A PLC/VDSL2 coexistence method based on noise injection on powerline during VDSL2 initialization

摘要

The indoor PLC (Power Line Communications) and VDSL2 (Very high bit-rate Digital Subscriber Line) technologies share the same frequency band up to 30 MHz. Behind the VDSL2 access network, the power line network is envisaged to be used like an home network in order to transit TV flows from the VDSL2 modem to the set-top-box. In many customer premises, power line cables are nearby telephone cables and consequently unwanted coupling could occur generating hence VDSL2 QoS decrease. This paper describes an EMC method to ensure the coexistence between PLC and VDSL2 technologies in the home network. This method is based on the injection, on the powerline, of a white noise during the initialization procedure of the VDSL2 modem.