O2 has announced
that it is working on two Massive MIMO (multiple input, multiple output) trials at Kings Cross and Marble Arch with Nokia in order to pave the way for full deployment of 5G across the capital city. The firm chose the locations due to their high levels of data traffic; this will allow O2 to evaluate the technology before rolling it out to other urban areas. The technology will work on 4G initially, however, Massive MIMO is a core component of 5G networks too, so they'll be adapted for that purpose later on after they've been trialled. Massive MIMO sends beams of data from antennas to end user devices in a way which is supposed to help with performance and capacity of the network, allowing more users to be served by the network.