Patent ID: 8320310
Filing Date: 2012-11-27
Classification: H04L,H04W

Abstract:
1. A method for receiving channel state information feedback back by a base station in a communication system using Space Division Multiple Access, the method comprising: grouping mobile stations into at least two groups; monitoring channel state information fed back through a first feedback channel from mobile stations included in a first group different from a second group; allocating a second feedback channel, over which channel state information is to be fed back, to semi-orthogonal mobile stations having a semi-orthogonal relationship with mobile stations included in a first group of the two groups among mobile stations included in a second group of the two groups and the second group is different from the first group; receiving channel state information fed back from the semi-orthogonal mobile stations through the second feedback channel; and selecting at least one mobile station satisfying a semi-orthogonal criterion to the mobile stations included in the first group from among the semi-orthogonal mobile stations that feed back channel state information through the second feedback channel.