Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Three generations of optic Internet

24.09.2002


Professor Mikel Izal from the Public University of Navarre, Basque Country, has analysed the problems to integrate new optic networks in actual network and transfer level (TCP/IP) Internet protocols. This integration will enable to create the core of the second Internet generation in future, the so called Internet 2.



In that area, technological innovations are created everyday and the thesis has been focused on the burst switching networks corresponding to the second optic Internet generation.

Nowadays new optic technologies are based on wavelength division multiplexing. That way, several channels are transferred in a single optic fibre by using different wavelength carriers. Those optic technologies are divided into three generations. The first generation is based on wavelength division multiplexing (WDM). Here it is possible to create high capacity link networks between actual IP routers. The second one offers the possibility to make some operations of direct switching via optic technology. That way, the core of the network may offer optic channels, named Ligthpaths, or it can switch data in large packages, named burst switching networks.


Finally, the third generation would make all steps of channelling and processing of data-packages in the optic level, obtaining a complete optic switching of packages. At the present, the first generation is being implanted, as there are just experimental prototypes or architecture proposals for the second and third generations.

Problems with protocols

One of the theoretical advantage of optic Internet networks would be a faster data-transfer. However, if data is transferred in small packages, even if new networks have more transfer capacity and bandwidth, the network will be slow. In fact, the current problems of transfer time are based on protocols that were designed to have a secure network. Therefore, in order to make better use of speed capacity, data packages must be handled in larger packages.

In order to achieve that result, fractal traffic patterns or autosimilar patterns have been used. In new network architectures, the services of Internet protocols have been analysed, analytic expressions have been obtained and finally, simulations of such networks have been made to estimate the results.

Similarly, to offer the services Internet nowadays has the most effective protocols to be used in the second and third generations have been studied. In those studies the same result has been obtained: actual protocols would reduce significantly the speed in second and third generation networks. Therefore, it would be better to use protocols that have less interaction, but send larger data packages.

Finally, professor Izal has studied Internet traffic in a burst switching system. According to that research, it can be said that Internet and telephone traffic are not the same. The latter is stable in a certain scale, but Internet traffic is more difficult to predict. Therefore, the characteristics of burst traffic have been analysed and, as a consequence, the size and number of bursts have been grouped in a pattern. Indeed, that pattern could be useful for the design of optic switching of core of the network.

Garazi Andonegi | alfa
Further information:
http://www.basqueresearch.com/index.asp?Gelaxka=1&hizk=I

More articles from Information Technology:

nachricht High-pressure scientists in Bayreuth discover promising material for information technology
25.02.2020 | Universität Bayreuth

nachricht When plasmons reach atomic flatland
25.02.2020 | Max-Planck-Institut für Struktur und Dynamik der Materie

All articles from Information Technology >>>

The most recent press releases about innovation >>>

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

Im Focus: High-pressure scientists in Bayreuth discover promising material for information technology

Researchers at the University of Bayreuth have discovered an unusual material: When cooled down to two degrees Celsius, its crystal structure and electronic properties change abruptly and significantly. In this new state, the distances between iron atoms can be tailored with the help of light beams. This opens up intriguing possibilities for application in the field of information technology. The scientists have presented their discovery in the journal "Angewandte Chemie - International Edition". The new findings are the result of close cooperation with partnering facilities in Augsburg, Dresden, Hamburg, and Moscow.

The material is an unusual form of iron oxide with the formula Fe₅O₆. The researchers produced it at a pressure of 15 gigapascals in a high-pressure laboratory...

Im Focus: From China to the South Pole: Joining forces to solve the neutrino mass puzzle

Study by Mainz physicists indicates that the next generation of neutrino experiments may well find the answer to one of the most pressing issues in neutrino physics

Among the most exciting challenges in modern physics is the identification of the neutrino mass ordering. Physicists from the Cluster of Excellence PRISMA+ at...

Im Focus: Therapies without drugs

Fraunhofer researchers are investigating the potential of microimplants to stimulate nerve cells and treat chronic conditions like asthma, diabetes, or Parkinson’s disease. Find out what makes this form of treatment so appealing and which challenges the researchers still have to master.

A study by the Robert Koch Institute has found that one in four women will suffer from weak bladders at some point in their lives. Treatments of this condition...

Im Focus: A step towards controlling spin-dependent petahertz electronics by material defects

The operational speed of semiconductors in various electronic and optoelectronic devices is limited to several gigahertz (a billion oscillations per second). This constrains the upper limit of the operational speed of computing. Now researchers from the Max Planck Institute for the Structure and Dynamics of Matter in Hamburg, Germany, and the Indian Institute of Technology in Bombay have explained how these processes can be sped up through the use of light waves and defected solid materials.

Light waves perform several hundred trillion oscillations per second. Hence, it is natural to envision employing light oscillations to drive the electronic...

Im Focus: Freiburg researcher investigate the origins of surface texture

Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.

Prof. Dr. Lars Pastewka from the Simulation group at the Department of Microsystems Engineering at the University of Freiburg and his team have simulated such...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

70th Lindau Nobel Laureate Meeting: Around 70 Laureates set to meet with young scientists from approx. 100 countries

12.02.2020 | Event News

11th Advanced Battery Power Conference, March 24-25, 2020 in Münster/Germany

16.01.2020 | Event News

Laser Colloquium Hydrogen LKH2: fast and reliable fuel cell manufacturing

15.01.2020 | Event News

 
Latest News

Turbomachine expander offers efficient, safe strategy for heating, cooling

25.02.2020 | Power and Electrical Engineering

The seismicity of Mars

25.02.2020 | Earth Sciences

Cancer cachexia: Extracellular ligand helps to prevent muscle loss

25.02.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>