HSDPA (High-Speed Downlink Packet Access)
HSDPA (High-Speed Downlink Packet Access) is a packet-based mobile telephony
protocol used in 3G UMTS radio networks to
increase data capacity and speed up transfer rates. HSDPA, which evolved from the WCDMA standard, provides
download speeds at least five times faster than earlier versions of UMTS, allowing users of HSDPA
networks a broader selection of video and music downloads. HSPDA specifies data transfer speeds of
up to 14.4 Mbps per cell for downloads and 2
Mbps per cell for uploads. In practice, users are more likely to experience throughput
speeds of 400-700 Kbps, with
bursts of up to 1 Mbps.
In the United States, Cingular has a 3G/HSDPA network called BroadbandConnect. Cingular competes
with Verizon Wireless and Sprint, which use a different 3G technology for broadband called EV-DO. One of the primary
differences between HSDPA and EV-DO networks is that HSDPA allows mobile handsets to transmit voice
and data simultaneously.
This was last updated in May 2007
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