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158 lines
5.5 KiB
C
158 lines
5.5 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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/******************************************************************************
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* File: cqi.h
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*
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* Description: Channel quality indicator message packing.
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*
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* Reference: 3GPP TS 36.212 version 10.0.0 Release 10 Sec. 5.2.2.6, 5.2.3.3
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*****************************************************************************/
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#ifndef SRSRAN_CQI_H
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#define SRSRAN_CQI_H
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#include <stdint.h>
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#include "srsran/config.h"
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#include "srsran/phy/common/phy_common.h"
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#define SRSRAN_CQI_MAX_BITS 64
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#define SRSRAN_DIF_CQI_MAX_BITS 3
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#define SRSRAN_PMI_MAX_BITS 4
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#define SRSRAN_CQI_STR_MAX_CHAR 64
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typedef enum {
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SRSRAN_CQI_MODE_10,
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SRSRAN_CQI_MODE_11,
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SRSRAN_CQI_MODE_12,
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SRSRAN_CQI_MODE_20,
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SRSRAN_CQI_MODE_21,
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SRSRAN_CQI_MODE_22,
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SRSRAN_CQI_MODE_30,
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SRSRAN_CQI_MODE_31,
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SRSRAN_CQI_MODE_NA,
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} srsran_cqi_report_mode_t;
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typedef struct {
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bool periodic_configured;
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bool aperiodic_configured;
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uint16_t pmi_idx;
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uint32_t ri_idx;
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bool ri_idx_present;
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bool format_is_subband;
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uint32_t subband_size;
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srsran_cqi_report_mode_t periodic_mode;
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srsran_cqi_report_mode_t aperiodic_mode;
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} srsran_cqi_report_cfg_t;
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/* Table 5.2.2.6.2-1: Fields for channel quality information feedback for higher layer configured subband
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CQI reports (transmission mode 1, transmission mode 2, transmission mode 3, transmission mode 7 and
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transmission mode 8 configured without PMI/RI reporting). */
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/* Table 5.2.2.6.2-2: Fields for channel quality information (CQI) feedback for higher layer configured subband CQI
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reports (transmission mode 4, transmission mode 5 and transmission mode 6). */
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typedef struct SRSRAN_API {
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uint8_t wideband_cqi_cw0; // 4-bit width
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uint32_t subband_diff_cqi_cw0; // 2N-bit width
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uint8_t wideband_cqi_cw1; // if RI > 1 then 4-bit width otherwise 0-bit width
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uint32_t subband_diff_cqi_cw1; // if RI > 1 then 2N-bit width otherwise 0-bit width
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uint32_t pmi; // if RI > 1 then 2-bit width otherwise 1-bit width
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} srsran_cqi_hl_subband_t;
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/* Table 5.2.2.6.3-1: Fields for channel quality information feedback for UE selected subband CQI
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reports
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(transmission mode 1, transmission mode 2, transmission mode 3, transmission mode 7 and
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transmission mode 8 configured without PMI/RI reporting). */
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typedef struct SRSRAN_API {
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uint8_t wideband_cqi; // 4-bit width
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uint8_t subband_diff_cqi; // 2-bit width
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uint32_t position_subband; // L-bit width
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} srsran_cqi_ue_subband_t;
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/* Table 5.2.3.3.1-1: Fields for channel quality information feedback for wideband CQI reports
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(transmission mode 1, transmission mode 2, transmission mode 3, transmission mode 7 and
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transmission mode 8 configured without PMI/RI reporting).
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This is for PUCCH Format 2 reports
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*/
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/* Table 5.2.3.3.1-2: UCI fields for channel quality and precoding information (CQI/PMI) feedback for
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wideband reports (transmission mode 4, transmission mode 5 and transmission mode 6)
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This is for PUCCH Format 2 reports
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*/
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typedef struct SRSRAN_API {
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uint8_t wideband_cqi; // 4-bit width
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uint8_t spatial_diff_cqi; // If Rank==1 then it is 0-bit width otherwise it is 3-bit width
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uint8_t pmi;
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} srsran_cqi_format2_wideband_t;
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typedef struct SRSRAN_API {
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uint8_t subband_cqi; // 4-bit width
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uint8_t subband_label; // 1- or 2-bit width
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} srsran_cqi_format2_subband_t;
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typedef enum {
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SRSRAN_CQI_TYPE_WIDEBAND = 0,
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SRSRAN_CQI_TYPE_SUBBAND,
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SRSRAN_CQI_TYPE_SUBBAND_UE,
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SRSRAN_CQI_TYPE_SUBBAND_HL
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} srsran_cqi_type_t;
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typedef struct SRSRAN_API {
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bool data_enable;
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bool pmi_present;
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bool four_antenna_ports; ///< If cell has 4 antenna ports then true otherwise false
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bool rank_is_not_one; ///< If rank > 1 then true otherwise false
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bool subband_label_2_bits; ///< false, label=1-bit, true label=2-ack_value
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uint32_t scell_index; ///< Indicates the cell/carrier the measurement belongs, use 0 for PCell
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uint32_t L;
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uint32_t N;
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srsran_cqi_type_t type;
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uint32_t ri_len;
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} srsran_cqi_cfg_t;
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typedef struct {
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union {
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srsran_cqi_format2_wideband_t wideband;
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srsran_cqi_format2_subband_t subband;
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srsran_cqi_ue_subband_t subband_ue;
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srsran_cqi_hl_subband_t subband_hl;
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};
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bool data_crc;
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} srsran_cqi_value_t;
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SRSRAN_API int srsran_cqi_size(srsran_cqi_cfg_t* cfg);
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SRSRAN_API int srsran_cqi_value_pack(srsran_cqi_cfg_t* cfg, srsran_cqi_value_t* value, uint8_t* buff);
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SRSRAN_API int
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srsran_cqi_value_unpack(srsran_cqi_cfg_t* cfg, uint8_t buff[SRSRAN_CQI_MAX_BITS], srsran_cqi_value_t* value);
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SRSRAN_API int
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srsran_cqi_value_tostring(srsran_cqi_cfg_t* cfg, srsran_cqi_value_t* value, char* buff, uint32_t buff_len);
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SRSRAN_API bool
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srsran_cqi_periodic_send(const srsran_cqi_report_cfg_t* periodic_cfg, uint32_t tti, srsran_frame_type_t frame_type);
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SRSRAN_API bool
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srsran_cqi_periodic_ri_send(const srsran_cqi_report_cfg_t* periodic_cfg, uint32_t tti, srsran_frame_type_t frame_type);
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SRSRAN_API int srsran_cqi_hl_get_no_subbands(int nof_prb);
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SRSRAN_API uint8_t srsran_cqi_from_snr(float snr);
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SRSRAN_API float srsran_cqi_to_coderate(uint32_t cqi, bool use_alt_table);
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#endif // SRSRAN_CQI_H
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