diff --git a/openair2/LAYER2/NR_MAC_UE/mac_defs.h b/openair2/LAYER2/NR_MAC_UE/mac_defs.h
index e284c29f9f..8a8d9e4ebb 100644
--- a/openair2/LAYER2/NR_MAC_UE/mac_defs.h
+++ b/openair2/LAYER2/NR_MAC_UE/mac_defs.h
@@ -683,10 +683,5 @@ static inline long GET_DURATION_RX_TO_TX(const ntn_timing_advance_componets_t *n
   return NR_UE_CAPABILITY_SLOT_RX_TO_TX + (ntn_ta->cell_specific_k_offset << scs);
 }
 
-static inline double get_total_TA_ms(const ntn_timing_advance_componets_t *ntn_ta)
-{
-  return ntn_ta->N_common_ta_adj;
-}
-
 /*@}*/
 #endif /*__LAYER2_MAC_DEFS_H__ */
diff --git a/openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c b/openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
index 0dae34eda7..b5eeedca3f 100644
--- a/openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
+++ b/openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
@@ -777,13 +777,12 @@ static int nr_get_RA_window_4Step(long ra_ResponseWindow)
   return 0;
 }
 
-static void setup_ra_response_window(RA_config_t *ra,
-                                     int slots_per_frame,
-                                     NR_NTN_Config_r17_t *ntn_Config_r17,
+static void setup_ra_response_window(NR_UE_MAC_INST_t *mac,
+                                     RA_config_t *ra,
                                      NR_RACH_ConfigGeneric_t *configGeneric,
-                                     NR_RACH_ConfigGenericTwoStepRA_r16_t *twostep,
-                                     ntn_timing_advance_componets_t *ntn_ta)
+                                     NR_RACH_ConfigGenericTwoStepRA_r16_t *twostep)
 {
+  const int slots_per_frame = mac->frame_structure.numb_slots_frame;
   int respwind_value = 0;
   if (ra->ra_type == RA_2_STEP) {
     long *msgB_ResponseWindow = twostep->msgB_ResponseWindow_r16;
@@ -816,13 +815,8 @@ static void setup_ra_response_window(RA_config_t *ra,
       LOG_E(NR_MAC, "RA-ResponseWindow need to be configured to a value lower than or equal to 10 ms\n");
   }
 
-  int ta_Common_slots = 0;
-  if (ntn_Config_r17) {
-    const double ta_Common_ms = get_total_TA_ms(ntn_ta);
-    ta_Common_slots = (int)ceil(ta_Common_ms * slots_per_frame / 10);
-  }
-
-  ra->response_window_setup_time = respwind_value + ta_Common_slots;
+  const int ntn_ue_koffset = GET_NTN_UE_K_OFFSET(&mac->ntn_ta, mac->current_UL_BWP->scs);
+  ra->response_window_setup_time = respwind_value + ntn_ue_koffset;
 }
 
 // Random Access procedure initialization as per 5.1.1 and initialization of variables specific
@@ -1026,12 +1020,8 @@ bool init_RA(NR_UE_MAC_INST_t *mac, int frame)
   else
     ra->num_fd_occasions = 1 << rach_ConfigGeneric->msg1_FDM;
 
-  setup_ra_response_window(ra,
-                           mac->frame_structure.numb_slots_frame,
-                           mac->sc_info.ntn_Config_r17,
-                           rach_ConfigGeneric,
-                           twostep_generic,
-                           &mac->ntn_ta);
+  setup_ra_response_window(mac, ra, rach_ConfigGeneric, twostep_generic);
+
   return true;
 }
 
@@ -1039,16 +1029,15 @@ void nr_Msg3_transmitted(NR_UE_MAC_INST_t *mac, uint8_t CC_id, frame_t frameP, s
 {
   RA_config_t *ra = &mac->ra;
   NR_RACH_ConfigCommon_t *nr_rach_ConfigCommon = mac->current_UL_BWP->rach_ConfigCommon;
-  const double ta_Common_ms = get_total_TA_ms(&mac->ntn_ta);
+  const int ntn_ue_koffset = GET_NTN_UE_K_OFFSET(&mac->ntn_ta, mac->current_UL_BWP->scs);
   const int slots_per_ms = mac->frame_structure.numb_slots_frame / 10;
 
   // start contention resolution timer
   const int RA_contention_resolution_timer_ms = (nr_rach_ConfigCommon->ra_ContentionResolutionTimer + 1) << 3;
   const int RA_contention_resolution_timer_slots = RA_contention_resolution_timer_ms * slots_per_ms;
-  const int ta_Common_slots = (int)ceil(ta_Common_ms * slots_per_ms);
 
   // timer step 1 slot and timer target given by ra_ContentionResolutionTimer + ta-Common-r17
-  nr_timer_setup(&ra->contention_resolution_timer, RA_contention_resolution_timer_slots + ta_Common_slots, 1);
+  nr_timer_setup(&ra->contention_resolution_timer, RA_contention_resolution_timer_slots + ntn_ue_koffset, 1);
   nr_timer_start(&ra->contention_resolution_timer);
 
   ra->ra_state = nrRA_WAIT_CONTENTION_RESOLUTION;