Mobile Services

Services are expected to achieve a good balance between superior cost performance and a high degree of satisfaction. Network operators should estimate service and system performance not only from the perspective of engineering but also from the user´s point of view. The aim of our evaluation is to find a method for quantitative analysis of factors affecting subjective quality assessments. Many factors are assumed to affect mobile service quality. We chose three factors-application classification, place of use, and degree of relaxation-from a network design perspective. However, it was difficult to consider such factors in a traditional laboratory experiment. We developed an evaluation system for a field experiment with a large number of participants under controlled waiting time conditions. The system allowed the consideration of new factors and the quantitative estimation of their effects using a statistical evaluation.