Summary

Recommendation ITU-T J.1109 describes the high level general and system requirements for in-band full-duplex in a hybrid fibre coaxial (HFC) based network.

Keywords such as ultra-high-resolution content delivery, end-to-end access service proliferation, high-speed transmission and broadband transmission are becoming the basic requirements for network providers who are responsible for data transmission and reception.

In particular, as various IoT services, personal media and cloud-based services gradually become common, there is a demand for high data rate for subscribers.

Cable networks are also undergoing various network evolution processes to develop and apply technologies that satisfy the requirements of the service ecosystem.

Currently, cable broadcasting networks have limited upstream frequency bands that can transmit data.

In order to overcome these limitations and enable symmetric upstream and downstream transmission, in-band full-duplex (IFDX) transmission technology that enables simultaneous transmission and reception in the same band is being developed.