HSDPA and its Evolution

A budding woman entrepreneur has to give a speech to the students of National University of Singapore. Her husband who has been her motivation and support was struck in a traffic jam. She wanted her husband to watch her speak live. She just made a video call to her husband. Thanks to mobile broadband.


HSDPA (High Speed Data Packet Access or High Speed Downlink Packet Access) is one of the latest 3G technologies, which enables higher data speeds and capacity by increasing efficiency. It’s an extension of W-CDMA. It is proposed in the 3GPP release 5. HSDPA aims at achieving peak transmission of 14.1 Mbps.


HSDPA provides improved performance through Adaptive Modulation and Coding (AMC), fast packet scheduling at the base station and fast retransmission with the concept hybrid automatic repeat request (HARQ).


HSDPA enabled mobile devices are popularly marketed as mobile broadband. This mobile broadband is deployed in 55 countries, though not in India yet. We are dreaming of mobile broadband in India within the next 3 years.


Accessing high speed Internet on the move and eliminating an unnecessary landline connection which most of us seldom use these days are cited as the major advantages of mobile broadband. High quality video streaming has been another one of the greatest achievements of this advanced 3G technology.


This mobile broadband made it possible for video call with high quality live video streaming. One can watch a movie without having to previously download it or any much use of his mobile device memory just by live video streaming.


Out bidding HSDPA, the next version of HSDPA, HSDPA Evolution has evolved recently. HSDPA Evolution aims at achieving peak transmission of 42Mbps. It was proposed in the 3GPP release 7.


HSDPA Ev uses Beam-forming and Multiple Input Multiple Output (MIMO) concepts. Beam forming focuses the antenna’s signal in the user’s direction. MIMO uses multiple antennas at the sending and receiving ends.


Australia’s Telstra network which provides one of the fastest HSDPA connectivity across the globe up to 21Mbps is now planning to increase this speed to 42 Mbps. This doubling of speed is possible by HSDPA Evolution.


Though currently HSDPA network is not available wide, this network is soon expected to span the longitudes and latitudes of the globe. Regardless of the current day disadvantages like multi user load balancing, high cost per kb of usage of HSDPA this technology grows at a rapid pace.


With HSDPA the world will shrink smaller and be a better place to live in.


Shanketh R

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