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More NR-PUSCH UCI bit multiplexing

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master
Xavier Arteaga 4 years ago committed by Xavier Arteaga
parent 289fff9c22
commit 2b9bd1173e
3 changed files with 129 additions and 73 deletions
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1
lib/include/srslte/phy/phch/pusch_nr.h
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@ -59,6 +59,7 @@ typedef struct SRSLTE_API {
uint32_t* pos_ack; ///< Reserved resource elements for HARQ-ACK multiplexing position
uint32_t* pos_csi1; ///< Reserved resource elements for CSI part 1 multiplexing position
uint32_t* pos_csi2; ///< Reserved resource elements for CSI part 1 multiplexing position
bool uci_mux; ///< Set to true if PUSCH needs to multiplex UCI
uint32_t G_ack; ///< Number of encoded HARQ-ACK bits
uint32_t G_csi1; ///< Number of encoded CSI part 1 bits
uint32_t G_csi2; ///< Number of encoded CSI part 2 bits

82
lib/src/phy/phch/pusch_nr.c
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@ -471,6 +471,11 @@ pusch_nr_cinit(const srslte_carrier_nr_t* carrier, const srslte_sch_cfg_nr_t* cf
static inline int pusch_nr_fill_uci_cfg(srslte_pusch_nr_t* q, const srslte_sch_cfg_nr_t* cfg)
{
if (cfg->grant.nof_prb == 0) {
ERROR("Invalid number of PRB (%d)", cfg->grant.nof_prb);
return SRSLTE_ERROR;
}
// Initially, copy all fields
q->uci_cfg = cfg->uci;
@ -582,6 +587,15 @@ static inline int pusch_nr_fill_uci_cfg(srslte_pusch_nr_t* q, const srslte_sch_c
// Implements TS 38.212 6.2.7 Data and control multiplexing (for NR-PUSCH)
static int pusch_nr_gen_mux_uci(srslte_pusch_nr_t* q, const srslte_uci_cfg_nr_t* cfg)
{
// Decide whether UCI shall be multiplexed
q->uci_mux = (q->G_ack > 0 || q->G_csi1 > 0 || q->G_csi2 > 0);
// Check if UCI multiplexing is NOT required
if (!q->uci_mux) {
q->G_ulsch = 0;
return SRSLTE_SUCCESS;
}
// Bit positions
uint32_t* pos_ulsch = q->pos_ulsch; // coded bits for UL-SCH
uint32_t* pos_ack = q->pos_ack; // coded bits for HARQ-ACK
@ -602,10 +616,14 @@ static int pusch_nr_gen_mux_uci(srslte_pusch_nr_t* q, const srslte_uci_cfg_nr_t*
uint32_t Nl = cfg->pusch.nof_layers;
uint32_t Qm = srslte_mod_bits_x_symbol(cfg->pusch.modulation);
// If 2 or less HARQ-ACK bits, use reserve
// if the number of HARQ-ACK information bits to be transmitted on PUSCH is 0, 1 or 2 bits
uint32_t G_ack_rvd = 0;
if (cfg->o_ack <= 2) {
G_ack_rvd = G_ack;
// the number of reserved resource elements for potential HARQ-ACK transmission is calculated according to Clause
// 6.3.2.4.2.1, by setting O_ACK = 2 ;
G_ack_rvd = srslte_uci_nr_pusch_ack_nof_bits(&q->uci_cfg.pusch, 2);
// Disable non reserved HARQ-ACK bits
G_ack = 0;
}
@ -704,7 +722,7 @@ static int pusch_nr_gen_mux_uci(srslte_pusch_nr_t* q, const srslte_uci_cfg_nr_t*
}
csi1_m_re_count--;
csi1_i++;
} else if (csi2_m_re_count != 0 && csi2_i % csi2_d == 0 && m_csi2_count < G_csi2) {
} else if (!reserved && csi2_m_re_count != 0 && csi2_i % csi2_d == 0 && m_csi2_count < G_csi2) {
for (uint32_t j = 0; j < Nl * Qm; j++) {
pos_csi2[m_csi2_count++] = m_all_count + j;
}
@ -716,15 +734,21 @@ static int pusch_nr_gen_mux_uci(srslte_pusch_nr_t* q, const srslte_uci_cfg_nr_t*
pos_ulsch[m_ulsch_count++] = m_all_count + j;
}
ulsch_m_re_count--;
if (!reserved) {
csi1_i++;
csi2_i++;
}
}
// Set reserved bits
// Set reserved bits only if there are ACK bits
if (reserved) {
if (cfg->o_ack > 0) {
for (uint32_t j = 0; j < Nl * Qm; j++) {
pos_ack[m_ack_count++] = m_all_count + j;
}
} else {
m_ack_count += Nl * Qm;
}
ack_m_re_count--;
}
@ -751,12 +775,13 @@ static int pusch_nr_gen_mux_uci(srslte_pusch_nr_t* q, const srslte_uci_cfg_nr_t*
q->G_ulsch = m_ulsch_count;
// Assert Number of bits
if (G_ack_rvd != 0 && G_ack_rvd != m_ack_count) {
if (G_ack_rvd != 0 && G_ack_rvd != m_ack_count && cfg->o_ack > 0) {
ERROR("Not matched %d!=%d", G_ack_rvd, m_ack_count);
}
if (G_ack != 0 && G_ack != m_ack_count) {
ERROR("Not matched %d!=%d", G_ack, m_ack_count);
}
q->G_csi1 = m_csi1_count;
if (G_csi1 != 0 && G_csi1 != m_csi1_count) {
ERROR("Not matched %d!=%d", G_csi1, m_csi1_count);
}
@ -770,7 +795,7 @@ static int pusch_nr_gen_mux_uci(srslte_pusch_nr_t* q, const srslte_uci_cfg_nr_t*
DEBUG("UL-SCH bit positions:");
srslte_vec_fprint_i(stdout, (int*)pos_ulsch, m_ulsch_count);
}
if (m_ack_count != 0) {
if (m_ack_count != 0 && cfg->o_ack > 0) {
DEBUG("HARQ-ACK bit positions [%d]:", m_ack_count);
srslte_vec_fprint_i(stdout, (int*)pos_ack, m_ack_count);
}
@ -843,34 +868,41 @@ static inline int pusch_nr_encode_codeword(srslte_pusch_nr_t* q,
return SRSLTE_ERROR;
}
// Multiplex UL-SCH with UCI only if it is necessary
uint8_t* b = q->g_ulsch;
if (q->uci_mux) {
// Change b location
b = q->b[tb->cw_idx];
// Multiplex UL-SCH
for (uint32_t i = 0; i < q->G_ulsch; i++) {
q->b[tb->cw_idx][q->pos_ulsch[i]] = q->g_ulsch[i];
b[q->pos_ulsch[i]] = q->g_ulsch[i];
}
// Multiplex CSI part 1
for (uint32_t i = 0; i < q->G_csi1; i++) {
q->b[tb->cw_idx][q->pos_csi1[i]] = q->g_csi1[i];
b[q->pos_csi1[i]] = q->g_csi1[i];
}
// Multiplex CSI part 2
for (uint32_t i = 0; i < q->G_csi2; i++) {
q->b[tb->cw_idx][q->pos_csi2[i]] = q->g_csi2[i];
b[q->pos_csi2[i]] = q->g_csi2[i];
}
// Multiplex HARQ-ACK
for (uint32_t i = 0; i < q->G_ack; i++) {
q->b[tb->cw_idx][q->pos_ack[i]] = q->g_ack[i];
b[q->pos_ack[i]] = q->g_ack[i];
}
}
if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_DEBUG && !handler_registered) {
DEBUG("b=");
srslte_vec_fprint_b(stdout, q->b[tb->cw_idx], tb->nof_bits);
srslte_vec_fprint_b(stdout, b, tb->nof_bits);
}
// 7.3.1.1 Scrambling
uint32_t cinit = pusch_nr_cinit(&q->carrier, cfg, rnti, tb->cw_idx);
srslte_sequence_apply_bit(q->b[tb->cw_idx], q->b[tb->cw_idx], tb->nof_bits, cinit);
srslte_sequence_apply_bit(b, q->b[tb->cw_idx], tb->nof_bits, cinit);
// Special Scrambling condition
if (q->uci_cfg.o_ack <= 2) {
@ -1044,6 +1076,8 @@ static inline int pusch_nr_decode_codeword(srslte_pusch_nr_t* q,
srslte_vec_fprint_bs(stdout, llr, tb->nof_bits);
}
// Demultiplex UCI only if necessary
if (q->uci_mux) {
// Demultiplex UL-SCH, change sign
int8_t* g_ulsch = (int8_t*)q->g_ulsch;
for (uint32_t i = 0; i < q->G_ulsch; i++) {
@ -1071,14 +1105,6 @@ static inline int pusch_nr_decode_codeword(srslte_pusch_nr_t* q,
g_csi2[i] = llr[q->pos_csi2[i]];
}
// Decode Ul-SCH
if (q->G_ulsch != 0) {
if (srslte_ulsch_nr_decode(&q->sch, &cfg->sch_cfg, tb, g_ulsch, res->payload, &res->crc) < SRSLTE_SUCCESS) {
ERROR("Error in SCH decoding");
return SRSLTE_ERROR;
}
}
// Decode HARQ-ACK
if (q->G_ack) {
if (srslte_uci_nr_decode_pusch_ack(&q->uci, &q->uci_cfg, g_ack, &res->uci)) {
@ -1098,6 +1124,22 @@ static inline int pusch_nr_decode_codeword(srslte_pusch_nr_t* q,
// Decode CSI part 2
// ... Not implemented
// Change LLR pointer
llr = g_ulsch;
} else {
for (uint32_t i = 0; i < tb->nof_bits; i++) {
llr[i] *= -1;
}
}
// Decode Ul-SCH
if (q->G_ulsch != 0) {
if (srslte_ulsch_nr_decode(&q->sch, &cfg->sch_cfg, tb, llr, res->payload, &res->crc) < SRSLTE_SUCCESS) {
ERROR("Error in SCH decoding");
return SRSLTE_ERROR;
}
}
return SRSLTE_SUCCESS;
}

21
lib/src/phy/phch/uci_nr.c
Unescape Escape View File

@ -451,7 +451,7 @@ static int uci_nr_encode_2bit(srslte_uci_nr_t* q, const srslte_uci_cfg_nr_t* cfg
}
if (SRSLTE_DEBUG_ENABLED && srslte_verbose >= SRSLTE_VERBOSE_INFO && !handler_registered) {
UCI_NR_INFO_TX("Two bit encoded NR-UCI; o=");
UCI_NR_INFO_TX("Two bit encoded NR-UCI; E=%d; o=", E);
srslte_vec_fprint_b(stdout, o, E);
}
@ -982,6 +982,11 @@ int srslte_uci_nr_pusch_ack_nof_bits(const srslte_uci_nr_pusch_cfg_t* cfg, uint3
return SRSLTE_ERROR_INVALID_INPUTS;
}
if (cfg->nof_layers == 0) {
ERROR("Invalid number of layers (%d)", cfg->nof_layers);
return SRSLTE_ERROR;
}
int Q_ack_prime = uci_nr_pusch_Q_prime_ack(cfg, O_ack);
if (Q_ack_prime < SRSLTE_SUCCESS) {
ERROR("Error calculating number of RE");
@ -1006,10 +1011,13 @@ int srslte_uci_nr_encode_pusch_ack(srslte_uci_nr_t* q,
// 6.3.2.1 UCI bit sequence generation
// 6.3.2.1.1 HARQ-ACK
bool has_csi_part2 = srslte_csi_has_part2(cfg->csi, cfg->nof_csi);
if (cfg->pusch.K_sum == 0 && cfg->nof_csi > 1 && !has_csi_part2 && cfg->o_ack < 2) {
A = 2;
q->bit_sequence[0] = (cfg->o_ack == 0) ? 0 : value->ack[0];
if (cfg->pusch.K_sum == 0 && cfg->nof_csi > 1 && !has_csi_part2 && A < 2) {
q->bit_sequence[0] = (A == 0) ? 0 : value->ack[0];
q->bit_sequence[1] = 0;
A = 2;
} else if (A == 0) {
UCI_NR_INFO_TX("No HARQ-ACK to mux");
return SRSLTE_SUCCESS;
} else {
srslte_vec_u8_copy(q->bit_sequence, value->ack, cfg->o_ack);
}
@ -1142,6 +1150,11 @@ int srslte_uci_nr_encode_pusch_csi1(srslte_uci_nr_t* q,
return SRSLTE_ERROR;
}
if (A == 0) {
UCI_NR_INFO_TX("No CSI part 1 to mux");
return SRSLTE_SUCCESS;
}
// Compute total of encoded bits according to 6.3.2.4 Rate matching
int E_uci = srslte_uci_nr_pusch_csi1_nof_bits(cfg);
if (E_uci < SRSLTE_SUCCESS) {

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