IMS Centralised Services:Voice services migration for a leading European telecom organization

Bachelor Thesis from the year 2013 in the subject Instructor Plans: Computing / Data Processing / IT / Telecommunication, grade: 1,0, University of Applied Sciences Technikum Vienna (Electronic Engineering), language: English, abstract: This bachelor thesis aims at providing an overview of the evolution process from the current circuit-switched (CS) voice services to those based on the IP multimedia subsystem (IMS). The timeline in question comprises the years 2013 to 2018 and takes into consideration three possible scenarios: one intermediate state and two target states, each of them presenting a particular setting in respect to the CS & IP domain mediation. Those states are subsequently evaluated according to certain predefined criteria. In addition, a complementary framework is given by the SWOT analysis which will consequently lead to the final recommendations for one of the leading European telecom organizations (the company in question is not disclosed throughout this thesis on purpose). Within this context, the major characteristics of the Austrian as well as European mobile markets are examined. Finally, the expected key assumptions and developments for the given timeframe are presented together with the particular findings of the topics previously described. As a starting point, the basic IMS architecture is presented together with its major features in respect to other current technologies. In a further step and based on the previous information, the key motivations for the transition from CS to IMS-based voice services will be discussed. In this sense, a service consistency delivered by centralized services on an access agnostic basis is assumed. For this purpose the initial state is evaluated regarding its three relevant levels: the transport/endpoint, session/control and application/service layers. Next, a more comprehensive approach, the intermediate state, is evaluated: here, the legacy SCP supports the CS&IP domain mediation via the IM-S