Oreshkov V. Increasing of efficiency of digital subscriber lines using in the broadband access networks

The purpose: development of methods and ways of improving efficiency in the use of digital subscriber line broadband networks, built on the domestic communication lines with xDSL-technologies. The object: signal transmission processes by digital lines of the broadband access network built using xDSL-technologies. The subject: characteristics of the digital lines of the broadband access network built using xDSL-technologies. The scientific novelty and the practical value of obtained results: First obtain a relation which allows to determine the exact value of the maximum number of bits of information that can pass for a parcel carrier frequencies TS OHS. The first time the functional dependence of rate asymmetric TS xDSL on domestic CL RTN on their characteristics. Improved method for calculating the length of the regeneration length for the TS technology SHDSL (TS SHDSL). Specified functional dependence of the rate of transmission characteristics of multi-pair telephone cable TП type considering crosstalk for a joint venture for technology ADSL2+ (SP ADSL2+). The first time the functional dependence of the rate of transmission, provided by the joint venture for technology VDSL2 (TS VDSL2) when working on multi-pair cables of TП and FTP Category 5, the characteristics of these cables to external additive noise. Derived a formula for determining the maximum number of bits of information that might pass for a parcel carrier frequencies TS OHS can be used in the algorithms of the functioning of the equipment. The resulting estimates are achievable rate TS SHDSL, ADSL2+, VDSL and VDSL2 CL RTN can be used to provide recommendations for the reconstruction of the CL RTN to improve the efficiency of their application. Elaborate algorithms for network design BA implemented in software, can be used in the design of networks of BA in the educational process. Proceedings of the thesis introduced in the educational process at the Department of Telecommunication systems ONAT named after O. S. Popov and may be used to create regulations for the design and operation of xDSL- access networks.