PUSCH power control state

nfapi/open-nFAPI/nfapi/public_inc/fapi_nr_ue_interface.h

@@ -359,7 +359,6 @@ typedef struct
   //beamforming
   nfapi_nr_ue_ul_beamforming_t beamforming;
   //OAI specific
-  int8_t absolute_delta_PUSCH;
   int16_t tx_power;
   fapi_nr_tx_request_body_t tx_request_body;
 } nfapi_nr_ue_pusch_pdu_t;

openair1/SIMULATION/NR_PHY/ulsim.c

@@ -1119,7 +1119,6 @@ int main(int argc, char *argv[])
         pusch_config_pdu->num_dmrs_cdm_grps_no_data = num_dmrs_cdm_grps_no_data;
         pusch_config_pdu->nrOfLayers = precod_nbr_layers;
         pusch_config_pdu->dmrs_ports = ((1 << precod_nbr_layers) - 1);
-        pusch_config_pdu->absolute_delta_PUSCH = 0;
         pusch_config_pdu->target_code_rate = code_rate;
         pusch_config_pdu->tbslbrm = tbslbrm;
         pusch_config_pdu->ldpcBaseGraph = get_BG(TBS, code_rate);

openair2/LAYER2/NR_MAC_UE/mac_defs.h

@@ -593,6 +593,8 @@ typedef struct NR_UE_MAC_INST_s {
   // PUCCH closed loop power control state
   int G_b_f_c;
   bool pucch_power_control_initialized;
+  int f_b_f_c;
+  bool pusch_power_control_initialized;
 } NR_UE_MAC_INST_t;
 
 /*@}*/

openair2/LAYER2/NR_MAC_UE/main_ue_nr.c

@@ -84,6 +84,7 @@ void nr_ue_init_mac(NR_UE_MAC_INST_t *mac)
     memset(&mac->scheduling_info.sr_info[i], 0, sizeof(mac->scheduling_info.sr_info[i]));
 
   mac->pucch_power_control_initialized = false;
+  mac->pusch_power_control_initialized = false;
 }
 
 void nr_ue_mac_default_configs(NR_UE_MAC_INST_t *mac)

openair2/LAYER2/NR_MAC_UE/nr_ue_power_procedures.c

@@ -553,12 +553,28 @@ int get_pusch_tx_power_ue(NR_UE_MAC_INST_t *mac,
 
   // TODO: compute pathoss using correct reference
   int16_t pathloss = compute_nr_SSB_PL(mac, mac->ssb_measurements.ssb_rsrp_dBm);
+  int P_CMIN = nr_get_Pcmin(mac->current_UL_BWP->scs, mac->nr_band,  mac->current_UL_BWP->BWPSize);
+
+  float pusch_power_without_f_b_f_c = P_O_PUSCH + M_pusch_component + alpha * pathloss + DELTA_TF;
 
   int f_b_f_c = 0;
   if (has_pusch_power_control_config && pusch_Config->pusch_PowerControl->tpc_Accumulation) {
     f_b_f_c = delta_pusch;
   } else {
-    // TODO: PUSCH power control state
+    if (!mac->pusch_power_control_initialized && is_rar_tx_retx) {
+      NR_PRACH_RESOURCES_t* prach_resources = &mac->ra.prach_resources;
+      float DELTA_P_rampup_requested = (prach_resources->RA_PREAMBLE_POWER_RAMPING_COUNTER - 1) * prach_resources->RA_PREAMBLE_POWER_RAMPING_STEP;
+      float DELTA_P_rampup = P_CMAX - (P_O_PUSCH + M_pusch_component + alpha * pathloss + DELTA_TF + delta_pusch);
+      DELTA_P_rampup = min(DELTA_P_rampup_requested, max(0, DELTA_P_rampup));
+      mac->f_b_f_c = DELTA_P_rampup + delta_pusch;
+      mac->pusch_power_control_initialized = true;
+    } else {
+      if (!((pusch_power_without_f_b_f_c + mac->f_b_f_c >= P_CMAX && delta_pusch > 0) ||
+        (pusch_power_without_f_b_f_c + mac->f_b_f_c <= P_CMIN && delta_pusch < 0))) {
+        mac->f_b_f_c += delta_pusch;
+      }
+    }
+    f_b_f_c = mac->f_b_f_c;
   }
   LOG_D(NR_MAC,
         "PUSCH tx power components P_O_PUSCH=%d, M_pusch_component=%d, alpha*pathloss=%f, delta_TF=%f, f_b_f_c=%d\n",

openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c

@@ -793,20 +793,6 @@ int nr_config_pusch_pdu(NR_UE_MAC_INST_t *mac,
     pusch_config_pdu->pusch_data.rv_index = dci->rv;
     /* HARQ_PROCESS_NUMBER */
     pusch_config_pdu->pusch_data.harq_process_id = dci->harq_pid;
-    /* TPC_PUSCH */
-    // according to TS 38.213 Table Table 7.1.1-1
-    if (dci->tpc == 0) {
-      pusch_config_pdu->absolute_delta_PUSCH = -4;
-    }
-    if (dci->tpc == 1) {
-      pusch_config_pdu->absolute_delta_PUSCH = -1;
-    }
-    if (dci->tpc == 2) {
-      pusch_config_pdu->absolute_delta_PUSCH = 1;
-    }
-    if (dci->tpc == 3) {
-      pusch_config_pdu->absolute_delta_PUSCH = 4;
-    }
 
     if (NR_DMRS_ulconfig != NULL)
       add_pos = (NR_DMRS_ulconfig->dmrs_AdditionalPosition == NULL) ? 2 : *NR_DMRS_ulconfig->dmrs_AdditionalPosition;
@@ -913,6 +899,22 @@ int nr_config_pusch_pdu(NR_UE_MAC_INST_t *mac,
     pusch_config_pdu->pusch_data.tb_size = mac->ul_harq_info[pid].TBS;
   }
 
+  /* TPC_PUSCH */
+  int delta_pusch = 0;
+  if (dci) {
+    bool stateless_pusch_power_control = mac->current_UL_BWP->pusch_Config != NULL
+                                        && mac->current_UL_BWP->pusch_Config->pusch_PowerControl != NULL
+                                        && mac->current_UL_BWP->pusch_Config->pusch_PowerControl->tpc_Accumulation != NULL;
+    int table_38_213_7_1_1_1[2][4] = {{-1, 0, 1, 3}, {-4, -1, 1, 4}};
+    if (stateless_pusch_power_control) {
+      delta_pusch = table_38_213_7_1_1_1[1][dci->tpc];
+    } else {
+      // TODO: This is not entirely correct. In case there is a prevously scheduled PUSCH for a future slot
+      // we should apply its TPC now.
+      delta_pusch = table_38_213_7_1_1_1[0][dci->tpc];
+    }
+  }
+
   bool is_rar_tx_retx = rnti_type == TYPE_TC_RNTI_;
 
   pusch_config_pdu->tx_power = get_pusch_tx_power_ue(mac,
@@ -925,7 +927,7 @@ int nr_config_pusch_pdu(NR_UE_MAC_INST_t *mac,
                                                      pusch_config_pdu->target_code_rate,
                                                      pusch_config_pdu->pusch_uci.beta_offset_csi1,
                                                      pusch_config_pdu->pusch_data.tb_size << 3,
-                                                     pusch_config_pdu->absolute_delta_PUSCH,
+                                                     delta_pusch,
                                                      is_rar_tx_retx,
                                                      pusch_config_pdu->transform_precoding);
 

openair2/LAYER2/NR_MAC_UE/tests/test_nr_ue_power_procedures.cpp

@@ -198,6 +198,7 @@ TEST(pusch_power_control, pusch_power_control_msg3)
   NR_PUSCH_PowerControl pusch_PowerControl = {0};
   pusch_Config.pusch_PowerControl = &pusch_PowerControl;
   pusch_PowerControl.tpc_Accumulation = (long*)1;
+  mac.pusch_power_control_initialized = true;
   mac.frame_type = TDD;
 
   // msg3 cofiguration as in 5g_rfsimulator testcase
@@ -358,6 +359,143 @@ TEST(pusch_power_control, pusch_power_data)
   EXPECT_EQ(power, P_CMAX) << "Expecting max tx power because of deltaMCS with CSI-only";
 }
 
+TEST(pusch_power_control, pusch_power_control_state_initialization)
+{
+  NR_UE_MAC_INST_t mac = {0};
+  NR_UE_UL_BWP_t current_UL_BWP = {0};
+  current_UL_BWP.scs = 1;
+  current_UL_BWP.BWPSize = 106;
+  mac.current_UL_BWP = &current_UL_BWP;
+  NR_RACH_ConfigCommon_t nr_rach_ConfigCommon = {0};
+  current_UL_BWP.rach_ConfigCommon = &nr_rach_ConfigCommon;
+  mac.nr_band = 78;
+  NR_PUSCH_Config_t pusch_Config = {0};
+  current_UL_BWP.pusch_Config = &pusch_Config;
+  NR_PUSCH_PowerControl pusch_PowerControl = {0};
+  pusch_Config.pusch_PowerControl = &pusch_PowerControl;
+  mac.pusch_power_control_initialized = false;
+
+  // msg3 cofiguration as in 5g_rfsimulator testcase
+  int num_rb = 8;
+  int start_prb = 0;
+  uint16_t nb_symb_sch = 3;
+  uint16_t nb_dmrs_prb = 12;
+  uint16_t nb_ptrs_prb = 0;
+  uint16_t Qm = 2;
+  uint16_t R = 1570;
+  uint16_t beta_offset_csi1 = 0;
+  uint32_t sum_bits_in_codeblocks = 56;
+  int delta_pusch = 0;
+  bool is_rar_tx_retx = true;
+  long preambleReceivedTargetPower = -96;
+  nr_rach_ConfigCommon.rach_ConfigGeneric.preambleReceivedTargetPower = preambleReceivedTargetPower;
+
+  get_pusch_tx_power_ue(&mac,
+                        num_rb,
+                        start_prb,
+                        nb_symb_sch,
+                        nb_dmrs_prb,
+                        nb_ptrs_prb,
+                        Qm,
+                        R,
+                        beta_offset_csi1,
+                        sum_bits_in_codeblocks,
+                        delta_pusch,
+                        is_rar_tx_retx,
+                        false);
+  EXPECT_EQ(mac.pusch_power_control_initialized, true);
+}
+
+TEST(pusch_power_control, pusch_power_control_state)
+{
+  NR_UE_MAC_INST_t mac = {0};
+  NR_UE_UL_BWP_t current_UL_BWP = {0};
+  current_UL_BWP.scs = 1;
+  current_UL_BWP.BWPSize = 106;
+  mac.current_UL_BWP = &current_UL_BWP;
+  NR_RACH_ConfigCommon_t nr_rach_ConfigCommon = {0};
+  current_UL_BWP.rach_ConfigCommon = &nr_rach_ConfigCommon;
+  mac.nr_band = 78;
+  mac.f_b_f_c = 0;
+  mac.pusch_power_control_initialized = true;
+
+  bool is_rar_tx_retx = false;
+  int num_rb = 5;
+  int start_prb = 0;
+  uint16_t nb_symb_sch = 3;
+  uint16_t nb_dmrs_prb = 6;
+  uint16_t nb_ptrs_prb = 0;
+  uint16_t Qm = 2;
+  uint16_t R = 6790;
+  uint16_t beta_offset_csi1 = 0;
+  uint32_t sum_bits_in_codeblocks = 192;
+  int delta_pusch = 1;
+  bool transform_precoding = false;
+  NR_PUSCH_Config_t pusch_Config = {0};
+  current_UL_BWP.pusch_Config = &pusch_Config;
+  NR_PUSCH_PowerControl pusch_PowerControl = {0};
+  pusch_Config.pusch_PowerControl = &pusch_PowerControl;
+  long p0_NominalWithGrant = 0;
+  current_UL_BWP.p0_NominalWithGrant = &p0_NominalWithGrant;
+  mac.frame_type = TDD;
+
+  int P_CMAX = nr_get_Pcmax(23, mac.nr_band, mac.frame_type, FR1, Qm, false, current_UL_BWP.scs, current_UL_BWP.BWPSize, transform_precoding, num_rb, start_prb);
+
+  int power = get_pusch_tx_power_ue(&mac,
+                                    num_rb,
+                                    start_prb,
+                                    nb_symb_sch,
+                                    nb_dmrs_prb,
+                                    nb_ptrs_prb,
+                                    Qm,
+                                    R,
+                                    beta_offset_csi1,
+                                    sum_bits_in_codeblocks,
+                                    delta_pusch,
+                                    is_rar_tx_retx,
+                                    transform_precoding);
+  EXPECT_LE(power, P_CMAX);
+  EXPECT_EQ(power, 11);
+  for (int i = 0; i < 20; i++) {
+    int increased_power = get_pusch_tx_power_ue(&mac,
+                                                num_rb,
+                                                start_prb,
+                                                nb_symb_sch,
+                                                nb_dmrs_prb,
+                                                nb_ptrs_prb,
+                                                Qm,
+                                                R,
+                                                beta_offset_csi1,
+                                                sum_bits_in_codeblocks,
+                                                delta_pusch,
+                                                is_rar_tx_retx,
+                                                transform_precoding);
+    EXPECT_GE(increased_power, power);
+    EXPECT_LE(increased_power, P_CMAX);
+    power = increased_power;
+  }
+
+  delta_pusch = -1;
+  for (int i = 0; i < 20; i++) {
+    int reduced_power = get_pusch_tx_power_ue(&mac,
+                                              num_rb,
+                                              start_prb,
+                                              nb_symb_sch,
+                                              nb_dmrs_prb,
+                                              nb_ptrs_prb,
+                                              Qm,
+                                              R,
+                                              beta_offset_csi1,
+                                              sum_bits_in_codeblocks,
+                                              delta_pusch,
+                                              is_rar_tx_retx,
+                                              transform_precoding);
+    EXPECT_LE(reduced_power, power);
+    EXPECT_LE(reduced_power, P_CMAX);
+    power = reduced_power;
+  }
+}
+
 int main(int argc, char** argv)
 {
   logInit();