Service Utility Optimization Model Based on User Preferences in Multiservice IP Networks
Hajer Derbel, Nazim Agoulmine, Mikaël Salaün · 2007
The optimization is an essential process for operators to ensure the best networks performance as well as an adequate return on investment. In the case of a multiservice IP network, this process consists on providing high-quality services to end users with the aim of maximizing their satisfaction. To achieve this goal, we propose an analytical model to quantify the Quality of Experience (QoE) parameter that evaluates the perceived service quality as well as the user satisfaction level. This model aims to optimize services utility according to the user preferences and the available bandwidth. It consists on evaluating: i) the estimated user's utility function according to the user's available bandwidth, ii) the network delivered utility function and finally iii) the QoE and the service cost. We define also a recursive process that allow to auto-adapt the services utility for the end users by adjusting the service importance parameter. Finally, in order to validate our proposed model and the service utility adaptation process, we carried out a set of simulations that we describe in the last section of this paper.