Uporaba DWDM tehnologije v omrežju ARNES; zagotavljanje povezav točka–točka za projekte

The Use of DWDM Technology in the ARNES Network; Provisioning of point to point connections for projects.

Avgust Jauk, Arnes

Predstavitev

Povzetek
Kakovostne telekomunikacijske povezave so postale predpogoj za uspešno izvajanje izobraževalnih in raziskovalnih procesov. Zaradi hitre rasti prometa in potreb po uvajanju novih, zahtevnejših komunikacijskih storitev je potreben prehod na zmogljive optične povezave tako v nacionalnem hrbteničnem omrežju kot tudi na povezavah posameznih organizacij v to omrežje. V članku je podan pregled tehnologij, ki omogočajo zagotavljanje več desetgigabitnih povezav preko optičnih vlaken. Sledi opis rešitve, ki je kljub nekajkrat višjim cenam zakupa optičnih vlaken kot v tujini omogočila uporabo teh tehnologij v hrbtenici omrežja ARNES. Podani so arhitektura in topologija novega omrežja, podatki o zmogljivosti posameznih povezav ter nove možnosti, ki so sedaj na voljo znotraj Slovenije v povezavi z evropskim izobraževalnim in raziskovalnim omrežjem GÉANT2 pa tudi po celotni Evropi in širše. Poseben poudarek je podan namenskim gigabitnim povezavam točka–točka za posamezne zahtevnejše projekte. V zaključku je opisan plan nadaljnjega razvoja optične hrbtenice omrežja ARNES, podan pa je tudi kratek pregled bodočega razvoja WDM-tehnologij in etherneta, ki bo omogočil kapacitete 40 ter 100 gigabit/s.

Ključne besede
WAN, CWDM, DWDM, ethernet, GÉANT2, optične komunikacije.

Abstract
Quality telecommunication connections have become a prerequisite for the success of educational and research activities. Because of ever increasing traffic and the needs of new and demanding communication services, it has become necessary to upgrade the national backbone network as well as connections to individual organizations to optical fiber links. In this article, we present an overview of technologies which enable greater than 10 Gb connections over optical fiber. Also included is a description of the solution which, in spite of prices of fiber lease which are several times higher than in other countries, enabled the use of these technologies in the ARNES backbone. The architecture and topology of the new network has been provided together with details of the capacity of the individual connections and new possibilities which are now available in Slovenia, and through the connection to the European research and education network GEANT2 also throughout the Europe and wider. Special emphasis has been given to gigabit point to point connections for individual more demanding projects. In closing, a plan for future development of ARNES optical backbone is given, together with a short look at the development of WDM technology and Ethernet, which will enable capacities of 40 and 100 Gb.

Keywords
WAN, CWDM, DWDM, Ethernet, GÉANT2, optical communications.