3G More Energy Efficent Than 2G

3G More Energy Efficent Than 2G

There are rumors in academic circles and in the media that 3G will lead to a dramatic increase in power consumption. This is not true. In fact, 3G will be more energy efficient than 2G as the next generation networks grow.

A gravely misleading study was recently reported in the Swedish daily Dagens Industri concluding that: "3G brings on the need for an additional nuclear reactor." The author has acknowledged that it was founded on hypothetical information and has turned to Ericsson for real facts concerning energy consumption.

A revision of the study can therefore be expected.

To put things into perspective: mobile telephony takes only 0.5% of an average user's total electricity consumption. This is offset by the technology's great potential to conserve energy. The first 3G products will initially require a marginal increase in energy demand, on the order of 10-15 percent. But over time, 3G will be more energy efficient than 2G, because it is built to handle more traffic.

This advantage over 2G gradually becomes more significant as the traffic in the network grows. In fact, it would take more energy to use only 2G technology for the growing number of mobile subscribers.

This is analogous to what happens when you build a new railroad: the cost per passenger will initially be higher but drop as the number of passengers increases.

A comparison of different generations of mobile communication systems reveals a 40 - 50 percent reduction in energy consumption over a four to five-year period. Advances in microelectronics and the fact that built-out systems use equipment more efficiently can partly explain this reduction.

The energy needed for 3G is small compared to the benefits it brings to society.

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