Patent ID: 8583153
Filing Date: 2013-11-12
Classification: H04W

Abstract:
1. A radio communication system comprising at least: a first base station that has a first coverage area; and a second base station that has a second coverage area, said first and second base stations being capable of communicating with each other via a wired line wherein each of said base stations performs usage frequency resource sharing control by putting weight on, or selecting from, transmission powers of frequency resources generated by dividing a radio resource into a plurality of radio resources, and when said second base station judges that, based on a received-signal quality report result received from a mobile terminal, said first base station causes interference to said second base station, said second base station decides an interference power threshold to be notified to said first base station and notifies the interference power threshold to said first base station, the interference power threshold determined based on a transmission power setting value of said first base station, a transmission power setting value of said second base station, and an estimation amount of interference that said first base station causes to said second base station, the estimation amount calculated from a report result from said mobile terminal, said first base station transmits information to said second base station, the information indicating a comparison result between transmission powers of said plurality of frequency resources and the interference power threshold, and based on the comparison result, said second base station selects a frequency resource, unlikely to be affected by interference from said first base station, for communication with the mobile terminal.