NTT DoCoMo will soon start testing an exerimental Super 3G network which could reach speeds of 300Mbps (37.5MB/s).
The company has already begun accepting proposals from suppliers and hopes to implement the Super 3G system in Japan by 2009.
The company said that it planned to start experimenting with Super 3G in an indoor setting with only one transmitting antenna and one receiving antenna. From there, NTT DoCoMo plans to expand the experiment by using four Multiple-Input Multiple-Output (MIMO) antennas on both the transmitting and receiving side. The ultimate goal will be not only to achieve 300Mbps down but also to look at how well handovers will be handled between towers.
Super 3G is another name for High Speed OFDM Packet Access (HSOPA), which is meant to come next after HSDPA and HSUPA technologies, as published by the 3rd Generation Partnership Project (3GPP). Super 3G succeeds 3G in both data rates and spectrum efficiency, and NTT DoCoMo hopes that implementing Super 3G in Japan by 2009 will help the company make a smoother transition to 4G technologies in the future.