Renaming UE IDX to UE ID in SCH and its interfaces [Issue-ID: ODUHIGH-401]
[o-du/l2.git] / src / 5gnrsch / sch_common.c
index 358347d..4907c77 100644 (file)
@@ -320,12 +320,14 @@ uint8_t fillUlSchedPucchFormat(uint8_t pucchFormat, SchPucchInfo *ulSchedPucch,\
  *  @return  void
  **/
 
-uint8_t fillUlSchedPucchDedicatedCfg(uint16_t numSlots, SchPucchCfg *pucchDedCfg,\
+uint8_t fillUlSchedPucchDedicatedCfg(SchCellCb *cell, SchPucchCfg *pucchDedCfg,\
    SlotTimingInfo *slotInfo, SchPucchInfo *ulSchedPucch)
 {
    uint8_t ret, resrcSetIdx, resrcIdx, schedReqIdx, srPeriodicity = 0;
    uint16_t srOffset = 0;
-
+   uint16_t numSlots = cell->numSlots;
+   bool isAllocated = false;
+   uint16_t pucchStartPrb;
    ret = ROK;
    if(pucchDedCfg->resrcSet && pucchDedCfg->resrc)
    {
@@ -335,20 +337,31 @@ uint8_t fillUlSchedPucchDedicatedCfg(uint16_t numSlots, SchPucchCfg *pucchDedCfg
          for(resrcIdx = 0; resrcIdx < pucchDedCfg->resrc->resrcToAddModListCount; resrcIdx++)
          {
             if(pucchDedCfg->resrcSet->resrcSetToAddModList[resrcSetIdx].resrcList[resrcSetIdx] ==\
-              pucchDedCfg->resrc->resrcToAddModList[resrcIdx].resrcId)
-           {
+                  pucchDedCfg->resrc->resrcToAddModList[resrcIdx].resrcId)
+            {
                ulSchedPucch->intraFreqHop = pucchDedCfg->resrc->resrcToAddModList[resrcIdx].intraFreqHop;
                ulSchedPucch->secondPrbHop = pucchDedCfg->resrc->resrcToAddModList[resrcIdx].secondPrbHop;
                ulSchedPucch->fdAlloc.startPrb = pucchDedCfg->resrc->resrcToAddModList[resrcIdx].startPrb;
-              ulSchedPucch->pucchFormat = pucchDedCfg->resrc->resrcToAddModList[resrcIdx].pucchFormat;
-              ret = fillUlSchedPucchFormat(ulSchedPucch->pucchFormat, ulSchedPucch,\
-                       &pucchDedCfg->resrc->resrcToAddModList[resrcIdx], NULLP);
-              if(ret == RFAILED)
-                 return ret;
-           }
+               ulSchedPucch->pucchFormat = pucchDedCfg->resrc->resrcToAddModList[resrcIdx].pucchFormat;
+               ret = fillUlSchedPucchFormat(ulSchedPucch->pucchFormat, ulSchedPucch,\
+                     &pucchDedCfg->resrc->resrcToAddModList[resrcIdx], NULLP);
+               if(ret == RFAILED)
+                  return ret;
+
+               pucchStartPrb = pucchDedCfg->resrc->resrcToAddModList[resrcIdx].startPrb;
+               ret = allocatePrbUl(cell, *slotInfo, ulSchedPucch->tdAlloc.startSymb, ulSchedPucch->tdAlloc.numSymb, &pucchStartPrb, PUCCH_NUM_PRB_FORMAT_0_1_4);
+               if(ret == ROK)
+               {
+                  isAllocated = true;
+                  break;
+               }
+            }
          }
+         if(isAllocated)
+         break;
       }
    }
+
    if(pucchDedCfg->format1)
    {
       memset(&ulSchedPucch->cmnFormatCfg, 0, sizeof(SchPucchFormatCfg));
@@ -356,7 +369,12 @@ uint8_t fillUlSchedPucchDedicatedCfg(uint16_t numSlots, SchPucchCfg *pucchDedCfg
       if(ret == RFAILED)
          return ret;
    }
-   
+
+   if(!isAllocated)
+   {
+      return RFAILED;
+   }
+
    /* setting SR and UCI flag */
    if(pucchDedCfg->schedReq)
    {
@@ -388,19 +406,21 @@ uint8_t fillUlSchedPucchDedicatedCfg(uint16_t numSlots, SchPucchCfg *pucchDedCfg
  *  @return  ROK/RFAILED
  **/
 
-uint16_t fillPucchResourceInfo(SchPucchInfo *schPucchInfo, Inst inst)
+uint16_t fillPucchResourceInfo(SchPucchInfo *schPucchInfo, Inst inst, SlotTimingInfo slotInfo)
 {
-   uint8_t ret = ROK, ueIdx = 0, pucchIdx = 0;
+   uint8_t ret = ROK, ueId = 0, ueIdx = 0, pucchIdx = 0;
    SchCellCb  *cell = schCb[inst].cells[inst];
    SchPucchCfgCmn *pucchCfg = NULLP;
    SchBwpParams *ulBwp = NULLP;
+   uint16_t startPrb;
 
-   GET_UE_IDX(schPucchInfo->rnti, ueIdx);
+   GET_UE_ID(schPucchInfo->rnti, ueId);
+   ueIdx = ueId -1;
    if(cell->ueCb[ueIdx].ueCfg.spCellCfg.servCellCfg.initUlBwp.pucchCfgPres)
    {
       /* fill pucch dedicated cfg */
-      ret = fillUlSchedPucchDedicatedCfg(cell->numSlots,\
-       &cell->ueCb[ueIdx].ueCfg.spCellCfg.servCellCfg.initUlBwp.pucchCfg, &cell->slotInfo, schPucchInfo);
+      ret = fillUlSchedPucchDedicatedCfg(cell,\
+       &cell->ueCb[ueIdx].ueCfg.spCellCfg.servCellCfg.initUlBwp.pucchCfg, &slotInfo, schPucchInfo);
       if(ret == RFAILED)
       {
          memset(schPucchInfo, 0, sizeof(SchPucchInfo));
@@ -415,15 +435,21 @@ uint16_t fillPucchResourceInfo(SchPucchInfo *schPucchInfo, Inst inst)
       pucchCfg = &cell->cellCfg.schInitialUlBwp.pucchCommon;
       pucchIdx = pucchCfg->pucchResourceCommon;
       ulBwp = &cell->cellCfg.schInitialUlBwp.bwp;
-      schPucchInfo->fdAlloc.startPrb = ulBwp->freqAlloc.startPrb + pucchResourceSet[pucchIdx][3];
-      schPucchInfo->fdAlloc.numPrb = PUCCH_NUM_PRB_FORMAT_0_1_4;
-      schPucchInfo->tdAlloc.startSymb = pucchResourceSet[pucchIdx][1];
-      schPucchInfo->tdAlloc.numSymb = pucchResourceSet[pucchIdx][2];
-      schPucchInfo->pucchFormat = pucchResourceSet[pucchIdx][0];
-
-      /* set SR and UCI flag to false */
-      schPucchInfo->srFlag  = true;
-      schPucchInfo->uciFlag = true;
+      startPrb = ulBwp->freqAlloc.startPrb + pucchResourceSet[pucchIdx][3];
+      ret = allocatePrbUl(cell, slotInfo, pucchResourceSet[pucchIdx][1], pucchResourceSet[pucchIdx][2],\
+            &startPrb, PUCCH_NUM_PRB_FORMAT_0_1_4);
+      if (ret == ROK)
+      {
+         schPucchInfo->fdAlloc.startPrb = ulBwp->freqAlloc.startPrb + pucchResourceSet[pucchIdx][3];
+         schPucchInfo->fdAlloc.numPrb = PUCCH_NUM_PRB_FORMAT_0_1_4;
+         schPucchInfo->tdAlloc.startSymb = pucchResourceSet[pucchIdx][1];
+         schPucchInfo->tdAlloc.numSymb = pucchResourceSet[pucchIdx][2];
+         schPucchInfo->pucchFormat = pucchResourceSet[pucchIdx][0];
+
+         /* set SR and UCI flag to false */
+         schPucchInfo->srFlag  = true;
+         schPucchInfo->uciFlag = true;
+      }
    }
    /* set HARQ flag to true */
    schPucchInfo->harqFlag = true;
@@ -477,10 +503,13 @@ uint8_t schUlResAlloc(SchCellCb *cell, Inst schInst)
 
    if(schUlSlotInfo->pucchPres)
    {
-      ulSchedInfo.dataType |= SCH_DATATYPE_UCI;
-      fillPucchResourceInfo(&schUlSlotInfo->schPucchInfo, schInst);
-      memcpy(&ulSchedInfo.schPucchInfo, &schUlSlotInfo->schPucchInfo,
-           sizeof(SchPucchInfo));
+      ret = fillPucchResourceInfo(&schUlSlotInfo->schPucchInfo, schInst, ulTimingInfo);
+      if (ret == ROK)
+      {
+         ulSchedInfo.dataType |= SCH_DATATYPE_UCI;
+         memcpy(&ulSchedInfo.schPucchInfo, &schUlSlotInfo->schPucchInfo,
+               sizeof(SchPucchInfo));
+      }
       memset(&schUlSlotInfo->schPucchInfo, 0, sizeof(SchPucchInfo));
    }
 
@@ -511,7 +540,8 @@ uint8_t schUlResAlloc(SchCellCb *cell, Inst schInst)
  *         RFAILED - failure
  *
  * ****************************************************************/
-uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc *msg4Alloc)
+uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo msg4Time, uint8_t ueId, DlMsgAlloc *dlMsgAlloc,\
+uint8_t pdschStartSymbol, uint8_t pdschNumSymbols)
 {
    uint8_t coreset0Idx = 0;
    uint8_t firstSymbol = 0;
@@ -524,6 +554,7 @@ uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc
    PdcchCfg *pdcch = NULLP;
    PdschCfg *pdsch = NULLP;
    BwpCfg *bwp = NULLP;
+   DlMsgSchInfo *msg4Alloc = NULLP;
 
    if(cell == NULL)
    {
@@ -531,18 +562,22 @@ uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc
       return RFAILED;
    }
 
-   if(msg4Alloc == NULL)
+   if(dlMsgAlloc == NULL)
    {
-      DU_LOG("\nERROR  -->  SCH: schDlRsrcAllocMsg4() :  msg4Alloc is NULL");
+      DU_LOG("\nERROR  -->  SCH: schDlRsrcAllocMsg4() :  dlMsgAlloc is NULL");
       return RFAILED;
    }
 
+   msg4Alloc = &dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo];
+   initialBwp   = &cell->cellCfg.schInitialDlBwp;
    pdcch = &msg4Alloc->dlMsgPdcchCfg;
    pdsch = &msg4Alloc->dlMsgPdschCfg;
    bwp = &msg4Alloc->bwp;
-   initialBwp   = &cell->cellCfg.schInitialDlBwp;
    coreset0Idx  = initialBwp->pdcchCommon.commonSearchSpace.coresetId;
 
+   fillDlMsgInfo(&msg4Alloc->dlMsgInfo, cell->raCb[ueId-1].tcrnti);
+   msg4Alloc->dlMsgInfo.dlMsgPduLen = cell->raCb[ueId-1].dlMsgPduLen;
+
    /* derive the sib1 coreset0 params from table 13-1 spec 38.213 */
    numRbs     = coresetIdxTable[coreset0Idx][1];
    numSymbols = coresetIdxTable[coreset0Idx][2];
@@ -577,7 +612,7 @@ uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc
    pdcch->coresetCfg.shiftIndex = cell->cellCfg.phyCellId;
    pdcch->coresetCfg.precoderGranularity = 0; /* sameAsRegBundle */
    pdcch->numDlDci = 1;
-   pdcch->dci.rnti = cell->schDlSlotInfo[slotTime.slot]->dlMsgInfo->crnti;
+   pdcch->dci.rnti = cell->raCb[ueId-1].tcrnti;
    pdcch->dci.scramblingId = cell->cellCfg.phyCellId;
    pdcch->dci.scramblingRnti = 0;
    pdcch->dci.cceIndex = 4; /* considering SIB1 is sent at cce 0-1-2-3 */
@@ -589,11 +624,12 @@ uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc
    pdcch->dci.beamPdcchInfo.prg[0].beamIdx[0] = 0;
    pdcch->dci.txPdcchPower.powerValue = 0;
    pdcch->dci.txPdcchPower.powerControlOffsetSS = 0;
+   pdcch->dci.pdschCfg = pdsch;
 
    /* fill the PDSCH PDU */
    uint8_t cwCount = 0;
    pdsch->pduBitmap = 0; /* PTRS and CBG params are excluded */
-   pdsch->rnti = cell->schDlSlotInfo[slotTime.slot]->dlMsgInfo->crnti;
+   pdsch->rnti = cell->raCb[ueId-1].tcrnti;
    pdsch->pduIndex = 0;
    pdsch->numCodewords = 1;
    for(cwCount = 0; cwCount < pdsch->numCodewords; cwCount++)
@@ -620,12 +656,12 @@ uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc
    pdsch->dmrs.nrOfDmrsSymbols  = NUM_DMRS_SYMBOLS;
    pdsch->dmrs.dmrsAddPos       = DMRS_ADDITIONAL_POS;
 
-   pdsch->pdschTimeAlloc.timeAlloc.startSymb = 3; /* spec-38.214, Table 5.1.2.1-1 */
-   pdsch->pdschTimeAlloc.timeAlloc.numSymb = NUM_PDSCH_SYMBOL;
+   pdsch->pdschTimeAlloc.timeAlloc.startSymb = pdschStartSymbol; 
+   pdsch->pdschTimeAlloc.timeAlloc.numSymb = pdschNumSymbols;
 
    pdsch->pdschFreqAlloc.resourceAllocType = 1; /* RAT type-1 RIV format */
    pdsch->pdschFreqAlloc.freqAlloc.startPrb = MAX_NUM_RB;
-   pdsch->pdschFreqAlloc.freqAlloc.numPrb = schCalcNumPrb(tbSize, mcs, NUM_PDSCH_SYMBOL);
+   pdsch->pdschFreqAlloc.freqAlloc.numPrb = schCalcNumPrb(tbSize, mcs, pdschNumSymbols);
    pdsch->pdschFreqAlloc.vrbPrbMapping = 0; /* non-interleaved */
 
    /* Find total symbols occupied including DMRS */
@@ -645,7 +681,7 @@ uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc
    }
 
    /* Allocate the number of PRBs required for RAR PDSCH */
-   if((allocatePrbDl(cell, slotTime, startSymbol, numSymbol,\
+   if((allocatePrbDl(cell, msg4Time, startSymbol, numSymbol,\
       &pdsch->pdschFreqAlloc.freqAlloc.startPrb, pdsch->pdschFreqAlloc.freqAlloc.numPrb)) != ROK)
    {
       DU_LOG("\nERROR  --> SCH : Resource allocation failed for MSG4");
@@ -660,34 +696,33 @@ uint8_t schDlRsrcAllocMsg4(SchCellCb *cell, SlotTimingInfo slotTime, DlMsgAlloc
    pdsch->txPdschPower.powerControlOffset = 0;
    pdsch->txPdschPower.powerControlOffsetSS = 0;
 
-   pdcch->dci.pdschCfg = pdsch;
-
+   msg4Alloc->dlMsgInfo.isMsg4Pdu = true;
    return ROK;
 }
  
-uint16_t schAllocPucchResource(SchCellCb *cell, uint16_t crnti, uint16_t slot)
+/*******************************************************************
+ *
+ * @brief Scheduling for Pucch Resource
+ *
+ * @details
+ *
+ *    Function : schAllocPucchResource
+ *
+ *    Functionality:
+ *       Scheduling for Pucch Resource
+ *
+ * @params[in] SchCellCb *cell, SlotTimingInfo pucchTime, crnti
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ *******************************************************************/
+
+uint16_t schAllocPucchResource(SchCellCb *cell, SlotTimingInfo pucchTime, uint16_t crnti)
 {
-   uint8_t k1 = SCH_DEFAULT_K1, ueIdx = 0, dlToUlAckIdx;
    uint16_t pucchSlot = 0;
    SchUlSlotInfo  *schUlSlotInfo = NULLP;
-   SchPucchCfg    *schPucchCfg = NULLP;
-
-   GET_UE_IDX(crnti, ueIdx);
-   if(cell->ueCb[ueIdx].ueCfg.spCellCfg.servCellCfg.initUlBwp.pucchCfgPres)
-   {
-      schPucchCfg = &(cell->ueCb[ueIdx].ueCfg.spCellCfg.servCellCfg.initUlBwp.pucchCfg);
-      if(schPucchCfg->dlDataToUlAck)
-      {
-         for(dlToUlAckIdx = 0; dlToUlAckIdx < schPucchCfg->dlDataToUlAck->dlDataToUlAckListCount; dlToUlAckIdx++)
-         {
-            //For now considering only the first value in the list
-            k1 = schPucchCfg->dlDataToUlAck->dlDataToUlAckList[dlToUlAckIdx];
-            break;
-         }
-      }
-   }
    
-   pucchSlot = (slot + k1)  % cell->numSlots;
+   pucchSlot = pucchTime.slot;
    schUlSlotInfo = cell->schUlSlotInfo[pucchSlot];
    memset(&schUlSlotInfo->schPucchInfo, 0, sizeof(SchPucchInfo));
 
@@ -714,10 +749,9 @@ uint16_t schAllocPucchResource(SchCellCb *cell, uint16_t crnti, uint16_t slot)
  *
  * ****************************************************************/
 uint8_t schDlRsrcAllocDlMsg(SchCellCb *cell, SlotTimingInfo slotTime, uint16_t crnti,
-      uint32_t *accumalatedSize, DlMsgAlloc *dlMsgAlloc)
+                uint32_t tbSize, DlMsgAlloc *dlMsgAlloc, uint16_t startPRB, uint8_t pdschStartSymbol, uint8_t pdschNumSymbols)
 {
-   uint8_t ueIdx;
-   uint16_t tbSize = 0;
+   uint8_t ueId=0;
    PdcchCfg *pdcch = NULLP;
    PdschCfg *pdsch = NULLP;
    BwpCfg *bwp = NULLP;
@@ -726,12 +760,12 @@ uint8_t schDlRsrcAllocDlMsg(SchCellCb *cell, SlotTimingInfo slotTime, uint16_t c
    SchPdschConfig pdschCfg;
    uint8_t dmrsStartSymbol, startSymbol, numSymbol;
 
-   pdcch = &dlMsgAlloc->dlMsgPdcchCfg;
-   pdsch = &dlMsgAlloc->dlMsgPdschCfg;
-   bwp = &dlMsgAlloc->bwp;
+   pdcch = &dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo].dlMsgPdcchCfg;
+   pdsch = &dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo].dlMsgPdschCfg;
+   bwp = &dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo].bwp;
 
-   GET_UE_IDX(crnti, ueIdx);
-   ueCb  = cell->ueCb[ueIdx-1];
+   GET_UE_ID(crnti, ueId);
+   ueCb  = cell->ueCb[ueId-1];
    coreset1 = ueCb.ueCfg.spCellCfg.servCellCfg.initDlBwp.pdcchCfg.cRSetToAddModList[0];
    pdschCfg = ueCb.ueCfg.spCellCfg.servCellCfg.initDlBwp.pdschCfg;
 
@@ -781,9 +815,8 @@ uint8_t schDlRsrcAllocDlMsg(SchCellCb *cell, SlotTimingInfo slotTime, uint16_t c
       pdsch->codeword[cwCount].mcsIndex = ueCb.ueCfg.dlModInfo.mcsIndex;
       pdsch->codeword[cwCount].mcsTable = ueCb.ueCfg.dlModInfo.mcsTable;
       pdsch->codeword[cwCount].rvIndex = 0;
-      tbSize = schCalcTbSize(*accumalatedSize + TX_PAYLOAD_HDR_LEN);
-      if(tbSize < *accumalatedSize)
-         *accumalatedSize = tbSize - TX_PAYLOAD_HDR_LEN;
+
+      tbSize +=TX_PAYLOAD_HDR_LEN;
       pdsch->codeword[cwCount].tbSize = tbSize;
    }
    pdsch->dataScramblingId = cell->cellCfg.phyCellId;
@@ -800,14 +833,13 @@ uint8_t schDlRsrcAllocDlMsg(SchCellCb *cell, SlotTimingInfo slotTime, uint16_t c
    pdsch->dmrs.nrOfDmrsSymbols  = NUM_DMRS_SYMBOLS;
    pdsch->dmrs.dmrsAddPos       = pdschCfg.dmrsDlCfgForPdschMapTypeA.addPos;
 
-   pdsch->pdschTimeAlloc.timeAlloc.startSymb = pdschCfg.timeDomRsrcAllociList[0].startSymbol;
-   pdsch->pdschTimeAlloc.timeAlloc.numSymb = pdschCfg.timeDomRsrcAllociList[0].symbolLength;
+   pdsch->pdschTimeAlloc.timeAlloc.startSymb = pdschStartSymbol; 
+   pdsch->pdschTimeAlloc.timeAlloc.numSymb = pdschNumSymbols;
 
    pdsch->pdschFreqAlloc.vrbPrbMapping = 0; /* non-interleaved */
    pdsch->pdschFreqAlloc.resourceAllocType = 1; /* RAT type-1 RIV format */
-   pdsch->pdschFreqAlloc.freqAlloc.startPrb = MAX_NUM_RB;
-   pdsch->pdschFreqAlloc.freqAlloc.numPrb = schCalcNumPrb(tbSize, ueCb.ueCfg.dlModInfo.mcsIndex, \
-                  pdschCfg.timeDomRsrcAllociList[0].symbolLength);
+   pdsch->pdschFreqAlloc.freqAlloc.startPrb = startPRB; /*Start PRB will be already known*/
+   pdsch->pdschFreqAlloc.freqAlloc.numPrb = schCalcNumPrb(tbSize, ueCb.ueCfg.dlModInfo.mcsIndex, pdschNumSymbols);
 
    /* Find total symbols occupied including DMRS */
    dmrsStartSymbol = findDmrsStartSymbol(pdsch->dmrs.dlDmrsSymbPos);
@@ -1330,6 +1362,743 @@ SchK2TimingInfoTbl *msg3K2InfoTbl, SchK2TimingInfoTbl *k2InfoTbl)
    }
 }
 
+/*******************************************************************************************
+ *
+ * @brief Allocate the PRB using RRM policy
+ *
+ * @details
+ *
+ *    Function : prbAllocUsingRRMPolicy
+ *
+ *    Functionality:
+ *      [Step1]: Traverse each Node in the LC list
+ *      [Step2]: Check whether the LC has ZERO requirement then clean this LC
+ *      [Step3]: Calcualte the maxPRB for this LC.
+ *              a. For Dedicated LC, maxPRB = sum of remainingReservedPRB and
+ *              sharedPRB
+ *              b. For Default, just SharedPRB count
+ *      [Step4]: If the LC is the First one to be allocated for this UE then add
+ *      TX_PAYLODN_LEN to reqBO 
+ *      [Step5]: Calculate the estimate PRB and estimate BO to be allocated
+ *               based on reqBO and maxPRB left.
+ *      [Step6]: Based on calculated PRB, Update Reserved PRB and Shared PRB counts
+ *      [Step7]: Deduce the reqBO based on allocBO and move the LC node to last.
+ *      [Step8]: Continue the next loop from List->head
+ *
+ *      [Loop Exit]:
+ *        [Exit1]: If all the LCs are allocated in list
+ *        [Exit2]: If PRBs are exhausted
+ *
+ * @params[in] I/P > lcLinkList pointer (LcInfo list)
+ *             I/P > IsDedicatedPRB (Flag to indicate that RESERVED PRB to use 
+ *             I/P > mcsIdx and PDSCH symbols count 
+ *             I/P & O/P > Shared PRB , reserved PRB Count
+ *             I/P & O/P > Total TBS size accumulated
+ *             I/P & O/P > isTxPayloadLenAdded[For DL] : Decision flag to add the TX_PAYLOAD_HDR_LEN
+ *             I/P & O/P > srRcvd Flag[For UL] : Decision flag to add UL_GRANT_SIZE
+ *
+ * @return void
+ *
+ * *******************************************************************************************/
+void prbAllocUsingRRMPolicy(CmLListCp *lcLL, bool isDedicatedPRB, uint16_t mcsIdx,uint8_t numSymbols,\
+                  uint16_t *sharedPRB, uint16_t *reservedPRB, bool *isTxPayloadLenAdded, bool *srRcvd)
+{
+   CmLList *node = NULLP;
+   LcInfo *lcNode = NULLP;
+   uint16_t remReservedPRB = 0, estPrb = 0, maxPRB = 0;
+
+   if(lcLL == NULLP)
+   {
+      DU_LOG("\nERROR --> SCH: LcList not present");
+      return;
+   }
+   node = lcLL->first;
+
+   /*Only for Dedicated LcList, Valid value will be assigned to remReservedPRB
+    * For Other LcList, remReservedPRB = 0*/
+   if(reservedPRB != NULLP && isDedicatedPRB == TRUE)
+   {
+      remReservedPRB = *reservedPRB;
+   }
+
+   /*[Step1]*/
+   while(node)
+   {
+#if 0
+      /*For Debugging purpose*/
+      printLcLL(lcLL);
+#endif
+      lcNode = (LcInfo *)node->node;
+
+      /* [Step2]: Below condition will hit in rare case as it has been taken care during the cleaning 
+       * process of LCID which was fully allocated. Check is just for safety purpose*/
+      if(lcNode->reqBO == 0 && lcNode->allocBO == 0)
+      {
+         DU_LOG("\nERROR --> SCH: LCID:%d has no requirement, clearing this node",\
+               lcNode->lcId);
+         deleteNodeFromLList(lcLL, node);
+         SCH_FREE(lcNode, sizeof(LcInfo));
+         node = lcLL->first; 
+         continue;
+      }
+
+      /*[Exit1]: All LCs are allocated(allocBO = 0 for fully unallocated LC)*/
+      if(lcNode->allocBO != 0)
+      {
+         DU_LOG("\nDEBUG -->  SCH: All LC are allocated [SharedPRB:%d]",*sharedPRB);
+         return;
+      }
+
+      /*[Exit2]: If PRBs are exhausted*/
+      if(isDedicatedPRB)
+      {
+         /*Loop Exit: All resources exhausted*/
+         if(remReservedPRB == 0 && *sharedPRB == 0)
+         {
+            DU_LOG("\nDEBUG  -->  SCH: Dedicated resources exhausted for LC:%d",lcNode->lcId);
+            return;
+         }
+      }
+      else
+      {
+         /*Loop Exit: All resources exhausted*/
+         if(*sharedPRB == 0)
+         {
+            DU_LOG("\nDEBUG  --> SCH: Default resources exhausted for LC:%d",lcNode->lcId);
+            return;
+         }
+      }
+
+      /*[Step3]*/
+      maxPRB = remReservedPRB + *sharedPRB;
+
+      /*[Step4]*/
+      if((isTxPayloadLenAdded != NULLP) && (*isTxPayloadLenAdded == FALSE))
+      {
+         DU_LOG("\nDEBUG  --> SCH: LC:%d is the First node to be allocated which includes TX_PAYLOAD_HDR_LEN",\
+               lcNode->lcId);
+         *isTxPayloadLenAdded = TRUE;
+         lcNode->allocBO = calculateEstimateTBSize((lcNode->reqBO + TX_PAYLOAD_HDR_LEN),\
+               mcsIdx, numSymbols, maxPRB, &estPrb);
+         lcNode->allocBO -=TX_PAYLOAD_HDR_LEN;
+      }
+      else if((srRcvd != NULLP) && (*srRcvd == TRUE))
+      {
+         DU_LOG("\nDEBUG  --> SCH: LC:%d is the First node to be allocated which includes UL_GRANT_SIZE",\
+               lcNode->lcId);
+         *srRcvd = FALSE;
+         lcNode->reqBO += UL_GRANT_SIZE;
+         lcNode->allocBO = calculateEstimateTBSize(lcNode->reqBO, mcsIdx, numSymbols, maxPRB, &estPrb);
+      }
+      else
+      {
+         /*[Step4]*/
+         lcNode->allocBO = calculateEstimateTBSize(lcNode->reqBO,\
+               mcsIdx, numSymbols, maxPRB, &estPrb);
+      }
+
+      /*[Step6]:Re-adjust the reservedPRB pool count and *SharedPRB Count based on
+       * estimated PRB allocated*/
+      if((isDedicatedPRB == TRUE) && (estPrb <= remReservedPRB))
+      {
+         remReservedPRB = remReservedPRB - estPrb;
+      }
+      else   /*LC requirement need PRB share from SharedPRB*/
+      {
+         if(*sharedPRB <=  (estPrb - remReservedPRB))
+         {
+            DU_LOG("\nDEBUG  --> SCH: SharedPRB is less");
+            *sharedPRB = 0;
+         }
+         else
+         {
+            *sharedPRB = *sharedPRB - (estPrb - remReservedPRB);
+         }
+         remReservedPRB = 0;
+      }
+
+      /*[Step7]*/
+      lcNode->reqBO -= lcNode->allocBO;  /*Update the reqBO with remaining bytes unallocated*/
+      lcNode->allocPRB = estPrb;
+      cmLListAdd2Tail(lcLL, cmLListDelFrm(lcLL, node));
+
+      /*[Step8]:Next loop: First LC to be picked from the list
+       * because Allocated Nodes are moved to the last*/
+      node = lcLL->first; 
+
+   }
+   return;
+}
+
+/*******************************************************************************************
+ *
+ * @brief Check the LC List and fill the LC and GrantSize to be sent to MAC as
+ * BO Report
+ *
+ * @details
+ *
+ *    Function : updateGrantSizeForBoRpt
+ *
+ *    Functionality:
+ *             Check the LC List and fill the LC and GrantSize to be sent to MAC as
+ *             BO Report in dlMsgAlloc Pointer
+ *
+ * @params[in] I/P > lcLinkList pointer (LcInfo list)
+ *             I/P & O/P > dlMsgAlloc[for DL](Pending LC to be added in this context) 
+ *             I/P & O/P > BsrInfo (applicable for UL)
+ *             I/P & O/P > accumalatedBOSize
+ * @return void
+ *
+ * *******************************************************************************************/
+void updateGrantSizeForBoRpt(CmLListCp *lcLL, DlMsgAlloc *dlMsgAlloc,\
+                                BsrInfo *bsrInfo, uint32_t *accumalatedBOSize)
+{
+   CmLList *node = NULLP, *next = NULLP;
+   LcInfo *lcNode = NULLP;
+   DlMsgSchInfo *dlMsgSchInfo = NULLP;
+
+   if(lcLL == NULLP)
+   {
+      DU_LOG("\nERROR --> SCH: LcList not present");
+      return;
+   }
+
+   if(lcLL->count)
+   {
+      node = lcLL->first;
+   }
+   else
+   {
+      /*lcLL is empty*/
+      return;
+   }
+
+   /*Traverse List*/
+   while(node)
+   {
+      next = node->next;
+      lcNode = (LcInfo *)node->node;
+      if(lcNode != NULLP)
+      {
+         DU_LOG("\nINFO   --> SCH : LcID:%d, [reqBO, allocBO, allocPRB]:[%d,%d,%d]",\
+               lcNode->lcId, lcNode->reqBO, lcNode->allocBO, lcNode->allocPRB);
+         if(dlMsgAlloc != NULLP)
+         {
+            dlMsgSchInfo = &dlMsgAlloc->dlMsgSchedInfo[dlMsgAlloc->numSchedInfo];
+
+            /*Add this LC to dlMsgAlloc so that if this LC gets allocated, BO
+             * report for allocation can be sent to MAC*/
+            dlMsgSchInfo->lcSchInfo[dlMsgSchInfo->numLc].lcId = lcNode->lcId;
+            dlMsgSchInfo->lcSchInfo[dlMsgSchInfo->numLc].schBytes = lcNode->allocBO;
+
+            /*Calculate the Total Payload/BO size allocated*/
+            *accumalatedBOSize += dlMsgSchInfo->lcSchInfo[dlMsgSchInfo->numLc].schBytes; 
+
+            DU_LOG("\nINFO   --> SCH: Added in MAC BO report: LCID:%d,reqBO:%d,Idx:%d, TotalBO Size:%d",\
+                  lcNode->lcId,lcNode->reqBO, dlMsgSchInfo->numLc, *accumalatedBOSize);
+
+            dlMsgSchInfo->numLc++;
+            /*The LC has been fully allocated, clean it*/
+            if(lcNode->reqBO == 0)
+            {
+               handleLcLList(lcLL, lcNode->lcId, DELETE);
+            }
+         }
+         else if(bsrInfo != NULLP)
+         {
+            *accumalatedBOSize += lcNode->allocBO;   
+            DU_LOG("\nINFO   --> SCH: UL : LCID:%d,reqBO:%d, TotalBO Size:%d",\
+                  lcNode->lcId,lcNode->reqBO, *accumalatedBOSize);
+         }
+      }
+      node = next;
+   }/*End of while*/
+   return;
+}
+
+/*******************************************************************
+*
+* @brief fill DL message information for MSG4 and Dedicated DL Msg
+*
+* @details
+*
+*    Function : fillDlMsgInfo
+*
+*    Functionality:
+*       fill DL message information for MSG4 and Dedicated DL Msg
+*
+* @params[in] DlMsgInfo *dlMsgInfo,  uint8_t crnti
+* @return void
+*
+*******************************************************************/
+void fillDlMsgInfo(DlMsgInfo *dlMsgInfo, uint8_t crnti)
+{
+   dlMsgInfo->crnti = crnti;
+   dlMsgInfo->ndi = 1;
+   dlMsgInfo->harqProcNum = 0;
+   dlMsgInfo->dlAssignIdx = 0;
+   dlMsgInfo->pucchTpc = 0;
+   dlMsgInfo->pucchResInd = 0;
+   dlMsgInfo->harqFeedbackInd = 0;
+   dlMsgInfo->dciFormatId = 1;
+}
+
+/*******************************************************************
+ *
+ * @brief sch Process pending Msg4 Req
+ *
+ * @details
+ *
+ *    Function : schProcessMsg4Req
+ *
+ *    Functionality:
+ *       sch Process pending Msg4 Req
+ *
+ * @params[in] SchCellCb *cell,  SlotTimingInfo currTime 
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ *******************************************************************/
+
+bool schProcessMsg4Req(SchCellCb *cell, SlotTimingInfo currTime, uint8_t ueId)
+{
+   uint8_t pdschStartSymbol = 0, pdschNumSymbols = 0;
+   SlotTimingInfo pdcchTime, pdschTime, pucchTime;
+   DlMsgAlloc *dciSlotAlloc = NULLP;    /* Stores info for transmission of PDCCH for Msg4 */
+   DlMsgAlloc  *msg4SlotAlloc = NULLP;   /* Stores info for transmission of PDSCH for Msg4 */
+
+   if(cell == NULL)
+   {
+      DU_LOG("\nERROR  -->  SCH: schDlRsrcAllocMsg4() : Cell is NULL");
+      return false;
+   }
+   
+   if(findValidK0K1Value(cell, currTime, ueId, false, &pdschStartSymbol, &pdschNumSymbols, &pdcchTime, &pdschTime,\
+            &pucchTime) != true )
+   {
+      return false;
+   }
+
+   if(cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId-1] == NULL)
+   {
+      SCH_ALLOC(dciSlotAlloc, sizeof(DlMsgAlloc));
+      if(dciSlotAlloc == NULLP)
+      {
+         DU_LOG("\nERROR  -->  SCH : Memory Allocation failed for dciSlotAlloc");
+         return false;
+      }
+      cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId-1] = dciSlotAlloc;
+      memset(dciSlotAlloc, 0, sizeof(DlMsgAlloc));
+      GET_CRNTI(dciSlotAlloc->crnti, ueId);
+   }
+   else
+      dciSlotAlloc = cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId-1];
+
+   /* Fill PDCCH and PDSCH scheduling information for Msg4 */
+   if((schDlRsrcAllocMsg4(cell, pdschTime, ueId, dciSlotAlloc, pdschStartSymbol, pdschNumSymbols)) != ROK)
+   {
+      DU_LOG("\nERROR  -->  SCH: Scheduling of Msg4 failed in slot [%d]", pdschTime.slot);
+      if(dciSlotAlloc->numSchedInfo == 0)
+      {
+         SCH_FREE(dciSlotAlloc, sizeof(DlMsgAlloc));
+         cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId-1] = NULLP;
+      }
+      else
+         memset(&dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], 0, sizeof(DlMsgSchInfo));
+      return false;
+   }
+
+   /* Check if both DCI and RAR are sent in the same slot.
+    * If not, allocate memory RAR PDSCH slot to store RAR info
+    */
+   if(pdcchTime.slot == pdschTime.slot)
+   {
+      dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].pduPres = BOTH;
+      dciSlotAlloc->numSchedInfo++;
+   }
+   else
+   {
+      /* Allocate memory to schedule rarSlot to send RAR, pointer will be checked at schProcessSlotInd() */
+      if(cell->schDlSlotInfo[pdschTime.slot]->dlMsgAlloc[ueId-1] == NULL)
+      {
+         SCH_ALLOC(msg4SlotAlloc, sizeof(DlMsgAlloc));
+         if(msg4SlotAlloc == NULLP)
+         {
+            DU_LOG("\nERROR  -->  SCH : Memory Allocation failed for msg4SlotAlloc");
+            if(dciSlotAlloc->numSchedInfo == 0)
+            {
+               SCH_FREE(dciSlotAlloc, sizeof(DlMsgAlloc));
+               cell->schDlSlotInfo[pdcchTime.slot]->dlMsgAlloc[ueId-1] = NULLP;
+            }
+            else
+               memset(&dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], 0, sizeof(DlMsgSchInfo));
+            return false;
+         }
+         cell->schDlSlotInfo[pdschTime.slot]->dlMsgAlloc[ueId-1] = msg4SlotAlloc;
+         memset(msg4SlotAlloc, 0, sizeof(DlMsgAlloc));
+         msg4SlotAlloc->crnti = dciSlotAlloc->crnti;
+      }
+      else
+         msg4SlotAlloc = cell->schDlSlotInfo[pdschTime.slot]->dlMsgAlloc[ueId-1];
+
+      /* Copy all RAR info */
+      memcpy(&msg4SlotAlloc->dlMsgSchedInfo[msg4SlotAlloc->numSchedInfo], \
+         &dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo], sizeof(DlMsgSchInfo));
+      msg4SlotAlloc->dlMsgSchedInfo[msg4SlotAlloc->numSchedInfo].dlMsgPdcchCfg.dci.pdschCfg = \
+         &msg4SlotAlloc->dlMsgSchedInfo[msg4SlotAlloc->numSchedInfo].dlMsgPdschCfg;
+
+      /* Assign correct PDU types in corresponding slots */
+      msg4SlotAlloc->dlMsgSchedInfo[msg4SlotAlloc->numSchedInfo].pduPres = PDSCH_PDU;
+      dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].pduPres = PDCCH_PDU;
+      dciSlotAlloc->dlMsgSchedInfo[dciSlotAlloc->numSchedInfo].pdschSlot = pdschTime.slot;
+
+      dciSlotAlloc->numSchedInfo++;
+      msg4SlotAlloc->numSchedInfo++;
+   }
+
+   /* PUCCH resource */
+   schAllocPucchResource(cell, pucchTime, cell->raCb[ueId-1].tcrnti);
+
+   cell->schDlSlotInfo[pdcchTime.slot]->pdcchUe = ueId;
+   cell->schDlSlotInfo[pdschTime.slot]->pdschUe = ueId;
+   cell->schUlSlotInfo[pucchTime.slot]->pucchUe = ueId;
+   cell->raCb[ueId-1].msg4recvd = FALSE;
+   return true;
+}
+
+/*******************************************************************
+ *
+ * @brief  Handler to calculate TBS size for BSR requested
+ *
+ * @details
+ *
+ *    Function :  schCalculateUlTbs
+ *
+ *    Functionality: Function will note the required TBS for each LCGIDX and use
+ *    the Priority LCG List and RRM policy to allocate the TBS size
+ *
+ * @params [in] ueCb (Pointer to UE CB)
+ *         [in] puschTime (Time slot where PUSCH will be sent)
+ *         [in] symbLen (No of Symbols used for PUSCH transmission)
+ *         [out] startPrb(Pointer to startPRB which will be calculated while
+ *         finding the best Free Block)
+ *         [out] totTBS(Pointer to total TBS size)
+ *
+ * @return bool : true > Scheduling of UL grant is successful
+ *                false > vice versa
+ *
+ * ****************************************************************/
+bool schCalculateUlTbs(SchUeCb *ueCb, SlotTimingInfo puschTime, uint8_t symbLen,\
+                          uint16_t *startPrb, uint32_t *totTBS)
+{
+   uint16_t mcsIdx = 0;
+   CmLListCp *lcLL = NULLP;
+   uint16_t lcgIdx = 0, lcId =0, maxFreePRB = 0;
+
+   *startPrb = 0;
+   *totTBS = 0;
+
+   /* check for BSR */
+   for(lcgIdx=0; lcgIdx<MAX_NUM_LOGICAL_CHANNEL_GROUPS; lcgIdx++)
+   {
+      if(ueCb->bsrInfo[lcgIdx].dataVol == 0)
+      {
+         continue;
+      }
+
+      /*TODO: lcgIdx and LCID has been implemented as one to one mapping.
+       * Need to check the mapping to figure out the LCID and lcgIdx once L2
+       * spec specifies any logic*/
+      lcId = lcgIdx;
+      if(ueCb->ulInfo.ulLcCtxt[lcId].isDedicated)
+      {
+         lcLL = &(ueCb->ulLcPrbEst.dedLcInfo->dedLcList);
+      }
+      else
+      {
+         lcLL = &(ueCb->ulLcPrbEst.defLcList);
+      }
+
+      /*[Step2]: Update the reqPRB and Payloadsize for this LC in the appropriate List*/
+      if(updateLcListReqPRB(lcLL, lcId, ueCb->bsrInfo[lcgIdx].dataVol) != ROK)
+      {
+         DU_LOG("\nERROR  --> SCH: LcgId:%d updation failed",lcId);
+         return false; 
+      }
+   }
+
+   if ((ueCb->ulLcPrbEst.defLcList.count == 0) && \
+         ((ueCb->ulLcPrbEst.dedLcInfo == NULL) || (ueCb->ulLcPrbEst.dedLcInfo->dedLcList.count == 0)))
+   {
+      if(ueCb->srRcvd)
+      {
+         *startPrb = MAX_NUM_RB;
+         *totTBS = schCalcTbSize(UL_GRANT_SIZE);
+      }
+
+      /*Returning true when NO Grant is there for UE as this is not scheduling
+       * error*/
+      return (true);
+   }
+
+   maxFreePRB = searchLargestFreeBlock(ueCb->cellCb, puschTime, startPrb, DIR_UL);
+
+   /*[Step4]: Estimation of PRB and BO which can be allocated to each LC in
+    * the list based on RRM policy*/
+
+   /*Either this UE contains no reservedPRB pool fir dedicated S-NSSAI or 
+    * Num of Free PRB available is not enough to reserve Dedicated PRBs*/
+   if(maxFreePRB != 0)
+   {
+      mcsIdx = ueCb->ueCfg.ulModInfo.mcsIndex;
+      if((ueCb->ulLcPrbEst.dedLcInfo == NULLP) 
+            || ((maxFreePRB <  ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB)))
+      { 
+         ueCb->ulLcPrbEst.sharedNumPrb = maxFreePRB;
+         DU_LOG("\nDEBUG  -->  SCH : UL Only Default Slice is scheduled, sharedPRB Count:%d",\
+               ueCb->ulLcPrbEst.sharedNumPrb);
+
+         /*PRB Alloc for Default LCs*/
+         prbAllocUsingRRMPolicy(&(ueCb->ulLcPrbEst.defLcList), FALSE, mcsIdx, symbLen,\
+               &(ueCb->ulLcPrbEst.sharedNumPrb), NULLP, NULLP,&(ueCb->srRcvd));
+      }
+      else
+      {
+         ueCb->ulLcPrbEst.sharedNumPrb = maxFreePRB - ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB;
+
+         /*PRB Alloc for Dedicated LCs*/
+         prbAllocUsingRRMPolicy(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), TRUE, mcsIdx, symbLen,\
+               &(ueCb->ulLcPrbEst.sharedNumPrb), &(ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB),\
+               NULLP,&(ueCb->srRcvd));
+
+         /*PRB Alloc for Default LCs*/
+         prbAllocUsingRRMPolicy(&(ueCb->ulLcPrbEst.defLcList), FALSE, mcsIdx, symbLen, \
+               &(ueCb->ulLcPrbEst.sharedNumPrb), &(ueCb->ulLcPrbEst.dedLcInfo->rsvdDedicatedPRB),\
+               NULLP,&(ueCb->srRcvd));
+      }
+   }
+   /*[Step5]:Traverse each LCID in LcList to calculate the exact Scheduled Bytes
+    * using allocated BO per LC and Update dlMsgAlloc(BO report for MAC*/ 
+   if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+      updateGrantSizeForBoRpt(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), NULLP, ueCb->bsrInfo, totTBS);
+
+   updateGrantSizeForBoRpt(&(ueCb->ulLcPrbEst.defLcList), NULLP, ueCb->bsrInfo, totTBS);
+
+   /*Below case will hit if NO LC(s) are allocated due to resource crunch*/
+   if (*totTBS == 0)
+   {
+      if(maxFreePRB == 0)
+      {
+         DU_LOG("\nERROR  --> SCH : NO FREE PRB!!");
+      }
+      else
+      {
+         /*Schedule the LC for next slot*/
+         DU_LOG("\nDEBUG  -->  SCH : No LC has been scheduled");
+      }
+      return (false);
+   }
+   return (true);
+}
+
+/*******************************************************************
+ *
+ * @brief sch Process pending Sr or Bsr Req
+ *
+ * @details
+ *
+ *    Function : schProcessSrOrBsrReq
+ *
+ *    Functionality:
+ *       sch Process pending Sr or Bsr Req
+ *
+ * @params[in] SchCellCb *cell,  SlotTimingInfo currTime 
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ *******************************************************************/
+bool schProcessSrOrBsrReq(SchCellCb *cell, SlotTimingInfo currTime, uint8_t ueId)
+{
+   bool k2Found = FALSE, ret = FALSE;
+   uint8_t startSymb = 0, symbLen = 0;
+   uint8_t k2TblIdx = 0, k2Index = 0, k2Val = 0;
+   uint16_t startPrb = 0;
+   uint32_t totDataReq = 0; /* in bytes */
+   SchUeCb *ueCb;
+   SchPuschInfo *puschInfo;
+   DciInfo  *dciInfo = NULLP;
+   SchK2TimingInfoTbl *k2InfoTbl=NULLP;
+   SlotTimingInfo dciTime, puschTime;
+
+   if(cell == NULLP)
+   {
+      DU_LOG("\nERROR  -->  SCH: schDlRsrcAllocMsg4() : Cell is NULL");
+      return false;
+   }
+
+   ueCb = &cell->ueCb[ueId-1];
+
+   if(ueCb == NULLP)
+   {
+      DU_LOG("\nERROR  -->  SCH: schDlRsrcAllocMsg4() : UE is NULL");
+      return false;
+   }
+   /* Calculating time frame to send DCI for SR */
+   ADD_DELTA_TO_TIME(currTime, dciTime, PHY_DELTA_DL + SCHED_DELTA);
+#ifdef NR_TDD
+   if(schGetSlotSymbFrmt(dciTime.slot, cell->slotFrmtBitMap) == DL_SLOT)
+#endif
+   {     
+      if(ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.k2TblPrsnt)
+         k2InfoTbl = &ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.k2InfoTbl;
+      else
+         k2InfoTbl =  &cell->cellCfg.schInitialUlBwp.k2InfoTbl;
+
+      for(k2TblIdx = 0; k2TblIdx < k2InfoTbl->k2TimingInfo[dciTime.slot].numK2; k2TblIdx++)
+      {
+         k2Index = k2InfoTbl->k2TimingInfo[dciTime.slot].k2Indexes[k2TblIdx];
+
+         if(!ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.k2TblPrsnt)
+         {
+            k2Val = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].k2;
+            startSymb = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].startSymbol;
+            symbLen = cell->cellCfg.schInitialUlBwp.puschCommon.timeDomRsrcAllocList[k2Index].symbolLength;
+         }
+         else
+         {
+            k2Val = ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.puschCfg.timeDomRsrcAllocList[k2Index].k2;
+            startSymb =  ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.puschCfg.timeDomRsrcAllocList[k2Index].startSymbol;
+            symbLen =  ueCb->ueCfg.spCellCfg.servCellCfg.initUlBwp.puschCfg.timeDomRsrcAllocList[k2Index].symbolLength;
+         }
+
+         /* Calculating time frame to send PUSCH for SR */
+         ADD_DELTA_TO_TIME(dciTime, puschTime, k2Val);
+#ifdef NR_TDD
+         if(schGetSlotSymbFrmt(puschTime.slot, cell->slotFrmtBitMap) == DL_SLOT)
+            continue;
+#endif
+         if(cell->schUlSlotInfo[puschTime.slot]->puschUe != 0)
+         {
+            continue;
+         }
+         k2Found = true;
+         break;
+      }
+   }
+
+   if(k2Found == true)
+   {
+      ret = schCalculateUlTbs(ueCb, puschTime, symbLen, &startPrb, &totDataReq);
+      if(totDataReq > 0 && ret == TRUE)
+      {
+         SCH_ALLOC(dciInfo, sizeof(DciInfo));
+         if(!dciInfo)
+         {
+            DU_LOG("\nERROR  -->  SCH : Memory Allocation failed for dciInfo alloc");
+
+            if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+               updateBsrAndLcList(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), ueCb->bsrInfo, RFAILED);
+
+            updateBsrAndLcList(&(ueCb->ulLcPrbEst.defLcList), ueCb->bsrInfo, RFAILED);
+            return false;
+         }
+         cell->schDlSlotInfo[dciTime.slot]->ulGrant = dciInfo;
+         memset(dciInfo,0,sizeof(DciInfo));
+
+         /* Update PUSCH allocation */
+         if(schFillPuschAlloc(ueCb, puschTime, totDataReq, startSymb, symbLen, startPrb) == ROK)
+         {
+            if(cell->schUlSlotInfo[puschTime.slot]->schPuschInfo)
+            {
+               puschInfo = cell->schUlSlotInfo[puschTime.slot]->schPuschInfo;
+               if(puschInfo != NULLP)
+               {
+                  /* Fill DCI for UL grant */
+                  schFillUlDci(ueCb, puschInfo, dciInfo);
+                  memcpy(&dciInfo->slotIndInfo, &dciTime, sizeof(SlotTimingInfo));
+                  ueCb->srRcvd = false;
+                  ueCb->bsrRcvd = false;
+                  cell->schUlSlotInfo[puschTime.slot]->puschUe = ueId;
+                  if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+                     updateBsrAndLcList(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), ueCb->bsrInfo, ROK);
+
+                  updateBsrAndLcList(&(ueCb->ulLcPrbEst.defLcList), ueCb->bsrInfo, ROK);
+                  return true;
+               }
+            }
+         }
+
+         if(ueCb->ulLcPrbEst.dedLcInfo != NULLP)
+            updateBsrAndLcList(&(ueCb->ulLcPrbEst.dedLcInfo->dedLcList), ueCb->bsrInfo, RFAILED);
+
+         updateBsrAndLcList(&(ueCb->ulLcPrbEst.defLcList), ueCb->bsrInfo, RFAILED);
+      }
+   }
+   return (ret);
+}
+
+
+/*******************************************************************
+ *
+ * @brief sch Process pending Sr or Bsr Req
+ *
+ * @details
+ *
+ *    Function : updateBsrAndLcList
+ *
+ *    Functionality:
+ *       Updating the BSRInfo in UECB and Lclist
+ *
+ * @params[in] SchCellCb *cell,  SlotTimingInfo currTime 
+ * @return ROK     - success
+ *         RFAILED - failure
+ *
+ *******************************************************************/
+void updateBsrAndLcList(CmLListCp *lcLL, BsrInfo *bsrInfo, uint8_t status)
+{
+   CmLList *node = NULLP, *next = NULLP;
+   LcInfo *lcNode = NULLP;
+
+   if(lcLL == NULLP)
+   {
+      DU_LOG("\nERROR --> SCH: LcList not present");
+      return;
+   }
+
+   if(lcLL->count)
+   {
+      node = lcLL->first;
+   }
+   else
+   {
+      /*lcLL is empty*/
+      return;
+   }
+
+   while(node)
+   {
+      next = node->next;
+      lcNode = (LcInfo *)node->node;
+      if(lcNode != NULLP)
+      {
+          /*Only when Status is OK then allocation is marked as ZERO and reqBO
+           * is updated in UE's DB. If Failure, then allocation is added to reqBO 
+           * and same is updated in Ue's DB inside BSR Info structure*/
+         if(status == ROK)
+         {
+            lcNode->allocBO = 0;
+         }
+
+         lcNode->reqBO += lcNode->allocBO;
+         bsrInfo[lcNode->lcId].dataVol = lcNode->reqBO;
+         if(lcNode->reqBO == 0)
+         {
+            handleLcLList(lcLL, lcNode->lcId, DELETE);
+         }
+      }
+      node = next;
+   }
+}     
 /**********************************************************************
   End of file
  **********************************************************************/