G.hn Silicon Emerges from Vaporware Territoryby Ganesh T S on February 2, 2011 3:33 PM EST
- Posted in
- Powerline Adapters
CopperGate got hold of HomePlug AV silicon through their Conexant acquisition, and Sigma Designs got into the fray through the acquisition of CopperGate. Their Homeplug AV product CG2110 was unveiled in October 2009 In October 2010, I visited Sigma Designs and had the chance to see a working consumer product based on that chipset.
The interesting aspect was ClearPath, and this enabled the product to work in a much more efficient manner even in noisy environments and Power strips are a major no-no for the Intellon/Atheros based networking kits, but the units demonstrated by Sigma actually seemed to like communicating through them! The demonstrated product was supposed to ship to consumers in November, but they are yet to go on sale. Sigma currently says it will begin shipping towards the end of February.
The HomePlug product from Sigma also seemed to perform better than the Intellon/Atheros solutions in noisy situations. The reason for this attributed to ClearPath technology which relies on proprietary algorithms to find a way around the noise.
It would be ideal If what I saw in the labs translates to real world performance when products based on the CG2110 hits consumers. It looks like Sigma Designs is a generation behind Atheros in the HomePlug AV market. However, they seem to be delivering what Atheros should have done in the first place. All said, controlled lab demonstrations can only be trusted to a certain extent. The performance of these units once they are sent to reviewers and end consumers will reveal the true story.
CopperGate's Vision of the Wired Networking Industry (March 2009)
Even as CopperGate was acquiring Conexant's HomePlug technology, it was envisaging that G.hn would win the ultimate battle for wired networking technologies. After all, it was the proverbial holy grail, encompassing support for coax, phone lines and powerline in one product with promises of upto 1 Gbps bandwidth. In the above timeline presented by CopperGate in early 2009, it was expected that G.hn would completely replace HomePNA and HomePlug for phone and powerline networking in 2012. CES 2011 presented Sigma Designs / CopperGate with the ideal opportunity to show us what was being done towards achieving that goal.
Post Your CommentPlease log in or sign up to comment.
View All Comments
sabot00 - Wednesday, February 2, 2011 - linkThis seems to be a great alternative to Wi-Fi and Ethernet systems.
I personally would take an Wi-Fi + Ethernet system for its power but I can see the appeal.
mcnabney - Thursday, February 3, 2011 - linkI would say that it is a very poor option to wifi.
The key benefit is that there is no extension of the network outside of the home that an unscroupulous person could enter through.
Of course that eliminates the use of laptops (unless plugged into a specific location), cell phones and tablets - which is the direction the market is going. Not sure what kind of future in Powerline-based solutions since it ignores the growing segments of the market (unless you consider desktops to be a growing market).
derkurt - Sunday, February 6, 2011 - linkActually, Powerline is often used in combination with Wi-Fi. More precisely, it is used to extend the network from the point of entry (i.e., DSL/cable modem) to some other place where an access point is connected to a powerline modem. This way, you can have a Wi-Fi network covering your entire home without having to use repeaters, which each cut throughput in half and double latency times, and also without having to install Ethernet, which can be impossible due to restrictions imposed by landlords or very expensive and aesthetically unpleasant in old houses, which do exist a lot in Europe.
argosreality - Wednesday, February 2, 2011 - linkInteresting article and I always thought networking over powerlines was pretty logical but this article could use a bit more editing, I think. The first two pages have a quite a few things repeated and sometimes its hard to figure out where we're going with what.
ganeshts - Wednesday, February 2, 2011 - linkThe blurb on the front page and the 'Introduction' section sometimes carry the same information because search engines directly link you to the Introduction section. This is intentional. People arriving via search engines need to get a background on what we are talking about too :)
villageworker - Wednesday, February 2, 2011 - linkAs a tech. installer, mainly in residential setting, I use powerline networking technology to solve networking issues only as a last resort. Reason being its a black box. Powerline either works or doesn't. Any thoughts on how either of these chip guys are addressing the diagnostic tools issue?
blokeuk - Thursday, February 3, 2011 - linkHow this adapters slip thru the FCC net is beyond me, everybody knows that you cant transfer high frequency thru powerline normal cables thats why we have cat5 cat6 cables and so on, these units are wireless units that work on Shortware (HF radio amateurs , airtraffic controllers AM radio) for 100Mb and Shortwave and Ultra Shortwave (HF+VHF FM , TV and so on) for 1Gb so insted using an antenna they use Powerlines to transmit and the reciever is connected to the same antenna eg. the same powerline to receive the transmittion. PLA FDM is so wide it interfere with everything all across the bands.
These are not electrical comunication devices they are radio comunication devices
If you cant install cat cables use normal 2.4Gh wi-fi instead Shortwave Wi-Fi
These frequencies are needed for Fire Truckes Police and emergency services please dont jam.
Thanks in advance and greetings from UK.
PS. Anand should do RF test on these devices when reviewing PLA.
lebarle - Thursday, February 3, 2011 - linkI don't know a lot about it, but I think blokeUK is making a very good point and would like to see what ANANDTECH can find out about it. All of our nifty electronic devices must share this limited spectrum. just looking at the first two videos listed in the blokeUK entry it would seem these powerline devices are VERY noisy and will interfere with my wireless house phones and yes maybe my neighbors police band reciever. If we raise a fuss here maybe the FCC can address this noise source before a lot of these devices get installed.
Per Hansson - Thursday, February 3, 2011 - linkI can confirm your suspicions
I recently bought the Belkin Gigabit Powerline HD networking kit
It managed to do 5Mbps over my powerlines, an apartment built 1990.
When I turned on my FM radio there was an amazing amount of noise in the reception when I was transmitting data, less so when I was not transmitting data but still some pops and cracks in the reception.
When I unplugged the adapter the reception became perfect.
Next test was to run the powerline adapter from the apartment out into my garage, the speed now dropped to 1Mbps...
To my surprise though it managed to even interfere with the FM reception in my car!
The signal got way harder to receive, it did not crack and pop in the audio tho, but I think that may simply be due to the fact that the stereo in my car is much better at receiving a signal, and the fact that the car itself acts like a faraday cage...
To say the least I returned this "Gigabit" junk
epobirs - Thursday, February 3, 2011 - linkThose of us who have actually used powerline technologies know that blokeuk is completely wrong and those videos are nonsense. These devices are regulated by the FCC in the US. You know, the same FCC that also deals with the prospect of broadband over power transmission lines, with far greater potential consequence for RF comms. We simply haven't seen the same problems here because they were largely hammered out in advance.
First of all, it's no great revelation that these are RF devices. It's little different than using coaxial lines in your home to transmit signals originally designed for over the air broadcast to multiple TVs. Guess what? Decades ago, when they started running coax through houses, ham operators took to whining and the FCC took on new responsibilities. A lot of gear on the market long ago is essentially illegal now. Today's spectrum is pretty well managed here. I work with a lot of RF geeks who are involved in emergency services support. None of them has voiced a complaint with powerline equipment sold in this market.
Wi-Fi is not an alternative for many and that number is growing. Wireless is shared spectrum and in many places the spectrum is severely overused. As most ISP are now supplying new customers with Wi-Fi routers there are whole neighborhoods where it has become essentially useless in large patches due to competing overlapping APs. At CES this year the problem was endemic. The head of Nvidia begged audience members during a keynote presentation to shut off the Wi-Fi portion of their phones because it was preventing him from running a demo using wireless. This is a growing problem that isn't getting much attention.
Powerline isn't going to interfere with your cordless phone. These are far more common than Ham gear in households and would quickly put any powerline vendor out of business if that was the case. Ham operators are pretty thin on the ground compared to teenage girls.
As mentioned by another commenter, a far bigger complaint, from an installer's perspective, is knowing how powerline will behave in a particular building. Wiring can vary wildly. In my own condo speeds are fine between nodes on the same floor but drop to a small fraction for a node upstairs trying to talk to one downstairs. Few SOHO IT guys have the electrician's knowledge needed to really say what is going on when they get no signal at all between nodes.