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srsLTE
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Refactored cases mcs>29 for ul/dl

This commit is contained in:
Ismael Gomez 2017-10-19 16:10:27 -04:00
parent 399f1cdbd1
commit 2f44e2bf3a
10 changed files with 123 additions and 129 deletions
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3
lib/include/srslte/phy/common/phy_common.h
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@ -197,7 +197,8 @@ typedef enum SRSLTE_API {
SRSLTE_MOD_BPSK = 0,
SRSLTE_MOD_QPSK,
SRSLTE_MOD_16QAM,
SRSLTE_MOD_64QAM
SRSLTE_MOD_64QAM,
SRSLTE_MOD_LAST
} srslte_mod_t;
typedef struct SRSLTE_API {

3
lib/include/srslte/phy/phch/ra.h
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@ -226,8 +226,7 @@ SRSLTE_API uint32_t srslte_ra_dl_grant_nof_re(srslte_ra_dl_grant_t *grant,
SRSLTE_API int srslte_ra_ul_dci_to_grant(srslte_ra_ul_dci_t *dci,
uint32_t nof_prb,
uint32_t n_rb_ho,
srslte_ra_ul_grant_t *grant,
uint32_t harq_pid);
srslte_ra_ul_grant_t *grant);
SRSLTE_API void srslte_ra_ul_grant_to_nbits(srslte_ra_ul_grant_t *grant,
srslte_cp_t cp,

1
lib/src/phy/modem/demod_hard.c
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@ -44,6 +44,7 @@ int srslte_demod_hard_demodulate(srslte_demod_hard_t* q, cf_t* symbols, uint8_t
int nbits=-1;
switch(q->mod) {
case SRSLTE_MOD_LAST:
case SRSLTE_MOD_BPSK:
hard_bpsk_demod(symbols,bits,nsymbols);
nbits=nsymbols;

1
lib/src/phy/modem/modem_table.c
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@ -82,6 +82,7 @@ int srslte_modem_table_set(srslte_modem_table_t* q, cf_t* table, uint32_t nsymbo
int srslte_modem_table_lte(srslte_modem_table_t* q, srslte_mod_t modulation) {
srslte_modem_table_init(q);
switch(modulation) {
case SRSLTE_MOD_LAST:
case SRSLTE_MOD_BPSK:
q->nbits_x_symbol = 1;
q->nsymbols = 2;

4
lib/src/phy/phch/dci.c
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@ -111,7 +111,7 @@ int srslte_dci_rar_to_ul_grant(srslte_dci_rar_grant_t *rar, uint32_t nof_prb,
srslte_ra_type2_from_riv(riv, &ul_dci->type2_alloc.L_crb, &ul_dci->type2_alloc.RB_start,
nof_prb, nof_prb);
if (srslte_ra_ul_dci_to_grant(ul_dci, nof_prb, n_rb_ho, grant, 0)) {
if (srslte_ra_ul_dci_to_grant(ul_dci, nof_prb, n_rb_ho, grant)) {
return SRSLTE_ERROR;
}
@ -177,7 +177,7 @@ int srslte_dci_msg_to_ul_grant(srslte_dci_msg_t *msg, uint32_t nof_prb,
return ret;
}
if (srslte_ra_ul_dci_to_grant(ul_dci, nof_prb, n_rb_ho, grant, harq_pid)) {
if (srslte_ra_ul_dci_to_grant(ul_dci, nof_prb, n_rb_ho, grant)) {
return ret;
}

78
lib/src/phy/phch/ra.c
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@ -185,51 +185,34 @@ int srslte_ra_ul_dci_to_grant_prb_allocation(srslte_ra_ul_dci_t *dci, srslte_ra_
}
}
srslte_mod_t last_mod[8];
uint32_t last_ul_tbs_idx[8];
uint32_t last_dl_tbs[8];
uint32_t last_dl_tbs2[8];
static int ul_dci_to_grant_mcs(srslte_ra_ul_dci_t *dci, srslte_ra_ul_grant_t *grant, uint32_t harq_pid) {
int tbs = -1;
static void ul_dci_to_grant_mcs(srslte_ra_ul_dci_t *dci, srslte_ra_ul_grant_t *grant) {
// 8.6.2 First paragraph
if (dci->mcs_idx <= 28) {
/* Table 8.6.1-1 on 36.213 */
if (dci->mcs_idx < 11) {
grant->mcs.mod = SRSLTE_MOD_QPSK;
tbs = srslte_ra_tbs_from_idx(dci->mcs_idx, grant->L_prb);
last_ul_tbs_idx[harq_pid%8] = dci->mcs_idx;
grant->mcs.tbs = srslte_ra_tbs_from_idx(dci->mcs_idx, grant->L_prb);
} else if (dci->mcs_idx < 21) {
grant->mcs.mod = SRSLTE_MOD_16QAM;
tbs = srslte_ra_tbs_from_idx(dci->mcs_idx-1, grant->L_prb);
last_ul_tbs_idx[harq_pid%8] = dci->mcs_idx-1;
grant->mcs.tbs = srslte_ra_tbs_from_idx(dci->mcs_idx-1, grant->L_prb);
} else if (dci->mcs_idx < 29) {
grant->mcs.mod = SRSLTE_MOD_64QAM;
tbs = srslte_ra_tbs_from_idx(dci->mcs_idx-2, grant->L_prb);
last_ul_tbs_idx[harq_pid%8] = dci->mcs_idx-2;
grant->mcs.tbs = srslte_ra_tbs_from_idx(dci->mcs_idx-2, grant->L_prb);
} else {
fprintf(stderr, "Invalid MCS index %d\n", dci->mcs_idx);
}
last_mod[harq_pid%8] = grant->mcs.mod;
} else if (dci->mcs_idx == 29 && dci->cqi_request && grant->L_prb <= 4) {
// 8.6.1 and 8.6.2 36.213 second paragraph
grant->mcs.mod = SRSLTE_MOD_QPSK;
tbs = srslte_ra_tbs_from_idx(last_ul_tbs_idx[harq_pid%8], grant->L_prb);
grant->mcs.tbs = 0;
dci->rv_idx = 1;
} else if (dci->mcs_idx >= 29) {
// Else use last TBS/Modulation and use mcs to obtain rv_idx
tbs = srslte_ra_tbs_from_idx(last_ul_tbs_idx[harq_pid%8], grant->L_prb);
grant->mcs.mod = last_mod[harq_pid%8];
grant->mcs.tbs = -1;
grant->mcs.mod = SRSLTE_MOD_LAST;
dci->rv_idx = dci->mcs_idx - 28;
DEBUG("TTI=%d, harq_pid=%d, mcs_idx=%d, tbs=%d, mod=%d, rv=%d\n",
harq_pid, harq_pid%8, dci->mcs_idx, tbs/8, grant->mcs.mod, dci->rv_idx);
}
if (tbs < 0) {
fprintf(stderr, "Error computing TBS\n");
return SRSLTE_ERROR;
} else {
grant->mcs.tbs = (uint32_t) tbs;
return SRSLTE_SUCCESS;
DEBUG("mcs_idx=%d, tbs=%d, mod=%d, rv=%d\n",
dci->mcs_idx, grant->mcs.tbs/8, grant->mcs.mod, dci->rv_idx);
}
}
@ -241,25 +224,21 @@ void srslte_ra_ul_grant_to_nbits(srslte_ra_ul_grant_t *grant, srslte_cp_t cp, ui
}
/** Compute PRB allocation for Uplink as defined in 8.1 and 8.4 of 36.213 */
int srslte_ra_ul_dci_to_grant(srslte_ra_ul_dci_t *dci, uint32_t nof_prb, uint32_t n_rb_ho, srslte_ra_ul_grant_t *grant,
uint32_t harq_pid)
int srslte_ra_ul_dci_to_grant(srslte_ra_ul_dci_t *dci, uint32_t nof_prb, uint32_t n_rb_ho, srslte_ra_ul_grant_t *grant)
{
// Compute PRB allocation
if (!srslte_ra_ul_dci_to_grant_prb_allocation(dci, grant, n_rb_ho, nof_prb)) {
// Compute MCS
if (!ul_dci_to_grant_mcs(dci, grant, harq_pid)) {
ul_dci_to_grant_mcs(dci, grant);
// Fill rest of grant structure
grant->mcs.idx = dci->mcs_idx;
grant->M_sc = grant->L_prb*SRSLTE_NRE;
grant->M_sc_init = grant->M_sc; // FIXME: What should M_sc_init be?
grant->Qm = srslte_mod_bits_x_symbol(grant->mcs.mod);
} else {
fprintf(stderr, "Error computing MCS\n");
return SRSLTE_ERROR;
}
} else {
printf("Error computing UL PRB allocation\n");
return SRSLTE_ERROR;
@ -442,8 +421,7 @@ int srslte_ra_dl_dci_to_grant_prb_allocation(srslte_ra_dl_dci_t *dci, srslte_ra_
}
int srslte_dl_fill_ra_mcs(srslte_ra_mcs_t *mcs, uint32_t nprb) {
uint32_t i_tbs = 0;
int tbs = -1;
int i_tbs = 0;
if (mcs->idx < 10) {
mcs->mod = SRSLTE_MOD_QPSK;
i_tbs = mcs->idx;
@ -455,24 +433,20 @@ int srslte_dl_fill_ra_mcs(srslte_ra_mcs_t *mcs, uint32_t nprb) {
i_tbs = mcs->idx-2;
} else if (mcs->idx == 29) {
mcs->mod = SRSLTE_MOD_QPSK;
tbs = 0;
i_tbs = 0;
i_tbs = -1;
} else if (mcs->idx == 30) {
mcs->mod = SRSLTE_MOD_16QAM;
tbs = 0;
i_tbs = 0;
i_tbs = -1;
} else if (mcs->idx == 31) {
mcs->mod = SRSLTE_MOD_64QAM;
tbs = 0;
i_tbs = 0;
i_tbs = -1;
}
if (tbs == -1) {
int tbs = -1;
if (i_tbs >= 0) {
tbs = srslte_ra_tbs_from_idx(i_tbs, nprb);
if (tbs >= 0) {
mcs->tbs = tbs;
}
}
return tbs;
}
@ -555,26 +529,14 @@ static int dl_dci_to_grant_mcs(srslte_ra_dl_dci_t *dci, srslte_ra_dl_grant_t *gr
grant->nof_tb = 0;
if (dci->tb_en[0]) {
grant->mcs[0].idx = dci->mcs_idx;
tbs = srslte_dl_fill_ra_mcs(&grant->mcs[0], n_prb);
if (tbs) {
last_dl_tbs[dci->harq_process%8] = tbs;
} else {
// For mcs>=29, set last TBS received for this PID
grant->mcs[0].tbs = last_dl_tbs[dci->harq_process%8];
}
grant->mcs[0].tbs = srslte_dl_fill_ra_mcs(&grant->mcs[0], n_prb);
grant->nof_tb++;
} else {
grant->mcs[0].tbs = 0;
}
if (dci->tb_en[1]) {
grant->mcs[1].idx = dci->mcs_idx_1;
tbs = srslte_dl_fill_ra_mcs(&grant->mcs[1], n_prb);
if (tbs) {
last_dl_tbs2[dci->harq_process%8] = tbs;
} else {
// For mcs>=29, set last TBS received for this PID
grant->mcs[1].tbs = last_dl_tbs2[dci->harq_process%8];
}
grant->mcs[1].tbs = srslte_dl_fill_ra_mcs(&grant->mcs[1], n_prb);
} else {
grant->mcs[1].tbs = 0;
}

2
lib/src/phy/phch/test/pusch_test.c
View File

@ -136,7 +136,7 @@ int main(int argc, char **argv) {
dci.mcs_idx = mcs_idx;
srslte_ra_ul_grant_t grant;
if (srslte_ra_ul_dci_to_grant(&dci, cell.nof_prb, 0, &grant, 0)) {
if (srslte_ra_ul_dci_to_grant(&dci, cell.nof_prb, 0, &grant)) {
fprintf(stderr, "Error computing resource allocation\n");
return ret;
}

2
srsenb/src/phy/phch_worker.cc
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@ -408,7 +408,7 @@ int phch_worker::decode_pusch(srslte_enb_ul_pusch_t *grants, uint32_t nof_pusch)
srslte_ra_ul_grant_t phy_grant;
int res = -1;
if (!srslte_ra_ul_dci_to_grant(&grants[i].grant, enb_ul.cell.nof_prb, n_rb_ho, &phy_grant, tti_rx%8)) {
if (!srslte_ra_ul_dci_to_grant(&grants[i].grant, enb_ul.cell.nof_prb, n_rb_ho, &phy_grant)) {
if (phy_grant.mcs.mod == SRSLTE_MOD_64QAM) {
phy_grant.mcs.mod = SRSLTE_MOD_16QAM;
}

5
srsue/hdr/phy/phch_worker.h
View File

@ -150,6 +150,11 @@ private:
float cfo;
bool rar_cqi_request;
// Save last TBS for mcs>28 cases
int last_dl_tbs[2*HARQ_DELAY_MS][SRSLTE_MAX_CODEWORDS];
int last_ul_tbs[2*HARQ_DELAY_MS];
srslte_mod_t last_ul_mod[2*HARQ_DELAY_MS];
// Metrics
dl_metrics_t dl_metrics;
ul_metrics_t ul_metrics;

33
srsue/src/phy/phch_worker.cc
View File

@ -478,10 +478,20 @@ bool phch_worker::decode_pdcch_dl(srsue::mac_interface_phy::mac_grant_t* grant)
return false;
}
grant->pid = ASYNC_DL_SCHED?dci_unpacked.harq_process:(tti%(2*HARQ_DELAY_MS));
// Set last TBS for this TB (pid) in case of mcs>29 (7.1.7.2 of 36.213)
for (int i=0;i<SRSLTE_MAX_CODEWORDS;i++) {
if (grant->phy_grant.dl.mcs[i].tbs < 0) {
grant->phy_grant.dl.mcs[i].tbs = last_dl_tbs[grant->pid%(2*HARQ_DELAY_MS)][i];
}
// save it
last_dl_tbs[grant->pid%(2*HARQ_DELAY_MS)][i] = grant->phy_grant.dl.mcs[i].tbs;
}
/* Fill MAC grant structure */
grant->ndi[0] = dci_unpacked.ndi;
grant->ndi[1] = dci_unpacked.ndi_1;
grant->pid = ASYNC_DL_SCHED?dci_unpacked.harq_process:(tti%(2*HARQ_DELAY_MS));
grant->n_bytes[0] = grant->phy_grant.dl.mcs[0].tbs / (uint32_t) 8;
grant->n_bytes[1] = grant->phy_grant.dl.mcs[1].tbs / (uint32_t) 8;
grant->tti = tti;
@ -718,14 +728,29 @@ bool phch_worker::decode_pdcch_ul(mac_interface_phy::mac_grant_t* grant)
ue_dl.last_location_ul.ncce, (1<<ue_dl.last_location_ul.L), dci_msg.nof_bits, hexstr);
if (grant->phy_grant.ul.mcs.tbs==0) {
srslte_vec_fprint_hex(stdout, dci_msg.data, dci_msg.nof_bits);
Info("Received PUSCH grant with empty data\n");
}
}
}
if (ret) {
// Use last TBS for this TB in case of mcs>28
if (grant->phy_grant.ul.mcs.tbs < 0) {
grant->phy_grant.ul.mcs.tbs = last_ul_tbs[tti%(2*HARQ_DELAY_MS)];
}
last_ul_tbs[tti%(2*HARQ_DELAY_MS)] = grant->phy_grant.ul.mcs.tbs;
if (grant->phy_grant.ul.mcs.mod == SRSLTE_MOD_LAST) {
grant->phy_grant.ul.mcs.mod = last_ul_mod[tti%(2*HARQ_DELAY_MS)];
grant->phy_grant.ul.Qm = srslte_mod_bits_x_symbol(grant->phy_grant.ul.mcs.mod);
}
last_ul_mod[tti%(2*HARQ_DELAY_MS)] = grant->phy_grant.ul.mcs.mod;
}
/* Limit UL modulation if not supported by the UE or disabled by higher layers */
if (!phy->config->enable_64qam) {
if (grant->phy_grant.ul.mcs.mod == SRSLTE_MOD_64QAM) {
if (grant->phy_grant.ul.mcs.mod >= SRSLTE_MOD_64QAM) {
grant->phy_grant.ul.mcs.mod = SRSLTE_MOD_16QAM;
grant->phy_grant.ul.Qm = 4;
}
@ -925,7 +950,7 @@ void phch_worker::encode_pusch(srslte_ra_ul_grant_t *grant, uint8_t *payload, ui
#endif
Info("PUSCH: tti_tx=%d, alloc=(%d,%d), tbs=%d, mcs=%d, rv=%d, ack=%s, ri=%s, cfo=%.1f KHz%s\n",
(tti+4)%10240,
(tti+HARQ_DELAY_MS)%10240,
grant->n_prb[0], grant->n_prb[0]+grant->L_prb,
grant->mcs.tbs/8, grant->mcs.idx, rv,
uci_data.uci_ack_len>0?(uci_data.uci_ack?"1":"0"):"no",