High Speed Uplink Packet Access (HSUPA) is an enhancement of the UMTS radio interface that boosts uplink data rates. HSUPA achieves this by introducing an Enhanced Dedicated Channel (E-DCH). In UMTS Release 6, HSUPA is denoted as E-DCH. HSUPA enhances uplink dedicated transport channel coverage, throughput, and reduces latency. It complements HSDPA, which enhances downlink data rates.