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srsRAN_4G
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fixed issues in new dci search

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master
Ismael Gomez 8 years ago
parent 3941589cc5
commit f605400bed
4 changed files with 53 additions and 41 deletions
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2
srslte/examples/pdsch_ue.c
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@ -536,7 +536,7 @@ int main(int argc, char **argv) {
memcmp(&ue_dl.dl_dci.type2_alloc, &old_dl_dci.type2_alloc, sizeof(srslte_ra_type2_t)))
{
memcpy(&old_dl_dci, &ue_dl.dl_dci, sizeof(srslte_ra_dl_dci_t));
fflush(stdout);printf("\nCFI:\t%d\n", ue_dl.cfi);
fflush(stdout);
printf("Format: %s\n", srslte_dci_format_string(ue_dl.dci_format));
srslte_ra_pdsch_fprint(stdout, &old_dl_dci, cell.nof_prb);
srslte_ra_dl_grant_fprint(stdout, &ue_dl.pdsch_cfg.grant);

4
srslte/include/srslte/ue/ue_dl.h
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@ -80,7 +80,6 @@ typedef struct SRSLTE_API {
cf_t *ce[SRSLTE_MAX_PORTS];
srslte_dci_format_t dci_format;
uint32_t cfi;
uint64_t pkt_errors;
uint64_t pkts_total;
uint64_t nof_detected;
@ -172,7 +171,8 @@ SRSLTE_API void srslte_ue_dl_save_signal(srslte_ue_dl_t *q,
srslte_softbuffer_rx_t *softbuffer,
uint32_t tti,
uint32_t rv_idx,
uint16_t rnti);
uint16_t rnti,
uint32_t cfi);
#endif

10
srslte/lib/phch/pdcch.c
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@ -322,14 +322,15 @@ int srslte_pdcch_decode_msg(srslte_pdcch_t *q,
int ret = SRSLTE_ERROR_INVALID_INPUTS;
if (q != NULL &&
msg != NULL &&
srslte_dci_location_isvalid(location) &&
crc_rem != NULL)
srslte_dci_location_isvalid(location))
{
if (location->ncce * 72 + PDCCH_FORMAT_NOF_BITS(location->L) >
q->nof_cce*72) {
fprintf(stderr, "Invalid location: nCCE: %d, L: %d, NofCCE: %d\n",
location->ncce, location->L, q->nof_cce);
} else {
ret = SRSLTE_SUCCESS;
uint32_t nof_bits = srslte_dci_format_sizeof_lut(format, q->cell.nof_prb);
uint32_t e_bits = PDCCH_FORMAT_NOF_BITS(location->L);
@ -349,6 +350,8 @@ int srslte_pdcch_decode_msg(srslte_pdcch_t *q,
} else {
msg->format = format;
}
} else {
fprintf(stderr, "Error calling pdcch_dci_decode\n");
}
if (crc_rem) {
DEBUG("Decoded DCI: nCCE=%d, L=%d, format=%s, msg_len=%d, mean=%f, crc_rem=0x%x\n",
@ -357,9 +360,10 @@ int srslte_pdcch_decode_msg(srslte_pdcch_t *q,
} else {
DEBUG("Skipping DCI: nCCE=%d, L=%d, msg_len=%d, mean=%f\n",
location->ncce, location->L, nof_bits, mean);
ret = SRSLTE_SUCCESS;
}
}
} else {
fprintf(stderr, "Invalid parameters, location=%d,%d\n", location->ncce, location->L);
}
return ret;
}

68
srslte/lib/ue/ue_dl.c
Unescape Escape View File

@ -303,32 +303,29 @@ static int dci_blind_search(srslte_ue_dl_t *q, dci_blind_search_t *search_space,
if (rnti) {
ret = 0;
int i=0;
do {
printf("Searching format %s in %d,%d\n",
while (!ret && i < search_space->nof_locations) {
INFO("Searching format %s in %d,%d\n",
srslte_dci_format_string(search_space->format), search_space->loc[i].ncce, search_space->loc[i].L);
if (srslte_pdcch_decode_msg(&q->pdcch, dci_msg, &search_space->loc[i], search_space->format, &crc_rem)) {
fprintf(stderr, "Error decoding DCI msg\n");
return SRSLTE_ERROR;
}
if (crc_rem == rnti) {
printf("Found crc_rem=0x%x, format=%d\n", rnti, dci_msg->format);
// If searching for Format1A but found Format0 save it for later
if (dci_msg->format == SRSLTE_DCI_FORMAT0 && search_space->format == SRSLTE_DCI_FORMAT1A)
{
q->pending_ul_dci_rnti = crc_rem;
memcpy(&q->pending_ul_dci_msg, dci_msg, sizeof(srslte_dci_msg_t));
printf("Saved UL for later\n");
// Else if we found it, save location and leave
} else if (dci_msg->format == search_space->format)
{
} else if (dci_msg->format == search_space->format) {
ret = 1;
memcpy(&q->last_location, &search_space->loc[i], sizeof(srslte_dci_location_t));
} else {
printf("msg_format=%d, search_format=%d\n", dci_msg->format, search_space->format);
}
}
i++;
} while (!ret && i < search_space->nof_locations);
}
} else {
fprintf(stderr, "RNTI not specified\n");
}
return ret;
}
@ -347,7 +344,7 @@ int srslte_ue_dl_find_ul_dci(srslte_ue_dl_t *q, uint32_t cfi, uint32_t sf_idx, u
dci_blind_search_t search_space;
search_space.format = SRSLTE_DCI_FORMAT0;
search_space.nof_locations = srslte_pdcch_ue_locations(&q->pdcch, search_space.loc, MAX_CANDIDATES_UE, sf_idx, cfi, rnti);
printf("Searching UL C-RNTI in %d ue locations\n", search_space.nof_locations);
INFO("Searching UL C-RNTI in %d ue locations\n", search_space.nof_locations);
return dci_blind_search(q, &search_space, rnti, dci_msg);
} else {
return 0;
@ -375,36 +372,45 @@ static int find_dl_dci_type_siprarnti(srslte_ue_dl_t *q, uint32_t cfi, uint16_t
int ret = 0;
// Configure and run DCI blind search
dci_blind_search_t search_space;
search_space.nof_locations = srslte_pdcch_common_locations(&q->pdcch, search_space.loc, MAX_CANDIDATES_COM, q->cfi);
printf("Searching SI/P/RA-RNTI in %d common locations, %d formats\n", search_space.nof_locations, nof_common_formats);
for (int f=0;f<nof_common_formats;f++) {
search_space.format = common_formats[f];
if ((ret = dci_blind_search(q, &search_space, rnti, dci_msg))) {
return ret;
search_space.nof_locations = srslte_pdcch_common_locations(&q->pdcch, search_space.loc, MAX_CANDIDATES_COM, cfi);
INFO("Searching SI/P/RA-RNTI in %d common locations, %d formats\n", search_space.nof_locations, nof_common_formats);
// Search for RNTI only if there is room for the common search space
if (search_space.nof_locations > 0) {
for (int f=0;f<nof_common_formats;f++) {
search_space.format = common_formats[f];
if ((ret = dci_blind_search(q, &search_space, rnti, dci_msg))) {
return ret;
}
}
}
return 0;
return SRSLTE_SUCCESS;
}
// Blind search for C-RNTI
static int find_dl_dci_type_crnti(srslte_ue_dl_t *q, uint32_t cfi, uint32_t sf_idx, uint16_t rnti, srslte_dci_msg_t *dci_msg)
{
int ret = 0;
int ret = SRSLTE_SUCCESS;
// Search UE-specific search space
dci_blind_search_t search_space;
search_space.nof_locations = srslte_pdcch_ue_locations(&q->pdcch, search_space.loc, MAX_CANDIDATES_UE, sf_idx, q->cfi, rnti);
printf("Searching DL C-RNTI in %d ue locations, %d formats\n", search_space.nof_locations, nof_ue_formats);
search_space.nof_locations = srslte_pdcch_ue_locations(&q->pdcch, search_space.loc, MAX_CANDIDATES_UE, sf_idx, cfi, rnti);
INFO("Searching DL C-RNTI in %d ue locations, %d formats\n", search_space.nof_locations, nof_ue_formats);
for (int f=0;f<nof_ue_formats;f++) {
search_space.format = ue_formats[f];
if ((ret = dci_blind_search(q, &search_space, rnti, dci_msg))) {
return ret;
}
}
// Search Common search space for Format 1A
// Search Format 1A in the Common SS also
search_space.format = SRSLTE_DCI_FORMAT1A;
search_space.nof_locations = srslte_pdcch_common_locations(&q->pdcch, search_space.loc, MAX_CANDIDATES_COM, q->cfi);
printf("Searching DL C-RNTI in %d ue locations, format 1A\n", search_space.nof_locations, nof_ue_formats);
return dci_blind_search(q, &search_space, rnti, dci_msg);
search_space.nof_locations = srslte_pdcch_common_locations(&q->pdcch, search_space.loc, MAX_CANDIDATES_COM, cfi);
// Search for RNTI only if there is room for the common search space
if (search_space.nof_locations > 0) {
INFO("Searching DL C-RNTI in %d ue locations, format 1A\n", search_space.nof_locations, nof_ue_formats);
return dci_blind_search(q, &search_space, rnti, dci_msg);
}
return SRSLTE_SUCCESS;
}
int srslte_ue_dl_find_dl_dci_type(srslte_ue_dl_t *q, uint32_t cfi, uint32_t sf_idx,
@ -424,17 +430,19 @@ int srslte_ue_dl_decode_rnti_rv(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, u
srslte_ra_dl_dci_t dci_unpacked;
srslte_ra_dl_grant_t grant;
int ret = SRSLTE_ERROR;
uint32_t cfi;
if ((ret = srslte_ue_dl_decode_fft_estimate(q, input, sf_idx, &q->cfi)) < 0) {
if ((ret = srslte_ue_dl_decode_fft_estimate(q, input, sf_idx, &cfi)) < 0) {
return ret;
}
if (srslte_pdcch_extract_llr(&q->pdcch, q->sf_symbols, q->ce, srslte_chest_dl_get_noise_estimate(&q->chest), sf_idx, q->cfi)) {
if (srslte_pdcch_extract_llr(&q->pdcch, q->sf_symbols, q->ce, srslte_chest_dl_get_noise_estimate(&q->chest), sf_idx, cfi)) {
fprintf(stderr, "Error extracting LLRs\n");
return SRSLTE_ERROR;
}
int found_dci = srslte_ue_dl_find_dl_dci(q, q->cfi, sf_idx, rnti, &dci_msg);
int found_dci = srslte_ue_dl_find_dl_dci(q, cfi, sf_idx, rnti, &dci_msg);
if (found_dci == 1) {
if (srslte_dci_msg_to_dl_grant(&dci_msg, rnti, q->cell.nof_prb, q->cell.nof_ports, &dci_unpacked, &grant)) {
@ -442,7 +450,7 @@ int srslte_ue_dl_decode_rnti_rv(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, u
return SRSLTE_ERROR;
}
ret = srslte_ue_dl_decode_rnti_rv_packet(q, &grant, data, q->cfi, sf_idx, rnti, rvidx);
ret = srslte_ue_dl_decode_rnti_rv_packet(q, &grant, data, cfi, sf_idx, rnti, rvidx);
}
if (found_dci == 1 && ret == SRSLTE_SUCCESS) {
@ -474,7 +482,7 @@ bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q, uint32_t sf_idx, uint32_t n_pr
}
}
void srslte_ue_dl_save_signal(srslte_ue_dl_t *q, srslte_softbuffer_rx_t *softbuffer, uint32_t tti, uint32_t rv_idx, uint16_t rnti) {
void srslte_ue_dl_save_signal(srslte_ue_dl_t *q, srslte_softbuffer_rx_t *softbuffer, uint32_t tti, uint32_t rv_idx, uint16_t rnti, uint32_t cfi) {
srslte_vec_save_file("sf_symbols", q->sf_symbols, SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
printf("%d samples\n", SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp));
srslte_vec_save_file("ce0", q->ce[0], SRSLTE_SF_LEN_RE(q->cell.nof_prb, q->cell.cp)*sizeof(cf_t));
@ -502,7 +510,7 @@ void srslte_ue_dl_save_signal(srslte_ue_dl_t *q, srslte_softbuffer_rx_t *softbuf
snprintf(tmpstr,64,"rmout_%d.dat",i);
srslte_vec_save_file(tmpstr, softbuffer->buffer_f[i], (3*cb_len+12)*sizeof(int16_t));
}
printf("Saved files for tti=%d, sf=%d, cfi=%d, mcs=%d, rv=%d, rnti=%d\n", tti, tti%10, q->cfi,
printf("Saved files for tti=%d, sf=%d, cfi=%d, mcs=%d, rv=%d, rnti=%d\n", tti, tti%10, cfi,
q->pdsch_cfg.grant.mcs.idx, rv_idx, rnti);
}

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