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 30 GB of data monthly and as much as 300 minutes of cellular television viewing and 1000 minutes of talk time
