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/*******************************************************************************
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    OpenAirInterface 
    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is 
   included in this distribution in the file called "COPYING". If not, 
   see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr
  
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  Address      : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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 *******************************************************************************/
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/*! \file PHY/LTE_TRANSPORT/defs.h
* \brief data structures for PDSCH/DLSCH/PUSCH/ULSCH physical and transport channel descriptors (TX/RX)
* \author R. Knopp
* \date 2011
* \version 0.1
* \company Eurecom
* \email: raymond.knopp@eurecom.fr, florian.kaltenberger@eurecom.fr, oscar.tonelli@yahoo.it
* \note
* \warning
*/
#ifndef __LTE_TRANSPORT_DEFS__H__
#define __LTE_TRANSPORT_DEFS__H__
#include "PHY/defs.h"
#include "dci.h"
#include "uci.h"

#define MOD_TABLE_QPSK_OFFSET 1
#define MOD_TABLE_16QAM_OFFSET 5
#define MOD_TABLE_64QAM_OFFSET 21
#define MOD_TABLE_PSS_OFFSET 85

// structures below implement 36-211 and 36-212

/** @addtogroup _PHY_TRANSPORT_
 * @{
 */



#define NSOFT 1827072
#define LTE_NULL 2 

// maximum of 3 segments before each coding block if data length exceeds 6144 bits. 

#define MAX_NUM_DLSCH_SEGMENTS 16
#define MAX_NUM_ULSCH_SEGMENTS MAX_NUM_DLSCH_SEGMENTS
#define MAX_DLSCH_PAYLOAD_BYTES (MAX_NUM_DLSCH_SEGMENTS*768)
#define MAX_ULSCH_PAYLOAD_BYTES (MAX_NUM_ULSCH_SEGMENTS*768)

#define MAX_NUM_CHANNEL_BITS (14*1200*6)  // 14 symbols, 1200 REs, 12 bits/RE
#define MAX_NUM_RE (14*1200)

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#define SI_RNTI  (rnti_t)0xffff
#define M_RNTI   (rnti_t)0xfffd
#define P_RNTI   (rnti_t)0xfffe
#define CBA_RNTI (rnti_t)0xfff4
#define C_RNTI   (rnti_t)0x1234
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#define PMI_2A_11 0
#define PMI_2A_1m1 1
#define PMI_2A_1j 2
#define PMI_2A_1mj 3

typedef enum {
  SCH_IDLE,
  ACTIVE,
  CBA_ACTIVE,
  DISABLED
} SCH_status_t;


typedef struct {
  /// Status Flag indicating for this DLSCH (idle,active,disabled)
  SCH_status_t status;
  /// Transport block size
  uint32_t TBS;
  /// The payload + CRC size in bits, "B" from 36-212 
  uint32_t B;  
  /// Pointer to the payload
  uint8_t *b;             
  /// Pointers to transport block segments
  uint8_t *c[MAX_NUM_DLSCH_SEGMENTS]; 
  /// RTC values for each segment (for definition see 36-212 V8.6 2009-03, p.15)
  uint32_t RTC[MAX_NUM_DLSCH_SEGMENTS];
  /// Index of current HARQ round for this DLSCH                
  uint8_t round;                
  /// MCS format for this DLSCH
  uint8_t mcs;            
  /// Redundancy-version of the current sub-frame
  uint8_t rvidx;
  /// MIMO mode for this DLSCH
  MIMO_mode_t mimo_mode;
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  /// Number of layers for this PDSCH transmission
  uint8_t Nlayers;
  /// First layer for this PSCH transmission
  uint8_t first_layer;
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  /// Turbo-code outputs (36-212 V8.6 2009-03, p.12 
  uint8_t d[MAX_NUM_DLSCH_SEGMENTS][(96+3+(3*6144))];  
  /// Sub-block interleaver outputs (36-212 V8.6 2009-03, p.16-17)
  uint8_t w[MAX_NUM_DLSCH_SEGMENTS][3*6144]; 
  /// Number of code segments (for definition see 36-212 V8.6 2009-03, p.9)            
  uint32_t C;                         
  /// Number of "small" code segments (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Cminus;                    
  /// Number of "large" code segments (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Cplus;                     
  /// Number of bits in "small" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Kminus;                    
  /// Number of bits in "large" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Kplus;                     
  /// Number of "Filler" bits (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t F;                         
  /// Number of MIMO layers (streams) (for definition see 36-212 V8.6 2009-03, p.17)
  uint8_t Nl;                       
} LTE_DL_eNB_HARQ_t;

typedef struct {
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  /// Indicator of first transmission
  uint8_t first_tx;
  /// Last Ndi received for this process on DCI (used for C-RNTI only)
  uint8_t DCINdi;
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  /// Flag indicating that this ULSCH has a new packet (start of new round) 
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  //  uint8_t Ndi;
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  /// Status Flag indicating for this ULSCH (idle,active,disabled)
  SCH_status_t status;
  /// Subframe scheduling indicator (i.e. Transmission opportunity indicator)
  uint8_t subframe_scheduling_flag;
  /// Subframe cba scheduling indicator (i.e. Transmission opportunity indicator)
  uint8_t subframe_cba_scheduling_flag;
  /// First Allocated RB 
  uint16_t first_rb;
  /// Current Number of RBs
  uint16_t nb_rb;
  /// Last TPC command
  uint8_t TPC;
  /// Transport block size
  uint32_t TBS;
  /// The payload + CRC size in bits, "B" from 36-212 
  uint32_t B;  
  /// Length of ACK information (bits)
  uint8_t O_ACK;
  /// Pointer to the payload
  uint8_t *b;             
  /// Pointers to transport block segments
  uint8_t *c[MAX_NUM_ULSCH_SEGMENTS]; 
  /// RTC values for each segment (for definition see 36-212 V8.6 2009-03, p.15)
  uint32_t RTC[MAX_NUM_ULSCH_SEGMENTS];
  /// Index of current HARQ round for this ULSCH                
  uint8_t round;                
  /// MCS format of this ULSCH
  uint8_t mcs;            
  /// Redundancy-version of the current sub-frame
  uint8_t rvidx;
  /// Turbo-code outputs (36-212 V8.6 2009-03, p.12 
  uint8_t d[MAX_NUM_ULSCH_SEGMENTS][(96+3+(3*6144))];  
  /// Sub-block interleaver outputs (36-212 V8.6 2009-03, p.16-17)
  uint8_t w[MAX_NUM_ULSCH_SEGMENTS][3*6144]; 
  /// Number of code segments (for definition see 36-212 V8.6 2009-03, p.9)            
  uint32_t C;                         
  /// Number of "small" code segments (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Cminus;                    
  /// Number of "large" code segments (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Cplus;                     
  /// Number of bits in "small" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Kminus;                    
  /// Number of bits in "large" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Kplus;                     
  /// Total number of bits across all segments
  uint32_t sumKr;
  /// Number of "Filler" bits (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t F;                         
  /// Msc_initial, Initial number of subcarriers for ULSCH (36-212, v8.6 2009-03, p.26-27)
  uint16_t Msc_initial;
  /// Nsymb_initial, Initial number of symbols for ULSCH (36-212, v8.6 2009-03, p.26-27)
  uint8_t Nsymb_initial;
  /// n_DMRS  for cyclic shift of DMRS (36.213 Table 9.1.2-2)
  uint8_t n_DMRS;
  /// n_DMRS2 for cyclic shift of DMRS (36.211 Table 5.5.1.1.-1)
  uint8_t n_DMRS2;
  /// Flag to indicate that this is a control only ULSCH (i.e. no MAC SDU)
  uint8_t control_only;
  /// Flag to indicate that this is a calibration ULSCH (i.e. no MAC SDU and filled with TDD calibration information)
  //  int calibration_flag;
} LTE_UL_UE_HARQ_t;

typedef struct {
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  /// TX buffers for UE-spec transmission (antenna ports 5 or 7..14, prior to precoding)
  uint32_t *txdataF[8]; 
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  /// Allocated RNTI (0 means DLSCH_t is not currently used)
  uint16_t rnti; 
  /// Active flag for baseband transmitter processing
  uint8_t active;
  /// Indicator of TX activation per subframe.  Used during PUCCH detection for ACK/NAK.
  uint8_t subframe_tx[10];
  /// First CCE of last PDSCH scheduling per subframe.  Again used during PUCCH detection for ACK/NAK. 
  uint8_t nCCE[10];
  /// Current HARQ process id
  uint8_t current_harq_pid;
  /// Process ID's per subframe.  Used to associate received ACKs on PUSCH/PUCCH to DLSCH harq process ids
  uint8_t harq_ids[10];
  /// Window size (in outgoing transport blocks) for fine-grain rate adaptation
  uint8_t ra_window_size;
  /// First-round error threshold for fine-grain rate adaptation
  uint8_t error_threshold;
  /// Current RB allocation
  uint32_t rb_alloc[4];
  /// Current subband PMI allocation
  uint16_t pmi_alloc;
  /// Current subband RI allocation
  uint32_t ri_alloc;
  /// Current subband CQI1 allocation
  uint32_t cqi_alloc1;
  /// Current subband CQI2 allocation
  uint32_t cqi_alloc2;
  /// Current Number of RBs
  uint16_t nb_rb;
  /// Pointers to 8 HARQ processes for the DLSCH
  LTE_DL_eNB_HARQ_t *harq_processes[8];     
  /// Number of soft channel bits
  uint32_t G;
  /// Layer index for this dlsch (0,1)
  uint8_t layer_index;          
  /// Codebook index for this dlsch (0,1,2,3)
  uint8_t codebook_index;          
  /// Concatenated "e"-sequences (for definition see 36-212 V8.6 2009-03, p.17-18) 
  uint8_t e[MAX_NUM_CHANNEL_BITS];
  /// Maximum number of HARQ rounds (for definition see 36-212 V8.6 2009-03, p.17)             
  uint8_t Mdlharq;  
  /// MIMO transmission mode indicator for this sub-frame (for definition see 36-212 V8.6 2009-03, p.17)
  uint8_t Kmimo;
  /// downlink power offset field
  uint8_t dl_power_off;
  /// amplitude of PDSCH (compared to RS) in symbols without pilots 
  int16_t sqrt_rho_a;
  /// amplitude of PDSCH (compared to RS) in symbols containing pilots
  int16_t sqrt_rho_b;
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} LTE_eNB_DLSCH_t;

#define PUSCH_x 2
#define PUSCH_y 3

typedef struct {
  /// Current Number of Symbols
  uint8_t Nsymb_pusch;
  /// SRS active flag
  uint8_t srs_active;
  /// Pointers to 8 HARQ processes for the ULSCH
  LTE_UL_UE_HARQ_t *harq_processes[8];     
  /// Pointer to CQI data
  uint8_t o[MAX_CQI_BYTES];
  /// Length of CQI data (bits)
  uint8_t O;
  /// Format of CQI data 
  UCI_format_t uci_format;
  /// Rank information 
  uint8_t o_RI[2];
  /// Length of rank information (bits)
  uint8_t O_RI;
  /// Pointer to ACK
  uint8_t o_ACK[4];
  /// Minimum number of CQI bits for PUSCH (36-212 r8.6, Sec 5.2.4.1 p. 37)
  uint8_t O_CQI_MIN;
  /// ACK/NAK Bundling flag
  uint8_t bundling;
  /// Concatenated "e"-sequences (for definition see 36-212 V8.6 2009-03, p.17-18) 
  uint8_t e[MAX_NUM_CHANNEL_BITS];
  /// Interleaved "h"-sequences (for definition see 36-212 V8.6 2009-03, p.17-18) 
  uint8_t h[MAX_NUM_CHANNEL_BITS];
  /// Scrambled "b"-sequences (for definition see 36-211 V8.6 2009-03, p.14) 
  uint8_t b_tilde[MAX_NUM_CHANNEL_BITS];
  /// Modulated "d"-sequences (for definition see 36-211 V8.6 2009-03, p.14) 
  mod_sym_t d[MAX_NUM_RE];
  /// Transform-coded "z"-sequences (for definition see 36-211 V8.6 2009-03, p.14-15) 
  mod_sym_t z[MAX_NUM_RE];
  /// Maximum number of HARQ rounds (for definition see 36-212 V8.6 2009-03, p.17)             
  uint8_t Mdlharq; 
  /// "q" sequences for CQI/PMI (for definition see 36-212 V8.6 2009-03, p.27)
  uint8_t q[MAX_CQI_PAYLOAD];
  /// coded and interleaved CQI bits
  uint8_t o_w[(MAX_CQI_BITS+8)*3];
  /// coded CQI bits
  uint8_t o_d[96+((MAX_CQI_BITS+8)*3)];
  /// coded ACK bits
  uint8_t q_ACK[MAX_ACK_PAYLOAD];
  /// coded RI bits
  uint8_t q_RI[MAX_RI_PAYLOAD];
  /// beta_offset_cqi times 8
  uint16_t beta_offset_cqi_times8;
  /// beta_offset_ri times 8
  uint16_t beta_offset_ri_times8;
  /// beta_offset_harqack times 8
  uint16_t beta_offset_harqack_times8;
  /// power_offset
  uint8_t power_offset;
  // for cooperative communication
  uint8_t cooperation_flag;
  /// RNTI attributed to this ULSCH
  uint16_t rnti;
  /// f_PUSCH parameter for PUSCH power control
  int16_t f_pusch;
  /// Po_PUSCH - target output power for PUSCH
  int16_t Po_PUSCH;
  /// PHR - current power headroom (based on last PUSCH transmission)
  int16_t PHR;
  /// num active cba group 
  uint8_t num_active_cba_groups;
  /// num dci found for cba
  uint8_t num_cba_dci[10];
  /// allocated CBA RNTI
  uint16_t cba_rnti[4];//NUM_MAX_CBA_GROUP];
} LTE_UE_ULSCH_t;

typedef struct {
  /// Flag indicating that this ULSCH has been allocated by a DCI (otherwise it is a retransmission based on PHICH NAK)
  uint8_t dci_alloc;
  /// Flag indicating that this ULSCH has been allocated by a RAR (otherwise it is a retransmission based on PHICH NAK or DCI)
  uint8_t rar_alloc;
  /// Status Flag indicating for this ULSCH (idle,active,disabled)
  SCH_status_t status;
  /// Subframe scheduling indicator (i.e. Transmission opportunity indicator)
  uint8_t subframe_scheduling_flag;
  /// Subframe cba scheduling indicator (i.e. CBA Transmission opportunity indicator)
  uint8_t subframe_cba_scheduling_flag;
  /// PHICH active flag
  uint8_t phich_active;
  /// PHICH ACK
  uint8_t phich_ACK;
  /// Last TPC command
  uint8_t TPC;
  /// First Allocated RB 
  uint16_t first_rb;
  /// Current Number of RBs
  uint16_t nb_rb;
  /// Transport block size
  uint32_t TBS;
  /// The payload + CRC size in bits  
  uint32_t B; 
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  /// CQI CRC status
  uint8_t cqi_crc_status;
  /// Pointer to CQI data
  uint8_t o[MAX_CQI_BYTES];
  /// Format of CQI data 
  UCI_format_t uci_format;
  /// Length of CQI data under RI=1 assumption(bits)
  uint8_t Or1;
  /// Length of CQI data under RI=2 assumption(bits)
  uint8_t Or2;
  /// Rank information 
  uint8_t o_RI[2];
  /// Length of rank information (bits)
  uint8_t O_RI;
  /// Pointer to ACK
  uint8_t o_ACK[4];
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  /// Length of ACK information (bits)
  uint8_t O_ACK;
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  /// The value of DAI in DCI format 0 
  uint8_t V_UL_DAI;
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  /// "q" sequences for CQI/PMI (for definition see 36-212 V8.6 2009-03, p.27)
  int8_t q[MAX_CQI_PAYLOAD];
  /// number of coded CQI bits after interleaving
  uint8_t o_RCC;
  /// coded and interleaved CQI bits
  int8_t o_w[(MAX_CQI_BITS+8)*3];
  /// coded CQI bits
  int8_t o_d[96+((MAX_CQI_BITS+8)*3)];
  /// coded ACK bits
  int16_t q_ACK[MAX_ACK_PAYLOAD];
  /// coded RI bits
  int16_t q_RI[MAX_RI_PAYLOAD];
  /// Concatenated "e"-sequences (for definition see 36-212 V8.6 2009-03, p.17-18) 
  int16_t e[MAX_NUM_CHANNEL_BITS];
  /// Temporary h sequence to flag PUSCH_x/PUSCH_y symbols which are not scrambled
  uint8_t h[MAX_NUM_CHANNEL_BITS];
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  /// Pointer to the payload
  uint8_t *b;  
  /// Pointers to transport block segments
  uint8_t *c[MAX_NUM_ULSCH_SEGMENTS];
  /// RTC values for each segment (for definition see 36-212 V8.6 2009-03, p.15)  
  uint32_t RTC[MAX_NUM_ULSCH_SEGMENTS]; 
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  /// Current Number of Symbols
  uint8_t Nsymb_pusch;
  /// SRS active flag
  uint8_t srs_active;
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  /// Index of current HARQ round for this ULSCH
  uint8_t round; 
  /// MCS format for this ULSCH
  uint8_t mcs; 
  /// Redundancy-version of the current sub-frame
  uint8_t rvidx;
  /// soft bits for each received segment ("w"-sequence)(for definition see 36-212 V8.6 2009-03, p.15) 
  int16_t w[MAX_NUM_ULSCH_SEGMENTS][3*(6144+64)];
  /// soft bits for each received segment ("d"-sequence)(for definition see 36-212 V8.6 2009-03, p.15)    
  int16_t *d[MAX_NUM_ULSCH_SEGMENTS];
  /// Number of code segments (for definition see 36-212 V8.6 2009-03, p.9)   
  uint32_t C;  
  /// Number of "small" code segments (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Cminus; 
  /// Number of "large" code segments (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Cplus;  
  /// Number of bits in "small" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Kminus; 
  /// Number of bits in "large" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Kplus;
  /// Number of "Filler" bits (for definition see 36-212 V8.6 2009-03, p.10)  
  uint32_t F;  
  /// Number of MIMO layers (streams) (for definition see 36-212 V8.6 2009-03, p.17)
  uint8_t Nl;  
  /// Msc_initial, Initial number of subcarriers for ULSCH (36-212, v8.6 2009-03, p.26-27)
  uint16_t Msc_initial;
  /// Nsymb_initial, Initial number of symbols for ULSCH (36-212, v8.6 2009-03, p.26-27)
  uint8_t Nsymb_initial;
  /// n_DMRS  for cyclic shift of DMRS (36.213 Table 9.1.2-2)
  uint8_t n_DMRS;
  /// n_DMRS 2 for cyclic shift of DMRS (36.211 Table 5.5.1.1.-1)
  uint8_t n_DMRS2;
  /// Flag to indicate that this ULSCH is for calibration information sent from UE (i.e. no MAC SDU to pass up)
  //  int calibration_flag;
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  /// delta_TF for power control
  int32_t delta_TF;
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} LTE_UL_eNB_HARQ_t;

typedef struct {
  /// Pointers to 8 HARQ processes for the ULSCH
  LTE_UL_eNB_HARQ_t *harq_processes[8];     
  /// Maximum number of HARQ rounds (for definition see 36-212 V8.6 2009-03, p.17)             
  uint8_t Mdlharq; 
  /// Maximum number of iterations used in eNB turbo decoder
  uint8_t max_turbo_iterations;
  /// ACK/NAK Bundling flag
  uint8_t bundling;
  /// beta_offset_cqi times 8
  uint16_t beta_offset_cqi_times8;
  /// beta_offset_ri times 8
  uint16_t beta_offset_ri_times8;
  /// beta_offset_harqack times 8
  uint16_t beta_offset_harqack_times8;
  /// Flag to indicate that eNB awaits UE Msg3 
  uint8_t Msg3_active;
  /// Flag to indicate that eNB should decode UE Msg3 
  uint8_t Msg3_flag;
  /// Subframe for Msg3
  uint8_t Msg3_subframe;
  /// Frame for Msg3
  uint32_t Msg3_frame;
  /// RNTI attributed to this ULSCH
  uint16_t rnti;
  /// cyclic shift for DM RS
  uint8_t cyclicShift;
  /// cooperation flag
  uint8_t cooperation_flag;
  /// num active cba group 
  uint8_t num_active_cba_groups;
  /// allocated CBA RNTI for this ulsch
  uint16_t cba_rnti[4];//NUM_MAX_CBA_GROUP];
} LTE_eNB_ULSCH_t;

typedef struct {
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  /// Indicator of first transmission
  uint8_t first_tx;
  /// Last Ndi received for this process on DCI (used for C-RNTI only)
  uint8_t DCINdi;
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  /// DLSCH status flag indicating 
  SCH_status_t status;
  /// Transport block size
  uint32_t TBS;
  /// The payload + CRC size in bits  
  uint32_t B; 
  /// Pointer to the payload
  uint8_t *b;  
  /// Pointers to transport block segments
  uint8_t *c[MAX_NUM_DLSCH_SEGMENTS];
  /// RTC values for each segment (for definition see 36-212 V8.6 2009-03, p.15)  
  uint32_t RTC[MAX_NUM_DLSCH_SEGMENTS]; 
  /// Index of current HARQ round for this DLSCH
  uint8_t round; 
  /// MCS format for this DLSCH
  uint8_t mcs; 
  /// Redundancy-version of the current sub-frame
  uint8_t rvidx;
  /// MIMO mode for this DLSCH
  MIMO_mode_t mimo_mode;
  /// soft bits for each received segment ("w"-sequence)(for definition see 36-212 V8.6 2009-03, p.15) 
  int16_t w[MAX_NUM_DLSCH_SEGMENTS][3*(6144+64)];
  /// for abstraction soft bits for each received segment ("w"-sequence)(for definition see 36-212 V8.6 2009-03, p.15) 
  double w_abs[MAX_NUM_DLSCH_SEGMENTS][3*(6144+64)];
  /// soft bits for each received segment ("d"-sequence)(for definition see 36-212 V8.6 2009-03, p.15)    
  int16_t *d[MAX_NUM_DLSCH_SEGMENTS];
  /// Number of code segments (for definition see 36-212 V8.6 2009-03, p.9)   
  uint32_t C;  
  /// Number of "small" code segments (for definition see 36-212 V8.6 2009-03, p.10)
  uint32_t Cminus; 
  /// Number of "large" code segments (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Cplus;  
  /// Number of bits in "small" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Kminus; 
  /// Number of bits in "large" code segments (<6144) (for definition see 36-212 V8.6 2009-03, p.10) 
  uint32_t Kplus;
  /// Number of "Filler" bits (for definition see 36-212 V8.6 2009-03, p.10)  
  uint32_t F;  
  /// Number of MIMO layers (streams) (for definition see 36-212 V8.6 2009-03, p.17)
  uint8_t Nl;
  /// current delta_pucch
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  int8_t delta_PUCCH;
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  /// Number of soft channel bits
  uint32_t G;
  /// Current Number of RBs
  uint16_t nb_rb;
  /// Current subband PMI allocation
  uint16_t pmi_alloc;
  /// Current RB allocation
  uint32_t rb_alloc[4];
  /// downlink power offset field
  uint8_t dl_power_off;
} LTE_DL_UE_HARQ_t;


typedef struct {
  /// UL RSSI per receive antenna
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  int32_t UL_rssi[NB_ANTENNAS_RX];
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  /// DL Wideband CQI index (2 TBs)
  uint8_t DL_cqi[2];
  /// DL Subband CQI index (from HLC feedback)
  uint8_t DL_subband_cqi[2][13];
  /// DL PMI Single Stream
  uint16_t DL_pmi_single;
  /// DL PMI Dual Stream
  uint16_t DL_pmi_dual;
  /// Current RI
  uint8_t rank;
  /// CRNTI of UE
  uint16_t crnti; ///user id (rnti) of connected UEs
  /// Initial timing offset estimate from PRACH for RAR
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  int32_t UE_timing_offset; 
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  /// Timing advance estimate from PUSCH for MAC timing advance signalling
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  int32_t timing_advance_update; 
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  /// Current mode of UE (NOT SYCHED, RAR, PUSCH)
  UE_MODE_t mode;
  /// Current sector where UE is attached
  uint8_t sector;
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  /// dlsch l2 errors
  uint32_t dlsch_l2_errors[8];
  /// dlsch trials per harq and round 
  uint32_t dlsch_trials[8][8];
  /// dlsch ACK/NACK per hard_pid and round
  uint32_t dlsch_ACK[8][8];
  uint32_t dlsch_NAK[8][8];

  /// ulsch l2 errors per harq_pid
  uint32_t ulsch_errors[8];
  /// ulsch l2 consecutive errors per harq_pid
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  uint32_t ulsch_consecutive_errors; //[8];
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  /// ulsch trials/errors/fer per harq and round
  uint32_t ulsch_decoding_attempts[8][8];
  uint32_t ulsch_round_errors[8][8];
  uint32_t ulsch_decoding_attempts_last[8][8];
  uint32_t ulsch_round_errors_last[8][8];
  uint32_t ulsch_round_fer[8][8];
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  uint32_t sr_received;
  uint32_t sr_total;

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  /// dlsch sliding count and total errors in round 0 are used to compute the dlsch_mcs_offset
  uint32_t dlsch_sliding_cnt;
  uint32_t dlsch_NAK_round0;
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  int8_t dlsch_mcs_offset;
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  /// Target mcs1 after rate-adaptation (used by MAC layer scheduler)
  uint8_t dlsch_mcs1;
  /// Target mcs2 after rate-adaptation (used by MAC layer scheduler)
  uint8_t dlsch_mcs2;
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  /// Total bits received from MAC on PDSCH
  int total_TBS_MAC;
  /// Total bits acknowledged on PDSCH
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  int total_TBS;
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  /// Total bits acknowledged on PDSCH (last interval)
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  int total_TBS_last;
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  /// Bitrate on the PDSCH [bps]
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  unsigned int dlsch_bitrate;
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  //  unsigned int total_transmitted_bits;
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} LTE_eNB_UE_stats;

typedef struct {
  /// HARQ process id
  uint8_t harq_id;
  /// ACK bits (after decoding)
  uint8_t ack;
  /// send status (for PUCCH)
  uint8_t send_harq_status;
  /// nCCE (for PUCCH)
  uint8_t nCCE;
} harq_status_t;

typedef struct {
  /// RNTI
  uint16_t rnti;
  /// Active flag for DLSCH demodulation
  uint8_t active;
  /// Transmission mode
  uint8_t mode1_flag;
  /// amplitude of PDSCH (compared to RS) in symbols without pilots
  int16_t sqrt_rho_a;
  /// amplitude of PDSCH (compared to RS) in symbols containing pilots
  int16_t sqrt_rho_b;
  /// Current HARQ process id
  uint8_t current_harq_pid;
  /// Current subband antenna selection
  uint32_t antenna_alloc;
  /// Current subband RI allocation
  uint32_t ri_alloc;
  /// Current subband CQI1 allocation
  uint32_t cqi_alloc1;
  /// Current subband CQI2 allocation
  uint32_t cqi_alloc2;
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  /// saved subband PMI allocation from last PUSCH/PUCCH report
  uint16_t pmi_alloc;
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  /// HARQ-ACKs
  harq_status_t harq_ack[10];
  /// Pointers to up to 8 HARQ processes
  LTE_DL_UE_HARQ_t *harq_processes[8];   
  /// Layer index for this DLSCH
  uint8_t layer_index;              
  /// Maximum number of HARQ rounds (for definition see 36-212 V8.6 2009-03, p.17
  uint8_t Mdlharq;              
  /// MIMO transmission mode indicator for this sub-frame (for definition see 36-212 V8.6 2009-03, p.17)
  uint8_t Kmimo;
  /// Maximum number of Turbo iterations
  uint8_t max_turbo_iterations;
} LTE_UE_DLSCH_t;

typedef enum {format0,
	      format1,
	      format1A,
	      format1A_RA,
	      format1B,
	      format1C,
	      format1D,
	      format1E_2A_M10PRB,
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	      format2,
	      format2A,
	      format2B,
	      format2C,
	      format2D,
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	      format3
} DCI_format_t;

typedef enum {
  SI_PDSCH=0,
  RA_PDSCH,
  PDSCH,
  PMCH
} PDSCH_t;

typedef enum {
  pucch_format1=0,
  pucch_format1a,
  pucch_format1b,
  pucch_format2,
  pucch_format2a,
  pucch_format2b
} PUCCH_FMT_t;


typedef struct {
  /// Length of DCI in bits
  uint8_t dci_length;
  /// Aggregation level 
  uint8_t L;
  /// Position of first CCE of the dci
  unsigned int nCCE;
  /// flag to indicate that this is a RA response
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  boolean_t ra_flag;
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  /// rnti
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  rnti_t rnti;
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  /// Format
  DCI_format_t format;
  /// DCI pdu
  uint8_t dci_pdu[8];
} DCI_ALLOC_t;


/**@}*/
#endif