Doru Todinca

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This work proposes a new admission control algorithm for GPRS/EGPRS networks. The cellular networks are evolving from the 2 generation voice systems to 3 generation data and voice systems, and the classical admission control methods used for voice systems cannot efficiently cope with the new problems posed by the complex nature of data traffic and by the(More)
Mobile telephone systems are undergoing a substantial change from voice based systems which also support data transfer to become systems which truly support packet switched data services to mobile subscribers. This evolution towards the third generation (3G) mobile system will be based on the Global System for Mobile communications (GSM) [1] and will begin(More)
The goal of this paper is to investigate the efficiency of different algorithms used for resource allocation in data transfer over EGPRS networks. The focus is on the efficiency during congested periods in order to ensure reduced file transfer delay. A number of algorithms are presented for the resource allocation, and some generic mathematical results are(More)
This article proposes an approach for including user preferences and quality of service characteristics in the selection process of services. Our approach consists of a Domain ontology for the service description vocabulary, and a trader that facilitates user-preference-based service selection, combining imperfect service matching and ranking algorithms.(More)
Recent technological improvements have made the deployment of small, inexpensive, low-power devices (nodes), which are capable of local processing and wireless communication, a reality. Such structure is called Wireless Sensor Network (WSN). Nowadays, a WSN node may include complex sensing devices like video cameras. This paper proposes a new routing(More)
In the heterogeneous mobile networks of the future, the mobile users, equipped with multi-mode terminals, will be able to select the radio network that suits best the needs of the mobile user and of the applications running on the mobile terminal. In this work we propose a novel network selection algorithm based on fuzzy inference. Our algorithm permits a(More)
The evolution of European mobile communication systems towards the third generation (3G) is based on GSM (Global System for Mobile communications) [1]. A first step in the evolution is the General Packet Radio Service (GPRS) [2], [3], which truly supports packet switched data services. Our goal is to investigate the efficiency of different algorithms used(More)
It is generally considered that the wireless networks of the future will consist of several radio access technologies. In this context, the vertical handover (VHO) decision algorithms will increase in importance and in complexity, and the study of these algorithms becomes a hot research topics. In this work we propose a high-level OMNeT++ framework that(More)