Some 64 operators have commercially launched LTE Advanced systems in 39 countries, according to a latest update from the Global mobile Suppliers Association (GSA). Around 30 per cent (116) of LTE operators worldwide are now investing in carrier aggregation technology and are at various stages of deployment. Carrier aggregation is the first LTE Advanced feature to be commercialised and facilitates higher data throughput rates and a more efficient use of spectrum assets. Most (80 per cent) LTE Advanced system deployments support Category 6 user devices, which 3GPP defines as covering the range above 150 Mbps up to 300 Mbps downlink data throughput, and 50 Mbps on the uplink. Release