1 /*******************************************************************************
2 ################################################################################
3 # Copyright (c) [2017-2019] [Radisys] #
5 # Licensed under the Apache License, Version 2.0 (the "License"); #
6 # you may not use this file except in compliance with the License. #
7 # You may obtain a copy of the License at #
9 # http://www.apache.org/licenses/LICENSE-2.0 #
11 # Unless required by applicable law or agreed to in writing, software #
12 # distributed under the License is distributed on an "AS IS" BASIS, #
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. #
14 # See the License for the specific language governing permissions and #
15 # limitations under the License. #
16 ################################################################################
17 *******************************************************************************/
19 /************************************************************************
25 Desc: C source code for Entry point fucntions for slot indications
29 **********************************************************************/
31 /** @file sch_slot_ind.c
32 @brief This module processes slot indications
34 #include "common_def.h"
40 #include "du_app_mac_inf.h"
41 #include "mac_sch_interface.h"
43 #include "sch_utils.h"
45 SchMacDlAllocFunc schMacDlAllocOpts[] =
52 /*******************************************************************
54 * @brief Handles sending DL broadcast alloc to MAC
58 * Function : sendDlAllocToMac
61 * Sends DL Broadcast Resource Allocation to MAC from SCH
64 * @return ROK - success
67 * ****************************************************************/
68 uint8_t sendDlAllocToMac(DlSchedInfo *dlSchedInfo, Inst inst)
72 memset(&pst, 0, sizeof(Pst));
73 FILL_PST_SCH_TO_MAC(pst, inst);
74 pst.event = EVENT_DL_SCH_INFO;
76 return(*schMacDlAllocOpts[pst.selector])(&pst, dlSchedInfo);
80 /*******************************************************************
82 * @brief Handles slot indication at SCH
86 * Function : schCalcSlotValues
89 * Handles TTI indication received from PHY
92 * @return ROK - success
95 * ****************************************************************/
96 void schCalcSlotValues(SlotTimingInfo slotInd, SchSlotValue *schSlotValue)
98 /****************************************************************
99 * PHY_DELTA - the physical layer delta *
100 * SCHED_DELTA - scheduler schedules one slot ahead *
101 * BO_DELTA - this delay is considered for BO response and *
102 * RLC buffer packet to received at MAC *
103 * lower-mac (FAPI filling) will be working on PHY_DELTA *
104 * brdcast scheduler will working on PHY_DELTA + SCHED_DELTA *
105 * RAR scheduler will working on PHY_DELTA + SCHED_DELTA *
106 * msg4 scheduler will working on PHY_DELTA + SCHED_DELTA *
107 * dedicated DL msg scheduler will working *
108 * on PHY_DELTA + SCHED_DELTA + BO_DELTA *
109 ****************************************************************/
111 ADD_DELTA_TO_TIME(slotInd, schSlotValue->currentTime, PHY_DELTA_DL);
112 ADD_DELTA_TO_TIME(slotInd, schSlotValue->broadcastTime, PHY_DELTA_DL + SCHED_DELTA);
113 ADD_DELTA_TO_TIME(slotInd, schSlotValue->rarTime, PHY_DELTA_DL + SCHED_DELTA);
114 ADD_DELTA_TO_TIME(slotInd, schSlotValue->dlMsgTime, PHY_DELTA_DL + SCHED_DELTA);
117 /*******************************************************************
119 * @brief Checks if a slot is to be scheduled for SSB transmission
123 * Function : schCheckSsbOcc
126 * Checks if a slot is to be scheduled for SSB transmission
128 * @params[in] SlotTimingInfo slotTime
130 * @return Pdu transmission
132 * ****************************************************************/
133 PduTxOccsaion schCheckSsbOcc(SchCellCb *cell, SlotTimingInfo slotTime)
137 ssb_rep = cell->cellCfg.ssbSchCfg.ssbPeriod;
139 /* Identify SSB ocassion*/
140 if ((slotTime.sfn % SCH_MIB_TRANS == 0) && (slotTime.slot ==0))
142 return NEW_TRANSMISSION;
144 else if(cell->firstSsbTransmitted)
146 if((ssb_rep == 5) && ((slotTime.slot == 0 || slotTime.slot == 10)))
148 else if((slotTime.sfn % (ssb_rep/10) == 0) && slotTime.slot == 0)
151 /* not SSB occassion */
152 return NO_TRANSMISSION;
155 /*******************************************************************
157 * @brief Checks if a slot is to be scheduled for SIB1 transmission
161 * Function : schCheckSib1Occ
164 * Checks if a slot is to be scheduled for SIB1 transmission
166 * @params[in] SlotTimingInfo slotTime
168 * @return Pdu transmission
170 * ****************************************************************/
171 PduTxOccsaion schCheckSib1Occ(SchCellCb *cell, SlotTimingInfo slotTime)
173 /* Identify SIB1 occasions */
174 if((slotTime.sfn % SCH_SIB1_TRANS == 0) && (slotTime.slot ==0))
176 return NEW_TRANSMISSION;
178 else if(cell->firstSib1Transmitted)
180 if((slotTime.sfn % (cell->cellCfg.sib1SchCfg.sib1RepetitionPeriod/10) == 0) &&
181 (slotTime.slot == 0))
186 /* not SIB1 occassion */
187 return NO_TRANSMISSION;
190 /*******************************************************************
192 * @brief find correct combination of k0-k1 value
196 * Function : findValidK0K1Value
199 * find correct combination of k0-k1 value
202 * @return ROK - success
205 *******************************************************************/
206 bool findValidK0K1Value(SchCellCb *cell, SlotTimingInfo currTime, uint8_t ueId, bool dedMsg, uint8_t *pdschStartSymbol, uint8_t *pdschSymblLen, SlotTimingInfo *pdcchTime, SlotTimingInfo *pdschTime, SlotTimingInfo *pucchTime)
208 uint8_t numK0 = 0, k0TblIdx = 0, k0Val = 0, k0Index =0 ;
209 uint8_t k1TblIdx = 0, k1Index = 0, k1Val = 0, numK1 = 0;
210 SchUeCb *ueCb = NULLP;
211 SchK0K1TimingInfoTbl *k0K1InfoTbl;
213 ADD_DELTA_TO_TIME(currTime, (*pdcchTime), PHY_DELTA_DL + SCHED_DELTA);
215 if(schGetSlotSymbFrmt(pdcchTime->slot, cell->slotFrmtBitMap) != DL_SLOT)
217 /* If it is not a DL slot, cannot schedule PDCCH. Return from here. */
222 if(cell->schDlSlotInfo[pdcchTime->slot]->pdcchUe != 0)
229 ueCb = &cell->ueCb[ueId-1];
230 k0K1InfoTbl = &ueCb->ueCfg.spCellCfg.servCellCfg.initDlBwp.k0K1InfoTbl;
234 k0K1InfoTbl = &cell->cellCfg.schInitialDlBwp.k0K1InfoTbl;
237 numK0 = k0K1InfoTbl->k0k1TimingInfo[pdcchTime->slot].numK0;
238 for(k0TblIdx = 0; k0TblIdx < numK0; k0TblIdx++)
240 k0Index = k0K1InfoTbl->k0k1TimingInfo[pdcchTime->slot].k0Indexes[k0TblIdx].k0Index;
243 k0Val = cell->cellCfg.schInitialDlBwp.pdschCommon.timeDomRsrcAllocList[k0Index].k0;
244 *pdschStartSymbol = cell->cellCfg.schInitialDlBwp.pdschCommon.timeDomRsrcAllocList[k0Index].startSymbol;
245 *pdschSymblLen = cell->cellCfg.schInitialDlBwp.pdschCommon.timeDomRsrcAllocList[k0Index].lengthSymbol;
249 if(ueCb->ueCfg.spCellCfg.servCellCfg.initDlBwp.pdschCfg.timeDomRsrcAllociList[k0Index].k0 != NULLP)
251 k0Val = *(ueCb->ueCfg.spCellCfg.servCellCfg.initDlBwp.pdschCfg.timeDomRsrcAllociList[k0Index].k0);
252 *pdschStartSymbol = ueCb->ueCfg.spCellCfg.servCellCfg.initDlBwp.pdschCfg.timeDomRsrcAllociList[k0Index].startSymbol;
253 *pdschSymblLen = ueCb->ueCfg.spCellCfg.servCellCfg.initDlBwp.pdschCfg.timeDomRsrcAllociList[k0Index].symbolLength;
257 ADD_DELTA_TO_TIME((*pdcchTime), (*pdschTime), k0Val);
259 if(schGetSlotSymbFrmt(pdschTime->slot, cell->slotFrmtBitMap) != DL_SLOT)
264 if(cell->schDlSlotInfo[pdschTime->slot]->pdschUe != 0)
269 numK1 = k0K1InfoTbl->k0k1TimingInfo[pdcchTime->slot].k0Indexes[k0TblIdx].k1TimingInfo.numK1;
270 for(k1TblIdx = 0; k1TblIdx < numK1; k1TblIdx++)
272 k1Index = k0K1InfoTbl->k0k1TimingInfo[pdcchTime->slot].k0Indexes[k0TblIdx].k1TimingInfo.k1Indexes[k1TblIdx];
275 k1Val = defaultUlAckTbl[k1Index];
279 if(ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.pucchCfg.dlDataToUlAck)
281 k1Val = ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.pucchCfg.dlDataToUlAck->dlDataToUlAckList[k1Index];
284 ADD_DELTA_TO_TIME((*pdschTime),(*pucchTime), k1Val);
286 if(schGetSlotSymbFrmt(pucchTime->slot, cell->slotFrmtBitMap) == DL_SLOT)
291 if(cell->schUlSlotInfo[pucchTime->slot]->pucchUe != 0)
301 /*******************************************************************
307 * Function : schFillBoGrantDlSchedInfo
313 * @return ROK - success
316 * ****************************************************************/
317 bool schFillBoGrantDlSchedInfo(SchCellCb *cell, SlotTimingInfo currTime, uint8_t ueId)
320 uint8_t pdschNumSymbols = 0, pdschStartSymbol = 0;
321 uint16_t startPrb = 0, maxFreePRB = 0;
322 uint16_t crnti = 0, mcsIdx = 0;
323 uint32_t accumalatedSize = 0;
324 SchUeCb *ueCb = NULLP;
325 CmLListCp *lcLL = NULLP;
326 DlMsgAlloc *dciSlotAlloc, *dlMsgAlloc;
327 SlotTimingInfo pdcchTime, pdschTime, pucchTime;
329 /* TX_PAYLOAD_HDR_LEN: Overhead which is to be Added once for any UE while estimating Accumulated TB Size
330 * Following flag added to keep the record whether TX_PAYLOAD_HDR_LEN is added to the first Node getting allocated.
331 * If both Dedicated and Default LC lists are present then First LC in Dedicated List will include this overhead
332 * else if only Default list is present then first node in this List will add this overhead len*/
333 bool isTxPayloadLenAdded = FALSE;
335 GET_CRNTI(crnti,ueId);
336 ueCb = &cell->ueCb[ueId-1];
338 if(findValidK0K1Value(cell, currTime, ueId, ueCb->ueCfg.spCellCfg.servCellCfg.initDlBwp.k0K1TblPrsnt,\
339 &pdschStartSymbol, &pdschNumSymbols, &pdcchTime, &pdschTime, &pucchTime) != true )
341 /* If a valid combination of slots to scheduled PDCCH, PDSCH and PUCCH is
342 * not found, do not perform resource allocation. Return from here. */
346 /* allocate PDCCH and PDSCH resources for the ue */
347 if(cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId-1] == NULL)
350 SCH_ALLOC(dciSlotAlloc, sizeof(DlMsgAlloc));
353 DU_LOG("\nERROR --> SCH : Memory Allocation failed for ded DL msg alloc");
356 cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId -1] = dciSlotAlloc;
357 memset(dciSlotAlloc, 0, sizeof(DlMsgAlloc));
358 dciSlotAlloc->crnti = crnti;
360 dciSlotAlloc = cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId -1];
362 /* Dl ded Msg info is copied, this was earlier filled in macSchDlRlcBoInfo */
363 fillDlMsgInfo(&dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].dlMsgInfo, dciSlotAlloc->crnti);
365 /*Re-Initalization per UE*/
366 /* scheduled LC data fill */
367 dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].numLc = 0;
368 isTxPayloadLenAdded = FALSE; /*Re-initlaize the flag for every UE*/
371 for(lcIdx = 0; lcIdx < MAX_NUM_LC; lcIdx++)
373 if(ueCb->dlInfo.dlLcCtxt[lcIdx].bo)
375 /*Check the LC is Dedicated or default and accordingly LCList will
377 if(ueCb->dlInfo.dlLcCtxt[lcIdx].isDedicated)
379 lcLL = &(ueCb->dlLcPrbEst.dedLcInfo->dedLcList);
383 lcLL = &(ueCb->dlLcPrbEst.defLcList);
386 /*[Step2]: Update the reqPRB and Payloadsize for this LC in the appropriate List*/
387 if(updateLcListReqPRB(lcLL, ueCb->dlInfo.dlLcCtxt[lcIdx].lcId,\
388 (ueCb->dlInfo.dlLcCtxt[lcIdx].bo + MAC_HDR_SIZE)) != ROK)
390 DU_LOG("\nERROR --> SCH : Updation in LC List Failed");
391 /* Free the dl ded msg info allocated in macSchDlRlcBoInfo */
392 if(dciSlotAlloc->numSchedInfo == 0)
394 SCH_FREE(dciSlotAlloc, sizeof(DlMsgAlloc));
395 cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId -1] = NULL;
398 memset(&dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], 0, sizeof(DlMsgSchInfo));
402 ueCb->dlInfo.dlLcCtxt[lcIdx].bo = 0;
406 if ((ueCb->dlLcPrbEst.defLcList.count == 0) && \
407 ((ueCb->dlLcPrbEst.dedLcInfo != NULL) && (ueCb->dlLcPrbEst.dedLcInfo->dedLcList.count == 0)))
409 DU_LOG("\nDEBUG --> SCH : No pending BO for any LC id\n");
410 if(*(uint8_t *)cell->ueToBeScheduled.first->node == ueId)
412 SCH_FREE(cell->ueToBeScheduled.first->node, sizeof(uint8_t));
413 deleteNodeFromLList(&cell->ueToBeScheduled, cell->ueToBeScheduled.first);
415 UNSET_ONE_BIT(ueId, cell->boIndBitMap);
417 /* Free the dl ded msg info allocated in macSchDlRlcBoInfo */
418 if(dciSlotAlloc->numSchedInfo == 0)
420 SCH_FREE(dciSlotAlloc, sizeof(DlMsgAlloc));
421 cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId -1] = NULL;
424 memset(&dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], 0, sizeof(DlMsgSchInfo));
428 /*[Step3]: Calculate Best FREE BLOCK with MAX PRB count*/
429 maxFreePRB = searchLargestFreeBlockDL(cell, pdschTime, &startPrb);
431 /*[Step4]: Estimation of PRB and BO which can be allocated to each LC in
432 * the list based on RRM policy*/
434 /*Either this UE contains no reservedPRB pool fir dedicated S-NSSAI or
435 * Num of Free PRB available is not enough to reserve Dedicated PRBs*/
438 mcsIdx = ueCb->ueCfg.dlModInfo.mcsIndex;
439 if((ueCb->dlLcPrbEst.dedLcInfo == NULLP)
440 || ((maxFreePRB < ueCb->dlLcPrbEst.dedLcInfo->rsvdDedicatedPRB)))
442 ueCb->dlLcPrbEst.sharedNumPrb = maxFreePRB;
443 DU_LOG("\nWARNING --> SCH : Only Default Slice is scheduled, sharedPRB Count:%d",\
444 ueCb->dlLcPrbEst.sharedNumPrb);
446 /*PRB Alloc for Default LCs*/
447 prbAllocUsingRRMPolicy(&(ueCb->dlLcPrbEst.defLcList), FALSE, mcsIdx, pdschNumSymbols,\
448 &(ueCb->dlLcPrbEst.sharedNumPrb), NULLP, &isTxPayloadLenAdded);
452 ueCb->dlLcPrbEst.sharedNumPrb = maxFreePRB - ueCb->dlLcPrbEst.dedLcInfo->rsvdDedicatedPRB;
454 /*PRB Alloc for Dedicated LCs*/
455 prbAllocUsingRRMPolicy(&(ueCb->dlLcPrbEst.dedLcInfo->dedLcList), TRUE, mcsIdx, pdschNumSymbols,\
456 &(ueCb->dlLcPrbEst.sharedNumPrb), &(ueCb->dlLcPrbEst.dedLcInfo->rsvdDedicatedPRB), &isTxPayloadLenAdded);
458 /*PRB Alloc for Default LCs*/
459 prbAllocUsingRRMPolicy(&(ueCb->dlLcPrbEst.defLcList), FALSE, mcsIdx, pdschNumSymbols, \
460 &(ueCb->dlLcPrbEst.sharedNumPrb), &(ueCb->dlLcPrbEst.dedLcInfo->rsvdDedicatedPRB), &isTxPayloadLenAdded);
464 /*[Step5]:Traverse each LCID in LcList to calculate the exact Scheduled Bytes
465 * using allocated BO per LC and Update dlMsgAlloc(BO report for MAC*/
466 if(ueCb->dlLcPrbEst.dedLcInfo != NULLP)
467 updateGrantSizeForBoRpt(&(ueCb->dlLcPrbEst.dedLcInfo->dedLcList), dciSlotAlloc, &(accumalatedSize));
469 updateGrantSizeForBoRpt(&(ueCb->dlLcPrbEst.defLcList), dciSlotAlloc, &(accumalatedSize));
471 /*Below case will hit if NO LC(s) are allocated due to resource crunch*/
472 if (!accumalatedSize)
476 DU_LOG("\nERROR --> SCH : NO FREE PRB!!");
480 /*Schedule the LC for next slot*/
481 DU_LOG("\nDEBUG --> SCH : No LC has been scheduled");
483 /* Not Freeing dlMsgAlloc as ZERO BO REPORT to be sent to RLC so that
484 * Allocation can be done in next slot*/
488 /*[Step6]: pdcch and pdsch data is filled */
489 if((schDlRsrcAllocDlMsg(cell, pdschTime, crnti, accumalatedSize, dciSlotAlloc, startPrb, pdschStartSymbol, pdschNumSymbols)) != ROK)
491 DU_LOG("\nERROR --> SCH : Scheduling of DL dedicated message failed");
493 /* Free the dl ded msg info allocated in macSchDlRlcBoInfo */
494 if(dciSlotAlloc->numSchedInfo == 0)
496 SCH_FREE(dciSlotAlloc, sizeof(DlMsgAlloc));
497 cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId -1] = NULL;
500 memset(&dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], 0, sizeof(DlMsgSchInfo));
504 /* TODO : Update the scheduling byte report for multiple LC based on QCI
506 /* As of now, the total number of bytes scheduled for a slot is divided
507 * equally amongst all LC with pending data. This is avoid starving of any
511 accumalatedSize = accumalatedSize/dlMsgAlloc->numLc;
512 for(lcIdx = 0; lcIdx < dlMsgAlloc->numLc; lcIdx ++)
513 dlMsgAlloc->lcSchInfo[lcIdx].schBytes = accumalatedSize;
516 /* Check if both DCI and DL_MSG are sent in the same slot.
517 * If not, allocate memory for DL_MSG PDSCH slot to store PDSCH info */
519 if(pdcchTime.slot == pdschTime.slot)
521 dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].pduPres = BOTH;
522 dciSlotAlloc->numSchedInfo++;
526 /* Allocate memory to schedule dlMsgAlloc to send DL_Msg, pointer will be checked at schProcessSlotInd() */
527 if(cell->schDlSlotInfo[pdschTime.slot]->dlMsgAlloc[ueId-1] == NULLP)
529 SCH_ALLOC(dlMsgAlloc, sizeof(DlMsgAlloc));
530 if(dlMsgAlloc == NULLP)
532 DU_LOG("\nERROR --> SCH : Memory Allocation failed for dlMsgAlloc");
533 if(dciSlotAlloc->numSchedInfo == 0)
535 SCH_FREE(dciSlotAlloc, sizeof(DlMsgAlloc));
536 cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId-1] = NULLP;
539 memset(&dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], 0, sizeof(DlMsgSchInfo));
542 cell->schDlSlotInfo[pdschTime.slot]->dlMsgAlloc[ueId-1] = dlMsgAlloc;
543 memset(dlMsgAlloc, 0, sizeof(DlMsgAlloc));
544 dlMsgAlloc->crnti = dciSlotAlloc->crnti;
547 dlMsgAlloc = cell->schDlSlotInfo[pdschTime.slot]->dlMsgAlloc[ueId-1];
549 /* Copy all DL_MSG info */
550 memcpy(&dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo], \
551 &dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], sizeof(DlMsgSchInfo));
552 dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo].dlMsgPdcchCfg.dci.pdschCfg = \
553 &dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo].dlMsgPdschCfg;
555 /* Assign correct PDU types in corresponding slots */
556 dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo].pduPres = PDSCH_PDU;
557 dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].pduPres = PDCCH_PDU;
558 dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].pdschSlot = pdschTime.slot;
560 dciSlotAlloc->numSchedInfo++;
561 dlMsgAlloc->numSchedInfo++;
564 schAllocPucchResource(cell, pucchTime, crnti);
565 cell->schDlSlotInfo[pdcchTime.slot]->pdcchUe = ueId;
566 cell->schDlSlotInfo[pdschTime.slot]->pdschUe = ueId;
567 cell->schUlSlotInfo[pucchTime.slot]->pucchUe = ueId;
569 /* after allocation is done, unset the bo bit for that ue */
570 UNSET_ONE_BIT(ueId, cell->boIndBitMap);
575 /*******************************************************************
577 * @brief Handles slot indication at SCH
581 * Function : schProcessSlotInd
584 * Handles TTI indication received from PHY
587 * @return ROK - success
590 * ****************************************************************/
591 uint8_t schProcessSlotInd(SlotTimingInfo *slotInd, Inst schInst)
593 uint8_t ueId, ueIdx, lcgIdx, ret = ROK;
595 bool isRarPending = false, isRarScheduled = false;
596 bool isMsg4Pending = false, isMsg4Scheduled = false;
597 CmLList *pendingUeNode;
598 DlSchedInfo dlSchedInfo;
599 DlBrdcstAlloc *dlBrdcstAlloc = NULLP;
600 SchCellCb *cell = NULLP;
602 memset(&dlSchedInfo, 0, sizeof(DlSchedInfo));
603 schCalcSlotValues(*slotInd, &dlSchedInfo.schSlotValue);
604 dlBrdcstAlloc = &dlSchedInfo.brdcstAlloc;
605 dlBrdcstAlloc->ssbTrans = NO_TRANSMISSION;
606 dlBrdcstAlloc->sib1Trans = NO_TRANSMISSION;
608 cell = schCb[schInst].cells[schInst];
611 DU_LOG("\nERROR --> SCH : Cell Does not exist");
614 memcpy(&cell->slotInfo, slotInd, sizeof(SlotTimingInfo));
615 dlBrdcstAlloc->ssbIdxSupported = SSB_IDX_SUPPORTED;
617 dlSchedInfo.cellId = cell->cellId;
618 slot = dlSchedInfo.schSlotValue.broadcastTime.slot;
620 /* Check for SSB occassion */
621 dlBrdcstAlloc->ssbTrans = schCheckSsbOcc(cell, dlSchedInfo.schSlotValue.broadcastTime);
622 if(dlBrdcstAlloc->ssbTrans)
624 if(schBroadcastSsbAlloc(cell, dlSchedInfo.schSlotValue.broadcastTime, dlBrdcstAlloc) != ROK)
626 DU_LOG("\nERROR --> SCH : schBroadcastSsbAlloc failed");
627 dlBrdcstAlloc->ssbTrans = NO_TRANSMISSION;
631 dlSchedInfo.isBroadcastPres = true;
632 if((dlBrdcstAlloc->ssbTrans == NEW_TRANSMISSION) && (!cell->firstSsbTransmitted))
633 cell->firstSsbTransmitted = true;
637 /* Check for SIB1 occassion */
638 dlBrdcstAlloc->sib1Trans = schCheckSib1Occ(cell, dlSchedInfo.schSlotValue.broadcastTime);
639 if(dlBrdcstAlloc->sib1Trans)
641 if(schBroadcastSib1Alloc(cell, dlSchedInfo.schSlotValue.broadcastTime, dlBrdcstAlloc) != ROK)
643 DU_LOG("\nERROR --> SCH : schBroadcastSib1Alloc failed");
644 dlBrdcstAlloc->sib1Trans = NO_TRANSMISSION;
648 dlSchedInfo.isBroadcastPres = true;
649 if((dlBrdcstAlloc->sib1Trans == NEW_TRANSMISSION) && (!cell->firstSib1Transmitted))
650 cell->firstSib1Transmitted = true;
654 /* Select first UE in the linked list to be scheduled next */
655 pendingUeNode = cell->ueToBeScheduled.first;
658 ueId = *(uint8_t *)(pendingUeNode->node);
660 /* If RAR is pending for this UE, schedule PDCCH,PDSCH to send RAR and
661 * PUSCH to receive MSG3 as per k0-k2 configuration*/
662 if(cell->raReq[ueId-1] != NULLP)
665 isRarScheduled = schProcessRaReq(cell, *slotInd, ueId);
668 /* If MSG4 is pending for this UE, schedule PDCCH,PDSCH to send MSG4 and
669 * PUCCH to receive UL msg as per k0-k1 configuration */
670 if(cell->raCb[ueId-1].msg4recvd)
672 isMsg4Pending = true;
673 isMsg4Scheduled = schProcessMsg4Req(cell, *slotInd, ueId);
676 if(isRarPending || isMsg4Pending)
678 /* If RAR or MSG is successfully scheduled then
679 * remove UE from linked list since no pending msgs for this UE */
680 if(isRarScheduled || isMsg4Scheduled)
682 SCH_FREE(pendingUeNode->node, sizeof(uint8_t));
683 deleteNodeFromLList(&cell->ueToBeScheduled, pendingUeNode);
685 /* If RAR/MSG4 is pending but couldnt be scheduled then,
686 * put this UE at the end of linked list to be scheduled later */
689 cmLListAdd2Tail(&cell->ueToBeScheduled, cmLListDelFrm(&cell->ueToBeScheduled, pendingUeNode));
693 if((cell->boIndBitMap) & (1<<ueId))
695 if(schFillBoGrantDlSchedInfo(cell, *slotInd, ueId) == true)
697 SCH_FREE(pendingUeNode->node, sizeof(uint8_t));
698 deleteNodeFromLList(&cell->ueToBeScheduled, pendingUeNode);
703 /* Check if any PDU is scheduled at this slot for any UE */
704 for(ueIdx=0; ueIdx<MAX_NUM_UE; ueIdx++)
706 /* If RAR PDCCH/PDSCH is scheduled for a UE at this slot, fill RAR specific interface
707 * structure to send to MAC */
708 if(cell->schDlSlotInfo[dlSchedInfo.schSlotValue.rarTime.slot]->rarAlloc[ueIdx] != NULLP)
710 slot = dlSchedInfo.schSlotValue.rarTime.slot;
711 dlSchedInfo.rarAlloc[ueIdx] = cell->schDlSlotInfo[slot]->rarAlloc[ueIdx];
712 cell->schDlSlotInfo[slot]->rarAlloc[ueIdx] = NULLP;
715 /* If DL-Msg PDCCH/PDSCH is scheduled for a UE at this slot, fill
716 * specific interface structure to send to MAC */
717 if(cell->schDlSlotInfo[dlSchedInfo.schSlotValue.dlMsgTime.slot]->dlMsgAlloc[ueIdx] != NULLP)
719 slot = dlSchedInfo.schSlotValue.dlMsgTime.slot;
720 dlSchedInfo.dlMsgAlloc[ueIdx] = cell->schDlSlotInfo[slot]->dlMsgAlloc[ueIdx];
721 cell->schDlSlotInfo[slot]->dlMsgAlloc[ueIdx] = NULLP;
726 /* Check if UL grant must be sent in this slot for a SR/BSR that had been received */
727 for(ueIdx=0; ueIdx<cell->numActvUe; ueIdx++)
729 uint32_t totDataReq = 0; /* in bytes */
730 DciInfo *dciInfo = NULLP;
731 SchUeCb *ueCb = NULLP;
733 ueCb = &cell->ueCb[ueIdx];
737 totDataReq = UL_GRANT_SIZE; /*fixing so that all control msgs can be handled in SR */
738 ueCb->srRcvd = false;
741 for(lcgIdx=0; lcgIdx<MAX_NUM_LOGICAL_CHANNEL_GROUPS; lcgIdx++)
743 totDataReq+= ueCb->bsrInfo[lcgIdx].dataVol;
744 ueCb->bsrInfo[lcgIdx].dataVol = 0;
746 if(totDataReq > 0) /* UL grant must be provided for this UE in this slot */
748 SchPuschInfo schPuschInfo;
749 memset(&schPuschInfo, 0, sizeof(SchPuschInfo));
751 SCH_ALLOC(dciInfo, sizeof(DciInfo));
754 DU_LOG("\nERROR --> SCH : Memory Allocation failed for dciInfo alloc");
757 memset(dciInfo,0,sizeof(DciInfo));
759 /* update the SFN and SLOT */
760 memcpy(&dlSchedInfo.schSlotValue.ulDciTime, slotInd, sizeof(SlotTimingInfo));
762 /* Update PUSCH allocation */
763 schFillPuschAlloc(ueCb, dlSchedInfo.schSlotValue.ulDciTime, totDataReq, &schPuschInfo);
765 /* Fill DCI for UL grant */
766 schFillUlDci(ueCb, schPuschInfo, dciInfo);
767 memcpy(&dciInfo->slotIndInfo, &dlSchedInfo.schSlotValue.ulDciTime, sizeof(SlotTimingInfo));
768 dlSchedInfo.ulGrant = dciInfo;
772 /* Send msg to MAC */
773 ret = sendDlAllocToMac(&dlSchedInfo, schInst);
776 DU_LOG("\nERROR --> SCH : Sending DL Broadcast allocation from SCH to MAC failed");
780 schInitDlSlot(cell->schDlSlotInfo[slot]);
781 schUlResAlloc(cell, schInst);
786 /**********************************************************************
788 **********************************************************************/