Patent ID: 6684086
Filing Date: 2004-01-27
Classification: H04W

Abstract:
A radio base station apparatus comprising:an estimation section that estimates arrival directions of receiving signals from a plurality of communication terminals; a group dividing section that divides the plurality of communication terminals into a plurality of groups based on the estimated arrival directions of the receiving signals; an assignment control section that assigns a same scramble code to all communication terminals belonging under a same group; a calculation section that calculates a transmission weight to perform directional transmission to the plurality of communication terminals; and a directional transmission section that directionally transmits a transmission signal modulated with the assigned scramble code, using the calculated transmission weight, wherein: said calculation section calculates the transmission weight that is common to all the communication terminals belonging under the same group; and said directional transmission section performs transmission with a same directivity to all the communication terminals belonging under the same group.