Tag Archive for AirGig

Will 5G Save Broadband Over Power Line?

Will 5G Save Broadband Over Power Lines?5G could resurrect broadband over powerline (BPL). At least that is the hope of AT&T (T). For those who don’t remember the heady rise of BPL, it grew out of an attempt to use the existing electrical grid to deliver broadband everywhere without having to build infrastructure anywhere. A few broadband over power line systems with paying customers got off the ground but they were all gone by the end of 2010.

ATT logoAT&T started testing BPL renamed Project AirGig in 2016. And now in 2019 FierceWireless is reporting AT&T is planning more trials of AirGig that will involve 5G. The telecom behemoth is also working with vendors and technology partners to build commercial-grade 5G equipment for those trials.

Hank Kafka, vice president of access architecture and standards at AT&T, told FierceWireless the company isn’t ready to offer details but said Project AirGig is making progress and it will be a very complementary technology to 5G. He told the author that “5G is very high on that list.”

Specifically, AirGig could be used to extend 5G millimeter wave (mmWave) signals beyond their current range. The article says AT&T has launched a mobile 5G service in 19 markets so far using mmWave spectrum, but using that spectrum has drawbacks because it has a limited range compared to lower spectrum bands.

Air5G small cellGig technology includes a radio distributed antenna system (RDAS) and mmWave surface wave launcher. The RDAS reconstructs signals for multigigabit mobile and fixed deployments. The mmWave surface wave launchers can power themselves using inductive power devices without an electrical connection. These devices then create a high-speed signal that travels along or near the wire, providing a broadband connection.

I covered AT&T’s 2018 AirGig trial here. In that trial with Georgia Power Company, the telco used LTE as the transport technology.  Mr. Kafka explained that in 2018 suitable 5G equipment was not available. “At the time of the trial 5G equipment was large and bulky,” he said. Now that 5G is commercially deployed in some markets AT&T is working with vendors to get the right type of gear for the new trials.

Not only could AirGig potentially extend the reach of 5G, but it could also be used as a backhaul technology. “If you set up an architecture where AirGig is connecting to 5G radios, it is acting like backhaul … And you can get gigabit speeds and beyond.”

5G backhaulHe also said that commercialized AirGig would be a good fit for small cells because of the way it is architected. In other words, a wireless signal could travel down the power line and handoff to small cells or be used to backhaul wireless traffic from small cells. This could be profitable for carriers who are getting resistance from municipalities over the siting of their small cells for 5G. AirGig might allow small cells to be co-located with utility infrastructure.

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Apparently, AT&T doesn’t have plans to commercially deploy AirGig in the near term, but it has rolled out 5G service in 19 U.S. cities that could benefit from the goals of the BPL AirGig experiment including:

  • CA: Los Angeles, San Diego, San Francisco, San Jose
  • 5G cell phone userFL: Jacksonville, Orlando
  • GA: Atlanta
  • IN: Indianapolis
  • KY: Louisville
  • LA: New Orleans
  • NC: Charlotte, Raleigh
  • OK: Oklahoma City
  • TN: Nashville
  • TX: Austin, Dallas, Houston, San Antonio, Waco

Maybe AirGig is on the slow track because there aren’t any smartphones that can use it yet. The Verge points out that AT&T’s only available true 5G device is a mobile hotspot that can’t be purchased in stores.

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Ralph Bach has been in IT long enough to know better and has blogged from his Bach Seat about IT, careers, and anything else that catches his attention since 2005. You can follow him on LinkedInFacebook, and Twitter. Email the Bach Seat here.

AT&T Tries Broadband over Powerline

AT&T Tries Broadband over PowerlineIt’s alive. It’s alive! BPL has risen from dead. Longtime readers of the Bach Seat, know the history of Broadband over Powerline. I covered it many years ago here, here, and here. Imagine my surprise when there were a number of articles popping up all over the interwebs touting mega-telecom AT&T’s (T) try at BPL 10 years after everybody else gave up on the technology.

Broadband over PowerlineComputerWorld described this latest incarnation of BPL from AT&T as a low-cost, high-speed wireless internet technology. This time Broadband over Powerline relies on plastic antennas positioned along medium-voltage power lines and not through the conductive materials inside the power lines. FierceTelecom says that AT&T will attach the plastic antennas to the power lines and serve as a mesh network to distribute signals to homes and businesses. The Project AirGig low-cost plastic antennas and devices will regenerate millimeter wave (mmWave) signals. Millimeter-wave technology relies on electromagnetic waves that are longer than x-rays but shorter than radio waves (they are found in the 10 mm to 1 mm range and are also known as extremely high-frequency waves according to New Atlas. The EHF waves can be used for 4G LTE and 5G multi-gigabit mobile and fixed deployments.

John Donovan, chief strategy officer and group president of AT&T technology and operations, told FierceTelecom that Project AirGig delivers last-mile access without any new FTTH technology and is flexible enough to be configured with small cells or distributed antenna systems.

Broadband over PowerlineTo test the technology, AT&T is looking for a place somewhere in the next year with a favorable regulatory environment, since the carrier would need to partner with an existing electric utility. John Donovan, chief strategy officer for AT&T said the trial could be in an area where existing broadband is expensive, even in the U.S.

The AirGig project relies on over 100 patents, according to an AT&T statement. There is no direct electrical connection to the power lines, although network components could receive their needed power through inductive wireless electricity from the near by power lines, AT&T Chief Technology Officer Andre Fuetsch explained to Computerworld.

ATT logoAT&T said the testing will decide what frequency AirGig will use for commercial deployment, which could occur sometime around 2020 after the carrier rolls out 5G wireless. The frequency AT&T uses will affect the range of the signal and the speed, as well as whether it is over a licensed or unlicensed band. This decision is important if AT&T plans to use BPL as another weapon in its fight with Google Fiber. Earlier versions of Broadband over Powerline were incapable of delivering the Google (GOOG) promised Gigabit of Internet access.

“It’s a transformative technology that delivers low-cost and multi-gigabit speeds using power lines,” AT&T’s Donovan said, “There’s no need for enhancements for new towers, and it’s over existing infrastructure.”

Google (GOOG) promised Gigabit of Internet accessAirGig has already been tested in outdoor locations on-campus settings. “We’ve had it up and running 4k video and cameras on campuses for quite some time,” Mr. Donovan said.

Besides using the AirGig technology as an alternative broadband service delivery option, for urban, rural, and under-served markets AT&T wants to convince the electrical utility industry to apply AirGig technology to their unique needs. ComputerWorld says utility companies would be able to use the technology to help spot problems on their power lines from something like a downed tree or cracks in the cable sheath.

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New Atlas points out that earlier this year, a millimeter-wave technology system set a new world record for wireless data transmission by sending data at 6 Gbps. The technology is also showing up in other applications, including heart-rate monitors, car-safety systems, and luggage scanners.

AirGig could be profitable for AT&T. If they can make a deal with an electrical company, they can avoid expensive make ready. Which Google Fiber is struggling mightily with. By using power lines, AirGig avoids the cost of digging trenches to lay fiber optic cable.

Still, questions remain about how this version of Broadband over Powerline will do in the real world.

  • What impact will heavy rain, snow or ice have on the signal?
  • What if a tree branch falls on a power line or the lines are swinging in the wind?
  • Since mmWave transmissions need a direct line-of-sight between antennae, what happens when critters like birds or squirrels decide to perch on the antennae? Will that lead to an outage?

The ham radio lobby will likely be up in arms again when they find AT&T still likes the idea of BPL in the 30-300 GHz bands. The ARRL was a key player in killing BPL 1.0.

 

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Ralph Bach has been in IT long enough to know better and has blogged from his Bach Seat about IT, careers, and anything else that catches his attention since 2005. You can follow him on LinkedInFacebook, and Twitter. Email the Bach Seat here.