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High-Speed Packet Access
From Wikipedia, the free encyclopedia
| Mobile phone and data standards |
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| 1G |
| 2G |
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4G
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| Frequency bands |
High-Speed Packet Access (HSPA) is a collection of mobile telephony protocols that extend and improve the performance of existing UMTS protocols. Two standards HSDPA and HSUPA have been established and a further standard HSOPA is being proposed.
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The two existing standards (HSDPA and HSUPA) in the family provide increased performance by using improved modulation schemes and by refining the protocols by which handsets and base stations communicate. These improvements lead to a better utilization of the existing radio bandwidth provided by UMTS.
HSDPA provides improved down-link performance of up to 14.4Mbits/s theoretically. Existing deployments and handsets provide up to 3.6Mbit/s. Up-link performance is a maximum of 384 Kbit/s per second.
HSUPA provides improved up-link performance of up to up to 5.76Mbits/s theoretically. No existing commercial deployments of HSUPA are in operation and no handsets have been released.
The HSOPA is currently under development, aiming for maximum transfer rates of 100Mbps for the down-link and 50Mbps for the up-link.