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Added more NR band related helpers

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master
Xavier Arteaga 4 years ago committed by Xavier Arteaga
parent 758fd3c1ba
commit 7450232b3e
3 changed files with 185 additions and 2 deletions
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116
lib/include/srsran/common/band_helper.h
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@ -13,6 +13,7 @@
#ifndef SRSRAN_BAND_HELPER_H
#define SRSRAN_BAND_HELPER_H
#include "srsran/phy/common/phy_common_nr.h"
#include <array>
#include <stdint.h>
#include <vector>
@ -44,8 +45,77 @@ public:
// For bands with 2 possible raster offsets, delta_f_raster needs to be specified
std::vector<uint32_t> get_bands_nr(uint32_t nr_arfcn, delta_f_raster_t delta_f_raster = DEFAULT);
/**
* @brief Get the lowest band that includes a given Downlink frequency in Hz
* @param dl_freq_Hz Given frequency in Hz
* @return The band number if the frequency is bounded in a band, UINT16_MAX otherwise
*/
uint16_t get_band_from_dl_freq_Hz(double dl_freq_Hz);
/**
* @brief Selects the SSB pattern case according to the band number and subcarrier spacing
* @remark Described by TS 38.101-1 Table 5.4.3.3-1: Applicable SS raster entries per operating band
* @param band NR Band number
* @param scs SSB Subcarrier spacing
* @return The SSB pattern case if band and subcarrier spacing match, SRSRAN_SSB_PATTERN_INVALID otherwise
*/
srsran_ssb_patern_t get_ssb_pattern(uint16_t band, srsran_subcarrier_spacing_t scs);
/**
* @brief gets the NR band duplex mode
* @param band Given band
* @return A valid SRSRAN_DUPLEX_MODE if the band is valid, SRSRAN_DUPLEX_MODE_INVALID otherwise
*/
srsran_duplex_mode_t get_duplex_mode(uint16_t band);
private:
// Table 5.4.2.1-1
// Elements of TS 38.101-1 Table 5.2-1: NR operating bands in FR1
struct nr_operating_band {
uint16_t band;
uint32_t F_UL_low; // in MHz
uint32_t F_UL_high; // in MHz
uint32_t F_DL_low; // in MHz
uint32_t F_DL_high; // in MHz
srsran_duplex_mode_t duplex_mode;
};
static const uint32_t nof_nr_operating_band_fr1 = 32;
static constexpr std::array<nr_operating_band, nof_nr_operating_band_fr1> nr_operating_bands_fr1 = {{
// clang-format off
{1, 1920, 1080, 2110, 2170, SRSRAN_DUPLEX_MODE_FDD},
{2, 1850, 1810, 1930, 1990, SRSRAN_DUPLEX_MODE_FDD},
{3, 1710, 1785, 1805, 1880, SRSRAN_DUPLEX_MODE_FDD},
{5, 824, 849, 869, 894, SRSRAN_DUPLEX_MODE_FDD},
{7, 2500, 2570, 2620, 2690, SRSRAN_DUPLEX_MODE_FDD},
{8, 880, 915, 925, 960, SRSRAN_DUPLEX_MODE_FDD},
{12, 699, 716, 729, 746, SRSRAN_DUPLEX_MODE_FDD},
{20, 832, 862, 791, 821, SRSRAN_DUPLEX_MODE_FDD},
{25, 1850, 1915, 1930, 1995, SRSRAN_DUPLEX_MODE_FDD},
{28, 703, 748, 758, 803, SRSRAN_DUPLEX_MODE_FDD},
{34, 2010, 2025, 2010, 2025, SRSRAN_DUPLEX_MODE_TDD},
{38, 2570, 2620, 2570, 2620, SRSRAN_DUPLEX_MODE_TDD},
{39, 1880, 1920, 1880, 1920, SRSRAN_DUPLEX_MODE_TDD},
{40, 2300, 2400, 2300, 2400, SRSRAN_DUPLEX_MODE_TDD},
{41, 2496, 2690, 2496, 2690, SRSRAN_DUPLEX_MODE_TDD},
{50, 1432, 1517, 1432, 1517, SRSRAN_DUPLEX_MODE_TDD},
{51, 1427, 1432, 1427, 1432, SRSRAN_DUPLEX_MODE_TDD},
{66, 1710, 1780, 2110, 2200, SRSRAN_DUPLEX_MODE_FDD},
{70, 1695, 1710, 1995, 2020, SRSRAN_DUPLEX_MODE_FDD},
{71, 663, 698, 617, 652, SRSRAN_DUPLEX_MODE_FDD},
{74, 1427, 1470, 1475, 1518, SRSRAN_DUPLEX_MODE_FDD},
{75, 0, 0, 1432, 1517, SRSRAN_DUPLEX_MODE_SDL},
{76, 0, 0, 1427, 1432, SRSRAN_DUPLEX_MODE_SDL},
{77, 3300, 4200, 3300, 4200, SRSRAN_DUPLEX_MODE_TDD},
{78, 3300, 3800, 3300, 3800, SRSRAN_DUPLEX_MODE_TDD},
{79, 4400, 5000, 4400, 5000, SRSRAN_DUPLEX_MODE_TDD},
{80, 1710, 1785, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
{81, 880, 915, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
{82, 832, 862, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
{83, 703, 748, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
{84, 1920, 1980, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
{86, 1710, 1780, 0, 0, SRSRAN_DUPLEX_MODE_SUL}
// clang-format on
}};
struct nr_raster_params {
double delta_F_global_kHz;
double F_REF_Offs_MHz;
@ -140,7 +210,7 @@ private:
// clang-format on
}};
static const uint32_t nof_nr_bands_fr2 = 36;
static const uint32_t nof_nr_bands_fr2 = 8;
static constexpr std::array<nr_band, nof_nr_bands_fr2> nr_band_table_fr2 = {{
{257, KHZ_60, 2054166, 1, 2104165, 2054166, 1, 2104165},
{257, KHZ_120, 2054167, 2, 2104165, 2054167, 20, 2104165},
@ -154,6 +224,48 @@ private:
{261, KHZ_60, 2070833, 1, 2084999, 2070833, 1, 2084999},
{261, KHZ_120, 2070833, 2, 2084999, 2070833, 2, 2084999}
}};
// Elements of TS 38.101-1 Table 5.4.3.3-1 : Applicable SS raster entries per operating band
struct nr_band_ss_raster {
uint16_t band;
srsran_subcarrier_spacing_t scs;
srsran_ssb_patern_t pattern;
uint32_t gscn_first;
uint32_t gscn_step;
uint32_t gscn_last;
};
static const uint32_t nof_nr_band_ss_raster = 29;
static constexpr std::array<nr_band_ss_raster, nof_nr_band_ss_raster> nr_band_ss_raster_table = {{
{1, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5419},
{2, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4969},
{3, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4517, 1, 4693},
{5, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2177, 1, 2230},
{5, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 2183, 1, 2224},
{7, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6554, 1, 6718},
{8, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2318, 1, 2395},
{12, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1828, 1, 1858},
{20, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1982, 1, 2047},
{25, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4981},
{28, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1901, 1, 2002},
{34, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5030, 1, 5056},
{38, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6431, 1, 6544},
{39, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4706, 1, 4795},
{40, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5756, 1, 5995},
{41, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6246, 3, 6717},
{41, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 6252, 3, 6714},
{50, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
{51, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
{66, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5494},
{66, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 5285, 1, 5488},
{70, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4993, 1, 5044},
{71, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1547, 1, 1624},
{74, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3692, 1, 3790},
{75, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
{76, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
{77, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8329},
{78, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8051},
{79, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 8480, 16, 8880},
}};
};
} // namespace srsran

18
lib/include/srsran/phy/common/phy_common_nr.h
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@ -328,8 +328,26 @@ typedef enum SRSRAN_API {
srsran_subcarrier_spacing_60kHz,
srsran_subcarrier_spacing_120kHz,
srsran_subcarrier_spacing_240kHz,
srsran_subcarrier_spacing_invalid
} srsran_subcarrier_spacing_t;
typedef enum SRSRAN_API {
SRSRAN_SSB_PATTERN_A = 0, // FR1, 15 kHz SCS
SRSRAN_SSB_PATTERN_B, // FR1, 30 kHz SCS
SRSRAN_SSB_PATTERN_C, // FR1, 30 kHz SCS
SRSRAN_SSB_PATTERN_D, // FR2, 120 kHz SCS
SRSRAN_SSB_PATTERN_E, // FR2, 240 kHz SCS
SRSRAN_SSB_PATTERN_INVALID,
} srsran_ssb_patern_t;
typedef enum SRSRAN_API {
SRSRAN_DUPLEX_MODE_FDD = 0, // Paired
SRSRAN_DUPLEX_MODE_TDD, // Unpaired
SRSRAN_DUPLEX_MODE_SDL, // Supplementary DownLink
SRSRAN_DUPLEX_MODE_SUL, // Supplementary UpLink
SRSRAN_DUPLEX_MODE_INVALID
} srsran_duplex_mode_t;
/**
* @brief NR carrier parameters. It is a combination of fixed cell and bandwidth-part (BWP)
*/

53
lib/src/common/band_helper.cc
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@ -19,6 +19,10 @@ namespace srsran {
constexpr std::array<srsran_band_helper::nr_band, srsran_band_helper::nof_nr_bands_fr1>
srsran_band_helper::nr_band_table_fr1;
constexpr std::array<srsran_band_helper::nr_raster_params, 3> srsran_band_helper::nr_fr_params;
constexpr std::array<srsran_band_helper::nr_operating_band, srsran_band_helper::nof_nr_operating_band_fr1>
srsran_band_helper::nr_operating_bands_fr1;
constexpr std::array<srsran_band_helper::nr_band_ss_raster, srsran_band_helper::nof_nr_band_ss_raster>
srsran_band_helper::nr_band_ss_raster_table;
// Formula in 5.4.2.1
double srsran_band_helper::nr_arfcn_to_freq(uint32_t nr_arfcn)
@ -51,6 +55,55 @@ std::vector<uint32_t> srsran_band_helper::get_bands_nr(uint32_t
return bands;
}
uint16_t srsran_band_helper::get_band_from_dl_freq_Hz(double freq)
{
uint32_t freq_MHz = (uint32_t)round(freq / 1e6);
for (const nr_operating_band& band : nr_operating_bands_fr1) {
if (freq_MHz >= band.F_DL_low and freq_MHz <= band.F_DL_high) {
return band.band;
}
}
return UINT16_MAX;
}
srsran_ssb_patern_t srsran_band_helper::get_ssb_pattern(uint16_t band, srsran_subcarrier_spacing_t scs)
{
// Look for the given band and SCS
for (const nr_band_ss_raster& ss_raster : nr_band_ss_raster_table) {
// Check if band and SCS match!
if (ss_raster.band == band && ss_raster.scs == scs) {
return ss_raster.pattern;
}
// As bands are in ascending order, do not waste more time if the current band is bigger
if (ss_raster.band > band) {
return SRSRAN_SSB_PATTERN_INVALID;
}
}
// Band is out of range, so consider invalid
return SRSRAN_SSB_PATTERN_INVALID;
}
srsran_duplex_mode_t srsran_band_helper::get_duplex_mode(uint16_t band)
{
// Look for the given band
for (const nr_operating_band& b : nr_operating_bands_fr1) {
// Check if band and SCS match!
if (b.band == band) {
return b.duplex_mode;
}
// As bands are in ascending order, do not waste more time if the current band is bigger
if (b.band > band) {
return SRSRAN_DUPLEX_MODE_INVALID;
}
}
// Band is out of range, so consider invalid
return SRSRAN_DUPLEX_MODE_INVALID;
}
srsran_band_helper::nr_raster_params srsran_band_helper::get_raster_params(uint32_t nr_arfcn)
{
for (auto& fr : nr_fr_params) {

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