ULSCH decoding functionality at gNB side

Added the following structs and enums in "defs_gNB.h"
- NR_UL_gNB_HARQ_t
- NR_gNB_ULSCH_t
- NR_SCH_status_t

added the following structs in "nfapi_nr_interface.h"
- nfapi_nr_ul_config_ulsch_pdu
- nfapi_nr_ul_config_ulsch_pdu_rel15_t
- nfapi_nr_ul_srs_config_t
- nr_pusch_freq_hopping_t

added nr_ulsch.h for the ulsch decoding function declarations
- free_gNB_ulsch
- new_gNB_ulsch
- nr_ulsch_decoding

added nr_ulsch_decoding.c for the implementation of the ulsch decoding functions
- free_gNB_ulsch
- new_gNB_ulsch
- nr_ulsch_decoding

cmake_targets/CMakeLists.txt

@@ -1275,6 +1275,7 @@ set(PHY_SRC_UE
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_dlsch.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_dlsch_tools.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_dlsch_coding.c
+  ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_ulsch_decoding.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_tbs_tools.c
   ${OPENAIR1_DIR}/PHY/NR_TRANSPORT/nr_sch_dmrs.c
   ${OPENAIR1_DIR}/PHY/NR_REFSIG/nr_gold.c

nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface.h

@@ -673,4 +673,45 @@ typedef struct {
   nfapi_vendor_extension_tlv_t vendor_extension;
 } nfapi_nr_dl_config_request_t;
 
+
+typedef enum {nr_pusch_freq_hopping_disabled = 0 , 
+              nr_pusch_freq_hopping_enabled = 1
+              } nr_pusch_freq_hopping_t;
+
+typedef struct{
+    uint8_t aperiodicSRS_ResourceTrigger;
+} nfapi_nr_ul_srs_config_t;
+
+typedef struct {
+    uint8_t bandwidth_part_ind;
+    uint16_t number_rbs;
+    uint16_t start_rb;
+    uint8_t frame_offset;
+    uint16_t number_symbols;
+    uint16_t start_symbol;
+    nr_pusch_freq_hopping_t pusch_freq_hopping;
+    uint8_t mcs;
+    uint8_t Qm;
+    uint8_t ndi;
+    uint8_t rv;
+    uint8_t harq_process_nbr;
+    int8_t accumulated_delta_PUSCH;
+    int8_t absolute_delta_PUSCH;
+    uint8_t n_layers;
+    uint8_t tpmi;
+    uint8_t n_dmrs_cdm_groups;
+    uint8_t dmrs_ports[4];
+    uint8_t n_front_load_symb;
+    nfapi_nr_ul_srs_config_t srs_config;
+    uint8_t csi_reportTriggerSize;
+    uint8_t maxCodeBlockGroupsPerTransportBlock;
+    uint8_t ptrs_dmrs_association_port;
+    uint8_t beta_offset_ind;
+} nfapi_nr_ul_config_ulsch_pdu_rel15_t;
+
+typedef struct {
+  uint16_t rnti;
+  nfapi_nr_ul_config_ulsch_pdu_rel15_t ulsch_pdu_rel15;
+} nfapi_nr_ul_config_ulsch_pdu;
+
 #endif

openair1/PHY/NR_TRANSPORT/nr_ulsch.h

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.0  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+/*! \file PHY/NR_TRANSPORT/nr_ulsch.h
+* \brief functions used for PUSCH/ULSCH physical and transport channels for gNB
+* \author Ahmed Hussein
+* \date 2019
+* \version 0.1
+* \company Fraunhofer IIS
+* \email: ahmed.hussein@iis.fraunhofer.de
+* \note
+* \warning
+*/
+
+#include "PHY/defs_gNB.h"
+
+void free_gNB_ulsch(NR_gNB_ULSCH_t *ulsch);
+
+NR_gNB_ULSCH_t *new_gNB_ulsch(uint8_t max_ldpc_iterations,uint8_t N_RB_UL, uint8_t abstraction_flag);
+
+uint32_t nr_ulsch_decoding(PHY_VARS_gNB *phy_vars_gNB,
+                           uint8_t UE_id,
+                           short *ulsch_llr,
+                           NR_DL_FRAME_PARMS *frame_parms,
+                           uint32_t frame,
+                           uint16_t nb_symb_sch,
+                           uint8_t nr_tti_rx,
+                           uint8_t harq_pid,
+                           uint8_t is_crnti,
+                           uint8_t llr8_flag);
+

openair1/PHY/defs_gNB.h

@@ -38,6 +38,10 @@
 #include "CODING/nrPolar_tools/nr_polar_pbch_defs.h"
 #include "openair2/NR_PHY_INTERFACE/NR_IF_Module.h"
 #include "PHY/NR_TRANSPORT/nr_transport_common_proto.h"
+#include "PHY/impl_defs_top.h"
+#include "PHY/defs_common.h"
+#include "PHY/CODING/nrLDPC_decoder/nrLDPC_decoder.h"
+#include "PHY/CODING/nrLDPC_decoder/nrLDPC_types.h"
 
 #define MAX_NUM_RU_PER_gNB MAX_NUM_RU_PER_eNB
 
@@ -72,6 +76,7 @@ typedef struct {
   uint64_t dci_pdu[2];
 } NR_gNB_DCI_ALLOC_t;
 
+
 typedef struct {
   uint8_t     num_dci;
   uint8_t     num_pdsch_rnti;
@@ -79,6 +84,14 @@ typedef struct {
 } NR_gNB_PDCCH;
 
 
+typedef enum {
+  NR_SCH_IDLE,
+  NR_ACTIVE,
+  NR_CBA_ACTIVE,
+  NR_DISABLED
+} NR_SCH_status_t;
+
+
 typedef struct {
   /// Nfapi DLSCH PDU
   nfapi_nr_dl_config_dlsch_pdu dlsch_pdu;
@@ -114,7 +127,6 @@ typedef struct {
 
 
 typedef struct {
-
   /// Pointers to 16 HARQ processes for the DLSCH
   NR_DL_gNB_HARQ_t *harq_processes[NR_MAX_NB_HARQ_PROCESSES];
   /// TX buffers for UE-spec transmission (antenna ports 5 or 7..14, prior to precoding)
@@ -160,6 +172,170 @@ typedef struct {
 } NR_gNB_DLSCH_t;
 
 
+typedef struct {
+  /// Nfapi ULSCH PDU
+  nfapi_nr_ul_config_ulsch_pdu ulsch_pdu;
+  /// Frame where current HARQ round was sent
+  uint32_t frame;
+  /// Subframe where current HARQ round was sent
+  uint32_t subframe;
+  /// Index of current HARQ round for this DLSCH
+  uint8_t round;
+  /// Last TPC command
+  uint8_t TPC;
+  /// MIMO mode for this DLSCH
+  MIMO_mode_t mimo_mode;
+  /// 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)
+  NR_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;
+  /// First Allocated RB - previous scheduling. This is needed for PHICH generation which is done after a new scheduling
+  uint16_t previous_first_rb;
+  /// Flag to indicate that the UL configuration has been handled. Used to remove a stale ULSCH when frame wraps around
+  uint8_t handled;
+  /// Flag to indicate that this ULSCH is for calibration information sent from UE (i.e. no MAC SDU to pass up)
+  //  int calibration_flag;
+  /// delta_TF for power control
+  int32_t delta_TF;
+
+  
+  /////////////////////// ulsch decoding ///////////////////////
+  /// Transport block size (This is A from 38.212 V15.4.0 section 5.1)
+  uint32_t TBS;
+  /// Pointer to the payload (38.212 V15.4.0 section 5.1)
+  uint8_t *b;
+  /// The payload + CRC (24 bits) in bits (38.212 V15.4.0 section 5.1)
+  uint32_t B;
+  /// Pointers to code blocks after code block segmentation and CRC attachment (38.212 V15.4.0 section 5.2.2)
+  uint8_t *c[MAX_NUM_NR_ULSCH_SEGMENTS];
+  /// Number of bits in each code block (38.212 V15.4.0 section 5.2.2)
+  uint32_t K;
+  /// Number of "Filler" bits added in the code block segmentation (38.212 V15.4.0 section 5.2.2)
+  uint32_t F;
+  /// Number of code blocks after code block segmentation (38.212 V15.4.0 section 5.2.2)
+  uint32_t C;
+  /// Pointers to code blocks after LDPC coding (38.212 V15.4.0 section 5.3.2)
+  int16_t *d[MAX_NUM_NR_ULSCH_SEGMENTS];
+  /// LDPC processing buffer
+  t_nrLDPC_procBuf* p_nrLDPC_procBuf[MAX_NUM_NR_ULSCH_SEGMENTS];
+  /// LDPC lifting size (38.212 V15.4.0 table 5.3.2-1)
+  uint32_t Z;
+  /// code blocks after bit selection in rate matching for LDPC code (38.212 V15.4.0 section 5.4.2.1)
+  int16_t e[MAX_NUM_NR_DLSCH_SEGMENTS][3*8448];
+  /// Number of bits in each code block after rate matching for LDPC code (38.212 V15.4.0 section 5.4.2.1)
+  uint32_t E;
+  /// Number of soft channel bits after code block concatenation (38.212 V15.4.0 section 5.5)
+  uint32_t G;
+  //////////////////////////////////////////////////////////////
+
+
+  /////////////////////////// DMRS /////////////////////////////
+  /// 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;
+  /// n_DMRS  for cyclic shift of DMRS (36.213 Table 9.1.2-2) - previous scheduling
+  /// This is needed for PHICH generation which
+  /// is done after a new scheduling
+  uint8_t previous_n_DMRS;
+  //////////////////////////////////////////////////////////////
+
+
+  ///////////////////// UCI multiplexing ///////////////////////
+  /// 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];
+  /// Length of ACK information (bits)
+  uint8_t O_ACK;
+  /// The value of DAI in DCI format 0
+  uint8_t V_UL_DAI;
+  /// "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];
+  /// Temporary h sequence to flag PUSCH_x/PUSCH_y symbols which are not scrambled
+  uint8_t h[MAX_NUM_CHANNEL_BITS];
+  /// 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)];
+  //////////////////////////////////////////////////////////////
+} NR_UL_gNB_HARQ_t;
+
+
+typedef struct {
+  /// Pointers to 16 HARQ processes for the ULSCH
+  NR_UL_gNB_HARQ_t *harq_processes[NR_MAX_ULSCH_HARQ_PROCESSES];
+  /// Current HARQ process id
+  int harq_process_id[NR_MAX_SLOTS_PER_FRAME];
+  /// HARQ process mask, indicates which processes are currently active
+  uint16_t harq_mask;
+  /// 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 gNB awaits UE Msg3
+  uint8_t Msg3_active;
+  /// Flag to indicate that gNB should decode UE Msg3
+  uint8_t Msg3_flag;
+  /// Subframe for Msg3
+  uint8_t Msg3_subframe;
+  /// Frame for Msg3
+  uint32_t Msg3_frame;
+  /// Allocated RNTI for this ULSCH
+  uint16_t rnti;
+  /// RNTI type
+  uint8_t rnti_type;
+  /// cyclic shift for DM RS
+  uint8_t cyclicShift;
+  /// for cooperative communication
+  uint8_t cooperation_flag;
+  /// Maximum number of HARQ rounds
+  uint8_t Mlimit;
+  /// Maximum number of LDPC iterations
+  uint8_t max_ldpc_iterations;
+  /// number of iterations used in last LDPC decoding
+  uint8_t last_iteration_cnt;  
+  /// num active cba group
+  uint8_t num_active_cba_groups;
+  /// num active cba group
+  uint16_t cba_rnti[NUM_MAX_CBA_GROUP];
+} NR_gNB_ULSCH_t;
+
+
 typedef struct {
   /// \brief Pointers (dynamic) to the received data in the time domain.
   /// - first index: rx antenna [0..nb_antennas_rx[
@@ -394,17 +570,18 @@ typedef struct PHY_VARS_gNB_s {
   LTE_eNB_PHICH       phich_vars[2];
 
   NR_gNB_COMMON       common_vars;
-  LTE_eNB_UCI          uci_vars[NUMBER_OF_UE_MAX];
-  LTE_eNB_SRS          srs_vars[NUMBER_OF_UE_MAX];
-  LTE_eNB_PUSCH       *pusch_vars[NUMBER_OF_UE_MAX];
-  LTE_eNB_PRACH        prach_vars;
-  NR_gNB_DLSCH_t     *dlsch[NUMBER_OF_UE_MAX][2];   // Nusers times two spatial streams
-  LTE_eNB_ULSCH_t     *ulsch[NUMBER_OF_UE_MAX+1];      // Nusers + number of RA
+  LTE_eNB_UCI         uci_vars[NUMBER_OF_UE_MAX];
+  LTE_eNB_SRS         srs_vars[NUMBER_OF_UE_MAX];
+  LTE_eNB_PUSCH      *pusch_vars[NUMBER_OF_UE_MAX];
+  LTE_eNB_PRACH       prach_vars;
+  NR_gNB_DLSCH_t     *dlsch[NUMBER_OF_UE_MAX][2];    // Nusers times two spatial streams
+  NR_gNB_ULSCH_t     *ulsch[NUMBER_OF_UE_MAX+1][2];  // [Nusers times + number of RA][2 codewords], index 0 in [NUMBER_OF_UE_MAX+1] is for RA
+  // LTE_eNB_ULSCH_t     *ulsch[NUMBER_OF_UE_MAX+1];     // Nusers + number of RA
   NR_gNB_DLSCH_t     *dlsch_SI,*dlsch_ra,*dlsch_p;
   NR_gNB_DLSCH_t     *dlsch_MCH;
   NR_gNB_DLSCH_t     *dlsch_PCH;
-  LTE_eNB_UE_stats     UE_stats[NUMBER_OF_UE_MAX];
-  LTE_eNB_UE_stats    *UE_stats_ptr[NUMBER_OF_UE_MAX];
+  LTE_eNB_UE_stats    UE_stats[NUMBER_OF_UE_MAX];
+  LTE_eNB_UE_stats   *UE_stats_ptr[NUMBER_OF_UE_MAX];
 
   uint8_t pbch_configured;
   uint8_t pbch_pdu[4]; //PBCH_PDU_SIZE