Method for controlling a diversity of multi-carrier CDMA systems in cellular environments

摘要

The present invention relates to a cellular mobile communication system, and more particularly to a diversity control method for controlling forward link power of multi-carrier CDMA (Code Division Multiple Access) system in cellular environments. ;A method for controlling a frequency diversity of multi-carrier CDMA systems in cellular environments according to the present invention, comprises controlling the number of carriers in a forward and a reverse links according to a strength of a signal and a distance between a base-station and a mobile terminal. ;The diversity control method complementarily uses frequency diversity control method for controlling the number of the carriers according to the distance between the base-station and the mobile terminal and power control method for controlling transmission power according to the distance. Preferably, a power control method for controlling a transmission power according to said distance can be complementarily used in a region using the same number of carriers. It is also preferred that additional carriers can be allocated from an adjacent base-station in the case of high transmission rate of base-station signal or poor signal state.