Abstract
The digital subscriber lines are still base of access network to provide Internet connectivity to the public. The transmission capacity is continually increased and performance of digital subscriber lines must be estimated for network provider use. This paper describes two ways for correction of digital subscriber line modelling. The resulting bitrates are calculated with respect to the length of the line and the number of disturbance sources. The article brings new ideas for simulations and calculations of transmission function for line with inhomogeneity and calculations new value of code gain.
Highlights
The spectral profile 998ADE17 was chosen for VDSL2 lines operating in the access network owned in the Czech Republic [1]
The VDSL lines are widely used for the transmission video-streams of IPTV (Internet Protocol Television)
Two major problems were identified with precision modelling of digital subscriber lines on the physical layer
Summary
In May 2011, installation of VDSL2 (Very-high-speed digital subscriber line) was started by Telefonica Czech Republic. The code gain is depended on a vendor and its error correction and equalization algorithms implementation Both problems are described and analysed in this article and practices are recommended to address them. G Inhomogeneities of type 3 – they originate from disobedience of rules for connecting groups (bundles) and layers (positions). This classification is, insufficient for digital subscriber lines that occupy the frequency bands up to tens of MHz, and it is desirable to introduce the classification according to Table 1. Type 2 inhomogeneities, on the other hand, have the nature of impedance faults, and they should be eliminated by manufacturing and installing; if they occur, the affected cable elements cannot be used for transmission. Type 5 is linked to additional elements in the access network, such as patch panels, distribution frames, splitters, etc
Sign-in/Register to view highlights & summary 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 callMore From: Communications - Scientific letters of the University of Zilina
Disclaimer: 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.
