This paper analyzes the performance of the capacity controlled radio system under a frequency selective fading environment. This system controls the number of modulation levels according to the number of active subscribers. In the analysis, we consider the capacity controlled system either with or without adaptive equalizer. As the results of analysis, it is clarified that the system is superior to the conventional fixed capacity system, and can be considered as a good countermeasure for multi-path fading. And it is found that there exists a synergistic effect due to capacity controlling and adaptive equalizing.

A location registration/paging procedure which is free from location registration area design is proposed. Each base station (BS) broadcasts a "responsibility area", composed of its own and neighboring cells' identification (ID). A mobile station (MS) makes a new location registration request when the current BS's responsibility area does not include the MS's registered location. Each BS is allowed to decide its own responsibility area autonomously based on route information, which is composed of neighboring cells' ID and reported from MSs. Therefore, the responsibility area can be adaptively changed based on MSs' moving characteristics. Moreover, this procedure solves the problems of registration traffic concentration and excess registration request on boundary BSs.