as good and fast UMTS and HSDPA are, it's still quite "limited" in downstream to
14.4 Mbps (even if this is already faster then my DSL line can offer).
Nevertheless, NTT DoCoMo, Inc. is already heavily working on the development of
the 4G standard and announced today that this month it began testing an
experimental Super 3G system for mobile communications. With this experiment,
DoCoMo will seek to achieve a downlink transmission rate of 300 Mbps over a
high-speed wireless network (even if 100 Mbps is the current target for 4G
Super 3G features low-latency data transmission and improved spectrum
efficiency. It is a highly advanced version of High-Speed Downlink Packet Access
(HSDPA) and High-Speed Uplink Packet Access (HSUPA), which have been evolved
from W-CDMA packet transmission technologies standardized by the 3rd Generation
Partnership Project (3GPP). The 3GPP, a telecommunications standards
organization, is currently discussing standardization of Super 3G under the name
Long Term Evolution (LTE).
DoCoMo will begin with an indoor experiment to test transmission speed using
one transmitting and one receiving antenna. The company will then expand the
experiment to examine downlink transmission by employing up to four
Multiple-Input Multiple-Output (MIMO) antennas for both the base station
(transmission side) and mobile station (receiving side); the goal is to achieve
a downlink transmission speed of 300Mbps. MIMO is an antenna technology for
wireless communications in which different data streams are spatially
multiplexed using multiple antennas for both transmission and reception on the
same frequency. Also to be examined is the "handover function" - switching of
the connection between two base stations.
DoCoMo will also examine the functionality of applications for voice and
image transmission, games and the like, key capabilities impacting the Super 3G
DoCoMo, aiming to achieve sustainable, efficient use of 3G spectrum
resources, is leading the discussion over LTE. DoCoMo believes Super 3G will
allow the company to make a smooth transition to 4G in the future.
All the stuff above sounds pretty impressive and I'm definitely looking
forward the 4G development and first live networks (which we will not see before
2010 anyway) but I wonder how mobile devices like Windows Mobile smartphones can
handle this amount of data. I mean, if you take a TI OMAP CPU at 200 MHz or a TI
CPU at 400 MHz, it's a lot of data this CPUs have to process within a second.
Looks like we will also need a new CPU generation, something better then ARM and
Bulverde. But chip designers also have time until 2010 - so I'm confident the
CPUs are ready if the networks are available.
Cheers ~ Arne