Abstract:
A controller receives first or second equipment identifier from a first wireless communication apparatus, by using one wireless communication circuit of the third and fourth wireless communication circuit. When the one wireless communication circuit is the fourth wireless communication circuit, the controller sets an encryption key information for wireless communications with the first wireless communication apparatus, to encryption key information including an equipment identifier that does not coincide with a received equipment identifier among the received plurality of encryption key information, and controls the third wireless communication circuit to transmit and receive encrypted transmission data to and from the first wireless communication apparatus by using key data included in set encryption key information.
Abstract:
A first electrical device includes: a second radio signal receiver that receives target device information; a second processor that determines whether or not the first electrical device is included in the target device information and the first electrical device is connected to a network or whether or not a second electrical device capable of communicating with the first electrical device is included in the target device information and the second electrical device capable of communicating with the first electrical device is connected to the network; and a transmitter that, when a result of the determination by the second processor indicates that the first electrical device or the second electrical device is included in the target device information, transmits information indicating that the first electrical device or the second electrical device is the search-target device, as a response using a communication method based on the result of the determination.
Abstract:
A first communication device stores a transmission rate table including response times, and transmission rates associated with the response times, each first response time indicating a time for transmitting test data between the first and second communication devices, while transmitting load data between any pair of communication devices at one of different transmission rates. The first communication device determine a necessary transmission rate for actual data; detect a response time indicating a time for transmitting the test data between the first and second communication devices; determine a transmission rate associated with the response time, as a used transmission rate, based on the transmission rate table; determine an effective remaining transmission rate based on a maximum transmission rate of the communication network and the used transmission rate; and start transmission of the actual data when the effective remaining transmission rate is higher than the necessary transmission rate.