Communication apparatus and wireless communication control method

A communication apparatus comprising:

• an interface configured to access a server for managing usage of a plurality of frequency resources by a first wireless system, which frequency resources have been allocated to the first wireless system, and acquire usage information indicating the usage from the server;
• a storing unit configured to store the acquired usage information;
• and
• a control unit configured to select, based on the usage information, a frequency resource to be used by a second wireless system amongst the frequency resources,
• wherein the control unit determines whether, after the usage information is acquired at a first time point, reacquisition of the usage information at a second time point is successful, the second time point being scheduled to reacquire the usage information from the server, and
• when the reacquisition is unsuccessful, the control unit allows the selecting to be made based on the usage information acquired at the first time point and stored in the storing unit even from the second time point onward.