/* lteenb configuration file version 2025-01-21
 * Copyright (C) 2019-2025 Amarisoft
 * NR SA NTN cell */


#define NTN_FR2              0
#define NTN_MODE             2   // 0: GEO, 1: MEO, 2: LEO
#if NTN_FR2
#define NR_BANDWIDTH         100 // NR cell bandwidth
#else
#define NR_BANDWIDTH         10  // NR cell bandwidth, limited to 20 MHz in NTN bands 255 or 256
#endif
#define N_ANTENNA_DL         1   // Values: 1 (SISO), 2 (MIMO 2x2), 4 (MIMO 4x4)
#define N_ANTENNA_UL         1   // Values: 1, 2, 4
#define CHANNEL_SIM          1   // Enable satellite link emulation within eNB DL channel simulator

#if NTN_MODE == 0
#define CSI_SRS_PERIOD 320
#define MAX_HARQ 2
#define T3XX_TIMER 2000
#define SRB_T_POLL_RETX 800
#elif NTN_MODE == 1
#define CSI_SRS_PERIOD 80
#define MAX_HARQ 5
#define T3XX_TIMER 1000
#define SRB_T_POLL_RETX 150
#else
#define CSI_SRS_PERIOD 40
#define MAX_HARQ 5
#define T3XX_TIMER 1000
#define SRB_T_POLL_RETX 80
#endif

#ifndef SAT_ALTITUDE
#define SAT_ALTITUDE 650e3
#endif

{
  log_options: "all.level=debug,all.max_size=1,phy.ntn=1",
  //log_options: "all.level=error,all.max_size=0,nas.level=debug,nas.max_size=1,ngap.level=debug,ngap.max_size=1,xnap.level=debug,xnap.max_size=1,rrc.level=debug,rrc.max_size=1",

  log_filename: "/tmp/gnb0.log",

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

  rf_driver: {
        name: "sdr",

        /* list of devices. 'dev0' is always the master. */
#if N_ANTENNA_DL >= 4
        args: "dev0=/dev/sdr0,dev1=/dev/sdr1",
#else
        args: "dev0=/dev/sdr0",
#endif
        /* TDD: force the RX antenna on the RX connector */
        rx_antenna: "rx",

        /* synchronisation source: none, internal, gps, external (default = none) */
        // sync: "gps",
        
  },
  tx_gain: 70.0, /* TX gain (in dB) */
  rx_gain: 50.0, /* RX gain (in dB) */


  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",
    },
  ],
  /* GTP bind address (=address of the ethernet interface connected to
     the AMF). Must be modified if the AMF runs on a different host. */
  gtp_addr: "127.0.1.1",
#ifdef GTP_U_BUNDLING
  gtp_use_packet_bundling: true,
#endif

  gnb_id_bits: 28,
  gnb_id: 0x12345,

#if CHANNEL_SIM
  rf_ports: [
    {
      channel_dl: {
        type: "awgn",
        noise_level: -50
      }
    },
  ],
#endif
  rx_ta_offset: 180,	/* Add a safety margin in UL reception window in case the UE overcompensates the TA */
  
/* list of cells */
  cell_list: [],

  nr_cell_list: [
  {
    rf_port: 0,
    cell_id: 0x01,
#if NTN_FR2
    band: 510,
    dl_nr_arfcn: 1734048,
    ul_nr_arfcn: 2080000,
    subcarrier_spacing: 120,
    ssb_pos_bitmap: "0100000000000000000000000000000000000000000000000000000000000000",
#else
    band: 7,
    dl_nr_arfcn: 536000,
    ssb_subcarrier_spacing: 15,
    subcarrier_spacing: 15,
    ssb_pos_bitmap: "1010", 
    force_full_bsr: true, 
    force_dl_schedule: true, 
    pdsch_mcs: 2,
#endif
#if NTN_MODE == 0
    ssb_period: 20,
#else
    ssb_period: 5,  /* Close SSBs allow for better timing estimation on UE side */
#endif

    n_id_cell: 500,
  },
  ], /* nr_cell_list */

  nr_cell_default: {
    bandwidth: NR_BANDWIDTH, /* MHz */
    n_antenna_dl: N_ANTENNA_DL,
    n_antenna_ul: N_ANTENNA_UL,

    
    plmn_list: [ {
      tac: 100,
      plmn: "00101",
      reserved: false,
      nssai: [
        {
         sst: 1,
        },
      ],
      },
    ],

    sib_sched_list: [
      {
        filename: "sib2_nr.asn",
        si_periodicity: 16,
      }
    ],
    si_window_length: 40,

    cell_barred: false,
    intra_freq_reselection: true,
    q_rx_lev_min: -70,
    q_qual_min: -20,
    root_sequence_index: 12, /* PRACH root sequence index */

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

    dmrs_type_a_pos: 2,
    prach: {
      prach_config_index: 32,
      msg1_fdm: 1,
      msg1_frequency_start: -1,
      zero_correlation_zone_config: 0,
      preamble_received_target_power: -110, /* in dBm */
      preamble_trans_max: 7,
      power_ramping_step: 4, /* in dB */
      ra_response_window: 10, //sp /* in slots */
      restricted_set_config: "unrestricted_set",
      ra_contention_resolution_timer: 64, /* in ms */
      ssb_per_prach_occasion: 4,
      cb_preambles_per_ssb: 1, 
    },

    pdcch: {
      search_space0_index: 0,
      dedicated_coreset: {
        rb_start: -1, /* -1 to have the maximum bandwidth */
        l_crb: -1, /* -1 means all the bandwidth */
        duration: 0, /* 0 means to automatically set it from the coreset bandwidth */
        precoder_granularity: "sameAsREG_bundle",
      },
      css: {
        n_candidates: [ 0, 0, 4, 0, 0 ],
      },
      rar_al_index: 2,
      si_al_index: 2,
      uss: {
        n_candidates: [ 8, 0, 0, 0, 0 ],
        dci_0_1_and_1_1: true,
      },
      al_index: 0,
    },

pdsch: {
      mapping_type: "typeA",
      dmrs_add_pos: 1,
      dmrs_type: 1,
      dmrs_max_len: 1,
      mcs_table: "qam256",
      rar_mcs: 2,
      si_mcs: 6,
    },

     csi_rs: {
        resource_auto: {
          nzp_csi_rs_period: 80
        },
        csi_report_config: [
          {
            report_config_type: "periodic",
            period: 80,
          },
        ],
      },

     srs: {
        resource_auto: {
          codebook: {
            resource_type: "periodic",
            period: 80,
            wideband: true
          }
        }
      },

      pucch: {
        p0_nominal: -90,
        resource_auto: {},
      },
    
     pusch: {
      tf_precoding: false,
      mcs_table: "qam256", /* without transform precoding */
      mcs_table_tp: "qam256", /* with transform precoding */
      ldpc_max_its: 5,
      p0_nominal_with_grant: -90,
      msg3_mcs: 4,
      msg3_delta_power: 0, /* in dB */
      beta_offset_ack_index: 9,
      max_rank: N_ANTENNA_UL,
      ta_upd_snr_threshold: 3.0,    /* Allow TA updates in msot cases */
      /* if defined, force the PUSCH MCS for all UEs. Otherwise it is
       computed from the last received PUSCH. */
       mcs: 7,
#if NTN_FR2
      n_harq_process: 32,
#endif
    },

        /* 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: 0,
         prohibit_phr_timer: 200,
         phr_tx_power_factor_change: "dB3",
         time_alignment_tx_timer: 40,
         sr_prohibit_timer: 16, 
         sr_trans_max: 64,
      },
      ntn: {
        default_ephemeris: "leo",
        default_sma: 6378e3 + SAT_ALTITUDE,
        default_elevation_offset: -40,
        min_expected_elevation: 45,
        ground_position: {
         latitude: 45,
         longitude: 0,
         altitude: 0
        },
        feeder_doppler_compensation: true,
        direct_to_cell: {
          cell_center: {
            latitude: 43,
            longitude: 1,
            altitude: 5000,
          },
        },
        large_freq_shift: {
          prach_range_sc: 24,
          prach_n_acc: 1,
          ta_tolerance: 8,
        },
        channel_sim_control: {
          type: "auto_feeder_service_link",
          ue_position: {
            latitude: 43.02,
            longitude: 1.2,
            altitude: 0,
          },
          ue_doppler_shift: true,
          ue_dl_attenuation: false, 
          ue_dl_gain_offset: 65, 
        }
      },
      compute_freq_shift: true,

     timers_and_constants: {
        t310: 6000,
        t300: 2000,
      },

    inactivity_timer: 100000,

    srb_config: [
      {
        id: 1,
        t_PollRetransmit: 500,
      },
      {
        id: 2,
        t_PollRetransmit: 500,
      }
    ],
    
 
    cipher_algo_pref: [],
    integ_algo_pref: [2, 1],

    drb_config: "drb_nr.cfg",
  },
}