}
tbSize = 0; /* since nPrb has been incremented, recalculating tbSize */
tbSize = schCalcTbSizeFromNPrb(numRb, mcs, numPdschSymbols);
-
+ 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;
numPrb = ceil((float)nre / nreDash);
return numPrb;
}
+
/**
* @brief calculation of transport block size.
*
**/
uint16_t schCalcTbSizeFromNPrb(uint16_t numPrb, uint16_t mcs, uint8_t numSymbols)
{
- uint16_t tbSize = 0;
- uint16_t tbsIndex = 0;
- uint16_t nre = 0;
- uint16_t nreDash = 0;
uint8_t qm = mcsTable[mcs][1];
uint16_t rValue = mcsTable[mcs][2];
- uint8_t numLayer = 1; /* v value */
+ uint16_t tbsIndex = 0;
+ uint32_t tbSize = 0;
+ uint32_t nre = 0;
+ uint32_t nreDash = 0;
+ uint32_t nInfo = 0;
+ uint32_t n = 0;
+ uint32_t nInfoDash = 0;
+ uint32_t c = 0;
+ const uint8_t numLayer = 1;
+ const uint16_t numRbSc = 12;
+ const uint16_t numDmrsRes = 12;
+ const uint16_t sf = 1;
+// uint16_t numPrbOvrHead = 0;
- /* formula used for calculation of rbSize, 38.213 section 5.1.3.2 *
- * Ninfo = Nre . R . Qm . v where [ NInfo is tbSize] *
+ /* formula used for calculation of rbSize, 38.214 section 5.1.3.2 *
+ * Ninfo = Nre . R . Qm . v where [ NInfo is tbSize] *
* Nre' = Nsc . NsymPdsch - NdmrsSymb - Noh *
* Nre = min(156,Nre') . nPrb */
-
- nreDash = ceil( (12 * numSymbols) - NUM_DMRS_SYMBOLS - 0);
-
- if(nreDash > 156)
- nreDash = 156;
+ nreDash = MIN(156, ceil( (numRbSc * numSymbols) - numDmrsRes - 0));
nre = nreDash * numPrb;
- tbSize = ceil(nre * qm * numLayer * rValue/1024.0);
- tbSize = ceil(tbSize/8.0);
-
- while(tbSize > tbSizeTable[tbsIndex])
+ nInfo = ceil(nre * qm * numLayer * rValue/(1024.0 * sf));
+
+ if(nInfo <= 3824)
{
- tbsIndex++;
+ n = MAX(3, (uint32_t)cmLog2(nInfo) - 6);
+ nInfoDash = MAX(24, (1<<n)*(nInfo/(1<<n)));
+ while(nInfoDash > tbSizeTable[tbsIndex])
+ {
+ tbsIndex++;
+ }
+ tbSize = tbSizeTable[tbsIndex];
+ }
+ else
+ {
+ n = (uint32_t)cmLog2(nInfo - 24) - 5;
+ nInfoDash = MAX(3840, (1<<n)*ceil((nInfo - 24)/(1<<n)));
+
+ if(rValue<256)
+ {
+ c = ceil((nInfoDash + 24)/3816);
+ tbSize = 8 * c * ceil((nInfoDash + 24)/(8 * c)) - 24;
+ }
+ else
+ {
+ if(nInfoDash > 8424)
+ {
+ c = ceil((nInfoDash + 24)/8424);
+ tbSize = 8 * c * ceil((nInfoDash + 24)/(8 * c)) - 24;
+ }
+ else
+ {
+ tbSize = 8 * ceil((nInfoDash + 24)/(8)) - 24;
+ }
+ }
}
- tbSize = tbSizeTable[tbsIndex];
-
return tbSize;
-
}
/**
* @brief fetching ueCb from cellCb