Using HARQ, an erroneous package will be stored at the receiver and a retransmission will be requested. Even if the retransmission is faulty, the receiver attempts to combine the two erroneous packages to reproduce the original package.
What is Difference between ARQ and HARQ
ARQ (Automatic Repeat Request), which is used in UMTS, a package received in error will be discarded and a retransmission will be requested. If the retransmission is also erroneous, another retransmission will be requested.
