/* lteenb configuration file version 2022-03-08
 * Copyright (C) 2019-2022 Amarisoft
 * LTE FDD cell + NR FDD cell at the same frequency
 */

/* Values: 1 (SISO), 2 (MIMO 2x2), 4 (MIMO 4x4) */
#define N_ANTENNA_DL        1 

/* Values: 0 (NSA NR), 1 (SA and NSA NR) */
#define ALLOW_SA            1

/* define it to disable LTE-CRS: schedule NR only in LTE MBMS subframes */
//#define MBMS_ONLY

{
  //log_options: "all.level=debug,all.max_size=1",
  log_options: "all.level=error,all.max_size=0,nas.level=debug,nas.max_size=1,s1ap.level=debug,s1ap.max_size=1,ngap.level=debug,ngap.max_size=1,x2ap.level=debug,x2ap.max_size=1,rrc.level=debug,rrc.max_size=1",

  log_filename: "/tmp/gnb0.log",

  /* Enable remote API and Web interface */
  com_addr: "0.0.0.0:9001",

#if 1
  rf_driver: {
        name: "sdr",

        /* list of devices. 'dev0' is always the master. */
        args: "dev0=/dev/sdr0",
        /* TDD: force the RX antenna on the RX connector (NR does not
           support yet sharing TX and RX on the TX connector) */
        rx_antenna: "rx",

        /* synchronisation source: none, internal, gps, external (default = none) */
        // sync: "gps",
  },
  tx_gain: 90.0, /* TX gain (in dB) */
  rx_gain: 60.0, /* RX gain (in dB) */
#else
  include "rf_driver/config.cfg",
#endif

  rf_ports: [
    {
       /* RF port for the LTE cell */
    },
  ],
    
  mme_list: [ 
    { 
      /* address of MME for S1AP connection. Must be modified if the MME runs on a different host. */
      mme_addr: "127.0.1.100",
    },
  ],
  /* GTP bind address (=address of the ethernet interface connected to
     the MME). Must be modified if the MME runs on a different host. */
  gtp_addr: "127.0.1.1",

  /* high 24 bits of SIB1.cellIdentifier */
  enb_id: 0x1A2D0,

#if ALLOW_SA
  gnb_id_bits: 28,
  gnb_id: 0x12345,

  amf_list: [
    {
      /* address of AMF for NGAP connection. Must be modified if the AMF runs on a different host. */
      amf_addr: "127.0.1.100",
    },
  ],
#endif

  en_dc_support: true,

  /* list of cells */
  cell_list: [
  {
    rf_port: 0,
    /* Broadcasted PLMN identities */
    plmn_list: [
      "00101", 
    ],
    dl_earfcn: 2525, /* 881.5 MHz */
    n_id_cell: 1,
    cell_id: 0x01,
    tac: 0x0001,
    root_sequence_index: 28, /* PRACH root sequence index */
    en_dc_scg_cell_list: [ { cell_id: 0x02 } ],
  },
  ], /* cell_list */

  nr_cell_list: [
  {
    rf_port: 0,
#if ALLOW_SA
    plmn_list: [ {
      tac: 100,
      plmn: "00101",
      reserved: false,
      },
    ],
#endif
    cell_id: 0x02,
    band: 5,
    dl_nr_arfcn: 176300, /* 881.5 MHz */
    root_sequence_index: 1, /* PRACH root sequence index */
  },
  ], /* nr_cell_list */

  /* default cell parameters */
  cell_default: {
    n_antenna_dl: N_ANTENNA_DL,
    n_antenna_ul: 1,
    n_rb_dl: 50, /* Bandwidth: 25: 5 MHz, 50: 10 MHz, 75: 15 MHz, 100: 20 MHz */
    cyclic_prefix: "normal",

    phich_duration: "normal",
    phich_resource: "1", /* ratio of NG */

    /* SIB1 */
    si_value_tag: 0, /* increment modulo 32 if SI is modified */
    cell_barred: false, /* SIB1.cellBarred-r13 */
    intra_freq_reselection: true, /* SIB1.intraFreqReselection */
    q_rx_lev_min: -70, /* SIB1.q-RxLevMin */
    p_max: 10, /* maximum power allowed for the UE (dBm) */
    si_window_length: 40, /* ms */
    sib_sched_list: [ 
      {
        filename: "sib2_3_nosrs.asn",
        si_periodicity: 16, /* frames */
      },
    ],

    /* MCS for Msg3 (=CCCH RRC Connection Request) */
    pusch_msg3_mcs: 0,
    si_coderate: 0.20,   /* maximum code rate for SI/RA/P-RNTI messages */
    /* Scheduling request period (ms). Must be >= 40 for HD-FDD */
    sr_period: 80, 
    /* CQI report config */
    cqi_period: 80, /* period (ms). Must be >= 32 for HD-FDD */
    /* this CQI value is assumed when none is received from the UE */
    initial_cqi: 3,
    n_symb_cch: 0,
    si_pdcch_format: 2, /* 2 or 3. Log2 of the number of CCEs for PDCCH
                           for SI/RA/P-RNTI */

    /* PDSCH dedicated config (currently same for all UEs) */
    pdsch_dedicated: {
#if N_ANTENNA_DL >= 4
      p_a: -6,
#elif N_ANTENNA_DL == 2
      p_a: -3,
#else
      p_a: 0,
#endif
      p_b: -1, /* -1 means automatic */
    },

    /* If defined, force for number of CCEs for UE specific PDCCH to
       2^pdcch_format. Otherwise it is computed from the reported
       CQI. Range: 0 to 3. */
    /* pdcch_format: 2,  */

    /* if defined, force the PDSCH MCS for all UEs. Otherwise it is
       computed from the reported CQI */ 
    /* pdsch_mcs: 12, */
    dl_256qam: true,

    prach_config_index: 3, /* subframe 1 every 10 ms */
    prach_freq_offset: -1, /* -1 means automatic */

    /* PUCCH dedicated config (currently same for all UEs) */
    pucch_dedicated: {
      n1_pucch_sr_count: 11, /* increase if more UEs are needed */
      cqi_pucch_n_rb: 1, /* increase if more UEs are needed */
    },

    /* PUSCH dedicated config (currently same for all UEs) */
    pusch_dedicated: {
      beta_offset_ack_index: 9,
      beta_offset_ri_index: 6,
      beta_offset_cqi_index: 6,
    },

    pusch_hopping_offset: -1, /* -1 means automatic */

    /* if defined, force the PUSCH MCS for all UEs. Otherwise it is
       computed from the last received SRS/PUSCH. */ 
    /* pusch_mcs: 26, */

#if N_ANTENNA_DL >= 2
    /* RI reporting is done with a period of m_ri * cqi_period. 
       m_ri = 0 (default) disables RI reporting. */
    m_ri: 8,
    /* transmission mode */
    transmission_mode: 3,
#endif

    /* MAC configuration (same for all UEs) */
    mac_config: {
       ul_max_harq_tx: 5, /* max number of HARQ transmissions for uplink */
       dl_max_harq_tx: 5, /* max number of HARQ transmissions for downlink */
    },

    /* CPU load limitation */
    //pusch_max_mcs: 18, /* max MCS value */
    //pusch_max_its: 6, /* max number of turbo decoder iterations */

    /* dynamic power control */
    dpc: true,
    dpc_pusch_snr_target: 25,
    dpc_pucch_snr_target: 20,

    /* RRC/UP ciphering algorithm preference. EEA0 is always the last. */
    cipher_algo_pref: [],
    /* RRC integrity algorithm preference. EIA0 is always the last. */
    integ_algo_pref: [1, 2],

    /* (in ms) send RRC connection release after this time of network
       inactivity */ 
    inactivity_timer: 10000,

    /* measurement configuration */
    meas_config_desc: {
      a1_report_type: "rsrp",
      a1_rsrp: -70,
      a1_hysteresis: 10,
      a1_time_to_trigger: 320,
      a2_report_type: "rsrp",
      a2_rsrp: -110,
      a2_hysteresis: 0,
      a2_time_to_trigger: 640,
      a3_report_type: "rsrp",
      a3_offset: 6,
      a3_hysteresis: 0,
      a3_time_to_trigger: 256,
      rsrp_filter_coeff: 3,
      nr_b1_report_type: "rsrp",
      nr_b1_rsrp: -100,
      nr_b1_hysteresis: 0,
      nr_b1_time_to_trigger: 100,
      nr_rsrp_filter_coeff: 3
    },
    meas_gap_config: "gp0",

    /* DRB configuration */
    drb_config: "drb.cfg",

    /* reserved MBMS subframes for the NR SSB */
    reserved_mbms_subframes: {
      sf_alloc: [ {
#ifdef MBMS_ONLY
        /* 2 subframes every 10 ms reserved for NR */
        radio_frame_allocation_period: 1, /* 10 ms */
        radio_frame_allocation_offset: 0,
        subframe_allocation: "100100", /* subframe 1 and 6 */
#else
        radio_frame_allocation_period: 2, /* 20 ms */
        radio_frame_allocation_offset: 0,
        subframe_allocation: "100000", /* subframe 1 */
#endif
      } ],
      n_symb_cch: 1,
    },
  },

  nr_cell_default: {
    subcarrier_spacing: 15, /* kHz */
    bandwidth: 10, /* MHz */
    n_antenna_dl: N_ANTENNA_DL,
    n_antenna_ul: 1,

    n_id_cell: 500,
    ssb_pos_bitmap: "0001",
    ssb_period: 20, /* in ms */

#if ALLOW_SA
    cell_barred: false,
    intra_freq_reselection: true,
    q_rx_lev_min: -70,
    q_qual_min: -20,
    inactivity_timer: 10000,
    si_window_length: 40,
#endif
    p_max: 10, /* maximum UE power in dBm */

    /* Scheduling request period (slots). */
    sr_period: 40,

    dmrs_type_a_pos: 3,

    n_timing_advance_offset: 0, /* to align with LTE */
    ul_frequency_shift_7p5_khz: true, /* to align with LTE */
#ifndef MBMS_ONLY
    lte_crs: "auto",
#endif

    prach: {
      prach_config_index: 16, /* subframe 1 every frame, LTE PRACH
                                 at the same position */
      msg1_fdm: 1,
      msg1_frequency_start: 4,
      zero_correlation_zone_config: 11,
      preamble_received_target_power: -110, /* in dBm */
      preamble_trans_max: 7,
      power_ramping_step: 4, /* in dB */
      ra_response_window: 10, /* in slots */
      restricted_set_config: "unrestricted_set",
      ra_contention_resolution_timer: 64, /* in ms */
      ssb_per_prach_occasion: 1,
      cb_preambles_per_ssb: 8,
    },

    pdcch: {
#if ALLOW_SA
      n_rb_coreset0: 48,
      n_symb_coreset0: 1,
      search_space0_index: 1, /* 1 symbol, starting at symbol 1 for odd SSB */
      si_al_index: 2,
      dedicated_coreset: {
        rb_start: -1, /* -1 to have the maximum bandwidth */
        l_crb: -1, /* -1 means all the bandwidth */
        duration: 1,
        precoder_granularity: "sameAsREG_bundle",
      },
#else
      common_coreset: {
        rb_start: -1, /* -1 to have the maximum bandwidth */
        l_crb: -1, /* -1 means all the bandwidth */
        duration: 1,
        precoder_granularity: "sameAsREG_bundle",
      },
#endif
      css: {
        n_candidates: [ 0, 0, 4, 0, 0 ],
        start_symb: 1,
      },
      rar_al_index: 2,

      uss: {
        n_candidates: [ 0, 4, 0, 0, 0 ],
        dci_0_1_and_1_1: true,
        start_symb: 1,
      },
      al_index: 1,
    },

    pdsch: {
      mapping_type: "typeA",
      start_symb: 2,
      n_symb: 12,
      dmrs_add_pos: 1,
      dmrs_type: 1,
      dmrs_max_len: 1,
      /* k0 delay in slots from DCI to PDSCH: automatic setting */
      /* k1 delay in slots from PDSCH to PUCCH/PUSCH ACK/NACK: automatic setting */
      mcs_table: "qam256",
#if N_ANTENNA_DL >= 2
      x_overhead: 12, /* 12 REs reserved for LTE CRS */
#else
      x_overhead: 6, /* 6 REs reserved for LTE CRS */
#endif
      rar_mcs: 2,
#if ALLOW_SA
      si_mcs: 6,
#endif
      /* If defined, force the PDSCH MCS for all UEs. Otherwise it is computed
       * based on DL channel quality estimation */
      /* mcs: 24, */
    },
    
    pucch: {
      pucch_group_hopping: "neither",
      hopping_id: -1, /* -1 = n_cell_id */
      p0_nominal: -90,
#if 0
        pucch0: {
          initial_cyclic_shift: 1,
          n_symb: 1,
        },
#else
        pucch1: {
          n_cs: 3,
          n_occ: 3,
          freq_hopping: true,
        },
#endif
#if 1
        pucch2: {
          n_symb: 2,
          n_prb: 1,
          freq_hopping: true,
          simultaneous_harq_ack_csi: false,
          max_code_rate: 0.25,
        },
#endif
#if 0
        pucch3: {
          bpsk: false,
          additional_dmrs: false,
          freq_hopping: true,
          n_prb: 1,
          simultaneous_harq_ack_csi: false, 
          max_code_rate: 0.25,
        },
#endif
#if 0
        pucch4: {
          occ_len: 4,
          bpsk: false,
          additional_dmrs: false,
          freq_hopping: true,
          simultaneous_harq_ack_csi: false, 
          max_code_rate: 0.25,
        },
#endif
    },

    pusch: {
      mapping_type: "typeA",
      n_symb: 14,
      dmrs_add_pos: 1,
      dmrs_type: 1,
      dmrs_max_len: 1,
      tf_precoding: false,
      mcs_table: "qam256", /* without transform precoding */
      mcs_table_tp: "qam256", /* with transform precoding */
      ldpc_max_its: 5,
      /* k2, msg3_k2 delay in slots from DCI to PUSCH: automatic setting */
      p0_nominal_with_grant: -84,
      msg3_mcs: 4,
      msg3_delta_power: 0, /* in dB */
      beta_offset_ack_index: 9,

      /* hardcoded scheduling parameters */
      n_dmrs_cdm_groups: 1,
      n_layer: 1,
      /* if defined, force the PUSCH MCS for all UEs. Otherwise it is
       computed from the last received PUSCH. */ 
      /* mcs: 16, */
    },

    /* MAC configuration */
    mac_config: {
       msg3_max_harq_tx: 5,
       ul_max_harq_tx: 5, /* max number of HARQ transmissions for uplink */
       dl_max_harq_tx: 5, /* max number of HARQ transmissions for downlink */
       ul_max_consecutive_retx: 30, /* disconnect UE if reached */
       dl_max_consecutive_retx: 30, /* disconnect UE if reached */
       periodic_bsr_timer: 20,
       retx_bsr_timer: 320,
       periodic_phr_timer: 500,
       prohibit_phr_timer: 200,
       phr_tx_power_factor_change: "dB3",
       sr_prohibit_timer: 0, /* in ms, 0 to disable the timer */
       sr_trans_max: 64,               
    },

    cipher_algo_pref: [],
    integ_algo_pref: [2, 1],

    srb3_support: false,

    drb_config: "drb_nr.cfg",
  },
}