Vodafone UK and Huawei are conducting technical trials of a new mobile technology, 4.5G (TDD+) with LTE TDD, to significantly increase the capacity and efficiency of its 4G network in urban areas, as well as lay the foundations for the introduction of 5G by 2020.
New 4x4 MIMO (Multiple-Input Multiple-Output) techniques eight-way transmit and receive (8T8R), together with multi-user beam-forming are being tested in Manchester. These will support the expected rapid growth in video and virtual reality applications with the arrival of next generation smartphones.
Unlike traditional methods of transmitting mobile signals between base stations and mobiles, beam forming and four-way receiver diversity significantly improve performance in heavily built up areas, by combining the signals from multiple angles and co-located antennas in order to reduce interference and improve throughput. The trial involves 4x4 versions of MIMO in order to deliver mobile data services at much greater speeds and with improved accuracy. The 8T8R beamforming concentrates the user-specific energy and multiplexes the resource between different users, thus increasing the average as well as the edge performance.
By combining MIMO with beam-forming, Vodafone is better able to focus customers’ mobile signals in specific directions to ensure the best user experience and minimise interference during peak times in highly populated areas. As a result, more signal reaches more subscribers particularly at the edge of the base station coverage, in order to provide higher average speeds across the network.
