mirror of https://github.com/PentHertz/srsLTE.git
Added more NR band related helpers
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Xavier Arteaga
Xavier Arteaga
parent
758fd3c1ba
commit
7450232b3e
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@ -13,6 +13,7 @@
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#ifndef SRSRAN_BAND_HELPER_H
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#define SRSRAN_BAND_HELPER_H
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#include "srsran/phy/common/phy_common_nr.h"
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#include <array>
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#include <stdint.h>
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#include <vector>
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@ -44,8 +45,77 @@ public:
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// For bands with 2 possible raster offsets, delta_f_raster needs to be specified
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std::vector<uint32_t> get_bands_nr(uint32_t nr_arfcn, delta_f_raster_t delta_f_raster = DEFAULT);
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/**
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* @brief Get the lowest band that includes a given Downlink frequency in Hz
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* @param dl_freq_Hz Given frequency in Hz
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* @return The band number if the frequency is bounded in a band, UINT16_MAX otherwise
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*/
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uint16_t get_band_from_dl_freq_Hz(double dl_freq_Hz);
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/**
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* @brief Selects the SSB pattern case according to the band number and subcarrier spacing
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* @remark Described by TS 38.101-1 Table 5.4.3.3-1: Applicable SS raster entries per operating band
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* @param band NR Band number
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* @param scs SSB Subcarrier spacing
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* @return The SSB pattern case if band and subcarrier spacing match, SRSRAN_SSB_PATTERN_INVALID otherwise
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*/
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srsran_ssb_patern_t get_ssb_pattern(uint16_t band, srsran_subcarrier_spacing_t scs);
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/**
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* @brief gets the NR band duplex mode
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* @param band Given band
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* @return A valid SRSRAN_DUPLEX_MODE if the band is valid, SRSRAN_DUPLEX_MODE_INVALID otherwise
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*/
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srsran_duplex_mode_t get_duplex_mode(uint16_t band);
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private:
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// Table 5.4.2.1-1
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// Elements of TS 38.101-1 Table 5.2-1: NR operating bands in FR1
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struct nr_operating_band {
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uint16_t band;
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uint32_t F_UL_low; // in MHz
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uint32_t F_UL_high; // in MHz
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uint32_t F_DL_low; // in MHz
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uint32_t F_DL_high; // in MHz
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srsran_duplex_mode_t duplex_mode;
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};
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static const uint32_t nof_nr_operating_band_fr1 = 32;
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static constexpr std::array<nr_operating_band, nof_nr_operating_band_fr1> nr_operating_bands_fr1 = {{
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// clang-format off
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{1, 1920, 1080, 2110, 2170, SRSRAN_DUPLEX_MODE_FDD},
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{2, 1850, 1810, 1930, 1990, SRSRAN_DUPLEX_MODE_FDD},
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{3, 1710, 1785, 1805, 1880, SRSRAN_DUPLEX_MODE_FDD},
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{5, 824, 849, 869, 894, SRSRAN_DUPLEX_MODE_FDD},
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{7, 2500, 2570, 2620, 2690, SRSRAN_DUPLEX_MODE_FDD},
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{8, 880, 915, 925, 960, SRSRAN_DUPLEX_MODE_FDD},
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{12, 699, 716, 729, 746, SRSRAN_DUPLEX_MODE_FDD},
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{20, 832, 862, 791, 821, SRSRAN_DUPLEX_MODE_FDD},
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{25, 1850, 1915, 1930, 1995, SRSRAN_DUPLEX_MODE_FDD},
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{28, 703, 748, 758, 803, SRSRAN_DUPLEX_MODE_FDD},
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{34, 2010, 2025, 2010, 2025, SRSRAN_DUPLEX_MODE_TDD},
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{38, 2570, 2620, 2570, 2620, SRSRAN_DUPLEX_MODE_TDD},
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{39, 1880, 1920, 1880, 1920, SRSRAN_DUPLEX_MODE_TDD},
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{40, 2300, 2400, 2300, 2400, SRSRAN_DUPLEX_MODE_TDD},
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{41, 2496, 2690, 2496, 2690, SRSRAN_DUPLEX_MODE_TDD},
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{50, 1432, 1517, 1432, 1517, SRSRAN_DUPLEX_MODE_TDD},
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{51, 1427, 1432, 1427, 1432, SRSRAN_DUPLEX_MODE_TDD},
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{66, 1710, 1780, 2110, 2200, SRSRAN_DUPLEX_MODE_FDD},
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{70, 1695, 1710, 1995, 2020, SRSRAN_DUPLEX_MODE_FDD},
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{71, 663, 698, 617, 652, SRSRAN_DUPLEX_MODE_FDD},
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{74, 1427, 1470, 1475, 1518, SRSRAN_DUPLEX_MODE_FDD},
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{75, 0, 0, 1432, 1517, SRSRAN_DUPLEX_MODE_SDL},
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{76, 0, 0, 1427, 1432, SRSRAN_DUPLEX_MODE_SDL},
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{77, 3300, 4200, 3300, 4200, SRSRAN_DUPLEX_MODE_TDD},
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{78, 3300, 3800, 3300, 3800, SRSRAN_DUPLEX_MODE_TDD},
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{79, 4400, 5000, 4400, 5000, SRSRAN_DUPLEX_MODE_TDD},
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{80, 1710, 1785, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
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{81, 880, 915, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
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{82, 832, 862, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
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{83, 703, 748, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
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{84, 1920, 1980, 0, 0, SRSRAN_DUPLEX_MODE_SUL},
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{86, 1710, 1780, 0, 0, SRSRAN_DUPLEX_MODE_SUL}
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// clang-format on
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}};
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struct nr_raster_params {
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double delta_F_global_kHz;
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double F_REF_Offs_MHz;
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@ -140,7 +210,7 @@ private:
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// clang-format on
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}};
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static const uint32_t nof_nr_bands_fr2 = 36;
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static const uint32_t nof_nr_bands_fr2 = 8;
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static constexpr std::array<nr_band, nof_nr_bands_fr2> nr_band_table_fr2 = {{
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{257, KHZ_60, 2054166, 1, 2104165, 2054166, 1, 2104165},
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{257, KHZ_120, 2054167, 2, 2104165, 2054167, 20, 2104165},
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@ -154,6 +224,48 @@ private:
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{261, KHZ_60, 2070833, 1, 2084999, 2070833, 1, 2084999},
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{261, KHZ_120, 2070833, 2, 2084999, 2070833, 2, 2084999}
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}};
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// Elements of TS 38.101-1 Table 5.4.3.3-1 : Applicable SS raster entries per operating band
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struct nr_band_ss_raster {
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uint16_t band;
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srsran_subcarrier_spacing_t scs;
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srsran_ssb_patern_t pattern;
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uint32_t gscn_first;
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uint32_t gscn_step;
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uint32_t gscn_last;
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};
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static const uint32_t nof_nr_band_ss_raster = 29;
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static constexpr std::array<nr_band_ss_raster, nof_nr_band_ss_raster> nr_band_ss_raster_table = {{
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{1, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5419},
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{2, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4969},
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{3, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4517, 1, 4693},
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{5, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2177, 1, 2230},
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{5, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 2183, 1, 2224},
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{7, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6554, 1, 6718},
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{8, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 2318, 1, 2395},
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{12, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1828, 1, 1858},
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{20, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1982, 1, 2047},
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{25, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4829, 1, 4981},
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{28, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1901, 1, 2002},
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{34, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5030, 1, 5056},
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{38, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6431, 1, 6544},
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{39, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4706, 1, 4795},
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{40, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5756, 1, 5995},
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{41, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 6246, 3, 6717},
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{41, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 6252, 3, 6714},
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{50, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
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{51, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
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{66, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 5279, 1, 5494},
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{66, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_B, 5285, 1, 5488},
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{70, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 4993, 1, 5044},
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{71, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 1547, 1, 1624},
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{74, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3692, 1, 3790},
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{75, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3584, 1, 3787},
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{76, srsran_subcarrier_spacing_15kHz, SRSRAN_SSB_PATTERN_A, 3572, 1, 3574},
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{77, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8329},
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{78, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 7711, 1, 8051},
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{79, srsran_subcarrier_spacing_30kHz, SRSRAN_SSB_PATTERN_C, 8480, 16, 8880},
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}};
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};
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} // namespace srsran
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@ -328,8 +328,26 @@ typedef enum SRSRAN_API {
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srsran_subcarrier_spacing_60kHz,
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srsran_subcarrier_spacing_120kHz,
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srsran_subcarrier_spacing_240kHz,
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srsran_subcarrier_spacing_invalid
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} srsran_subcarrier_spacing_t;
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typedef enum SRSRAN_API {
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SRSRAN_SSB_PATTERN_A = 0, // FR1, 15 kHz SCS
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SRSRAN_SSB_PATTERN_B, // FR1, 30 kHz SCS
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SRSRAN_SSB_PATTERN_C, // FR1, 30 kHz SCS
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SRSRAN_SSB_PATTERN_D, // FR2, 120 kHz SCS
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SRSRAN_SSB_PATTERN_E, // FR2, 240 kHz SCS
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SRSRAN_SSB_PATTERN_INVALID,
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} srsran_ssb_patern_t;
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typedef enum SRSRAN_API {
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SRSRAN_DUPLEX_MODE_FDD = 0, // Paired
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SRSRAN_DUPLEX_MODE_TDD, // Unpaired
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SRSRAN_DUPLEX_MODE_SDL, // Supplementary DownLink
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SRSRAN_DUPLEX_MODE_SUL, // Supplementary UpLink
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SRSRAN_DUPLEX_MODE_INVALID
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} srsran_duplex_mode_t;
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/**
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* @brief NR carrier parameters. It is a combination of fixed cell and bandwidth-part (BWP)
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*/
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@ -19,6 +19,10 @@ namespace srsran {
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constexpr std::array<srsran_band_helper::nr_band, srsran_band_helper::nof_nr_bands_fr1>
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srsran_band_helper::nr_band_table_fr1;
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constexpr std::array<srsran_band_helper::nr_raster_params, 3> srsran_band_helper::nr_fr_params;
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constexpr std::array<srsran_band_helper::nr_operating_band, srsran_band_helper::nof_nr_operating_band_fr1>
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srsran_band_helper::nr_operating_bands_fr1;
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constexpr std::array<srsran_band_helper::nr_band_ss_raster, srsran_band_helper::nof_nr_band_ss_raster>
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srsran_band_helper::nr_band_ss_raster_table;
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// Formula in 5.4.2.1
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double srsran_band_helper::nr_arfcn_to_freq(uint32_t nr_arfcn)
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@ -51,6 +55,55 @@ std::vector<uint32_t> srsran_band_helper::get_bands_nr(uint32_t
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return bands;
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}
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uint16_t srsran_band_helper::get_band_from_dl_freq_Hz(double freq)
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{
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uint32_t freq_MHz = (uint32_t)round(freq / 1e6);
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for (const nr_operating_band& band : nr_operating_bands_fr1) {
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if (freq_MHz >= band.F_DL_low and freq_MHz <= band.F_DL_high) {
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return band.band;
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}
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}
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return UINT16_MAX;
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}
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srsran_ssb_patern_t srsran_band_helper::get_ssb_pattern(uint16_t band, srsran_subcarrier_spacing_t scs)
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{
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// Look for the given band and SCS
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for (const nr_band_ss_raster& ss_raster : nr_band_ss_raster_table) {
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// Check if band and SCS match!
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if (ss_raster.band == band && ss_raster.scs == scs) {
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return ss_raster.pattern;
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}
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// As bands are in ascending order, do not waste more time if the current band is bigger
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if (ss_raster.band > band) {
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return SRSRAN_SSB_PATTERN_INVALID;
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}
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}
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// Band is out of range, so consider invalid
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return SRSRAN_SSB_PATTERN_INVALID;
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}
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srsran_duplex_mode_t srsran_band_helper::get_duplex_mode(uint16_t band)
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{
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// Look for the given band
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for (const nr_operating_band& b : nr_operating_bands_fr1) {
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// Check if band and SCS match!
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if (b.band == band) {
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return b.duplex_mode;
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}
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// As bands are in ascending order, do not waste more time if the current band is bigger
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if (b.band > band) {
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return SRSRAN_DUPLEX_MODE_INVALID;
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}
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}
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// Band is out of range, so consider invalid
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return SRSRAN_DUPLEX_MODE_INVALID;
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}
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srsran_band_helper::nr_raster_params srsran_band_helper::get_raster_params(uint32_t nr_arfcn)
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{
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for (auto& fr : nr_fr_params) {
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