#include "sch.h"
#include "sch_utils.h"
-extern SchCb schCb[SCH_MAX_INST];
-extern 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 = convertScsEnumValToScsVal(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(cell == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH : schPrachResAlloc(): Received cellCb is null");
+ return;
+ }
+
+ /* 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.
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;
+ uint8_t ulCarrierIdx = 0; /* Uplink carrier used for MSG1 transmission. 0:NUL carrier; 1:SUL carrier */
+
+ /* Refer to spec 38.321, section 5.1.3 */
+ raRnti = (1 + symbolIdx + (14*slotIdx) + (14*80*freqIdx) + (14*80*8*ulCarrierIdx));
+ return raRnti;
}
/**
**/
void createSchRaCb(uint16_t tcrnti, Inst schInst)
{
- schCb[schInst].cells[schInst]->raCb[0].tcrnti = tcrnti;
+ uint8_t ueId = 0;
+
+ GET_UE_ID(tcrnti, ueId);
+ schCb[schInst].cells[schInst]->raCb[ueId -1].tcrnti = tcrnti;
+ schCb[schInst].cells[schInst]->raCb[ueId -1].msg4recvd = FALSE;
}
/**
* @param[out] msg3NumRb
* @return void
**/
-uint8_t schAllocMsg3Pusch(Inst schInst, uint16_t slot, uint16_t *msg3StartRb,
-uint8_t *msg3NumRb)
+SchPuschInfo* schAllocMsg3Pusch(Inst schInst, uint16_t crnti, uint8_t k2Index, SlotTimingInfo msg3SlotTime)
{
- 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;
- uint8_t mcs = 4;
- uint8_t numPdschSymbols= 14;
- uint16_t tbSize = 0;
-
+ SchCellCb *cell = NULLP;
+ SchUlSlotInfo *schUlSlotInfo = NULLP;
+ 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];
- // 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 = cell->schUlSlotInfo[msg3SlotAlloc]->puschCurrentPrb;
- tbSize = schCalcTbSize(8); /* 6 bytes msg3 and 2 bytes header */
- numRb = schCalcNumPrb(tbSize, mcs, numPdschSymbols);
-
- /* allocating 1 extra RB for now */
- numRb++;
- /* increment PUSCH PRB */
- cell->schUlSlotInfo[msg3SlotAlloc]->puschCurrentPrb += numRb;
-
- for(idx=startSymb; idx<symbLen; idx++)
+ if(cell == NULL)
{
- cell->schUlSlotInfo[msg3SlotAlloc]->assignedPrb[idx] = startRb + numRb;
+ DU_LOG("\n\nERROR --> SCH : Failed to find cell in schAllocMsg3Pusch");
+ return NULLP;
}
- schUlSlotInfo = cell->schUlSlotInfo[msg3SlotAlloc];
+ /* 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 = 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("SCH: Memory allocation failed in schAllocMsg3Pusch");
- return RFAILED;
+ 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->fdAlloc.startPrb = startRb;
schUlSlotInfo->schPuschInfo->fdAlloc.numPrb = numRb;
schUlSlotInfo->schPuschInfo->tdAlloc.startSymb = startSymb;
schUlSlotInfo->schPuschInfo->tdAlloc.numSymb = symbLen;
- schUlSlotInfo->schPuschInfo->tbInfo.mcs = mcs;
- schUlSlotInfo->schPuschInfo->tbInfo.ndi = 1; /* new transmission */
+ schUlSlotInfo->schPuschInfo->tbInfo.qamOrder = QPSK_MODULATION; /* QPSK modulation */
+ schUlSlotInfo->schPuschInfo->tbInfo.mcs = mcs;
+ 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 = 24; /*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;
- *msg3StartRb = startRb;
- *msg3NumRb = numRb;
-
- return ROK;
+ return schUlSlotInfo->schPuschInfo;
}
+/**
+ * @brief Check if a time frame is in RA Response window
+ *
+ * @details
+ *
+ * Function : isInRaRspWindow
+ *
+ * Check if a time frame is in RA Response window
+ *
+ * @param[in] RA request
+ * @param[in] Time frame to check
+ * @param[in] Total number of slot per radio frame
+ * @return true
+ * @return false
+ **/
+RaRspWindowStatus isInRaRspWindow(SchRaReq *raReq, SlotTimingInfo frameToCheck, uint16_t numSlotsPerSystemFrame)
+{
+ uint32_t winStartTime, winEndTime, timeToCheck;
+
+ winStartTime = (raReq->winStartTime.sfn * numSlotsPerSystemFrame) + raReq->winStartTime.slot;
+ winEndTime = (raReq->winEndTime.sfn * numSlotsPerSystemFrame) + raReq->winEndTime.slot;
+ timeToCheck = (frameToCheck.sfn * numSlotsPerSystemFrame) + frameToCheck.slot;
+
+ /* TODO : check how to handle the wrap around scenario of MAX_SFN */
+ if((timeToCheck >= winStartTime) && (timeToCheck <= winEndTime))
+ return WITHIN_WINDOW;
+ else if(timeToCheck < winStartTime)
+ return WINDOW_YET_TO_START;
+
+ return WINDOW_EXPIRED;
+}
+/**
+ * @brief Processes any pending RA request
+ *
+ * @details
+ *
+ * Function : schProcessRaReq
+ *
+ * This function process pending RA request
+ *
+ * @param[in] Current timing of the cell
+ * @return ROK
+ **/
+bool schProcessRaReq(Inst schInst, SchCellCb *cell, SlotTimingInfo currTime, uint8_t ueId)
+{
+ bool k2Found = false;
+ uint8_t k0TblIdx = 0, k2TblIdx = 0;
+ uint8_t k0Index = 0, k2Index = 0;
+ uint8_t k0 = 0, k2 = 0;
+ uint8_t puschMu = 0;
+ uint8_t msg3Delta = 0, msg3MinSchTime = 0;
+#ifdef NR_TDD
+ uint8_t totalCfgSlot = 0;
+#endif
+ 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 */
+ SchK0K1TimingInfoTbl *k0K1InfoTbl=NULLP;
+ SchK2TimingInfoTbl *msg3K2InfoTbl=NULLP;
+ RaRspWindowStatus windowStatus=0;
+
+#ifdef NR_TDD
+ totalCfgSlot = calculateSlotPatternLength(cell->cellCfg.ssbSchCfg.scsCommon, cell->cellCfg.tddCfg.tddPeriod);
+#endif
+ k0K1InfoTbl = &cell->cellCfg.schInitialDlBwp.k0K1InfoTbl;
+ msg3K2InfoTbl = &cell->cellCfg.schInitialUlBwp.msg3K2InfoTbl;
+ puschMu = cell->cellCfg.numerology;
+ msg3Delta = puschDeltaTable[puschMu];
+ msg3MinSchTime = minMsg3SchTime[cell->cellCfg.numerology];
+
+ /* Calculating time frame to send DCI for RAR */
+ ADD_DELTA_TO_TIME(currTime, dciTime, PHY_DELTA_DL + SCHED_DELTA);
+ dciSlot = dciTime.slot;
+#ifdef NR_TDD
+ /* Consider this slot for sending DCI, only if it is a DL slot */
+ if(schGetSlotSymbFrmt(dciSlot, cell->slotFrmtBitMap) == DL_SLOT)
+#endif
+ {
+ /* If PDCCH is already scheduled on this slot, cannot schedule PDSCH for another UE here. */
+ if(cell->schDlSlotInfo[dciSlot]->pdcchUe != 0)
+ return false;
+
+ /* Check if this slot is within RA response window */
+ windowStatus = isInRaRspWindow(cell->raReq[ueId-1], dciTime, cell->numSlots);
+ if(windowStatus == WITHIN_WINDOW)
+ {
+ /* For all k0 values, search for a suitable k2 value to schedule MSG3.
+ * RAR DCI, RAR PDSCH and MSG3 is scheduled only if one such k0-k2 combination
+ * is found. Else no scheduling happens.
+ */
+ for(k0TblIdx = 0; k0TblIdx < k0K1InfoTbl->k0k1TimingInfo[dciSlot].numK0; k0TblIdx++)
+ {
+ k0Index = k0K1InfoTbl->k0k1TimingInfo[dciSlot].k0Indexes[k0TblIdx].k0Index;
+ k0 = cell->cellCfg.schInitialDlBwp.pdschCommon.timeDomRsrcAllocList[k0Index].k0;
+
+ /* Calculating time frame to send RAR PDSCH */
+ ADD_DELTA_TO_TIME(dciTime, rarTime, k0);
+ rarSlot = rarTime.slot;
+
+ /* If PDSCH is already scheduled on this slot, cannot schedule PDSCH for another UE here. */
+ if(cell->schDlSlotInfo[rarSlot]->pdschUe != 0)
+ continue;
+
+ for(k2TblIdx = 0; k2TblIdx < msg3K2InfoTbl->k2TimingInfo[rarSlot].numK2; k2TblIdx++)
+ {
+ k2Index = msg3K2InfoTbl->k2TimingInfo[rarSlot].k2Indexes[k2TblIdx];
+ k2 = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].k2;
+
+ /* Delta is added to the slot allocation for msg3 based on 38.214 section 6.1.2.1 */
+ k2 = k2 + msg3Delta;
+ if(k2 >= msg3MinSchTime)
+ {
+ ADD_DELTA_TO_TIME(rarTime, msg3Time, k2);
+#ifdef NR_TDD
+ if(schGetSlotSymbFrmt(msg3Time.slot % totalCfgSlot, cell->slotFrmtBitMap) == DL_SLOT)
+ continue;
+#endif
+ /* If PUSCH is already scheduled on this slot, another PUSCH
+ * pdu cannot be scheduled here */
+ if(cell->schUlSlotInfo[msg3Time.slot]->puschUe != 0)
+ continue;
+
+ k2Found = true;
+ break;
+ }
+ }
+ if(k2Found)
+ break;
+ }
+ }
+ else if(windowStatus == WINDOW_EXPIRED)
+ {
+ SCH_FREE(cell->raReq[ueId-1]->rachInd, sizeof(RachIndInfo));
+ SCH_FREE(cell->raReq[ueId-1], sizeof(SchRaReq));
+ return false;
+ }
+
+ /* If K0-K2 combination not found, no scheduling happens */
+ if(!k2Found)
+ return false;
+
+ /* Allocate memory for RAR PDCCH slot, pointer will be checked at schProcessSlotInd() */
+ SCH_ALLOC(dciSlotAlloc, sizeof(RarAlloc));
+ if(dciSlotAlloc == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH : Memory Allocation failed for dciSlotAlloc");
+ return false;
+ }
+ cell->schDlSlotInfo[dciSlot]->rarAlloc[ueId-1] = dciSlotAlloc;
+
+ /* Fill PDCCH and PDSCH scheduling information for RAR */
+ if((schFillRar(cell, rarTime, ueId, dciSlotAlloc, k0Index)) != ROK)
+ {
+ DU_LOG("\nERROR --> SCH: Scheduling of RAR failed in slot [%d]", rarSlot);
+ SCH_FREE(dciSlotAlloc, sizeof(RarAlloc));
+ cell->schDlSlotInfo[dciSlot]->rarAlloc[ueId-1] = NULLP;
+ return false;
+ }
+
+ /* Allocate resources for msg3 */
+ msg3PuschInfo = schAllocMsg3Pusch(schInst, cell->raReq[ueId-1]->rachInd->crnti, k2Index, msg3Time);
+ if(msg3PuschInfo)
+ {
+ /* Fill RAR info */
+ dciSlotAlloc->rarInfo.raRnti = cell->raReq[ueId-1]->raRnti;
+ dciSlotAlloc->rarInfo.tcrnti = cell->raReq[ueId-1]->rachInd->crnti;
+ dciSlotAlloc->rarInfo.RAPID = cell->raReq[ueId-1]->rachInd->preambleIdx;
+ dciSlotAlloc->rarInfo.ta = cell->raReq[ueId-1]->rachInd->timingAdv;
+ dciSlotAlloc->rarInfo.ulGrant.bwpSize = cell->cellCfg.schInitialUlBwp.bwp.freqAlloc.numPrb;
+ /* Spec 38.213, section 8.2, 0 : MSG3 PUSCH will be transmitted without frequency hopping */
+ dciSlotAlloc->rarInfo.ulGrant.freqHopFlag = 0;
+ dciSlotAlloc->rarInfo.ulGrant.msg3FreqAlloc.startPrb = msg3PuschInfo->fdAlloc.startPrb;
+ dciSlotAlloc->rarInfo.ulGrant.msg3FreqAlloc.numPrb = msg3PuschInfo->fdAlloc.numPrb;
+ dciSlotAlloc->rarInfo.ulGrant.k2Index = k2Index;
+ dciSlotAlloc->rarInfo.ulGrant.mcs = msg3PuschInfo->tbInfo.mcs;
+ dciSlotAlloc->rarInfo.ulGrant.tpc = 3; /* TODO : Check appropriate value to be filled */
+ /* Spec 38.213, section 8.2 : In a contention based random access
+ * procedure, the CSI request field is reserved. */
+ dciSlotAlloc->rarInfo.ulGrant.csiReq = 0;
+ }
+
+ /* Check if both DCI and RAR are sent in the same slot.
+ * If not, allocate memory RAR PDSCH slot to store RAR info
+ */
+ if(dciSlot == rarSlot)
+ dciSlotAlloc->pduPres = BOTH;
+ else
+ {
+ /* Allocate memory to schedule rarSlot to send RAR, pointer will be checked at schProcessSlotInd() */
+ SCH_ALLOC(rarSlotAlloc, sizeof(RarAlloc));
+ if(rarSlotAlloc == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH : Memory Allocation failed for rarSlotAlloc");
+ SCH_FREE(dciSlotAlloc, sizeof(RarAlloc));
+ cell->schDlSlotInfo[dciSlot]->rarAlloc[ueId-1] = NULLP;
+ return false;
+ }
+ cell->schDlSlotInfo[rarSlot]->rarAlloc[ueId-1] = rarSlotAlloc;
+
+ /* Copy all RAR info */
+ memcpy(rarSlotAlloc, dciSlotAlloc, sizeof(RarAlloc));
+ rarSlotAlloc->rarPdcchCfg.dci.pdschCfg = &rarSlotAlloc->rarPdschCfg;
+
+ /* Assign correct PDU types in corresponding slots */
+ rarSlotAlloc->pduPres = PDSCH_PDU;
+ dciSlotAlloc->pduPres = PDCCH_PDU;
+ dciSlotAlloc->pdschSlot = rarSlot;
+ }
+
+ cell->schDlSlotInfo[dciSlot]->pdcchUe = ueId;
+ cell->schDlSlotInfo[rarSlot]->pdschUe = ueId;
+ cell->schUlSlotInfo[msg3Time.slot]->puschUe = ueId;
+
+ /* Create raCb at SCH */
+ createSchRaCb(cell->raReq[ueId-1]->rachInd->crnti, schInst);
+
+ /* Remove RachInd from pending RA request list */
+ SCH_FREE(cell->raReq[ueId-1]->rachInd, sizeof(RachIndInfo));
+ SCH_FREE(cell->raReq[ueId-1], sizeof(SchRaReq));
+
+ return true;
+ }
+ return false;
+}
/**
* @brief process rach indication function.
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;
+ SchRaReq *raReq = NULLP;
+ float slotDuration;
+ uint8_t winNumSlots;
+ uint8_t ueId;
- SchDlSlotInfo *schDlSlotInfo = cell->schDlSlotInfo[rarSlot]; /* RAR will sent in the next slot */
+ if(cell == NULLP)
+ {
+ DU_LOG("\nERROR --> SCH: Failed to find cell in schProcessRachInd");
+ return RFAILED;
+ }
- /* Allocate the rarInfo, this pointer will be checked at schProcessSlotInd function */
- SCH_ALLOC(rarInfo, sizeof(RarInfo));
- if(rarInfo == NULLP)
+ /* Storing RA request in cellCb */
+ GET_UE_ID(rachInd->crnti, ueId);
+ if(ueId <= 0)
{
- DU_LOG("\nMAC: Memory Allocation failed for rarInfo");
+ DU_LOG("\nERROR --> SCH: Invalid CRNTI [%d]", rachInd->crnti);
return RFAILED;
}
- schDlSlotInfo->rarInfo = rarInfo;
+ SCH_ALLOC(raReq, sizeof(SchRaReq));
+ if(!raReq)
+ {
+ DU_LOG("\nERROR --> SCH : Memory allocation failure in schProcessRachInd");
+ SCH_FREE(rachInd, sizeof(RachIndInfo));
+ return RFAILED;
+ }
/* calculate the ra-rnti value */
- raRnti = calculateRaRnti(rachInd->symbolIdx,rachInd->slotIdx,rachInd->freqIdx);
+ raReq->raRnti = calculateRaRnti(rachInd->symbolIdx, rachInd->slotIdx, rachInd->freqIdx);
+ raReq->rachInd = rachInd;
+ raReq->winStartTime.sfn = rachInd->timingInfo.sfn;
+ raReq->winStartTime.slot = rachInd->timingInfo.slot;
+
+ /* Converting window size from ms to number of slots */
+ slotDuration = (1 / pow(2, cell->cellCfg.numerology));
+ winNumSlots = (float)cell->cellCfg.schRachCfg.raRspWindow / slotDuration;
+
+ /* Adding window size to window start time to get window end time */
+ ADD_DELTA_TO_TIME(raReq->winStartTime, raReq->winEndTime, winNumSlots);
+ cell->raReq[ueId -1] = raReq;
- /* create raCb at SCH */
- createSchRaCb(rachInd->crnti,schInst);
+ /* Adding UE Id to list of pending UEs to be scheduled */
+ addUeToBeScheduled(cell, ueId);
- /* 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;
+ return ROK;
}
/**
* @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)
+uint8_t schFillRar(SchCellCb *cell, SlotTimingInfo rarTime, uint16_t ueId, RarAlloc *rarAlloc, uint8_t k0Index)
{
- 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};
+ uint8_t coreset0Idx = 0;
+ uint8_t firstSymbol = 0, numSymbols = 0;
+ uint8_t mcs = DEFAULT_MCS; /* MCS fixed to 4 */
+ uint8_t dmrsStartSymbol, startSymbol, numSymbol ;
+ uint16_t numRbs = 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;
+ SchBwpDlCfg *initialBwp = &cell->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];
+ coreset0Idx = initialBwp->pdcchCommon.commonSearchSpace.coresetId;
+ numRbs = coresetIdxTable[coreset0Idx][1];
+ numSymbols = coresetIdxTable[coreset0Idx][2];
/* 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++)
+ for(firstSymbol=0; firstSymbol<MAX_SYMB_PER_SLOT; firstSymbol++)
{
if(initialBwp->pdcchCommon.commonSearchSpace.monitoringSymbol & mask)
break;
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->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->coresetCfg.startSymbolIndex = firstSymbol;
+ pdcch->coresetCfg.durationSymbols = numSymbols;
+ memcpy(pdcch->coresetCfg.freqDomainResource, \
+ cell->cellCfg.schInitialDlBwp.pdcchCommon.commonSearchSpace.freqDomainRsrc, FREQ_DOM_RSRC_SIZE);
+
+ pdcch->coresetCfg.cceRegMappingType = 1; /* coreset0 is always interleaved */
+ pdcch->coresetCfg.regBundleSize = 6; /* spec-38.211 sec 7.3.2.2 */
+ pdcch->coresetCfg.interleaverSize = 2; /* spec-38.211 sec 7.3.2.2 */
+ pdcch->coresetCfg.coreSetType = 0;
+ pdcch->coresetCfg.coreSetSize = numRbs;
+ pdcch->coresetCfg.shiftIndex = cell->cellCfg.phyCellId;
+ pdcch->coresetCfg.precoderGranularity = 0; /* sameAsRegBundle */
pdcch->numDlDci = 1;
- pdcch->dci.rnti = raRnti; /* RA-RNTI */
- pdcch->dci.scramblingId = pci;
+ pdcch->dci.rnti = cell->raReq[ueId-1]->raRnti; /* RA-RNTI */
+ 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;
/* fill the PDSCH PDU */
uint8_t cwCount = 0;
pdsch->pduBitmap = 0; /* PTRS and CBG params are excluded */
- pdsch->rnti = raRnti; /* RA-RNTI */
+ pdsch->rnti = cell->raReq[ueId-1]->raRnti; /* RA-RNTI */
pdsch->pduIndex = 0;
pdsch->numCodewords = 1;
for(cwCount = 0; cwCount < pdsch->numCodewords; cwCount++)
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 */
+ /* RAR PDU length and FAPI payload header length */
+ tbSize = schCalcTbSize(RAR_PAYLOAD_SIZE + TX_PAYLOAD_HDR_LEN);
pdsch->codeword[cwCount].tbSize = tbSize;
}
- pdsch->dataScramblingId = pci;
+ pdsch->dataScramblingId = cell->cellCfg.phyCellId;
pdsch->numLayers = 1;
pdsch->transmissionScheme = 0;
pdsch->refPoint = 0;
- pdsch->dmrs.dlDmrsSymbPos = 2;
+ pdsch->dmrs.dlDmrsSymbPos = 4; /* Bitmap value 00000000000100 i.e. using 3rd symbol for PDSCH DMRS */
pdsch->dmrs.dmrsConfigType = 0; /* type-1 */
- pdsch->dmrs.dlDmrsScramblingId = pci;
+ 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; /* 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->pdschTimeAlloc.rowIndex = k0Index;
+ pdsch->pdschTimeAlloc.timeAlloc.startSymb = initialBwp->pdschCommon.timeDomRsrcAllocList[k0Index].startSymbol;
+ pdsch->pdschTimeAlloc.timeAlloc.numSymb = initialBwp->pdschCommon.timeDomRsrcAllocList[k0Index].lengthSymbol;
+
pdsch->pdschFreqAlloc.vrbPrbMapping = 0; /* non-interleaved */
- pdsch->pdschTimeAlloc.timeAlloc.startSymb = initialBwp->pdschCommon.startSymbol;
- pdsch->pdschTimeAlloc.timeAlloc.numSymb = initialBwp->pdschCommon.lengthSymbol;
+ pdsch->pdschFreqAlloc.resourceAllocType = 1; /* RAT type-1 RIV format */
+ pdsch->pdschFreqAlloc.freqAlloc.startPrb = MAX_NUM_RB;
+ pdsch->pdschFreqAlloc.freqAlloc.numPrb = \
+ schCalcNumPrb(tbSize, mcs, initialBwp->pdschCommon.timeDomRsrcAllocList[k0Index].lengthSymbol);
+
+ /* Find total symbols occupied including DMRS */
+ dmrsStartSymbol = findDmrsStartSymbol(pdsch->dmrs.dlDmrsSymbPos);
+ /* If there are no DRMS symbols, findDmrsStartSymbol() returns MAX_SYMB_PER_SLOT,
+ * in that case only PDSCH symbols are marked as occupied */
+ if(dmrsStartSymbol == MAX_SYMB_PER_SLOT)
+ {
+ startSymbol = pdsch->pdschTimeAlloc.timeAlloc.startSymb;
+ numSymbol = pdsch->pdschTimeAlloc.timeAlloc.numSymb;
+ }
+ /* If DMRS symbol is found, mark DMRS and PDSCH symbols as occupied */
+ else
+ {
+ startSymbol = dmrsStartSymbol;
+ numSymbol = pdsch->dmrs.nrOfDmrsSymbols + pdsch->pdschTimeAlloc.timeAlloc.numSymb;
+ }
+
+ /* Allocate the number of PRBs required for RAR PDSCH */
+ if((allocatePrbDl(cell, rarTime, startSymbol, numSymbol,\
+ &pdsch->pdschFreqAlloc.freqAlloc.startPrb, pdsch->pdschFreqAlloc.freqAlloc.numPrb)) != ROK)
+ {
+ DU_LOG("\nERROR --> SCH : allocatePrbDl() failed for RAR");
+ return RFAILED;
+ }
+
pdsch->beamPdschInfo.numPrgs = 1;
pdsch->beamPdschInfo.prgSize = 1;
pdsch->beamPdschInfo.digBfInterfaces = 0;
Code Review / o-du / l2.git / blobdiff