Patent ID: 6259685
Filing Date: 2001-07-10
Classification: H04W

Abstract:
A method for channel allocation in a mobile communications system having a time frame structure and including mobile stations, several base transceiver stations and cells defined by their radio coverage areas, whereby a set of channels is allocated for each cell, a set of carrier wave frequencies is allocated for use by each cell, a connection can be set up between a mobile station in the cell and a base transceiver station of the cell using a channel which uses some carrier wave frequency allocated for use by the cell and which is defined at least by a time slot in the time frame structure, and wherein transmission powers used by mobile stations and base transceiver stations can be adjusted, a maximum transmission power permissible on a channel being predetermined, said method comprising:allocating the carrier wave frequencies with a relatively dense reuse pattern;dividing cells using the same carrier wave frequencies into classes;in each class, allocating channels to cells belonging to the same class so that connections using the same channel simultaneously in different cells of the same class at the maximum transmission power would cause mutual interference to each other exceeding acceptable interference; and subsequentlyin each class, adjusting transmission powers of cells belonging to the same class and using the same channel on a time slot basis, so that, concerning each time slot, a transmission at the maximum transmission power is allowed only in one cell, and adjusting transmission powers of for each cell belonging to the same class to have an individual time slot basis transmission power limitation.