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openairinterface5g/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
T
Thomas Schlichter 225a500b3e Merge branch 'develop' into NR_RRC_PRACH_procedures 
Conflicts:
	executables/nr-ue.c
	openair1/PHY/NR_REFSIG/dmrs_nr.c
	openair1/PHY/NR_TRANSPORT/nr_prach.c
	openair1/PHY/NR_TRANSPORT/nr_transport_common_proto.h
	openair1/PHY/NR_TRANSPORT/nr_transport_proto_common.h
	openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c
	openair1/PHY/NR_UE_TRANSPORT/nr_transport_ue.h
	openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c
	openair1/SCHED_NR_UE/fapi_nr_ue_l1.c
	openair1/SIMULATION/NR_PHY/prachsim.c
	openair1/SIMULATION/NR_PHY/ulsim.c
	openair2/LAYER2/NR_MAC_COMMON/nr_mac_extern.h
	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c
	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c
2020-06-03 19:50:54 +02:00

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/*
* 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 "LAYER2/NR_MAC_gNB/mac_proto.h"
void free_nr_ue_ulsch(NR_UE_ULSCH_t **ulschptr,unsigned char N_RB_UL)
{
int i, r;
NR_UE_ULSCH_t *ulsch = *ulschptr;
if (ulsch) {
#ifdef DEBUG_ULSCH_FREE
printf("Freeing ulsch %p\n",ulsch);
#endif
uint16_t a_segments = MAX_NUM_NR_ULSCH_SEGMENTS; //number of segments to be allocated
if (N_RB_UL != 273) {
a_segments = a_segments*N_RB_UL;
a_segments = a_segments/273;
}
for (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 (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;
}
}
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,
uint8_t abstraction_flag)
{
NR_UE_ULSCH_t *ulsch;
unsigned char exit_flag = 0,i,r;
uint16_t a_segments = MAX_NUM_NR_ULSCH_SEGMENTS; //number of segments to be allocated
if (N_RB_UL != 273) {
a_segments = a_segments*N_RB_UL;
a_segments = a_segments/273;
}
uint16_t ulsch_bytes = a_segments*1056; // allocated bytes per segment
ulsch = (NR_UE_ULSCH_t *)malloc16(sizeof(NR_UE_ULSCH_t));
if (ulsch) {
memset(ulsch,0,sizeof(NR_UE_ULSCH_t));
ulsch->number_harq_processes_for_pusch = NR_MAX_ULSCH_HARQ_PROCESSES;
ulsch->Mlimit = 4; // maximum harq retransmissions
//for (i=0; i<10; i++)
//ulsch->harq_ids[i] = 0;
for (i=0; i<number_of_harq_pids; i++) {
ulsch->harq_processes[i] = (NR_UL_UE_HARQ_t *)malloc16(sizeof(NR_UL_UE_HARQ_t));
// printf("ulsch->harq_processes[%d] %p\n",i,ulsch->harq_processes[i]);
if (ulsch->harq_processes[i]) {
memset(ulsch->harq_processes[i], 0, sizeof(NR_UL_UE_HARQ_t));
ulsch->harq_processes[i]->b = (uint8_t*)malloc16(ulsch_bytes);
ulsch->harq_processes[i]->a = (unsigned char*)malloc16(ulsch_bytes);
if (ulsch->harq_processes[i]->a) {
bzero(ulsch->harq_processes[i]->a,ulsch_bytes);
} else {
printf("Can't allocate PDU\n");
exit_flag=1;
}
if (ulsch->harq_processes[i]->b)
bzero(ulsch->harq_processes[i]->b,ulsch_bytes);
else {
LOG_E(PHY,"Can't get b\n");
exit_flag=1;
}
if (abstraction_flag==0) {
for (r=0; r<a_segments; r++) {
// account for filler in first segment and CRCs for multiple segment case
ulsch->harq_processes[i]->c[r] = (uint8_t*)malloc16(8448);
ulsch->harq_processes[i]->d[r] = (uint8_t*)malloc16(68*384); //max size for coded output
if (ulsch->harq_processes[i]->c[r]) {
bzero(ulsch->harq_processes[i]->c[r],8448);
} else {
printf("Can't get c\n");
exit_flag=2;
}
if (ulsch->harq_processes[i]->d[r]) {
bzero(ulsch->harq_processes[i]->d[r],(68*384));
} else {
printf("Can't get d\n");
exit_flag=2;
}
}
ulsch->harq_processes[i]->e = (uint8_t*)malloc16(14*N_RB_UL*12*8);
if (ulsch->harq_processes[i]->e) {
bzero(ulsch->harq_processes[i]->e,14*N_RB_UL*12*8);
} else {
printf("Can't get e\n");
exit_flag=1;
}
ulsch->harq_processes[i]->f = (uint8_t*)malloc16(14*N_RB_UL*12*8);
if (ulsch->harq_processes[i]->f) {
bzero(ulsch->harq_processes[i]->f,14*N_RB_UL*12*8);
} else {
printf("Can't get f\n");
exit_flag=1;
}
}
ulsch->harq_processes[i]->subframe_scheduling_flag = 0;
ulsch->harq_processes[i]->first_tx = 1;
} else {
LOG_E(PHY,"Can't get harq_p %d\n",i);
exit_flag=3;
}
}
if (exit_flag==0) {
for (i=0; i<number_of_harq_pids; i++) {
ulsch->harq_processes[i]->round=0;
}
return(ulsch);
}
}
LOG_E(PHY,"new_ue_ulsch exit flag, size of %d , %zu\n",exit_flag, sizeof(LTE_UE_ULSCH_t));
free_nr_ue_ulsch(&ulsch,N_RB_UL);
return(NULL);
}
int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
NR_DL_FRAME_PARMS* frame_parms,
uint8_t harq_pid,
unsigned int G)
{
/////////////////////////parameters and variables declaration/////////////////////////
///////////
unsigned int crc;
NR_UL_UE_HARQ_t *harq_process;
uint16_t nb_rb ;
uint32_t A, Z, F;
uint32_t *pz;
uint8_t mod_order;
uint16_t Kr,r;
uint32_t r_offset;
uint8_t BG;
uint32_t E,Kb;
uint8_t Ilbrm;
uint32_t Tbslbrm;
uint16_t R;
float Coderate;
///////////
///////////////////////////////////////////////////////////////////////////////////////
/////////////////////////parameters and variables initialization/////////////////////////
///////////
crc = 1;
harq_process = ulsch->harq_processes[harq_pid];
nb_rb = harq_process->pusch_pdu.rb_size;
A = harq_process->pusch_pdu.pusch_data.tb_size;
pz = &Z;
mod_order = nr_get_Qm_ul(harq_process->pusch_pdu.mcs_index, harq_process->pusch_pdu.mcs_table);
R = nr_get_code_rate_ul(harq_process->pusch_pdu.mcs_index, harq_process->pusch_pdu.mcs_table);
Kr=0;
r_offset=0;
BG = 1;
F=0;
Ilbrm = 0;
Tbslbrm = 950984; //max tbs
Coderate = 0.0;
///////////
/////////////////////////////////////////////////////////////////////////////////////////
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_ENCODING, VCD_FUNCTION_IN);
LOG_D(PHY,"ulsch coding nb_rb %d, Nl = %d\n", nb_rb, harq_process->pusch_pdu.nrOfLayers);
LOG_D(PHY,"ulsch coding A %d G %d mod_order %d\n", A,G, mod_order);
// if (harq_process->Ndi == 1) { // this is a new packet
if (harq_process->round == 0) { // this is a new packet
#ifdef DEBUG_DLSCH_CODING
printf("encoding thinks this is a new packet \n");
#endif
///////////////////////// a---->| add CRC |---->b /////////////////////////
///////////
/*
int i;
printf("ulsch (tx): \n");
for (i=0;i<(A>>3);i++)
printf("%02x.",a[i]);
printf("\n");
*/
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_NR_ULSCH_PAYLOAD_BYTES,"A %d is too big (A/8+4 = %d > %d)\n",A,(A/8)+4,MAX_NR_ULSCH_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_NR_ULSCH_PAYLOAD_BYTES,"A %d is too big (A/8+3 = %d > %d)\n",A,(A/8)+3,MAX_NR_ULSCH_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 (R<1024)
Coderate = (float) R /(float) 1024;
else
Coderate = (float) R /(float) 2048;
if ((A <=292) || ((A<=3824) && (Coderate <= 0.6667)) || Coderate <= 0.25){
BG = 2;
}
else{
BG = 1;
}
Kb=nr_segmentation(harq_process->b,
harq_process->c,
harq_process->B,
&harq_process->C,
&harq_process->K,
pz,
&harq_process->F,
BG);
F = harq_process->F;
Kr = harq_process->K;
#ifdef DEBUG_DLSCH_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 (r=0; r<harq_process->C; r++) {
//channel_input[r] = &harq_process->d[r][0];
#ifdef DEBUG_DLSCH_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]);
int temp_opp = 0;
if (opp_enabled) {
opp_enabled = 0;
temp_opp = 1;
}
/*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;
impp.n_segments=harq_process->C;
impp.macro_num=0;
nrLDPC_encoder(harq_process->c,harq_process->d,*pz,Kb,Kr,BG,&impp);
//stop_meas(te_stats);
//printf("end ldpc encoder -- output\n");
#ifdef DEBUG_DLSCH_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
if (temp_opp) opp_enabled = 1;
///////////
///////////////////////////////////////////////////////////////////////////////
}
for (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]);
}
}
#ifdef DEBUG_DLSCH_CODING
printf("Rate Matching, Code segment %d (coded bits (G) %u, unpunctured/repeated bits per code segment %d, mod_order %d, nb_rb %d)...\n",
r,
G,
Kr*3,
mod_order,nb_rb);
#endif
//start_meas(rm_stats);
#ifdef DEBUG_DLSCH_CODING
printf("rvidx in encoding = %d\n", harq_process->pusch_pdu.pusch_data.rv_index);
#endif
///////////////////////// d---->| Rate matching bit selection |---->e /////////////////////////
///////////
E = nr_get_E(G, harq_process->C, mod_order, harq_process->pusch_pdu.nrOfLayers, r);
Tbslbrm = nr_compute_tbslbrm(0,nb_rb,harq_process->pusch_pdu.nrOfLayers,harq_process->C);
nr_rate_matching_ldpc(Ilbrm,
Tbslbrm,
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);
#ifdef DEBUG_DLSCH_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);
nr_interleaving_ldpc(E,
mod_order,
harq_process->e+r_offset,
harq_process->f+r_offset);
//stop_meas(i_stats);
#ifdef DEBUG_DLSCH_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;
///////////
///////////////////////////////////////////////////////////////////////////////////////////////
}
memcpy(ulsch->g,harq_process->f,G); // g is the concatenated code block
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_ENB_DLSCH_ENCODING, VCD_FUNCTION_OUT);
return(0);
}
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