Patent ID: 8891417

Claim:
A radio communication system capable of communicating with a plurality of user devices, comprising: a base station apparatus connected to a plurality of antennas and a controller which selects one or more antennas of the plurality of antennas to be in an antenna group based on a quality of communication performed between the base station apparatus and one or more user devices of the plurality of user devices and based on a number of antennas within the antenna group, wherein one antenna group comprised of selected antennas is configured for each of the user devices of the plurality of user devices for communication, a first antenna group comprised of selected antennas is configured for a first user device of the plurality of user devices for communication, the controller adds or removes a first antenna to/from the first antenna group based on whether the communication quality between the base station and the first user device through the selected antennas within the first antenna group is within a range defined by a lower limit of a required value and an upper limit of the required value of the communication quality, and the base station apparatus communicates with the first user device using at least the selected antennas of the first antenna group.