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
Gecko adhesion technology moves closer to industrial uses
13.12.2017 | Georgia Institute of Technology
New silicon structure opens the gate to quantum computers
12.12.2017 | Princeton University
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
13.12.2017 | Health and Medicine
13.12.2017 | Physics and Astronomy
13.12.2017 | Life Sciences