Skuola Screenshot Piece Christos Bouras is Professor in the University of Patras, Department of Computer Engineering and Informatics. Also he is a scientific advisor of Research Unit 6 in Computer Technology Institute and Press - Diophantus, Patras, Greece. His research interests include Analysis of Performance of Networking and Computer Systems, Computer Networks and Protocols, Mobile and Wireless Communications, Telematics and New Services, QoS and Pricing for Networks and Services, e-learning, Networked Virtual Environments and WWW Issues. He has extended professional experience in Design and Analysis of Networks, Protocols, Telematics and New Services. He has published more than 450 papers in various well-known refereed books, conferences and journals. He is a co-author of 9 books in Greek and editor of 2 in English. He has been member of editorial board for international journals and PC member and referee in various international journals and conferences. He has participated in R&D projects.

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Cost analysis is currently a somewhat controversial set of methods in program evaluation. One reason for the controversy is that these terms cover a wide range of methods, but are often used interchangeably. In mobile research we use this term in order to describe a process that includes all the costs in a mobile deployment. For example, a cost analysis of the MBMS service is investigated based on the transmission cost over all the interfaces and nodes of the LTE architecture. During the evaluation, we take into account the total transmission cost that consists of the packet delivery cost at the network nodes and interfaces and the cost for control procedures

In a cost analysis procedure, it is critical that an effective metric will be chosen so that all the important parameters will be included. The cost metric used in the study for the MBMS service in LTE, includes the telecommunication cost for both packet deliveries and control signal transmissions. Based on the e-MBMS operation an analysis is performed for each type of cost that has to be taken into account for the calculation of the total telecommunication cost for the entire session.

In this case, the cost analysis includes the following parts of the total telecommunication cost:

  • Polling cost
  • Air interface cost
  • Core network cost
  • Synchronization cost