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SRSUE: Interface stack and PHY for NR-RA procedure

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master
Xavier Arteaga 4 years ago committed by David Rupprecht
parent 9a6512f4e8
commit 760ad3a746
6 changed files with 59 additions and 33 deletions
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13
lib/include/srslte/interfaces/ue_nr_interfaces.h
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@ -49,8 +49,12 @@ public:
virtual int sf_indication(const uint32_t tti) = 0; ///< FIXME: rename to slot indication
// Query the MAC for the current RNTI to look for
virtual uint16_t get_dl_sched_rnti(const uint32_t tti) = 0;
virtual uint16_t get_ul_sched_rnti(const uint32_t tti) = 0;
struct sched_rnti_t {
uint16_t id;
srslte_rnti_type_t type;
};
virtual sched_rnti_t get_dl_sched_rnti_nr(const uint32_t tti) = 0;
virtual sched_rnti_t get_ul_sched_rnti_nr(const uint32_t tti) = 0;
/// Indicate succussfully received TB to MAC. The TB buffer is allocated in the PHY and handed as unique_ptr to MAC
virtual void tb_decoded(const uint32_t cc_idx, mac_nr_grant_dl_t& grant) = 0;
@ -126,7 +130,10 @@ public:
virtual int tx_request(const tx_request_t& request) = 0;
/// Instruct PHY to send PRACH in the next occasion.
virtual void send_prach(const uint32_t prach_occasion, const int preamble_index, const float preamble_received_target_power, const float ta_base_sec = 0.0f) = 0;
virtual void send_prach(const uint32_t prach_occasion,
const int preamble_index,
const float preamble_received_target_power,
const float ta_base_sec = 0.0f) = 0;
};
class phy_interface_rrc_nr

4
srsue/hdr/stack/mac_nr/mac_nr.h
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@ -47,8 +47,8 @@ public:
void bch_decoded_ok(uint32_t tti, srslte::unique_byte_buffer_t payload);
/// Interface for PHY
uint16_t get_dl_sched_rnti(const uint32_t tti);
uint16_t get_ul_sched_rnti(const uint32_t tti);
sched_rnti_t get_dl_sched_rnti_nr(const uint32_t tti);
sched_rnti_t get_ul_sched_rnti_nr(const uint32_t tti);
int sf_indication(const uint32_t tti);
void tb_decoded(const uint32_t cc_idx, mac_nr_grant_dl_t& grant);

3
srsue/hdr/stack/ue_stack_lte.h
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@ -88,6 +88,9 @@ public:
uint16_t get_dl_sched_rnti(uint32_t tti) final { return mac.get_dl_sched_rnti(tti); }
uint16_t get_ul_sched_rnti(uint32_t tti) final { return mac.get_ul_sched_rnti(tti); }
sched_rnti_t get_dl_sched_rnti_nr(uint32_t tti) final { return mac_nr.get_dl_sched_rnti_nr(tti); }
sched_rnti_t get_ul_sched_rnti_nr(uint32_t tti) final { return mac_nr.get_ul_sched_rnti_nr(tti); }
void new_grant_ul(uint32_t cc_idx, mac_grant_ul_t grant, tb_action_ul_t* action) final
{
mac.new_grant_ul(cc_idx, grant, action);

6
srsue/hdr/stack/ue_stack_nr.h
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@ -74,9 +74,9 @@ public:
void run_tti(uint32_t tti) final;
// MAC interface for PHY
uint16_t get_dl_sched_rnti(const uint32_t tti) { return mac->get_dl_sched_rnti(tti); }
uint16_t get_ul_sched_rnti(const uint32_t tti) { return mac->get_ul_sched_rnti(tti); }
int sf_indication(const uint32_t tti)
sched_rnti_t get_dl_sched_rnti_nr(const uint32_t tti) final { return mac->get_dl_sched_rnti_nr(tti); }
sched_rnti_t get_ul_sched_rnti_nr(const uint32_t tti) final { return mac->get_ul_sched_rnti_nr(tti); }
int sf_indication(const uint32_t tti)
{
run_tti(tti);
return SRSLTE_SUCCESS;

41
srsue/src/phy/nr/cc_worker.cc
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@ -129,11 +129,16 @@ uint32_t cc_worker::get_buffer_len()
void cc_worker::decode_pdcch_dl()
{
std::array<srslte_dci_dl_nr_t, SRSLTE_SEARCH_SPACE_MAX_NOF_CANDIDATES_NR> dci_rx = {};
uint16_t rnti = phy->stack->get_dl_sched_rnti(dl_slot_cfg.idx);
srsue::mac_interface_phy_nr::sched_rnti_t rnti = phy->stack->get_dl_sched_rnti_nr(dl_slot_cfg.idx);
// Skip search if no valid RNTI is given
if (rnti.id == SRSLTE_INVALID_RNTI) {
return;
}
// Search for grants
int n_dl = srslte_ue_dl_nr_find_dl_dci(
&ue_dl, &dl_slot_cfg, rnti, srslte_rnti_type_c, dci_rx.data(), (uint32_t)dci_rx.size());
int n_dl =
srslte_ue_dl_nr_find_dl_dci(&ue_dl, &dl_slot_cfg, rnti.id, rnti.type, dci_rx.data(), (uint32_t)dci_rx.size());
if (n_dl < SRSLTE_SUCCESS) {
logger.error("Error decoding DL NR-PDCCH");
return;
@ -156,11 +161,16 @@ void cc_worker::decode_pdcch_dl()
void cc_worker::decode_pdcch_ul()
{
std::array<srslte_dci_ul_nr_t, SRSLTE_SEARCH_SPACE_MAX_NOF_CANDIDATES_NR> dci_rx = {};
uint16_t rnti = phy->stack->get_ul_sched_rnti(ul_slot_cfg.idx);
srsue::mac_interface_phy_nr::sched_rnti_t rnti = phy->stack->get_ul_sched_rnti_nr(ul_slot_cfg.idx);
// Skip search if no valid RNTI is given
if (rnti.id == SRSLTE_INVALID_RNTI) {
return;
}
// Search for grants
int n_dl = srslte_ue_dl_nr_find_ul_dci(
&ue_dl, &dl_slot_cfg, rnti, srslte_rnti_type_c, dci_rx.data(), (uint32_t)dci_rx.size());
int n_dl =
srslte_ue_dl_nr_find_ul_dci(&ue_dl, &dl_slot_cfg, rnti.id, rnti.type, dci_rx.data(), (uint32_t)dci_rx.size());
if (n_dl < SRSLTE_SUCCESS) {
logger.error("Error decoding UL NR-PDCCH");
return;
@ -206,7 +216,7 @@ bool cc_worker::work_dl()
// Initialise PDSCH Result
std::array<srslte_pdsch_res_nr_t, SRSLTE_MAX_CODEWORDS> pdsch_res = {};
pdsch_res[0].payload = data->buffer;
pdsch_res[0].payload = data->msg;
pdsch_cfg.grant.tb[0].softbuffer.rx = &softbuffer_rx;
// Decode actual PDSCH transmission
@ -236,6 +246,10 @@ bool cc_worker::work_dl()
mac_nr_grant.rnti = pdsch_cfg.grant.rnti;
mac_nr_grant.tti = dl_slot_cfg.idx;
if (pdsch_cfg.grant.rnti_type == srslte_rnti_type_ra) {
phy->rar_grant_tti = dl_slot_cfg.idx;
}
// Send data to MAC
phy->stack->tb_decoded(cc_idx, mac_nr_grant);
}
@ -273,14 +287,17 @@ bool cc_worker::work_ul()
mac_ul_grant.rnti = pusch_cfg.grant.rnti;
mac_ul_grant.tti = ul_slot_cfg.idx;
mac_ul_grant.tbs = pusch_cfg.grant.tb[0].tbs;
phy->stack->new_grant_ul(0, mac_ul_grant);
srslte::unique_byte_buffer_t tx_pdu = srslte::make_byte_buffer();
phy->stack->new_grant_ul(0, mac_ul_grant, tx_pdu.get());
// Provisional reset and assign Tx softbuffer
srslte_softbuffer_tx_reset(&softbuffer_tx);
pusch_cfg.grant.tb[0].softbuffer.tx = &softbuffer_tx;
// TODO: Use here PDU, after that, remove tx_data attribute
uint8_t* tx_data_ptr = tx_pdu.get()->msg;
// Encode PUSCH transmission
if (srslte_ue_ul_nr_encode_pusch(&ue_ul, &ul_slot_cfg, &pusch_cfg, tx_data.data()) < SRSLTE_SUCCESS) {
if (srslte_ue_ul_nr_encode_pusch(&ue_ul, &ul_slot_cfg, &pusch_cfg, tx_data_ptr) < SRSLTE_SUCCESS) {
ERROR("Encoding PUSCH");
return false;
}
@ -289,9 +306,9 @@ bool cc_worker::work_ul()
if (logger.info.enabled()) {
std::array<char, 512> str;
srslte_ue_ul_nr_pusch_info(&ue_ul, &pusch_cfg, str.data(), str.size());
logger.info(tx_data.data(),
logger.info(tx_data_ptr,
pusch_cfg.grant.tb[0].tbs / 8,
"PUSCH: cc=%d, %s, tti_tx=%d",
"PUSCH (NR): cc=%d, %s, tti_tx=%d",
cc_idx,
str.data(),
ul_slot_cfg.idx);

25
srsue/src/stack/mac_nr/mac_nr.cc
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@ -73,9 +73,9 @@ void mac_nr::run_tti(const uint32_t tti)
logger.debug("Running MAC tti=%d", tti);
}
uint16_t mac_nr::get_ul_sched_rnti(const uint32_t tti)
mac_interface_phy_nr::sched_rnti_t mac_nr::get_ul_sched_rnti_nr(const uint32_t tti)
{
return c_rnti;
return {c_rnti, srslte_rnti_type_c};
}
bool mac_nr::is_si_opportunity()
@ -89,34 +89,33 @@ bool mac_nr::is_paging_opportunity()
return false;
}
uint16_t mac_nr::get_dl_sched_rnti(const uint32_t tti)
mac_interface_phy_nr::sched_rnti_t mac_nr::get_dl_sched_rnti_nr(const uint32_t tti)
{
// Priority: SI-RNTI, P-RNTI, RA-RNTI, Temp-RNTI, CRNTI
if (is_si_opportunity()) {
return SRSLTE_SIRNTI;
return {SRSLTE_SIRNTI, srslte_rnti_type_si};
}
if (is_paging_opportunity()) {
return SRSLTE_PRNTI;
return {SRSLTE_PRNTI, srslte_rnti_type_si};
}
// TODO: add new RA proc shortly
#if 0
if (proc_ra->is_rar_opportunity()) {
return proc_ra->get_rar_rnti();
if (proc_ra.is_rar_opportunity(tti)) {
return {proc_ra.get_rar_rnti(), srslte_rnti_type_ra};
}
if (proc_ra->has_temp_rnti() && has_crnti() == false) {
#if 0
if (proc_ra.has_temp_rnti() && has_crnti() == false) {
return proc_ra->get_temp_rnti();
}
#endif
if (has_crnti()) {
return get_crnti();
return {get_crnti(), srslte_rnti_type_c};
}
// turn off DCI search for this TTI
return SRSLTE_INVALID_RNTI;
return {SRSLTE_INVALID_RNTI, srslte_rnti_type_c};
}
bool mac_nr::has_crnti()
@ -151,7 +150,7 @@ void mac_nr::prach_sent(const uint32_t tti,
const uint32_t f_id,
const uint32_t ul_carrier_id)
{
// TODO: indicate to RA proc
proc_ra.prach_sent(tti, s_id, t_id, f_id, ul_carrier_id);
}
// This function handles all PCAP writing for a decoded DL TB

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