lunes, julio 16, 2007

NTT DoCoMo tests next-gen 'Super 3G'

July 13, 2007 (IDG News Service) -- TOKYO -- NTT DoCoMo Inc. has embarked on a monthlong experiment of a Super 3G (third-generation) cellular system.

The indoor experiment will test data transmission speeds. NTT DoCoMo hopes to hit a downlink speed of 300Mbit/sec., it said Friday. The first trials will involve the use of a single antenna on both the transmitter and receiver, and later use of up to four multiple-input, multiple-output antennas. The tests will also look at the speed with which communications can be handed over from one base station to another.

Super 3G, which is also known by the acronym LTE (long-term evolution), uses the same radio spectrum band as current 3G services, but that's one of the few similarities. Super 3G allows for a number of different bandwidth channels and uses different modulation systems to transmit the data. It is envisaged to eventually allow data links at 80Mbit/sec. to the network and 300Mbit/sec. from the network.

NTT DoCoMo, Japan's largest cellular carrier, has been working on Super 3G for some time and anticipates introducing the technology in Japan sometime around 2009, as a stepping stone between current so-called 3.5G technology and future 4G (fourth-generation) systems.

The company has also been aggressively pursuing 4G system development. In late December, the carrier came close to hitting a 5Gbit/sec. data transmission speed from an experimental 4G system to a receiver moving at 10 kilometers per hour.

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