Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Mobile telephony without base stations

13.01.2011
The new generation of mobile phone technology makes it possible to communicate directly from one telephone to another without having to rely on base stations.

A dissertation at Linköping University in Sweden presents a program that runs on telephones and can deliver messages even when the infrastructure for telecommunication has been knocked out.

Natural disasters in recent years have shown how vulnerable our society is to unforeseen and disruptive events. At the same time we have seen that there is a strong will to help people in crisis areas. But for rescue operations to work, telecommunications need to be up and running.

Mobile telephone base stations and satellite telephones are of major importance, but they have their limitations in terms of cost, construction time, and access on a large scale. Mikael Asplund, a doctoral candidate in computer science, is now presenting, among other things, a complement to existing communication channels in a crisis.

The idea is to use the new generation of mobile phones to send messages directly from one phone to another. The advantage of this type of spontaneous network is that it can be used by everyone, without any special equipment, and it can be set up virtually instantly to solve problems that arise in a specific place.

But such networks bring not only great potential but also challenges, as gaps and network partitions can arise, so that nobody can forward a message. At the same time the use of batteries necessitates great energy efficiency. Mikael Asplund and his associates have designed a program that overcomes these difficulties when it is run on telephones, making it possible to deliver messages under extremely severe conditions.

The first part of the dissertation also deals with network partitions in a more controlled environment. This problem can arise, for example, when an Internet bank experiences disruptions in its network connection to other parts of the bank. The dissertation presents a method for the bank to continue to provide service to its customers despite such breakdowns.

The dissertation Disconnected discoveries: Availability studies in partitioned networks is published by LiU Electronic Press

Contact: Mikael Asplund +46 (0)13-282668, +46 (0)707-481462, mikael.asplund@liu.se

Pressofficer Åke Hjelm; ake.hjelm@liu.se; +46-13 281 395

Åke Hjelm | idw
Further information:
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-60553
http://www.liu.se

More articles from Information Technology:

nachricht Construction of practical quantum computers radically simplified
05.12.2016 | University of Sussex

nachricht UT professor develops algorithm to improve online mapping of disaster areas
29.11.2016 | University of Tennessee at Knoxville

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

NTU scientists build new ultrasound device using 3-D printing technology

07.12.2016 | Health and Medicine

The balancing act: An enzyme that links endocytosis to membrane recycling

07.12.2016 | Life Sciences

How to turn white fat brown

07.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>