eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset/=16;//for 25RB only I guess
eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset/=16;//T_A = N_TA/16, where N_TA should be on a 30.72Msps
rar[0]=(uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset>>(2+4));// 7 MSBs of timing advance + divide by 4
rar[1]=(uint8_t)(eNB_mac_inst[module_idP].common_channels[CC_id].RA_template[ra_idx].timing_offset<<(4-2))&0xf0;// 4 LSBs of timing advance + divide by 4
rballoc=mac_xface->computeRIV(N_RB_UL,1,1);// first PRB only for UL Grant