In a press release, Nokia has confirmed the launch of tests in the 4.5GHz band with Japanese mobile operator NTT DOCOMO, part of an ongoing plan to develop a 5G ecosystem in the country. The next generation wireless network trials, which use the Intel 5G Mobile Trial Platform, will commence with the key interoperability testing of multi-vendor technology using the 4.5GHz frequency band, the vendor said. Nokia will conduct trials of 5G technology with DOCOMO in the Tokyo metropolitan area throughout 2017, focusing on busy tourist, shopping and business locations as well as at key public events hosted by the operator. The tests will use the Finnish group’s ‘5G FIRST’ solution, which it notes uses the Nokia AirScale base station using Massive MIMO (Multiple-Input Multiple-Output) technology with digital beamforming, transmitting over a 5G radio interface to the Intel 5G Mobile Trial Platform. Under the trials, the pair will try out end-to-end applications over the air between the base station and the device on the 4.5GHz frequency band, which is one of the candidate bands for 5G in Japan.