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Fujitsu Super 3G Wireless Base Station Equipment Achieves Downlink Speed of 900Mbps


In November 2006 Fujitsu Limited was selected by NTT DoCoMo, Inc. to develop and manufacture prototypes and commercial equipment for DoCoMo’s “Super 3G” wireless base stations. Since then, DoCoMo and Fujitsu Laboratories Limited have made progress in jointly developing prototype wireless base station equipment, and maximum downlink transmission speeds of approximately 900Mbps have now been achieved through the application of MIMO(1) technology, a core technology for high-speed, high-volume wireless communications.

Designed to replace DoCoMo’s current 3G mobile phone system (FOMA), Super 3G is DoCoMo’s next-generation specification for a wireless system for broadband communication over a mobile phone. To bring about dramatic improvements in performance, such as increasing the speed of data transmission, shortening connection delays, and improving efficiency in the use of the spectrum, the 3GPP(2) international standards organization is working on creating a new standard specification called LTE(3).

Since being selected to develop and manufacture DoCoMo’s Super 3G wireless base station equipment, Fujitsu and Fujitsu Laboratories have worked with DoCoMo in developing the required technologies, and the companies have succeeded in developing a prototype wireless base station that achieves maximum downlink transmission speeds of approximately 900Mbps when using four antennas each (4x4 MIMO) for Super 3G base station transmission and mobile station reception as well as employing Fujitsu Laboratories’ short-delay, high-speed error correction decoding technology.

Going forward, along with applying the results of development and evaluation work on MIMO and other Super 3G prototype technologies, Fujitsu will work to further refine the high-efficiency amplifiers and high-performance baseband processing technology it has developed for 3G wireless base station equipment in order to develop optimized commercial Super 3G wireless base station equipment that is compact, energy-efficient, economical, and highly scalable.

Fujitsu’s prototype equipment will be exhibited at CEATEC Japan 2007, to be held from October 2 to 6 at the Makuhari Messe International Convention Complex in Chiba, Japan.

1 MIMO (Multiple-Input Multiple-Output): Spatial multiplexing transmission technology that, using the same frequency, simultaneously transmits and receives different signals from multiple antennas. As a core technology of Super 3G communications, it enables a dramatic increase in the speed of wireless transmissions without increasing the frequency bandwidth.
2 3GPP (3rd Generation Partnership Project): A partnership project to create detailed specifications for IMT-2000 W-CDMA. Standard-setting organizations for each country or region will adopt the specifications created by the 3GPP as the standards for their respective country or region. Its membership consists of many companies and organizations, including the world’s major companies involved in mobile communications.
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3 LTE (Long Term Evolution): The name given to the Super 3G specification standard by the 3GPP.


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