Communication device and communication method

A communication method for performing wireless communication by a first communication device, comprising:

• receiving, within a first, predetermined, interval a signal from a third communication device when communication between the first communication device and a second communication device is already established;
• calculating a time until communication between the first communication device and the third communication device can begin, the calculated time being immediately after communication between the first communication device and a second communication device ends;
• and
• transmitting a coupling request signal including the information of the time when communication between the first communication device and the third communication device can occur so as to establish the communication with the third communication device.

A first communication device that performs wireless communication with at least a second communication device and a third communication device, comprising:

• a communication control unit that, when the first communication device is in communication with the second communication device, and receives a request to communicate with the third communication device from the third communication device:
• determines the time period during which communication between the first communication device and the second communication device can occur;
• sets, as the beginning of a time period during which communication between the first communication device and the third communication device can occur, a time no sooner than the time period during which communication between the first communication device and the second communication device can occur ends;
• and
• transmits a coupling request signal including information concerning the time until the beginning of the time period during which communication between the first communication device and the third communication device begins so as to establish communication with the second communication device.