
+  void           run_tti_impl(uint32_t tti, uint32_t tti_jump);
+  void           calc_tti_stats(const uint32_t duration_us);;
+  void           stop_impl();
 
   const uint32_t                  TTI_STAT_PERIOD = 1024;
   const std::chrono::milliseconds TTI_WARN_THRESHOLD_MS{5};
diff --git a/srsue/hdr/stack/upper/nas.h b/srsue/hdr/stack/upper/nas.h
index 992a10075..f8fa61913 100644
--- a/srsue/hdr/stack/upper/nas.h
+++ b/srsue/hdr/stack/upper/nas.h
@@ -43,7 +43,7 @@ public:
   nas(srslte::timer_handler* timers_);
   void init(usim_interface_nas* usim_, rrc_interface_nas* rrc_, gw_interface_nas* gw_, const nas_args_t& args_);
   void stop();
-  void run_tti(uint32_t tti) final;
+  void run_tti();
 
   void        get_metrics(nas_metrics_t* m);
   emm_state_t get_state();
@@ -130,9 +130,9 @@ private:
 
   // timers
   srslte::timer_handler*              timers = nullptr;
-  srslte::timer_handler::unique_timer t3410; // started when attach request is sent, on expiry, start t3411
-  srslte::timer_handler::unique_timer t3411; // started when attach failed
-  srslte::timer_handler::unique_timer t3421; // started when detach request is sent
+  srslte::timer_handler::unique_timer t3410;          // started when attach request is sent, on expiry, start t3411
+  srslte::timer_handler::unique_timer t3411;          // started when attach failed
+  srslte::timer_handler::unique_timer t3421;          // started when detach request is sent
   srslte::timer_handler::unique_timer reattach_timer; // started to trigger delayed re-attach
 
   // Values according to TS 24.301 Sec 10.2
diff --git a/srsue/src/phy/sync.cc b/srsue/src/phy/sync.cc
index 27e5d9c91..95a02dae7 100644
--- a/srsue/src/phy/sync.cc
+++ b/srsue/src/phy/sync.cc
@@ -883,12 +883,14 @@ int sync::radio_recv_fnc(srslte::rf_buffer_t& data, uint32_t nsamples, srslte_ti
     srslte_timestamp_copy(&radio_ts, rx_time);
 
     // Advance stack in time
-    while (srslte_timestamp_compare(rx_time, &tti_ts) > 0) {
+    if (srslte_timestamp_compare(rx_time, &tti_ts) > 0) {
+      uint32_t tti_jump = ceil((srslte_timestamp_real(rx_time) - srslte_timestamp_real(&tti_ts)) / 1.0e-3);
+
       // Run stack
-      stack->run_tti(tti);
+      stack->run_tti(tti, tti_jump);
 
-      // Increase one millisecond
-      srslte_timestamp_add(&tti_ts, 0, 1.0e-3f);
+      // Increase by the number of tti jumps detected
+      srslte_timestamp_add(&tti_ts, 0, tti_jump * 1.0e-3f);
     }
 
     if (channel_emulator && rx_time) {
diff --git a/srsue/src/stack/rrc/rrc.cc b/srsue/src/stack/rrc/rrc.cc
index fe0cb3534..f55fd71a8 100644
--- a/srsue/src/stack/rrc/rrc.cc
+++ b/srsue/src/stack/rrc/rrc.cc
@@ -219,14 +219,12 @@ bool rrc::have_drb()
  * RRC State Machine
  *
  */
-void rrc::run_tti(uint32_t tti)
+void rrc::run_tti()
 {
   if (!initiated) {
     return;
   }
 
-  rrc_log->step(tti);
-
   if (simulate_rlf) {
     radio_link_failure();
     simulate_rlf = false;
@@ -259,7 +257,7 @@ void rrc::run_tti(uint32_t tti)
       }
       break;
     case RRC_STATE_CONNECTED:
-      measurements->run_tti(tti);
+      measurements->run_tti();
       break;
     default:
       break;
diff --git a/srsue/src/stack/rrc/rrc_meas.cc b/srsue/src/stack/rrc/rrc_meas.cc
index 53a5790d4..7a1c7edf2 100644
--- a/srsue/src/stack/rrc/rrc_meas.cc
+++ b/srsue/src/stack/rrc/rrc_meas.cc
@@ -103,7 +103,7 @@ bool rrc::rrc_meas::parse_meas_config(const rrc_conn_recfg_r8_ies_s* mob_reconf_
   return ret;
 }
 
-void rrc::rrc_meas::run_tti(const uint32_t tti)
+void rrc::rrc_meas::run_tti()
 {
   std::lock_guard<std::mutex> lock(meas_cfg_mutex);
 
diff --git a/srsue/src/stack/ue_stack_lte.cc b/srsue/src/stack/ue_stack_lte.cc
index 76dbae796..fbc64ed4a 100644
--- a/srsue/src/stack/ue_stack_lte.cc
+++ b/srsue/src/stack/ue_stack_lte.cc
@@ -298,22 +298,25 @@ void ue_stack_lte::out_of_sync()
   pending_tasks.push(sync_queue_id, [this]() { rrc.out_of_sync(); });
 }
 
-void ue_stack_lte::run_tti(uint32_t tti)
+void ue_stack_lte::run_tti(uint32_t tti, uint32_t tti_jump)
 {
-  pending_tasks.push(sync_queue_id, [this, tti]() { run_tti_impl(tti); });
+  pending_tasks.push(sync_queue_id, [this, tti, tti_jump]() { run_tti_impl(tti, tti_jump); });
 }
 
-void ue_stack_lte::run_tti_impl(uint32_t tti)
+void ue_stack_lte::run_tti_impl(uint32_t tti, uint32_t tti_jump)
 {
   if (args.have_tti_time_stats) {
     tti_tprof.start();
   }
 
   // perform tasks in this TTI
-  mac.run_tti(tti);
-  rrc.run_tti(tti);
-  nas.run_tti(tti);
-  timers.step_all();
+  for (uint32_t i = 0; i < tti_jump; ++i) {
+    uint32_t next_tti = TTI_SUB(tti, (tti_jump - i - 1));
+    mac.run_tti(next_tti);
+    rrc.run_tti();
+    nas.run_tti();
+    timers.step_all();
+  }
 
   if (args.have_tti_time_stats) {
     std::chrono::nanoseconds dur = tti_tprof.stop();
diff --git a/srsue/src/stack/upper/nas.cc b/srsue/src/stack/upper/nas.cc
index a798c7f13..de4ffd3bb 100644
--- a/srsue/src/stack/upper/nas.cc
+++ b/srsue/src/stack/upper/nas.cc
@@ -239,7 +239,7 @@ void nas::init(usim_interface_nas* usim_, rrc_interface_nas* rrc_, gw_interface_
   usim    = usim_;
   rrc     = rrc_;
   gw      = gw_;
-  state = EMM_STATE_DEREGISTERED;
+  state   = EMM_STATE_DEREGISTERED;
 
   if (!usim->get_home_plmn_id(&home_plmn)) {
     nas_log->error("Getting Home PLMN Id from USIM. Defaulting to 001-01\n");
@@ -310,7 +310,7 @@ emm_state_t nas::get_state()
   return state;
 }
 
-void nas::run_tti(uint32_t tti)
+void nas::run_tti()
 {
   callbacks.run();
 }
diff --git a/srsue/test/phy/ue_phy_test.cc b/srsue/test/phy/ue_phy_test.cc
index dc481920c..7ee96a9ff 100644
--- a/srsue/test/phy/ue_phy_test.cc
+++ b/srsue/test/phy/ue_phy_test.cc
@@ -108,7 +108,7 @@ private:
     void mch_decoded(uint32_t len, bool crc) override {}
     void new_mch_dl(srslte_pdsch_grant_t phy_grant, tb_action_dl_t* action) override {}
     void set_mbsfn_config(uint32_t nof_mbsfn_services) override {}
-    void run_tti(const uint32_t tti) override
+    void run_tti(const uint32_t tti, const uint32_t tti_jump) override
     {
       notify_run_tti();
       log_h.info("Run TTI %d\n", tti);
diff --git a/srsue/test/ttcn3/src/lte_ttcn3_phy.cc b/srsue/test/ttcn3/src/lte_ttcn3_phy.cc
index 4b416998f..99e118a3b 100644
--- a/srsue/test/ttcn3/src/lte_ttcn3_phy.cc
+++ b/srsue/test/ttcn3/src/lte_ttcn3_phy.cc
@@ -403,7 +403,7 @@ void lte_ttcn3_phy::run_tti()
     sr_tx_tti  = current_tti;
   }
 
-  stack->run_tti(current_tti);
+  stack->run_tti(current_tti, 1);
 }
 
 void lte_ttcn3_phy::set_cells_to_meas(uint32_t earfcn, const std::set<uint32_t>& pci) {}
diff --git a/srsue/test/upper/nas_test.cc b/srsue/test/upper/nas_test.cc
index 78a534154..e302c50aa 100644
--- a/srsue/test/upper/nas_test.cc
+++ b/srsue/test/upper/nas_test.cc
@@ -161,10 +161,9 @@ public:
   bool is_lcid_enabled(uint32_t lcid) { return pdcp->is_lcid_enabled(lcid); }
   void run_thread()
   {
-    running          = true;
-    uint32_t counter = 0;
+    running = true;
     while (running) {
-      nas->run_tti(counter++);
+      nas->run_tti();
     }
   }
   void stop()
diff --git a/srsue/test/upper/rrc_meas_test.cc b/srsue/test/upper/rrc_meas_test.cc
index b9ae9a62f..9c9ee0555 100644
--- a/srsue/test/upper/rrc_meas_test.cc
+++ b/srsue/test/upper/rrc_meas_test.cc
@@ -181,7 +181,7 @@ public:
   void run_tti(uint32_t tti_)
   {
     timers->step_all();
-    rrc::run_tti(tti_);
+    rrc::run_tti();
   }
 
   // Set RRC in state RRC_CONNECTED