An information processing device comprising: a first reception unit that receives first information regarding a first communication device that primarily uses a predetermined frequency band; a setting unit that sets information regarding protection of the first communication device on a basis of the first information; and a calculation unit that calculates a communication parameter related to radio wave transmission of a second communication device (30, 40) that secondarily uses the predetermined frequency band on a basis of the information regarding the protection of the first communication device set by the setting unit; wherein in a case where the first reception unit newly receives the first information, the setting unit updates the information regarding the protection of the first communication device on a basis of the new first information, and the calculation unit updates the communication parameter related to the radio wave transmission of the second communication device (30, 40) on a basis of the updated information regarding the protection of the first communication device; and characterized in that the first information includes information on an installation mode of the first communication device; wherein the information regarding the protection of the first communication device includes information on a range of a protection area related to the first communication device, the information on the installation mode includes information for specifying whether the first communication device is fixed installation or movable installation, in a case where the installation mode of the first communication device is the fixed installation, the setting unit sets, as the range of the protection area related to the first communication device, a range of the protection area that is wider than that in a case where the installation mode of the first communication device is the movable installation. a first reception unit that receives first information regarding a first communication device that primarily uses a predetermined frequency band; a setting unit that sets information regarding protection of the first communication device on a basis of the first information; and a calculation unit that calculates a communication parameter related to radio wave transmission of a second communication device (30, 40) that secondarily uses the predetermined frequency band on a basis of the information regarding the protection of the first communication device set by the setting unit; wherein in a case where the first reception unit newly receives the first information, the setting unit updates the information regarding the protection of the first communication device on a basis of the new first information, and the calculation unit updates the communication parameter related to the radio wave transmission of the second communication device (30, 40) on a basis of the updated information regarding the protection of the first communication device; and characterized in that the first information includes information on an installation mode of the first communication device; wherein the information regarding the protection of the first communication device includes information on a range of a protection area related to the first communication device, the information on the installation mode includes information for specifying whether the first communication device is fixed installation or movable installation, in a case where the installation mode of the first communication device is the fixed installation, the setting unit sets, as the range of the protection area related to the first communication device, a range of the protection area that is wider than that in a case where the installation mode of the first communication device is the movable installation.