maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
a9060cd38244389f2b34fed8112862e18b01ea13
openairinterface5g/openair1/PHY/NR_UE_TRANSPORT/nr_dlsch_decoding.c
T

441 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 1.0 (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_UE_TRANSPORT/nr_dlsch_decoding.c
* \brief Top-level routines for decoding Turbo-coded (DLSCH) transport channels from 36-212, V8.6 2009-03
* \author R. Knopp
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/
#include "common/utils/LOG/vcd_signal_dumper.h"
#include "PHY/defs_nr_UE.h"
#include "SCHED_NR_UE/harq_nr.h"
#include "PHY/phy_extern_nr_ue.h"
#include "PHY/CODING/coding_extern.h"
#include "PHY/CODING/coding_defs.h"
#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
#include "SCHED_NR_UE/defs.h"
#include "SIMULATION/TOOLS/sim.h"
#include "executables/nr-uesoftmodem.h"
#include "PHY/CODING/nrLDPC_extern.h"
#include "common/utils/nr/nr_common.h"
#include "openair1/PHY/TOOLS/phy_scope_interface.h"
#include "nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface.h"
//#define ENABLE_PHY_PAYLOAD_DEBUG 1
#define OAI_UL_LDPC_MAX_NUM_LLR 27000//26112 // NR_LDPC_NCOL_BG1*NR_LDPC_ZMAX = 68*384
//#define OAI_LDPC_MAX_NUM_LLR 27000//26112 // NR_LDPC_NCOL_BG1*NR_LDPC_ZMAX
static extended_kpi_ue kpiStructure = {0};
extended_kpi_ue* getKPIUE(void) {
return &kpiStructure;
}
void nr_ue_dlsch_init(NR_UE_DLSCH_t *dlsch_list, int num_dlsch, uint8_t max_ldpc_iterations) {
for (int i=0; i < num_dlsch; i++) {
NR_UE_DLSCH_t *dlsch = dlsch_list + i;
memset(dlsch, 0, sizeof(NR_UE_DLSCH_t));
dlsch->max_ldpc_iterations = max_ldpc_iterations;
}
}
void nr_dlsch_unscrambling(int16_t *llr, uint32_t size, uint8_t q, uint32_t Nid, uint32_t n_RNTI)
{
nr_codeword_unscrambling(llr, size, q, Nid, n_RNTI);
}
static bool nr_ue_postDecode(PHY_VARS_NR_UE *phy_vars_ue,
notifiedFIFO_elt_t *req,
notifiedFIFO_t *nf_p,
const bool last,
int b_size,
uint8_t b[b_size],
int *num_seg_ok,
const UE_nr_rxtx_proc_t *proc)
{
ldpcDecode_ue_t *rdata = (ldpcDecode_ue_t*) NotifiedFifoData(req);
NR_DL_UE_HARQ_t *harq_process = rdata->harq_process;
NR_UE_DLSCH_t *dlsch = (NR_UE_DLSCH_t *) rdata->dlsch;
int r = rdata->segment_r;
merge_meas(&phy_vars_ue->phy_cpu_stats.cpu_time_stats[DLSCH_DEINTERLEAVING_STATS], &rdata->ts_deinterleave);
merge_meas(&phy_vars_ue->phy_cpu_stats.cpu_time_stats[DLSCH_RATE_UNMATCHING_STATS], &rdata->ts_rate_unmatch);
merge_meas(&phy_vars_ue->phy_cpu_stats.cpu_time_stats[DLSCH_LDPC_DECODING_STATS], &rdata->ts_ldpc_decode);
bool decodeSuccess = (rdata->decodeIterations < (1+dlsch->max_ldpc_iterations));
if (decodeSuccess) {
memcpy(b+rdata->offset,
harq_process->c[r],
rdata->Kr_bytes - (harq_process->F>>3) -((harq_process->C>1)?3:0));
(*num_seg_ok)++;
} else {
LOG_D(PHY, "DLSCH %d in error\n", rdata->dlsch_id);
}
if (!last)
return false; // continue decoding
// all segments are done
kpiStructure.nb_total++;
kpiStructure.blockSize = dlsch->dlsch_config.TBS;
kpiStructure.dl_mcs = dlsch->dlsch_config.mcs;
kpiStructure.nofRBs = dlsch->dlsch_config.number_rbs;
harq_process->decodeResult = *num_seg_ok == harq_process->C;
if (harq_process->decodeResult && harq_process->C > 1) {
/* check global CRC */
int A = dlsch->dlsch_config.TBS;
// we have regrouped the transport block
if (!check_crc(b, lenWithCrc(1, A), crcType(1, A))) {
LOG_E(PHY,
" Frame %d.%d LDPC global CRC fails, but individual LDPC CRC succeeded. %d segs\n",
proc->frame_rx,
proc->nr_slot_rx,
harq_process->C);
harq_process->decodeResult = false;
}
}
if (harq_process->decodeResult) {
// We search only a reccuring OAI error that propagates all 0 packets with a 0 CRC, so we
const int sz = dlsch->dlsch_config.TBS / 8;
if (b[sz] == 0 && b[sz + 1] == 0) {
// do the check only if the 2 first bytes of the CRC are 0 (it can be CRC16 or CRC24)
int i = 0;
while (b[i] == 0 && i < sz)
i++;
if (i == sz) {
LOG_E(PHY,
"received all 0 pdu, consider it false reception, even if the TS 38.212 7.2.1 says only we should attach the "
"corresponding CRC, and nothing prevents to have a all 0 packet\n");
harq_process->decodeResult = false;
}
}
}
if (harq_process->decodeResult) {
LOG_D(PHY, "DLSCH received ok \n");
harq_process->status = SCH_IDLE;
dlsch->last_iteration_cnt = rdata->decodeIterations;
} else {
LOG_D(PHY, "DLSCH received nok \n");
kpiStructure.nb_nack++;
dlsch->last_iteration_cnt = dlsch->max_ldpc_iterations + 1;
}
return true; // end TB decoding
}
static void nr_processDLSegment(void *arg)
{
ldpcDecode_ue_t *rdata = (ldpcDecode_ue_t*) arg;
NR_UE_DLSCH_t *dlsch = rdata->dlsch;
NR_DL_UE_HARQ_t *harq_process= rdata->harq_process;
t_nrLDPC_dec_params *p_decoderParms = &rdata->decoderParms;
int r = rdata->segment_r;
int E = rdata->E;
int Qm = rdata->Qm;
int r_offset = rdata->r_offset;
uint8_t kc = rdata->Kc;
uint32_t Tbslbrm = rdata->Tbslbrm;
short* dlsch_llr = rdata->dlsch_llr;
int8_t LDPCoutput[OAI_UL_LDPC_MAX_NUM_LLR] __attribute__((aligned(32)));
int16_t z[68 * 384 + 16] __attribute__((aligned(16)));
int8_t l [68*384 + 16] __attribute__ ((aligned(16)));
const int Kr = harq_process->K;
const int K_bits_F = Kr - harq_process->F;
t_nrLDPC_time_stats procTime = {0};
//if we return before LDPC decoder run, the block is in error
rdata->decodeIterations = dlsch->max_ldpc_iterations + 1;
start_meas(&rdata->ts_deinterleave);
//VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DEINTERLEAVING, VCD_FUNCTION_IN);
int16_t w[E];
nr_deinterleaving_ldpc(E,
Qm,
w, // [hna] w is e
dlsch_llr+r_offset);
//VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DEINTERLEAVING, VCD_FUNCTION_OUT);
stop_meas(&rdata->ts_deinterleave);
start_meas(&rdata->ts_rate_unmatch);
/* LOG_D(PHY,"HARQ_PID %d Rate Matching Segment %d (coded bits %d,E %d, F %d,unpunctured/repeated bits %d, TBS %d, mod_order %d, nb_rb %d, Nl %d, rv %d, round %d)...\n",
harq_pid,r, G,E,harq_process->F,
Kr*3,
harq_process->TBS,
Qm,
harq_process->nb_rb,
harq_process->Nl,
harq_process->rvidx,
harq_process->round); */
//VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_RATE_MATCHING, VCD_FUNCTION_IN);
if (nr_rate_matching_ldpc_rx(Tbslbrm,
p_decoderParms->BG,
p_decoderParms->Z,
harq_process->d[r],
w,
harq_process->C,
dlsch->dlsch_config.rv,
harq_process->first_rx,
E,
harq_process->F,
Kr-harq_process->F-2*(p_decoderParms->Z))==-1) {
//VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_RATE_MATCHING, VCD_FUNCTION_OUT);
stop_meas(&rdata->ts_rate_unmatch);
LOG_E(PHY,"dlsch_decoding.c: Problem in rate_matching\n");
return;
}
stop_meas(&rdata->ts_rate_unmatch);
if (LOG_DEBUGFLAG(DEBUG_DLSCH_DECOD)) {
LOG_D(PHY,"decoder input(segment %u) :",r);
for (int i=0; i<E; i++)
LOG_D(PHY,"%d : %d\n",i,harq_process->d[r][i]);
LOG_D(PHY,"\n");
}
{
start_meas(&rdata->ts_ldpc_decode);
//set first 2*Z_c bits to zeros
memset(z,0,2*harq_process->Z*sizeof(int16_t));
//set Filler bits
memset((z+K_bits_F),127,harq_process->F*sizeof(int16_t));
//Move coded bits before filler bits
memcpy((z+2*harq_process->Z),harq_process->d[r],(K_bits_F-2*harq_process->Z)*sizeof(int16_t));
//skip filler bits
memcpy((z+Kr),harq_process->d[r]+(Kr-2*harq_process->Z),(kc*harq_process->Z-Kr)*sizeof(int16_t));
//Saturate coded bits before decoding into 8 bits values
simde__m128i *pv = (simde__m128i*)&z;
simde__m128i *pl = (simde__m128i*)&l;
for (int i=0, j=0; j < ((kc*harq_process->Z)>>4)+1; i+=2, j++) {
pl[j] = simde_mm_packs_epi16(pv[i],pv[i+1]);
}
//VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_LDPC, VCD_FUNCTION_IN);
uint32_t A = dlsch->dlsch_config.TBS;
p_decoderParms->E = lenWithCrc(harq_process->C, A);
p_decoderParms->crc_type = crcType(harq_process->C, A);
rdata->decodeIterations =
ldpc_interface.LDPCdecoder(p_decoderParms, 0, 0, 0, l, LDPCoutput, &procTime, &harq_process->abort_decode);
//VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_LDPC, VCD_FUNCTION_OUT);
if (rdata->decodeIterations <= dlsch->max_ldpc_iterations)
memcpy(harq_process->c[r], LDPCoutput, Kr >> 3);
stop_meas(&rdata->ts_ldpc_decode);
}
}
uint32_t nr_dlsch_decoding(PHY_VARS_NR_UE *phy_vars_ue,
const UE_nr_rxtx_proc_t *proc,
int eNB_id,
short *dlsch_llr,
NR_DL_FRAME_PARMS *frame_parms,
NR_UE_DLSCH_t *dlsch,
NR_DL_UE_HARQ_t *harq_process,
uint32_t frame,
uint16_t nb_symb_sch,
uint8_t nr_slot_rx,
uint8_t harq_pid,
int b_size,
uint8_t b[b_size],
int G)
{
uint32_t ret,offset;
uint32_t r,r_offset=0,Kr=8424,Kr_bytes;
t_nrLDPC_dec_params decParams;
decParams.check_crc = check_crc;
if (!harq_process) {
LOG_E(PHY,"dlsch_decoding.c: NULL harq_process pointer\n");
return(dlsch->max_ldpc_iterations + 1);
}
// HARQ stats
LOG_D(PHY, "Round %d RV idx %d\n", harq_process->DLround, dlsch->dlsch_config.rv);
uint16_t nb_rb;// = 30;
uint8_t dmrs_Type = dlsch->dlsch_config.dmrsConfigType;
AssertFatal(dmrs_Type == 0 || dmrs_Type == 1, "Illegal dmrs_type %d\n", dmrs_Type);
uint8_t nb_re_dmrs;
if (dmrs_Type==NFAPI_NR_DMRS_TYPE1) {
nb_re_dmrs = 6*dlsch->dlsch_config.n_dmrs_cdm_groups;
} else {
nb_re_dmrs = 4*dlsch->dlsch_config.n_dmrs_cdm_groups;
}
uint16_t dmrs_length = get_num_dmrs(dlsch->dlsch_config.dlDmrsSymbPos);
vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_SEGMENTATION, VCD_FUNCTION_IN);
//NR_DL_UE_HARQ_t *harq_process = dlsch->harq_processes[0];
if (!dlsch_llr) {
LOG_E(PHY,"dlsch_decoding.c: NULL dlsch_llr pointer\n");
return(dlsch->max_ldpc_iterations + 1);
}
if (!frame_parms) {
LOG_E(PHY,"dlsch_decoding.c: NULL frame_parms pointer\n");
return(dlsch->max_ldpc_iterations + 1);
}
nb_rb = dlsch->dlsch_config.number_rbs;
uint32_t A = dlsch->dlsch_config.TBS;
ret = dlsch->max_ldpc_iterations + 1;
dlsch->last_iteration_cnt = ret;
// target_code_rate is in 0.1 units
float Coderate = (float) dlsch->dlsch_config.targetCodeRate / 10240.0f;
decParams.BG = dlsch->dlsch_config.ldpcBaseGraph;
unsigned int kc = decParams.BG == 2 ? 52 : 68;
if (harq_process->first_rx == 1) {
// This is a new packet, so compute quantities regarding segmentation
nr_segmentation(NULL,
NULL,
lenWithCrc(1, A), // We give a max size in case of 1 segment
&harq_process->C,
&harq_process->K,
&harq_process->Z, // [hna] Z is Zc
&harq_process->F,
decParams.BG);
if (harq_process->C > MAX_NUM_NR_DLSCH_SEGMENTS_PER_LAYER * dlsch->Nl) {
LOG_E(PHY, "nr_segmentation.c: too many segments %d, A %d\n", harq_process->C, A);
return(-1);
}
if (LOG_DEBUGFLAG(DEBUG_DLSCH_DECOD) && (!frame%100))
LOG_I(PHY,"K %d C %d Z %d nl %d \n", harq_process->K, harq_process->C, harq_process->Z, dlsch->Nl);
// clear HARQ buffer
for (int i=0; i <harq_process->C; i++)
memset(harq_process->d[i],0,5*8448*sizeof(int16_t));
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_SEGMENTATION, VCD_FUNCTION_OUT);
decParams.Z = harq_process->Z;
decParams.numMaxIter = dlsch->max_ldpc_iterations;
decParams.outMode = 0;
r_offset = 0;
uint16_t a_segments = MAX_NUM_NR_DLSCH_SEGMENTS_PER_LAYER * dlsch->Nl; //number of segments to be allocated
if (nb_rb != 273) {
a_segments = a_segments*nb_rb;
a_segments = a_segments/273 +1;
}
if (harq_process->C > a_segments) {
LOG_E(PHY,"Illegal harq_process->C %d > %d\n",harq_process->C,a_segments);
return((1+dlsch->max_ldpc_iterations));
}
if (LOG_DEBUGFLAG(DEBUG_DLSCH_DECOD))
LOG_I(PHY,"Segmentation: C %d, K %d\n",harq_process->C,harq_process->K);
Kr = harq_process->K;
Kr_bytes = Kr>>3;
offset = 0;
notifiedFIFO_t nf;
initNotifiedFIFO(&nf);
set_abort(&harq_process->abort_decode, false);
for (r=0; r<harq_process->C; r++) {
//printf("start rx segment %d\n",r);
uint32_t E = nr_get_E(G, harq_process->C, dlsch->dlsch_config.qamModOrder, dlsch->Nl, r);
decParams.R = nr_get_R_ldpc_decoder(dlsch->dlsch_config.rv, E, decParams.BG, decParams.Z, &harq_process->llrLen, harq_process->DLround);
union ldpcReqUnion id = {.s = {dlsch->rnti, frame, nr_slot_rx, 0, 0}};
notifiedFIFO_elt_t *req = newNotifiedFIFO_elt(sizeof(ldpcDecode_ue_t), id.p, &nf, &nr_processDLSegment);
ldpcDecode_ue_t * rdata=(ldpcDecode_ue_t *) NotifiedFifoData(req);
rdata->phy_vars_ue = phy_vars_ue;
rdata->harq_process = harq_process;
rdata->decoderParms = decParams;
rdata->dlsch_llr = dlsch_llr;
rdata->Kc = kc;
rdata->segment_r = r;
rdata->E = E;
rdata->Qm = dlsch->dlsch_config.qamModOrder;
rdata->r_offset = r_offset;
rdata->Kr_bytes = Kr_bytes;
rdata->rv_index = dlsch->dlsch_config.rv;
rdata->Tbslbrm = dlsch->dlsch_config.tbslbrm;
rdata->offset = offset;
rdata->dlsch = dlsch;
rdata->dlsch_id = harq_pid;
reset_meas(&rdata->ts_deinterleave);
reset_meas(&rdata->ts_rate_unmatch);
reset_meas(&rdata->ts_ldpc_decode);
pushTpool(&get_nrUE_params()->Tpool,req);
LOG_D(PHY, "Added a block to decode, in pipe: %d\n", r);
r_offset += E;
offset += (Kr_bytes - (harq_process->F>>3) - ((harq_process->C>1)?3:0));
//////////////////////////////////////////////////////////////////////////////////////////
}
int num_seg_ok = 0;
int nbDecode = harq_process->C;
while (nbDecode) {
notifiedFIFO_elt_t *req=pullTpool(&nf, &get_nrUE_params()->Tpool);
if (req == NULL)
break; // Tpool has been stopped
nr_ue_postDecode(phy_vars_ue, req, &nf, nbDecode == 1, b_size, b, &num_seg_ok, proc);
delNotifiedFIFO_elt(req);
nbDecode--;
}
LOG_D(PHY,
"%d.%d DLSCH Decoded, harq_pid %d, round %d, result: %d TBS %d (%d) G %d nb_re_dmrs %d length dmrs %d mcs %d Nl %d "
"nb_symb_sch %d "
"nb_rb %d Qm %d Coderate %f\n",
frame,
nr_slot_rx,
harq_pid,
harq_process->DLround,
harq_process->decodeResult,
A,
A / 8,
G,
nb_re_dmrs,
dmrs_length,
dlsch->dlsch_config.mcs,
dlsch->Nl,
nb_symb_sch,
nb_rb,
dlsch->dlsch_config.qamModOrder,
Coderate);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_COMBINE_SEG, VCD_FUNCTION_OUT);
ret = dlsch->last_iteration_cnt;
return(ret);
}
Reference in New Issue View Git Blame Copy Permalink