/******************************************************************************* ################################################################################ # 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: 5G NR SCH layer Type: C source file Desc: C source code for Entry point fucntions File: sch_common.c **********************************************************************/ /** @file sch_common.c @brief This module performs common scheduling */ #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 uint16_t prachCfgIdxTable[MAX_PRACH_CONFIG_IDX][8]; extern uint16_t numRbForPrachTable[MAX_RACH_NUM_RB_IDX][5]; extern uint8_t pucchResourceSet[MAX_PUCCH_RES_SET_IDX][4]; SchMacUlSchInfoFunc schMacUlSchInfoOpts[] = { packSchMacUlSchInfo, MacProcUlSchInfo, packSchMacUlSchInfo }; /** * @brief common resource allocation for SSB * * @details * * Function : schBroadcastAlloc * * This function handles common scheduling for DL * * @param[in] SchCellCb *cell, cell cb * @param[in] DlBrdcstAlloc *dlBrdcstAlloc, DL brdcst allocation * @return void **/ uint8_t schBroadcastAlloc(SchCellCb *cell, DlBrdcstAlloc *dlBrdcstAlloc, uint16_t slot) { /* schedule SSB */ uint8_t ssbStartPrb, ssbStartSymb, idx; SchDlSlotInfo *schDlSlotInfo; SsbInfo ssbInfo; schDlSlotInfo = cell->schDlSlotInfo[slot]; if(dlBrdcstAlloc->ssbTrans) { ssbStartPrb = cell->cellCfg.ssbSchCfg.ssbOffsetPointA; ssbStartSymb = cell->ssbStartSymbArr[dlBrdcstAlloc->ssbIdxSupported-1]; /*since we are supporting only 1 ssb beam */ /* Assign interface structure */ for(idx=0; idxssbIdxSupported; idx++) { ssbInfo.ssbIdx = idx; ssbInfo.fdAlloc.startPrb = ssbStartPrb; ssbInfo.fdAlloc.numPrb = SCH_SSB_NUM_PRB; ssbInfo.tdAlloc.startSymb = ssbStartSymb; ssbInfo.tdAlloc.numSymb = SCH_SSB_NUM_SYMB; dlBrdcstAlloc->ssbInfo[idx] = ssbInfo; schDlSlotInfo->ssbInfo[idx] = ssbInfo; } schDlSlotInfo->ssbPres = true; schDlSlotInfo->ssbIdxSupported = dlBrdcstAlloc->ssbIdxSupported; for(idx=ssbStartSymb; idxassignedPrb[idx] = ssbStartPrb + SCH_SSB_NUM_PRB + 1; /* +1 for kSsb */ } } /* SIB1 allocation */ if(dlBrdcstAlloc->sib1Trans) { schDlSlotInfo->sib1Pres = true; for(idx=0; idxassignedPrb[idx] = ssbStartPrb + SCH_SSB_NUM_PRB + 1 + 10; /* 10 PRBs for sib1 */ } memcpy(&dlBrdcstAlloc->sib1Alloc.bwp, &cell->cellCfg.sib1SchCfg.bwp, sizeof(BwpCfg)); memcpy(&dlBrdcstAlloc->sib1Alloc.sib1PdcchCfg, &cell->cellCfg.sib1SchCfg.sib1PdcchCfg, sizeof(PdcchCfg)); memcpy(&dlBrdcstAlloc->sib1Alloc.sib1PdschCfg, &cell->cellCfg.sib1SchCfg.sib1PdschCfg, sizeof(PdschCfg)); } return ROK; } /******************************************************************* * * @brief Handles sending UL scheduler info to MAC * * @details * * Function : sendUlSchInfoToMac * * Functionality: * Sends UL Sch info to MAC from SCH * * @params[in] * @return ROK - success * RFAILED - failure * * ****************************************************************/ int sendUlSchInfoToMac(UlSchedInfo *ulSchedInfo, Inst inst) { Pst pst; memset(&pst, 0, sizeof(Pst)); SCH_FILL_RSP_PST(pst, inst); pst.event = EVENT_UL_SCH_INFO; return(*schMacUlSchInfoOpts[pst.selector])(&pst, ulSchedInfo); } /** * @brief resource allocation for PRACH * * @details * * Function : schPrachResAlloc * * This function handles PRACH allocation * * @param[in] SchCellCb *cell, cell cb * @param[in] UlSchedInfo *ulSchedInfo, UL scheduling info * @return void **/ void schPrachResAlloc(SchCellCb *cell, UlSchedInfo *ulSchedInfo, SlotIndInfo prachOccasionTimingInfo) { uint8_t puschScs; uint8_t numPrachRb = 0; uint8_t numRa = 0; uint8_t freqStart = 0; uint8_t prachCfgIdx = 0; uint8_t prachFormat = 0; uint8_t x = 0; uint8_t y = 0; uint16_t prachSubframe = 0; uint8_t prachStartSymbol = 0; uint8_t prachOcas = 0; uint8_t dataType = 0; uint8_t idx = 0; SchUlSlotInfo *schUlSlotInfo = NULLP; puschScs = cell->cellCfg.schInitialUlBwp.bwp.scs; schUlSlotInfo = cell->schUlSlotInfo[prachOccasionTimingInfo.slot]; prachCfgIdx = cell->cellCfg.schRachCfg.prachCfgIdx; /* derive the prachCfgIdx table paramters */ x = prachCfgIdxTable[prachCfgIdx][1]; y = prachCfgIdxTable[prachCfgIdx][2]; prachSubframe = prachCfgIdxTable[prachCfgIdx][3]; if((prachOccasionTimingInfo.sfn%x) == y) { /* check for subFrame number */ if ((1 << prachOccasionTimingInfo.slot) & prachSubframe) { /* prach ocassion present in this subframe */ prachFormat = prachCfgIdxTable[prachCfgIdx][0]; prachStartSymbol = prachCfgIdxTable[prachCfgIdx][4]; prachOcas = prachCfgIdxTable[prachCfgIdx][6]; /* freq domain resource determination for RACH*/ freqStart = cell->cellCfg.schRachCfg.msg1FreqStart; /* numRa determined as 𝑛 belonging {0,1,.., M − 1}, * where M is given by msg1Fdm */ numRa = (cell->cellCfg.schRachCfg.msg1Fdm - 1); for(idx=0; idxcellCfg.schRachCfg.rootSeqLen) { if(numRbForPrachTable[idx][1] == cell->cellCfg.schRachCfg.prachSubcSpacing) { if(numRbForPrachTable[idx][2] == puschScs) { break; } } } } numPrachRb = numRbForPrachTable[idx][3]; dataType |= SCH_DATATYPE_PRACH; /* Considering first slot in the frame for PRACH */ idx = 0; schUlSlotInfo->assignedPrb[idx] = freqStart+numPrachRb; } ulSchedInfo->dataType = dataType; /* prach info */ ulSchedInfo->prachSchInfo.numPrachOcas = prachOcas; ulSchedInfo->prachSchInfo.prachFormat = prachFormat; ulSchedInfo->prachSchInfo.numRa = numRa; ulSchedInfo->prachSchInfo.prachStartSymb = prachStartSymbol; } } uint16_t fillPucchResourceInfo(SchPucchInfo *schPucchInfo, Inst inst) { /* derive pucchResourceSet from schCellCfg */ SchCellCb *cell = schCb[inst].cells[inst]; SchPucchCfgCmn *pucchCfg = &cell->cellCfg.schInitialUlBwp.pucchCommon; uint8_t pucchIdx = pucchCfg->pucchResourceCommon; SchBwpParams *ulBwp = &cell->cellCfg.schInitialUlBwp.bwp; schPucchInfo->fdAlloc.startPrb = ulBwp->freqAlloc.startPrb + pucchResourceSet[pucchIdx][3]; schPucchInfo->fdAlloc.numPrb = PUCCH_NUM_PRB_FORMAT_0; schPucchInfo->tdAlloc.startSymb = pucchResourceSet[pucchIdx][1]; schPucchInfo->tdAlloc.numSymb = pucchResourceSet[pucchIdx][2]; schPucchInfo->pucchFormat = pucchResourceSet[pucchIdx][0]; /* set HARQ flag to true */ schPucchInfo->harqFlag = true; schPucchInfo->numHarqBits = 1; /* 1 bit for HARQ */ /* set SR and UCI flag to false */ schPucchInfo->srFlag = false; schPucchInfo->uciFlag = false; return ROK; } /** * @brief resource allocation for UL * * @details * * Function : schUlResAlloc * * This function handles UL Resource allocation * * @param[in] SchCellCb *cell, cellCb * @return void **/ uint8_t schUlResAlloc(SchCellCb *cell, Inst schInst) { int ret = ROK; UlSchedInfo ulSchedInfo; SchUlSlotInfo *schUlSlotInfo = NULLP; SlotIndInfo ulTimingInfo; memset(&ulSchedInfo, 0, sizeof(UlSchedInfo)); /* add PHY delta */ ADD_DELTA_TO_TIME(cell->slotInfo,ulTimingInfo,PHY_DELTA+SCHED_DELTA); ulSchedInfo.cellId = cell->cellId; ulSchedInfo.slotIndInfo.sfn = ulTimingInfo.sfn; ulSchedInfo.slotIndInfo.slot = ulTimingInfo.slot; /* Schedule resources for PRACH */ schPrachResAlloc(cell, &ulSchedInfo, ulTimingInfo); schUlSlotInfo = cell->schUlSlotInfo[ulTimingInfo.slot]; if(schUlSlotInfo->schPuschInfo) { ulSchedInfo.crnti = cell->raCb[0].tcrnti; ulSchedInfo.dataType |= SCH_DATATYPE_PUSCH; memcpy(&ulSchedInfo.schPuschInfo, schUlSlotInfo->schPuschInfo, sizeof(SchPuschInfo)); SCH_FREE(schUlSlotInfo->schPuschInfo, sizeof(SchPuschInfo)); schUlSlotInfo->schPuschInfo = NULL; } if(schUlSlotInfo->pucchPres) { ulSchedInfo.dataType |= SCH_DATATYPE_UCI; fillPucchResourceInfo(&schUlSlotInfo->schPucchInfo, schInst); memcpy(&ulSchedInfo.schPucchInfo, &schUlSlotInfo->schPucchInfo, sizeof(SchPucchInfo)); memset(&schUlSlotInfo->schPucchInfo, 0, sizeof(SchPucchInfo)); } //send msg to MAC ret = sendUlSchInfoToMac(&ulSchedInfo, schInst); if(ret != ROK) { DU_LOG("\nSending UL Sch info from SCH to MAC failed"); } memset(cell->schUlSlotInfo[ulTimingInfo.slot], 0, sizeof(SchUlSlotInfo)); return ret; } /******************************************************************* * * @brief Fills pdcch and pdsch info for msg4 * * @details * * Function : schDlRsrcAllocMsg4 * * Functionality: * Fills pdcch and pdsch info for msg4 * * @params[in] * @return ROK - success * RFAILED - failure * * ****************************************************************/ uint8_t schDlRsrcAllocMsg4(Msg4Alloc *msg4Alloc, SchCellCb *cell, uint16_t slot) { uint8_t coreset0Idx = 0; uint8_t numRbs = 0; uint8_t firstSymbol = 0; uint8_t numSymbols = 0; uint8_t offset = 0; uint8_t offsetPointA; 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; PdcchCfg *pdcch = &msg4Alloc->msg4PdcchCfg; PdschCfg *pdsch = &msg4Alloc->msg4PdschCfg; BwpCfg *bwp = &msg4Alloc->bwp; initialBwp = &cell->cellCfg.schInitialDlBwp; offsetPointA = cell->cellCfg.ssbSchCfg.ssbOffsetPointA; 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 */ 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.coreSet0Size = numRbs; pdcch->coreset0Cfg.shiftIndex = cell->cellCfg.phyCellId; pdcch->coreset0Cfg.precoderGranularity = 0; /* sameAsRegBundle */ pdcch->numDlDci = 1; pdcch->dci.rnti = cell->schDlSlotInfo[slot]->msg4Info->crnti; pdcch->dci.scramblingId = cell->cellCfg.phyCellId; 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; /* fill the PDSCH PDU */ uint8_t cwCount = 0; pdsch->pduBitmap = 0; /* PTRS and CBG params are excluded */ pdsch->rnti = cell->schDlSlotInfo[slot]->msg4Info->crnti; 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; /* 38.214: Table 5.1.3.2-1, divided by 8 to get the value in bytes */ /* TODO : Calculate tbSize based of DL CCCH msg size */ tbSize = schCalcTbSize(2664/8); /* send this value to the func in bytes when considering msg4 size */ pdsch->codeword[cwCount].tbSize = tbSize; } pdsch->dataScramblingId = cell->cellCfg.phyCellId; pdsch->numLayers = 1; pdsch->transmissionScheme = 0; pdsch->refPoint = 0; pdsch->dmrs.dlDmrsSymbPos = 2; pdsch->dmrs.dmrsConfigType = 0; /* type-1 */ pdsch->dmrs.dlDmrsScramblingId = cell->cellCfg.phyCellId; pdsch->dmrs.scid = 0; pdsch->dmrs.numDmrsCdmGrpsNoData = 1; pdsch->dmrs.dmrsPorts = 0; pdsch->dmrs.mappingType = DMRS_MAP_TYPE_A; /* Setting to Type-A */ pdsch->dmrs.nrOfDmrsSymbols = NUM_DMRS_SYMBOLS; pdsch->dmrs.dmrsAddPos = DMRS_ADDITIONAL_POS; pdsch->pdschFreqAlloc.resourceAllocType = 1; /* RAT type-1 RIV format */ /* the RB numbering starts from coreset0, and PDSCH is always above SSB */ pdsch->pdschFreqAlloc.freqAlloc.startPrb = offset + SCH_SSB_NUM_PRB; pdsch->pdschFreqAlloc.freqAlloc.numPrb = schCalcNumPrb(tbSize,mcs,numPdschSymbols); pdsch->pdschFreqAlloc.vrbPrbMapping = 0; /* non-interleaved */ pdsch->pdschTimeAlloc.timeAlloc.startSymb = 2; /* spec-38.214, Table 5.1.2.1-1 */ pdsch->pdschTimeAlloc.timeAlloc.numSymb = 12; 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; pdcch->dci.pdschCfg = pdsch; return ROK; } uint16_t schAllocPucchResource(SchCellCb *cell,uint16_t crnti, uint16_t slot) { uint8_t k1 = 1; /* dl-DataToUL-ACK RRC parameter will received from DU-APP msg4-pucch config */ uint16_t pucchSlot = (slot + k1) % SCH_NUM_SLOTS; SchUlSlotInfo *schUlSlotInfo = NULLP; schUlSlotInfo = cell->schUlSlotInfo[pucchSlot]; memset(&schUlSlotInfo->schPucchInfo, 0, sizeof(SchPucchInfo)); schUlSlotInfo->pucchPres = true; schUlSlotInfo->schPucchInfo.rnti = crnti; return ROK; } /********************************************************************** End of file **********************************************************************/