Patent ID: 7826852
Filing Date: 2010-11-02
Classification: H04W

Abstract:
1. A radio communication apparatus which communicates with a radio terminal device, the apparatus belonging to a first group, the device performing handoff between a plurality of apparatuses which belong to the first group, the apparatus comprising: a selection unit configured to select one block from a plurality of frequency blocks obtained by dividing a specified frequency band, the frequency blocks being continuous on a frequency axis; a first detection unit configured to detect an unused channel among a plurality of channels contained in the selected block; a second detection unit configured to detect an in-use channel among the channels when the unused channel is detected; a determination unit configured to determine whether a second group to which a device which is using the detected in-use channel belongs is the same as the first group; and an assignment unit configured to assign the detected unused channel as a channel for communication with the radio terminal device when the in-use channel fails to be detected or the determination unit determines that the second group is the same as the first group.