Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Predicting the movements of a mobile phone

22.09.2004


Predicting the movements of mobile cell phone communications systems, thus providing a guarantee of the quality of service (QoS) and offering locating services, as well as recognising imperfect texts on a dictionary basis, are two of the applications demonstrated by José Javier Astrain Escola, engineer in the Public University of Navarre. The tool that makes this task possible is one that employs fuzzy state automatas with empty chain transitions.



At the beginning of the study, this engineer found that there was very little literature on the subject: “As regards the theory fuzzy state automatas with empty chain transitions, there was no work in the literature. Regarding the classification of chains, they were presented as the most common techniques, as probabilistic types although in this PhD, we have shown that fuzzy techniques enable improved final recognition rates than these”.

It is in the mobile cellular communications systems that, “currently great efforts are being made to provide locating mechanisms, quality of service and recognition of the mobility of users with latest–generation systems such as UMTS”.


Thus, José Javier Astrain’s PhD puts forward “a tool that enables the measurement of the similarity between chains, working with imperfect chains of symbols. In this way, we have presented a fuzzy automata which gives rise to various families of values as a function of the parameters employed by said autómata.”

This new automata works with fuzzy state sets and fuzzy symbols chains. The automata was validated “by means of a series of experiments that enabled us to compare the results obtained with other techniques proposed in the literature”.

In this context, the most relevant contribution of the work is “the capacity to work with errors of edition and the handling by the automata of imperfect decisions inherited from the previous stages of classification”.

On terminating the investigation, José Javier Astrain underlined the improvements achieved, “the deformed fuzzy state automata achieving recognition rates of 99% when the observed texts show error rates of 80%”.

Improving service quality

Once the capacity of the fuzzy automatas and deformed fuzzy are shown to tackle the problems of the imperfect recognition of symbols, “we proposed taking on board an industrial problem of great current interest, the application of techniques developed for the management of quality of service in mobile communications systems”.

As regards QoS management in mobile cell phone communications systems, “we offer a model of mobility based on chains of symbols with three different types of coding. The chains of symbols which represent the displacement of the mobile terminal throughout its movements are obtained by the mobile by the triangulation of adjacent base stations. These chains are compared by the fuzzy automata of the terminal with those of a dictionary that represent the most frequent routes within the cell in which the terminal is found. On determining the route followed, this makes it possible for the terminal to initiate the reserve of resources in the target cell with sufficient advance warning thanks to the prediction of location calculated by the automata”.

Thus, “a tool is proposed that enables the satisfactory resolution of these needs at a low computational cost, an interchange of messages between base stations and terminals and that can integrate itself into new designs of these types of networks”.

Garazi Andonegi | alfa
Further information:
http://www.basqueresearch.com

More articles from Information Technology:

nachricht The TU Ilmenau develops tomorrow’s chip technology today
27.04.2017 | Technische Universität Ilmenau

nachricht Five developments for improved data exploitation
19.04.2017 | Deutsches Forschungszentrum für Künstliche Intelligenz GmbH, DFKI

All articles from Information Technology >>>

The most recent press releases about innovation >>>

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

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Fighting drug resistant tuberculosis – InfectoGnostics meets MYCO-NET² partners in Peru

28.04.2017 | Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

 
Latest News

Wireless power can drive tiny electronic devices in the GI tract

28.04.2017 | Medical Engineering

Ice cave in Transylvania yields window into region's past

28.04.2017 | Earth Sciences

Nose2Brain – Better Therapy for Multiple Sclerosis

28.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>