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3 # Copyright (c) [2017-2019] [Radisys] #
5 # Licensed under the Apache License, Version 2.0 (the "License"); #
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19 /************************************************************************
25 Desc: C source code for rach handling functions
29 **********************************************************************/
32 @brief This file implements the rach handling.
34 #include "common_def.h"
40 #include "du_app_mac_inf.h"
41 #include "mac_sch_interface.h"
43 #include "sch_utils.h"
46 * @brief Checks if PRACH can be scheduled in current slot
50 * Function : schCheckPrachOcc
52 * This function checks if PRACH can be scheduled in
60 bool schCheckPrachOcc(SchCellCb *cell, SlotTimingInfo prachOccasionTimingInfo)
62 uint8_t prachCfgIdx = 0;
66 uint16_t prachSubframe = 0;
68 prachCfgIdx = cell->cellCfg.schRachCfg.prachCfgIdx;
70 /* derive the prachCfgIdx table paramters */
71 x = prachCfgIdxTable[prachCfgIdx][1];
72 y = prachCfgIdxTable[prachCfgIdx][2];
73 prachSubframe = prachCfgIdxTable[prachCfgIdx][3];
75 if((prachOccasionTimingInfo.sfn%x) == y)
77 subFrame = prachOccasionTimingInfo.slot/pow(2, cell->cellCfg.numerology);
79 /* check for subFrame number */
80 if ((1 << subFrame) & prachSubframe)
82 /* prach ocassion present in this subframe */
84 if(UL_SLOT != schGetSlotSymbFrmt(prachOccasionTimingInfo.slot % cell->numSlotsInPeriodicity,\
85 cell->slotFrmtBitMap))
87 DU_LOG("\nERROR --> SCH : PrachCfgIdx %d doesn't support UL slot", prachCfgIdx);
98 * @brief Calculate number of PRBs to be allocated for PRACH
102 * Function : schCalcPrachNumRb
104 * Calculate number of PRBs to be allocated for PRACH
106 * @param[in] SchCellCb *cell, cell cb
107 * @return Number of PRBs
109 uint8_t schCalcPrachNumRb(SchCellCb *cell)
111 uint8_t tableIdx = 0;
112 uint16_t puschScs = fetchScsValue(cell->cellCfg.schInitialUlBwp.bwp.scs);
114 for(tableIdx=0; tableIdx < MAX_RACH_NUM_RB_IDX; tableIdx++)
116 if((numRbForPrachTable[tableIdx][0] == cell->cellCfg.schRachCfg.rootSeqLen) &&
117 (numRbForPrachTable[tableIdx][1] == cell->cellCfg.schRachCfg.prachSubcSpacing) &&
118 (numRbForPrachTable[tableIdx][2] == puschScs))
120 return numRbForPrachTable[tableIdx][3];
127 * @brief resource allocation for PRACH
131 * Function : schPrachResAlloc
133 * This function handles PRACH allocation
135 * @param[in] SchCellCb *cell, cell cb
136 * @param[in] UlSchedInfo *ulSchedInfo, UL scheduling info
139 void schPrachResAlloc(SchCellCb *cell, UlSchedInfo *ulSchedInfo, SlotTimingInfo prachOccasionTimingInfo)
141 uint8_t numPrachRb = 0;
143 uint8_t prachCfgIdx = 0;
144 uint8_t prachFormat = 0;
145 uint8_t prachStartSymbol = 0;
146 uint8_t prachDuration = 0;
147 uint8_t prachOcas = 0;
148 uint8_t dataType = 0;
149 uint16_t freqStart = 0;
153 DU_LOG("\nERROR --> SCH : schPrachResAlloc(): Received cellCb is null");
157 /* If this slot is not a PRACH occassion, return */
158 if(!schCheckPrachOcc(cell, prachOccasionTimingInfo))
161 prachCfgIdx = cell->cellCfg.schRachCfg.prachCfgIdx;
162 prachFormat = prachCfgIdxTable[prachCfgIdx][0];
163 prachStartSymbol = prachCfgIdxTable[prachCfgIdx][4];
164 prachOcas = prachCfgIdxTable[prachCfgIdx][6];
165 prachDuration = prachCfgIdxTable[prachCfgIdx][7];
167 /* numRa determined as 𝑛 belonging {0,1,.., M − 1},
168 * where M is given by msg1Fdm */
169 numRa = (cell->cellCfg.schRachCfg.msg1Fdm - 1);
171 /* freq domain resource determination for RACH*/
172 freqStart = cell->cellCfg.schRachCfg.msg1FreqStart;
173 numPrachRb = schCalcPrachNumRb(cell);
174 /* Allocate PRACH resources from the UL resource bitmap */
175 allocatePrbUl(cell, prachOccasionTimingInfo, prachStartSymbol, prachDuration, &freqStart, numPrachRb);
178 dataType |= SCH_DATATYPE_PRACH;
179 ulSchedInfo->dataType = dataType;
180 ulSchedInfo->prachSchInfo.numPrachOcas = prachOcas;
181 ulSchedInfo->prachSchInfo.prachFormat = prachFormat;
182 ulSchedInfo->prachSchInfo.numRa = numRa;
183 ulSchedInfo->prachSchInfo.prachStartSymb = prachStartSymbol;
184 DU_LOG("\nINFO --> SCH : RACH occassion set for slot %d", prachOccasionTimingInfo.slot);
188 * @brief calculate ra-rnti function.
192 * Function : calculateRaRnti
194 * This function calculates ra-rnti
196 * @param[in] symbol index
197 * @param[in] slot index
198 * @param[in] frequency index
201 uint16_t calculateRaRnti(uint8_t symbolIdx, uint8_t slotIdx, uint8_t freqIdx)
204 uint8_t ulCarrierIdx = 0; /* Uplink carrier used for MSG1 transmission. 0:NUL carrier; 1:SUL carrier */
206 /* Refer to spec 38.321, section 5.1.3 */
207 raRnti = (1 + symbolIdx + (14*slotIdx) + (14*80*freqIdx) + (14*80*8*ulCarrierIdx));
212 * @brief create raCb function.
216 * Function : createSchRaCb
218 * This function create raCb
221 * @param[in] shed instance
224 void createSchRaCb(uint16_t tcrnti, Inst schInst)
228 GET_UE_IDX(tcrnti, ueIdx);
229 schCb[schInst].cells[schInst]->raCb[ueIdx -1].tcrnti = tcrnti;
230 schCb[schInst].cells[schInst]->raCb[ueIdx -1].msg4recvd = FALSE;
234 * @brief resource allocation for msg3 PUSCH
238 * Function : schAllocMsg3Pusch
240 * This function handles msg3 PUSCH allocation
242 * @param[in] Inst schInst, SCH instance
243 * @param[in] slot, current slot
244 * @param[out] msg3StartRb
245 * @param[out] msg3NumRb
248 SchPuschInfo* schAllocMsg3Pusch(Inst schInst, uint16_t crnti, uint8_t k2Index, SlotTimingInfo msg3SlotTime)
250 SchCellCb *cell = NULLP;
251 SchUlSlotInfo *schUlSlotInfo = NULLP;
252 uint8_t mcs = DEFAULT_MCS;
253 uint8_t startSymb = 0;
255 uint16_t startRb = 0;
259 cell = schCb[schInst].cells[schInst];
262 DU_LOG("\n\nERROR --> SCH : Failed to find cell in schAllocMsg3Pusch");
266 /* Allocate time-domain and frequency-domain resource for MSG3 PUSCH */
267 startSymb = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].startSymbol;
268 symbLen = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].symbolLength;
270 startRb = MAX_NUM_RB;
271 tbSize = schCalcTbSize(8); /* 6 bytes msg3 and 2 bytes header */
272 numRb = schCalcNumPrb(tbSize, mcs, symbLen);
273 numRb++; /* allocating 1 extra RB for now */
274 allocatePrbUl(cell, msg3SlotTime, startSymb, symbLen, &startRb, numRb);
276 /* Fill PUSCH scheduling details in Slot structure */
277 schUlSlotInfo = cell->schUlSlotInfo[msg3SlotTime.slot];
278 SCH_ALLOC(schUlSlotInfo->schPuschInfo, sizeof(SchPuschInfo));
279 if(!schUlSlotInfo->schPuschInfo)
281 DU_LOG("\nERROR --> SCH : Memory allocation failed in schAllocMsg3Pusch");
285 tbSize = 0; /* since nPrb has been incremented, recalculating tbSize */
286 tbSize = schCalcTbSizeFromNPrb(numRb, mcs, NUM_PDSCH_SYMBOL);
287 tbSize = tbSize / 8 ; /*bits to byte conversion*/
289 schUlSlotInfo->schPuschInfo->crnti = crnti;
290 schUlSlotInfo->schPuschInfo->harqProcId = SCH_HARQ_PROC_ID;
291 schUlSlotInfo->schPuschInfo->resAllocType = SCH_ALLOC_TYPE_1;
292 schUlSlotInfo->schPuschInfo->fdAlloc.startPrb = startRb;
293 schUlSlotInfo->schPuschInfo->fdAlloc.numPrb = numRb;
294 schUlSlotInfo->schPuschInfo->tdAlloc.startSymb = startSymb;
295 schUlSlotInfo->schPuschInfo->tdAlloc.numSymb = symbLen;
296 schUlSlotInfo->schPuschInfo->tbInfo.qamOrder = QPSK_MODULATION; /* QPSK modulation */
297 schUlSlotInfo->schPuschInfo->tbInfo.mcs = mcs;
298 schUlSlotInfo->schPuschInfo->tbInfo.mcsTable = SCH_MCS_TABLE_QAM_64;
299 schUlSlotInfo->schPuschInfo->tbInfo.ndi = NEW_TRANSMISSION; /* new transmission */
300 schUlSlotInfo->schPuschInfo->tbInfo.rv = 0;
301 schUlSlotInfo->schPuschInfo->tbInfo.tbSize = tbSize;
302 schUlSlotInfo->schPuschInfo->dmrsMappingType = DMRS_MAP_TYPE_A; /* Setting Type-A */
303 schUlSlotInfo->schPuschInfo->nrOfDmrsSymbols = NUM_DMRS_SYMBOLS;
304 schUlSlotInfo->schPuschInfo->dmrsAddPos = DMRS_ADDITIONAL_POS;
306 return schUlSlotInfo->schPuschInfo;
310 * @brief Check if a time frame is in RA Response window
314 * Function : isInRaRspWindow
316 * Check if a time frame is in RA Response window
318 * @param[in] RA request
319 * @param[in] Time frame to check
320 * @param[in] Total number of slot per radio frame
324 RaRspWindowStatus isInRaRspWindow(SchRaReq *raReq, SlotTimingInfo frameToCheck, uint16_t numSlotsPerSystemFrame)
326 uint32_t winStartTime, winEndTime, timeToCheck;
328 winStartTime = (raReq->winStartTime.sfn * numSlotsPerSystemFrame) + raReq->winStartTime.slot;
329 winEndTime = (raReq->winEndTime.sfn * numSlotsPerSystemFrame) + raReq->winEndTime.slot;
330 timeToCheck = (frameToCheck.sfn * numSlotsPerSystemFrame) + frameToCheck.slot;
332 /* TODO : check how to handle the wrap around scenario of MAX_SFN */
333 if((timeToCheck >= winStartTime) && (timeToCheck <= winEndTime))
334 return WITHIN_WINDOW;
335 else if(timeToCheck < winStartTime)
336 return WINDOW_YET_TO_START;
338 return WINDOW_EXPIRED;
342 * @brief Processes any pending RA request
346 * Function : schProcessRaReq
348 * This function process pending RA request
350 * @param[in] Current timing of the cell
353 bool schProcessRaReq(SchCellCb *cell, SlotTimingInfo currTime, uint8_t ueId)
355 bool k2Found = false;
356 uint8_t k0TblIdx = 0, k2TblIdx = 0;
357 uint8_t k0Index = 0, k2Index = 0;
358 uint8_t k0 = 0, k2 = 0;
360 uint8_t msg3Delta = 0, msg3MinSchTime = 0;
362 uint8_t totalCfgSlot = 0;
364 uint16_t dciSlot = 0, rarSlot = 0;
365 SlotTimingInfo dciTime, rarTime, msg3Time;
366 RarAlloc *dciSlotAlloc = NULLP; /* Stores info for transmission of PDCCH for RAR */
367 RarAlloc *rarSlotAlloc = NULLP; /* Stores info for transmission of RAR PDSCH */
368 SchPuschInfo *msg3PuschInfo = NULLP; /* Stores MSG3 PUSCH scheduling information */
369 SchK0K1TimingInfoTbl *k0K1InfoTbl=NULLP;
370 SchK2TimingInfoTbl *msg3K2InfoTbl=NULLP;
371 RaRspWindowStatus windowStatus=0;
374 totalCfgSlot = calculateSlotPatternLength(cell->cellCfg.ssbSchCfg.scsCommon, cell->cellCfg.tddCfg.tddPeriod);
376 k0K1InfoTbl = &cell->cellCfg.schInitialDlBwp.k0K1InfoTbl;
377 msg3K2InfoTbl = &cell->cellCfg.schInitialUlBwp.msg3K2InfoTbl;
378 puschMu = cell->cellCfg.numerology;
379 msg3Delta = puschDeltaTable[puschMu];
380 msg3MinSchTime = minMsg3SchTime[cell->cellCfg.numerology];
382 /* Calculating time frame to send DCI for RAR */
383 ADD_DELTA_TO_TIME(currTime, dciTime, PHY_DELTA_DL + SCHED_DELTA);
384 dciSlot = dciTime.slot;
386 /* Consider this slot for sending DCI, only if it is a DL slot */
387 if(schGetSlotSymbFrmt(dciSlot, cell->slotFrmtBitMap) == DL_SLOT)
390 /* If PDCCH is already scheduled on this slot, cannot schedule PDSCH for another UE here. */
391 if(cell->schDlSlotInfo[dciSlot]->pdcchUe != 0)
394 /* Check if this slot is within RA response window */
395 windowStatus = isInRaRspWindow(cell->raReq[ueId-1], dciTime, cell->numSlots);
396 if(windowStatus == WITHIN_WINDOW)
398 /* For all k0 values, search for a suitable k2 value to schedule MSG3.
399 * RAR DCI, RAR PDSCH and MSG3 is scheduled only if one such k0-k2 combination
400 * is found. Else no scheduling happens.
402 for(k0TblIdx = 0; k0TblIdx < k0K1InfoTbl->k0k1TimingInfo[dciSlot].numK0; k0TblIdx++)
404 k0Index = k0K1InfoTbl->k0k1TimingInfo[dciSlot].k0Indexes[k0TblIdx].k0Index;
405 k0 = cell->cellCfg.schInitialDlBwp.pdschCommon.timeDomRsrcAllocList[k0Index].k0;
407 /* Calculating time frame to send RAR PDSCH */
408 ADD_DELTA_TO_TIME(dciTime, rarTime, k0);
409 rarSlot = rarTime.slot;
411 /* If PDSCH is already scheduled on this slot, cannot schedule PDSCH for another UE here. */
412 if(cell->schDlSlotInfo[rarSlot]->pdschUe != 0)
415 for(k2TblIdx = 0; k2TblIdx < msg3K2InfoTbl->k2TimingInfo[rarSlot].numK2; k2TblIdx++)
417 k2Index = msg3K2InfoTbl->k2TimingInfo[rarSlot].k2Indexes[k2TblIdx];
418 k2 = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].k2;
420 /* Delta is added to the slot allocation for msg3 based on 38.214 section 6.1.2.1 */
422 if(k2 >= msg3MinSchTime)
424 ADD_DELTA_TO_TIME(rarTime, msg3Time, k2);
426 if(schGetSlotSymbFrmt(msg3Time.slot % totalCfgSlot, cell->slotFrmtBitMap) == DL_SLOT)
429 /* If PUSCH is already scheduled on this slot, another PUSCH
430 * pdu cannot be scheduled here */
431 if(cell->schUlSlotInfo[msg3Time.slot]->puschUe != 0)
442 else if(windowStatus == WINDOW_EXPIRED)
444 SCH_FREE(cell->raReq[ueId-1]->rachInd, sizeof(RachIndInfo));
445 SCH_FREE(cell->raReq[ueId-1], sizeof(SchRaReq));
449 /* If K0-K2 combination not found, no scheduling happens */
453 /* Allocate memory for RAR PDCCH slot, pointer will be checked at schProcessSlotInd() */
454 SCH_ALLOC(dciSlotAlloc, sizeof(RarAlloc));
455 if(dciSlotAlloc == NULLP)
457 DU_LOG("\nERROR --> SCH : Memory Allocation failed for dciSlotAlloc");
460 cell->schDlSlotInfo[dciSlot]->rarAlloc[ueId-1] = dciSlotAlloc;
462 /* Fill PDCCH and PDSCH scheduling information for RAR */
463 if((schFillRar(cell, rarTime, ueId, dciSlotAlloc, k0Index)) != ROK)
465 DU_LOG("\nERROR --> SCH: Scheduling of RAR failed in slot [%d]", rarSlot);
466 SCH_FREE(dciSlotAlloc, sizeof(RarAlloc));
467 cell->schDlSlotInfo[dciSlot]->rarAlloc[ueId-1] = NULLP;
471 /* Allocate resources for msg3 */
472 msg3PuschInfo = schAllocMsg3Pusch(cell->instIdx, cell->raReq[ueId-1]->rachInd->crnti, k2Index, msg3Time);
476 dciSlotAlloc->rarInfo.raRnti = cell->raReq[ueId-1]->raRnti;
477 dciSlotAlloc->rarInfo.tcrnti = cell->raReq[ueId-1]->rachInd->crnti;
478 dciSlotAlloc->rarInfo.RAPID = cell->raReq[ueId-1]->rachInd->preambleIdx;
479 dciSlotAlloc->rarInfo.ta = cell->raReq[ueId-1]->rachInd->timingAdv;
480 dciSlotAlloc->rarInfo.ulGrant.bwpSize = cell->cellCfg.schInitialUlBwp.bwp.freqAlloc.numPrb;
481 /* Spec 38.213, section 8.2, 0 : MSG3 PUSCH will be transmitted without frequency hopping */
482 dciSlotAlloc->rarInfo.ulGrant.freqHopFlag = 0;
483 dciSlotAlloc->rarInfo.ulGrant.msg3FreqAlloc.startPrb = msg3PuschInfo->fdAlloc.startPrb;
484 dciSlotAlloc->rarInfo.ulGrant.msg3FreqAlloc.numPrb = msg3PuschInfo->fdAlloc.numPrb;
485 dciSlotAlloc->rarInfo.ulGrant.k2Index = k2Index;
486 dciSlotAlloc->rarInfo.ulGrant.mcs = msg3PuschInfo->tbInfo.mcs;
487 dciSlotAlloc->rarInfo.ulGrant.tpc = 3; /* TODO : Check appropriate value to be filled */
488 /* Spec 38.213, section 8.2 : In a contention based random access
489 * procedure, the CSI request field is reserved. */
490 dciSlotAlloc->rarInfo.ulGrant.csiReq = 0;
493 /* Check if both DCI and RAR are sent in the same slot.
494 * If not, allocate memory RAR PDSCH slot to store RAR info
496 if(dciSlot == rarSlot)
497 dciSlotAlloc->pduPres = BOTH;
500 /* Allocate memory to schedule rarSlot to send RAR, pointer will be checked at schProcessSlotInd() */
501 SCH_ALLOC(rarSlotAlloc, sizeof(RarAlloc));
502 if(rarSlotAlloc == NULLP)
504 DU_LOG("\nERROR --> SCH : Memory Allocation failed for rarSlotAlloc");
505 SCH_FREE(dciSlotAlloc, sizeof(RarAlloc));
506 cell->schDlSlotInfo[dciSlot]->rarAlloc[ueId-1] = NULLP;
509 cell->schDlSlotInfo[rarSlot]->rarAlloc[ueId-1] = rarSlotAlloc;
511 /* Copy all RAR info */
512 memcpy(rarSlotAlloc, dciSlotAlloc, sizeof(RarAlloc));
513 rarSlotAlloc->rarPdcchCfg.dci.pdschCfg = &rarSlotAlloc->rarPdschCfg;
515 /* Assign correct PDU types in corresponding slots */
516 rarSlotAlloc->pduPres = PDSCH_PDU;
517 dciSlotAlloc->pduPres = PDCCH_PDU;
518 dciSlotAlloc->pdschSlot = rarSlot;
521 cell->schDlSlotInfo[dciSlot]->pdcchUe = ueId;
522 cell->schDlSlotInfo[rarSlot]->pdschUe = ueId;
523 cell->schUlSlotInfo[msg3Time.slot]->puschUe = ueId;
525 /* Create raCb at SCH */
526 createSchRaCb(cell->raReq[ueId-1]->rachInd->crnti, cell->instIdx);
528 /* Remove RachInd from pending RA request list */
529 SCH_FREE(cell->raReq[ueId-1]->rachInd, sizeof(RachIndInfo));
530 SCH_FREE(cell->raReq[ueId-1], sizeof(SchRaReq));
538 * @brief process rach indication function.
542 * Function : schProcessRachInd
544 * This function process rach indication
546 * @param[in] rachInd parameters
547 * @param[in] shed instance
550 uint8_t schProcessRachInd(RachIndInfo *rachInd, Inst schInst)
552 SchCellCb *cell = schCb[schInst].cells[schInst];
553 SchRaReq *raReq = NULLP;
560 DU_LOG("\nERROR --> SCH: Failed to find cell in schProcessRachInd");
564 /* Storing RA request in cellCb */
565 GET_UE_IDX(rachInd->crnti, ueIdx);
568 DU_LOG("\nERROR --> SCH: Invalid CRNTI [%d]", rachInd->crnti);
572 SCH_ALLOC(raReq, sizeof(SchRaReq));
575 DU_LOG("\nERROR --> SCH : Memory allocation failure in schProcessRachInd");
576 SCH_FREE(rachInd, sizeof(RachIndInfo));
580 /* calculate the ra-rnti value */
581 raReq->raRnti = calculateRaRnti(rachInd->symbolIdx, rachInd->slotIdx, rachInd->freqIdx);
582 raReq->rachInd = rachInd;
583 raReq->winStartTime.sfn = rachInd->timingInfo.sfn;
584 raReq->winStartTime.slot = rachInd->timingInfo.slot;
586 /* Converting window size from ms to number of slots */
587 slotDuration = (1 / pow(2, cell->cellCfg.numerology));
588 winNumSlots = (float)cell->cellCfg.schRachCfg.raRspWindow / slotDuration;
590 /* Adding window size to window start time to get window end time */
591 ADD_DELTA_TO_TIME(raReq->winStartTime, raReq->winEndTime, winNumSlots);
592 cell->raReq[ueIdx -1] = raReq;
594 /* Adding UE Id to list of pending UEs to be scheduled */
595 addUeToBeScheduled(cell, ueIdx);
601 * @brief fill RAR info function.
605 * Function : calculateRaRnti
607 * This function fills pdcch and pdsch info for RAR
609 * @param[in] rar Allocation info
612 * @param[in] offset to pointA to determine freq alloc
615 uint8_t schFillRar(SchCellCb *cell, SlotTimingInfo rarTime, uint16_t ueId, RarAlloc *rarAlloc, uint8_t k0Index)
617 uint8_t coreset0Idx = 0;
618 uint8_t firstSymbol = 0, numSymbols = 0;
619 uint8_t mcs = DEFAULT_MCS; /* MCS fixed to 4 */
620 uint8_t dmrsStartSymbol, startSymbol, numSymbol ;
624 SchBwpDlCfg *initialBwp = &cell->cellCfg.schInitialDlBwp;
625 PdcchCfg *pdcch = &rarAlloc->rarPdcchCfg;
626 PdschCfg *pdsch = &rarAlloc->rarPdschCfg;
627 BwpCfg *bwp = &rarAlloc->bwp;
629 /* derive the sib1 coreset0 params from table 13-1 spec 38.213 */
630 coreset0Idx = initialBwp->pdcchCommon.commonSearchSpace.coresetId;
631 numRbs = coresetIdxTable[coreset0Idx][1];
632 numSymbols = coresetIdxTable[coreset0Idx][2];
634 /* calculate time domain parameters */
635 // note: since slot value is made sl1, RAR can be sent at all slots
636 uint16_t mask = 0x2000;
637 for(firstSymbol=0; firstSymbol<MAX_SYMB_PER_SLOT; firstSymbol++)
639 if(initialBwp->pdcchCommon.commonSearchSpace.monitoringSymbol & mask)
646 bwp->freqAlloc.numPrb = initialBwp->bwp.freqAlloc.numPrb;
647 bwp->freqAlloc.startPrb = initialBwp->bwp.freqAlloc.startPrb;
648 bwp->subcarrierSpacing = initialBwp->bwp.scs;
649 bwp->cyclicPrefix = initialBwp->bwp.cyclicPrefix;
651 /* fill the PDCCH PDU */
652 pdcch->coresetCfg.startSymbolIndex = firstSymbol;
653 pdcch->coresetCfg.durationSymbols = numSymbols;
654 memcpy(pdcch->coresetCfg.freqDomainResource, \
655 cell->cellCfg.schInitialDlBwp.pdcchCommon.commonSearchSpace.freqDomainRsrc, FREQ_DOM_RSRC_SIZE);
657 pdcch->coresetCfg.cceRegMappingType = 1; /* coreset0 is always interleaved */
658 pdcch->coresetCfg.regBundleSize = 6; /* spec-38.211 sec 7.3.2.2 */
659 pdcch->coresetCfg.interleaverSize = 2; /* spec-38.211 sec 7.3.2.2 */
660 pdcch->coresetCfg.coreSetType = 0;
661 pdcch->coresetCfg.coreSetSize = numRbs;
662 pdcch->coresetCfg.shiftIndex = cell->cellCfg.phyCellId;
663 pdcch->coresetCfg.precoderGranularity = 0; /* sameAsRegBundle */
665 pdcch->dci.rnti = cell->raReq[ueId-1]->raRnti; /* RA-RNTI */
666 pdcch->dci.scramblingId = cell->cellCfg.phyCellId;
667 pdcch->dci.scramblingRnti = 0;
668 pdcch->dci.cceIndex = 4; /* considering SIB1 is sent at cce 0-1-2-3 */
669 pdcch->dci.aggregLevel = 4;
670 pdcch->dci.beamPdcchInfo.numPrgs = 1;
671 pdcch->dci.beamPdcchInfo.prgSize = 1;
672 pdcch->dci.beamPdcchInfo.digBfInterfaces = 0;
673 pdcch->dci.beamPdcchInfo.prg[0].pmIdx = 0;
674 pdcch->dci.beamPdcchInfo.prg[0].beamIdx[0] = 0;
675 pdcch->dci.txPdcchPower.powerValue = 0;
676 pdcch->dci.txPdcchPower.powerControlOffsetSS = 0;
677 pdcch->dci.pdschCfg = pdsch;
679 /* fill the PDSCH PDU */
681 pdsch->pduBitmap = 0; /* PTRS and CBG params are excluded */
682 pdsch->rnti = cell->raReq[ueId-1]->raRnti; /* RA-RNTI */
684 pdsch->numCodewords = 1;
685 for(cwCount = 0; cwCount < pdsch->numCodewords; cwCount++)
687 pdsch->codeword[cwCount].targetCodeRate = 308;
688 pdsch->codeword[cwCount].qamModOrder = 2;
689 pdsch->codeword[cwCount].mcsIndex = mcs; /* mcs configured to 4 */
690 pdsch->codeword[cwCount].mcsTable = 0; /* notqam256 */
691 pdsch->codeword[cwCount].rvIndex = 0;
692 /* RAR PDU length and FAPI payload header length */
693 tbSize = schCalcTbSize(RAR_PAYLOAD_SIZE + TX_PAYLOAD_HDR_LEN);
694 pdsch->codeword[cwCount].tbSize = tbSize;
696 pdsch->dataScramblingId = cell->cellCfg.phyCellId;
697 pdsch->numLayers = 1;
698 pdsch->transmissionScheme = 0;
700 pdsch->dmrs.dlDmrsSymbPos = 4; /* Bitmap value 00000000000100 i.e. using 3rd symbol for PDSCH DMRS */
701 pdsch->dmrs.dmrsConfigType = 0; /* type-1 */
702 pdsch->dmrs.dlDmrsScramblingId = cell->cellCfg.phyCellId;
703 pdsch->dmrs.scid = 0;
704 pdsch->dmrs.numDmrsCdmGrpsNoData = 1;
705 pdsch->dmrs.dmrsPorts = 0;
706 pdsch->dmrs.mappingType = DMRS_MAP_TYPE_A; /* Type-A */
707 pdsch->dmrs.nrOfDmrsSymbols = NUM_DMRS_SYMBOLS;
708 pdsch->dmrs.dmrsAddPos = DMRS_ADDITIONAL_POS;
710 pdsch->pdschTimeAlloc.rowIndex = k0Index;
711 pdsch->pdschTimeAlloc.timeAlloc.startSymb = initialBwp->pdschCommon.timeDomRsrcAllocList[k0Index].startSymbol;
712 pdsch->pdschTimeAlloc.timeAlloc.numSymb = initialBwp->pdschCommon.timeDomRsrcAllocList[k0Index].lengthSymbol;
714 pdsch->pdschFreqAlloc.vrbPrbMapping = 0; /* non-interleaved */
715 pdsch->pdschFreqAlloc.resourceAllocType = 1; /* RAT type-1 RIV format */
716 pdsch->pdschFreqAlloc.freqAlloc.startPrb = MAX_NUM_RB;
717 pdsch->pdschFreqAlloc.freqAlloc.numPrb = \
718 schCalcNumPrb(tbSize, mcs, initialBwp->pdschCommon.timeDomRsrcAllocList[k0Index].lengthSymbol);
720 /* Find total symbols occupied including DMRS */
721 dmrsStartSymbol = findDmrsStartSymbol(pdsch->dmrs.dlDmrsSymbPos);
722 /* If there are no DRMS symbols, findDmrsStartSymbol() returns MAX_SYMB_PER_SLOT,
723 * in that case only PDSCH symbols are marked as occupied */
724 if(dmrsStartSymbol == MAX_SYMB_PER_SLOT)
726 startSymbol = pdsch->pdschTimeAlloc.timeAlloc.startSymb;
727 numSymbol = pdsch->pdschTimeAlloc.timeAlloc.numSymb;
729 /* If DMRS symbol is found, mark DMRS and PDSCH symbols as occupied */
732 startSymbol = dmrsStartSymbol;
733 numSymbol = pdsch->dmrs.nrOfDmrsSymbols + pdsch->pdschTimeAlloc.timeAlloc.numSymb;
736 /* Allocate the number of PRBs required for RAR PDSCH */
737 if((allocatePrbDl(cell, rarTime, startSymbol, numSymbol,\
738 &pdsch->pdschFreqAlloc.freqAlloc.startPrb, pdsch->pdschFreqAlloc.freqAlloc.numPrb)) != ROK)
740 DU_LOG("\nERROR --> SCH : allocatePrbDl() failed for RAR");
744 pdsch->beamPdschInfo.numPrgs = 1;
745 pdsch->beamPdschInfo.prgSize = 1;
746 pdsch->beamPdschInfo.digBfInterfaces = 0;
747 pdsch->beamPdschInfo.prg[0].pmIdx = 0;
748 pdsch->beamPdschInfo.prg[0].beamIdx[0] = 0;
749 pdsch->txPdschPower.powerControlOffset = 0;
750 pdsch->txPdschPower.powerControlOffsetSS = 0;
755 /**********************************************************************
757 **********************************************************************/