5g-team
/
srsRAN_4G
mirror of https://github.com/pvnis/srsRAN_4G.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

SRSENB: PHY reports MAC all UL grants

Browse Source
master
Xavier Arteaga 5 years ago committed by Xavier Arteaga
parent fbce38dc27
commit 6398cd841d
2 changed files with 106 additions and 81 deletions
Show Stats Download Patch File Download Diff File

17
srsenb/hdr/phy/cc_worker.h
Unescape Escape View File

@ -66,13 +66,16 @@ private:
constexpr static float PUSCH_RL_SNR_DB_TH = 1.0f;
constexpr static float PUCCH_RL_CORR_TH = 0.15f;
int encode_pdsch(stack_interface_phy_lte::dl_sched_grant_t* grants, uint32_t nof_grants);
int encode_pmch(stack_interface_phy_lte::dl_sched_grant_t* grant, srslte_mbsfn_cfg_t* mbsfn_cfg);
int decode_pusch(stack_interface_phy_lte::ul_sched_grant_t* grants, uint32_t nof_pusch);
int encode_phich(stack_interface_phy_lte::ul_sched_ack_t* acks, uint32_t nof_acks);
int encode_pdcch_dl(stack_interface_phy_lte::dl_sched_grant_t* grants, uint32_t nof_grants);
int encode_pdcch_ul(stack_interface_phy_lte::ul_sched_grant_t* grants, uint32_t nof_grants);
int decode_pucch();
int encode_pdsch(stack_interface_phy_lte::dl_sched_grant_t* grants, uint32_t nof_grants);
int encode_pmch(stack_interface_phy_lte::dl_sched_grant_t* grant, srslte_mbsfn_cfg_t* mbsfn_cfg);
void decode_pusch_rnti(stack_interface_phy_lte::ul_sched_grant_t& ul_grant,
srslte_ul_cfg_t& ul_cfg,
srslte_pusch_res_t& pusch_res);
void decode_pusch(stack_interface_phy_lte::ul_sched_grant_t* grants, uint32_t nof_pusch);
int encode_phich(stack_interface_phy_lte::ul_sched_ack_t* acks, uint32_t nof_acks);
int encode_pdcch_dl(stack_interface_phy_lte::dl_sched_grant_t* grants, uint32_t nof_grants);
int encode_pdcch_ul(stack_interface_phy_lte::ul_sched_grant_t* grants, uint32_t nof_grants);
int decode_pucch();
/* Common objects */
srslte::log* log_h = nullptr;

170
srsenb/src/phy/cc_worker.cc
Unescape Escape View File

@ -272,99 +272,121 @@ void cc_worker::work_dl(const srslte_dl_sf_cfg_t& dl_sf_cfg,
srslte_enb_dl_gen_signal(&enb_dl);
}
int cc_worker::decode_pusch(stack_interface_phy_lte::ul_sched_grant_t* grants, uint32_t nof_pusch)
void cc_worker::decode_pusch_rnti(stack_interface_phy_lte::ul_sched_grant_t& ul_grant,
srslte_ul_cfg_t& ul_cfg,
srslte_pusch_res_t& pusch_res)
{
srslte_pusch_res_t pusch_res;
for (uint32_t i = 0; i < nof_pusch; i++) {
// Get grant itself and RNTI
auto& ul_grant = grants[i];
uint16_t rnti = ul_grant.dci.rnti;
uint16_t rnti = ul_grant.dci.rnti;
if (rnti && ue_db.count(rnti)) {
// Get UE configuration
srslte_ul_cfg_t ul_cfg = phy->ue_db.get_ul_config(rnti, cc_idx);
// Invalid RNTI
if (rnti == 0) {
return;
}
// mark this tti as having an ul dci to avoid pucch
ue_db[rnti]->is_grant_available = true;
// RNTI does not exist
if (ue_db.count(rnti) == 0) {
return;
}
// Fill UCI configuration
phy->ue_db.fill_uci_cfg(tti_rx, cc_idx, rnti, grants->dci.cqi_request, true, ul_cfg.pusch.uci_cfg);
// Get UE configuration
ul_cfg = phy->ue_db.get_ul_config(rnti, cc_idx);
// Compute UL grant
srslte_pusch_grant_t& grant = ul_cfg.pusch.grant;
if (srslte_ra_ul_dci_to_grant(&enb_ul.cell, &ul_sf, &ul_cfg.hopping, &ul_grant.dci, &grant)) {
Error("Computing PUSCH dci\n");
return SRSLTE_ERROR;
}
// mark this tti as having an ul dci to avoid pucch
ue_db[rnti]->is_grant_available = true;
uint32_t ul_pid = TTI_RX(ul_sf.tti) % SRSLTE_FDD_NOF_HARQ;
// Fill UCI configuration
phy->ue_db.fill_uci_cfg(tti_rx, cc_idx, rnti, ul_grant.dci.cqi_request, true, ul_cfg.pusch.uci_cfg);
// Handle Format0 adaptive retx
// Use last TBS for this TB in case of mcs>28
if (ul_grant.dci.tb.mcs_idx > 28) {
grant.tb = phy->ue_db.get_last_ul_tb(rnti, cc_idx, ul_pid);
Info("RETX: mcs=%d, old_tbs=%d pid=%d\n", grants[i].dci.tb.mcs_idx, grant.tb.tbs, ul_pid);
}
phy->ue_db.set_last_ul_tb(rnti, cc_idx, ul_pid, grant.tb);
// Run PUSCH decoder
pusch_res = {};
ul_cfg.pusch.softbuffers.rx = grants[i].softbuffer_rx;
pusch_res.data = grants[i].data;
if (pusch_res.data) {
if (srslte_enb_ul_get_pusch(&enb_ul, &ul_sf, &ul_cfg.pusch, &pusch_res)) {
Error("Decoding PUSCH\n");
return SRSLTE_ERROR;
}
}
// Compute UL grant
srslte_pusch_grant_t& grant = ul_cfg.pusch.grant;
if (srslte_ra_ul_dci_to_grant(&enb_ul.cell, &ul_sf, &ul_cfg.hopping, &ul_grant.dci, &grant)) {
Error("Computing PUSCH dci for RNTI %x\n", rnti);
return;
}
// Save PHICH scheduling for this user. Each user can have just 1 PUSCH dci per TTI
ue_db[rnti]->phich_grant.n_prb_lowest = grant.n_prb_tilde[0];
ue_db[rnti]->phich_grant.n_dmrs = grants[i].dci.n_dmrs;
uint32_t ul_pid = TTI_RX(ul_sf.tti) % SRSLTE_FDD_NOF_HARQ;
float snr_db = enb_ul.chest_res.snr_db;
// Handle Format0 adaptive retx
// Use last TBS for this TB in case of mcs>28
if (ul_grant.dci.tb.mcs_idx > 28) {
grant.tb = phy->ue_db.get_last_ul_tb(rnti, cc_idx, ul_pid);
Info("RETX: mcs=%d, old_tbs=%d pid=%d\n", ul_grant.dci.tb.mcs_idx, grant.tb.tbs, ul_pid);
}
phy->ue_db.set_last_ul_tb(rnti, cc_idx, ul_pid, grant.tb);
// Run PUSCH decoder
ul_cfg.pusch.softbuffers.rx = ul_grant.softbuffer_rx;
pusch_res.data = ul_grant.data;
if (pusch_res.data) {
if (srslte_enb_ul_get_pusch(&enb_ul, &ul_sf, &ul_cfg.pusch, &pusch_res)) {
Error("Decoding PUSCH for RNTI %x\n", rnti);
return;
}
}
// Save PHICH scheduling for this user. Each user can have just 1 PUSCH dci per TTI
ue_db[rnti]->phich_grant.n_prb_lowest = grant.n_prb_tilde[0];
ue_db[rnti]->phich_grant.n_dmrs = ul_grant.dci.n_dmrs;
float snr_db = enb_ul.chest_res.snr_db;
// Notify MAC of RL status
if (snr_db >= PUSCH_RL_SNR_DB_TH) {
// Notify MAC UL channel quality
phy->stack->snr_info(ul_sf.tti, rnti, cc_idx, snr_db);
if (ul_grant.dci.tb.rv == 0) {
if (!pusch_res.crc) {
Debug("PUSCH: Radio-Link failure snr=%.1f dB\n", snr_db);
phy->stack->rl_failure(rnti);
} else {
phy->stack->rl_ok(rnti);
// Notify MAC of Time Alignment only if it enabled and valid measurement, ignore value otherwise
if (ul_cfg.pusch.meas_ta_en and not std::isnan(enb_ul.chest_res.ta_us) and
not std::isinf(enb_ul.chest_res.ta_us)) {
phy->stack->ta_info(ul_sf.tti, rnti, enb_ul.chest_res.ta_us);
}
}
}
}
// Notify MAC of RL status
if (snr_db >= PUSCH_RL_SNR_DB_TH) {
// Notify MAC UL channel quality
phy->stack->snr_info(ul_sf.tti, rnti, cc_idx, snr_db);
// Send UCI data to MAC
phy->ue_db.send_uci_data(tti_rx, rnti, cc_idx, ul_cfg.pusch.uci_cfg, pusch_res.uci);
if (grants[i].dci.tb.rv == 0) {
if (!pusch_res.crc) {
Debug("PUSCH: Radio-Link failure snr=%.1f dB\n", snr_db);
phy->stack->rl_failure(rnti);
} else {
phy->stack->rl_ok(rnti);
// Save statistics only if data was provided
if (ul_grant.data != nullptr) {
// Save metrics stats
ue_db[rnti]->metrics_ul(ul_grant.dci.tb.mcs_idx, 0, enb_ul.chest_res.snr_db, pusch_res.avg_iterations_block);
}
}
// Notify MAC of Time Alignment only if it enabled and valid measurement, ignore value otherwise
if (ul_cfg.pusch.meas_ta_en and not std::isnan(enb_ul.chest_res.ta_us) and
not std::isinf(enb_ul.chest_res.ta_us)) {
phy->stack->ta_info(ul_sf.tti, rnti, enb_ul.chest_res.ta_us);
}
}
}
}
void cc_worker::decode_pusch(stack_interface_phy_lte::ul_sched_grant_t* grants, uint32_t nof_pusch)
{
// Iterate over all the grants, all the grants need to report MAC the CRC status
for (uint32_t i = 0; i < nof_pusch; i++) {
// Get grant itself and RNTI
stack_interface_phy_lte::ul_sched_grant_t& ul_grant = grants[i];
uint16_t rnti = ul_grant.dci.rnti;
// Send UCI data to MAC
phy->ue_db.send_uci_data(tti_rx, rnti, cc_idx, ul_cfg.pusch.uci_cfg, pusch_res.uci);
srslte_pusch_res_t pusch_res = {};
srslte_ul_cfg_t ul_cfg = {};
// Notify MAC new received data and HARQ Indication value
if (pusch_res.data) {
phy->stack->crc_info(tti_rx, rnti, cc_idx, grant.tb.tbs / 8, pusch_res.crc);
// Decodes PUSCH for the given grant
decode_pusch_rnti(ul_grant, ul_cfg, pusch_res);
// Save metrics stats
ue_db[rnti]->metrics_ul(grants[i].dci.tb.mcs_idx, 0, snr_db, pusch_res.avg_iterations_block);
// Notify MAC new received data and HARQ Indication value
if (ul_grant.data != nullptr) {
// Inform MAC about the CRC result
phy->stack->crc_info(tti_rx, rnti, cc_idx, ul_cfg.pusch.grant.tb.tbs / 8, pusch_res.crc);
// Logging
if (log_h->get_level() >= srslte::LOG_LEVEL_INFO) {
char str[512];
srslte_pusch_rx_info(&ul_cfg.pusch, &pusch_res, &enb_ul.chest_res, str, sizeof(str));
log_h->info("PUSCH: cc=%d, %s\n", cc_idx, str);
}
// Logging
if (log_h->get_level() >= srslte::LOG_LEVEL_INFO) {
char str[512];
srslte_pusch_rx_info(&ul_cfg.pusch, &pusch_res, &enb_ul.chest_res, str, sizeof(str));
log_h->info("PUSCH: cc=%d, %s\n", cc_idx, str);
}
}
}
return SRSLTE_SUCCESS;
}
int cc_worker::decode_pucch()

Write Preview
Loading…
Cancel
Save