Motorola releases findings from its HSDPA trial

Motorola today released three latest findings from its HSDPA (High Speed Downlink Packet Access) trial results in Europe.

The HSDPA trial centered on user experience and how to ensure high customer satisfaction at the launch. A video of Motorola’s HSDPA trials is now available from http://www.motorola.com/content/0,,2033-8202,00.html

Results of the varied trials revealed three guidelines that operators should take into account when implementing high speed services across an HSDPA network:

1. Sufficient processing power needed to reduce latency

HSDPA will provide high speed but can be prone to delays when using applications such as web browsing. These delays can be attributed to a mechanism known as “state switching” which effectively moves a user from a high to a low speed state based on user activity without the user being aware. The solution – avoid switching users down from a high to a low speed state regardless of user activity.

2. Adopt key handset functionality for improved mobile performance
The performance of HSDPA is heavily dependent on device or handset capability. A signal processing function known as an equaliser enhances performance when the user is moving. Initial trial results demonstrate an increase in data rates of as much as 40 percent for devices that support equalization. Today only a few device manufacturers claim to have equaliser functionality.

3. Video services need priority
The trials concluded that video streaming performance degrades when a relatively modest number of users are active. To compensate for this, operators must actively prioritize video over other services. Operators could defer video services on HSDPA to a later stage, but as video services consume a large amount of UMTS capacity they should be moved to HSDPA for improved efficiency. This will reduce the cost to deliver video services.

Much like the familiar fixed broadband services, HSDPA data transmission speeds to the end user should enable operators to both realize greater margins from existing offerings while launching new data rich products at competitive prices. Furthermore, it promises to smooth the transition of services like video streaming and music downloads from ‘high potential’ to commercially viable


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