An intelligent radio resource management scheme for multilayered cellular system with different bandwidths

This paper proposes a spatially distributed control scheme for a multi-layered cellular system to achieve flexible and high capacity wireless communication systems under any traffic conditions including nonuniform traffic conditions. In the proposed system, terminals with lower mobility are connected to the wideband microcell systems to support a variety of services including high bit rate data transmission, and terminals with higher mobility are connected to the narrowband macrocell systems to reduce intercell hand-off frequency. To flexibly cope with temporal and spatial variations of traffic conditions, the ratio of the microcell and macrocell terminals as well as system bandwidths are adaptively and autonomously shared by both systems, and its control is conducted by each base station of microcells. Computer simulation confirms that the proposed scheme can achieve lower blocking probability than the centralized scheme under nonuniform traffic conditions due to its spatially distributed control.