The next-generation mobile communication, the so called fourth generation, is a system capable to provide a variety of multimedia services such as multimedia moving pictures, movies, and television broadcasts with high-speed and high quality via the converged network of wireless and wired infrastructures. However, the next generation mobile services have not been studied actively yet because there is no clear definition what the next generation mobile communication and its services will be. In this paper, we exploit a perspective of the next generation mobile communication services and its characteristics. We then propose a service analysis framework for eliciting key service functionalities and core technologies when various future mobile service scenarios are given. The proposed analysis framework, called scenario based service analysis process (2SAP), consists of 4 sequential analysis steps, a scenario transformation, a scenario decomposition, an analysis of functions for each situation, and an elicitation of service functionalities