G.hn Wave 2 Technologie

 

G.hn (Gigabit Home Network) is a recognized term for the most advanced type of home networking technology. Its basic technical standards G.9960 and G.9961 were developed by the International Telecommunication Union(ITU) and promoted by the HomeGrid Forum industry association and other organizations.

Instead of high quality Ethernet cables, G.hn uses any kind of phoneline and coax cables as well as power lines for data transmission and reaches comparable speeds.

The idea behind G.hn technology is that you can use your existing phone and TV cables for home networking instead of rewire the building with new Ethernet cables, which would require a lot of work and expense. G.hn technology is very easy to use - even for private consumers and technical laymen.

G.hn Standard is designed for the transmission of Ethernet packets of any kind. It can be used flexibly - even on the "last mile" for Internet connections.

The most important features of G.hn from the user's perspective are:

  • Physical data rate 1.7 Gbit/s (download + upload). At application level - 1.5 Gbit/s .
  • Download and upload rates are freely configurable, symmetrical data rates are possible
  • Compatibility with IPv4 and IPv6
  • Any kind of phoneline and coax cables can be used. The connection via phoneline cables is "point-to-point", via coax cables up to 16 participants are possible on the one wire
  • Data transmission via phone line can be done in SISO (1 wire pair) and MIMO (2 wire pairs) mode.
  • Transmission rates of 1 Gbit/s at application level are possible with coax cables up to approx. 800 meters, via phone line up to approx. 250 meters (MIMO) or approx. 150 meters (SISO)
  • Connectivity up to approx. 1800 meters (coax) or 800 meters (phoneline) is possible
  • Used frequency spectrum 2-200 MHz (coax and SISO) or 2-100 MHz (MIMO), individual ranges can be blocked if required
  • Coexistence with ADSL (no overlapping of frequency ranges) and VDSL (due to low signal level of G.hn)

Advantages of G.hn compared to other technologies

Commercial benefit:

  • Fast and inexpensive implementation (no need for rewiring)
  • Fast ROI (low investment costs)
  • Standardized technology
  • Many reference projects worldwide

High performance

  • Very fast transmission rates (up to 1.7 Gbit physical data rate. 1.5 Gbit at application level.)
  • Very stable and secure connection (based on cables)
  • Large coverage (distance >500 meters)
  • Performance comparison with VDSL and G.fast

 

By the way, the G.hn approach is not completely new. It is the successor of HomePNA - a standard for home networks via phone and TV cabling developed between 1990 and 2009. HomePNA achieved data rates of up to 320 Mbps and was used extensively in the USA and several other countries. Many former HomePNA sponsors now support G.hn. In May 2013, the HomePNA alliance and the HomeGrid Forum merged. Meanwhile the association is called GiGA Wire Alliance.