Browse Conferences
Dynamic spectrum allocation in a multi-radio environment: concept and algorithm
This paper discusses the concepts of dynamic spectrum allocation (DSA) as an alternative to fixed allocation schemes. The paper investigates a scenario where a block of spectrum is shared between a unicast system, such as terrestrial UMTS (...
Designing a diffserv-capable IP-backbone for the UTRAN
Due the growing popularity and availability of IP-devices and IP-transport, and given the evolving standardisation, it is clear that IP-transport will be one of the transport mechanisms in the UMTS Terrestrial Radio Access Network (UTRAN). ...
Its services in Wales using the Wireless Application Protocol (WAP)
This paper describes the UK site of the ITSWAP project which is developing ITS services using the Wireless Application Protocol (WAP). The site is situated in Wales and includes several key features aimed at improving travel using the poten...
Services via mobility portals
This paper examines the importance of mobility portal services and the technologies that will be essential in delivering content over next generation network technologies. Finally, proposed developments are discussed which will extend the f...
Modified WAP for secure voice and video communication
It is essential for future mobile communication systems to support different media types such as audio, video. There is also an increasing need to preserve the confidentiality, data integrity, and authenticity of these media to prevent frau...
CRUMPET: creation of user-friendly mobile services personalised for tourism
More and more people combine several purposes with travelling, such as business, leisure, entertainment, and education. Such people may not have time to pre-plan a travel schedule in detail. They need location-aware information about the de...
Towards a coherent approach to third generation system security
This paper provides an overview of a systematic approach to the definition of 3G security features. This is followed by a review of the disparate security technologies that may be employed in 3G systems. Some properties of a coherent 3G sys...
Performance of SIR-based power control for UMTS
The performance of SIR-based closed-loop power control (CLPC) for the W-CDMA UTRA-FDD uplink has been evaluated. The evaluation work has been carried out using the standard deviation of the power control error (PCE) as the performance metri...
Performance evaluation of power control algorithms in cellular UTRA systems
The CDMA based UMTS transmission technology in which all users simultaneously share the same common range of spectrum gets rather affected by the system interference. The reduction of interference is therefore a key issue in the development...
Performance of power-triggered and Ec/N0-triggered soft handover algorithms for UTRA
A dynamic adding and dropping thresholds based soft handover algorithm proposed for the UTRA system is evaluated through simulations. The simulations are carried out in an UMTS vehicular environment. Two possible handover triggering schemes...