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ue,rrc: refactor PHY parameter derivation for SA

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* expose carrier/SSB config in RRC args
* provide hard-coded values until exposed as param
* remove coreless option
master
Andre Puschmann 3 years ago
parent 10aabe8763
commit 71f48ee7f2
6 changed files with 84 additions and 134 deletions
Show Stats Download Patch File Download Diff File

1
srsue/hdr/stack/rrc_nr/rrc_nr.h
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@ -61,7 +61,6 @@ public:
const rrc_nr_args_t& args_);
void stop();
void init_core_less();
void get_metrics(rrc_nr_metrics_t& m);

14
srsue/hdr/stack/rrc_nr/rrc_nr_config.h
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@ -18,19 +18,19 @@
namespace srsue {
// Expert arguments to create GW without proper RRC
struct core_less_args_t {
std::string ip_addr;
uint8_t drb_lcid;
};
struct rrc_nr_args_t {
core_less_args_t coreless;
bool sa_mode;
uint32_t sim_nr_meas_pci;
bool pdcp_short_sn_support;
std::string supported_bands_nr_str;
std::vector<uint32_t> supported_bands_nr;
std::vector<uint32_t> supported_bands_eutra;
uint32_t dl_nr_arfcn;
uint32_t ssb_nr_arfcn;
uint32_t nof_prb;
uint32_t pci;
srsran_subcarrier_spacing_t scs;
srsran_subcarrier_spacing_t ssb_scs;
std::string log_level;
uint32_t log_hex_limit;
};

140
srsue/src/stack/rrc_nr/rrc_nr.cc
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@ -70,8 +70,34 @@ int rrc_nr::init(phy_interface_rrc_nr* phy_,
t310 = task_sched.get_unique_timer();
t311 = task_sched.get_unique_timer();
if (args.sa_mode) {
plmn_is_selected = true; // short-cut SA test
// for SA mode setup inital HARQ config and SRB0
srsran::dl_harq_cfg_nr_t harq_cfg = {};
harq_cfg.nof_procs = 8;
mac->set_config(harq_cfg);
// Setup SRB0
logical_channel_config_t lch = {};
mac->setup_lcid(lch);
// Carrier config
srsran::srsran_band_helper bands;
phy_cfg.carrier.dl_center_frequency_hz = bands.nr_arfcn_to_freq(args.dl_nr_arfcn);
phy_cfg.carrier.ssb_center_freq_hz = bands.nr_arfcn_to_freq(args.ssb_nr_arfcn);
phy_cfg.carrier.nof_prb = args.nof_prb;
phy_cfg.carrier.max_mimo_layers = 1;
phy_cfg.carrier.pci = args.pci;
phy_cfg.carrier.scs = args.scs;
phy_cfg.duplex.mode = bands.get_duplex_mode(bands.get_band_from_dl_arfcn(args.dl_nr_arfcn));
// SSB configuration
phy_cfg.ssb.periodicity_ms = 10;
phy_cfg.ssb.position_in_burst[0] = true;
phy_cfg.ssb.scs = args.ssb_scs;
}
running = true;
sim_measurement_timer = task_sched.get_unique_timer();
return SRSRAN_SUCCESS;
@ -82,26 +108,6 @@ void rrc_nr::stop()
running = false;
}
void rrc_nr::init_core_less()
{
logger.info("Creating dummy DRB on LCID=%d", args.coreless.drb_lcid);
srsran::rlc_config_t rlc_cnfg = srsran::rlc_config_t::default_rlc_um_nr_config(6);
rlc->add_bearer(args.coreless.drb_lcid, rlc_cnfg);
srsran::pdcp_config_t pdcp_cnfg{args.coreless.drb_lcid,
srsran::PDCP_RB_IS_DRB,
srsran::SECURITY_DIRECTION_DOWNLINK,
srsran::SECURITY_DIRECTION_UPLINK,
srsran::PDCP_SN_LEN_18,
srsran::pdcp_t_reordering_t::ms500,
srsran::pdcp_discard_timer_t::ms100,
false,
srsran_rat_t::nr};
pdcp->add_bearer(args.coreless.drb_lcid, pdcp_cnfg);
return;
}
void rrc_nr::get_metrics(rrc_nr_metrics_t& m)
{
m.state = state;
@ -223,7 +229,6 @@ void rrc_nr::run_tti(uint32_t tti) {}
// PDCP interface
void rrc_nr::write_pdu(uint32_t lcid, srsran::unique_byte_buffer_t pdu)
{
printf("RRC received PDU\n");
logger.debug("RX PDU, LCID: %d", lcid);
switch (static_cast<nr_srb>(lcid)) {
case nr_srb::srb0:
@ -317,7 +322,7 @@ void rrc_nr::decode_dl_dcch(uint32_t lcid, unique_byte_buffer_t pdu)
break;
}
default:
logger.error("The provided DL-DCCH message type is not recognized or supported");
logger.error("The provided DL-DCCH message type is not recognized or supported.");
break;
}
}
@ -352,12 +357,9 @@ void rrc_nr::decode_pdu_bcch_dlsch(srsran::unique_byte_buffer_t pdu)
void rrc_nr::handle_sib1(const sib1_s& sib1)
{
logger.info("SIB1 received, CellID=%d", meas_cells.serving_cell().get_cell_id() & 0xfff);
meas_cells.serving_cell().set_sib1(sib1);
// TODO: config basic config and remove early exit
return;
logger.info("SIB1 received, CellID=%d", meas_cells.serving_cell().get_cell_id() & 0xfff);
// clang-format off
// unhandled fields:
@ -466,94 +468,11 @@ int rrc_nr::write_sdu(srsran::unique_byte_buffer_t sdu)
bool rrc_nr::is_connected()
{
return false;
return state == RRC_NR_STATE_CONNECTED;
}
int rrc_nr::connection_request(srsran::nr_establishment_cause_t cause, srsran::unique_byte_buffer_t dedicated_info_nas_)
{
// TODO:
// Assume cell has been found and SSB with MIB has been decoded
srsran::phy_cfg_nr_default_t::reference_cfg_t cfg = {};
cfg.carrier = srsran::phy_cfg_nr_default_t::reference_cfg_t::R_CARRIER_CUSTOM_10MHZ;
cfg.duplex = srsran::phy_cfg_nr_default_t::reference_cfg_t::R_DUPLEX_FDD;
phy_cfg = srsran::phy_cfg_nr_default_t{srsran::phy_cfg_nr_default_t::reference_cfg_t{cfg}};
// Carrier configuration
phy_cfg.ssb.periodicity_ms = 10;
phy_cfg.carrier.ssb_center_freq_hz = 1842.05e6;
phy_cfg.carrier.dl_center_frequency_hz = 1842.5e6;
phy_cfg.carrier.ul_center_frequency_hz = 1747.5e6;
// PRACH configuration
phy_cfg.prach.num_ra_preambles = 8;
phy_cfg.prach.config_idx = 0;
phy_cfg.prach.root_seq_idx = 1;
phy_cfg.prach.zero_corr_zone = 0;
phy_cfg.prach.is_nr = true;
phy_cfg.prach.freq_offset = 1;
srsran::rach_cfg_nr_t rach_cfg = {};
rach_cfg.prach_ConfigurationIndex = 0;
rach_cfg.preambleTransMax = 7;
rach_cfg.ra_responseWindow = 10;
rach_cfg.ra_ContentionResolutionTimer = 64;
mac->set_config(rach_cfg);
srsran::dl_harq_cfg_nr_t harq_cfg = {};
harq_cfg.nof_procs = 8;
mac->set_config(harq_cfg);
// Setup SRB0
logical_channel_config_t lch = {};
mac->setup_lcid(lch);
// Coreset0 configuration
// Get pointA and SSB absolute frequencies
double pointA_abs_freq_Hz = phy_cfg.carrier.dl_center_frequency_hz -
phy_cfg.carrier.nof_prb * SRSRAN_NRE * SRSRAN_SUBC_SPACING_NR(phy_cfg.carrier.scs) / 2;
double ssb_abs_freq_Hz = phy_cfg.carrier.ssb_center_freq_hz;
// Calculate integer SSB to pointA frequency offset in Hz
uint32_t ssb_pointA_freq_offset_Hz =
(ssb_abs_freq_Hz > pointA_abs_freq_Hz) ? (uint32_t)(ssb_abs_freq_Hz - pointA_abs_freq_Hz) : 0;
if (srsran_coreset_zero(phy_cfg.carrier.pci,
ssb_pointA_freq_offset_Hz,
phy_cfg.ssb.scs,
phy_cfg.carrier.scs,
6,
&phy_cfg.pdcch.coreset[0])) {
fprintf(stderr, "Error generating coreset0\n");
}
phy_cfg.pdcch.coreset_present[0] = true;
// RAR SS
phy_cfg.pdcch.ra_search_space_present = true;
phy_cfg.pdcch.ra_search_space.coreset_id = 0;
phy_cfg.pdcch.ra_search_space.duration = 1;
phy_cfg.pdcch.ra_search_space.type = srsran_search_space_type_common_1;
phy_cfg.pdcch.ra_search_space.nof_formats = 1;
phy_cfg.pdcch.ra_search_space.formats[1] = srsran_dci_format_nr_1_0;
phy_cfg.pdcch.ra_search_space.nof_candidates[0] = 0;
phy_cfg.pdcch.ra_search_space.nof_candidates[1] = 0;
phy_cfg.pdcch.ra_search_space.nof_candidates[2] = 1;
phy_cfg.pdcch.ra_search_space.nof_candidates[3] = 0;
phy_cfg.pdcch.ra_search_space.nof_candidates[4] = 0;
// common1 SS
phy_cfg.pdcch.search_space_present[0] = true;
phy_cfg.pdcch.search_space[0].coreset_id = 0;
phy_cfg.pdcch.search_space[0].duration = 1;
phy_cfg.pdcch.search_space[0].nof_candidates[0] = 0;
phy_cfg.pdcch.search_space[0].nof_candidates[1] = 0;
phy_cfg.pdcch.search_space[0].nof_candidates[2] = 1;
phy_cfg.pdcch.search_space[0].nof_candidates[3] = 0;
phy_cfg.pdcch.search_space[0].nof_candidates[4] = 0;
phy_cfg.pdcch.search_space[0].type = srsran_search_space_type_common_1;
phy_cfg.pdcch.search_space[0].nof_formats = 2;
phy_cfg.pdcch.search_space[0].formats[0] = srsran_dci_format_nr_0_0;
phy_cfg.pdcch.search_space[0].formats[1] = srsran_dci_format_nr_1_0;
phy_cfg.pdcch.search_space_present[1] = false;
if (not setup_req_proc.launch(cause, std::move(dedicated_info_nas_))) {
logger.error("Failed to initiate setup request procedure");
return SRSRAN_ERROR;
@ -1336,7 +1255,6 @@ bool rrc_nr::apply_dl_common_cfg(const asn1::rrc_nr::dl_cfg_common_s& dl_cfg_com
}
if (pdcch_cfg_common.ra_search_space_present) {
if (phy_cfg.pdcch.search_space_present[pdcch_cfg_common.ra_search_space] == true) {
// phy_cfg.pdcch.ra_rnti = 0x16; //< Supposed to be deduced from PRACH configuration
phy_cfg.pdcch.ra_search_space = phy_cfg.pdcch.search_space[pdcch_cfg_common.ra_search_space];
phy_cfg.pdcch.ra_search_space_present = true;
phy_cfg.pdcch.ra_search_space.type = srsran_search_space_type_common_1;

24
srsue/src/stack/rrc_nr/rrc_nr_procedures.cc
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@ -429,6 +429,30 @@ rrc_nr::cell_selection_proc::handle_cell_search_result(const rrc_interface_phy_n
// until cell selection is done, update PHY config to take the last found PCI
rrc_handle.phy_cfg.carrier.pci = result.pci;
{
// Coreset0 configuration
srsran::phy_cfg_nr_t& phy_cfg = rrc_handle.phy_cfg;
// Get pointA and SSB absolute frequencies
double pointA_abs_freq_Hz =
phy_cfg.carrier.dl_center_frequency_hz -
phy_cfg.carrier.nof_prb * SRSRAN_NRE * SRSRAN_SUBC_SPACING_NR(phy_cfg.carrier.scs) / 2;
double ssb_abs_freq_Hz = phy_cfg.carrier.ssb_center_freq_hz;
// Calculate integer SSB to pointA frequency offset in Hz
uint32_t ssb_pointA_freq_offset_Hz =
(ssb_abs_freq_Hz > pointA_abs_freq_Hz) ? (uint32_t)(ssb_abs_freq_Hz - pointA_abs_freq_Hz) : 0;
if (srsran_coreset_zero(phy_cfg.carrier.pci,
ssb_pointA_freq_offset_Hz,
phy_cfg.ssb.scs,
phy_cfg.carrier.scs,
6,
&phy_cfg.pdcch.coreset[0])) {
fprintf(stderr, "Error generating coreset0\n");
}
phy_cfg.pdcch.coreset_present[0] = true;
}
// Until SI acquisition is implemented, provide hard-coded SIB for now
uint8_t msg[] = {0x74, 0x81, 0x01, 0x70, 0x10, 0x40, 0x04, 0x02, 0x00, 0x00, 0x0e, 0x00, 0x00, 0x33, 0x60, 0x38,
0x05, 0x01, 0x00, 0x40, 0x1a, 0x00, 0x00, 0x06, 0x6c, 0x6d, 0x92, 0x21, 0xf3, 0x70, 0x40, 0x20,

3
srsue/src/stack/ue_stack_nr.cc
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@ -76,8 +76,6 @@ int ue_stack_nr::init(const stack_args_t& args_)
rrc_nr_args_t rrc_args = {};
rrc_args.log_level = args.log.rrc_level;
rrc_args.log_hex_limit = args.log.rrc_hex_limit;
rrc_args.coreless.drb_lcid = 4;
rrc_args.coreless.ip_addr = "192.168.1.3";
rrc->init(phy,
mac.get(),
rlc.get(),
@ -89,7 +87,6 @@ int ue_stack_nr::init(const stack_args_t& args_)
task_sched.get_timer_handler(),
this,
rrc_args);
rrc->init_core_less();
running = true;
start(STACK_MAIN_THREAD_PRIO);

12
srsue/src/ue.cc
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@ -276,10 +276,22 @@ int ue::parse_args(const all_args_t& args_)
return SRSRAN_ERROR;
}
// SA params
if (args.phy.nof_lte_carriers == 0 && args.phy.nof_nr_carriers == 1) {
args.stack.rrc_nr.sa_mode = true;
// TODO: expose to UE config
args.stack.rrc_nr.dl_nr_arfcn = 368500;
args.stack.rrc_nr.ssb_nr_arfcn = 368410;
args.stack.rrc_nr.nof_prb = 52;
args.stack.rrc_nr.pci = 500;
args.stack.rrc_nr.scs = srsran_subcarrier_spacing_15kHz;
args.stack.rrc_nr.ssb_scs = srsran_subcarrier_spacing_15kHz;
// Update NAS-5G args
args.stack.nas_5g.ia5g = args.stack.nas.eia;
args.stack.nas_5g.ea5g = args.stack.nas.eea;
args.stack.nas_5g.pdu_session_cfgs.push_back({args.stack.nas.apn_name});
}
return SRSRAN_SUCCESS;
}

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