Ericsson this week demonstrated a technology demonstration using LTE Advanced, for the Swedish Post and Telecom Agency (PTS). The demonstration, held in Kista, Sweden, featured wireless speeds of nearly 1 Gbps
The system bonded 3, 20MHz channels together (60MHz aggregated) in a mobile environment for the first time and used their commercial RBS 6000 basestation. Other demonstrations of ultrafast wireless broadband have been made by Huawei, which reached speed of 1.2 Gbps, using 80 MHz of multi-carrier channel space, along with 4×4 MIMO, and Samsung.
The International Telecommunication Union (ITU) defines IMT-Advanced as a true 4G system. They selected only two standards that fulfill ITU criteria of 100 Mbps (mobile) and 1 Gbps (fixed) speeds; LTE Advanced, which is incorporated into the 3GPP Release 10 global standard, and WirelessMAN-Advanced, incorporated into WiMAX 2.0.
The WiMax 2 specification is said to enable mobile speeds of 120Mbit/s (downlink) and 60Mbit/s (uplink) in an urban scenario using 4×2 MIMO (Multiple-Input/Multiple-Output) antennas on a 20MHz-wide channel. WirelessMAN-Advanced may be available for commercial operation in 2012. The first stages of LTE Advanced are expected to be in commercial operation in 2013.
LTE Advanced builds on LTE’s technical base and allows multiple 5 MHz or 10 MHz channels to be tied together and uses additional MIMO antennas and radios. In the Ericsson demonstration, 60MHz of aggregated bandwidth was used, along with 8×8 MIMO, with 8 antennas on the basestation and 8 on the client.