PDCCH optimisation to read only the DCI / agregation we have preconfigured

openair1/PHY/INIT/lte_init.c

@@ -764,6 +764,7 @@ void phy_config_dedicated_ue(uint8_t Mod_id,int CC_id,uint8_t eNB_id,
                              struct PhysicalConfigDedicated *physicalConfigDedicated )
 {
 
+  static uint8_t first_dedicated_configuration = 0;
   PHY_VARS_UE *phy_vars_ue = PHY_vars_UE_g[Mod_id][CC_id];
 
   phy_vars_ue->total_TBS[eNB_id]=0;
@@ -954,9 +955,13 @@ void phy_config_dedicated_ue(uint8_t Mod_id,int CC_id,uint8_t eNB_id,
   get_cqipmiri_params(phy_vars_ue,eNB_id);
 
   // disable MIB SIB decoding once we are on connected mode
-  LOG_I(PHY,"Disabling SIB MIB decoding \n");
+  first_dedicated_configuration ++;
+  if(first_dedicated_configuration > 1)
+  {
+  	LOG_I(PHY,"Disable SIB MIB decoding \n");
   	phy_vars_ue->decode_SIB = 0;
   	phy_vars_ue->decode_MIB = 0;
+  }
   //phy_vars_ue->pdcch_vars[1][eNB_id]->crnti = phy_vars_ue->pdcch_vars[0][eNB_id]->crnti;
   if(phy_vars_ue->pdcch_vars[0][eNB_id]->crnti == 0x1234)
       phy_vars_ue->pdcch_vars[0][eNB_id]->crnti = phy_vars_ue->pdcch_vars[1][eNB_id]->crnti;

openair1/PHY/defs.h

@@ -75,6 +75,9 @@
 
 #define RX_NB_TH_MAX 2
 #define RX_NB_TH 2
+extern uint8_t dciFormat;
+extern uint8_t agregationLevel;
+
 
 //#ifdef SHRLIBDEV
 //extern int rxrescale;

openair1/PHY/vars.h

@@ -78,6 +78,9 @@ unsigned char NB_INST=0;
 unsigned int ULSCH_max_consecutive_errors = 20;
 
 int number_of_cards;
+uint8_t dciFormat;
+uint8_t agregationLevel;
+
 
 int flag_LA=0;
 int flagMag;

openair1/SCHED/phy_procedures_lte_ue.c

@@ -3083,11 +3083,37 @@ int ue_pdcch_procedures(uint8_t eNB_id,PHY_VARS_UE *ue,UE_rxtx_proc_t *proc,uint
 
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RX_PDCCH, VCD_FUNCTION_OUT);
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DCI_DECODING, VCD_FUNCTION_IN);
+
+    start_meas(&ue->dlsch_decoding_stats[subframe_rx]);
+
+    //printf("Decode SIB frame param agregation + DCI %d %d \n",agregationLevel,dciFormat);
+
+    //agregation level == FF means no configuration on
+    if(agregationLevel == 0xFF || ue->decode_SIB)
+    {
+        // search all possible dcis
         dci_cnt = dci_decoding_procedure(ue,
                 dci_alloc_rx,
                 (ue->UE_mode[eNB_id] < PUSCH)? 1 : 0,  // if we're in PUSCH don't listen to common search space,
                                                        // later when we need paging or RA during connection, update this ...
                 eNB_id,subframe_rx);
+    }
+    else
+    {
+        // search only preconfigured dcis
+        // search C RNTI dci
+        dci_cnt = dci_CRNTI_decoding_procedure(ue,
+                dci_alloc_rx,
+                dciFormat,
+                agregationLevel,
+                eNB_id,
+                subframe_rx);
+    }
+
+    stop_meas(&ue->dlsch_decoding_stats[subframe_rx]);
+    printf("subframe_rx %d dci_decoding procedure %5.3f\n",
+         subframe_rx,
+         (ue->dlsch_unscrambling_stats.p_time)/(cpuf*1000.0));
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DCI_DECODING, VCD_FUNCTION_OUT);
     //LOG_D(PHY,"[UE  %d][PUSCH] Frame %d subframe %d PHICH RX\n",ue->Mod_id,frame_rx,subframe_rx);
 

targets/RT/USER/lte-softmodem.c

@@ -150,6 +150,9 @@ int chain_offset=0;
 int phy_test = 0;
 uint8_t usim_test = 0;
 
+uint8_t dci_Format = 0;
+uint8_t agregation_Level =0xFF;
+
 uint8_t nb_antenna_tx = 1;
 uint8_t nb_antenna_rx = 1;
 
@@ -640,6 +643,8 @@ static void get_options (int argc, char **argv) {
         LONG_OPTION_THREADONESUBFRAME,
         LONG_OPTION_THREADTWOSUBFRAME,
         LONG_OPTION_THREADTHREESUBFRAME,
+        LONG_OPTION_DCIFORMAT,
+        LONG_OPTION_AGREGATIONLEVEL,
         LONG_OPTION_DEMOD_SHIFT,
 #if T_TRACER
         LONG_OPTION_T_PORT,
@@ -677,6 +682,8 @@ static void get_options (int argc, char **argv) {
         {"threadOneSubframe",  required_argument, NULL, LONG_OPTION_THREADONESUBFRAME},
         {"threadTwoSubframe",  required_argument, NULL, LONG_OPTION_THREADTWOSUBFRAME},
         {"threadThreeSubframe",  required_argument, NULL, LONG_OPTION_THREADTHREESUBFRAME},
+        {"DCIformat",  required_argument, NULL, LONG_OPTION_DCIFORMAT},
+        {"AgregationLevel",  required_argument, NULL, LONG_OPTION_AGREGATIONLEVEL},
         {"dlsch-demod-shift", required_argument,  NULL, LONG_OPTION_DEMOD_SHIFT},
 #if T_TRACER
         {"T_port",                 required_argument, 0, LONG_OPTION_T_PORT},
@@ -811,6 +818,12 @@ static void get_options (int argc, char **argv) {
     case LONG_OPTION_THREADTHREESUBFRAME:
        threads.three=atoi(optarg);
     break;
+    case LONG_OPTION_DCIFORMAT:
+        dci_Format = atoi(optarg);
+       break;
+    case LONG_OPTION_AGREGATIONLEVEL:
+        agregation_Level = atoi(optarg);
+        break;
     case LONG_OPTION_DEMOD_SHIFT: {
         extern int16_t dlsch_demod_shift;
         dlsch_demod_shift = atof(optarg);
@@ -1560,6 +1573,11 @@ int main( int argc, char **argv ) {
         NB_UE_INST=1;
         NB_INST=1;
 
+        dciFormat     = dci_Format;
+        agregationLevel     = agregation_Level;
+
+        LOG_I(PHY,"Set dciFormat %d , agregationLevel %d \n",dciFormat, agregationLevel);
+
         PHY_vars_UE_g = malloc(sizeof(PHY_VARS_UE**));
         PHY_vars_UE_g[0] = malloc(sizeof(PHY_VARS_UE*)*MAX_NUM_CCs);