Lila Dimopoulou

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While handover management has traditionally used radio-technology-specific mechanisms, the need for integration of this diverse network environment has obviated the "push" of the handover functionality to the generic IP layer that serves the rendezvous point of underlying technologies. In this context, we study and analyze the implications of the link-layer(More)
IP technology will play a key role in beyond 3G systems, which face the great challenge of integration so as to provide seamless services to users anywhere and anytime. Apart from its natural role as a unifier, IP also comprises the main drive for network evolution towards all-IP network infrastructures. In this regard, we exploit IP as an enabler for the(More)
The provisioning of quality of service guarantees over a region spanning multiple administrative domains is nowadays one of the most basic and crucial issues. A scalable and efficient end-to-end QoS architecture is indispensable for ensuring the desired QoS guarantees to QoS-aware services. Towards this end, this paper introduces a scalable inter-domain(More)
The support of multicasting as a network layer service poses stringent requirements to next generation mobile networks. But for the fact that IP Multicasting has been considered in wireless networks, not until recently has there been a first attempt for the Multimedia BroadcastlMulticast Service (MBMS) support in UMTS. The investigation of MBMS(More)
This paper describes the architecture and the required mechanisms for the support of IP Multimedia Services within a Satellite Environment. While being based on the UMTS IP Multimedia Subsystem (IMS), which is currently being standardized by 3GPP for UMTS Release 5, the satellite environment as well as the supported features of the provisioned services(More)
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