Measurement based quality of service control for communications networks

摘要: This thesis presents a purely empirical approach for the estimation of effective bandwidth aggregated traffic flows, suitably accurate use within engineering based network performance optimisation strategies, such as QoS-aware planning and admission control. The algorithm proposed, is an off-line approach, which uses packet trace collected from processes it through FIFO queue. Based on queue buffer analysis, appropriate service rate that ensures stated QoS targets delay are maintained chosen to represent trace. evaluated in two scenarios. first cost efficient process establishing network-wide demand matrix available accounting data. We coefficients enhance planning. demonstrated be reasonably scenarios we consider, importantly at fraction operational capital expenditure would incurred by deployment operation direct measurement approach. Secondly, propose IPTV focussed control algorithms suitable optimising utilisation while maintaining admitted traffic. employs simple evaluation whether there sufficient ensure, with degree confidence, will not violated if requested ow admitted. second utilises information relating cost, duration request frequency specific content prioritise flows maximise revenue.