G.9972 (also known as G.cx) is a Recommendation developed by ITU-T that specifies a coexistence mechanism for networking transceivers capable of operating over electrical power line wiring. It allows G.hn devices to coexist with other devices implementing G.9972 and operating on the same power line wiring.
|Common name||IEEE standard|
|Common name||ITU-T recommendation|
|G.hn/HomeGrid||G.9962 (Management Plane)|
|G.hn/HomeGrid||G.9964 (PSD Management)|
- Frequency-division multiplexing (FDM), in which the available spectrum is divided in two parts: frequencies below 10 or 14 MHz (specific value can be selected by the access network) are reserved for the access network, while frequencies above them are reserved for the in-home network.
- Time-division multiplexing (TDM), in which the available channel time is split equally between both networks. 50% of time slots are allocated for the access network, and 50% are allocated to the in-home network.
- Berger, Lars T.; Schwager, Andreas; Galli, Stefano and Pagani, Pascal; Schneider, Daniel M.; Lioe, Hidayat. (February 2014). "10". In Berger, Lars T.; Schwager, Andreas; Pagani, Pascal and Schneider, Daniel M. (eds.). Current Power Line Communication Systems: A Survey. Devices, Circuits, and Systems. CRC Press. pp. 253–270. ISBN 9781466557529.CS1 maint: Multiple names: authors list (link)
- UNITED NATIONS ITU-T RATIFIES G.HN STANDARD FOR WIRED HOME NETWORKING, HomeGrid Forum Press Release
- United Nations ITU-T's G.hn Approved as Global Standard for Wired Home Networking