A communication control method of a control node that controls communication by a secondary usage node operating secondary systems on a frequency channel allocated to a primary system, the method including:

acquiring parameters to calculate coverage of the secondary systems from the secondary usage node;

calculating the coverage of the secondary systems using the acquired parameters; and

notifying a detection node that detects neighboring secondary systems of the secondary systems, of coverage information representing the calculated coverage of the secondary systems.

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A communication control system, including:

a secondary usage node that operates secondary systems on a frequency channel allocated to a primary system;

a control node that controls communication by the secondary usage node; and

a detection node that detects neighboring secondary systems of the secondary systems,

wherein the control node includes

• • a parameter acquisition unit that acquires parameters to calculate coverage of the secondary systems from the secondary usage node,
  • a calculation unit that calculates the coverage of the secondary systems by using the parameters acquired by the parameter acquisition unit, and
  • an interference control unit that notifies the detection node of coverage information representing the coverage of the secondary systems calculated by the calculation unit.