HSDPA High-Speed Downlink Packet Access (HSDPA) is also known as High-Speed Downlink Protocol Access. HSDPA is a protocol for mobile telephones. It is a third-generation (3G)
High-Speed Packet Access technology designed to speed up network capacity and data transmission rate of cellular phones. HSDPA is associated with various Universal Mobile Telecommunications System (UMTS) networks. These include the Global System for Mobile
(GSM) Communications.
Currently, HSDPA can support speeds ranging from 1.8 Mbps to 14.4 Mbps. While this is not very fast compared to various wired networks, it is a major milestone considering the speed available to cellular
technology. Although HSDPA is mostly identified with its downlink speeds, it also has the ability to greatly expand
transfer capacity. HSDPA networks can transfer up to 30GB of data monthly and as
much as 300 minutes of cellular television viewing and 1000 minutes of talk time.
Current HSDPA Technology At present, there are 100 HSDPA-
capable networks operating in 54 countries worldwide. A large number of these networks offer 3.6 Mbps downlink speeds. However,
more networks are beginning to switch to faster 7.2 Mbps
downlink speeds. Only a number of networks presently offer a full 14.4 Mbps speed
HSDPA competes with a rival format, the Evolution Data
Optimized ( EVDO ) provided by Code Division Multiple Access (CDMA) cellular providers.
Future HSDPA Technology Although 14.4 Mbps is the current cap on downlink speed over HSDPA, networks are
preparing to be upgraded with a new type of HSDPA system.
Dubbed as HSPA Evolved, this new HSDPA technology is
designed to increase download speeds to 42 Mbps upon release, with the possibility of
reaching greater speed values in the future.
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