function RU_index = RU_alloc(cfgUI)
if cfgUI.numUsers == 1 
    f_occupy = strcat(num2str((cfgUI.user1.f)'));
    switch f_occupy.'
        case '1111'
            RU_index = 192;%  空分
        case '1100'
            RU_index = 96;% 106 频分
        case '0011'
            RU_index = 96;% 242 空分
        case '1000'
            RU_index = 112;% 52 频分
        case '0100'
            RU_index = 112;% 52 频分
        case  '0010'
            RU_index = 112;% 52 频分
        case  '0001'
            RU_index = 112;% 52 频分
        otherwise
            RU_index = 192;
    end
    RU_index = 192; % 为保证代码正常运行的权宜之计
elseif cfgUI.numUsers == 2  
    f_occupy = strcat(num2str((cfgUI.user1.f + cfgUI.user2.f)'));
    switch f_occupy.'
        case '2222'
            RU_index = 193;% 242 空分
        case '1111'
            RU_index = 96;% 106 频分
        case '2200'
            RU_index = 100;% 242 空分
        case '0022'
            RU_index = 97;% 52 频分
        case '1110'
            RU_index = 24;% 52 频分
        case  '1101'
            RU_index = 24;% 52 频分
        case  '0011'
            RU_index = 24;% 52 频分
        case '1011'
            RU_index = 16;% 52 空分
        case '0111'
            RU_index = 16;% 52 频分
        case '1100'
            RU_index = 16;% 3用户，前106空分
        case  '1001'
            RU_index = 112;% 52 频分
        case '1010'
            RU_index = 112;% 52 空分
        case '0101'
            RU_index = 112;% 52 频分
        case '0110'
            RU_index = 112;% 3用户，前106空分
        otherwise
            RU_index = 193;
    end
    RU_index = 193; % 为保证代码正常运行的权宜之计
end
end