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With VoIP services becoming more and more popular and, even beginning to compete with the PSTN (Public Switched Telephone Network) in terms of prices and wide use, companies that provides this service has to evolve to keep their customers and be competitive.
The BSA’s (Business Software Alliance) global study shows that 35% of all packaged software in use 2006 was illegal. The estimated loss due to software piracy was 40 billion dollars. It is therefore important for software companies to protect their software against
This Master thesis investigates solutions for handling congestion in All-IP radio networks. A mixed traffic scenario including a video and voice conversation has been studied using an advanced radio network simulator. The preventive measures investigated in this thesis are a bit rate
In recent years, mobile communication has evolved rapidly and demand for mobile devices with new and higher quality services is increasing. The existing 3G standard, Universal Mobile Telecommunication System (UMTS), is currently being upgraded with High Speed Packet Access (HSPA) to meet
We introduce several network design and planning problems that arise in the context of commercial satellite networks. At the heart of most of these problems we deal with a traffic routing problem over an extended planning horizon. In satellite networks route changes
We present a study of two NP-hard telecommunications network design problems – the prize-collecting generalized minimum spanning tree problem (PCGMST) and the design of optical networks with wavelength division multiplexing. The first problem, the PCGMST problem, involves the design of regional backbone
This dissertation seeks to answer the following research questions: (1) what properties enable some organizations to generate more value from information technology (IT) than others? and (2) through what mechanisms do organizations generate value through IT? It examines the role of technology
Since the introduction of Napster in 1999, Peer-to-peer applications has generated controversy through providing users with tools for sharing files, which has resulted in a large increase of traffic in fixed networks while raising piracy issues. In recent years, other application areas
The area of mobile communications has evolved in the last years and with the introduction of 3rd generation cellphones users can use features like video calls and mobile television. There are various bottlenecks in this kind of communication that introduce distortions to
This thesis explains how to create a software for IP fail-over which also supports migration of TCP and SCTP states. Initially existing solutions for TCP-state transfer were studied to see if they could be built on but after the investigation was done