Error with 5G SA connection establishment between srsUE+ Amarisoft Callbox Pro gNB

[fahad-ece]

Dear All,

I was trying establish a connection (5G NR SA) between srsUE and Amarisoft Callbox Pro gNB by following the link below:
[https://docs.srsran.com/projects/4g/en/latest/app_notes/source/5g_sa_amari/source/index.html]

Intended Band: N3
SCS: 15 kHz

Unfortunately I have failed to establish the connection. I am hereby providing the details of the configuration files of srsUE and Amarisoft Callbox Pro gNB:
--------------------------------------------------------------------------srsUE.conf--------------------------------------------------------------------------------------------
[rf]
freq_offset = 0
tx_gain = 50
rx_gain = 40

nof_antennas = 1

srate = 23.04e6

device_name = uhd
device_args = type=b200,serial=32BBA1B,sampling_rate=23.04e6,lo_freq_offset_hz=23.04e6,None

[rat.eutra]
dl_earfcn = 2850
nof_carriers = 0

[rat.nr]
nof_carriers = 1
bands = 3

[pcap]
enable = mac,nas
mac_filename = /tmp/srsue.pcap
mac_nr_filename = /tmp/srsue.pcap
nas_filename = /tmp/ue_nas.pcap

[log]
all_level = info
phy_lib_level = none
all_hex_limit = 32
filename = /tmp/srsue.log
file_max_size = -1
nas_level = warning

[usim]
mode = soft
algo = milenage
opc = 000102030405060708090A0B0C0D0E0F
k = 00112233445566778899AABBCCDDEEFF
imsi = 001010000000001
imei = 001010000000001

[rrc]
release = 15
ue_category = 4
mbms_service_id = -1

[nas]
apn = internet

[phy]

[sim]
airplane_t_on_ms = -1
airplane_t_off_ms = -1

[general]
metrics_csv_enable = true
metrics_csv_filename = /tmp/srsue_metrics.csv
-------------------------------------------------------------------------------end------------------------------------------------------------------------------------------------
--------------------------------------------------------------------------gnb-sa-fdd-n3.cfg----------------------------------------------------------------------------------
/* lteenb configuration file version 2024-08-09

• Copyright (C) 2019-2024 Amarisoft
• NR SA FDD or TDD cell */

#define NR_TDD 0 // Values: 0 (NR FDD), 1(NR TDD)
#define FR2 0 // Values: 0 (FR1), 1 (FR2)
#if FR2
#define UDC_TYPE 1 // Values: 0 (NO UDC), 1 (B2), 2 (A2), 3 (B4) (refer to application note to identify your UDC type)
#define NR_TDD_CONFIG 10 // Values: FR1: 1, 2, 3, 4 (compatible with LTE TDD config 2) FR2: 10
#define NR_BANDWIDTH 100 // NR cell bandwidth
#define IF_ATTENUATION -9 // Value: 10*log10(N_PORTS_COMBINER) + external evenutal IF attenuators
#else
#define NR_TDD_CONFIG 2 // Values: FR1: 1, 2, 3, 4 (compatible with LTE TDD config 2) FR2: 10
#define NR_BANDWIDTH 20 // NR cell bandwidth
#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 NR_LONG_PUCCH_FORMAT 2 // Values: 2, 3, 4

/* define to 1 to enable periodic SRS with N_ANTENNA_UL ports. Uplink
SU-MIMO is also enabled if N_ANTENNA_UL >= 2. Not all UEs support
uplink SU-MIMO. */
#define USE_SRS 0

{
//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,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: 90.0, /* TX gain (in dB) /
rx_gain: 60.0, / RX gain (in dB) */

#if FR2 == 1
udc_ports: [
{
#if UDC_TYPE == 1 // B2 type
#if N_ANTENNA_DL == 1
args: "/dev/ttyUSB0",
#elif N_ANTENNA_DL == 2
args: "/dev/ttyUSB0;/dev/ttyUSB1",
#else
#error Unsupported number of MIMO layers in FR2
#endif
#elif UDC_TYPE == 2 // A2 type
#if N_ANTENNA_DL == 1
args: "/dev/ttyACM0",
#elif N_ANTENNA_DL == 2
args: "/dev/ttyACM0;/dev/ttyACM1",
#else
#error Unsupported number of MIMO layers in FR2
#endif
#elif UDC_TYPE == 3 // B4 type
args: "/dev/ttyUSB0",
#else
#warning No UDC used for FR2 testing
#endif

cmd: "udc-auto-cfg.sh",

},
],
#endif

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,

en_dc_support: true,

rf_ports: [
{
#if FR2
udc_port: 0,
tx_power_offset:IF_ATTENUATION,
#endif
},
],

/* list of cells */
cell_list: [],

nr_cell_list: [
{
rf_port: 0,
cell_id: 0x01,
#if NR_TDD == 1
#if FR2
band: 257,
dl_nr_arfcn: 2079167, /* 28000.08 MHz /
subcarrier_spacing: 120, / kHz */
ssb_pos_bitmap: "0100000000000000000000000000000000000000000000000000000000000000",

rx_to_tx_latency: 9, /* slots */

#else
band: 78,
dl_nr_arfcn: 632628, /* 3489.42 MHz /
subcarrier_spacing: 30, / kHz /
ssb_pos_bitmap: "10000000",
#endif
#else
band: 3,
dl_nr_arfcn: 368500, / 2680 MHz /
subcarrier_spacing: 15, / kHz /
ssb_pos_bitmap: "1000",
#endif
},
], / nr_cell_list */

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

/* force the timing TA offset (optional) */

// n_timing_advance_offset: 39936,
/* subframe offset to align with the LTE TDD pattern (optional) */
// subframe_offset: 2,

#if NR_TDD == 1
tdd_ul_dl_config: {
#if NR_TDD_CONFIG == 1
pattern1: {
period: 5, /* in ms /
dl_slots: 7,
dl_symbols: / 6 / 2,
ul_slots: 2,
ul_symbols: 2,
},
#elif NR_TDD_CONFIG == 2
pattern1: {
period: 5, / in ms /
dl_slots: 7,
dl_symbols: 6,
ul_slots: 2,
ul_symbols: 4,
},
#elif NR_TDD_CONFIG == 3
pattern1: {
period: 5, / in ms /
dl_slots: 6,
dl_symbols: 2,
ul_slots: 3,
ul_symbols: 2,
},
#elif NR_TDD_CONFIG == 4
pattern1: {
period: 3, / in ms /
dl_slots: 3,
dl_symbols: 6,
ul_symbols: 4,
ul_slots: 2,
},
pattern2: {
period: 2, / in ms /
dl_slots: 4,
dl_symbols: 0,
ul_symbols: 0,
ul_slots: 0,
},
#elif NR_TDD_CONFIG == 10
/ only for FR2 /
pattern1: {
period: 0.625, / in ms /
dl_slots: 3,
dl_symbols: 10,
ul_slots: 1,
ul_symbols: 2,
},
#endif
},
#endif
ssb_period: 20, / in ms */
n_id_cell: 500,

plmn_list: [ {
  tac: 100,
  plmn: "00101",
  reserved: false,
  nssai: [
    {
     sst: 1,
    },
    /*{
     sst: 2,
    },
    {
     sst: 3,
     sd: 50,
    },*/
   ],
  },
],

/*sib_sched_list: [
  {
    filename: "sib2_nr.asn",
    si_periodicity: 16,
  },
  {
    filename: "sib3_nr.asn",
    si_periodicity: 16,
  },
  {
    filename: "sib4_nr.asn",
    si_periodicity: 32,
  },
],
sib9: {
  si_periodicity: 32
},*/
si_window_length: 40,

cell_barred: false,
intra_freq_reselection: true,
q_rx_lev_min: -70,
q_qual_min: -20,
//p_max: 10, /* dBm */

root_sequence_index: 1, /* PRACH root sequence index */

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

dmrs_type_a_pos: 2,

/* to limit the number of HARQ feedback in UL, use pdsch_harq_ack_max;
   allows to workaround issues with SM-G977N for example */
//pdsch_harq_ack_max: 2,

prach: {

#if NR_TDD == 1
#if FR2
prach_config_index: 149, /* format C0, every 4 frames /
msg1_subcarrier_spacing: 120, / kHz /
#else
#if NR_TDD_CONFIG == 4
prach_config_index: 156, / format B4, subframe 2 /
#else
prach_config_index: 160, / format B4, subframe 9 /
#endif
msg1_subcarrier_spacing: 30, / kHz /
#endif
#else
prach_config_index: 16, / subframe 1 every frame /
#endif
msg1_fdm: 1,
msg1_frequency_start: -1,
zero_correlation_zone_config: 15,
preamble_received_target_power: -110, / in dBm /
preamble_trans_max: 7,
power_ramping_step: 4, / in dB /
#if FR2 == 1
ra_response_window: 40, / in slots /
#elif NR_TDD == 1
ra_response_window: 20, / in slots /
#else
ra_response_window: 10, / in slots /
#endif
restricted_set_config: "unrestricted_set",
ra_contention_resolution_timer: 64, / in ms */
ssb_per_prach_occasion: 1,
cb_preambles_per_ssb: 8,
},

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: [ 0, 4, 0, 0, 0 ],
    dci_0_1_and_1_1: true,
  },
  al_index: 1,
},

#if FR2
k_min: 8,
#endif
pdsch: {
mapping_type: "typeA",
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",
rar_mcs: 2,
si_mcs: 6,
/ If defined, force the PDSCH MCS for all UEs. Otherwise it is computed
* based on DL channel quality estimation /
/ mcs: 24, */
},

csi_rs: {
  resource_auto: {
    nzp_csi_rs_period: 80,

#if FR2
trs_presence: false,
#endif
},
csi_report_config: [
{
report_config_type: "periodic",
period: 80,
},
],
},

pucch: {
  pucch_group_hopping: "neither",
  hopping_id: -1, /* -1 = n_cell_id */
  p0_nominal: -96,

#if 0
pucch0: {
initial_cyclic_shift: 1,
n_symb: 1,
},
#else
pucch1: {
n_cs: 3,
n_occ: 3,
freq_hopping: true,
#if USE_SRS && NR_TDD == 0
n_symb: 12,
#endif
},
#endif
#if NR_LONG_PUCCH_FORMAT == 2
pucch2: {
n_symb: 2,
n_prb: 1,
freq_hopping: true,
simultaneous_harq_ack_csi: false,
max_code_rate: 0.25,
},
#elif NR_LONG_PUCCH_FORMAT == 3
pucch3: {
bpsk: false,
additional_dmrs: false,
freq_hopping: true,
n_prb: 1,
simultaneous_harq_ack_csi: true,
max_code_rate: 0.25,
},
#elif NR_LONG_PUCCH_FORMAT == 4
pucch4: {
occ_len: 4,
bpsk: false,
additional_dmrs: false,
freq_hopping: true,
simultaneous_harq_ack_csi: true,
max_code_rate: 0.25,
},
#endif
},

#if USE_SRS
srs: {
resource_auto: {
codebook: {
resource_type: "periodic",
period: 80, /* in slots */
}
}
},
#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,

#if USE_SRS
max_rank: N_ANTENNA_UL,
#endif

  /* 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],

inactivity_timer: 10000,

drb_config: "drb_nr.cfg",

},
}
---------------------------------------------------------------------------------------------end----------------------------------------------------------------------------------

srsUE never get connected with the Amarisoft Callbox Pro gNB. I am also attaching all the log files as well. Please let me know if anyone can help me with this issue. Thank you.

srsue.log
amari_gnb0.log
amari_ims.log
amari_lte.log
amari_mbmsgw.log
amari_mme.log

[andrepuschmann]

Hi @fahad-ece - quick reminder to format the message correctly. Right now it's really difficult to read the text. Looking at the UE log it seems there is no cell at all or the log is cut. In any case check that you have the gNB radiating a cell and then try check frequencies match etc.

[fahad-ece]

Dear Andre, @andrepuschmann

Thanks a lot for your valuable feedback. The gNB is working fine if you have a look into the log file which was attached earlier. We have already tested the gNB with COTS UE and it was connected immediately. But whenever we tried "srsUE" it failed. I am attaching all the screenshots rather then text for your kind reference. Please have a look an let us know your valuable feedback. Thank you.

-------------------------------------------------### gNB Trace & Cell Info -------------------------------------------------------------

-----------------------------------------------------### COTS UE Status----------------------------------------------------------------

--------------------------------------------------------### srsUE Status----------------------------------------------------------------

[helloTkk]

Hi @fahad-ece, did you successfully connect srsUE to Amarisoft gNodeB?