Browse Conferences
Performance evaluation of dynamic data rate adaptation on the UMTS dedicated channel
We show the performance of packet data transmission on the UMTS dedicated channel (DCH). For that purpose, a framework of rate adaptation procedures has been developed. It significantly improves the performance in terms of decreased outage ...
Performance analysis of antenna sectorisation in cell breathing
When traffic changes depending upon the behaviour of mobile subscribers, cell coverage range also changes. This phenomenon is known as "cell breathing". We discuss the concepts of cell breathing in a 3rd generation systems environment such ...
Optimising RRM algorithms via simulations
The paper describes two projects for optimising radio resource management (RRM) algorithm parameters using WCDMA dynamic simulations. The first project was conducted to determine the optimal QoS for different services. A series of simulatio...
Load based radio resource management for UMTS picocells
A common approach to UMTS radio resource management is to base decisions upon the uplink and downlink cell load. The cell load is typically generated from a combination of intracell and intercell interference. In addition to increasing the ...
Performance of scalable resource allocation using load prediction schemes for different traffic scenarios
Previous work was done to compare the static resource allocation (StRA) scheme and scalable resource allocation (ScRA) scheme within an integrated GSM and GPRS network (see Tang, S. and Tafazolli, R., Vehicular Technology Conference - Sprin...
Evolution to 3G services: provision of 3G services over GERAN (GSM/EDGE radio access network)
The first 3G systems are being installed, and coverage maps are showing that there are significant areas of the UK where some 3G services will not be supported. Thus, a mechanism must be provided for the future that allows operators with co...
Performance evaluation of MPEG-4 video telephony over UMTS
UMTS access networks can provide a wide range of bearer services with different levels of quality of service suitable for multimedia applications with bit rates of up to 2 Mbit/s. These multiple services are managed by use of composite tran...
Messaging in a 3G world
Messaging is now used billions of times a day to communicate person to person and person to application. Yet despite the success, the number of messaging technologies presents problems for users and potentially inhibits even larger take-up....
Comparison of space-time architecture performance for UMTS under time-varying Rayleigh fading channel
Recent advances in space-time signal processing have enabled the realization of multiple-input multiple-output (MIMO) communication systems. It is highly probable that MIMO architectures will be important contenders for the next generation ...
Utility-based distributed geographic load balancing in mobile cellular networks
The paper describes a new approach to geographic load balancing in mobile cellular networks with fully adaptive antennas. Our previous work using cooperative negotiation and semi-smart antennas has been shown to be very effective, however, ...