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182 lines
6.8 KiB
C
182 lines
6.8 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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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 CQI_
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#define CQI_
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#include <stdint.h>
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common.h"
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#define SRSLTE_CQI_MAX_BITS 64
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#define SRSLTE_DIF_CQI_MAX_BITS 3
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#define SRSLTE_PMI_MAX_BITS 4
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typedef struct {
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bool configured;
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uint32_t pmi_idx;
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uint32_t ri_idx;
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bool ri_idx_present;
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bool simul_cqi_ack;
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bool format_is_subband;
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uint32_t subband_size;
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} srslte_cqi_periodic_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 SRSLTE_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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uint32_t N;
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bool ri_present;
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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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} srslte_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 SRSLTE_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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uint32_t L;
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} srslte_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 SRSLTE_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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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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} srslte_cqi_format2_wideband_t;
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typedef struct SRSLTE_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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bool subband_label_2_bits; // false, label=1-bit, true label=2-bits
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} srslte_cqi_format2_subband_t;
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typedef enum {
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SRSLTE_CQI_TYPE_WIDEBAND = 0,
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SRSLTE_CQI_TYPE_SUBBAND,
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SRSLTE_CQI_TYPE_SUBBAND_UE,
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SRSLTE_CQI_TYPE_SUBBAND_HL
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} srslte_cqi_type_t;
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typedef struct {
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union {
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srslte_cqi_format2_wideband_t wideband;
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srslte_cqi_format2_subband_t subband;
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srslte_cqi_ue_subband_t subband_ue;
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srslte_cqi_hl_subband_t subband_hl;
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};
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srslte_cqi_type_t type;
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} srslte_cqi_value_t;
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SRSLTE_API int srslte_cqi_size(srslte_cqi_value_t *value);
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SRSLTE_API int srslte_cqi_value_pack(srslte_cqi_value_t *value,
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uint8_t buff[SRSLTE_CQI_MAX_BITS]);
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SRSLTE_API int srslte_cqi_hl_subband_pack(srslte_cqi_hl_subband_t *msg,
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uint8_t buff[SRSLTE_CQI_MAX_BITS]);
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SRSLTE_API int srslte_cqi_ue_subband_pack(srslte_cqi_ue_subband_t *msg,
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uint8_t buff[SRSLTE_CQI_MAX_BITS]);
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SRSLTE_API int srslte_cqi_format2_wideband_pack(srslte_cqi_format2_wideband_t *msg,
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uint8_t buff[SRSLTE_CQI_MAX_BITS]);
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SRSLTE_API int srslte_cqi_format2_subband_pack(srslte_cqi_format2_subband_t *msg,
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uint8_t buff[SRSLTE_CQI_MAX_BITS]);
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SRSLTE_API int srslte_cqi_value_unpack(uint8_t buff[SRSLTE_CQI_MAX_BITS],
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srslte_cqi_value_t *value);
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SRSLTE_API int srslte_cqi_hl_subband_unpack(uint8_t buff[SRSLTE_CQI_MAX_BITS],
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srslte_cqi_hl_subband_t *msg);
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SRSLTE_API int srslte_cqi_ue_subband_unpack(uint8_t buff[SRSLTE_CQI_MAX_BITS],
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srslte_cqi_ue_subband_t *msg);
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SRSLTE_API int srslte_cqi_format2_wideband_unpack(uint8_t buff[SRSLTE_CQI_MAX_BITS],
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srslte_cqi_format2_wideband_t *msg);
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SRSLTE_API int srslte_cqi_format2_subband_unpack(uint8_t buff[SRSLTE_CQI_MAX_BITS],
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srslte_cqi_format2_subband_t *msg);
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SRSLTE_API bool srslte_cqi_send(uint32_t I_cqi_pmi,
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uint32_t tti);
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SRSLTE_API bool srslte_ri_send(uint32_t I_cqi_pmi,
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uint32_t I_ri,
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uint32_t tti);
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SRSLTE_API uint8_t srslte_cqi_from_snr(float snr);
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SRSLTE_API float srslte_cqi_to_coderate(uint32_t cqi);
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SRSLTE_API int srslte_cqi_hl_get_subband_size(int num_prbs);
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SRSLTE_API int srslte_cqi_hl_get_no_subbands(int num_prbs);
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SRSLTE_API void srslte_cqi_to_str(const uint8_t *cqi_value, int cqi_len, char *str, int str_len);
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#endif // CQI_
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