Future Cell Phones Will Make Emergency Calls Even When the Network Goes Down

A new cellular standard, LTE Direct, will be approved by the end of the year

Join Our Community of Science Lovers!

On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.

When Hurricane Sandy battered the Eastern seaboard in 2012, it took down up to half of all cellular towers in the hardest-hit areas. The storm highlighted a flaw in our reliance on wireless phones as a primary means of communication. Qualcomm and other wireless companies have been working on a new cellular standard—a set of technical procedures that ensures devices can “talk” to one another—that will keep the lines open if the network fails. The Proximity Services, or so-called LTE Direct, standard will be approved by the end of the year.

In a typical cell phone call, the signal travels through a cellular tower. LTE Direct cuts out that middleman. In emergencies, phones that use it will be able to connect directly with one another over the same frequency as 4G LTE transmissions. Users will be able to call other users or first responders within about 500 meters. If the target is not nearby, the system can relay a message through multiple phones until it reaches its destination.

Qualcomm and others will need to update their antennas and processors to take advantage of LTE Direct, so it will be a year or more before phones have this functionality. But an approved standard means companies can get working.

It’s Time to Stand Up for Science

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in that two-century history.

I’ve been a Scientific American subscriber since I was 12 years old, and it helped shape the way I look at the world. SciAm always educates and delights me, and inspires a sense of awe for our vast, beautiful universe. I hope it does that for you, too.

If you subscribe to Scientific American, you help ensure that our coverage is centered on meaningful research and discovery; that we have the resources to report on the decisions that threaten labs across the U.S.; and that we support both budding and working scientists at a time when the value of science itself too often goes unrecognized.

In return, you get essential news, captivating podcasts, brilliant infographics, can't-miss newsletters, must-watch videos, challenging games, and the science world's best writing and reporting. You can even gift someone a subscription.

There has never been a more important time for us to stand up and show why science matters. I hope you’ll support us in that mission.

Thank you,

David M. Ewalt, Editor in Chief, Scientific American