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srsRAN_4G
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Merge branch 'oai_blind_search' into next

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master
Ismael Gomez 8 years ago
parent 2b3087b1f9 ceddb15deb
commit 867ed0feee
5 changed files with 95 additions and 118 deletions
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3
srslte/examples/cell_measurement.c
Unescape Escape View File

@ -307,8 +307,7 @@ int main(int argc, char **argv) {
case DECODE_SIB:
/* We are looking for SI Blocks, search only in appropiate places */
if ((srslte_ue_sync_get_sfidx(&ue_sync) == 5 && (sfn%2)==0)) {
n = srslte_ue_dl_decode_rnti_rv(&ue_dl, sf_buffer, data, srslte_ue_sync_get_sfidx(&ue_sync), SRSLTE_SIRNTI,
((int) ceilf((float)3*(((sfn)/2)%4)/2))%4);
n = srslte_ue_dl_decode(&ue_dl, sf_buffer, data, sfn*10+srslte_ue_sync_get_sfidx(&ue_sync));
if (n < 0) {
fprintf(stderr, "Error decoding UE DL\n");fflush(stdout);
return -1;

29
srslte/examples/pdsch_ue.c
Unescape Escape View File

@ -495,7 +495,7 @@ int main(int argc, char **argv) {
decode_pdsch = true;
} else {
/* We are looking for SIB1 Blocks, search only in appropiate places */
if ((srslte_ue_sync_get_sfidx(&ue_sync) == 5 && (sfn%8)==0)) {
if ((srslte_ue_sync_get_sfidx(&ue_sync) == 5 && (sfn%2)==0)) {
decode_pdsch = true;
} else {
decode_pdsch = false;
@ -503,28 +503,21 @@ int main(int argc, char **argv) {
}
if (decode_pdsch) {
INFO("Attempting DL decode SFN=%d\n", sfn);
if (prog_args.rnti != SRSLTE_SIRNTI) {
n = srslte_ue_dl_decode(&ue_dl, &sf_buffer[prog_args.time_offset], data, srslte_ue_sync_get_sfidx(&ue_sync));
} else {
// RV for SIB1 is predefined
uint32_t k = (sfn/2)%4;
uint32_t rv = ((uint32_t) ceilf((float)1.5*k))%4;
n = srslte_ue_dl_decode_rnti_rv(&ue_dl, &sf_buffer[prog_args.time_offset], data,
srslte_ue_sync_get_sfidx(&ue_sync),
SRSLTE_SIRNTI, rv);
n = srslte_ue_dl_decode(&ue_dl,
&sf_buffer[prog_args.time_offset],
data,
sfn*10+srslte_ue_sync_get_sfidx(&ue_sync));
/*
if (n>0) {
printf("Saving signal...\n");
srslte_ue_dl_save_signal(&ue_dl, &ue_dl.softbuffer, sfn*10+srslte_ue_sync_get_sfidx(&ue_sync), rv, prog_args.rnti);
exit(-1);
}
*/
}
if (n < 0) {
// fprintf(stderr, "Error decoding UE DL\n");fflush(stdout);
} else if (n > 0) {
/*
printf("Saving signal...\n");
srslte_ue_dl_save_signal(&ue_dl, &ue_dl.softbuffer, sfn*10+srslte_ue_sync_get_sfidx(&ue_sync), rv, prog_args.rnti);
exit(-1);
*/
/* Send data if socket active */
if (prog_args.net_port > 0) {
srslte_netsink_write(&net_sink, data, 1+(n-1)/8);

11
srslte/include/srslte/ue/ue_dl.h
Unescape Escape View File

@ -141,21 +141,14 @@ SRSLTE_API void srslte_ue_dl_set_sample_offset(srslte_ue_dl_t * q,
SRSLTE_API int srslte_ue_dl_decode(srslte_ue_dl_t * q,
cf_t *input,
uint8_t *data,
uint32_t sf_idx);
uint32_t tti);
SRSLTE_API int srslte_ue_dl_decode_rnti(srslte_ue_dl_t * q,
cf_t *input,
uint8_t *data,
uint32_t sf_idx,
uint32_t tti,
uint16_t rnti);
SRSLTE_API int srslte_ue_dl_decode_rnti_rv(srslte_ue_dl_t * q,
cf_t *input,
uint8_t * data,
uint32_t sf_idx,
uint16_t rnti,
uint32_t rvidx);
SRSLTE_API bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q,
uint32_t sf_idx,
uint32_t n_prb_lowest,

23
srslte/lib/phch/pdcch.c
Unescape Escape View File

@ -187,7 +187,7 @@ uint32_t srslte_pdcch_ue_locations_ncce(uint32_t nof_cce, srslte_dci_location_t
int l; // this must be int because of the for(;;--) loop
uint32_t i, k, L, m;
uint32_t Yk, ncce;
const int M[4] = { 6, 6, 2, 2 };
const int S[4] = { 6, 12, 8, 16 };
// Compute Yk for this subframe
Yk = rnti;
@ -200,7 +200,7 @@ uint32_t srslte_pdcch_ue_locations_ncce(uint32_t nof_cce, srslte_dci_location_t
for (l = 3; l >= 0; l--) {
L = (1 << l);
// For all possible ncce offset
for (i = 0; i < M[l]; i++) {
for (i = 0; i < SRSLTE_MIN(nof_cce / L, S[l]/PDCCH_FORMAT_NOF_CCE(l)); i++) {
if (nof_cce > L) {
ncce = L * ((Yk + i) % (nof_cce / L));
if (k < max_candidates && ncce + L <= nof_cce)
@ -240,22 +240,17 @@ uint32_t srslte_pdcch_common_locations(srslte_pdcch_t *q, srslte_dci_location_t
uint32_t srslte_pdcch_common_locations_ncce(uint32_t nof_cce, srslte_dci_location_t *c, uint32_t max_candidates)
{
uint32_t i, l, L, k;
const int M[4] = { 0, 0, 4, 2 };
k = 0;
for (l = 3; l > 1; l--) {
L = (1 << l);
for (i = 0; i < M[l]; i++) {
if (nof_cce > L) {
uint32_t ncce = L * (i % (nof_cce / L));
if (k < max_candidates && ncce + L <= nof_cce)
{
c[k].L = l;
c[k].ncce = ncce;
DEBUG("Common SS Candidate %d: nCCE: %d, L: %d\n",
k, c[k].ncce, c[k].L);
k++;
}
for (i = 0; i < SRSLTE_MIN(nof_cce, 16) / (L); i++) {
if (k < max_candidates) {
c[k].L = l;
c[k].ncce = (L) * (i % (nof_cce / (L)));
DEBUG("Common SS Candidate %d: nCCE: %d, L: %d\n",
k, c[k].ncce, c[k].L);
k++;
}
}
}

143
srslte/lib/ue/ue_dl.c
Unescape Escape View File

@ -178,12 +178,8 @@ void srslte_ue_dl_set_sample_offset(srslte_ue_dl_t * q, float sample_offset) {
* - PDCCH decoding: Find DCI for RNTI given by previous call to srslte_ue_dl_set_rnti()
* - PDSCH decoding: Decode TB scrambling with RNTI given by srslte_ue_dl_set_rnti()
*/
int srslte_ue_dl_decode(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t sf_idx) {
return srslte_ue_dl_decode_rnti_rv(q, input, data, sf_idx, q->current_rnti, 0);
}
int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t sf_idx, uint16_t rnti) {
return srslte_ue_dl_decode_rnti_rv(q, input, data, sf_idx, rnti, 0);
int srslte_ue_dl_decode(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t tti) {
return srslte_ue_dl_decode_rnti(q, input, data, tti, q->current_rnti);
}
int srslte_ue_dl_decode_fft_estimate(srslte_ue_dl_t *q, cf_t *input, uint32_t sf_idx, uint32_t *cfi) {
@ -241,47 +237,86 @@ int srslte_ue_dl_cfg_grant(srslte_ue_dl_t *q, srslte_ra_dl_grant_t *grant, uint3
return srslte_pdsch_cfg(&q->pdsch_cfg, q->cell, grant, cfi, sf_idx, rvidx);
}
int srslte_ue_dl_decode_rnti_rv_packet(srslte_ue_dl_t *q, srslte_ra_dl_grant_t *grant, uint8_t *data,
uint32_t cfi, uint32_t sf_idx, uint16_t rnti, uint32_t rvidx)
int srslte_ue_dl_decode_rnti(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t tti, uint16_t rnti)
{
srslte_dci_msg_t dci_msg;
srslte_ra_dl_dci_t dci_unpacked;
srslte_ra_dl_grant_t grant;
int ret = SRSLTE_ERROR;
uint32_t cfi;
q->nof_detected++;
uint32_t sf_idx = tti%10;
/* Setup PDSCH configuration for this CFI, SFIDX and RVIDX */
if (srslte_ue_dl_cfg_grant(q, grant, cfi, sf_idx, rvidx)) {
return SRSLTE_ERROR;
if ((ret = srslte_ue_dl_decode_fft_estimate(q, input, sf_idx, &cfi)) < 0) {
return ret;
}
if (q->pdsch_cfg.rv == 0) {
srslte_softbuffer_rx_reset_tbs(&q->softbuffer, grant->mcs.tbs);
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;
}
// Uncoment next line to do ZF by default in pdsch_ue example
//float noise_estimate = 0;
float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
if (q->pdsch_cfg.grant.mcs.mod > 0 && q->pdsch_cfg.grant.mcs.tbs >= 0) {
ret = srslte_pdsch_decode_rnti(&q->pdsch, &q->pdsch_cfg, &q->softbuffer,
q->sf_symbols, q->ce,
noise_estimate,
rnti, data);
if (ret == SRSLTE_ERROR) {
q->pkt_errors++;
} else if (ret == SRSLTE_ERROR_INVALID_INPUTS) {
fprintf(stderr, "Error calling srslte_pdsch_decode()\n");
} else if (ret == SRSLTE_SUCCESS) {
if (SRSLTE_VERBOSE_ISDEBUG()) {
INFO("Decoded Message: ", 0);
srslte_vec_fprint_hex(stdout, data, q->pdsch_cfg.grant.mcs.tbs);
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)) {
fprintf(stderr, "Error unpacking DCI\n");
return SRSLTE_ERROR;
}
/* ===== These lines of code are supposed to be MAC functionality === */
uint32_t rvidx = 0;
if (dci_unpacked.rv_idx < 0) {
uint32_t sfn = tti/10;
uint32_t k = (sfn/2)%4;
rvidx = ((uint32_t) ceilf((float)1.5*k))%4;
srslte_softbuffer_rx_reset_tbs(&q->softbuffer, grant.mcs.tbs);
} else {
rvidx = dci_unpacked.rv_idx;
srslte_softbuffer_rx_reset_tbs(&q->softbuffer, grant.mcs.tbs);
}
if (srslte_ue_dl_cfg_grant(q, &grant, cfi, sf_idx, rvidx)) {
return SRSLTE_ERROR;
}
/* ===== End of MAC functionality ========== */
q->nof_detected++;
// Uncoment next line to do ZF by default in pdsch_ue example
//float noise_estimate = 0;
float noise_estimate = srslte_chest_dl_get_noise_estimate(&q->chest);
if (q->pdsch_cfg.grant.mcs.mod > 0 && q->pdsch_cfg.grant.mcs.tbs >= 0) {
ret = srslte_pdsch_decode_rnti(&q->pdsch, &q->pdsch_cfg, &q->softbuffer,
q->sf_symbols, q->ce,
noise_estimate,
rnti, data);
if (ret == SRSLTE_ERROR) {
q->pkt_errors++;
} else if (ret == SRSLTE_ERROR_INVALID_INPUTS) {
fprintf(stderr, "Error calling srslte_pdsch_decode()\n");
} else if (ret == SRSLTE_SUCCESS) {
if (SRSLTE_VERBOSE_ISDEBUG()) {
INFO("Decoded Message: ", 0);
srslte_vec_fprint_hex(stdout, data, q->pdsch_cfg.grant.mcs.tbs);
}
}
}
q->pkts_total++;
}
return ret;
}
q->pkts_total++;
if (found_dci == 1 && ret == SRSLTE_SUCCESS) {
return q->pdsch_cfg.grant.mcs.tbs;
} else {
return 0;
}
}
uint32_t srslte_ue_dl_get_ncce(srslte_ue_dl_t *q) {
return q->last_location.ncce;
@ -423,44 +458,6 @@ int srslte_ue_dl_find_dl_dci_type(srslte_ue_dl_t *q, uint32_t cfi, uint32_t sf_i
}
}
int srslte_ue_dl_decode_rnti_rv(srslte_ue_dl_t *q, cf_t *input, uint8_t *data, uint32_t sf_idx, uint16_t rnti, uint32_t rvidx)
{
srslte_dci_msg_t dci_msg;
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, &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, cfi)) {
fprintf(stderr, "Error extracting LLRs\n");
return SRSLTE_ERROR;
}
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)) {
fprintf(stderr, "Error unpacking DCI\n");
return SRSLTE_ERROR;
}
ret = srslte_ue_dl_decode_rnti_rv_packet(q, &grant, data, cfi, sf_idx, rnti, rvidx);
}
if (found_dci == 1 && ret == SRSLTE_SUCCESS) {
return q->pdsch_cfg.grant.mcs.tbs;
} else {
return 0;
}
}
bool srslte_ue_dl_decode_phich(srslte_ue_dl_t *q, uint32_t sf_idx, uint32_t n_prb_lowest, uint32_t n_dmrs)
{
uint8_t ack_bit;

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