2. The UE receives it but it is erroneous. The TB is stored in a buffer.
3. The UE transmits directly a NACK concerning the erroneous block on the PUCCH.
One HARQ entity in the UE and the e-UTRAN
Each process handles STOP and WAIT HARQ protocol
2. The UE receives it. Even if the retransmitted TB (Transport Block) is erroneous, the UE can try to recombine the 2 TB to have a correct one.
3. The UE send a ACK on the PUCCH.