Boosting The Efficiency Of Multi-Hop Wireless Networks

Researchers have found an efficient means of managing multi-hop wireless networks using an algorithm that regulates how much power to use for each data transmission depending on its final destination.

With multi-hop wireless networks, data is relayed from one point to another. For longer distances, the data can hop many times. Because of the geometry nodes located near the center of the network receive a disproportionate amount of traffic. These "hot spots" create interference with each other, limiting how quickly the network can transfer data.

In a paper, the researcher Parth H. Pathak and Rudra Dutta describe a way to boost the amount of data the networks can transmit by 20 to 80 percent and extend the lifetime of the network if the nodes are battery-powered.

Science Daily explains: "Data can be transmitted at low power over short distances, which limits the degree of interference with other nodes. But this approach means that the data may have to be transmitted through many nodes before reaching its final destination. Or, data can be transmitted at high power, which means the data can be sent further and more quickly -- but the powerful transmission may interfere with transmissions from many other nodes."

The researchers from North Carolina State University were supported in part by the U.S. Army Research Office.