Patent ID: 7620002

Claim:
In a radio communication system where there are a plurality of sets of radio communication apparatuses that perform spatial multiplex transmission to one or a plurality of terminals and geographical areas where communication with one of the radio communication apparatuses is possible, the radio communication apparatuses being interconnected via a network, a controller of multiplex number in spatial domain that controls the multiplex number in spatial domain of each radio communication apparatus, comprising: a traffic information gathering unit which collects traffic representative values indicating traffic conditions of each of the radio communication apparatuses, the traffic representative values including the number of terminals communicating with each radio communication apparatus; a traffic record unit which records the traffic representative values and values of the multiplex number in spatial domain for each of the radio communication apparatuses; a traffic evaluation unit which evaluates the traffic representative value of each radio communication apparatus, based on the traffic representative values of a plurality of radio communication apparatuses; a multiplex number decision unit which determines a value or values of the multiplex number or multiplex numbers in spatial domain for one or a plurality of radio communication apparatuses according to the number of terminals communicating with each radio communication apparatus included in the traffic representative values; and a multiplex number notification unit which notifies each radio communication apparatus of the multiplex number in spatial domain determined by the multiplex number decision unit.