Browsing by Issue Date, starting with "2006-04"
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- Enhanced UMTS Simulation-based Planning in Office ScenariosPublication . Cabral, Orlando Manuel Brito; Velez, Fernando José; Hadjipollas, George; Stylianou, Marinos; Antoniou, Josephina; Vassiliou, Vasos; Pitsillides, AndreasEnhanced UMTS traffic characterisation parameters have been addressed for the offices scenario. By using a system level simulator, results concerning QoS measures as packet delay, blocking and handover failure probabilities have been obtained. If the cell radius decreases and the number of BSs increases the blocking probability decreases with a linear trend. One concludes that the supported traffic and the corresponding throughput significantly increase when the cell radius decreases. However, increasing system capacity by decreasing the cell radius causes an increase in the intensity of handovers and a decrease in the throughput per BS. Hence, optimum values for the coverage distance will correspond to higher cell radius. Delay and delay variation are not a limitation.
- Optimisation of Enhanced UMTS Cellular Planning Based in Economic AspectsPublication . Franco, Catia; Rei, Ricardo; Cabral, Orlando Manuel Brito; Velez, Fernando J.Based in a definition of simulations scenarios, traffic behaviour, and QoS (quality of service) aspects, a SLS (system level simulator) is used for obtaining system capacity results for urban and business city centre (BCC) scenarios, when overload conditions are considered. Optimum values of the cell coverage distance that maximise the profit per unit length (in BCC) or by unit area (urban) were found. For prices of 5 and 7 Euro cents/MB, while in urban scenarios, optimum values of 20 and 70 %, respectively, were found for profit (for coverage distances of 217 and 621 m), in BCC, optimum values occur around 240 m, and are 80 and 150 %, respectively.