Josephine Antoniou

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In next generation communication networks, multiple access networks will coexist on a common service platform. In cases where network resource planning indicates that individual access network resources are insufficient to meet service demands, these networks can cooperate and combine their resources to form a unified network that satisfies these demands.(More)
MBMS bearer services can be provided in each cell by either Point-to-Point or Point-to-Multipoint transmission mode but for efficiency a decision has to be made between the two approaches. Initially, the fundamental criterion used to make this decision was the number of MBMS users in a cell (UE Counting). In this paper we extend our previous work, which(More)
Third generation and beyond mobile networks have brought about a demand for new services that refrain from the traditional unicast communication model. These are services demanding transmission to many receivers with acceptable efficiency and quality. In such networks radio resource management is a set of mechanisms responsible for maintaining quality of(More)
This paper presents a new system level simulator that has been developed to evaluate E-UMTS (Enhanced Universal Mobile Telecommunication Systems) 3G Networks. The article describes how the simulator supports different mobility, propagation, and traffic generation models and how this simulation framework can be used to evaluate new protocols, algorithms, or(More)
– The paper proposes a new simulator that supports UMTS and Enhanced-UMTS performance evaluation. Existing UMTS simulators integrate link-level and system-level simulators, implemented using time-based simulation techniques. The proposed simulator integrates time-based link level simulations into an event-based system level simulator by extending ns-2. The(More)
Efficient network support of real-time group communications requires dedicated multiparty networking technologies, such as IP multicast, to send the same content simultaneously to multiple receivers, with intermediate routers duplicating packets as needed. The increasing popularity of group applications introduces new technical challenges to meet the users'(More)
The paper addresses the issue of achieving context-aware, adaptive multiparty sessions in a heterogeneous system by illustrating how to add elements of adaptivity and context-awareness to the session management functionality of such systems. The effective usage of situation/context information can lead to context-aware content casting, especially(More)
—Future networks are envisioned to satisfy the user needs and improve their quality of experience. This requires the networks to support context-aware information, where context of the user, session, network and environment will greatly influence the way the session is delivered: new approaches are required to deal with the overall context information and(More)