hspa
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HSPA
(High Speed Packet Access) A family of high-speed 3G and 4G digital data services available to GSM carriers worldwide. The service works with HSPA cellphones as well as laptops and portable...
Dictionary
Definition: HSPA
(High Speed Packet Access) A family of high-speed 3G and 4G digital data services available to GSM carriers worldwide. The service works with HSPA cellphones as well as laptops and portable devices with HSPA modems. Although based on WCDMA, HSPA is a major enhancement with more channels and different modulation and coding techniques. In addition, HSPA can recover faster from errors than WCDMA (see HARQ). HSPA was deployed in 2005, starting with HSDPA in the U.S. (see chart below).
HSPA+, also called "I-HSPA" and "HSPA Evolved," supports multiple antennas (see MIMO). HSPA+ has been designated as a 4G technology by the ITU (see 4G). See DC HSPA.
Following are the HSPA versions along with WCDMA and LTE for comparison. See LTE, 3GPP, cellular generations, cellular vs. Wi-Fi, WCDMA, TDMA and GSM.
(Mod) = modulation method
Maximum Maximum
Downlink Uplink
Speed Speed
Type Mbps (Mod) Mbps (Mod)
Wideband CDMA
WCDMA 0.4 (QPSK) 0.4 (QPSK)
HSDPA (HS Downlink PA) 3G+, 3.5G
3GPP Release 5
HSDPA 14.4 (16QAM) 0.4 (QPSK)
HSUPA (HS Uplink PA) 3G+, 3.5G
3GPP Release 6
HSUPA 14.4 (16QAM) 5.7 (QPSK)
HSPA+ 4G
3GPP Release 7
Non-MIMO 14 (16QAM) 5.8 (QPSK)
Non-MIMO 21 (64QAM) 11.0 (16QAM)
MIMO 28 (16QAM) 5.8 (QPSK)
11.0 (16QAM)
HSPA+ 4G
3GPP Release 8
MIMO 42 (64QAM) 5.8 (QPSK)
11.0 (16QAM)
5.8 (QPSK)
11.0 (16QAM)
LTE 4G
3GPP Release 8
115 (16QAM) 58 (16QAM)
173 (64QAM) 86 (64QAM)
LTE-A Future 4G (perhaps 5G?)
3GPP Release 10
See LTE.
1 Gbps
Support for 3G HSDPA and 2G EDGE
If an iPhone 3G is in range of a 3G cell tower, it uses the higher speed of HSDPA. However, it throttles down to the lower-speed EDGE (E) channel if a 3G HSDPA channel is not available. See HSPA.
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