Featured Research

from universities, journals, and other organizations

New Approach To Ad Hoc Networks For First Responders Debuts

Date:
August 9, 2008
Source:
National Institute of Standards and Technology
Summary:
Researchers successfully demonstrated a prototype approach to maintain two-way communications with first responders as they make their way in building fires, and mine and tunnel collapses.

National Institute of Standards and Technology (NIST) researchers successfully demonstrated a prototype approach to maintain two-way communications with first responders as they make their way in building fires, and mine and tunnel collapses. These and other disasters in enclosed environments are often rife with radio dead spots and conditions that can severely weaken signals.

On Aug. 5, in conjunction with the 2008 Workshop on Precision Indoor Personnel Location and Tracking for Emergency Responders at Worcester Polytechnic Institute in Massachusetts, NIST information technology experts put their version of a “breadcrumb communication system” through its paces. The system is highly automated so that it can be deployed on the fly. It features “smart” multihop relays—sometimes referred to as “breadcrumbs”—that, in effect, advise first responders when to place the next device so as to extend the communications range.

Assembled from off-the-shelf microprocessors and other standard hardware, the relays incorporate NIST-developed software that monitors the status of radio communication signals. The algorithms embedded in the software rapidly assess the strength of received signals so that the device can automatically alert first responders to lay down the next relay before they walk out of range and lose the radio signal.

Other approaches to setting up ad hoc wireless networks in emergency situations typically instruct first responders to lay down breadcrumb relays, for example, in distance increments, around every corner in corridors, or in every stairwell. “Static rules do not take into account all the environmental variables that affect signal degradation, such as attenuation, fading and interference,” explains NIST’s Nader Moayeri. “The communication range in a commercial building corridor is vastly different from that of a factory floor, which is unlike a coal mine.”

That’s why Moayeri, Michael Souryal and other members of the NIST team developed software that implements an “adaptive strategy” for maintaining connectivity. Their approach builds on NIST’s extensive research on measuring and monitoring radio signals in buildings.

Automated deployment of relays, Moayeri says, is a key performance requirement because it does not divert the attention of emergency personnel. The NIST software also provides advice on placement to improve the robustness of signals. The NIST researchers evaluated their adaptive breadcrumb deployment strategy in computer simulations of a wide variety of emergency scenarios and in several field tests. Tests were conducted with two prototype breadcrumb radio systems developed at NIST, one operating at 900 megahertz and the other at 2.4 gigahertz.

Candidate approaches to maintaining continuous communication links between responders and incident command centers were evaluated on the basis of number of signal packets lost in transmissions, number of relays deployed, and delays in end-to-end communications.

The NIST team is interested in sharing their prototype technology and its underlying concepts with businesses and other organizations working to improve the quality and reliability of first responder communication systems.


Story Source:

The above story is based on materials provided by National Institute of Standards and Technology. Note: Materials may be edited for content and length.


Cite This Page:

National Institute of Standards and Technology. "New Approach To Ad Hoc Networks For First Responders Debuts." ScienceDaily. ScienceDaily, 9 August 2008. <www.sciencedaily.com/releases/2008/08/080807112643.htm>.
National Institute of Standards and Technology. (2008, August 9). New Approach To Ad Hoc Networks For First Responders Debuts. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2008/08/080807112643.htm
National Institute of Standards and Technology. "New Approach To Ad Hoc Networks For First Responders Debuts." ScienceDaily. www.sciencedaily.com/releases/2008/08/080807112643.htm (accessed October 1, 2014).

Share This



More Matter & Energy News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

US Police Put Body Cameras to the Test

US Police Put Body Cameras to the Test

AFP (Oct. 1, 2014) Police body cameras are gradually being rolled out across the US, with interest surging after the fatal police shooting in August of an unarmed black teenager. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com
Robotic Hair Restoration

Robotic Hair Restoration

Ivanhoe (Oct. 1, 2014) A new robotic procedure is changing the way we transplant hair. The ARTAS robot leaves no linear scarring and provides more natural results. Video provided by Ivanhoe
Powered by NewsLook.com
Argentina's Tax Evaders Detected, Hunted Down by Drones

Argentina's Tax Evaders Detected, Hunted Down by Drones

AFP (Sep. 30, 2014) Argentina doesn't only have Lionel Messi the footballer, it has now also acquired "Mesi" the drone system which monitors undeclared mansions, swimming pools and soy fields to curb tax evasion in the country. Duration: 01:18 Video provided by AFP
Powered by NewsLook.com
Do Video Games Trump Brain Training For Cognitive Boosts?

Do Video Games Trump Brain Training For Cognitive Boosts?

Newsy (Sep. 29, 2014) More and more studies are showing positive benefits to playing video games, but the jury is still out on brain training programs. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins