Featured Research

from universities, journals, and other organizations

Flexible channel width improves user experience on wireless systems

Date:
June 4, 2012
Source:
North Carolina State University
Summary:
Researchers have developed a technique to efficiently divide the bandwidth of the wireless spectrum in multi-hop wireless networks to improve operation and provide all users in the network with the best possible performance.

Researchers from North Carolina State University have developed a technique to efficiently divide the bandwidth of the wireless spectrum in multi-hop wireless networks to improve operation and provide all users in the network with the best possible performance.

Related Articles


"Our objective is to maximize throughput while ensuring that all users get similar 'quality of experience' from the wireless system, meaning that users get similar levels of satisfaction from the performance they experience from whatever applications they're running," says Parth Pathak, a Ph.D. student in computer science at NC State and lead author of a paper describing the research.

Multi-hop wireless networks use multiple wireless nodes to provide coverage to a large area by forwarding and receiving data wirelessly between the nodes. However, because they have limited bandwidth and may interfere with each other's transmissions, these networks can have difficulty providing service fairly to all users within the network. Users who place significant demands on network bandwidth can effectively throw the system off balance, with some parts of the network clogging up while others remain underutilized.

Over the past few years, new technology has become available that could help multi-hop networks use their wireless bandwidth more efficiently by splitting the band into channels of varying sizes, according to the needs of the users in the network. Previously, it was only possible to form channels of equal size. However, it was unclear how multi-hop networks could take advantage of this technology, because there was not a clear way to determine how these varying channel widths should be assigned.

Now an NC State team has advanced a solution to the problem.

"We have developed a technique that improves network performance by determining how much channel width each user needs in order to run his or her applications," says Dr. Rudra Dutta, an associate professor of computer science at NC State and co-author of the paper. "This technique is dynamic. The channel width may change -- becoming larger or smaller -- as the data travels between nodes in the network. The amount of channel width allotted to users is constantly being modified to maximize the efficiency of the system and avoid what are, basically, data traffic jams."

In simulation models, the new technique results in significant improvements in a network's data throughput and in its "fairness" -- the degree to which all network users benefit from this throughput.

The researchers hope to test the technique in real-world conditions using CentMesh, a wireless network on the NC State campus.

The paper, "Channel Width Assignment Using Relative Backlog: Extending Back-pressure to Physical Layer," was co-authored by former NC State master's student Sankalp Nimborkhar. The paper will be presented June 12 at the 13th International Symposium on Mobile Ad Hoc Networking and Computing in Hilton Head, S.C. The research was supported by the U.S. Army Research Office and the Secure Open Systems Initiative at NC State.


Story Source:

The above story is based on materials provided by North Carolina State University. Note: Materials may be edited for content and length.


Cite This Page:

North Carolina State University. "Flexible channel width improves user experience on wireless systems." ScienceDaily. ScienceDaily, 4 June 2012. <www.sciencedaily.com/releases/2012/06/120604111418.htm>.
North Carolina State University. (2012, June 4). Flexible channel width improves user experience on wireless systems. ScienceDaily. Retrieved March 4, 2015 from www.sciencedaily.com/releases/2012/06/120604111418.htm
North Carolina State University. "Flexible channel width improves user experience on wireless systems." ScienceDaily. www.sciencedaily.com/releases/2012/06/120604111418.htm (accessed March 4, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, March 4, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Forensic Holodeck Creates 3D Crime Scenes

Forensic Holodeck Creates 3D Crime Scenes

Reuters - Innovations Video Online (Mar. 3, 2015) A holodeck is no longer the preserve of TV sci-fi classic Star Trek, thanks to researchers from the Institute of Forensic Medicine Zurich, who have created what they say is the first system in the world to visualise the 3D data of forensic scans. Jim Drury saw it in operation. Video provided by Reuters
Powered by NewsLook.com
Solar Plane Passes New Test Ahead of World Tour

Solar Plane Passes New Test Ahead of World Tour

AFP (Mar. 2, 2015) A solar-powered plane made a third successful test flight in the United Arab Emirates on Monday ahead of a planned round-the-world tour to promote alternative energy. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
Electric Hydrofoiling Watercraft Delivers Eco-Friendly Thrills

Electric Hydrofoiling Watercraft Delivers Eco-Friendly Thrills

Reuters - Innovations Video Online (Mar. 2, 2015) The Quadrofoil is a high-tech electric personal watercraft that its makers call a &apos;sports car for the water&apos;. When it hits 10 km/h, the Slovenian-engineered Quadrofoil is lifted above the water onto four wing-like hydrofoils where it &apos;flies&apos; above the surface with minimal water resistance. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Everything You Need To Know About Mobile Payments In 2015

Everything You Need To Know About Mobile Payments In 2015

Newsy (Mar. 2, 2015) This year, mobile payments might finally catch on. Here are the things you need to know to stay on top of the latest developments. 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