Optus says it has successfully trialled Time Division Long Term Evolution Advanced (TD-LTE-A) carrier aggregation, achieving single user peak speeds of over 160Mbps on its commercial ‘4G Plus’ network earlier this month. Prior to the trials over a live network, Optus noted that it had tested the technology at its test facility in St Marys, west of Sydney, achieving a throughput of 520Mbps by combining four 20MHz channels of the 2300MHz spectrum band. Meanwhile, with regards to the live network tests which took place in Melbourne, Optus said it had joined two 20MHz channels in the 2300MHz band together, with that level of carrier aggregation said to be capable of delivering theoretical maximum speed of up to 220Mbps to a single user on compatible mobile devices.
As previously reported by CommsUpdate, in September 2013 Optus revealed that it was launching commercial services over a TD-LTE network operating using 2300MHz spectrum; at that date it had already begun offering 4G services Frequency Division LTE (FD-LTE) technology in the 1800MHz band. Today, Optus’ TD-LTE infrastructure is available in select areas of Melbourne, Sydney, Brisbane, Adelaide and Canberra and offers customers additional capacity to connect to a 4G network, as customers with compatible mobile devices can connect to either of cellco’s 1800MHz or 2300MHz infrastructures.
With regards to the technology trials, Vic McClelland, managing director of Optus Networks, said: ‘This is the first time in the world that 4G carrier aggregation has been introduced into a live TD-LTE network; not in a lab, but on a fully operational, commercial network … Our abundant spectrum holdings in the 2300MHz band; new technologies like carrier aggregation; and our 4G Plus TD-LTE network are the foundations of the Optus network of the future.’