Hello dear 5G experts,

How many Ofdm symbol per frame we need to carry L bytes PDU at Mac layer? Should the TBS be greater than L?

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You need to know the number of RBs, not OFDM symbols. The TBS should be greater than (L + overhead of upper layers + 10% redundancy)

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@Bannour_Ahmed

Minimum Ofdm symbols = (L*8+CRC)/codeRate/ModOrder

Where CRC is 24 or 16 depends on L, ModOrder is 2,4,6 or 8 and codeRate is typically between 0.07 and 0.93

Then you need to consider RB and slot boundaries as well as any overhead symbols within these boundaries e.g DMRS

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Thank for your reply,

If we go ahead with this analysis, so **in one packet** the minimum Ofdm symbols we have is :

Minimum Ofdm symbols* (N_RB=12). Am I right?

No. Ofdm symbols in my analysis are not limited to one subcarrier. No need to multiply.