This paper describes the implementation of a real-time UMTS demonstrator developed within the framework of the IST ARROWS (Advanced Radio Resource Management On Wireless Services) project. Among the main goals of the ARROWS demonstrator are the evaluation of radio resource management strategies in a UMTS network and the analysis of the impact that these strategies have on the end-to-end behavio...

Wireless community these days debate frequently about convergence (next generation) network, a wireless system that is likely to appear after the successful deployment of the current third-generation (3G) systems. Towards convergence of various wireless networks, the integration of universal mobile telecommunication system (UMTS) and wireless local area network (WLAN) plays a major role. Enhanc...

In this paper a handover functional model and corresponding functionality description in SDL for the IN/UMTS concept for third generation mobile systems protocol development is presented. The model is based on ETSI NA-61301 [1] handover functional model. The main focus is on the introduction and specification of necessary Functional Entities for control and execution of the switching function f...

In this paper, we introduce a framework for the adaptive control of universal mobile telecommunications system (UMTS) networks in order to improve bandwidth utilization of the radio channels. The key contribution of the paper constitutes the introduction of a performance management information base for dynamically adjusting the packet scheduler and admission controller. Thus, the adaptive contr...

Universal Mobile Telecommunications System (UMTS) is a third-generation mobile communications system that supports wireless wideband multimedia applications. This paper investigates the video quality attained in streaming MPEG-4 video over UMTS networks using an integrated tool environment, which comprises an MPEG-4 encoder/decoder, a network simulator and video quality evaluation tools. The be...

A time-domain technique for fading depth characterisation in wideband Rayleigh and Ricean environments is proposed. New expressions for the probability functions of the received power, which apply to both Line-of-Sight and Non-Line-of-Sight cases, are derived. The fading depth for continuous and discrete channel models is evaluated as a function of the Rice factor, and the product between the s...

This paper investigates the power saving mechanism of Universal Mobile Telecommunications System (UMTS). UMTS discontinuous reception (DRX) is exercised between the network and a mobile station (MS) to save the power of the MS. The DRX mechanism is controlled by two parameters: the inactivity timer threshold tI and the DRX cycle tD . Analytic analysis and simulation model are proposed to study ...

This paper describes the application of a joint source channel decoding technique (JSCD) of variable length codes (VLCs), presented at first by Guivarch et al., in the context of future public land mobile telecommunication systems (FPLMTS) involving UMTS channel codes and OFDM modulation. OFDM parameter sets have been adjusted both to the UMTS chip rate and to the selectivity of the urban multi...

proposed IP multicast for third generation Universal Mobile Telecommunication System (UMTS) Broadband wireless networks. In their proposed approach, multicast messages are sent as multiple unicast messages to all active multicast group members in the UMTS network. As a result their proposed scheme is inefficient in terms of internal infrastructure and radio resource usage; and multicast packets...

With more and more users subscribing to wireless broadband services, it is desirable for them to have access to both WLAN and UMTS networks. We study globally optimal user-network association in an integrated WLAN and UMTS hybrid cell. The association problem is formulated as a generic MDP (Markov Decision Process) connection routing decision problem. In the formulation, mobile arrivals are ass...