"Triple play" is the magic word: the parallel transmission of information, voice and video images in real time. At present, though, network operators are finding it hard to cope with the rising data stream. Customers with a DSL connection expect high-speed delivery of data at all times despite the growing volume of information – but there is no guarantee that they will get it. At peak traffic times, the data stream slows down and data may even be lost on the way. This type of failure severely impairs Internet telephony, as the words get chopped up and are inclined to echo. When videos are played back in real time, a time delay causes the picture to jerk. It is therefore essential to have a guaranteed data transmission rate for future multimedia applications.
Scientists from the Munich-based Fraunhofer Institute for Communication Systems ESK and the University of Paderborn are among the participants in a collaborative project with Infineon Technologies dubbed "NGN PlaNetS", which has been set up to investigate the use of Ethernet on the Internet. This technology has been established in private and corporate networks for a long time – and it is cheaper than expanding network capacity, too. "Ethernet has the advantage of being used already in more than 95 percent of home and company networks. That makes it easier to combine it with the Internet," explains ESK scientist Dietmar Tölle. The researchers have meanwhile demonstrated in a laboratory that Ethernet is indeed able to handle triple-play services.
The Ethernet solution enables data streams to be delivered without difficulty at the same time as videos and telephone calls. The system is flexible enough to bypass overloaded sections of the data path via alternative routes. The ESK has developed procedures for monitoring all current data streams and re-routing them where there is a risk of congestion. The industrial partners in the NGN-PlaNetS project are testing these procedures in prototypes for the next generation of Internet.
Monika Weiner | alfa
Supercomputing the emergence of material behavior
18.05.2018 | University of Texas at Austin, Texas Advanced Computing Center
Keeping a Close Eye on Ice Loss
18.05.2018 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
18.05.2018 | Power and Electrical Engineering
18.05.2018 | Information Technology
18.05.2018 | Information Technology