L2 changes for NR UE demo

openair2/LAYER2/MAC/defs.h

@@ -1045,6 +1045,20 @@ typedef struct {
   frame_t     txFrame;
   /// TX subframe counter
   sub_frame_t txSubframe;
+#ifdef UE_NR_PHY_DEMO
+  /// NR numerology index [0..5] as specified in 38.211 Section 4 (mu). 0=15khZ SCS, 1=30khZ, 2=60kHz, etc
+  uint8_t numerology_index;
+  /// NR number of ttis per subframe deduced from numerology (cf 38.211): 1, 2, 4, 8(not supported),16(not supported),32(not supported)
+  uint8_t ttis_per_subframe;
+  /// NR number of slots per tti . Assumption only 2 Slot per TTI is supported (Slot Config 1 in 38.211)
+  uint8_t slots_per_tti;
+  /// NR TTI index within subframe_tx [0 .. ttis_per_subframe - 1] to act upon for transmission
+  nr_tti_t txNRTti;
+  /// NR TTI index within subframe_rx [0 .. ttis_per_subframe - 1] to act upon for reception
+  nr_tti_t rxNRTti;
+  /// TX last absolute subframe
+  uint32_t txLastAbsSubframe;
+#endif
   /// C-RNTI of UE
   uint16_t crnti;
   /// C-RNTI of UE before HO

openair2/LAYER2/MAC/ue_procedures.c

@@ -1861,6 +1861,10 @@ ue_scheduler(
   instance_t    instance;
   int           result;
 #endif
+#ifdef UE_NR_PHY_DEMO
+  boolean_t isNewTxSubframe = (UE_mac_inst[module_idP].txLastAbsSubframe != (txFrameP*10 + txSubframeP));
+  UE_mac_inst[module_idP].txLastAbsSubframe = (txFrameP*10 + txSubframeP);
+#endif
 #if UE_TIMING_TRACE
   start_meas(&UE_mac_inst[module_idP].ue_scheduler);
 #endif
@@ -1903,12 +1907,22 @@ ue_scheduler(
   //Rrc_xface->Frame_index=Mac_rlc_xface->frameP;
   //if (subframe%5 == 0)
   //LG#ifdef EXMIMO
+#ifdef UE_NR_PHY_DEMO
+  // call pdcp_run every subframe on TTI0. To check later if OK
+  if (isNewTxSubframe)
+#endif
+  {
   pdcp_run(&ctxt);
+  }
   //#endif
   UE_mac_inst[module_idP].txFrame    = txFrameP;
   UE_mac_inst[module_idP].txSubframe = txSubframeP;
   UE_mac_inst[module_idP].rxFrame    = rxFrameP;
   UE_mac_inst[module_idP].rxSubframe = rxSubframeP;
+#ifdef UE_NR_PHY_DEMO
+  UE_mac_inst[module_idP].txNRTti = txNRTtiP;
+  UE_mac_inst[module_idP].rxNRTti = rxNRTtiP;
+#endif
 
 #ifdef CELLULAR
   rrc_rx_tx(module_idP, txFrameP, 0, eNB_indexP);
@@ -1973,6 +1987,11 @@ ue_scheduler(
       //return(RRC_OK);
     }
 
+#ifdef UE_NR_PHY_DEMO
+  // NR: update and check contention resolution only on every new subframe (TTI0). To check later
+  if (isNewTxSubframe)
+#endif
+   {
 		LOG_I(MAC,"Frame %d: Contention resolution timer %d/%ld\n",txFrameP,UE_mac_inst[module_idP].RA_contention_resolution_cnt,
 			  ((1+rach_ConfigCommon->ra_SupervisionInfo.mac_ContentionResolutionTimer)<<3));
 
@@ -1987,9 +2006,11 @@ ue_scheduler(
 		  mac_xface->ra_failed(module_idP,0,eNB_indexP);
 		}
     }
+  }
 
 
   // Get RLC status info and update Bj for all lcids that are active
+  // NR LCP: not necessary to update as LCP is not used in OAI but should be done once handling several DRB
   for (lcid=DCCH; lcid < MAX_NUM_LCID; lcid++ ) {
     if (UE_mac_inst[module_idP].logicalChannelConfig[lcid]) {
       // meausre the Bj
@@ -2024,6 +2045,11 @@ ue_scheduler(
 
   // First check ReTxBSR Timer because it is always configured
   // Decrement ReTxBSR Timer if it is running and not null
+#ifdef UE_NR_PHY_DEMO
+  // NR: update only on every new subframe (TTI0). To check later
+  if (isNewTxSubframe)
+#endif
+  {
 	  if ((UE_mac_inst[module_idP].scheduling_info.retxBSR_SF != MAC_UE_BSR_TIMER_NOT_RUNNING)
 			  && (UE_mac_inst[module_idP].scheduling_info.retxBSR_SF != 0)){
 		  UE_mac_inst[module_idP].scheduling_info.retxBSR_SF --;
@@ -2034,6 +2060,7 @@ ue_scheduler(
 				&& (UE_mac_inst[module_idP].scheduling_info.periodicBSR_SF != 0)){
 			UE_mac_inst[module_idP].scheduling_info.periodicBSR_SF--;
 		}
+  }
 
   //Check whether Regular BSR is triggered
   if (update_bsr(module_idP,txFrameP, txSubframeP,eNB_indexP) == TRUE) {
@@ -2077,7 +2104,14 @@ ue_scheduler(
     if (UE_mac_inst[module_idP].PHR_reconfigured == 1) { // upon (re)configuration of the power headroom reporting functionality by upper layers
       UE_mac_inst[module_idP].PHR_reporting_active = 1;
       UE_mac_inst[module_idP].PHR_reconfigured = 0;
-    } else {
+    }
+#ifdef UE_NR_PHY_DEMO
+    // NR: Only check Power headroom and update PHR timers every subframe. To check
+    else if (isNewTxSubframe)
+#else
+    else
+#endif
+    {
       //LOG_D(MAC,"PHR normal operation %d active %d \n", UE_mac_inst[module_idP].scheduling_info.periodicPHR_SF, UE_mac_inst[module_idP].PHR_reporting_active);
       if ((UE_mac_inst[module_idP].scheduling_info.prohibitPHR_SF <= 0) &&
           ((mac_xface->get_PL(module_idP,0,eNB_indexP) <  UE_mac_inst[module_idP].scheduling_info.PathlossChange_db) ||