#include "sch.h"
#include "sch_utils.h"
-SchCb schCb[SCH_MAX_INST];
-uint8_t puschDeltaTable[MAX_MU_PUSCH];
+/**
+ * @brief Checks if PRACH can be scheduled in current slot
+ *
+ * @details
+ *
+ * Function : schCheckPrachOcc
+ *
+ * This function checks if PRACH can be scheduled in
+ * current slot
+ *
+ * @param[in] Cell Cb
+ * Slot timing
+ * @return TRUE
+ * FALSE
+ **/
+bool schCheckPrachOcc(SchCellCb *cell, SlotTimingInfo prachOccasionTimingInfo)
+{
+ uint8_t prachCfgIdx = 0;
+ uint8_t x = 0;
+ uint8_t y = 0;
+ uint8_t subFrame = 0;
+ uint16_t prachSubframe = 0;
+
+ 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)
+ {
+ subFrame = prachOccasionTimingInfo.slot/pow(2, cell->cellCfg.numerology);
+
+ /* check for subFrame number */
+ if ((1 << subFrame) & prachSubframe)
+ {
+ /* prach ocassion present in this subframe */
+#ifdef NR_TDD
+ if(UL_SLOT != schGetSlotSymbFrmt(prachOccasionTimingInfo.slot % cell->numSlotsInPeriodicity,\
+ cell->slotFrmtBitMap))
+ {
+ DU_LOG("\nERROR --> SCH : PrachCfgIdx %d doesn't support UL slot", prachCfgIdx);
+ return FALSE;
+ }
+#endif
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+/**
+ * @brief Calculate number of PRBs to be allocated for PRACH
+ *
+ * @details
+ *
+ * Function : schCalcPrachNumRb
+ *
+ * Calculate number of PRBs to be allocated for PRACH
+ *
+ * @param[in] SchCellCb *cell, cell cb
+ * @return Number of PRBs
+ **/
+uint8_t schCalcPrachNumRb(SchCellCb *cell)
+{
+ uint8_t tableIdx = 0;
+ uint16_t puschScs = fetchScsValue(cell->cellCfg.schInitialUlBwp.bwp.scs);
+
+ for(tableIdx=0; tableIdx < MAX_RACH_NUM_RB_IDX; tableIdx++)
+ {
+ if((numRbForPrachTable[tableIdx][0] == cell->cellCfg.schRachCfg.rootSeqLen) &&
+ (numRbForPrachTable[tableIdx][1] == cell->cellCfg.schRachCfg.prachSubcSpacing) &&
+ (numRbForPrachTable[tableIdx][2] == puschScs))
+ {
+ return numRbForPrachTable[tableIdx][3];
+ }
+ }
+ return 0;
+}
+
+/**
+ * @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, SlotTimingInfo prachOccasionTimingInfo)
+{
+ uint8_t numPrachRb = 0;
+ uint8_t numRa = 0;
+ uint8_t prachCfgIdx = 0;
+ uint8_t prachFormat = 0;
+ uint8_t prachStartSymbol = 0;
+ uint8_t prachDuration = 0;
+ uint8_t prachOcas = 0;
+ uint8_t dataType = 0;
+ uint16_t freqStart = 0;
+
+ /* If this slot is not a PRACH occassion, return */
+ if(!schCheckPrachOcc(cell, prachOccasionTimingInfo))
+ return;
+
+ prachCfgIdx = cell->cellCfg.schRachCfg.prachCfgIdx;
+ prachFormat = prachCfgIdxTable[prachCfgIdx][0];
+ prachStartSymbol = prachCfgIdxTable[prachCfgIdx][4];
+ prachOcas = prachCfgIdxTable[prachCfgIdx][6];
+ prachDuration = prachCfgIdxTable[prachCfgIdx][7];
+
+ /* numRa determined as 𝑛 belonging {0,1,.., M − 1},
+ * where M is given by msg1Fdm */
+ numRa = (cell->cellCfg.schRachCfg.msg1Fdm - 1);
+
+ /* freq domain resource determination for RACH*/
+ freqStart = cell->cellCfg.schRachCfg.msg1FreqStart;
+ numPrachRb = schCalcPrachNumRb(cell);
+ /* Allocate PRACH resources from the UL resource bitmap */
+ allocatePrbUl(cell, prachOccasionTimingInfo, prachStartSymbol, prachDuration, &freqStart, numPrachRb);
+
+ /* prach info */
+ dataType |= SCH_DATATYPE_PRACH;
+ ulSchedInfo->dataType = dataType;
+ ulSchedInfo->prachSchInfo.numPrachOcas = prachOcas;
+ ulSchedInfo->prachSchInfo.prachFormat = prachFormat;
+ ulSchedInfo->prachSchInfo.numRa = numRa;
+ ulSchedInfo->prachSchInfo.prachStartSymb = prachStartSymbol;
+ DU_LOG("\nINFO --> SCH : RACH occassion set for slot %d", prachOccasionTimingInfo.slot);
+}
/**
* @brief calculate ra-rnti function.
* @param[out] msg3NumRb
* @return void
**/
-SchPuschInfo* schAllocMsg3Pusch(Inst schInst, uint16_t crnti, uint8_t k2Index, uint16_t msg3Slot)
+SchPuschInfo* schAllocMsg3Pusch(Inst schInst, uint16_t crnti, uint8_t k2Index, SlotTimingInfo msg3SlotTime)
{
SchCellCb *cell = NULLP;
SchUlSlotInfo *schUlSlotInfo = NULLP;
- uint8_t startSymb = 0;
- uint8_t symbLen = 0;
- uint8_t startRb = 0;
- uint8_t numRb = 0;
- uint8_t idx = 0;
- uint8_t mcs = 4;
- uint16_t tbSize = 0;
+ uint8_t mcs = DEFAULT_MCS;
+ uint8_t startSymb = 0;
+ uint8_t symbLen = 0;
+ uint16_t startRb = 0;
+ uint16_t numRb = 0;
+ uint16_t tbSize = 0;
cell = schCb[schInst].cells[schInst];
if(cell == NULL)
return NULLP;
}
+ /* Allocate time-domain and frequency-domain resource for MSG3 PUSCH */
startSymb = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].startSymbol;
symbLen = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].symbolLength;
- startRb = cell->schUlSlotInfo[msg3Slot]->puschCurrentPrb;
- tbSize = schCalcTbSize(8); /* 6 bytes msg3 and 2 bytes header */
- numRb = schCalcNumPrb(tbSize, mcs, NUM_PDSCH_SYMBOL);
-
- /* allocating 1 extra RB for now */
- numRb++;
- /* increment PUSCH PRB */
- cell->schUlSlotInfo[msg3Slot]->puschCurrentPrb += numRb;
-
- for(idx=startSymb; idx<symbLen; idx++)
- {
- //cell->schUlSlotInfo[msg3Slot]->assignedPrb[idx] = startRb + numRb;
- }
- schUlSlotInfo = cell->schUlSlotInfo[msg3Slot];
+ startRb = MAX_NUM_RB;
+ tbSize = schCalcTbSize(8); /* 6 bytes msg3 and 2 bytes header */
+ numRb = schCalcNumPrb(tbSize, mcs, symbLen);
+ numRb++; /* allocating 1 extra RB for now */
+ allocatePrbUl(cell, msg3SlotTime, startSymb, symbLen, &startRb, numRb);
+ /* Fill PUSCH scheduling details in Slot structure */
+ schUlSlotInfo = cell->schUlSlotInfo[msg3SlotTime.slot];
SCH_ALLOC(schUlSlotInfo->schPuschInfo, sizeof(SchPuschInfo));
if(!schUlSlotInfo->schPuschInfo)
{
DU_LOG("\nERROR --> SCH : Memory allocation failed in schAllocMsg3Pusch");
return NULLP;
}
+
tbSize = 0; /* since nPrb has been incremented, recalculating tbSize */
tbSize = schCalcTbSizeFromNPrb(numRb, mcs, NUM_PDSCH_SYMBOL);
tbSize = tbSize / 8 ; /*bits to byte conversion*/
+
schUlSlotInfo->schPuschInfo->crnti = crnti;
schUlSlotInfo->schPuschInfo->harqProcId = SCH_HARQ_PROC_ID;
schUlSlotInfo->schPuschInfo->resAllocType = SCH_ALLOC_TYPE_1;
schUlSlotInfo->schPuschInfo->tbInfo.mcsTable = SCH_MCS_TABLE_QAM_64;
schUlSlotInfo->schPuschInfo->tbInfo.ndi = NEW_TRANSMISSION; /* new transmission */
schUlSlotInfo->schPuschInfo->tbInfo.rv = 0;
- schUlSlotInfo->schPuschInfo->tbInfo.tbSize = tbSize; /*Considering 2 PRBs */
+ schUlSlotInfo->schPuschInfo->tbInfo.tbSize = tbSize;
schUlSlotInfo->schPuschInfo->dmrsMappingType = DMRS_MAP_TYPE_A; /* Setting Type-A */
schUlSlotInfo->schPuschInfo->nrOfDmrsSymbols = NUM_DMRS_SYMBOLS;
schUlSlotInfo->schPuschInfo->dmrsAddPos = DMRS_ADDITIONAL_POS;
#ifdef NR_TDD
uint8_t totalCfgSlot = 0;
#endif
- uint16_t dciSlot = 0, rarSlot = 0, msg3Slot = 0;
- SlotTimingInfo dciTime, rarTime;
+ uint16_t dciSlot = 0, rarSlot = 0;
+ SlotTimingInfo dciTime, rarTime, msg3Time;
RarAlloc *dciSlotAlloc = NULLP; /* Stores info for transmission of PDCCH for RAR */
RarAlloc *rarSlotAlloc = NULLP; /* Stores info for transmission of RAR PDSCH */
SchPuschInfo *msg3PuschInfo = NULLP; /* Stores MSG3 PUSCH scheduling information */
k2 = k2 + msg3Delta;
if(k2 >= msg3MinSchTime)
{
- msg3Slot = (rarSlot + k2) % cell->numSlots;
+ ADD_DELTA_TO_TIME(rarTime, msg3Time, k2);
#ifdef NR_TDD
- if(schGetSlotSymbFrmt(msg3Slot % totalCfgSlot, cell->slotFrmtBitMap) == DL_SLOT)
+ if(schGetSlotSymbFrmt(msg3Time.slot % totalCfgSlot, cell->slotFrmtBitMap) == DL_SLOT)
continue;
#endif
k2Found = true;
}
/* Allocate resources for msg3 */
- msg3PuschInfo = schAllocMsg3Pusch(cell->instIdx, cell->raReq[ueIdx]->rachInd->crnti, k2Index, msg3Slot);
+ msg3PuschInfo = schAllocMsg3Pusch(cell->instIdx, cell->raReq[ueIdx]->rachInd->crnti, k2Index, msg3Time);
if(msg3PuschInfo)
{
/* Fill RAR info */
{
uint8_t coreset0Idx = 0;
uint8_t firstSymbol = 0, numSymbols = 0;
- uint8_t mcs = 4; /* MCS fixed to 4 */
+ uint8_t mcs = DEFAULT_MCS; /* MCS fixed to 4 */
uint8_t dmrsStartSymbol, startSymbol, numSymbol ;
uint16_t numRbs = 0;
uint16_t tbSize = 0;
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