editor's blog
Subscribe Now

Qualcomm Plugs In @ Home

It almost sounds too good to be true. You plug in your new connectable gadget, and not only do you get power, but you’re also connected to high-speed data with no further wires.

People have talked about using home electrical wiring for communicating for a long time, but it doesn’t seem to have gotten much traction – at least not in the US. (Ok, not that I’ve noticed, anyway.) Given the big clunky unshielded wiring, I’ve more or less assumed (without really thinking about it) that they weren’t up to the high-data-rate tasks that we all count on now.

Wrong. Or so say the folks at Qualcomm. Yes, Qualcomm. I know, we think phones and wireless and unplugged with those guys, but their Atheros group has apparently been paying attention to things both wired and plugged. They’ve announced an SoC that supports HomePlug AV2, supplementing existing chips already available. This new QCA7500 gets them above gigabit speeds.

What’s unique about HomePlug is that it can support both narrowband (for Internet of Things) and wideband (for HD video or high-speed internet). The Qualcomm chip supports gigabit data throughout the house; no Cat 5 needed.

What really caught my attention was MIMO. MIMO? Really?? Like, beamforming WiFi sort of thing, with multiple antennae? On… a wire??   O_o

Well, it’s true. But it works only on three-plug systems. Both the live and neutral are used as channels; 2×2 is the only possible configuration. (And it ain’t going to work if your contractor or builder faked out the three-plug thing for the inspector without actually grounding it throughout the house…) SISO is, of course, also supported.

If you have a really big house, you can even use repeaters. Which, of course, would inject a repeated signal in all directions, slightly delayed from the original. Apparently that latency is very low, and doesn’t create an issue for receiving devices trying to capture a clean signal.

When I think of the equipment needed to deploy this technology, I think of stuff that you can go buy at Fry’s to install. And for new construction with clean, grounded wiring, in particular in the US, that’s a possible model. Just like we do with WiFi in our houses.

But there’s another model: the managed one. In this case, your high-speed data carrier actually does the installation and manages the network remotely. This has been done in old houses in Europe (where I would guess the after-the-fact wiring might be sketchier). Qualcomm actually seems more highly focused on this model.

To be clear, they don’t think this will supplant wireless; they see the two working in concert. In fact, it just occurs to me… for folks like me using a cable connection, the wireless router (which is wired to the cable modem, if not outright integrated with it) has to be near the cable connection, which may not be near where you want the signal. So you could run the signals on the power line and have the WiFi router pick it up elsewhere in the house for a stronger signal where you need it. (Why use WiFi when you have HomePlug? Well, for smartphones, for example… they’re not plugged in.)

As to the cost of this technology, they don’t see it as being a huge issue – unless we end up with too much proliferation of interfaces and protocols. If the industry can rally around a few, it should be OK.

You can learn more about Qualcomm’s chip in their release.

Leave a Reply

featured blogs
Mar 26, 2019
It's CDNLive! Well, not today, Tuesday and Wednesday, April 2nd and 3rd at the Santa Clara Convention Center. So I have eight things you can do to get the most out of CDNLive and go home with a... [[ Click on the title to access the full blog on the Cadence Community si...
Mar 25, 2019
Do you ever use the same constraint templates in multiple projects? Now, with PADS Professional VX.2.5, you can easily import and export constraints from one project to the next. Constraint templates enable application of complex rules to multiple nets. They help ensure a smo...
Mar 22, 2019
In the video above, it might not appear that much is taking place, but just like with transformers there is “more than meets the eye.” Alright, that was corny, and I am mildly ashamed, but Nanosecond Event Detection for shock and vibration is nothing to be ashamed...
Jan 25, 2019
Let'€™s face it: We'€™re addicted to SRAM. It'€™s big, it'€™s power-hungry, but it'€™s fast. And no matter how much we complain about it, we still use it. Because we don'€™t have anything better in the mainstream yet. We'€™ve looked at attempts to improve conven...