On Wednesday, the Office of Engineering and Technology (OET) within the U.S. Federal Communications announced the authorization of unlicensed wireless (a/k/a LTE-U) devices to operate in the 5 GHz band:
"This action follows a collaborative industry process to ensure LTE-U with Wi-Fi and other unlicensed devices operating in the 5 GHz band. The Commission’s provisions for unlicensed devices are designed to prevent harmful interference to radio communications services and stipulate that these devices must accept any harmful interference they receive. Industry has developed various standards within the framework of these rules such as Wi-Fi, Bluetooth and Zigbee that are designed to coexist in shared spectrum. These and other unlicensed technologies have been deployed extensively and are used by consumers and industry for a wide variety of applications.
LTE-U is a specification that was developed and supported by a group of companies within the LTE-U Forum... The LTE-U devices that were certified today have been tested to show they meet all of the FCC’s rules. We understand that the LTE-U devices were evaluated successfully under the co-existence test plan. However, this is not an FCC requirement and similar to conformity testing for private sector standards the co-existence test results are not included in the FCC’s equipment certification records."
ComputerWorld explained in 2015 the strain on existing wireless capabilities and why several technology companies pursued the technology:
"According to the wireless providers and Qualcomm, the technology will make use of the existing unlicensed spectrum most commonly used for Wi-Fi. LTE-U is designed to deliver a similar capability as Wi-Fi, namely short-range connectivity to mobile devices.
As billions of mobile devices and Web video continue to strain wireless networks and existing spectrum allocations, the mobile ecosphere is looking for good sources of spectrum. The crunch is significant, and tangible solutions take a long time to develop... as former FCC Chairman Julius Genachowski and FCC Commissioner Robert McDowell recently remarked, “mobile data traffic in the U.S. will grow sevenfold between 2014 and 2019” while “wearable and connected devices in the U.S. will double” in that same period."
Some cable companies, such as Comcast, opposed LTE-U based upon concerns about the technology conflicting with existing home WiFi. According to Computerworld:
"In real-world tests so far, LTE-U delivers better performance than Wi-Fi, doesn’t degrade nearby Wi-Fi performance and may in fact improve the performance of nearby Wi-Fi networks."
"LTE-U allows wireless providers to deliver mobile data traffic using unlicensed spectrum while sharing the road, so to speak, with Wi-Fi. The excellent staff of the FCC’s Office of Engineering and Technology has certified that the LTE-U devices being approved today are in compliance with FCC rules. And voluntary industry testing has demonstrated that both these devices and Wi-Fi operations can co-exist in the 5 GHz band. This heralds a technical breakthrough in the many shared uses of this spectrum.
This is a great deal for wireless consumers, too. It means they get to enjoy the best of both worlds: a more robust, seamless experience when their devices are using cellular networks and the continued enjoyment of Wi-Fi, one of the most creative uses of spectrum in history..."