HSDPA (High Speed Downlink Packet Access) is a UMTS radio-interface enhancement that introduces a high-speed downlink shared channel (HS-DSCH) to achieve higher data rates. It offers theoretical peak data rates of around 14 Mbps and provides average user data throughput speeds of 550-1100 kbps with lower network latency. Implementing HSDPA requires software and hardware modifications to base stations (Node B) and a software upgrade for the Radio Network Controller (RNC). Users also need new terminals to take advantage of HSDPA.