A radio channel allocation apparatus of a node in a radio communication
system which controls to allocate a radio channel between nodes by a
virtual carrier sense is disclosed. The radio channel allocation
apparatus includes a node information collecting unit which collects
information of a neighboring node to which the node can directly transmit
data, and a radio channel determining unit that determines a radio
channel, which is allocated to a communication link between a node which
has transmission inhibition conditions and another node which does not
have the transmission inhibition conditions by communications between
predetermined nodes. The determined radio channel is a different radio
channel from a radio channel between the predetermined nodes, based on
node information of the node and the neighboring node.