/******************************************************************************* ################################################################################ # Copyright (c) [2017-2019] [Radisys] # # # # Licensed under the Apache License, Version 2.0 (the "License"); # # you may not use this file except in compliance with the License. # # You may obtain a copy of the License at # # # # http://www.apache.org/licenses/LICENSE-2.0 # # # # Unless required by applicable law or agreed to in writing, software # # distributed under the License is distributed on an "AS IS" BASIS, # # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # # See the License for the specific language governing permissions and # # limitations under the License. # ################################################################################ *******************************************************************************/ /************************************************************************ Name: sch_rach.c Type: C source file Desc: C source code for rach handling functions File: sch_rach.c **********************************************************************/ /** @file sch_rach.c @brief This file implements the rach handling. */ #include "common_def.h" #include "tfu.h" #include "lrg.h" #include "tfu.x" #include "lrg.x" #include "du_log.h" #include "du_app_mac_inf.h" #include "mac_sch_interface.h" #include "sch.h" #include "sch_utils.h" extern SchCb schCb[SCH_MAX_INST]; extern uint8_t puschDeltaTable[MAX_MU_PUSCH]; /** * @brief calculate ra-rnti function. * * @details * * Function : calculateRaRnti * * This function calculates ra-rnti * * @param[in] symbol index * @param[in] slot index * @param[in] frequency index * @return ra-rnti **/ uint16_t calculateRaRnti(uint8_t symbolIdx, uint8_t slotIdx, uint8_t freqIdx) { uint16_t raRnti = 0; uint8_t ulCarrierIdx = 0; /* configured to 0 */ raRnti = (1+symbolIdx+(14*slotIdx)+(14*80*freqIdx)+(14*80*8*ulCarrierIdx)); return raRnti; } /** * @brief create raCb function. * * @details * * Function : createSchRaCb * * This function create raCb * * @param[in] tcrnti * @param[in] shed instance * @return void **/ void createSchRaCb(uint16_t tcrnti, Inst schInst) { schCb[schInst].cells[schInst]->raCb[0].tcrnti = tcrnti; } /** * @brief resource allocation for msg3 PUSCH * * @details * * Function : schAllocMsg3Pusch * * This function handles msg3 PUSCH allocation * * @param[in] Inst schInst, SCH instance * @param[in] slot, current slot * @param[out] msg3StartRb * @param[out] msg3NumRb * @return void **/ uint8_t schAllocMsg3Pusch(Inst schInst, uint16_t slot, uint16_t *msg3StartRb, uint8_t *msg3NumRb) { SchCellCb *cell = NULLP; SchUlSlotInfo *schUlSlotInfo = NULLP; uint8_t puschMu = 0; uint8_t msg3SlotAlloc = 0; uint8_t delta = 0; uint8_t k2 = 0; uint8_t startSymb = 0; uint8_t symbLen = 0; uint8_t startRb = 0; uint8_t numRb = 0; uint8_t idx = 0; cell = schCb[schInst].cells[schInst]; // puschMu = cell->cellCfg.puschMu; delta = puschDeltaTable[puschMu]; k2 = cell->cellCfg.schInitialUlBwp.puschCommon.k2; startSymb = cell->cellCfg.schInitialUlBwp.puschCommon.startSymbol; symbLen = cell->cellCfg.schInitialUlBwp.puschCommon.lengthSymbol; /* Slot allocation for msg3 based on 38.214 section 6.1.2.1 */ msg3SlotAlloc = slot + k2 + delta; msg3SlotAlloc = msg3SlotAlloc % SCH_NUM_SLOTS; startRb = PUSCH_START_RB; /* formula used for calculation of rbSize, 38.214 section 6.1.4.2 * Ninfo = S.Nre.R.Qm.v * Nre' = Nsc.NsymPdsch-NdmrsSymb-Noh * Nre = min(156,Nre').nPrb */ numRb = 1; /* based on above calculation */ /* allocating 1 extra RB for now */ numRb++; for(idx=startSymb; idxschUlSlotInfo[msg3SlotAlloc]->assignedPrb[idx] = startRb + numRb; } schUlSlotInfo = cell->schUlSlotInfo[msg3SlotAlloc]; SCH_ALLOC(schUlSlotInfo->schPuschInfo, sizeof(SchPuschInfo)); if(!schUlSlotInfo->schPuschInfo) { DU_LOG("SCH: Memory allocation failed in schAllocMsg3Pusch"); return RFAILED; } schUlSlotInfo->schPuschInfo->harqProcId = SCH_HARQ_PROC_ID; schUlSlotInfo->schPuschInfo->resAllocType = SCH_ALLOC_TYPE_1; schUlSlotInfo->schPuschInfo->fdAlloc.startPrb = startRb; schUlSlotInfo->schPuschInfo->fdAlloc.numPrb = numRb; schUlSlotInfo->schPuschInfo->tdAlloc.startSymb = startSymb; schUlSlotInfo->schPuschInfo->tdAlloc.numSymb = symbLen; schUlSlotInfo->schPuschInfo->tbInfo.mcs = 4; schUlSlotInfo->schPuschInfo->tbInfo.ndi = 1; /* new transmission */ schUlSlotInfo->schPuschInfo->tbInfo.rv = 0; schUlSlotInfo->schPuschInfo->tbInfo.tbSize = 24; /*Considering 2 PRBs */ schUlSlotInfo->schPuschInfo->dmrsMappingType = DMRS_MAP_TYPE_A; /* Setting Type-A */ schUlSlotInfo->schPuschInfo->nrOfDmrsSymbols = NUM_DMRS_SYMBOLS; schUlSlotInfo->schPuschInfo->dmrsAddPos = DMRS_ADDITIONAL_POS; *msg3StartRb = startRb; *msg3NumRb = numRb; return ROK; } /** * @brief process rach indication function. * * @details * * Function : schProcessRachInd * * This function process rach indication * * @param[in] rachInd parameters * @param[in] shed instance * @return ROK **/ uint8_t schProcessRachInd(RachIndInfo *rachInd, Inst schInst) { SchCellCb *cell = schCb[schInst].cells[schInst]; RarInfo *rarInfo = NULLP; uint16_t raRnti = 0; uint16_t rarSlot = 0; uint16_t msg3StartRb; uint8_t msg3NumRb; uint8_t ret = ROK; /* RAR will sent with a delay of RAR_DELAY */ rarSlot = (rachInd->timingInfo.slot+RAR_DELAY+PHY_DELTA)%SCH_NUM_SLOTS; SchDlSlotInfo *schDlSlotInfo = cell->schDlSlotInfo[rarSlot]; /* RAR will sent in the next slot */ /* Allocate the rarInfo, this pointer will be checked at schProcessSlotInd function */ SCH_ALLOC(rarInfo, sizeof(RarInfo)); if(rarInfo == NULLP) { DU_LOG("\nMAC: Memory Allocation failed for rarInfo"); return RFAILED; } schDlSlotInfo->rarInfo = rarInfo; /* calculate the ra-rnti value */ raRnti = calculateRaRnti(rachInd->symbolIdx,rachInd->slotIdx,rachInd->freqIdx); /* create raCb at SCH */ createSchRaCb(rachInd->crnti,schInst); /* allocate resources for msg3 */ ret = schAllocMsg3Pusch(schInst, rarSlot, &msg3StartRb, &msg3NumRb); if(ret == ROK) { /* fill RAR info */ rarInfo->raRnti = raRnti; rarInfo->tcrnti = rachInd->crnti; rarInfo->RAPID = rachInd->preambleIdx; rarInfo->ta = rachInd->timingAdv; rarInfo->msg3FreqAlloc.startPrb = msg3StartRb; rarInfo->msg3FreqAlloc.numPrb = msg3NumRb; } return ret; } /** * @brief fill RAR info function. * * @details * * Function : calculateRaRnti * * This function fills pdcch and pdsch info for RAR * * @param[in] rar Allocation info * @param[in] ra-rnti * @param[in] PCI * @param[in] offset to pointA to determine freq alloc * @return ROK **/ uint8_t schFillRar(RarAlloc *rarAlloc, uint16_t raRnti, uint16_t pci, uint8_t offsetPointA) { Inst inst = 0; uint8_t coreset0Idx = 0; uint8_t numRbs = 0; uint8_t firstSymbol = 0; uint8_t numSymbols = 0; uint8_t offset = 0; uint8_t FreqDomainResource[6] = {0}; uint16_t tbSize = 0; uint8_t numPdschSymbols = 12; /* considering pdsch region from 2 to 13 */ uint8_t mcs = 4; /* MCS fixed to 4 */ SchBwpDlCfg *initialBwp = &schCb[inst].cells[inst]->cellCfg.schInitialDlBwp; PdcchCfg *pdcch = &rarAlloc->rarPdcchCfg; PdschCfg *pdsch = &rarAlloc->rarPdschCfg; BwpCfg *bwp = &rarAlloc->bwp; coreset0Idx = initialBwp->pdcchCommon.commonSearchSpace.coresetId; /* derive the sib1 coreset0 params from table 13-1 spec 38.213 */ numRbs = coresetIdxTable[coreset0Idx][1]; numSymbols = coresetIdxTable[coreset0Idx][2]; offset = coresetIdxTable[coreset0Idx][3]; /* calculate time domain parameters */ // note: since slot value is made sl1, RAR can be sent at all slots uint16_t mask = 0x2000; for(firstSymbol=0; firstSymbol<14;firstSymbol++) { if(initialBwp->pdcchCommon.commonSearchSpace.monitoringSymbol & mask) break; else mask = mask>>1; } /* calculate the PRBs */ schAllocFreqDomRscType0(((offsetPointA-offset)/6), (numRbs/6), FreqDomainResource); /* fill BWP */ bwp->freqAlloc.numPrb = initialBwp->bwp.freqAlloc.numPrb; bwp->freqAlloc.startPrb = initialBwp->bwp.freqAlloc.startPrb; bwp->subcarrierSpacing = initialBwp->bwp.scs; bwp->cyclicPrefix = initialBwp->bwp.cyclicPrefix; /* fill the PDCCH PDU */ pdcch->coreset0Cfg.startSymbolIndex = firstSymbol; pdcch->coreset0Cfg.durationSymbols = numSymbols; memcpy(pdcch->coreset0Cfg.freqDomainResource,FreqDomainResource,6); pdcch->coreset0Cfg.cceRegMappingType = 1; /* coreset0 is always interleaved */ pdcch->coreset0Cfg.regBundleSize = 6; /* spec-38.211 sec 7.3.2.2 */ pdcch->coreset0Cfg.interleaverSize = 2; /* spec-38.211 sec 7.3.2.2 */ pdcch->coreset0Cfg.coreSetType = 0; pdcch->coreset0Cfg.shiftIndex = pci; pdcch->coreset0Cfg.precoderGranularity = 0; /* sameAsRegBundle */ pdcch->numDlDci = 1; pdcch->dci.rnti = raRnti; /* RA-RNTI */ pdcch->dci.scramblingId = pci; pdcch->dci.scramblingRnti = 0; pdcch->dci.cceIndex = 4; /* considering SIB1 is sent at cce 0-1-2-3 */ pdcch->dci.aggregLevel = 4; pdcch->dci.beamPdcchInfo.numPrgs = 1; pdcch->dci.beamPdcchInfo.prgSize = 1; pdcch->dci.beamPdcchInfo.digBfInterfaces = 0; pdcch->dci.beamPdcchInfo.prg[0].pmIdx = 0; pdcch->dci.beamPdcchInfo.prg[0].beamIdx[0] = 0; pdcch->dci.txPdcchPower.powerValue = 0; pdcch->dci.txPdcchPower.powerControlOffsetSS = 0; pdcch->dci.pdschCfg = pdsch; /* fill the PDSCH PDU */ uint8_t cwCount = 0; pdsch->pduBitmap = 0; /* PTRS and CBG params are excluded */ pdsch->rnti = raRnti; /* RA-RNTI */ pdsch->pduIndex = 0; pdsch->numCodewords = 1; for(cwCount = 0; cwCount < pdsch->numCodewords; cwCount++) { pdsch->codeword[cwCount].targetCodeRate = 308; pdsch->codeword[cwCount].qamModOrder = 2; pdsch->codeword[cwCount].mcsIndex = mcs; /* mcs configured to 4 */ pdsch->codeword[cwCount].mcsTable = 0; /* notqam256 */ pdsch->codeword[cwCount].rvIndex = 0; tbSize = schCalcTbSize(10); /* 8 bytes RAR and 2 bytes padding */ pdsch->codeword[cwCount].tbSize = tbSize; } pdsch->dataScramblingId = pci; pdsch->numLayers = 1; pdsch->transmissionScheme = 0; pdsch->refPoint = 0; pdsch->dmrs.dlDmrsSymbPos = 2; pdsch->dmrs.dmrsConfigType = 0; /* type-1 */ pdsch->dmrs.dlDmrsScramblingId = pci; pdsch->dmrs.scid = 0; pdsch->dmrs.numDmrsCdmGrpsNoData = 1; pdsch->dmrs.dmrsPorts = 0; pdsch->dmrs.mappingType = DMRS_MAP_TYPE_A; /* Type-A */ pdsch->dmrs.nrOfDmrsSymbols = NUM_DMRS_SYMBOLS; pdsch->dmrs.dmrsAddPos = DMRS_ADDITIONAL_POS; pdsch->pdschFreqAlloc.resourceAllocType = 1; /* RAT type-1 RIV format */ pdsch->pdschFreqAlloc.freqAlloc.startPrb = offset + SCH_SSB_NUM_PRB; /* the RB numbering starts from coreset0, and PDSCH is always above SSB */ pdsch->pdschFreqAlloc.freqAlloc.numPrb = schCalcNumPrb(tbSize,mcs,numPdschSymbols); pdsch->pdschFreqAlloc.vrbPrbMapping = 0; /* non-interleaved */ pdsch->pdschTimeAlloc.timeAlloc.startSymb = initialBwp->pdschCommon.startSymbol; pdsch->pdschTimeAlloc.timeAlloc.numSymb = initialBwp->pdschCommon.lengthSymbol; pdsch->beamPdschInfo.numPrgs = 1; pdsch->beamPdschInfo.prgSize = 1; pdsch->beamPdschInfo.digBfInterfaces = 0; pdsch->beamPdschInfo.prg[0].pmIdx = 0; pdsch->beamPdschInfo.prg[0].beamIdx[0] = 0; pdsch->txPdschPower.powerControlOffset = 0; pdsch->txPdschPower.powerControlOffsetSS = 0; return ROK; } /********************************************************************** End of file **********************************************************************/