HARQ
Hybrid Automatic Repeat reQuest
ProtocolIntroduced Rel-5
Definition
A retransmission mechanism combining forward error correction with ARQ, using soft-combining of failed and retransmitted data.
Evolution Across Releases
- NR (Rel-15) reduced round-trip time versus LTE and added support for up to 16/32 HARQ processes for high-throughput scheduling.