Definition: HSDPA is a protocol for data communications on cellular networks. HSDPA supports theoretical data rates of 1.8 Mbps and up to 14.4 Mbps maximum, although typical speeds are closer to 500 Kbps.
Telecommunications companies like Cingular that have been using the slower UMTS protocol are upgrading to HSDPA as a move to so-called "3G" mobile networks. Besides being built into new cell phones, certain cellular cards (network adapters) for laptops also support HSDPA. Technology standards competing with HSDPA include EV-DO and WiMax.
Also Known As: High-Speed Downlink Packet Access, 3.5G
Common Misspellings: HSPDA
Examples: The Cingular BroadbandConnect cellular network in the U.S. utilizes HSDPA.
