DoCoMo has announced their latest speed trials in the march towards Super 3G or so-called LTE technologies. According to the press release they have refined the experimental system using an actual wireless environment near its R&D labs in Yokosuka Research Park to record a downlink transmission rate of 250Mbps in the 20MHz bandwidth, the maximum under new Super 3G standards. DoCoMo is continuing to test connection handover from one base station to another, and the functionality of applications in indoor and outdoor environments.
Super 3G, which features low-latency data transmission and high spectrum efficiency, is an evolution beyond the High-Speed Downlink Packet Access (HSDPA) and High-Speed Uplink Packet Access (HSUPA) protocols of W-CDMA, an original technology for 3G packet transmissions. Super 3G, also known as Long Term Evolution (LTE), is being standardized by the 3rd Generation Partnership Project (3GPP) and core specifications have been approved already. DoCoMo began accepting proposals from suppliers for Super 3G test equipment in July 2006.
By 2009, the company expects to complete development of the technologies required for the eventual launch of a Super 3G network. They also provided this .pdf file and promised to reveal more details during CTIA in Las Vegas next week.
More info about previous DoCoMo speed trials out at
Daytona Yokosuka Here.