So what exactly is known about G.hn? It’s known that the anticipated future worldwide standard for wired home networking will work over coax, powerline and phone wires. The group has targeted 1 Gbit/s data rates over coax which should translate into 500Mbit/s or higher user throughput (what you get after subtracting the overhead). But that isn’t the whole story so read on.
Fast isn’t enough, it also has to be reliable and predictable over the entire house. That’s easier to do over communication media like coax and phone wires, not so easy over powerline. A lot of design and analysis effort is going into making G.hn robust. The more robust it is, the less the headaches later. To make this happen you need the kind of input that only comes from experience; which is why we are so excited about the participation of so many leading home networking technology companies.
Beyond speed and reach, it’s a given that G.hn will provide features such as guaranteed QoS (sometimes called parameterized QoS) that are as good or better than those provided by the current crop of existing-wire home networking technologies. HomePNA 3.1, for example, has featured guaranteed QoS since the HomePNA 3.0 spec was released in 2003 (both the HomePNA 3.0 and 3.1 are ITU standard G.9954. Other home networking technologies claim to support guaranteed QoS but since they are not all open standards it’s hard to verify this.
Other features such as hooks for remote management and diagnostics (see April 14 Blog “Got TR-069”) play a central role in service provider deployment and support plans so the ability to verify network performance – both during installation and remotely from the central office - are also a given.