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srsLTE
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Added periodic RI on PUCCH for TM3 and TM4

This commit is contained in:
Xavier Arteaga 2017-09-08 16:24:34 +02:00 committed by Ismael Gomez
parent 65f5987ea8
commit afd2bbbfc2
7 changed files with 58 additions and 14 deletions
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2
lib/examples/pdsch_ue.c
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@ -537,7 +537,7 @@ int main(int argc, char **argv) {
// Variables for measurements
uint32_t nframes=0;
uint32_t ri = 0, pmi = 0;
uint8_t ri = 0, pmi = 0;
float rsrp0=0.0, rsrp1=0.0, rsrq=0.0, noise=0.0, enodebrate = 0.0, uerate = 0.0,
sinr[SRSLTE_MAX_LAYERS][SRSLTE_MAX_CODEBOOKS], cn = 0.0;
bool decode_pdsch = false;

3
lib/include/srslte/phy/phch/cqi.h
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@ -41,11 +41,14 @@
#include "srslte/phy/common/phy_common.h"
#define SRSLTE_CQI_MAX_BITS 64
#define SRSLTE_DIF_CQI_MAX_BITS 3
#define SRSLTE_PMI_MAX_BITS 4
typedef struct {
bool configured;
uint32_t pmi_idx;
uint32_t ri_idx;
bool ri_idx_present;
bool simul_cqi_ack;
bool format_is_subband;
uint32_t subband_size;

4
lib/include/srslte/phy/phch/uci.h
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@ -64,6 +64,10 @@ typedef struct SRSLTE_API {
typedef struct SRSLTE_API {
uint8_t uci_cqi[SRSLTE_CQI_MAX_BITS];
uint32_t uci_cqi_len;
uint8_t uci_dif_cqi[SRSLTE_DIF_CQI_MAX_BITS];
uint32_t uci_dif_cqi_len;
uint8_t uci_pmi[SRSLTE_PMI_MAX_BITS];
uint8_t uci_pmi_len;
uint8_t uci_ri; // Only 1-bit supported for RI
uint32_t uci_ri_len;
uint8_t uci_ack; // 1st codeword bit for HARQ-ACK

4
lib/include/srslte/phy/ue/ue_dl.h
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@ -185,8 +185,8 @@ SRSLTE_API int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q,
bool acks[SRSLTE_MAX_CODEWORDS]);
SRSLTE_API int srslte_ue_dl_ri_pmi_select(srslte_ue_dl_t *q,
uint32_t *ri,
uint32_t *pmi,
uint8_t *ri,
uint8_t *pmi,
float *current_sinr);
SRSLTE_API int srslte_ue_dl_ri_select(srslte_ue_dl_t *q,

10
lib/src/phy/ue/ue_dl.c
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@ -511,10 +511,10 @@ int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q, cf_t *input[SRSLTE_MAX_PORTS],
/* Compute the Rank Indicator (RI) and Precoder Matrix Indicator (PMI) by computing the Signal to Interference plus
* Noise Ratio (SINR), valid for TM4 */
int srslte_ue_dl_ri_pmi_select(srslte_ue_dl_t *q, uint32_t *ri, uint32_t *pmi, float *current_sinr) {
int srslte_ue_dl_ri_pmi_select(srslte_ue_dl_t *q, uint8_t *ri, uint8_t *pmi, float *current_sinr) {
float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
float best_sinr = -INFINITY;
uint32_t best_pmi = 0, best_ri = 0;
uint8_t best_pmi = 0, best_ri = 0;
if (q->cell.nof_ports < 2 || q->nof_rx_antennas < 2) {
/* Do nothing */
@ -528,11 +528,11 @@ int srslte_ue_dl_ri_pmi_select(srslte_ue_dl_t *q, uint32_t *ri, uint32_t *pmi, f
/* Select the best Rank indicator (RI) and Precoding Matrix Indicator (PMI) */
for (uint32_t nof_layers = 1; nof_layers <= 2; nof_layers++) {
float _sinr = q->sinr[nof_layers - 1][q->pmi[nof_layers - 1]] * nof_layers;
float _sinr = q->sinr[nof_layers - 1][q->pmi[nof_layers - 1]] * nof_layers * nof_layers;
if (_sinr > best_sinr + 0.1) {
best_sinr = _sinr;
best_pmi = q->pmi[nof_layers - 1];
best_ri = nof_layers;
best_pmi = (uint8_t) q->pmi[nof_layers - 1];
best_ri = (uint8_t) (nof_layers - 1);
}
}

8
lib/src/phy/ue/ue_ul.c
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@ -269,6 +269,14 @@ void pucch_encode_bits(srslte_uci_data_t *uci_data, srslte_pucch_format_t format
pucch_bits[1] = uci_data->uci_ack_2; // this will be ignored in format 1a
}
if (format >= SRSLTE_PUCCH_FORMAT_2) {
/* Append Differential CQI */
memcpy(&uci_data->uci_cqi[uci_data->uci_cqi_len], uci_data->uci_dif_cqi, uci_data->uci_dif_cqi_len);
uci_data->uci_cqi_len += uci_data->uci_dif_cqi_len;
/* Append PMI */
memcpy(&uci_data->uci_cqi[uci_data->uci_cqi_len], uci_data->uci_pmi, uci_data->uci_pmi_len);
uci_data->uci_cqi_len += uci_data->uci_pmi_len;
srslte_uci_encode_cqi_pucch(uci_data->uci_cqi, uci_data->uci_cqi_len, pucch_bits);
if (format > SRSLTE_PUCCH_FORMAT_2) {
pucch2_bits[0] = uci_data->uci_ack;

41
srsue/src/phy/phch_worker.cc
View File

@ -254,11 +254,23 @@ void phch_worker::work_imp()
}
/* Select Rank Indicator by computing Condition Number */
if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_3 ||
phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_4) {
if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_3) {
float cn = 0.0f;
srslte_ue_dl_ri_select(&ue_dl, &uci_data.uci_ri, &cn);
uci_data.uci_ri_len = 1;
} else if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_4){
float sinr = 0.0f;
uint8 packed_pmi = 0;
srslte_ue_dl_ri_pmi_select(&ue_dl, &uci_data.uci_ri, &packed_pmi, &sinr);
srslte_bit_unpack_vector(&packed_pmi, uci_data.uci_pmi, 2);
uci_data.uci_ri_len = 1;
if (uci_data.uci_ri == 0) {
uci_data.uci_pmi_len = 2;
uci_data.uci_dif_cqi_len = 0;
} else {
uci_data.uci_pmi_len = 1;
uci_data.uci_dif_cqi_len = 3;
}
}
}
}
@ -740,7 +752,16 @@ void phch_worker::set_uci_periodic_cqi()
int cqi_max = phy->args->cqi_max;
if (period_cqi.configured && rnti_is_set) {
if (srslte_cqi_send(period_cqi.pmi_idx, (tti+4)%10240)) {
if (period_cqi.ri_idx_present && srslte_ri_send(period_cqi.pmi_idx, period_cqi.ri_idx, (tti+4)%10240)) {
if (uci_data.uci_ri_len) {
uci_data.uci_cqi[0] = uci_data.uci_ri;
uci_data.uci_cqi_len = uci_data.uci_ri_len;
uci_data.uci_ri_len = 0;
uci_data.uci_dif_cqi_len = 0;
uci_data.uci_pmi_len = 0;
Info("PUCCH: Periodic RI=%d\n", uci_data.uci_cqi[0]);
}
} else if (srslte_cqi_send(period_cqi.pmi_idx, (tti+4)%10240)) {
srslte_cqi_value_t cqi_report;
if (period_cqi.format_is_subband) {
// TODO: Implement subband periodic reports
@ -902,11 +923,12 @@ void phch_worker::encode_pucch()
float tx_power = srslte_ue_ul_pucch_power(&ue_ul, phy->pathloss, ue_ul.last_pucch_format, uci_data.uci_cqi_len, uci_data.uci_ack_len);
float gain = set_power(tx_power);
Info("PUCCH: power=%.2f dBm, tti_tx=%d, n_cce=%3d, n_pucch=%d, n_prb=%d, ack=%s%s, sr=%s, cfo=%.1f Hz%s\n",
Info("PUCCH: power=%.2f dBm, tti_tx=%d, n_cce=%3d, n_pucch=%d, n_prb=%d, ack=%s%s, ri=%s, sr=%s, cfo=%.1f Hz%s\n",
tx_power, (tti+4)%10240,
last_dl_pdcch_ncce, ue_ul.pucch.last_n_pucch, ue_ul.pucch.last_n_prb,
uci_data.uci_ack_len>0?(uci_data.uci_ack?"1":"0"):"no",
uci_data.uci_ack_len>1?(uci_data.uci_ack_2?"1":"0"):"",
uci_data.uci_ri_len>0?(uci_data.uci_ri?"1":"0"):"no",
uci_data.scheduling_request?"yes":"no",
cfo*15000, timestr);
}
@ -1037,12 +1059,19 @@ void phch_worker::set_ul_params(bool pregen_disabled)
/* CQI configuration */
bzero(&period_cqi, sizeof(srslte_cqi_periodic_cfg_t));
period_cqi.configured = dedicated->cqi_report_cnfg.report_periodic_setup_present;
period_cqi.pmi_idx = dedicated->cqi_report_cnfg.report_periodic.pmi_cnfg_idx;
period_cqi.pmi_idx = dedicated->cqi_report_cnfg.report_periodic.pmi_cnfg_idx;
period_cqi.simul_cqi_ack = dedicated->cqi_report_cnfg.report_periodic.simult_ack_nack_and_cqi;
period_cqi.format_is_subband = dedicated->cqi_report_cnfg.report_periodic.format_ind_periodic ==
LIBLTE_RRC_CQI_FORMAT_INDICATOR_PERIODIC_SUBBAND_CQI;
period_cqi.subband_size = dedicated->cqi_report_cnfg.report_periodic.format_ind_periodic_subband_k;
if (dedicated->cqi_report_cnfg.report_periodic.ri_cnfg_idx_present) {
period_cqi.ri_idx = dedicated->cqi_report_cnfg.report_periodic.ri_cnfg_idx;
period_cqi.ri_idx_present = true;
} else {
period_cqi.ri_idx_present = false;
}
/* SR configuration */
I_sr = dedicated->sched_request_cnfg.sr_cnfg_idx;