Abstract
Nowadays, in the EU a lot of project concerning broadband access to the Internet for end users is being developed. The aim of those projects is to support the creation of access communication networks that can meet defined performance criteria for providing the broadband services. Such networks are in general called Next Generation Access. One of the first tasks is to identify appropriate transmission technologies that could meet the required performance criteria. For each transmission technology, it is necessary to carry out a detailed performance analysis of the transmission depending on certain transmission conditions. To perform a detailed analysis means to carry out modelling of transmission’s specific conditions for each technology. This article, specifically, discusses hybrid optical networks, which in conjunction with digital subscriber lines are one of the possible solutions for Next Generation Access. In the access network topology that combines copper and optical cables, it is necessary to optimize the mutual ratio of both infrastructure’s length. Therefore, the article also describes this issue that refers to a certain technology for the Next Generation Access. Specific performance criteria of transmission for access network in the Czech Republic are considered and the optimized location of the external node digital line access multiplexer is discussed.
Highlights
Technology development and public demands of Internet services determinate Generation Networks allows broadband/high-speed Internet access with downstream transmission rate up to 100 Mbps
Principle of the Vectored DMT modulation (VDMT) modulation lays in idea to adjust transmitted signal in such a way, that after it goes through the subscriber line, where it is influenced by the crosstalk disturbance and cable attenuation, it could be well detected on reception side without problems
Creating fully optical networks FTTH and FTTB is still hindered by high investment costs
Summary
In the Czech Republic (according to the „National plan for the development of generation networks” document), NGA network is a network that meets the following two performance criteria: Keywords. FTTx, hybrid access network, generation access, transmission performance, xDSL. Allows high-speed Internet access with downstream transmission rate of at least 30 Mbps. This objective is intended for existing upgraded communication infrastructures for broadband Internet access. For improved networks there is an assumption that optical elements will be used at least partially,
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
