Communication system, communication device, control device and communication control method

A communication system comprising:

• a first module configured to perform a first radio communication using a first channel and to detect a priority signal using the first channel;
• a second module configured to perform a second radio communication using a second channel different from the first channel and to detect a priority signal using the second channel;
• a memory that stores instructions;
• and
• a processor that executes the instructions,
• wherein the instructions cause the processor to perform:
• executing a first processing of changing the second radio communication to a non-restrictive state and a second processing of changing the first radio communication to a restrictive state when the priority signal using the first channel is detected in a state that the first radio communication is in the non-restrictive state and the second radio communication is in the restrictive state.

A control device for controlling a first module that performs a first radio communication using a first channel and detects a priority signal using the first channel and a second module that performs a second radio communication using a second channel different from the first channel and detects a priority signal using the second channel, the control device comprising:

• a memory that stores instructions;
• and
• a processor that executes the instructions,
• wherein the instructions cause the processor to perform:
• executing a first processing of changing the second radio communication to a non-restrictive state and a second processing of changing the first radio communication to a restrictive state when the priority signal using the first channel is detected in a state that the first radio communication is in the non-restrictive state and the second radio communication is in the restrictive state.