Improving wifi networks through mathematics

Technology Review : As more and more mobile devices are being deployed, the need to improve wireless bandwidth is growing. Because of interference and congestion, packets of information can get lost; the need to have them re-sent further burdens the system. Rather than add base stations, tap more spectrum, or crank up transmitter wattage, however, Muriel Medard at MIT and coworkers have proposed using algebra, writes David Talbot for Technology Review. Instead of sending packets of information, the researchers send algebraic equations that describe series of packets. When a packet goes missing during a transmission, the receiver can solve for the missing information rather than ask the network to resend it. According to Medard, the technology not only could significantly boost bandwidth but also promises to improve the system’s efficiency.