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@ -272,6 +272,39 @@ void phch_worker::work_imp()
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if (dl_action.generate_ack) {
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set_uci_ack(dl_ack, dl_mac_grant.tb_en);
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}
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/* Select Rank Indicator by computing Condition Number */
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if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_3) {
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if (ue_dl.nof_rx_antennas > 1) {
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/* If 2 ort more receiving antennas, select RI */
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float cn = 0.0f;
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srslte_ue_dl_ri_select(&ue_dl, &uci_data.uci_ri, &cn);
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uci_data.uci_ri_len = 1;
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} else {
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/* If only one receiving antenna, force RI for 1 layer */
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uci_data.uci_ri = 0;
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uci_data.uci_ri_len = 1;
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Warning("Only one receiving antenna with TM3. Forcing RI=1 layer.\n");
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}
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} else if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_4){
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float sinr = 0.0f;
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uint8 packed_pmi = 0;
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srslte_ue_dl_ri_pmi_select(&ue_dl, &uci_data.uci_ri, &packed_pmi, &sinr);
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srslte_bit_unpack_vector(&packed_pmi, uci_data.uci_pmi, 2);
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uci_data.uci_ri_len = 1;
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if (uci_data.uci_ri == 0) {
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uci_data.uci_pmi_len = 2;
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uci_data.uci_dif_cqi_len = 0;
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} else {
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uci_data.uci_pmi_len = 1;
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uci_data.uci_dif_cqi_len = 3;
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}
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/* If only one antenna in TM4 print limitation warning */
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if (ue_dl.nof_rx_antennas < 2) {
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Warning("Only one receiving antenna with TM4. Forcing RI=1 layer (PMI=%d).\n", packed_pmi);
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}
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}
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}
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}
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@ -327,7 +360,7 @@ void phch_worker::work_imp()
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phy->set_pending_ack(TTI_RX_ACK(tti), ue_ul.pusch_cfg.grant.n_prb_tilde[0], ul_action.phy_grant.ul.ncs_dmrs);
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}
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} else if (dl_action.generate_ack || uci_data.scheduling_request || uci_data.uci_cqi_len > 0 || uci_data.uci_ri_len > 0) {
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} else if (dl_action.generate_ack || uci_data.scheduling_request || uci_data.uci_cqi_len > 0) {
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encode_pucch();
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signal_ready = true;
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} else if (srs_is_ready_to_send()) {
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@ -377,42 +410,6 @@ void phch_worker::work_imp()
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#endif
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}
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void phch_worker::compute_ri() {
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if (uci_data.uci_ri_len > 0) {
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/* Do nothing */
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} else if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_3) {
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if (ue_dl.nof_rx_antennas > 1) {
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/* If 2 ort more receiving antennas, select RI */
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float cn = 0.0f;
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srslte_ue_dl_ri_select(&ue_dl, &uci_data.uci_ri, &cn);
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Info("RI select %d layers, κ=%fdB\n", uci_data.uci_ri + 1, cn);
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} else {
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/* If only one receiving antenna, force RI for 1 layer */
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uci_data.uci_ri = 0;
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Warning("Only one receiving antenna with TM3. Forcing RI=1 layer.\n");
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}
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uci_data.uci_ri_len = 1;
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} else if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_4) {
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float sinr = 0.0f;
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uint8 packed_pmi = 0;
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srslte_ue_dl_ri_pmi_select(&ue_dl, &uci_data.uci_ri, &packed_pmi, &sinr);
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if (uci_data.uci_ri == 0) {
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uci_data.uci_pmi_len = 2;
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uci_data.uci_dif_cqi_len = 0;
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} else {
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uci_data.uci_pmi_len = 1;
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uci_data.uci_dif_cqi_len = 3;
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}
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srslte_bit_unpack_vector(&packed_pmi, uci_data.uci_pmi, uci_data.uci_pmi_len);
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Info("ri=%d; pmi=%d; SINR=%.1fdB\n", ue_dl.ri, ue_dl.pmi[ue_dl.ri], 10*log10f(ue_dl.sinr[ue_dl.ri][ue_dl.pmi[ue_dl.ri]]));
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/* If only one antenna in TM4 print limitation warning */
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if (ue_dl.nof_rx_antennas < 2) {
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Warning("Only one receiving antenna with TM4. Forcing RI=1 layer (PMI=%d).\n", packed_pmi);
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}
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uci_data.uci_ri_len = 1;
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}
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}
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bool phch_worker::extract_fft_and_pdcch_llr() {
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bool decode_pdcch = true;
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@ -826,15 +823,21 @@ void phch_worker::reset_uci()
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void phch_worker::set_uci_ack(bool ack[SRSLTE_MAX_CODEWORDS], bool tb_en[SRSLTE_MAX_CODEWORDS])
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{
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/* Map ACK according to 3GPP 36.212 clause 5.2.3.1 */
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uint32_t nof_ack = 0;
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for (uint32_t tb = 0; tb < SRSLTE_MAX_CODEWORDS; tb++) {
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if (tb_en[tb]) {
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((nof_ack == 0)?uci_data.uci_ack:uci_data.uci_ack_2) = (uint8_t)(ack[tb]?1:0);
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nof_ack++;
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}
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uint32_t nof_tb = 0;
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if (tb_en[0]) {
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uci_data.uci_ack = (uint8_t) ((ack[0]) ? 1 : 0);
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nof_tb = 1;
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} else {
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uci_data.uci_ack = 1;
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}
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uci_data.uci_ack_len = nof_ack;
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if (tb_en[1]) {
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uci_data.uci_ack_2 = (uint8_t) ((ack[1]) ? 1 : 0);
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nof_tb = 2;
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}
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uci_data.uci_ack_len = nof_tb;
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}
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void phch_worker::set_uci_sr()
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@ -859,9 +862,14 @@ void phch_worker::set_uci_periodic_cqi()
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if (period_cqi.configured && rnti_is_set) {
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if (period_cqi.ri_idx_present && srslte_ri_send(period_cqi.pmi_idx, period_cqi.ri_idx, TTI_TX(tti))) {
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compute_ri();
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uci_data.ri_periodic_report = true;
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Info("PUCCH: Periodic RI=%d\n", uci_data.uci_ri);
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if (uci_data.uci_ri_len) {
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uci_data.uci_cqi[0] = uci_data.uci_ri;
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uci_data.uci_cqi_len = uci_data.uci_ri_len;
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uci_data.uci_ri_len = 0;
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uci_data.uci_dif_cqi_len = 0;
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uci_data.uci_pmi_len = 0;
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Info("PUCCH: Periodic RI=%d\n", uci_data.uci_cqi[0]);
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}
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} else if (srslte_cqi_send(period_cqi.pmi_idx, TTI_TX(tti))) {
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srslte_cqi_value_t cqi_report;
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if (period_cqi.format_is_subband) {
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@ -883,16 +891,6 @@ void phch_worker::set_uci_periodic_cqi()
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}
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Info("PUCCH: Periodic CQI=%d, SNR=%.1f dB\n", cqi_report.wideband.wideband_cqi, phy->avg_snr_db);
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}
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if (phy->config->dedicated.antenna_info_explicit_value.tx_mode == LIBLTE_RRC_TRANSMISSION_MODE_4) {
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if (ue_dl.ri == 0) {
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uci_data.uci_pmi_len = 2;
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} else {
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uci_data.uci_pmi_len = 1;
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uci_data.uci_dif_cqi_len = 3;
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}
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uint8_t *ptr = uci_data.uci_pmi;
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srslte_bit_unpack(ue_dl.pmi[ue_dl.ri], &ptr, uci_data.uci_pmi_len);
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}
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uci_data.uci_cqi_len = srslte_cqi_value_pack(&cqi_report, uci_data.uci_cqi);
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rar_cqi_request = false;
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}
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@ -914,71 +912,18 @@ void phch_worker::set_uci_aperiodic_cqi()
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reported RI. For other transmission modes they are reported conditioned on rank 1.
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*/
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if (rnti_is_set) {
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srslte_cqi_value_t cqi_report = {0};
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srslte_cqi_value_t cqi_report;
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cqi_report.type = SRSLTE_CQI_TYPE_SUBBAND_HL;
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cqi_report.subband_hl.wideband_cqi_cw0 = srslte_cqi_from_snr(phy->avg_snr_db);
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cqi_report.subband_hl.wideband_cqi = srslte_cqi_from_snr(phy->avg_snr_db);
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// TODO: implement subband CQI properly
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cqi_report.subband_hl.subband_diff_cqi_cw0 = 0; // Always report zero offset on all subbands
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cqi_report.subband_hl.subband_diff_cqi = 0; // Always report zero offset on all subbands
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cqi_report.subband_hl.N = (cell.nof_prb > 7) ? srslte_cqi_hl_get_no_subbands(cell.nof_prb) : 0;
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Info("PUSCH: Aperiodic CQI=%d, SNR=%.1f dB, for %d subbands\n", cqi_report.wideband.wideband_cqi, phy->avg_snr_db, cqi_report.subband_hl.N);
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uci_data.uci_cqi_len = srslte_cqi_value_pack(&cqi_report, uci_data.uci_cqi);
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}
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break;
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case LIBLTE_RRC_CQI_REPORT_MODE_APERIODIC_RM31:
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/* only Higher Layer-configured subband feedback support right now, according to TS36.213 section 7.2.1
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- A single precoding matrix is selected from the codebook subset assuming transmission on set S subbands
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- A UE shall report one subband CQI value per codeword for each set S subband which are calculated assuming
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the use of the single precoding matrix in all subbands and assuming transmission in the corresponding
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subband.
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- A UE shall report a wideband CQI value per codeword which is calculated assuming the use of the single
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precoding matrix in all subbands and transmission on set S subbands
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- The UE shall report the single selected precoding matrix indicator.
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- For transmission mode 4 the reported PMI and CQI values are calculated conditioned on the reported RI. For
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other transmission modes they are reported conditioned on rank 1.
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*/
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if (rnti_is_set) {
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/* Compute RI, PMI and SINR */
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compute_ri();
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/* Select RI, PMI and SINR */
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uint32_t ri = ue_dl.ri; // Select RI (0: 1 layer, 1: 2 layer, otherwise: not implemented)
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uint32_t pmi = ue_dl.pmi[ri]; // Select PMI
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float sinr_db = 10 * log10(ue_dl.sinr[ri][pmi]);
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/* Fill CQI Report */
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srslte_cqi_value_t cqi_report = {0};
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cqi_report.type = SRSLTE_CQI_TYPE_SUBBAND_HL;
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cqi_report.subband_hl.wideband_cqi_cw0 = srslte_cqi_from_snr(sinr_db);
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cqi_report.subband_hl.subband_diff_cqi_cw0 = 0; // Always report zero offset on all subbands
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if (ri > 0) {
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cqi_report.subband_hl.rank_is_not_one = true;
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cqi_report.subband_hl.wideband_cqi_cw1 = srslte_cqi_from_snr(sinr_db);
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cqi_report.subband_hl.subband_diff_cqi_cw1 = 0; // Always report zero offset on all subbands
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}
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cqi_report.subband_hl.pmi = pmi;
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cqi_report.subband_hl.pmi_present = true;
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cqi_report.subband_hl.four_antenna_ports = (cell.nof_ports == 4);
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// TODO: implement subband CQI properly
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cqi_report.subband_hl.N = (uint32_t) ((cell.nof_prb > 7) ? srslte_cqi_hl_get_no_subbands(cell.nof_prb) : 0);
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if (cqi_report.subband_hl.rank_is_not_one) {
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Info("PUSCH: Aperiodic ri~1, CQI=%02d/%02d, SINR=%2.1f/%2.1fdB, pmi=%d for %d subbands\n",
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cqi_report.subband_hl.wideband_cqi_cw0, cqi_report.subband_hl.wideband_cqi_cw1,
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sinr_db, sinr_db, pmi, cqi_report.subband_hl.N);
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} else {
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Info("PUSCH: Aperiodic ri=1, CQI=%d/%d, SINR=%2.1f dB, for %d subbands\n",
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cqi_report.wideband.wideband_cqi,
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phy->avg_snr_db, cqi_report.subband_hl.N);
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}
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uci_data.uci_cqi_len = srslte_cqi_value_pack(&cqi_report, uci_data.uci_cqi);
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}
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break;
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default:
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Warning("Received CQI request but mode %s is not supported\n",
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liblte_rrc_cqi_report_mode_aperiodic_text[phy->config->dedicated.cqi_report_cnfg.report_mode_aperiodic]);
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@ -1061,7 +1006,7 @@ void phch_worker::encode_pucch()
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char timestr[64];
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timestr[0]='\0';
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if (uci_data.scheduling_request || uci_data.uci_ack_len > 0 || uci_data.uci_cqi_len > 0 || uci_data.uci_ri_len > 0)
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if (uci_data.scheduling_request || uci_data.uci_ack_len > 0 || uci_data.uci_cqi_len > 0)
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{
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// Drop CQI if there is collision with ACK
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Ismael Gomez
7 years ago