3G/UMTS

HARQ - HSUPA

Uses Synchronous HARQ

The terminal should keep the unacknowledged data in the memory for any possible retransmission

Both Soft(Chasing) combining and Incremental Redundancy can be applicable.

< 10 ms TTI >

Max 4 HARQ Process are being used.

< 2 ms TTI >

Max 8 HARQ Process are being used.