Dimitrios Kagklis

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Voice over IP offers important opportunities for the telecommunications market to deploy more advanced services, but it must overcome many obstacles. Users expect toll-quality voice, which calls for end-to-end quality of service (QoS) - a challenge for IP service providers. To make VoIP attractive to end users, the only feasible and directly implementable(More)
Although QoS provision has been researched extensively for B-ISDN (ATM based) networks and it is also under research for IP networks (Internet), until recently there was no real service environment to provide such QoS to end users. Demonstrators and laboratory experiments aimed mainly at proving specific technologies and architectures. Recent advances in(More)
Recent advances in broadband technology have resulted in the emergence of a new DSL standard, the ADSL2+. This new technology is designed to offer almost three times the downstream rate offered by the current ADSL technology, accompanied by a substantially increased upstream rate, at the same time providing backward compatibility with existing Customer(More)
Internet Protocol-based applications are the prevailing trend of the telecommunications market, but the path towards the "IP over everything" target is not unhampered. The main shortcoming of the IP protocol is its incapability of providing guaranteed Quality of Service (QoS), although significant effort is spent within different standardization bodies and(More)
The increasing demand for converged media services across Europe promotes the deployment of a range of broadband network technologies. Existing and emerging services that become available to the end user are currently supported by wireline access technologies such as relatively limited capacity cable modems, and ADSL or high capacity FTTx/VDSL as well as(More)
As content providers turn their attention towards the residential market, offering triple-play services over the expanding broadband access network, it is necessary to guarantee appropriate levels of quality. However, provisioning such services over a heterogeneous network is facilitated by adopting a common ‘language’ of defining quality policies. In this(More)
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