The communication terminal comprises a first radio unit for making radio communication
with a base station over a first radio channel having a first radio frequency band,
and a second radio unit for making radio communication with another communication
terminal by using a second radio channel having a second radio frequency band.
A first channel establishing section establishes the first radio channel to the
base station through the first radio unit. A second channel establishing section
establishes the second radio channel to the another communication terminal through
the second radio unit. A control section connects the base station to the another
communication terminal over the first and second radio channels.