103 lines
3.9 KiB
C
103 lines
3.9 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*! \file srs_pc.c
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* \brief Implementation of UE SRS Power Control procedures from 36.213 LTE specifications (Section
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* \author H. Bilel
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* \date 2016
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* \version 0.1
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* \company TCL
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* \email: haithem.bilel@alcatelOneTouch.com
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* \note
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* \warning
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*/
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#include "PHY/defs_UE.h"
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#include "PHY/LTE_UE_TRANSPORT/transport_proto_ue.h"
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#include "PHY/phy_extern_ue.h"
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#include "PHY/LTE_ESTIMATION/lte_estimation.h"
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#include "openair1/SCHED/sched_common_extern.h"
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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)
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{
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int16_t PL;
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int8_t p0_NominalPUSCH;
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int8_t p0_UE_PUSCH;
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int8_t Psrs_offset;
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int16_t P_srs;
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int16_t f_pusch;
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uint8_t alpha;
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uint8_t Msrs = 0;
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SOUNDINGRS_UL_CONFIG_DEDICATED *psoundingrs_ul_config_dedicated = &ue->soundingrs_ul_config_dedicated[eNB_id];
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LTE_DL_FRAME_PARMS *pframe_parms = &ue->frame_parms;
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uint8_t Bsrs = psoundingrs_ul_config_dedicated->srs_Bandwidth;
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uint8_t Csrs = pframe_parms->soundingrs_ul_config_common.srs_BandwidthConfig;
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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);
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if (pframe_parms->N_RB_UL < 41)
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{
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Msrs = Nb_6_40[Csrs][Bsrs];
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}
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else if (pframe_parms->N_RB_UL < 61)
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{
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Msrs = Nb_41_60[Csrs][Bsrs];
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}
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else if (pframe_parms->N_RB_UL < 81)
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{
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Msrs = Nb_61_80[Csrs][Bsrs];
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}
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else if (pframe_parms->N_RB_UL <111)
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{
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Msrs = Nb_81_110[Csrs][Bsrs];
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}
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// SRS Power control 36.213 5.1.3.1
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// P_srs = P_srs_offset+ 10log10(Msrs) + P_opusch(j) + alpha*PL + f(i))
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p0_NominalPUSCH = ue->frame_parms.ul_power_control_config_common.p0_NominalPUSCH;
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p0_UE_PUSCH = ue->ul_power_control_dedicated[eNB_id].p0_UE_PUSCH;
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Psrs_offset = (ue->ul_power_control_dedicated[eNB_id].pSRS_Offset - 3);
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f_pusch = ue->ulsch[eNB_id]->f_pusch;
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alpha = alpha_lut[ue->frame_parms.ul_power_control_config_common.alpha];
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PL = get_PL(ue->Mod_id,ue->CC_id,eNB_id);
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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);
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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);
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P_srs = (p0_NominalPUSCH + p0_UE_PUSCH) + Psrs_offset + f_pusch;
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P_srs += (((int32_t)alpha * (int32_t)PL) + hundred_times_log10_NPRB[Msrs-1])/100 ;
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ue->ulsch[eNB_id]->Po_SRS = P_srs;
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if(ue->ulsch[eNB_id]->Po_SRS > ue->tx_power_max_dBm)
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{
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ue->ulsch[eNB_id]->Po_SRS = ue->tx_power_max_dBm;
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}
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pnb_rb_srs[0] = Msrs;
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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);
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}
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