Patent ID: 7912489

Claim:
A wireless base station comprising: a transmitting and receiving portion configured to receive data frames that are transmitted from a first wireless terminal and destined for another terminal and that are transmitted from a second wireless terminal that is different from the first wireless terminal and destined for another terminal; a storage portion configured to extract identifiers of transmitters from the frames and stores reception information of the data frames and the identifiers; and a processor configured to judge whether or not to stop direct communication between the wireless terminals on the basis of the reception information of the data frames, wherein, in the case of making a judgment of stopping the direct communication, a stop frame for stopping the direct communication with the second wireless terminal is transmitted to the first wireless terminal from the transmitting and receiving portion, the storage portion stores identifiers of authenticated wireless terminals, and in a case where a data frame observed by the transmitting and receiving portion is a direct communication data frame and a transmitter of the direct communication data frame does not accord with any of the identifiers of the authenticated wireless terminals stored in the storage portion, the processor makes a judgment of stopping the direct communication.