Abstract
Today, increasing of the transmission rate in a telecommunications network is possible in vari- ous ways. One of them is inverse multiplexing. The inverse multiplexer divides a data stream to multiple parallel channels. This principle not only allows to in- crease the total available transmission rate, but also al- lows to reduce the error rate and interruption in data stream. The digital subscriber line may be used for the implementation of the inverse multiplex. Accurate knowledge of the transmission parameters of a digital subscriber line and the entire infrastructure of the net- work provider is necessary for the eective functioning of the terminal device with inverse multiplexing. It is necessary to know not only the parameters related to the transmission rate, but above all the parameters relevant to the time characteristics of data transmission. This paper describes how to obtain the transmission parame- ters of real digital subscriber lines and their modelling.
Highlights
The increase of a transmission rate or the error-free data transmission in telecommunication networks can be done with the use of different methods
The results of previous tests have shown that the data stream of ADSL2+ or VDSL2 is not affected by the value of the transmission rate to 75 % or 90 % of Actual Net Data Rate
The Goodness-of-Fit test (Kolmogorov-Smirnov) confirmed that it was possible to model the packet delay variation parameters of ADSL2+ lines with the logistic distribution with Probability Distribution Functions (PDF) according to Eq (1): For ADSL2+ line it was found that the value of the maximum transmission rate Vpmax is equal to 89 % of the Actual Net Data Rate
Summary
The increase of a transmission rate or the error-free data transmission in telecommunication networks can be done with the use of different methods. The inverse multiplexer on transmit side divides a single data stream into multiple parallel data channels and the multiplexer on receive side puts together data from all channels to single data stream [1]. The inverse multiplexing requires installation of the special network element - multiplexer/demultiplexer (the Muldex) - one on the end user side and one on the service provider side. The Muldex is responsible for the proper packets dis-. The picture shows the parallel paths through two independent network providers presented by a dashed line. Two Muldex devices are placed on the user’s end and the service provider side [2]
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