Patent ID: 8521225

Claim:
A communication system including a first terminal station which has a host function of controlling communication, and a device function controlled by the host function, and a second terminal station which operates by the host function, the second terminal station comprising: a determination unit configured to determine whether a connected terminal station is the first terminal station; and a control unit configured to, if the terminal station determined to be the first terminal station by said determination unit has acquired no communication band yet when starting an operation by the host function, assign at least part of a communication band acquired by the second terminal station to the first terminal station, and the first terminal station comprising: a host unit configured to operate by the host function when the first terminal station connected to the second terminal station by the device function has received a connection request from a third terminal station which operates by the device function; an acquisition unit configured to, when starting an operation by the host function, acquire the communication band assigned by the second terminal station as a communication band for the third terminal station; and a request unit configured to, when starting an operation by the host function, request the second terminal station to assign a communication band, if a communication band to be used for communication with the third terminal station cannot be acquired, and said control unit assigns at least part of the communication band acquired by the second terminal station to the first terminal station in response to the connection request from said request unit.