Temporary fix for skip DL slots with invalid dl_DataToUL_ACK timing with OAI UE

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -785,6 +785,11 @@ void nr_schedule_ue_spec(module_id_t module_id,
   if (!is_xlsch_in_slot(gNB_mac->dlsch_slot_bitmap[slot / 64], slot))
     return;
 
+  // FIXME: Feedback timing for ack/nack are not adapted for OAI UE, which has a rx/tx delay of 6 slots.
+  //  As k2 for pusch needs to be at least 6, dl_DataToUL_ACK needs to be not lower than 6.
+  if(IS_SOFTMODEM_RFSIM && slot!=1)
+    return;
+
   /* PREPROCESSOR */
   gNB_mac->pre_processor_dl(module_id, frame, slot);