With billions of dollars in new revenue and royalties to be made, Qualcomm and some members of the wireless industry are pushing regulators to quickly approve a new version of LTE wireless technology that will share many of the same frequencies used by home and business Wi-Fi networks, creating the potential for speed-killing interference.

Wireless operators believe LTE-Unlicensed (LTE-U) could be used to offload much of the growing wireless data traffic off traditional 4G LTE wireless data networks. With the cost of securing more wireless spectrum from regulators growing, LTE-U technology would allow operators like AT&T, Verizon, Sprint and T-Mobile to use the U-NII-1 (5150-5250MHz) and U-NII-3 (5725-5850MHz) unlicensed bands currently used for Wi-Fi to deliver high-speed wireless broadband traffic to their customers.

Qualcomm and Ericsson, behind the newest iteration of LTE, have a vested interest promoting it as the ideal choice for metrocell, indoor enterprise, and residential small cell applications. Every manufacturer incorporating LTE-U technology into everything from carrier-owned microcells to smartphones will owe royalty payments to both companies. With billions at stake, Qualcomm is doing everything possible to tamp down fears LTE-U signals will create harmful interference to Wi-Fi signals.

[flv]http://www.phillipdampier.com/video/CES2015 Qualcomm Demonstrates LTE-U 1-2015.mp4[/flv]

At the Consumer Electronics Show in Las Vegas held in January, a Qualcomm representative went as far as suggesting LTE-U will improve home Wi-Fi service. (5:42)

RCRWireless News:

[Qualcomm] set up a screened room with eight pairs of access points occupying the same channel and added Wi-Fi access-point terminals in one room and LTE-U terminals in another. The results show the average throughput of 3.3Mbps with Wi-Fi alone more than doubled to 6.7Mbps when the LTE-U access point was introduced.

In another test to show that LTE-U is a better neighbor to Wi-Fi than Wi-Fi itself, they took eight Wi-Fi nodes and replaced four of them with LTE-U nodes, the result of which showed a 1.9Mbps increase in average Wi-Fi throughput. In almost every test, the LTE-U enhanced network outperformed traditional Wi-Fi.

Burstein

Industry observer Dave Burstein is concerned advocates of LTE-U are trying to rush approval of the technology without verifying Qualcomm’s non-interference claims.

“The telcos are considering 40 and 80MHz channels that could easily swallow half of more of the Wi-Fi spectrum,” Burstein writes in response to an EE Times article about the technology. “If Wi-Fi is important, that’s a mistake to allow. Advocates are trying to rush it through even though there is not a single independent test or field trial.”

Qualcomm dismisses the interference complaints pointing to its own research showing the two standards can co-exist adequately. But multi-billion dollar wireless companies with nationwide Wi-Fi networks at stake are far less confident. In fact, LTE-U has already divided the two largest wireless carriers in the United States. Verizon Wireless is an original proponent of LTE-U while AT&T has expressed “concern,” a polite way of saying it isn’t happy. What separates AT&T and Verizon Wireless? AT&T has invested in a nationwide network of more than 34,000 Wi-Fi hotspots. Verizon offers just over 5,000, most for FiOS customers or those in especially high traffic venues.

A Stanford University professor with no ties to Qualcomm or the wireless industry privately shared his belief allowing 5GHz Wi-Fi signals to commingle with LTE-U is going to cause problems.

The development of “Wild West” Wi-Fi has always tracked differently than the licensed cellular/wireless business. Over more than a decade, evolving Wi-Fi standards have come to expect interference from other nearby Wi-Fi signals. In a densely packed city, more than two dozen Wi-Fi signals can easily be found all competing for their own space across the old 2.4GHz and newer 5GHz unlicensed bands.

Wi-Fi proponents credit its robustness to its “politeness protocol.” Before a wireless router or home hotspot fires up its Wi-Fi signal, it performs several tests to check for other users and constantly adjusts performance by backing off when it discovers interference from other signals. That is why a user can receive strong Wi-Fi signals but still endure reduced performance, as the hotspot accommodates nearby hotspots and other traffic.

It works reasonably well, according to Rupert Baines, a consultant at Real Wireless.

“But [Wi-Fi signals] are delicate, and they rely on implicit assumptions that there aren’t other things there (or aren’t too many),” Baines told EE Times. “In effect, they behave as though the unlicensed band were not technology neutral but were Wi-Fi only.”

The intrusion of LTE-U changes everything.

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On the March 24, 2015 episode of Tuesdays with Roger, Recon Analytics’ founder Roger Entner talks with Wireless Week about the questions raised as major carriers, including T-Mobile and Verizon Wireless, plan to launch LTE into unlicensed territory. Concerns abound, particularly for consumers and companies who rely on Wi-Fi and don’t want licensed use in unlicensed bands to interrupt that service. (7:31)

Change in and of itself is not necessarily a bad thing, especially if LTE-U is superior to Wi-Fi, and some proponents suggest it is. Jag Bolaria, an analyst at The Linley Group, argues LTE better manages data/call handoff better than Wi-Fi access points can. LTE is also a more efficient spectrum user than Wi-Fi.

Last week, South Korea’s LG U+ demonstrated LTE-U was capable of 600Mbps speed, eight times faster than traditional LTE. But to accomplish that level of speed, LG U+ had to occupy 60MHz of bandwidth in the 5.8GHz band and allocate an extra 20MHz from its traditional LTE service. The company plans to further expand its use of South Korea’s 5.8GHz unlicensed band by occupying 80MHz of it to further boost speeds to 750Mbps. But the company did not say how the tests affected others sharing the same frequencies.

If LTE-U is superior, then why not gradually move every user towards the technology and away from Wi-Fi?

Aptilo Networks AB CEO Torbjorn Ward answers LTE-U is a solution in search of a problem.

“I think LTE on unlicensed sounds like a good idea if it wasn’t for the fact that there are four billion devices on Wi-Fi out there,” he told Light Reading, noting that 802.11ac can already run at 100Mbps, so there’s little need for the LTE boost. “I think when it comes to unlicensed, you can do a longer range with LTE, but I don’t see the full benefit.”

That does not seem to matter to LTE-U’s developers or cell phone companies that lack robust Wi-Fi networks of their own.

In the original Qualcomm/Ericsson proposal, both companies promote the fact they could launch LTE-U in the unlicensed Wi-Fi bands “as-is.” That is a big problem for AT&T and other Wi-Fi users because LTE-U evidently employs few, if any protection protocols in its initial specifications for other traffic. Verizon Wireless is reportedly lobbying against the development of interference protection protocols and has publicly asserted its interest in deploying LTE-U regardless of other users.

“In [the] USA, there are no requirements for unlicensed deployment that require changes to LTE air interface,” Verizon stated in its proposal: “New Band for LTE deployment as Supplemental Downlink in unlicensed 5.8GHz in USA.”

LTE-Unlicensed has been characterized as “rude” for not avoiding interference to other users.

Clint W. Brown, business development director of mobility wireless connectivity at Broadcom, and a vice-chairman of the Wi-Fi Alliance counters it is premature to approve LTE-U in the unlicensed Wi-Fi band without more testing and information about its interference protocols.

“We’ve heard about the tests they’ve done, but it’s not factual,” Brown told EE Times. We haven’t seen the data and we don’t know how the tests were set up. First, I’d like to see if [LTE-U] can detect low-level signals. Second, I want to make sure it features a ‘Listen before Talk’ decision process so that LTE-U will wait for an opening rather than barging into the conversation already taking place in the unlicensed spectrum. Third, there should be a back-off mechanism, when it sees a collision. “We aren’t aware of any publicly available documents explicitly stating those attributes.”

The Federal Communications Commission has also now taken an interest and issued a public notice asking stakeholders and consumers to share their thoughts on LTE-U and a companion technology known as Licensed Assisted Access (LAA) that would hand off data sessions between a wireless carrier’s traditional 4G LTE network and LTE-U.

The makes the discussion political as well as technical. The FCC traditionally permits industry groups to define standards, but Republican Commissioner Mike O’Rielly now worries the FCC might butt into that process.

“The decision to jump into this space rather casually causes me great concern,” O’Rielly said. “In particular, any step that could insert the commission into the standards work for LTE-U comes with great risk. I will be vigilant in ensuring that the commission’s involvement does not result in taking sides with various stakeholders, hindering technological innovation, or having any say about what technologies should or should not be deployed.”

For the moment, O’Rielly’s concerns about the FCC are premature as long as a division exists over LTE-U among many of the industry players:

• Companies FOR LTE-U: Verizon, China Mobile, Qualcomm, Ericsson, NTT DoCoMo, T-Mobile USA, Deutsche Telekom, TeliaSonera, and China Unicom.  Equipment manufacturers also in support: Nokia, NSN, Alcatel-Lucent, LG, Huawei, ZTE, Hitachi, Panasonic, and others;
• Companies AGAINST LTE-U (as now defined): Orange, Telefónica, Vodafone, AT&T, Sprint, SouthernLINC, US Cellular, DISH and a handful of vendors.

Burstein also uncovered evidence the wireless industry may be stacking the deck against increased competition and consumers. He found 11 of the world’s largest wireless companies (including AT&T, T-Mobile, and Sprint) quietly colluding on a proposal that would block anyone other than currently licensed LTE users from being able to use LTE-U on a standalone basis. The opaquely-titled proposal, “Precluding standalone access of LTE on unlicensed carriers,” is at least frank about its reasoning: “Standalone deployment in unlicensed spectrum implies drastically different business models from nowadays and might impact the value chain.”

In other words, if consumers are able to get savings from LTE-U using a new generation of non-traditional providers like Republic Wireless or Cablevision’s Freewheel that do not depend primarily on cellular networks, it could cost those 11 traditional wireless companies billions in lost revenue. To stop that, the companies propose requiring a special LAA “guard signal” to stop standalone access of LTE-U. Since only licensed cell phone companies have access to those frequencies, it automatically locks out new upstarts that lack mobile spectrum of their own.

Sneaky insertions like that may be exactly why the Obama Administration’s FCC is being more activist about monitoring the wireless industry, potentially cutting off anti-competitive proposals before they can become adopted as part of a formal technical standard.

[flv]http://www.phillipdampier.com/video/Fairness to Wi-Fi and LTE unlicensed 5-8-2015.mp4[/flv]

RCRWireless News gets deep into the development of LTE-Unlicensed and how it will impact cellular infrastructure, Wi-Fi and small cells. (25:39)

A Verizon executive told investors there is no wireless spectrum shortage in the United States and Verizon has historically purchased and warehoused spectrum it had no intention of using immediately.

Fran Shammo, chief financial officer of Verizon Communications, drew attention to Verizon’s controversial spectrum acquisition policy as part of a conversation with investors about the recent FCC auction that sold 65 megahertz of wireless frequencies for an unprecedented $44.9 billion, far and away the highest ever seen in a spectrum auction.

“In every purchase of spectrum up to this auction, the scale was that it was more efficient to buy spectrum than it was to build capacity because the scale was spectrum was cheaper to build on capacity,” Shammo said.

Before the auction, there were significant differences in Verizon Wireless’ network capacity in different cities. In New York City, Verizon controls 127MHz. In Los Angeles and San Francisco it manages with 107MHz, but only has 97MHz to work with in Philadelphia, San Diego and Chicago.

Verizon Wireless has always held spectrum it acquired at auction but never put into widespread use on its network. But bidding during the FCC’s most recent Auction 97 made bidding and warehousing unused frequencies an expensive proposition, more expensive than beefing up Verizon’s existing network with additional cell towers, microcells, and other technology to make the most use of existing spectrum assets.

“This auction flipped [our acquisition] equation in certain markets,” Shammo said in reference to Verizon’s bidding strategy. “And so we became much more diligent on what markets we strategically wanted and [which] we were willing to let go because when you looked at it, if I was to get what I wanted initially when I went in, I would have spent an extra $6 billion when I could create the same capacity with $1.5 billion by building it.”

In the most recent auction, Verizon Wireless considered spectrum acquisitions crucial in California, where it added frequencies in Los Angeles, San Diego and San Francisco. But Verizon gave up bidding on spectrum for densely populated New York and Boston where the asking price grew too high. That forces Verizon Wireless to increase the efficiency of its existing network in those cities. It will do so by deploying more cell towers to divide the traffic load, as well as adding microcells and other small-area solutions in high traffic urban areas.

Despite not getting everything it wanted, Verizon took the auction results in stride, claiming its network was fully capable of handling growing traffic loads even in areas where it failed to win new spectrum.

“People think that spectrum is the Holy Grail and if you don’t have enough spectrum, you can’t have the capacity,” Shammo said. “But actually that’s not true now because technology has changed so much. If you look at small cell technology, diversified antenna systems, and when you think [about] Chicago, if you walk down the street, you see small cells on lamp posts. So, the municipalities are starting to open up to that small cell technology.”

AT&T paid $18.2 billion for nearly 250 licenses, compared with $10.4 billion Verizon will spend on 181 licenses. The presence of Dish Networks in the bidding clearly irritated AT&T and Verizon, primarily because the satellite dish provider incorporated two “designated entities” — SNR Wireless LicenseCo and Northstar Wireless — as bidding partners, winning up to 25% off their bids as part of a “small business discount.” The two DEs won over $13 billion in licenses with $3 billion in savings.

AT&T accused Dish of circumventing auction activity rules and distorting the bidding.

“As a result, Dish the corporate entity won no licenses,” said Joan Marsh, AT&T’s vice president of federal regulatory matters. “The Dish DEs, who each enjoyed a 25% discount, won substantial allocations.”

Marsh complained Dish already controls around 81MHz of spectrum that remains unused for wireless telecom services.

Dish also made life difficult for large carriers who have learned to predict the likely bidding strategies of their competitors based on experience. Many were surprised Dish managed to both bid up prices and win a substantial percentage of spectrum, all for a wireless business it has yet to build.

T-Mobile was not happy either. CEO John Legere called the auction “a disaster for American wireless consumers.” T-Mobile suffered considerably in the auction, outspent by Dish & Friends 132 times for important wireless licenses.

“Three companies alone spent an insane $42 billion between them, grabbing a ridiculous 94 percent of the spectrum sold at this auction,” Legere wrote, referring to AT&T, Dish Network and Verizon Wireless. “This whole thing should scare the hell out of you and every other wireless consumer in the U.S., because there is another important auction next year, and the results have to be different if wireless competition is going to survive.”

With the auction over, Verizon Wireless will continue to shift its spectrum usage around to accommodate network changes. Verizon will continue to emphasize enlarging 4G LTE services while gradually reducing the percentage of its network used for other purposes. Verizon expects to shut off its CDMA voice network in the early 2020s and is reducing the amount of spectrum dedicated to supporting its legacy 3G network.

Is a cell tower coming to your neighbor’s backyard?

Amended language in a bill that would expand broadband service to rural Iowa strips local communities from regulating where wireless companies can place their cell towers, potentially threatening its passage.

The “killer” amended language originated from wireless phone company lobbyists, most likely working for AT&T, and suddenly appeared in the Iowa House version of the bill.

AT&T has routinely proposed such language in several states, claiming the new regulations are designed to “streamline” the expansion of cellular networks often held up by ‘spurious objections’ from local citizens opposed to the unsightly towers in their immediate neighborhoods.

Local governments have also regularly weighed in on approving cell towers in areas where they pose an aesthetic threat or a potential safety risk and some, according to AT&T, have interminably delayed consideration of cell site proposals.

The language in the House bill introduces time limits on cell tower approvals, prohibits communities from rejecting tower placement except under limited circumstances, and denies communities access to cell site documentation deemed private, competitive information by wireless companies.

(Unless you want to put a cell tower here)

The cell tower language is included in the House version of the Connect Every Iowan Act, legislation considered a priority by Gov. Terry Branstad this year. Branstad wants to remove financial and regulatory impediments and offer tax credits to stimulate expansion of broadband into areas most providers have previously deemed uneconomical to serve.

AT&T sees wireless broadband as a sensible alternative and the company has publicly advocated using wireless 4G technology in rural areas. If the House measure is approved, AT&T and other wireless companies can affix microcells or other cellular antennas to utility poles, street signs, or water towers without seeking permission from local authorities.

Colleagues in the Iowa state Senate were concerned about the language in the House version of the bill.

“The language in the House bill, in my view, is pretty egregious,” Sen. Steve Sodders, (D-State Center), who is leading the effort on the Senate bill. He told the Associated Press, “It really took away all local control of cell tower siting.”

“The real angst there is that without local control on these towers, these things can be built right in your neighborhood,” said Sen. Matt McCoy, (D-Des Moines). “Nobody wants to come home and see that. Finding that balance is going to be key.”

Des Moines city attorney Jeff Lester noted the language in the bill cleverly favors cellular companies with a built-in guarantee of approval of their cell tower requests:

The bill does not require cellular companies to provide company and business plan information to local governments when applying for a new cell tower site. Should municipal authorities deny a request, and a cellular company then brings the case to federal court, local authorities wouldn’t have the evidence necessary to justify their denial.

Lester said under federal law, company information serves as evidence in these appeals. Without it, there is no basis for denial, he said, and the ruling would be in favor of the cellular company.

Rep. Peter Cownie, (R-West Des Moines), who spearheaded the effort in the House, said determining where towers can or cannot go is a difficult task, but that it’s not his intent to weaken anyone’s say in their placement.

“I do not want to take away the authority of local officials in terms of cell tower siting,” he told AP. “I don’t think anyone’s goal is to take that away.”

Subcommittees in both chambers plan to meet to discuss the legislation next week.

A Samsung femtocell offered by Verizon Wireless.

The wireless industry’s push to offload wireless traffic to microcells and other short-range femtocell base stations has opened the door for hackers to intercept voice calls, SMS text messages and collect enough identifying information to clone your phone.

Researchers from iSec Partners demonstrated femtocell vulnerability last month at the Black Hat conference in Las Vegas, successfully recording phone calls, messages, and even certain web traffic using a compromised $250 Samsung “network extender” sold to consumers by Verizon Wireless.

Once anyone gets within 15-20 feet of a femtocell using compatible network technology (CDMA or GSM), their device will automatically attempt to connect and stay connected to a potentially rogue cell signal repeater as long as the person remains within 50 feet of the base station. Many phone owners will never know their phone has been compromised.

“Your phone will associate to a femtocell without your knowledge,” said Doug DePerry from iSEC Partners. “This is not like joining a Wi-Fi network. You don’t have a choice. You might be connected to ours right now.”

During the demonstration, the presenters were able to record both sides of phone conversations and compromise the security of Apple’s iMessage service. All that was required was to trick Apple’s encrypted messaging service to default to exchanging messages by plain text SMS. Phones were also successfully cloned by capturing device ID numbers over Verizon’s cell network. Once cloned, when the cloned phone and the original are connected to a femtocell of any kind, at any location, the cloned unit can run up a customer’s phone, text, and data bill.

“Eavesdropping was cool and everything, but impersonation is even cooler,” DePerry said.

Although the very limited range of femtocells make them less useful to track a particular person’s cell phone over any significant distance, installing a compromised femtocell base station in a high traffic area like a restaurant, mall, or entertainment venue could allow hackers to quietly accumulate a large database of phone ID numbers as people pass in and out of range. Those ID numbers could be used to eventually clone a large number of phones.

iSEC Partners believe femtocells, as designed, are a bad idea and major security risk. Although Verizon has since patched the vulnerability discovered by the security group, DePerry believes other vulnerabilities will eventually be found. He worries future exploits could be used to activate networks of compromised femtocells controlled by unknown third parties used to snoop and steal from a larger user base.

iSEC says network operators should drop femtocells completely and depend on implementing security at the network level, not on individual devices like phones and cell phone extenders.

AT&T’s femtocells support an extra layer of security, so they are now unaffected by hacking. But that could change eventually.

“It’d be easy to think this is all about Verizon,” said Tom Ritter, principal security engineer at iSec Partners. “But this really is about everybody. Remember, there are 30 carriers worldwide who have femtocells, and [that includes] three of the four U.S. carriers.”

iSec Partners is working on “Femtocatch,” a free tool that will allow security-conscious users to automatically switch wireless devices to “airplane mode” if they ever attempt to connect to a femtocell. The app should be available by the end of August.

AT&T 3G MicroCell

One of the core principles of Net Neutrality is that all Internet traffic is treated equally — nothing favored, nothing penalized.

AT&T does not seem interested in following that principle, as our regular reader James found out when reviewing the terms and conditions of AT&T’s Internet Overcharging scheme that limits DSL customers to 150GB of usage per month and 250GB for U-verse customers.

AT&T Wireless customers with the company’s 3G MicroCell that covers for AT&T’s network shortcomings are given special treatment if they also subscribe to the company’s wired broadband services: use of the MicroCell is exempt from the wired usage cap.

The MicroCell creates a mini “cell-tower” within the home for wireless devices that do not receive adequate indoor reception, powered by your home or office broadband connection. Customers with smartphones or other wireless devices can use the MicroCell to browse web pages, use apps, make and receive calls, or send and receive text messages without ever worrying about exceeding their DSL or U-verse broadband usage allowance. Want to access that content on your home computer? That does count against your cap.

“So data from another AT&T service which is sent over the same Internet connection as any other data traffic is excluded from the cap?  That sounds like a clear Net Neutrality violation to me,” says James.

From AT&T’s own FAQ:

“I have an AT&T 3G MicroCell. Since that utilizes my home broadband network to boost my wireless data signal, does that mean my wireless usage also counts against my wired broadband monthly data plan?

No, the wireless traffic from your AT&T 3G MicroCell does not count toward your monthly home broadband plan. Please register your AT&T 3G MicroCell account and your residential AT&T Internet account at www.att.com/internet-usage-MicroCell to help ensure accurate Internet usage billing. If you have broadband service with another provider, you do not need to register your account.”

The usage cap “free pass” does not extend to your wireless service plan, however. Despite using your home broadband connection, the use of the MicroCell still consumes monthly plan minutes and megabytes, unless you purchase extra add-ons. AT&T would argue it already charged you for your wireless usage, so it would not be fair to charge you again through your home broadband plan. But if you are not an AT&T broadband customer, that is exactly what happens if your local cable operator also has usage billing.

AT&T’s logic for implementing usage caps in the first place:

AT&T has experienced a dramatic increase in the amount of data that is sent and received over its wireline broadband networks. This dramatic increase is driven primarily by a small fraction of our customers. In fact, the top 2% of customers use about 20% of the total capacity on our network. A single high-traffic user can utilize the same amount of data capacity as 19 typical households. Lopsided usage patterns can cause congestion at certain points in the network, which can slow Internet speeds and interfere with other customers’ access to and use of the network.

Customers that blow through their allowance receive one warning and then a higher bill: a $10 overlimit penalty will apply and extends your usage allowance by 50GB. AT&T’s cost per gigabyte is estimated to be in the pennies.