maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
51483a3223d8b8b4fc4f5eb9171bbe20c60859e5
openairinterface5g/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
T

449 lines
16 KiB
C
Raw Blame History

/*
* 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 1.1 (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_UE_TRANSPORT/nr_ulsch_coding.c
* \brief Top-level routines for coding the ULSCH transport channel as described in 38.212 V15.4 2018-12
* \author Khalid Ahmed
* \date 2019
* \version 0.1
* \company Fraunhofer IIS
* \email: khalid.ahmed@iis.fraunhofer.de
* \note
* \warning
*/
#include "PHY/defs_UE.h"
#include "PHY/phy_extern_ue.h"
#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
#include "PHY/CODING/coding_defs.h"
#include "PHY/CODING/coding_extern.h"
#include "PHY/CODING/lte_interleaver_inline.h"
#include "PHY/CODING/nrLDPC_extern.h"
#include "PHY/NR_UE_TRANSPORT/nr_transport_ue.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#include <openair2/UTIL/OPT/opt.h>
//#define DEBUG_ULSCH_CODING
void free_nr_ue_ulsch(NR_UE_ULSCH_t **ulschptr,
uint16_t N_RB_UL,
NR_DL_FRAME_PARMS* frame_parms) {
NR_UE_ULSCH_t *ulsch = *ulschptr;
if (ulsch) {
#ifdef DEBUG_ULSCH_FREE
printf("Freeing ulsch %p\n",ulsch);
#endif
int max_layers = (frame_parms->nb_antennas_tx<NR_MAX_NB_LAYERS) ? frame_parms->nb_antennas_tx : NR_MAX_NB_LAYERS;
uint16_t a_segments = MAX_NUM_NR_ULSCH_SEGMENTS_PER_LAYER*max_layers; //number of segments to be allocated
if (N_RB_UL != 273) {
a_segments = a_segments*N_RB_UL;
a_segments = a_segments/273 +1;
}
for (int i=0; i<NR_MAX_ULSCH_HARQ_PROCESSES; i++) {
if (ulsch->harq_processes[i]) {
if (ulsch->harq_processes[i]->a) {
free16(ulsch->harq_processes[i]->a,a_segments*1056);
ulsch->harq_processes[i]->a = NULL;
}
if (ulsch->harq_processes[i]->b) {
free16(ulsch->harq_processes[i]->b,a_segments*1056);
ulsch->harq_processes[i]->b = NULL;
}
if (ulsch->harq_processes[i]->e) {
free16(ulsch->harq_processes[i]->e,14*N_RB_UL*12*8);
ulsch->harq_processes[i]->e = NULL;
}
if (ulsch->harq_processes[i]->f) {
free16(ulsch->harq_processes[i]->f,14*N_RB_UL*12*8);
ulsch->harq_processes[i]->f = NULL;
}
for (int r=0; r<a_segments; r++) {
if (ulsch->harq_processes[i]->c[r]) {
free16(ulsch->harq_processes[i]->c[r],((r==0)?8:0) + 3+768);
ulsch->harq_processes[i]->c[r] = NULL;
}
if (ulsch->harq_processes[i]->d[r]) {
free16(ulsch->harq_processes[i]->d[r],68*384);
ulsch->harq_processes[i]->d[r] = NULL;
}
}
if (ulsch->harq_processes[i]->c) {
free16(ulsch->harq_processes[i]->c,a_segments);
ulsch->harq_processes[i]->c = NULL;
}
if (ulsch->harq_processes[i]->d) {
free16(ulsch->harq_processes[i]->d,a_segments);
ulsch->harq_processes[i]->d = NULL;
}
free16(ulsch->harq_processes[i],sizeof(NR_UL_UE_HARQ_t));
ulsch->harq_processes[i] = NULL;
}
}
free16(ulsch,sizeof(NR_UE_ULSCH_t));
*ulschptr = NULL;
}
}
NR_UE_ULSCH_t *new_nr_ue_ulsch(uint16_t N_RB_UL, int number_of_harq_pids, NR_DL_FRAME_PARMS* frame_parms) {
int max_layers = (frame_parms->nb_antennas_tx<NR_MAX_NB_LAYERS) ? frame_parms->nb_antennas_tx : NR_MAX_NB_LAYERS;
uint16_t a_segments = MAX_NUM_NR_ULSCH_SEGMENTS_PER_LAYER*max_layers; //number of segments to be allocated
if (N_RB_UL != 273) {
a_segments = a_segments*N_RB_UL;
a_segments = a_segments/273 +1;
}
uint32_t ulsch_bytes = a_segments*1056; // allocated bytes per segment
NR_UE_ULSCH_t *ulsch = malloc16(sizeof(NR_UE_ULSCH_t));
DevAssert(ulsch);
memset(ulsch, 0, sizeof(*ulsch));
ulsch->number_harq_processes_for_pusch = NR_MAX_ULSCH_HARQ_PROCESSES;
for (int i = 0; i < number_of_harq_pids; i++) {
ulsch->harq_processes[i] = malloc16(sizeof(NR_UL_UE_HARQ_t));
DevAssert(ulsch->harq_processes[i]);
memset(ulsch->harq_processes[i], 0, sizeof(NR_UL_UE_HARQ_t));
ulsch->harq_processes[i]->a = malloc16(ulsch_bytes);
DevAssert(ulsch->harq_processes[i]->a);
bzero(ulsch->harq_processes[i]->a,ulsch_bytes);
ulsch->harq_processes[i]->b = malloc16(ulsch_bytes);
DevAssert(ulsch->harq_processes[i]->b);
bzero(ulsch->harq_processes[i]->b,ulsch_bytes);
ulsch->harq_processes[i]->c = malloc16(a_segments*sizeof(uint8_t *));
ulsch->harq_processes[i]->d = malloc16(a_segments*sizeof(uint16_t *));
for (int r = 0; r < a_segments; r++) {
// account for filler in first segment and CRCs for multiple segment case
ulsch->harq_processes[i]->c[r] = malloc16(8448);
DevAssert(ulsch->harq_processes[i]->c[r]);
bzero(ulsch->harq_processes[i]->c[r],8448);
ulsch->harq_processes[i]->d[r] = malloc16(68*384); //max size for coded output
DevAssert(ulsch->harq_processes[i]->d[r]);
bzero(ulsch->harq_processes[i]->d[r],(68*384));
}
ulsch->harq_processes[i]->e = malloc16(14*N_RB_UL*12*8);
DevAssert(ulsch->harq_processes[i]->e);
bzero(ulsch->harq_processes[i]->e,14*N_RB_UL*12*8);
ulsch->harq_processes[i]->f = malloc16(14*N_RB_UL*12*8);
DevAssert(ulsch->harq_processes[i]->f);
bzero(ulsch->harq_processes[i]->f,14*N_RB_UL*12*8);
ulsch->harq_processes[i]->subframe_scheduling_flag = 0;
ulsch->harq_processes[i]->first_tx = 1;
}
return(ulsch);
}
int nr_ulsch_encoding(PHY_VARS_NR_UE *ue,
NR_UE_ULSCH_t *ulsch,
NR_DL_FRAME_PARMS* frame_parms,
uint8_t harq_pid,
unsigned int G) {
start_meas(&ue->ulsch_encoding_stats);
/////////////////////////parameters and variables initialization/////////////////////////
///////////
unsigned int crc = 1;
NR_UL_UE_HARQ_t *harq_process = ulsch->harq_processes[harq_pid];
uint16_t nb_rb = harq_process->pusch_pdu.rb_size;
uint32_t A = harq_process->pusch_pdu.pusch_data.tb_size<<3;
uint32_t *pz = &harq_process->Z;
uint8_t mod_order = harq_process->pusch_pdu.qam_mod_order;
uint16_t Kr=0;
uint32_t r_offset=0;
uint32_t F=0;
// target_code_rate is in 0.1 units
float Coderate = (float) harq_process->pusch_pdu.target_code_rate / 10240.0f;
///////////
/////////////////////////////////////////////////////////////////////////////////////////
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_UE_ULSCH_ENCODING, VCD_FUNCTION_IN);
LOG_D(NR_PHY, "ulsch coding nb_rb %d, Nl = %d\n", nb_rb, harq_process->pusch_pdu.nrOfLayers);
LOG_D(NR_PHY, "ulsch coding A %d G %d mod_order %d Coderate %f\n", A, G, mod_order, Coderate);
LOG_D(NR_PHY, "harq_pid %d harq_process->ndi %d, pusch_data.new_data_indicator %d\n",
harq_pid,harq_process->ndi,harq_process->pusch_pdu.pusch_data.new_data_indicator);
if (harq_process->first_tx == 1 ||
harq_process->ndi != harq_process->pusch_pdu.pusch_data.new_data_indicator) { // this is a new packet
#ifdef DEBUG_ULSCH_CODING
printf("encoding thinks this is a new packet \n");
#endif
harq_process->first_tx = 0;
///////////////////////// a---->| add CRC |---->b /////////////////////////
///////////
/*
int i;
printf("ulsch (tx): \n");
for (i=0;i<(A>>3);i++)
printf("%02x.",harq_process->a[i]);
printf("\n");
*/
int max_payload_bytes = MAX_NUM_NR_ULSCH_SEGMENTS_PER_LAYER*harq_process->pusch_pdu.nrOfLayers*1056;
if (A > 3824) {
// Add 24-bit crc (polynomial A) to payload
crc = crc24a(harq_process->a,A)>>8;
harq_process->a[A>>3] = ((uint8_t*)&crc)[2];
harq_process->a[1+(A>>3)] = ((uint8_t*)&crc)[1];
harq_process->a[2+(A>>3)] = ((uint8_t*)&crc)[0];
//printf("CRC %x (A %d)\n",crc,A);
//printf("a0 %d a1 %d a2 %d\n", a[A>>3], a[1+(A>>3)], a[2+(A>>3)]);
harq_process->B = A+24;
AssertFatal((A/8)+4 <= max_payload_bytes,"A %d is too big (A/8+4 = %d > %d)\n",A,(A/8)+4,max_payload_bytes);
memcpy(harq_process->b,harq_process->a,(A/8)+4);
}
else {
// Add 16-bit crc (polynomial A) to payload
crc = crc16(harq_process->a,A)>>16;
harq_process->a[A>>3] = ((uint8_t*)&crc)[1];
harq_process->a[1+(A>>3)] = ((uint8_t*)&crc)[0];
//printf("CRC %x (A %d)\n",crc,A);
//printf("a0 %d a1 %d \n", a[A>>3], a[1+(A>>3)]);
harq_process->B = A+16;
AssertFatal((A/8)+3 <= max_payload_bytes,"A %d is too big (A/8+3 = %d > %d)\n",A,(A/8)+3,max_payload_bytes);
memcpy(harq_process->b,harq_process->a,(A/8)+3); // using 3 bytes to mimic the case of 24 bit crc
}
///////////
///////////////////////////////////////////////////////////////////////////
///////////////////////// b---->| block segmentation |---->c /////////////////////////
///////////
if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25){
harq_process->BG = 2;
}
else{
harq_process->BG = 1;
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_SEGMENTATION, VCD_FUNCTION_IN);
start_meas(&ue->ulsch_segmentation_stats);
uint32_t Kb=nr_segmentation(harq_process->b,
harq_process->c,
harq_process->B,
&harq_process->C,
&harq_process->K,
pz,
&harq_process->F,
harq_process->BG);
if (harq_process->C>MAX_NUM_NR_DLSCH_SEGMENTS_PER_LAYER*harq_process->pusch_pdu.nrOfLayers) {
LOG_E(PHY,"nr_segmentation.c: too many segments %d, B %d\n",harq_process->C,harq_process->B);
return(-1);
}
stop_meas(&ue->ulsch_segmentation_stats);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_SEGMENTATION, VCD_FUNCTION_OUT);
F = harq_process->F;
Kr = harq_process->K;
#ifdef DEBUG_ULSCH_CODING
uint16_t Kr_bytes;
Kr_bytes = Kr>>3;
#endif
///////////////////////// c---->| LDCP coding |---->d /////////////////////////
///////////
//printf("segment Z %d k %d Kr %d BG %d\n", *pz,harq_process->K,Kr,BG);
//start_meas(te_stats);
for (int r=0; r<harq_process->C; r++) {
//channel_input[r] = &harq_process->d[r][0];
#ifdef DEBUG_ULSCH_CODING
printf("Encoder: B %d F %d \n",harq_process->B, harq_process->F);
printf("start ldpc encoder segment %d/%d\n",r,harq_process->C);
printf("input %d %d %d %d %d \n", harq_process->c[r][0], harq_process->c[r][1], harq_process->c[r][2],harq_process->c[r][3], harq_process->c[r][4]);
for (int cnt =0 ; cnt < 22*(*pz)/8; cnt ++){
printf("%d ", harq_process->c[r][cnt]);
}
printf("\n");
#endif
//ldpc_encoder_orig((unsigned char*)harq_process->c[r],harq_process->d[r],Kr,BG,0);
//ldpc_encoder_optim((unsigned char*)harq_process->c[r],(unsigned char*)&harq_process->d[r][0],Kr,BG,NULL,NULL,NULL,NULL);
}
//for (int i=0;i<68*384;i++)
// printf("channel_input[%d]=%d\n",i,channel_input[i]);
/*printf("output %d %d %d %d %d \n", harq_process->d[0][0], harq_process->d[0][1], harq_process->d[r][2],harq_process->d[0][3], harq_process->d[0][4]);
for (int cnt =0 ; cnt < 66*(*pz); cnt ++){
printf("%d \n", harq_process->d[0][cnt]);
}
printf("\n");*/
encoder_implemparams_t impp = {
.n_segments=harq_process->C,
.macro_num=0,
.tinput = NULL,
.tprep = NULL,
.tparity = NULL,
.toutput = NULL};
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_LDPC_ENCODER_OPTIM, VCD_FUNCTION_IN);
start_meas(&ue->ulsch_ldpc_encoding_stats);
for(int j = 0; j < (harq_process->C/8 + 1); j++) {
impp.macro_num = j;
nrLDPC_encoder(harq_process->c,harq_process->d,*pz,Kb,Kr,harq_process->BG,&impp);
}
stop_meas(&ue->ulsch_ldpc_encoding_stats);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_LDPC_ENCODER_OPTIM, VCD_FUNCTION_OUT);
//stop_meas(te_stats);
//printf("end ldpc encoder -- output\n");
#ifdef DEBUG_ULSCH_CODING
write_output("ulsch_enc_input0.m","enc_in0",&harq_process->c[0][0],Kr_bytes,1,4);
write_output("ulsch_enc_output0.m","enc0",&harq_process->d[0][0],(3*8*Kr_bytes)+12,1,4);
#endif
///////////
///////////////////////////////////////////////////////////////////////////////
LOG_D(PHY,"setting ndi to %d from pusch_data\n", harq_process->pusch_pdu.pusch_data.new_data_indicator);
harq_process->ndi = harq_process->pusch_pdu.pusch_data.new_data_indicator;
}
F = harq_process->F;
Kr = harq_process->K;
for (int r=0; r<harq_process->C; r++) { // looping over C segments
if (harq_process->F>0) {
for (int k=(Kr-F-2*(*pz)); k<Kr-2*(*pz); k++) {
harq_process->d[r][k] = NR_NULL;
//if (k<(Kr-F+8))
//printf("r %d filler bits [%d] = %d \n", r,k, harq_process->d[r][k]);
}
}
LOG_D(PHY,"Rate Matching, Code segment %d (coded bits (G) %u, unpunctured/repeated bits per code segment %d, mod_order %d, nb_rb %d, rvidx %d)...\n",
r,
G,
Kr*3,
mod_order,nb_rb,
harq_process->pusch_pdu.pusch_data.rv_index);
//start_meas(rm_stats);
///////////////////////// d---->| Rate matching bit selection |---->e /////////////////////////
///////////
uint32_t E = nr_get_E(G, harq_process->C, mod_order, harq_process->pusch_pdu.nrOfLayers, r);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_RATE_MATCHING_LDPC, VCD_FUNCTION_IN);
start_meas(&ue->ulsch_rate_matching_stats);
if (nr_rate_matching_ldpc(harq_process->pusch_pdu.tbslbrm,
harq_process->BG,
*pz,
harq_process->d[r],
harq_process->e+r_offset,
harq_process->C,
F,
Kr-F-2*(*pz),
harq_process->pusch_pdu.pusch_data.rv_index,
E) == -1)
return -1;
stop_meas(&ue->ulsch_rate_matching_stats);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_RATE_MATCHING_LDPC, VCD_FUNCTION_OUT);
#ifdef DEBUG_ULSCH_CODING
for (int i =0; i<16; i++)
printf("output ratematching e[%d]= %d r_offset %d\n", i,harq_process->e[i+r_offset], r_offset);
#endif
///////////
///////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////// e---->| Rate matching bit interleaving |---->f /////////////////////////
///////////
//stop_meas(rm_stats);
//start_meas(i_stats);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_INTERLEAVING_LDPC, VCD_FUNCTION_IN);
start_meas(&ue->ulsch_interleaving_stats);
nr_interleaving_ldpc(E,
mod_order,
harq_process->e+r_offset,
harq_process->f+r_offset);
stop_meas(&ue->ulsch_interleaving_stats);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_INTERLEAVING_LDPC, VCD_FUNCTION_OUT);
//stop_meas(i_stats);
#ifdef DEBUG_ULSCH_CODING
for (int i =0; i<16; i++)
printf("output interleaving f[%d]= %d r_offset %d\n", i,harq_process->f[i+r_offset], r_offset);
if (r==harq_process->C-1)
write_output("enc_output.m","enc",harq_process->f,G,1,4);
#endif
r_offset += E;
///////////
///////////////////////////////////////////////////////////////////////////////////////////////
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_NR_UE_ULSCH_ENCODING, VCD_FUNCTION_OUT);
stop_meas(&ue->ulsch_encoding_stats);
return(0);
}
Reference in New Issue View Git Blame Copy Permalink