Integration of micro and macro cellular networks for future land mobile communications

This paper proposes a system of integrating micro and macrocell for future land mobile communications which allows the user to enjoy mobile communications services, regardless of terminal speed, using one terminal. Current and developing digital land mobile communications systems are classified into two categories according to their differences in cell size, operating environments, service requirements and terminal speeds. One is a microcell system offering cordless telephone services for the user moving at low speeds and the other is a macrocell system offering vehicle telephone services for the user moving at high speeds. In order to access these two systems, the user needs to prepare two different terminals and use the appropriate one according to the operating environment, service requirements and terminal speed. This paper proposes a land mobile communication systems in which the user can place a call without any of the inconvenience described above. This system consists of multi-layered macrocells each of which is composed of a number of microcells. This paper presents the detailed structure of this system and evaluates its channel capacity based on computer simulation results.