• https://handbook.rapid.space/rapidspace-Presentation.Scaling.Partnership.Inside?portal_skin=Slide
• https://lab.nexedi.com/nexedi/ors-hardware

Rapid.Space is now looking for a partner to design or co-design a new radio system plat that can be produced in China and also abroad (Europe, Thailand, USA, etc.). The code name for this new product is "PRS" for "Power Radio Station".

We prefer open source licensing but this is not required. We are OK for pay for software license either per unit, flat fee or a combination.

Goal: CPRI HW&SW lock

Configure frequency (dl_earfcn), bandwidth (N_RB_DL), antennas(N_ANTENNA_DL, N_ANTENNA_UL), CPRI line rate (cpri_mult) and launch it to confirm HW and SW lock

User Plane

Goal: UE attached

Configure delay parameter (cpri_rx_delay,cpri_tx_delay)

• cpri_rx_delay = T2a + Ta3 - Toffset
• cpri_tx_delay = T12 + T2a

Here is an example from Lopcomm's RU: https://handbook.rapid.space/user/rapidspace-Lopcomm.RRH.Delay.Management.CPRI.Delay 

Try to attach UE.

4TR-20MHz-B7 enb.cfg reference:
 

#define TDD 0#define N_RB_DL 100#define N_ANTENNA_DL 4#define N_ANTENNA_UL 4{ //log_options: "all.level=error,all.max_size=0,nas.level=debug,nas.max_size=1,s1ap.level=debug,s1ap.max_size=1,x2ap.level=debug,x2ap.max_size=1,rrc.level=debug,rrc.max_size=1,phy.level=info,file.rotate=1G,file.path=/dev/null",// log_options: "all.level=warn,phy.level=debug,phy.max_size=1,rrc.level=debug,rrc.max_size=1", log_options: "all.level=error,rrc.max_size=1", log_filename: "/tmp/enb0.log", rf_driver: { name: "sdr", args: "dev0=/dev/sdr0@0", cpri_mapping: "hw", cpri_mult: "16", cpri_rx_delay: "25.47", cpri_tx_delay: "14.71", cpri_tx_dbm: "54", cpri_debug: 2, ifname: "cpri0", }, tx_gain: 0, rx_gain: 0, com_addr: "127.0.1.2:9001", mme_list: [ { mme_addr: "192.168.9.100", }, ], gtp_addr: "192.168.9.7", enb_id: 0x1A2D0, cell_list: [{ rf_port: 0, cell_id: 0x00, tac: 0x0001, n_id_cell: 0, root_sequence_index: 204, dl_earfcn: 3100, scell_list: [ ], } ], cell_default: { plmn_list: [{ plmn: "00101", reserved: false, attach_without_pdn: false, } ], n_antenna_dl: N_ANTENNA_DL, n_antenna_ul: N_ANTENNA_UL,#if TDD == 1 uldl_config: 2, sp_config: 7,#endif n_rb_dl: N_RB_DL, cyclic_prefix: "normal", phich_duration: "normal", phich_resource: "1", si_value_tag: 0, cell_barred: false, intra_freq_reselection: true, q_rx_lev_min: -70, p_max: 17, si_window_length: 40, sib_sched_list: [ { filename: "sib2_3.asn", si_periodicity: 16, }, ],#if N_RB_DL == 6 si_coderate: 0.30,#else si_coderate: 0.20,#endif si_pdcch_format: 2, n_symb_cch: 0, 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, },#if N_RB_DL == 6 pdcch_format: 1,#else pdcch_format: 2,#endif#if N_RB_DL == 6 prach_config_index: 15,#else prach_config_index: 4,#endif prach_freq_offset: -1, pucch_dedicated: { n1_pucch_sr_count: 11, cqi_pucch_n_rb: 1,#if TDD == 1 tdd_ack_nack_feedback_mode: "multiplexing", /* TDD only */#endif }, pusch_dedicated: { beta_offset_ack_index: 9, beta_offset_ri_index: 6, beta_offset_cqi_index: 6, }, pusch_hopping_offset: -1, pusch_msg3_mcs: 0,#if N_RB_DL == 6 initial_cqi: 5,#else initial_cqi: 3,#endif dl_256qam: true, ul_64qam: true, sr_period: 20, cqi_period: 40,#if N_ANTENNA_DL >= 2 m_ri: 8, transmission_mode: 3,#endif srs_dedicated: {#if N_RB_DL == 6 srs_bandwidth_config: 7, srs_bandwidth: 1,#elif N_RB_DL == 15 srs_bandwidth_config: 6, srs_bandwidth: 1,#elif N_RB_DL == 25 srs_bandwidth_config: 3, srs_bandwidth: 1,#elif N_RB_DL == 50 srs_bandwidth_config: 2, srs_bandwidth: 2,#elif N_RB_DL == 75 srs_bandwidth_config: 2, srs_bandwidth: 2,#else srs_bandwidth_config: 2, srs_bandwidth: 3,#endif srs_subframe_config: 3, srs_period: 40, srs_hopping_bandwidth: 0, }, mac_config: { ul_max_harq_tx: 28, dl_max_harq_tx: 28, }, pusch_max_its: 6, dpc: false, dpc_pusch_snr_target: 25, dpc_pucch_snr_target: 20, cipher_algo_pref: [], integ_algo_pref: [2, 1], inactivity_timer: 10000, srb_config: [ { id: 1, maxRetxThreshold: 32, t_Reordering: 45, t_PollRetransmit: 60, }, { id: 2 , maxRetxThreshold: 32, t_Reordering: 45, t_PollRetransmit: 60, } ], drb_config: "drb.cfg", meas_config_desc: { a1_report_type: "rsrp", a1_rsrp: -70, a1_hysteresis: 0, a1_time_to_trigger: 640, a2_report_type: "rsrp", a2_rsrp: -80, a2_hysteresis: 0, a2_time_to_trigger: 640, a3_report_type: "rsrp", a3_offset: 6, a3_hysteresis: 0, a3_time_to_trigger: 480, }, meas_gap_config: "gp0", ho_from_meas: true, },}