Nakrop Jinaporn

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Viewing 6 posts - 1 through 6 (of 6 total)
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  • #7899
    Nakrop Jinaporn
    Participant

    Dear Martin,

    Thanks for your support. My first point is to compare the default (Reuse-1) scheduling with the Reuse-1 from FFR setting. The same results could be obtained. The configuration is summarised as follows:

    LTE_config.simulation_time_tti = 50;
    LTE_config.bandwidth = 20e6;
    LTE_config.nr_eNodeB_rings = 2;
    LTE_config.UE_per_eNodeB = 30;

    LTE_config.nTX = 4;
    LTE_config.nRX = 4;

    LTE_config.macroscopic_pathloss_model = ‘TS36942’;
    LTE_config.shadow_fading_type = ‘none’;
    LTE_config.antenna_gain_pattern = ‘kathreinTSAntenna’;
    LTE_config.antenna.electrical_downtilt = 8;

    LTE_config.scheduler = ‘FFR’;
    LTE_config.scheduler_params.FR_scheduler.scheduler = ’round robin’;
    LTE_config.scheduler_params.PR_scheduler.scheduler = ’round robin’;

    LTE_config.FFR_params.beta_FR = 1;
    LTE_config.FFR_params.SINR_threshold_value = -2;
    % Minimum threshold point at cell edge

    There was error as follows:

    TTI 1/50: +++++*****Operands to the || and && operators must be convertible to logical scalar
    values.

    Error in network_elements.UE/set_SINRs_according_to_schedule (line 568)
    if DL_signaling.num_assigned_RBs>0 && ~obj.deactivate_UE

    Error in LTE_sim_main (line 466)
    UEs(u_).set_SINRs_according_to_schedule

    Another point is that edge throughput with a specific FFR setting (e.g., beta_FR = 0.75 and SINR_threshold_value = 12.75 dB) was significantly lower than the case without FFR (LTE_config.scheduler = ’round robin’). To the best of my knowledge, the edge throughput could be improved by FFR.

    Can we set beta_FR = 0.01 and SINR_threshold_value = -2 dB (Minimum threshold point at cell edge) to analyse Reuse-3 in the Vienna simulator?

    Thanks and best wishes,
    Nakrop

    #7898
    Nakrop Jinaporn
    Participant

    Dear Martin,

    Thanks for your support. MATLAB R2016a was used for the Vienna simulator.

    Nakrop

    #7856
    Nakrop Jinaporn
    Participant

    Hi Naser,

    I have the same problem when running with V2.

    I want to share another point. Can we examine the REUSE-1 by the Vienna simulator.

    FFR parameters are fixed as follows:

    LTE_config.FFR_params.beta_FR = 1;
    LTE_config.FFR_params.SINR_threshold_value = -2;
    (a minimum SINR threshold point)

    I got the errors:

    TTI 1/50: +++++*****Operands to the || and && operators must be convertible to logical scalar values.

    Error in network_elements.UE/set_SINRs_according_to_schedule (line 568)
    if DL_signaling.num_assigned_RBs>0 && ~obj.deactivate_UE

    Error in LTE_sim_main (line 466)
    UEs(u_).set_SINRs_according_to_schedule

    #7855
    Nakrop Jinaporn
    Participant

    Hi Kai Chang,

    From the link-to-system model, we can obtain the throughput as follows:

    1) The subcarrier (post-equalization) SINR vector is obtained from the Link Quality Model.

    2) In the Link Performance Model, this vector is compressed into a single effective SINR

    3) This effective SINR is mapped into a single BLER by AWGN SNR-to-BLER curves from link level simulation.

    4) This BLER is combined with the TB size resulting in the throughput.

    For the calculation in the Vienna simulator, we can check the function calculate_final_average_throughput_Mbps in ueTrace.m

    I hope this can help.

    Regards,
    NJ

    #7642
    Nakrop Jinaporn
    Participant

    Hi Martin. Thanks for your support.

    #7589
    Nakrop Jinaporn
    Participant

    Hi Fjolla. Thanks for your help.

Viewing 6 posts - 1 through 6 (of 6 total)