Huawei has successfully launched a Giga digital subscriber line (DSL) prototype. The Giga DSL system employs time division duplex (TDD) to achieve a total upstream and downstream rate of 1,000 Mbps over a single twisted pair.
While 100 Mbps-plus ultra-broadband access can be made available relatively quickly by utilizing legacy copper line resources, providing 1,000 Mbps bandwidth within 100 meters of twisted pairs using DSL technology is more complex.
By using low-power spectral density in-signal transmission, Huawei’s Giga DSL prototype reduces radiation interference and power consumption, and provides a total upstream and downstream rate of one Gbps within 100 meters, and 500 Mbps-plus within 200 meters – making it a cost-effective option for telecom operators building ultra-broadband access networks.
Giga DSL is a next-generation access technology solution that is growing quickly. In 2011, ITU-T set up a G.fast project team dedicated to formulating new standards for ultra-speed access at short distances, the aim being to achieve 500 Mbps access rate per twisted pair within 100 meters. Huawei has actively participated in the work of the team and has become a major technical contributor, having recently worked to incorporate TDD-OFDM (Orthogonal Frequency Division Multiplexing) as a G.fast modulation mode.