/******************************************************************************* OpenAirInterface Copyright(c) 1999 - 2014 Eurecom OpenAirInterface is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. OpenAirInterface is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenAirInterface.The full GNU General Public License is included in this distribution in the file called "COPYING". If not, see <http://www.gnu.org/licenses/>. Contact Information OpenAirInterface Admin: openair_admin@eurecom.fr OpenAirInterface Tech : openair_tech@eurecom.fr OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE *******************************************************************************/ /*! \file srs_pc.c * \brief Implementation of UE SRS Power Control procedures from 36.213 LTE specifications (Section * \author H. Bilel * \date 2016 * \version 0.1 * \company TCL * \email: haithem.bilel@alcatelOneTouch.com * \note * \warning */ #include "PHY/defs.h" #include "PHY/LTE_TRANSPORT/proto.h" #include "PHY/extern.h" void srs_power_cntl(PHY_VARS_UE *ue,UE_rxtx_proc_t *proc,uint8_t eNB_id,uint8_t *pnb_rb_srs, uint8_t abstraction_flag) { int16_t PL; int8_t p0_NominalPUSCH; int8_t p0_UE_PUSCH; int8_t Psrs_offset; int16_t P_srs; int16_t f_pusch; uint8_t alpha; uint8_t Msrs = 0; SOUNDINGRS_UL_CONFIG_DEDICATED *psoundingrs_ul_config_dedicated = &ue->soundingrs_ul_config_dedicated[eNB_id]; LTE_DL_FRAME_PARMS *pframe_parms = &ue->frame_parms; uint8_t Bsrs = psoundingrs_ul_config_dedicated->srs_Bandwidth; uint8_t Csrs = pframe_parms->soundingrs_ul_config_common.srs_BandwidthConfig; LOG_D(PHY," SRS Power Control; AbsSubframe %d.%d, eNB_id %d, N_RB_UL %d, srs_Bandwidth %d, srs_BandwidthConfig %d \n",proc->frame_tx,proc->subframe_tx,eNB_id,pframe_parms->N_RB_UL,Bsrs,Csrs); if (pframe_parms->N_RB_UL < 41) { Msrs = Nb_6_40[Csrs][Bsrs]; } else if (pframe_parms->N_RB_UL < 61) { Msrs = Nb_41_60[Csrs][Bsrs]; } else if (pframe_parms->N_RB_UL < 81) { Msrs = Nb_61_80[Csrs][Bsrs]; } else if (pframe_parms->N_RB_UL <111) { Msrs = Nb_81_110[Csrs][Bsrs]; } // SRS Power control 36.213 5.1.3.1 // P_srs = P_srs_offset+ 10log10(Msrs) + P_opusch(j) + alpha*PL + f(i)) p0_NominalPUSCH = ue->frame_parms.ul_power_control_config_common.p0_NominalPUSCH; p0_UE_PUSCH = ue->ul_power_control_dedicated[eNB_id].p0_UE_PUSCH; Psrs_offset = (ue->ul_power_control_dedicated[eNB_id].pSRS_Offset - 3); f_pusch = ue->ulsch[eNB_id]->f_pusch; alpha = alpha_lut[ue->frame_parms.ul_power_control_config_common.alpha]; PL = get_PL(ue->Mod_id,ue->CC_id,eNB_id); LOG_D(PHY," SRS Power Control; eNB_id %d, p0_NominalPUSCH %d, p0_UE_PUSCH %d, alpha %d \n",eNB_id,p0_NominalPUSCH,p0_UE_PUSCH,alpha); LOG_D(PHY," SRS Power Control; eNB_id %d, pSRS_Offset[dB] %d, Msrs %d, PL %d, f_pusch %d \n",eNB_id,Psrs_offset,Msrs,PL,f_pusch); P_srs = (p0_NominalPUSCH + p0_UE_PUSCH) + Psrs_offset + f_pusch; P_srs += (((int32_t)alpha * (int32_t)PL) + hundred_times_log10_NPRB[Msrs-1])/100 ; ue->ulsch[eNB_id]->Po_SRS = P_srs; if(ue->ulsch[eNB_id]->Po_SRS > ue->tx_power_max_dBm) { ue->ulsch[eNB_id]->Po_SRS = ue->tx_power_max_dBm; } pnb_rb_srs[0] = Msrs; LOG_D(PHY," SRS Power Control; eNB_id %d, Psrs_pc[dBm] %d, Pcmax[dBm] %d, Psrs[dBm] %d\n",eNB_id,P_srs,ue->tx_power_max_dBm,ue->ulsch[eNB_id]->Po_SRS); }