FCC Examines Shortcomings in E911 Calls’ Location Data
New rules sought to automatically communicate location of indoor emergencies.
Substantially decline in percentage of calls with location data
November 15, 2013
Prompted by reports of a sharp deterioration in the quantity and quality of 911-caller automatic location information, the Federal Communications Commission (FCC) is weighing new requirements for phone companies to help emergency personnel find cell phone users in need of aid.
Data from emergency providers show that a rapidly declining number of 911 calls from mobile phone users come in without the accurate location information needed to find the person calling for help.
According to CALNENA, the California chapter of the National Emergency Number Association, AT&T was able in 2008 to provide such automatic location information for 92 percent of the emergency calls received in the California jurisdictions of Bakersfield, Pasadena, San Francisco, San Jose, and Ventura County by the end of the call. By 2012 that had dropped to 31 percent. T-Mobile’s rate fell from 47 to 19 percent for the same period though Sprint, Metro and Verizon improved their provision of location information. (See accompanying figure from CALNENA report.) Even so less than half of the 1,589,580 wireless 911 calls made statewide in March 2103 included location information, according to CALNENA.
“This problem appears to be happening in all areas of the state,” wrote Danita Crombach, president of CALNENA, in an August letter to the FCC and a more than half a dozen members of Congress “but the problems seem more pronounced in urban areas, possibly suggesting that whatever 9-1-1 technologies the wireless carriers may be using lately are not working for wireless calls placed in or near high-rise buildings.”
The FCC had taken up the issue. The National Emergency Number Association, the wireless carriers and a number of location-data providers will speak at an FCC workshop on E911 (Enhanced 911) location accuracy on November 18 at FCC headquarters in Washington.
Over-Reliance on GPS?
“The best way to do location accuracy for 911 indoors and outdoors is a hybrid system — one that uses triangulation with GPS,” said Barnett. “The problem is that some of the carriers have moved away from the hybrid system, from using more than one thing. They use just GPS. GPS is great as long as you have an unobstructed view of the satellite. But unfortunately . . . you can’t arrange your emergencies to make sure you have an unobstructed view of the satellite.”
If a carrier is using GPS only, or an assisted GPS that doesn't work, it drops back to a technology that is much less accurate and that's where some of the problems are coming up, Barnett said.
“It really doesn't help the 911 center if you say, ‘Well the person who's calling 911 is somewhere within this mile radius,’” Barnett told Inside GNSS. Even worse, he said, “sometimes it will tell them that they are in this smaller radius — and that will be wrong. Sometimes these backup technologies when the GPS is not available will give a misleading location.”
The problems are being compounded by the fact that more and more calls are being made from cell phones, and a greater percentage of those calls are being made from indoors where GPS satellite signals cannot easily penetrate.
Seventy percent of the 240 million 911 calls each year are wireless, said Barnett, who is also with the law firm Venable — which is representing TruePosition, a potential supplier of indoor location data and, according to an August FCC filing, a member of the FindMe911 Coalition. “Fifty-six percent of all telephone calls are made indoors, he added, citing data from the market research company J.D. Powers. “So this is big for our elderly population, for people who are disabled, and really just the way we communicate now.”
The phone companies, however, do not have requirements for providing location data for indoor calls as they do for calls made out of doors, said Barnett, who is also with the law firm Venable. Venable is representing TruePosition, a potential supplier of indoor location data and, according to an August FCC filing, a member of the FindMe911 Coalition. TruePosition provided the initial funding for FindMe911, said Barnett.
CTIA — The Wireless Association, the industry group for wireless carriers, said it shares the goal of “reliable and accurate indoor solutions.” More testing is needed, however, to determine what technology is appropriate to solve the problem, it wrote in comments to the FCC submitted September 25.
CTIA pointed out that CSRIC III E9-1-1 Location Accuracy Working Group 3, which has been studying indoor location technology at the request of the FCC found “a lack of independently verifiable data on location technology performance . . . for indoor environments.”
That report, CTIA quoted in its comments, “concluded that, ‘to be of any real value in providing the FCC and the industry as a whole with the information necessary to assist with informed decision making,” a test bed study would be necessary.’” The working group proposed a two-stage approach: an evaluation of existing technologies by March 2013, and an assessment of emerging technologies as they mature and become available, said CTIA.
“They would certainly say that wouldn't they,” said Barnett when asked by Inside GNSS about the need for testing. “If you actually read the reports, what they show is that (the available technologies) fit within the criteria.”
CTIA declined a request by Inside GNSS to comment for this article.
In separate filings the wireless association and carriers defended their technology and took issue with the data provided by CALNENA, asserting that the call center staff may not be sufficiently querying for the location information. CTIA said the CALNENA data reflected “initial bids,” that is queries for location at the beginning of the call when full data may not be available. Those handling the calls need to “re-bid” or request an update for the information. Rebidding gives a cell network time to determine a caller’s location and deliver it, as required, within 30 seconds.
CTIA underscored that its members provide location as required by the FCC, and the agency rules do not mandate that the carriers “push” the data to the Public Safety Answering Points.
Barnett said the issue goes beyond bidding and rebidding.
“Even if you take the carriers explanation at its best,” he said, “there’s still going to be about 20 to 30 percent of the calls every year that will not have good locations — may have misleading locations. So, we're talking about tens of millions of 911 calls. That's just not acceptable.”
The technologies available from providers like NextNav, Polaris, and TruePosition, said Barnett, will work indoors and out. “That's why we say if you adopt indoor requirements, it really clears up all of the problems.”
Emergency professionals want the FCC to fix both the indoor and outdoor location accuracy problems, he said, and his organization is encouraging the FCC to move quickly to issue a notice of proposed rule making. If that can be done expeditiously, he said, rules could be completed by summer and largely implemented within a year or two.
“When we got into this,” Barnett told Inside GNSS, “what we started hearing from 911 professionals was: ‘we want indoor location accuracy — but we want the FCC to fix location accuracy. Period. It's not working anymore.’”
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