/*
* 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/LTE_TRANSPORT/ulsch_decoding.c
* \brief Top-level routines for decoding the ULSCH transport channel from 36.212 V8.6 2009-03
* \author R. Knopp
* \date 2011
* \version 0.1
* \company Eurecom
* \email: knopp@eurecom.fr
* \note
* \warning
*/
#include <syscall.h>
#include "PHY/defs_eNB.h"
#include "PHY/phy_extern.h"
#include "PHY/CODING/coding_extern.h"
#include "SCHED/sched_eNB.h"
#include "LAYER2/MAC/mac.h"
#include "RRC/LTE/rrc_extern.h"
#include "PHY_INTERFACE/phy_interface.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
//#define DEBUG_ULSCH_DECODING
#include "targets/RT/USER/rt_wrapper.h"
#include "transport_proto.h"
extern WORKER_CONF_t get_thread_worker_conf(void);
void free_eNB_ulsch(LTE_eNB_ULSCH_t *ulsch)
{
int i,r;
if (ulsch) {
for (i=0; i<8; i++) {
if (ulsch->harq_processes[i]) {
if (ulsch->harq_processes[i]->b) {
free16(ulsch->harq_processes[i]->b,MAX_ULSCH_PAYLOAD_BYTES);
ulsch->harq_processes[i]->b = NULL;
}
for (r=0; r<MAX_NUM_ULSCH_SEGMENTS; r++) {
free16(ulsch->harq_processes[i]->c[r],((r==0)?8:0) + 768);
ulsch->harq_processes[i]->c[r] = NULL;
}
for (r=0; r<MAX_NUM_ULSCH_SEGMENTS; r++)
if (ulsch->harq_processes[i]->d[r]) {
free16(ulsch->harq_processes[i]->d[r],((3*8*6144)+12+96)*sizeof(short));
ulsch->harq_processes[i]->d[r] = NULL;
}
free16(ulsch->harq_processes[i],sizeof(LTE_UL_eNB_HARQ_t));
ulsch->harq_processes[i] = NULL;
}
}
free16(ulsch,sizeof(LTE_eNB_ULSCH_t));
ulsch = NULL;
}
}
LTE_eNB_ULSCH_t *new_eNB_ulsch(uint8_t max_turbo_iterations,uint8_t N_RB_UL, uint8_t abstraction_flag)
{
LTE_eNB_ULSCH_t *ulsch;
uint8_t exit_flag = 0,i,r;
unsigned char bw_scaling =1;
switch (N_RB_UL) {
case 6:
bw_scaling =16;
break;
case 25:
bw_scaling =4;
break;
case 50:
bw_scaling =2;
break;
default:
bw_scaling =1;
break;
}
ulsch = (LTE_eNB_ULSCH_t *)malloc16(sizeof(LTE_eNB_ULSCH_t));
if (ulsch) {
memset(ulsch,0,sizeof(LTE_eNB_ULSCH_t));
ulsch->max_turbo_iterations = max_turbo_iterations;
ulsch->Mlimit = 4;
for (i=0; i<8; i++) {
// printf("new_ue_ulsch: Harq process %d\n",i);
ulsch->harq_processes[i] = (LTE_UL_eNB_HARQ_t *)malloc16(sizeof(LTE_UL_eNB_HARQ_t));
if (ulsch->harq_processes[i]) {
memset(ulsch->harq_processes[i],0,sizeof(LTE_UL_eNB_HARQ_t));
ulsch->harq_processes[i]->b = (uint8_t*)malloc16(MAX_ULSCH_PAYLOAD_BYTES/bw_scaling);
if (ulsch->harq_processes[i]->b)
memset(ulsch->harq_processes[i]->b,0,MAX_ULSCH_PAYLOAD_BYTES/bw_scaling);
else
exit_flag=3;
if (abstraction_flag==0) {
for (r=0; r<MAX_NUM_ULSCH_SEGMENTS/bw_scaling; r++) {
ulsch->harq_processes[i]->c[r] = (uint8_t*)malloc16(((r==0)?8:0) + 3+768);
if (ulsch->harq_processes[i]->c[r])
memset(ulsch->harq_processes[i]->c[r],0,((r==0)?8:0) + 3+768);
else
exit_flag=2;
ulsch->harq_processes[i]->d[r] = (short*)malloc16(((3*8*6144)+12+96)*sizeof(short));
if (ulsch->harq_processes[i]->d[r])
memset(ulsch->harq_processes[i]->d[r],0,((3*8*6144)+12+96)*sizeof(short));
else
exit_flag=2;
}
}
} else {
exit_flag=1;
}
}
if (exit_flag==0)
return(ulsch);
}
LOG_E(PHY,"new_ue_ulsch: exit_flag = %d\n",exit_flag);
free_eNB_ulsch(ulsch);
return(NULL);
}
void clean_eNb_ulsch(LTE_eNB_ULSCH_t *ulsch)
{
unsigned char i;
//ulsch = (LTE_eNB_ULSCH_t *)malloc16(sizeof(LTE_eNB_ULSCH_t));
if (ulsch) {
ulsch->rnti = 0;
ulsch->harq_mask = 0;
for (i=0; i<8; i++) {
if (ulsch->harq_processes[i]) {
// ulsch->harq_processes[i]->Ndi = 0;
ulsch->harq_processes[i]->status = 0;
//ulsch->harq_processes[i]->phich_active = 0; //this will be done later after transmission of PHICH
ulsch->harq_processes[i]->phich_ACK = 0;
ulsch->harq_processes[i]->round = 0;
ulsch->harq_processes[i]->rar_alloc = 0;
ulsch->harq_processes[i]->first_rb = 0;
ulsch->harq_processes[i]->nb_rb = 0;
ulsch->harq_processes[i]->TBS = 0;
ulsch->harq_processes[i]->Or1 = 0;
ulsch->harq_processes[i]->Or2 = 0;
for ( int j = 0; j < 2; j++ ) {
ulsch->harq_processes[i]->o_RI[j] = 0;
}
ulsch->harq_processes[i]->O_ACK = 0;
ulsch->harq_processes[i]->srs_active = 0;
ulsch->harq_processes[i]->rvidx = 0;
ulsch->harq_processes[i]->Msc_initial = 0;
ulsch->harq_processes[i]->Nsymb_initial = 0;
}
}
ulsch->beta_offset_cqi_times8 = 0;
ulsch->beta_offset_ri_times8 = 0;
ulsch->beta_offset_harqack_times8 = 0;
ulsch->Msg3_active = 0;
}
}
uint8_t extract_cqi_crc(uint8_t *cqi,uint8_t CQI_LENGTH)
{
uint8_t crc;
crc = cqi[CQI_LENGTH>>3];
// printf("crc1: %x, shift %d\n",crc,CQI_LENGTH&0x7);
crc = (crc<<(CQI_LENGTH&0x7));
// clear crc bits
// ((char *)cqi)[CQI_LENGTH>>3] &= 0xff>>(8-(CQI_LENGTH&0x7));
// printf("crc2: %x, cqi0 %x\n",crc,cqi[1+(CQI_LENGTH>>3)]);
crc |= (cqi[1+(CQI_LENGTH>>3)])>>(8-(CQI_LENGTH&0x7));
// clear crc bits
//(((char *)cqi)[1+(CQI_LENGTH>>3)]) = 0;
// printf("crc : %x\n",crc);
return(crc);
}
int ulsch_decoding_data_2thread0(td_params* tdp) {
PHY_VARS_eNB *eNB = tdp->eNB;
int UE_id = tdp->UE_id;
int harq_pid = tdp->harq_pid;
int llr8_flag = tdp->llr8_flag;
unsigned int r,r_offset=0,Kr,Kr_bytes;
uint8_t crc_type;
int offset = 0;
int ret = 1;
int16_t dummy_w[MAX_NUM_ULSCH_SEGMENTS][3*(6144+64)];
LTE_eNB_ULSCH_t *ulsch = eNB->ulsch[UE_id];
LTE_UL_eNB_HARQ_t *ulsch_harq = ulsch->harq_processes[harq_pid];
int Q_m = ulsch_harq->Qm;
int G = ulsch_harq->G;
uint32_t E=0;
uint32_t Gp,GpmodC,Nl=1;
uint32_t C = ulsch_harq->C;
decoder_if_t *tc;
if (llr8_flag == 0)
tc = decoder16;
else
tc = decoder8;
// go through first half of segments to get r_offset
for (r=0; r<(ulsch_harq->C/2); r++) {
// Get Turbo interleaver parameters
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
Kr_bytes = Kr>>3;
// This is stolen from rate-matching algorithm to get the value of E
Gp = G/Nl/Q_m;
GpmodC = Gp%C;
if (r < (C-(GpmodC)))
E = Nl*Q_m * (Gp/C);
else
E = Nl*Q_m * ((GpmodC==0?0:1) + (Gp/C));
r_offset += E;
if (r==0) {
offset = Kr_bytes - (ulsch_harq->F>>3) - ((ulsch_harq->C>1)?3:0);
} else {
offset += (Kr_bytes- ((ulsch_harq->C>1)?3:0));
}
}
// go through second half of segments
for (; r<(ulsch_harq->C); r++) {
// printf("before subblock deinterleaving c[%d] = %p\n",r,ulsch_harq->c[r]);
// Get Turbo interleaver parameters
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
Kr_bytes = Kr>>3;
memset(&dummy_w[r][0],0,3*(6144+64)*sizeof(short));
ulsch_harq->RTC[r] = generate_dummy_w(4+(Kr_bytes*8),
(uint8_t*)&dummy_w[r][0],
(r==0) ? ulsch_harq->F : 0);
#ifdef DEBUG_ULSCH_DECODING
printf("Rate Matching Segment %d (coded bits (G) %d,unpunctured/repeated bits %d, Q_m %d, nb_rb %d, Nl %d)...\n",
r, G,
Kr*3,
Q_m,
nb_rb,
ulsch_harq->Nl);
#endif
if (lte_rate_matching_turbo_rx(ulsch_harq->RTC[r],
G,
ulsch_harq->w[r],
(uint8_t*) &dummy_w[r][0],
ulsch_harq->e+r_offset,
ulsch_harq->C,
NSOFT,
0, //Uplink
1,
ulsch_harq->rvidx,
(ulsch_harq->round==0)?1:0, // clear
ulsch_harq->Qm,
1,
r,
&E)==-1) {
LOG_E(PHY,"ulsch_decoding.c: Problem in rate matching\n");
return(-1);
}
r_offset += E;
sub_block_deinterleaving_turbo(4+Kr,
&ulsch_harq->d[r][96],
ulsch_harq->w[r]);
if (ulsch_harq->C == 1)
crc_type = CRC24_A;
else
crc_type = CRC24_B;
ret = tc(&ulsch_harq->d[r][96],
NULL,
ulsch_harq->c[r],
NULL,
Kr,
ulsch->max_turbo_iterations,//MAX_TURBO_ITERATIONS,
crc_type,
(r==0) ? ulsch_harq->F : 0,
&eNB->ulsch_tc_init_stats,
&eNB->ulsch_tc_alpha_stats,
&eNB->ulsch_tc_beta_stats,
&eNB->ulsch_tc_gamma_stats,
&eNB->ulsch_tc_ext_stats,
&eNB->ulsch_tc_intl1_stats,
&eNB->ulsch_tc_intl2_stats);
// Reassembly of Transport block here
if (ret != (1+ulsch->max_turbo_iterations)) {
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
Kr_bytes = Kr>>3;
memcpy(ulsch_harq->b+offset,
ulsch_harq->c[r],
Kr_bytes - ((ulsch_harq->C>1)?3:0));
offset += (Kr_bytes- ((ulsch_harq->C>1)?3:0));
} else {
break;
}
}
return(ret);
}
extern int oai_exit;
void *td_thread(void *param) {
PHY_VARS_eNB *eNB = ((td_params*)param)->eNB;
L1_proc_t *proc = &eNB->proc;
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
thread_top_init("td_thread",1,200000,250000,500000);
pthread_setname_np( pthread_self(),"td processing");
LOG_I(PHY,"thread td created id=%ld\n", syscall(__NR_gettid));
//wait_sync("td_thread");
while (!oai_exit) {
if (wait_on_condition(&proc->mutex_td,&proc->cond_td,&proc->instance_cnt_td,"td thread")<0) break;
if(oai_exit) break;
((td_params*)param)->ret = ulsch_decoding_data_2thread0((td_params*)param);
if (release_thread(&proc->mutex_td,&proc->instance_cnt_td,"td thread")<0) break;
if (pthread_cond_signal(&proc->cond_td) != 0) {
printf("[eNB] ERROR pthread_cond_signal for td thread exit\n");
exit_fun( "ERROR pthread_cond_signal" );
return(NULL);
}
}
return(NULL);
}
int ulsch_decoding_data_2thread(PHY_VARS_eNB *eNB,int UE_id,int harq_pid,int llr8_flag) {
L1_proc_t *proc = &eNB->proc;
unsigned int r,r_offset=0,Kr,Kr_bytes;
uint8_t crc_type;
int offset = 0;
int ret = 1;
int16_t dummy_w[MAX_NUM_ULSCH_SEGMENTS][3*(6144+64)];
LTE_eNB_ULSCH_t *ulsch = eNB->ulsch[UE_id];
LTE_UL_eNB_HARQ_t *ulsch_harq = ulsch->harq_processes[harq_pid];
int G = ulsch_harq->G;
unsigned int E;
int Cby2;
decoder_if_t *tc;
struct timespec wait;
wait.tv_sec=0;
wait.tv_nsec=5000000L;
if (llr8_flag == 0)
tc = decoder16;
else
tc = decoder8;
if (ulsch_harq->C>1) { // wakeup worker if more than 1 segment
if (pthread_mutex_timedlock(&proc->mutex_td,&wait) != 0) {
printf("[eNB] ERROR pthread_mutex_lock for TD thread (IC %d)\n", proc->instance_cnt_td);
exit_fun( "error locking mutex_fep" );
return -1;
}
if (proc->instance_cnt_td==0) {
printf("[eNB] TD thread busy\n");
exit_fun("TD thread busy");
pthread_mutex_unlock( &proc->mutex_td );
return -1;
}
++proc->instance_cnt_td;
proc->tdp.eNB = eNB;
proc->tdp.UE_id = UE_id;
proc->tdp.harq_pid = harq_pid;
proc->tdp.llr8_flag = llr8_flag;
// wakeup worker to do second half segments
if (pthread_cond_signal(&proc->cond_td) != 0) {
printf("[eNB] ERROR pthread_cond_signal for td thread exit\n");
exit_fun( "ERROR pthread_cond_signal" );
return (1+ulsch->max_turbo_iterations);
}
pthread_mutex_unlock( &proc->mutex_td );
Cby2 = ulsch_harq->C/2;
}
else {
Cby2 = 1;
}
// go through first half of segments in main thread
for (r=0; r<Cby2; r++) {
// printf("before subblock deinterleaving c[%d] = %p\n",r,ulsch_harq->c[r]);
// Get Turbo interleaver parameters
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
Kr_bytes = Kr>>3;
memset(&dummy_w[r][0],0,3*(6144+64)*sizeof(short));
ulsch_harq->RTC[r] = generate_dummy_w(4+(Kr_bytes*8),
(uint8_t*)&dummy_w[r][0],
(r==0) ? ulsch_harq->F : 0);
#ifdef DEBUG_ULSCH_DECODING
printf("Rate Matching Segment %d (coded bits (G) %d,unpunctured/repeated bits %d, Q_m %d, nb_rb %d, Nl %d)...\n",
r, G,
Kr*3,
Q_m,
nb_rb,
ulsch_harq->Nl);
#endif
start_meas(&eNB->ulsch_rate_unmatching_stats);
if (lte_rate_matching_turbo_rx(ulsch_harq->RTC[r],
G,
ulsch_harq->w[r],
(uint8_t*) &dummy_w[r][0],
ulsch_harq->e+r_offset,
ulsch_harq->C,
NSOFT,
0, //Uplink
1,
ulsch_harq->rvidx,
(ulsch_harq->round==0)?1:0, // clear
ulsch_harq->Qm,
1,
r,
&E)==-1) {
LOG_E(PHY,"ulsch_decoding.c: Problem in rate matching\n");
return(-1);
}
stop_meas(&eNB->ulsch_rate_unmatching_stats);
r_offset += E;
start_meas(&eNB->ulsch_deinterleaving_stats);
sub_block_deinterleaving_turbo(4+Kr,
&ulsch_harq->d[r][96],
ulsch_harq->w[r]);
stop_meas(&eNB->ulsch_deinterleaving_stats);
if (ulsch_harq->C == 1)
crc_type = CRC24_A;
else
crc_type = CRC24_B;
start_meas(&eNB->ulsch_turbo_decoding_stats);
ret = tc(&ulsch_harq->d[r][96],
NULL,
ulsch_harq->c[r],
NULL,
Kr,
ulsch->max_turbo_iterations,//MAX_TURBO_ITERATIONS,
crc_type,
(r==0) ? ulsch_harq->F : 0,
&eNB->ulsch_tc_init_stats,
&eNB->ulsch_tc_alpha_stats,
&eNB->ulsch_tc_beta_stats,
&eNB->ulsch_tc_gamma_stats,
&eNB->ulsch_tc_ext_stats,
&eNB->ulsch_tc_intl1_stats,
&eNB->ulsch_tc_intl2_stats);
// Reassembly of Transport block here
if (ret != (1+ulsch->max_turbo_iterations)) {
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
Kr_bytes = Kr>>3;
if (r==0) {
memcpy(ulsch_harq->b,
&ulsch_harq->c[0][(ulsch_harq->F>>3)],
Kr_bytes - (ulsch_harq->F>>3) - ((ulsch_harq->C>1)?3:0));
offset = Kr_bytes - (ulsch_harq->F>>3) - ((ulsch_harq->C>1)?3:0);
} else {
memcpy(ulsch_harq->b+offset,
ulsch_harq->c[r],
Kr_bytes - ((ulsch_harq->C>1)?3:0));
offset += (Kr_bytes- ((ulsch_harq->C>1)?3:0));
}
} else {
break;
}
stop_meas(&eNB->ulsch_turbo_decoding_stats);
//printf("/////////////////////////////////////////**************************loop for %d time in ulsch_decoding main\n",r);
}
// wait for worker to finish
wait_on_busy_condition(&proc->mutex_td,&proc->cond_td,&proc->instance_cnt_td,"td thread");
return( (ret>proc->tdp.ret) ? ret : proc->tdp.ret );
}
int ulsch_decoding_data(PHY_VARS_eNB *eNB,int UE_id,int harq_pid,int llr8_flag) {
unsigned int r,r_offset=0,Kr,Kr_bytes;
uint8_t crc_type;
int offset = 0;
int ret = 1;
int16_t dummy_w[MAX_NUM_ULSCH_SEGMENTS][3*(6144+64)];
LTE_eNB_ULSCH_t *ulsch = eNB->ulsch[UE_id];
LTE_UL_eNB_HARQ_t *ulsch_harq = ulsch->harq_processes[harq_pid];
int G = ulsch_harq->G;
unsigned int E;
decoder_if_t *tc;
if (llr8_flag == 0)
tc = *decoder16;
else
tc = *decoder8;
for (r=0; r<ulsch_harq->C; r++) {
// printf("before subblock deinterleaving c[%d] = %p\n",r,ulsch_harq->c[r]);
// Get Turbo interleaver parameters
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
Kr_bytes = Kr>>3;
memset(&dummy_w[r][0],0,3*(6144+64)*sizeof(short));
ulsch_harq->RTC[r] = generate_dummy_w(4+(Kr_bytes*8),
(uint8_t*)&dummy_w[r][0],
(r==0) ? ulsch_harq->F : 0);
#ifdef DEBUG_ULSCH_DECODING
printf("Rate Matching Segment %d (coded bits (G) %d,unpunctured/repeated bits %d, Q_m %d, nb_rb %d, Nl %d)...\n",
r, G,
Kr*3,
Q_m,
nb_rb,
ulsch_harq->Nl);
#endif
start_meas(&eNB->ulsch_rate_unmatching_stats);
if (lte_rate_matching_turbo_rx(ulsch_harq->RTC[r],
G,
ulsch_harq->w[r],
(uint8_t*) &dummy_w[r][0],
ulsch_harq->e+r_offset,
ulsch_harq->C,
NSOFT,
0, //Uplink
1,
ulsch_harq->rvidx,
(ulsch_harq->round==0)?1:0, // clear
ulsch_harq->Qm,
1,
r,
&E)==-1) {
LOG_E(PHY,"ulsch_decoding.c: Problem in rate matching\n");
return(-1);
}
stop_meas(&eNB->ulsch_rate_unmatching_stats);
r_offset += E;
start_meas(&eNB->ulsch_deinterleaving_stats);
sub_block_deinterleaving_turbo(4+Kr,
&ulsch_harq->d[r][96],
ulsch_harq->w[r]);
stop_meas(&eNB->ulsch_deinterleaving_stats);
if (ulsch_harq->C == 1)
crc_type = CRC24_A;
else
crc_type = CRC24_B;
start_meas(&eNB->ulsch_turbo_decoding_stats);
ret = tc(&ulsch_harq->d[r][96],
NULL,
ulsch_harq->c[r],
NULL,
Kr,
ulsch->max_turbo_iterations,//MAX_TURBO_ITERATIONS,
crc_type,
(r==0) ? ulsch_harq->F : 0,
&eNB->ulsch_tc_init_stats,
&eNB->ulsch_tc_alpha_stats,
&eNB->ulsch_tc_beta_stats,
&eNB->ulsch_tc_gamma_stats,
&eNB->ulsch_tc_ext_stats,
&eNB->ulsch_tc_intl1_stats,
&eNB->ulsch_tc_intl2_stats);
stop_meas(&eNB->ulsch_turbo_decoding_stats);
// Reassembly of Transport block here
if (ret != (1+ulsch->max_turbo_iterations)) {
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
Kr_bytes = Kr>>3;
if (r==0) {
memcpy(ulsch_harq->b,
&ulsch_harq->c[0][(ulsch_harq->F>>3)],
Kr_bytes - (ulsch_harq->F>>3) - ((ulsch_harq->C>1)?3:0));
offset = Kr_bytes - (ulsch_harq->F>>3) - ((ulsch_harq->C>1)?3:0);
} else {
memcpy(ulsch_harq->b+offset,
ulsch_harq->c[r],
Kr_bytes - ((ulsch_harq->C>1)?3:0));
offset += (Kr_bytes- ((ulsch_harq->C>1)?3:0));
}
} else {
break;
}
}
return(ret);
}
int ulsch_decoding_data_all(PHY_VARS_eNB *eNB,int UE_id,int harq_pid,int llr8_flag)
{
int ret = 0;
/*if(get_thread_worker_conf() == WORKER_ENABLE)
{
ret = ulsch_decoding_data_2thread(eNB,UE_id,harq_pid,llr8_flag);
}
else*/
{
ret = ulsch_decoding_data(eNB,UE_id,harq_pid,llr8_flag);
}
return ret;
}
static inline unsigned int lte_gold_unscram(unsigned int *x1, unsigned int *x2, unsigned char reset) __attribute__((always_inline));
static inline unsigned int lte_gold_unscram(unsigned int *x1, unsigned int *x2, unsigned char reset)
{
int n;
if (reset) {
*x1 = 1+ (1<<31);
*x2=*x2 ^ ((*x2 ^ (*x2>>1) ^ (*x2>>2) ^ (*x2>>3))<<31);
// skip first 50 double words (1600 bits)
// printf("n=0 : x1 %x, x2 %x\n",x1,x2);
for (n=1; n<50; n++) {
*x1 = (*x1>>1) ^ (*x1>>4);
*x1 = *x1 ^ (*x1<<31) ^ (*x1<<28);
*x2 = (*x2>>1) ^ (*x2>>2) ^ (*x2>>3) ^ (*x2>>4);
*x2 = *x2 ^ (*x2<<31) ^ (*x2<<30) ^ (*x2<<29) ^ (*x2<<28);
}
}
*x1 = (*x1>>1) ^ (*x1>>4);
*x1 = *x1 ^ (*x1<<31) ^ (*x1<<28);
*x2 = (*x2>>1) ^ (*x2>>2) ^ (*x2>>3) ^ (*x2>>4);
*x2 = *x2 ^ (*x2<<31) ^ (*x2<<30) ^ (*x2<<29) ^ (*x2<<28);
return(*x1^*x2);
// printf("n=%d : c %x\n",n,x1^x2);
}
unsigned int ulsch_decoding(PHY_VARS_eNB *eNB,eNB_rxtx_proc_t *proc,
uint8_t UE_id,
uint8_t control_only_flag,
uint8_t Nbundled,
uint8_t llr8_flag)
{
int16_t *ulsch_llr = eNB->pusch_vars[UE_id]->llr;
LTE_DL_FRAME_PARMS *frame_parms = &eNB->frame_parms;
LTE_eNB_ULSCH_t *ulsch = eNB->ulsch[UE_id];
uint8_t harq_pid;
unsigned short nb_rb;
unsigned int A;
uint8_t Q_m;
unsigned int i,i2,q,j,j2;
int iprime;
unsigned int ret=0;
// uint8_t dummy_channel_output[(3*8*block_length)+12];
int r,Kr;
uint8_t *columnset;
unsigned int sumKr=0;
unsigned int Qprime,L,G,Q_CQI,Q_RI,H,Hprime,Hpp,Cmux,Rmux_prime,O_RCC;
unsigned int Qprime_ACK,Qprime_RI,len_ACK=0,len_RI=0;
// uint8_t q_ACK[MAX_ACK_PAYLOAD],q_RI[MAX_RI_PAYLOAD];
int metric,metric_new;
uint32_t x1, x2, s=0;
int16_t ys,c;
uint32_t wACK_idx;
uint8_t dummy_w_cc[3*(MAX_CQI_BITS+8+32)];
int16_t y[6*14*1200] __attribute__((aligned(32)));
uint8_t ytag[14*1200];
// uint8_t ytag2[6*14*1200],*ytag2_ptr;
int16_t cseq[6*14*1200] __attribute__((aligned(32)));
int off;
int frame = proc->frame_rx;
int subframe = proc->subframe_rx;
LTE_UL_eNB_HARQ_t *ulsch_harq;
harq_pid = subframe2harq_pid(frame_parms,frame,subframe);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_ULSCH_DECODING0+harq_pid,1);
// x1 is set in lte_gold_generic
x2 = ((uint32_t)ulsch->rnti<<14) + ((uint32_t)subframe<<9) + frame_parms->Nid_cell; //this is c_init in 36.211 Sec 6.3.1
ulsch_harq = ulsch->harq_processes[harq_pid];
AssertFatal(harq_pid!=255,
"FATAL ERROR: illegal harq_pid, returning\n");
AssertFatal(ulsch_harq->Nsymb_pusch != 0,
"FATAL ERROR: harq_pid %d, Nsymb 0!\n",harq_pid);
nb_rb = ulsch_harq->nb_rb;
A = ulsch_harq->TBS;
Q_m = ulsch_harq->Qm;
G = nb_rb * (12 * Q_m) * ulsch_harq->Nsymb_pusch;
//#ifdef DEBUG_ULSCH_DECODING
LOG_D(PHY,"[PUSCH %d] Frame %d, Subframe %d: ulsch_decoding (Nid_cell %d, rnti %x, x2 %x): A %d, round %d, RV %d, O_r1 %d, O_RI %d, O_ACK %d, G %d, Q_m %d Nsymb_pusch %d nb_rb %d\n",
harq_pid,
proc->frame_rx,subframe,
frame_parms->Nid_cell,ulsch->rnti,x2,
A,
ulsch_harq->round,
ulsch_harq->rvidx,
ulsch_harq->Or1,
ulsch_harq->O_RI,
ulsch_harq->O_ACK,
G,
ulsch_harq->Qm,
ulsch_harq->Nsymb_pusch,
nb_rb);
//#endif
//if (ulsch_harq->round == 0) { // delete for RB shortage pattern
// This is a new packet, so compute quantities regarding segmentation
ulsch_harq->B = A+24;
lte_segmentation(NULL,
NULL,
ulsch_harq->B,
&ulsch_harq->C,
&ulsch_harq->Cplus,
&ulsch_harq->Cminus,
&ulsch_harq->Kplus,
&ulsch_harq->Kminus,
&ulsch_harq->F);
// CLEAR LLR's HERE for first packet in process
//}
// printf("after segmentation c[%d] = %p\n",0,ulsch_harq->c[0]);
sumKr = 0;
for (r=0; r<ulsch_harq->C; r++) {
if (r<ulsch_harq->Cminus)
Kr = ulsch_harq->Kminus;
else
Kr = ulsch_harq->Kplus;
sumKr += Kr;
}
AssertFatal(sumKr>0,
"[eNB] ulsch_decoding.c: FATAL sumKr is 0! (Nid_cell %d, rnti %x, x2 %x): harq_pid %d round %d, RV %d, O_RI %d, O_ACK %d, G %d, subframe %d\n",
frame_parms->Nid_cell,ulsch->rnti,x2,
harq_pid,
ulsch_harq->round,
ulsch_harq->rvidx,
ulsch_harq->O_RI,
ulsch_harq->O_ACK,
G,
subframe);
// Compute Q_ri
Qprime = ulsch_harq->O_RI*ulsch_harq->Msc_initial*ulsch_harq->Nsymb_initial * ulsch->beta_offset_ri_times8;
if (Qprime > 0 ) {
if ((Qprime % (8*sumKr)) > 0)
Qprime = 1+(Qprime/(8*sumKr));
else
Qprime = Qprime/(8*sumKr);
if (Qprime > 4*nb_rb * 12)
Qprime = 4*nb_rb * 12;
}
Q_RI = Q_m*Qprime;
Qprime_RI = Qprime;
// Compute Q_ack
Qprime = ulsch_harq->O_ACK*ulsch_harq->Msc_initial*ulsch_harq->Nsymb_initial * ulsch->beta_offset_harqack_times8;
if (Qprime > 0) {
if ((Qprime % (8*sumKr)) > 0)
Qprime = 1+(Qprime/(8*sumKr));
else
Qprime = Qprime/(8*sumKr);
if (Qprime > (4*nb_rb * 12))
Qprime = 4*nb_rb * 12;
}
// Q_ACK = Qprime * Q_m;
Qprime_ACK = Qprime;
#ifdef DEBUG_ULSCH_DECODING
printf("ulsch_decoding.c: Qprime_ACK %d, Msc_initial %d, Nsymb_initial %d, sumKr %d\n",
Qprime_ACK,ulsch_harq->Msc_initial,ulsch_harq->Nsymb_initial,sumKr);
#endif
// Compute Q_cqi
if (ulsch_harq->Or1 < 12)
L=0;
else
L=8;
// NOTE: we have to handle the case where we have a very small number of bits (condition on pg. 26 36.212)
if (ulsch_harq->Or1 > 0)
Qprime = (ulsch_harq->Or1 + L) * ulsch_harq->Msc_initial*ulsch_harq->Nsymb_initial * ulsch->beta_offset_cqi_times8;
else
Qprime=0;
if (Qprime > 0) { // check if ceiling is larger than floor in Q' expression
if ((Qprime % (8*sumKr)) > 0)
Qprime = 1+(Qprime/(8*sumKr));
else
Qprime = Qprime/(8*sumKr);
}
G = nb_rb * (12 * Q_m) * (ulsch_harq->Nsymb_pusch);
Q_CQI = Q_m * Qprime;
#ifdef DEBUG_ULSCH_DECODING
printf("ulsch_decoding: G %d, Q_RI %d, Q_CQI %d (L %d, Or1 %d) O_ACK %d\n",G,Q_RI,Q_CQI,L,ulsch_harq->Or1,ulsch_harq->O_ACK);
#endif
G = G - Q_RI - Q_CQI;
ulsch_harq->G = G;
AssertFatal((int)G > 0,
"FATAL: ulsch_decoding.c G < 0 (%d) : Q_RI %d, Q_CQI %d\n",G,Q_RI,Q_CQI);
H = G + Q_CQI;
Hprime = H/Q_m;
// Demultiplexing/Deinterleaving of PUSCH/ACK/RI/CQI
start_meas(&eNB->ulsch_demultiplexing_stats);
Hpp = Hprime + Qprime_RI;
Cmux = ulsch_harq->Nsymb_pusch;
Rmux_prime = Hpp/Cmux;
// Clear "tag" interleaving matrix to allow for CQI/DATA identification
memset(ytag,0,Cmux*Rmux_prime);
i=0;
memset(y,LTE_NULL,Q_m*Hpp);
// read in buffer and unscramble llrs for everything but placeholder bits
// llrs stored per symbol correspond to columns of interleaving matrix
s = lte_gold_unscram(&x1, &x2, 1);
i2=0;
for (i=0; i<((Hpp*Q_m)>>5); i++) {
/*
for (j=0; j<32; j++) {
cseq[i2++] = (int16_t)((((s>>j)&1)<<1)-1);
}
*/
#if defined(__x86_64__) || defined(__i386__)
#ifndef __AVX2__
((__m128i*)cseq)[i2++] = ((__m128i*)unscrambling_lut)[(s&65535)<<1];
((__m128i*)cseq)[i2++] = ((__m128i*)unscrambling_lut)[1+((s&65535)<<1)];
s>>=16;
((__m128i*)cseq)[i2++] = ((__m128i*)unscrambling_lut)[(s&65535)<<1];
((__m128i*)cseq)[i2++] = ((__m128i*)unscrambling_lut)[1+((s&65535)<<1)];
#else
((__m256i*)cseq)[i2++] = ((__m256i*)unscrambling_lut)[s&65535];
((__m256i*)cseq)[i2++] = ((__m256i*)unscrambling_lut)[(s>>16)&65535];
#endif
#elif defined(__arm__)
((int16x8_t*)cseq)[i2++] = ((int16x8_t*)unscrambling_lut)[(s&65535)<<1];
((int16x8_t*)cseq)[i2++] = ((int16x8_t*)unscrambling_lut)[1+((s&65535)<<1)];
s>>=16;
((int16x8_t*)cseq)[i2++] = ((int16x8_t*)unscrambling_lut)[(s&65535)<<1];
((int16x8_t*)cseq)[i2++] = ((int16x8_t*)unscrambling_lut)[1+((s&65535)<<1)];
#endif
s = lte_gold_unscram(&x1, &x2, 0);
}
// printf("after unscrambling c[%d] = %p\n",0,ulsch_harq->c[0]);
if (frame_parms->Ncp == 0)
columnset = cs_ri_normal;
else
columnset = cs_ri_extended;
j=0;
for (i=0; i<Qprime_RI; i++) {
r = Rmux_prime - 1 - (i>>2);
/*
for (q=0;q<Q_m;q++)
ytag2[q+(Q_m*((r*Cmux) + columnset[j]))] = q_RI[(q+(Q_m*i))%len_RI];
*/
off =((Rmux_prime*Q_m*columnset[j])+(r*Q_m));
cseq[off+1] = cseq[off]; // PUSCH_y
for (q=2; q<Q_m; q++)
cseq[off+q] = -1; // PUSCH_x
j=(j+3)&3;
}
// printf("after RI c[%d] = %p\n",0,ulsch_harq->c[0]);
// HARQ-ACK Bits (Note these overwrite some bits)
if (frame_parms->Ncp == 0)
columnset = cs_ack_normal;
else
columnset = cs_ack_extended;
j=0;
for (i=0; i<Qprime_ACK; i++) {
r = Rmux_prime - 1 - (i>>2);
off =((Rmux_prime*Q_m*columnset[j])+(r*Q_m));
if (ulsch_harq->O_ACK == 1) {
if (ulsch->bundling==0)
cseq[off+1] = cseq[off]; // PUSCH_y
for (q=2; q<Q_m; q++)
cseq[off+q] = -1; // PUSCH_x
} else if (ulsch_harq->O_ACK == 2) {
for (q=2; q<Q_m; q++)
cseq[off+q] = -1; // PUSCH_x
}
#ifdef DEBUG_ULSCH_DECODING
printf("ulsch_decoding.c: ACK i %d, r %d, j %d, ColumnSet[j] %d\n",i,r,j,columnset[j]);
#endif
j=(j+3)&3;
}
i=0;
switch (Q_m) {
case 2:
for (j=0; j<Cmux; j++) {
i2=j<<1;
for (r=0; r<Rmux_prime; r++) {
c = cseq[i];
// printf("ulsch %d: %d * ",i,c);
y[i2++] = c*ulsch_llr[i++];
// printf("%d\n",ulsch_llr[i-1]);
c = cseq[i];
// printf("ulsch %d: %d * ",i,c);
y[i2] = c*ulsch_llr[i++];
// printf("%d\n",ulsch_llr[i-1]);
i2=(i2+(Cmux<<1)-1);
}
}
break;
case 4:
for (j=0; j<Cmux; j++) {
i2=j<<2;
for (r=0; r<Rmux_prime; r++) {
/*
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2] = c*ulsch_llr[i++];
i2=(i2+(Cmux<<2)-3);
*/
// slightly more optimized version (equivalent to above) for 16QAM to improve computational performance
*(__m64 *)&y[i2] = _mm_sign_pi16(*(__m64*)&ulsch_llr[i],*(__m64*)&cseq[i]);i+=4;i2+=(Cmux<<2);
}
}
break;
case 6:
for (j=0; j<Cmux; j++) {
i2=j*6;
for (r=0; r<Rmux_prime; r++) {
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2++] = c*ulsch_llr[i++];
c = cseq[i];
y[i2] = c*ulsch_llr[i++];
i2=(i2+(Cmux*6)-5);
}
}
break;
}
if (i!=(H+Q_RI))
LOG_D(PHY,"ulsch_decoding.c: Error in input buffer length (j %d, H+Q_RI %d)\n",i,H+Q_RI);
// HARQ-ACK Bits (LLRs are nulled in overwritten bits after copying HARQ-ACK LLR)
if (frame_parms->Ncp == 0)
columnset = cs_ack_normal;
else
columnset = cs_ack_extended;
j=0;
if (ulsch_harq->O_ACK == 1) {
switch (Q_m) {
case 2:
len_ACK = 2;
break;
case 4:
len_ACK = 4;
break;
case 6:
len_ACK = 6;
break;
}
}
if (ulsch_harq->O_ACK == 2) {
switch (Q_m) {
case 2:
len_ACK = 6;
break;
case 4:
len_ACK = 12;
break;
case 6:
len_ACK = 18;
break;
}
}
if (ulsch_harq->O_ACK > 2) {
LOG_E(PHY,"ulsch_decoding: FATAL, ACK cannot be more than 2 bits yet O_ACK:%d SFN/SF:%04d%d UE_id:%d rnti:%x\n",ulsch_harq->O_ACK,proc->frame_rx,proc->subframe_rx,UE_id,ulsch->rnti);
return(-1);
}
for (i=0; i<len_ACK; i++)
ulsch_harq->q_ACK[i] = 0;
for (i=0; i<Qprime_ACK; i++) {
r = Rmux_prime -1 - (i>>2);
for (q=0; q<Q_m; q++) {
if (y[q+(Q_m*((r*Cmux) + columnset[j]))]!=0)
ulsch_harq->q_ACK[(q+(Q_m*i))%len_ACK] += y[q+(Q_m*((r*Cmux) + columnset[j]))];
y[q+(Q_m*((r*Cmux) + columnset[j]))]=0; // NULL LLRs in ACK positions
}
j=(j+3)&3;
}
// printf("after ACKNAK c[%d] = %p\n",0,ulsch_harq->c[0]);
// RI BITS
if (ulsch_harq->O_RI == 1) {
switch (Q_m) {
case 2:
len_RI=2;
break;
case 4:
len_RI=4;
break;
case 6:
len_RI=6;
break;
}
}
if (ulsch_harq->O_RI > 1) {
LOG_E(PHY,"ulsch_decoding: FATAL, RI cannot be more than 1 bit yet\n");
return(-1);
}
for (i=0; i<len_RI; i++)
ulsch_harq->q_RI[i] = 0;
if (frame_parms->Ncp == 0)
columnset = cs_ri_normal;
else
columnset = cs_ri_extended;
j=0;
for (i=0; i<Qprime_RI; i++) {
r = Rmux_prime -1 - (i>>2);
for (q=0; q<Q_m; q++)
ulsch_harq->q_RI[(q+(Q_m*i))%len_RI] += y[q+(Q_m*((r*Cmux) + columnset[j]))];
ytag[(r*Cmux) + columnset[j]] = LTE_NULL;
j=(j+3)&3;
}
// printf("after RI2 c[%d] = %p\n",0,ulsch_harq->c[0]);
// CQI and Data bits
j=0;
j2=0;
// r=0;
if (Q_RI>0) {
for (i=0; i<(Q_CQI/Q_m); i++) {
while (ytag[j]==LTE_NULL) {
j++;
j2+=Q_m;
}
for (q=0; q<Q_m; q++) {
// ys = y[q+(Q_m*((r*Cmux)+j))];
ys = y[q+j2];
if (ys>127)
ulsch_harq->q[q+(Q_m*i)] = 127;
else if (ys<-128)
ulsch_harq->q[q+(Q_m*i)] = -128;
else
ulsch_harq->q[q+(Q_m*i)] = ys;
}
j2+=Q_m;
}
switch (Q_m) {
case 2:
for (iprime=0; iprime<G;) {
while (ytag[j]==LTE_NULL) {
j++;
j2+=2;
}
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
}
break;
case 4:
for (iprime=0; iprime<G;) {
while (ytag[j]==LTE_NULL) {
j++;
j2+=4;
}
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
}
break;
case 6:
for (iprime=0; iprime<G;) {
while (ytag[j]==LTE_NULL) {
j++;
j2+=6;
}
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
ulsch_harq->e[iprime++] = y[j2++];
}
break;
}
} // Q_RI>0
else {
for (i=0; i<(Q_CQI/Q_m); i++) {
for (q=0; q<Q_m; q++) {
ys = y[q+j2];
if (ys>127)
ulsch_harq->q[q+(Q_m*i)] = 127;
else if (ys<-128)
ulsch_harq->q[q+(Q_m*i)] = -128;
else
ulsch_harq->q[q+(Q_m*i)] = ys;
}
j2+=Q_m;
}
/* To be improved according to alignment of j2
#if defined(__x86_64__)||defined(__i386__)
#ifndef __AVX2__
for (iprime=0; iprime<G;iprime+=8,j2+=8)
*((__m128i *)&ulsch_harq->e[iprime]) = *((__m128i *)&y[j2]);
#else
for (iprime=0; iprime<G;iprime+=16,j2+=16)
*((__m256i *)&ulsch_harq->e[iprime]) = *((__m256i *)&y[j2]);
#endif
#elif defined(__arm__)
for (iprime=0; iprime<G;iprime+=8,j2+=8)
*((int16x8_t *)&ulsch_harq->e[iprime]) = *((int16x8_t *)&y[j2]);
#endif
*/
int16_t *yp,*ep;
for (iprime=0,yp=&y[j2],ep=&ulsch_harq->e[0];
iprime<G;
iprime+=8,j2+=8,ep+=8,yp+=8) {
ep[0] = yp[0];
ep[1] = yp[1];
ep[2] = yp[2];
ep[3] = yp[3];
ep[4] = yp[4];
ep[5] = yp[5];
ep[6] = yp[6];
ep[7] = yp[7];
}
}
stop_meas(&eNB->ulsch_demultiplexing_stats);
// printf("after ACKNAK2 c[%d] = %p (iprime %d, G %d)\n",0,ulsch_harq->c[0],iprime,G);
// Do CQI/RI/HARQ-ACK Decoding first and pass to MAC
// HARQ-ACK
wACK_idx = (ulsch->bundling==0) ? 4 : ((Nbundled-1)&3);
if (ulsch_harq->O_ACK == 1) {
ulsch_harq->q_ACK[0] *= wACK_RX[wACK_idx][0];
ulsch_harq->q_ACK[0] += (ulsch->bundling==0) ? ulsch_harq->q_ACK[1]*wACK_RX[wACK_idx][0] : ulsch_harq->q_ACK[1]*wACK_RX[wACK_idx][1];
if (ulsch_harq->q_ACK[0] < 0)
ulsch_harq->o_ACK[0] = 0;
else
ulsch_harq->o_ACK[0] = 1;
}
if (ulsch_harq->O_ACK == 2) {
switch (Q_m) {
case 2:
ulsch_harq->q_ACK[0] = ulsch_harq->q_ACK[0]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[3]*wACK_RX[wACK_idx][1];
ulsch_harq->q_ACK[1] = ulsch_harq->q_ACK[1]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[4]*wACK_RX[wACK_idx][1];
ulsch_harq->q_ACK[2] = ulsch_harq->q_ACK[2]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[5]*wACK_RX[wACK_idx][1];
break;
case 4:
ulsch_harq->q_ACK[0] = ulsch_harq->q_ACK[0]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[5]*wACK_RX[wACK_idx][1];
ulsch_harq->q_ACK[1] = ulsch_harq->q_ACK[1]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[8]*wACK_RX[wACK_idx][1];
ulsch_harq->q_ACK[2] = ulsch_harq->q_ACK[4]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[9]*wACK_RX[wACK_idx][1];
break;
case 6:
ulsch_harq->q_ACK[0] = ulsch_harq->q_ACK[0]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[7]*wACK_RX[wACK_idx][1];
ulsch_harq->q_ACK[1] = ulsch_harq->q_ACK[1]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[12]*wACK_RX[wACK_idx][1];
ulsch_harq->q_ACK[2] = ulsch_harq->q_ACK[6]*wACK_RX[wACK_idx][0] + ulsch_harq->q_ACK[13]*wACK_RX[wACK_idx][1];
break;
}
ulsch_harq->o_ACK[0] = 1;
ulsch_harq->o_ACK[1] = 1;
metric = ulsch_harq->q_ACK[0]+ulsch_harq->q_ACK[1]-ulsch_harq->q_ACK[2];
metric_new = -ulsch_harq->q_ACK[0]+ulsch_harq->q_ACK[1]+ulsch_harq->q_ACK[2];
if (metric_new > metric) {
ulsch_harq->o_ACK[0]=0;
ulsch_harq->o_ACK[1]=1;
metric = metric_new;
}
metric_new = ulsch_harq->q_ACK[0]-ulsch_harq->q_ACK[1]+ulsch_harq->q_ACK[2];
if (metric_new > metric) {
ulsch_harq->o_ACK[0] = 1;
ulsch_harq->o_ACK[1] = 0;
metric = metric_new;
}
metric_new = -ulsch_harq->q_ACK[0]-ulsch_harq->q_ACK[1]-ulsch_harq->q_ACK[2];
if (metric_new > metric) {
ulsch_harq->o_ACK[0] = 0;
ulsch_harq->o_ACK[1] = 0;
metric = metric_new;
}
}
// RI
// rank 1
if ((ulsch_harq->O_RI == 1) && (Qprime_RI > 0)) {
ulsch_harq->o_RI[0] = ((ulsch_harq->q_RI[0] + ulsch_harq->q_RI[Q_m/2]) > 0) ? 0 : 1;
}
// CQI
// printf("before cqi c[%d] = %p\n",0,ulsch_harq->c[0]);
ulsch_harq->cqi_crc_status = 0;
if (Q_CQI>0) {
memset((void *)&dummy_w_cc[0],0,3*(ulsch_harq->Or1+8+32));
O_RCC = generate_dummy_w_cc(ulsch_harq->Or1+8,
&dummy_w_cc[0]);
lte_rate_matching_cc_rx(O_RCC,
Q_CQI,
ulsch_harq->o_w,
dummy_w_cc,
ulsch_harq->q);
sub_block_deinterleaving_cc((unsigned int)(ulsch_harq->Or1+8),
&ulsch_harq->o_d[96],
&ulsch_harq->o_w[0]);
memset(ulsch_harq->o,0,(7+8+ulsch_harq->Or1) / 8);
phy_viterbi_lte_sse2(ulsch_harq->o_d+96,ulsch_harq->o,8+ulsch_harq->Or1);
if (extract_cqi_crc(ulsch_harq->o,ulsch_harq->Or1) == (crc8(ulsch_harq->o,ulsch_harq->Or1)>>24))
ulsch_harq->cqi_crc_status = 1;
#ifdef DEBUG_ULSCH_DECODING
printf("ulsch_decoding: Or1=%d\n",ulsch_harq->Or1);
for (i=0; i<1+((8+ulsch_harq->Or1)/8); i++)
printf("ulsch_decoding: O[%d] %d\n",i,ulsch_harq->o[i]);
if (ulsch_harq->cqi_crc_status == 1)
printf("RX CQI CRC OK (%x)\n",extract_cqi_crc(ulsch_harq->o,ulsch_harq->Or1));
else
printf("RX CQI CRC NOT OK (%x)\n",extract_cqi_crc(ulsch_harq->o,ulsch_harq->Or1));
#endif
}
LOG_D(PHY,"frame %d subframe %d O_ACK:%d o_ACK[]=%d:%d:%d:%d\n",frame,subframe,ulsch_harq->O_ACK,ulsch_harq->o_ACK[0],ulsch_harq->o_ACK[1],ulsch_harq->o_ACK[2],ulsch_harq->o_ACK[3]);
// Do ULSCH Decoding for data portion
ret = eNB->td(eNB,UE_id,harq_pid,llr8_flag);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_ULSCH_DECODING0+harq_pid,0);
return(ret);
}