Data-intensive Internet applications on smartphones, tablets and laptops are more popular than ever before. The result: Traffic on the mobile network is increasing at a blinding speed. Intelligent technologies are intended to increase the data rates on the new LTE network. The solution is to use the mobile networks jointly.
Intelligent algorithms permit decentralized control of the distribution of radio frequencies in LTE networks. © Fraunhofer HHI
Smartphones and tablets are some of the big sellers of the past year. Mobile Internet usage has increased rapidly with the sales success: according to a study of the industry association VATM, in 2011 the average data volume per mobile Internet user increased by 82 percent in Germany. In contrast to its predecessor UMTS, with the new LTE mobile radio standard, the clearly higher data rates and the shorter signal transmission times, providers want to cover the expected traffic. That is why the expansion of the LTE network is being pursued aggressively. Providers are setting up ever more base stations to prevent data bottlenecks, because with each new sending and receiving station increases network capacity. Basically, a network can be densified as much as desired. Neighboring base stations often use the same frequencies, and networks can cope with the resulting interference between the cell towers. However, this also means setting up ever more mobile radio antennas, which drives up costs and takes a great deal of time.
Researchers at the Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute HHI in Berlin have developed new solutions to meet the growing requirements. The idea: two or more providers use the network jointly, meaning they are sharing the frequencies and the infrastructure. “This way, for example, customers of network provider A in Bavaria could use the base stations of network provider B in Brandenburg and vice versa,“ says Dr. Volker Jungnickel of HHI. LTE Spectrum Sharing, as the experts call their technology, offers providers many advantages beyond cost savings. They can close coverage gaps and make LTE available more quickly in rural areas.
“In the city, by combining the functions, they can double the density of the base stations and thus the capacity of both networks. The data rate per surface area increases, and more users are provided with service at the same time without having to erect new antennas. The end user profits from shorter downloading and uploading times,“ the researcher explains. On top of that, short-term peak loads can be absorbed reciprocally: if one network is under particular stress, one network partner can increase its bandwidth by borrowing frequency shares from another network partner. Because frequencies can be divided up dependent not only of load but also of channel, if the reception is bad in one‘s own network, one can simply use the spectrum of the partner network.
LTE spectrum sharing is made possible by intelligent algorithms that control the allocation of the radio frequencies in a decentralized way. For this to happen, certain information, such as the traffic load, the quality of the channel, and which services are being used at the moment is exchanged between providers. “With our technology, networks can coordinate to provide access to additional radio resources in the network of the partner. With the aid of fixed rules, we can distribute signal processing across networks, so no central control is required,“ Jungnickel points out. The researchers will be on hand to demonstrate how this works, live and in real-time, at the Mobile World Congress in Barcelona from February 27 - March 1, 2012 in Hall 2, Booth E41.
Dr. rer. nat. Volker Jungnickel | Fraunhofer Research News
Study suggests buried Internet infrastructure at risk as sea levels rise
17.07.2018 | University of Wisconsin-Madison
Microscopic trampoline may help create networks of quantum computers
17.07.2018 | University of Colorado at Boulder
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
Ultra-short, high-intensity X-ray flashes open the door to the foundations of chemical reactions. Free-electron lasers generate these kinds of pulses, but there is a catch: the pulses vary in duration and energy. An international research team has now presented a solution: Using a ring of 16 detectors and a circularly polarized laser beam, they can determine both factors with attosecond accuracy.
Free-electron lasers (FELs) generate extremely short and intense X-ray flashes. Researchers can use these flashes to resolve structures with diameters on the...
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
17.07.2018 | Information Technology
17.07.2018 | Materials Sciences
17.07.2018 | Power and Electrical Engineering