IMS (IP Multimedia Subsystem) presents a variety of services and features to meet the needs and expectation of subscribers. This variety of choices presents risks of retrieving non oriented services while responding to subscriber request. This may be due to similarities between services and to the huge amount of available services. In addition to service information, it is possible to extract and explore subscriber information in IMS network. Thus, it becomes interesting to consider, besides of request details, subscriber profile information in service discovery process. This paper presents an overview of our model and its mechanism based upon IMS architecture which provides service discovery combined with proactive service exposure to better respond to subscribers' needs and expectations. The results show improvement of usual state of the art models on several axes.