| Abstract [eng] |
The aim of this project is to develop a methodology for the assessment of the efficiency of the space division multiplexing (SDM) system in which optical burst switching is performed. The paper analyses scientific literature and peculiarities of SDM systems. An overview of the various components that can be used in multicore fiber (SDM) systems was made. During the research of scientific literature, it was found that no studies have been conducted to investigate cases of optical burst switching (OBS) through multicore fibers. The main task of this technology is the aggregation of packets (buffering and redirecting) from different Internet sources (routers) on the peripheral network nodes into optical data bursts. The main problem of OBS networks is the collision of optical bursts, when two or more bursts require the same channel or wavelength at one output. Various solutions for wavelength, time, and space can be used to avoid collision of optical bursts. In order to solve these collisions in multicore fiber networks, it was decided to apply fiber delay lines (buffers) and transmitting the bursts to separate cores in multicore fiber networks. In order to evaluate the functionality of such systems, a methodology for assessing their effectiveness was developed. Analytical models of Markov's processes (2, 3 and 4 cores) were designed to evaluate the effectiveness of the SDM systems with OBS. However, as the number of cores increases, Markov's model becomes more complex, so a simulation model was created to investigate SDM systems with fibers with more cores. Using the models made, it was found, that when having smaller loads, it was more efficient to transfer data bursts through fibers with fewer cores. At higher loads – fibers with more cores. It was found that by increasing the buffer capacity, the cores become more evenly occupied, the bursts are more evenly distributed between the cores, resulting in increased efficiency. Also, the maximum lengths of multicore fibers over which efficiency becomes equal to 0 is set. |
