INTER-CHANNEL ENCODING IN DWDM SYSTEMS, AS A NEW WAY TO IMPROVE THE SPECTRAL EFFICIENCY
Dariya P. Shestakova, Ural Technical Institute of Communications and Informatics (branch) FSBEI HE “Siberian State University
of Telecommunications and Informatics” in Yekaterinburg, Ekaterinburg, Russia,
puzyreva-darya@mail.ru
Il’nur I. Salifov, Ural Technical Institute of Communications and Informatics (branch) FSBEI HE “Siberian State University
of Telecommunications and Informatics” in Yekaterinburgá Ekaterinburg, Russia;
MRF South PJSC “Rostelecom”, Krasnodar, Russia, Ilnur.Salifov@rt.ru
Ivan I. Shestakov, Ural Technical Institute of Communications and Informatics (branch) FSBEI HE “Siberian State University
of Telecommunications and Informatics” in Yekaterinburg,, Ekaterinburg, Russia, ivansche2007@rambler.ru
Abstract
The modern world of infocommunications is based on transport communication networks, such as WDM (Wavelength Division Division Multiplexing) wave spectral multiplexing networks, designed to transmit various services (Ethernet, IP, STM-N). For reliable transmission of these services, the WDM transport networks are subject to rather high requirements for network reliability. The reliability of a WDM network is understood as the reservation of optical channels and routes, the reservation of equipment and a guide environment. From the economic and practical point of view, redundancy on WDM networks is a complex task, which affects the final cost of equipment. Depending on the tasks assigned in the projected WDM networks, various variants of traditional optical channel redundancy schemes can be implemented. Analyzing the existing schemes, one can say that the presented redundancy options, in particular, the redundancy of optical channels DWDM, have disadvantages, such as the high cost of equipment and inefficient use of the frequency range. The inefficient use of the frequency range is due to the fact that part of the optical channels are used as backup channels, which leads to a decrease in the capacity of the DWDM system. The solution of these two problems in literature, in scientific articles is not considered. Using a systematic approach to solving these problems, new schemes for reserving optical channels of DWDM have been developed at both the optical and electrical levels. Unlike traditional DWDM optical channel redundancy schemes, the new approach uses simple components, such as 1 ? 2 optical splitters, polarizers and polarization filters. The use of these components will reduce the cost of the transponder of the DWDM multiplexer, as well as use all the optical channels of the DWDM system. However, the use of these components in the organization of redundancy of optical channels in DWDM systems with modulation type DP-QPSK, DP-16QAM, DP-32QAM is not advisable.
Keywords: wave Spectral Multiplexing, WDM Optical Channel Reservation.
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Information about authors:
Sariya. P. Shestakova, Ural Technical Institute of Communications and Informatics (branch) FSBEI HE “Siberian State University of Telecommunications and Informatics” in Yekaterinburg, graduate student, Ekaterinburg, Russia
Il’nur I. Salifov, Ural Technical Institute of Communications and Informatics (branch) FSBEI HE “Siberian State University of Telecommunications and Informatics” in Yekaterinburg, candidate of technical sciences, associate professor at the department of Multichannel Electrical Communications, head of the competence center for technical training of the MRF South PJSC “Rostelecom”, Krasnodar, Russia
Ivan I. Shestakov, Ural Technical Institute of Communications and Informatics (branch) FSBEI HE “Siberian State University of Telecommunications and Informatics” in Yekaterinburg, senior lecturer, Ekaterinburg, Russia