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Two structures of the conceptual presentation are considered and an analytical method for converting the presentations, along with corresponding additive and multiplicative metrics, is proposed. A corresponding analytical model is elaborated, which allows the prediction of flow-, time-, and traffic characteristics of terminals and users, as well as the overall network performance. In accordance with recommendations of the International Telecommunications Union\u2019s Telecommunication Standardization Sector (ITU-T), analytical expressions are proposed for predicting four QoS indicators. Differentiated QoS indicators for each subservice, as well as analytical expressions for their prediction, are proposed. Overall pie characteristics and their causal aggregations are proposed as causal-oriented QoS indicators. The results demonstrate the ability of the model to facilitate a more precise dynamic QoS management as well as to serve as a source for predicting some Quality of Experience (QoE) indicators.<\/jats:p>","DOI":"10.1007\/978-3-319-90415-3_7","type":"book-chapter","created":{"date-parts":[[2018,5,24]],"date-time":"2018-05-24T17:12:54Z","timestamp":1527181974000},"page":"151-181","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Conceptual and Analytical Models for Predicting the Quality of Service of Overall Telecommunication Systems"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1564-1551","authenticated-orcid":false,"given":"Stoyan","family":"Poryazov","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6768-7340","authenticated-orcid":false,"given":"Emiliya","family":"Saranova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0535-7087","authenticated-orcid":false,"given":"Ivan","family":"Ganchev","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2018,5,25]]},"reference":[{"key":"7_CR1","unstructured":"ITU-T Recommendation E.800: Definitions of terms related to quality of service, September 2008"},{"key":"7_CR2","doi-asserted-by":"publisher","unstructured":"Martin, V., Zwickl, P., Reichl, P., Xie, M., Schulzrinne, H.: From Service Level Agreements (SLA) to Experience Level Agreements (ELA): the challenges of selling QoE to the user. 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