Diagnosis of operation of plural communicating units

A control device, comprising:

• circuitry configured to:
• control operation of each antenna device of plural antenna devices supported by a casing,
• wherein the plural antenna devices receive radio signals from different directions;
• prioritize a target antenna device among the plural antenna devices to receive, from a base station, a radio signal of the radio signals,
• wherein the radio signal corresponds to a downlink signal;
• control the target antenna device to receive a reference signal from the base station;
• execute, based on the reception of the radio signal and the reference signal by the target antenna device, a process related to diagnosis of the target antenna device,
• wherein the process related to the diagnosis includes measurement of reception strength of the downlink signal;
• determine, based on sub-carrier intervals within which the reference signal is transmitted from the base station, a measurement period for the measurement of the reception strength;
• determine that the target antenna device is operating normally in a case where the reception strength is equal to or higher than a threshold value;
• and
• determine that an abnormality has occurred in the target antenna device in a case where the reception strength is lower than the threshold value.

A control method, comprising:

• controlling operation of each antenna device of plural antenna devices supported by a casing,
• wherein the plural antenna devices receive radio signals from different directions;
• prioritizing a target antenna device among the plural antenna devices to receive, from a base station, a radio signal of the radio signals,
• wherein the radio signal corresponds to a downlink signal;
• controlling the target antenna device to receive a reference signal from the base station;
• executing, based on the reception of the radio signal and the reference signal by the target antenna device, a process related to diagnosis of the target antenna device,
• wherein the process related to the diagnosis includes measuring reception strength of the downlink signal;
• determining, based on sub-carrier intervals within which the reference signal is transmitted from the base station, a measurement period of the measurement of the reception strength;
• determining that the target antenna device is operating normally in a case where the reception strength is equal to or higher than a threshold value;
• and
• determining that an abnormality has occurred in the target antenna device in a case where the reception strength is lower than the threshold value.