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DEVELOPMENT: NTT DoCoMo begins Super 3G experiment with up to 300 Mbps
Posted by Arne Hess - on Tuesday, 17.07.07 - 16:54:46 CET under 01 - General News - Viewed 9808x
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Sure, 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 networks).

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 system's marketability.

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


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