Why can't we just calculate total the amount of data, which is to be send using amount of available REs for data transmission, code rate and modulation?

+2 votes

Why can't we just calculate total the amount of data, which is to be send using amount of available REs for data transmission, code rate and modulation?

0 votes

Due to the trade-off we need to take into account while designing a system. The trade-off need to answer the question: how detailed the scheduling info is? If we would need to tell the UE explicitly exact number of bits we send in the transport block, that would be a huge amount of data seen as signalling. Therefore we have a limited number of options for transport block size, so that we may use low number of bits to point to one of these options.

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