Evaluation of the Efficiency of the VDSL2 Technology Implementation on the PJSC «Ukrtelecom» Network

The work is devoted to the research of achievable data transmission rates by transmission systems using VDSL2 technology (VDSL2-systems) when working on multi-pair telephone cables of the PJSC «Ukrtelecom» network. The architecture of the modernized telecommunications network of the PJSC «Ukrtelecom» is considered. The results of the experimental research of the achievable transmission rate of the transmission systems using VDSL2 technology for multi-pair telephone cables after the access network of the PJSC «Ukrtelecom» modernization, taking into account the crosstalk that occurs du­ring the parallel operation of the VDSL2-systems and the availability of the ADSL2+-systems working in the multi-pair cable, are provided. Analytical modeling of the VDSL2-systems operation taking into account the characteristics of the «Huawei» equipment and domestic telephone cables is performed. The method for calculating of the transmission rate of the VDSL2-systems has been corrected on the basis of the experiments and modeling results. Using the corrected method, the research of the VDSL2-systems transmission rate dependence on the length of the subscriber line, the load coefficient of the multi-pair cable by transmission systems and the external additive noises level is carried out. The recommendations on the implementation of the VDSL2 technology on the PJSC «Ukrtelecom» network based on the results of the research are given.