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PUCCH power control state.

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This commit is contained in:
Bartosz Podrygajlo
2024-06-04 12:04:12 +02:00
parent a1902a03f8
commit 760e0aaae4
5 changed files with 213 additions and 184 deletions
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openair2/LAYER2/NR_MAC_UE/mac_defs.h
+3 -1
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@@ -577,7 +577,9 @@ typedef struct NR_UE_MAC_INST_s {
//SIDELINK MAC PARAMETERS
sl_nr_ue_mac_params_t *SL_MAC_PARAMS;
// PUCCH closed loop power control state
int G_b_f_c;
bool pucch_power_control_initialized;
} NR_UE_MAC_INST_t;
/*@}*/
openair2/LAYER2/NR_MAC_UE/mac_proto.h
+4 -8
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@@ -217,14 +217,8 @@ int16_t get_pucch_tx_power_ue(NR_UE_MAC_INST_t *mac,
uint8_t add_dmrs_flag,
uint8_t N_symb_PUCCH,
int subframe_number,
int O_uci);
int get_deltatf(uint16_t nb_of_prbs,
uint8_t N_symb_PUCCH,
uint8_t freq_hop_flag,
uint8_t add_dmrs_flag,
int N_sc_ctrl_RB,
int O_UCI);
int O_uci,
uint16_t start_prb);
int nr_ue_configure_pucch(NR_UE_MAC_INST_t *mac,
int slot,
@@ -235,6 +229,8 @@ int nr_ue_configure_pucch(NR_UE_MAC_INST_t *mac,
int nr_get_Pcmax(NR_UE_MAC_INST_t *mac, int Qm, bool powerBoostPi2BPSK, int scs, int N_RB_UL, bool is_transform_precoding, int n_prbs, int start_prb);
int get_sum_delta_pucch(NR_UE_MAC_INST_t *mac, int slot, frame_t frame);
/* Random Access */
/* \brief This function schedules the PRACH according to prach_ConfigurationIndex and TS 38.211 tables 6.3.3.2.x
openair2/LAYER2/NR_MAC_UE/main_ue_nr.c
+2
View File
@@ -82,6 +82,8 @@ void nr_ue_init_mac(NR_UE_MAC_INST_t *mac)
for (int i = 0; i < NR_MAX_SR_ID; i++)
memset(&mac->scheduling_info.sr_info[i], 0, sizeof(mac->scheduling_info.sr_info[i]));
mac->pucch_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
+202
View File
@@ -31,6 +31,40 @@
#include "LAYER2/NR_MAC_UE/mac_proto.h"
#define DEFAULT_P0_NOMINAL_PUCCH_0_DBM 0
#define DEFAULT_DELTA_F_PUCCH_0_DB 0
// TODO: This should be part of mac instance
/* TS 38.213 9.2.5.2 UE procedure for multiplexing HARQ-ACK/SR and CSI in a PUCCH */
/* this is a counter of number of pucch format 4 per subframe */
static int nb_pucch_format_4_in_subframes[LTE_NUMBER_OF_SUBFRAMES_PER_FRAME] = {0};
/* TS 38.211 Table 6.4.1.3.3.2-1: DM-RS positions for PUCCH format 3 and 4 */
static const int nb_symbols_excluding_dmrs[11][2][2]
= {
/* No additional DMRS Additional DMRS */
/* PUCCH length No hopping hopping No hopping hopping */
/* index 0 1 0 1 */
/* 4 */ {{ 3 , 2 } , { 3 , 2 }},
/* 5 */ {{ 3 , 3 } , { 3 , 3 }},
/* 6 */ {{ 4 , 4 } , { 4 , 4 }},
/* 7 */ {{ 5 , 5 } , { 5 , 5 }},
/* 8 */ {{ 6 , 6 } , { 6 , 6 }},
/* 9 */ {{ 7 , 7 } , { 7 , 7 }},
/* 10 */ {{ 8 , 8 } , { 6 , 6 }},
/* 11 */ {{ 9 , 9 } , { 7 , 7 }},
/* 12 */ {{ 10 , 10 } , { 8 , 8 }},
/* 13 */ {{ 11 , 11 } , { 9 , 9 }},
/* 14 */ {{ 12 , 12 } , { 10 , 10 }},
};
static int get_deltatf(uint16_t nb_of_prbs,
uint8_t N_symb_PUCCH,
uint8_t freq_hop_flag,
uint8_t add_dmrs_flag,
int N_sc_ctrl_RB,
int O_UCI);
// Implementation of 6.2.4 Configured ransmitted power
// 3GPP TS 38.101-1 version 16.5.0 Release 16
// -
@@ -156,3 +190,171 @@ int nr_get_Pcmax(NR_UE_MAC_INST_t *mac, int Qm, bool powerBoostPi2BPSK, int scs,
}
}
// This is not entirely correct. In certain k2/k1/k0 settings we might postpone accumulating delta_PUCCH until next HARQ feedback
// slot. The correct way to do this would be to calculate the K_PUCCH (delta_PUCCH summation window end) for each PUCCH occasion and
// compare PUCCH transmission symbol with the reception symbol of the DCI containing delta_PUCCH to determine if the delta_PUCCH
// should be added at each occasion.
int get_sum_delta_pucch(NR_UE_MAC_INST_t *mac, int slot, frame_t frame)
{
int delta_tpc_sum = 0;
for (int i = 0; i < NR_MAX_HARQ_PROCESSES; i++) {
if (mac->dl_harq_info[i].active && mac->dl_harq_info[i].ul_slot == slot && mac->dl_harq_info[i].ul_frame == frame) {
delta_tpc_sum += mac->dl_harq_info[i].delta_pucch;
mac->dl_harq_info[i].delta_pucch = 0;
}
}
return delta_tpc_sum;
}
// PUCCH Power control according to 38.213 section 7.2.1
int16_t get_pucch_tx_power_ue(NR_UE_MAC_INST_t *mac,
int scs,
NR_PUCCH_Config_t *pucch_Config,
int sum_delta_pucch,
uint8_t format_type,
uint16_t nb_of_prbs,
uint8_t freq_hop_flag,
uint8_t add_dmrs_flag,
uint8_t N_symb_PUCCH,
int subframe_number,
int O_uci,
uint16_t start_prb)
{
NR_UE_UL_BWP_t *current_UL_BWP = mac->current_UL_BWP;
AssertFatal(current_UL_BWP && current_UL_BWP->pucch_ConfigCommon,
"Missing configuration: need UL_BWP and pucch_ConfigCommon to calculate PUCCH tx power\n");
int PUCCH_POWER_DEFAULT = 0;
// p0_nominal is optional
int16_t P_O_NOMINAL_PUCCH = DEFAULT_P0_NOMINAL_PUCCH_0_DBM;
if (current_UL_BWP->pucch_ConfigCommon->p0_nominal != NULL) {
P_O_NOMINAL_PUCCH = *current_UL_BWP->pucch_ConfigCommon->p0_nominal;
}
struct NR_PUCCH_PowerControl *power_config = pucch_Config ? pucch_Config->pucch_PowerControl : NULL;
if (!power_config)
return (PUCCH_POWER_DEFAULT);
int16_t P_O_UE_PUCCH = 0;
if (pucch_Config->spatialRelationInfoToAddModList != NULL) { /* FFS TODO NR */
LOG_D(MAC,"PUCCH Spatial relation infos are not yet implemented\n");
return (PUCCH_POWER_DEFAULT);
}
int G_b_f_c = 0;
if (power_config->p0_Set != NULL) {
P_O_UE_PUCCH = power_config->p0_Set->list.array[0]->p0_PUCCH_Value; /* get from index 0 if no spatial relation set */
}
int P_O_PUCCH = P_O_NOMINAL_PUCCH + P_O_UE_PUCCH;
int16_t delta_F_PUCCH = DEFAULT_DELTA_F_PUCCH_0_DB;
long *delta_F_PUCCH_config = NULL;
int DELTA_TF;
uint16_t N_ref_PUCCH;
int N_sc_ctrl_RB = 0;
/* computing of pucch transmission power adjustment */
switch (format_type) {
case 0:
N_ref_PUCCH = 2;
DELTA_TF = 10 * log10(N_ref_PUCCH/N_symb_PUCCH);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f0;
break;
case 1:
N_ref_PUCCH = 14;
DELTA_TF = 10 * log10(N_ref_PUCCH/N_symb_PUCCH * O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f1;
break;
case 2:
N_sc_ctrl_RB = 10;
DELTA_TF = get_deltatf(nb_of_prbs, N_symb_PUCCH, freq_hop_flag, add_dmrs_flag, N_sc_ctrl_RB, O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f2;
break;
case 3:
N_sc_ctrl_RB = 14;
DELTA_TF = get_deltatf(nb_of_prbs, N_symb_PUCCH, freq_hop_flag, add_dmrs_flag, N_sc_ctrl_RB, O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f3;
break;
case 4:
N_sc_ctrl_RB = 14/(nb_pucch_format_4_in_subframes[subframe_number]);
DELTA_TF = get_deltatf(nb_of_prbs, N_symb_PUCCH, freq_hop_flag, add_dmrs_flag, N_sc_ctrl_RB, O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f4;
break;
default:
{
LOG_E(MAC,"PUCCH unknown pucch format %d\n", format_type);
return (0);
}
}
if (delta_F_PUCCH_config != NULL) {
delta_F_PUCCH = *delta_F_PUCCH_config;
}
// PUCCH shall be as specified for QPSK modulated DFT-s-OFDM of equivalent RB allocation (38.101-1)
// TODO: P_CMAX for format 2
int P_CMAX = nr_get_Pcmax(mac, 2, false, mac->current_UL_BWP->scs, mac->current_UL_BWP->BWPSize, true, 1, start_prb);
int P_CMIN = -40; // TODO: minimum TX power, possibly 38.101-1 6.3.1
int16_t pathloss = compute_nr_SSB_PL(mac, mac->ssb_measurements.ssb_rsrp_dBm);
if (power_config->twoPUCCH_PC_AdjustmentStates && *power_config->twoPUCCH_PC_AdjustmentStates > 1) {
LOG_E(MAC,"PUCCH power control adjustment states with 2 states not yet implemented\n");
return (PUCCH_POWER_DEFAULT);
}
int M_pucch_component = (10 * log10((double)(pow(2,scs) * nb_of_prbs)));
int16_t pucch_power_without_g_pucch = P_O_PUCCH + M_pucch_component + pathloss + delta_F_PUCCH + DELTA_TF;
if (power_config->p0_Set == NULL) {
if (mac->pucch_power_control_initialized == false) {
// Initialize power control state
// Assuming only sending on PCell
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_PUCCH + pathloss + delta_F_PUCCH + DELTA_TF + sum_delta_pucch);
DELTA_P_rampup = max(min(0, DELTA_P_rampup), DELTA_P_rampup_requested);
mac->G_b_f_c = DELTA_P_rampup + sum_delta_pucch;
mac->pucch_power_control_initialized = true;
}
else {
// PUCCH closed loop power control state
G_b_f_c = mac->G_b_f_c;
if (!((pucch_power_without_g_pucch + G_b_f_c >= P_CMAX && sum_delta_pucch > 0) ||
(pucch_power_without_g_pucch + G_b_f_c <= P_CMIN && sum_delta_pucch < 0))) {
G_b_f_c += sum_delta_pucch;
}
mac->G_b_f_c = G_b_f_c;
}
}
int pucch_power = min(P_CMAX, pucch_power_without_g_pucch + G_b_f_c);
LOG_D(MAC, "PUCCH ( Tx power : %d dBm ) ( 10Log(...) : %d ) ( from Path Loss : %d ) ( delta_F_PUCCH : %d ) ( DELTA_TF : %d ) ( G_b_f_c : %d ) \n",
pucch_power, M_pucch_component, pathloss, delta_F_PUCCH, DELTA_TF, G_b_f_c);
return pucch_power;
}
static int get_deltatf(uint16_t nb_of_prbs,
uint8_t N_symb_PUCCH,
uint8_t freq_hop_flag,
uint8_t add_dmrs_flag,
int N_sc_ctrl_RB,
int O_UCI)
{
int DELTA_TF;
int O_CRC = compute_pucch_crc_size(O_UCI);
int N_symb = N_symb_PUCCH < 4 ? N_symb_PUCCH : nb_symbols_excluding_dmrs[N_symb_PUCCH - 4][add_dmrs_flag][freq_hop_flag];
float N_RE = nb_of_prbs * N_sc_ctrl_RB * N_symb;
float K1 = 6;
if (O_UCI + O_CRC < 12)
DELTA_TF = 10 * log10((double)(((K1 * (O_UCI)) / N_RE)));
else {
float K2 = 2.4;
float BPRE = (O_UCI + O_CRC) / N_RE;
DELTA_TF = 10 * log10((double)(pow(2, (K2 * BPRE)) - 1));
}
return DELTA_TF;
}
openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
+2 -175
View File
@@ -58,18 +58,11 @@
#include "common/utils/LOG/log.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#define DEFAULT_P0_NOMINAL_PUCCH_0_DBM 0
#define DEFAULT_DELTA_F_PUCCH_0_DB 0
// #define DEBUG_MIB
// #define ENABLE_MAC_PAYLOAD_DEBUG 1
// #define DEBUG_RAR
extern uint32_t N_RB_DL;
/* TS 38.213 9.2.5.2 UE procedure for multiplexing HARQ-ACK/SR and CSI in a PUCCH */
/* this is a counter of number of pucch format 4 per subframe */
static int nb_pucch_format_4_in_subframes[LTE_NUMBER_OF_SUBFRAMES_PER_FRAME] = { 0 } ;
/* TS 36.213 Table 9.2.3-3: Mapping of values for one HARQ-ACK bit to sequences */
static const int sequence_cyclic_shift_1_harq_ack_bit[2]
/* HARQ-ACK Value 0 1 */
@@ -104,7 +97,6 @@ random-access procedure
@returns timing advance or 0xffff if preamble doesn't match
*/
static void nr_ue_process_rar(NR_UE_MAC_INST_t *mac, nr_downlink_indication_t *dl_info, int pdu_id);
int get_sum_delta_pucch(NR_UE_MAC_INST_t *mac, int slot, frame_t frame);
int get_pucch0_mcs(const int O_ACK, const int O_SR, const int ack_payload, const int sr_payload)
{
@@ -127,25 +119,6 @@ int get_pucch0_mcs(const int O_ACK, const int O_SR, const int ack_payload, const
return mcs;
}
/* TS 38.211 Table 6.4.1.3.3.2-1: DM-RS positions for PUCCH format 3 and 4 */
static const int nb_symbols_excluding_dmrs[11][2][2]
= {
/* No additional DMRS Additional DMRS */
/* PUCCH length No hopping hopping No hopping hopping */
/* index 0 1 0 1 */
/* 4 */ {{ 3 , 2 } , { 3 , 2 }},
/* 5 */ {{ 3 , 3 } , { 3 , 3 }},
/* 6 */ {{ 4 , 4 } , { 4 , 4 }},
/* 7 */ {{ 5 , 5 } , { 5 , 5 }},
/* 8 */ {{ 6 , 6 } , { 6 , 6 }},
/* 9 */ {{ 7 , 7 } , { 7 , 7 }},
/* 10 */ {{ 8 , 8 } , { 6 , 6 }},
/* 11 */ {{ 9 , 9 } , { 7 , 7 }},
/* 12 */ {{ 10 , 10 } , { 8 , 8 }},
/* 13 */ {{ 11 , 11 } , { 9 , 9 }},
/* 14 */ {{ 12 , 12 } , { 10 , 10 }},
};
/* TS 36.213 Table 9.2.1-1: PUCCH resource sets before dedicated PUCCH resource configuration */
const initial_pucch_resource_t initial_pucch_resource[16] = {
/* format first symbol Number of symbols PRB offset nb index for set of initial CS */
@@ -1395,8 +1368,6 @@ int nr_ue_configure_pucch(NR_UE_MAC_INST_t *mac,
const int scs = current_UL_BWP->scs;
int subframe_number = slot / (nr_slots_per_frame[scs]/10);
nb_pucch_format_4_in_subframes[subframe_number] = 0;
pucch_pdu->rnti = rnti;
LOG_D(NR_MAC, "initial_pucch_id %d, pucch_resource %p\n", pucch->initial_pucch_id, pucch->pucch_resource);
@@ -1593,7 +1564,8 @@ int nr_ue_configure_pucch(NR_UE_MAC_INST_t *mac,
pucch_pdu->add_dmrs_flag,
pucch_pdu->nr_of_symbols,
subframe_number,
n_uci);
n_uci,
pucch_pdu->prb_start);
} else {
LOG_E(NR_MAC, "problem with pucch configuration\n");
return -1;
@@ -1629,135 +1601,6 @@ int nr_ue_configure_pucch(NR_UE_MAC_INST_t *mac,
return 0;
}
// PUCCH Power control according to 38.213 section 7.2.1
int16_t get_pucch_tx_power_ue(NR_UE_MAC_INST_t *mac,
int scs,
NR_PUCCH_Config_t *pucch_Config,
int sum_delta_pucch,
uint8_t format_type,
uint16_t nb_of_prbs,
uint8_t freq_hop_flag,
uint8_t add_dmrs_flag,
uint8_t N_symb_PUCCH,
int subframe_number,
int O_uci)
{
NR_UE_UL_BWP_t *current_UL_BWP = mac->current_UL_BWP;
AssertFatal(current_UL_BWP && current_UL_BWP->pucch_ConfigCommon,
"Missing configuration: need UL_BWP and pucch_ConfigCommon to calculate PUCCH tx power\n");
int PUCCH_POWER_DEFAULT = 0;
// p0_nominal is optional
int16_t P_O_NOMINAL_PUCCH = DEFAULT_P0_NOMINAL_PUCCH_0_DBM;
if (current_UL_BWP->pucch_ConfigCommon->p0_nominal != NULL) {
P_O_NOMINAL_PUCCH = *current_UL_BWP->pucch_ConfigCommon->p0_nominal;
}
struct NR_PUCCH_PowerControl *power_config = pucch_Config ? pucch_Config->pucch_PowerControl : NULL;
if (!power_config)
return (PUCCH_POWER_DEFAULT);
int16_t P_O_UE_PUCCH;
int16_t G_b_f_c = 0;
if (pucch_Config->spatialRelationInfoToAddModList != NULL) { /* FFS TODO NR */
LOG_D(MAC,"PUCCH Spatial relation infos are not yet implemented\n");
return (PUCCH_POWER_DEFAULT);
}
if (power_config->p0_Set != NULL) {
P_O_UE_PUCCH = power_config->p0_Set->list.array[0]->p0_PUCCH_Value; /* get from index 0 if no spatial relation set */
G_b_f_c = 0;
}
else {
G_b_f_c = sum_delta_pucch;
LOG_E(MAC,"PUCCH Transmit power control command not yet implemented for NR\n");
return (PUCCH_POWER_DEFAULT);
}
int P_O_PUCCH = P_O_NOMINAL_PUCCH + P_O_UE_PUCCH;
int16_t delta_F_PUCCH = DEFAULT_DELTA_F_PUCCH_0_DB;
long *delta_F_PUCCH_config = NULL;
int DELTA_TF;
uint16_t N_ref_PUCCH;
int N_sc_ctrl_RB = 0;
/* computing of pucch transmission power adjustment */
switch (format_type) {
case 0:
N_ref_PUCCH = 2;
DELTA_TF = 10 * log10(N_ref_PUCCH/N_symb_PUCCH);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f0;
break;
case 1:
N_ref_PUCCH = 14;
DELTA_TF = 10 * log10(N_ref_PUCCH/N_symb_PUCCH * O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f1;
break;
case 2:
N_sc_ctrl_RB = 10;
DELTA_TF = get_deltatf(nb_of_prbs, N_symb_PUCCH, freq_hop_flag, add_dmrs_flag, N_sc_ctrl_RB, O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f2;
break;
case 3:
N_sc_ctrl_RB = 14;
DELTA_TF = get_deltatf(nb_of_prbs, N_symb_PUCCH, freq_hop_flag, add_dmrs_flag, N_sc_ctrl_RB, O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f3;
break;
case 4:
N_sc_ctrl_RB = 14/(nb_pucch_format_4_in_subframes[subframe_number]);
DELTA_TF = get_deltatf(nb_of_prbs, N_symb_PUCCH, freq_hop_flag, add_dmrs_flag, N_sc_ctrl_RB, O_uci);
delta_F_PUCCH_config = power_config->deltaF_PUCCH_f4;
break;
default:
{
LOG_E(MAC,"PUCCH unknown pucch format %d\n", format_type);
return (0);
}
}
if (delta_F_PUCCH_config != NULL) {
delta_F_PUCCH = *delta_F_PUCCH_config;
}
if (power_config->twoPUCCH_PC_AdjustmentStates && *power_config->twoPUCCH_PC_AdjustmentStates > 1) {
LOG_E(MAC,"PUCCH power control adjustment states with 2 states not yet implemented\n");
return (PUCCH_POWER_DEFAULT);
}
int16_t pathloss = compute_nr_SSB_PL(mac, mac->ssb_measurements.ssb_rsrp_dBm);
int M_pucch_component = (10 * log10((double)(pow(2,scs) * nb_of_prbs)));
int16_t pucch_power = P_O_PUCCH + M_pucch_component + pathloss + delta_F_PUCCH + DELTA_TF + G_b_f_c;
LOG_D(MAC, "PUCCH ( Tx power : %d dBm ) ( 10Log(...) : %d ) ( from Path Loss : %d ) ( delta_F_PUCCH : %d ) ( DELTA_TF : %d ) ( G_b_f_c : %d ) \n",
pucch_power, M_pucch_component, pathloss, delta_F_PUCCH, DELTA_TF, G_b_f_c);
return (pucch_power);
}
int get_deltatf(uint16_t nb_of_prbs,
uint8_t N_symb_PUCCH,
uint8_t freq_hop_flag,
uint8_t add_dmrs_flag,
int N_sc_ctrl_RB,
int O_UCI)
{
int DELTA_TF;
int O_CRC = compute_pucch_crc_size(O_UCI);
int N_symb = N_symb_PUCCH < 4 ? N_symb_PUCCH : nb_symbols_excluding_dmrs[N_symb_PUCCH - 4][add_dmrs_flag][freq_hop_flag];
float N_RE = nb_of_prbs * N_sc_ctrl_RB * N_symb;
float K1 = 6;
if (O_UCI + O_CRC < 12)
DELTA_TF = 10 * log10((double)(((K1 * (O_UCI)) / N_RE)));
else {
float K2 = 2.4;
float BPRE = (O_UCI + O_CRC) / N_RE;
DELTA_TF = 10 * log10((double)(pow(2,(K2*BPRE)) - 1));
}
return DELTA_TF;
}
static int find_pucch_resource_set(NR_PUCCH_Config_t *pucch_Config, int size)
{
// Procedure described in 38.213 Section 9.2.1
@@ -4068,19 +3911,3 @@ int16_t compute_nr_SSB_PL(NR_UE_MAC_INST_t *mac, short ssb_rsrp_dBm)
return pathloss;
}
// This is not entirely correct. In certain k2/k1/k0 settings we might postpone accumulating delta_PUCCH until next HARQ feedback
// slot. The correct way to do this would be to calculate the K_PUCCH (delta_PUCCH summation window end) for each PUCCH occasion and
// compare PUCCH transmission symbol with the reception symbol of the DCI containing delta_PUCCH to determine if the delta_PUCCH
// should be added at each occasion.
int get_sum_delta_pucch(NR_UE_MAC_INST_t *mac, int slot, frame_t frame)
{
int delta_tpc_sum = 0;
for (int i = 0; i < NR_MAX_HARQ_PROCESSES; i++) {
if (mac->dl_harq_info[i].active && mac->dl_harq_info[i].ul_slot == slot && mac->dl_harq_info[i].ul_frame == frame) {
delta_tpc_sum += mac->dl_harq_info[i].delta_pucch;
mac->dl_harq_info[i].delta_pucch = 0;
}
}
return delta_tpc_sum;
}