Abstract: Installation (wired connection) of a function expansion device in a portable information terminal is detected. This detection causes a connection authentication code to be generated. The generated connection authentication code is stored in each of the portable information terminal and the function expansion device via a wire circuit so as to be used for authentication for wireless connection.

Abstract: Data communication using wireless service discovery is continuously provided even if a radio wave condition temporarily deteriorates or movement of an apparatus occurs. If a temporary deterioration in wireless radio wave environment is found in a communication apparatus including a service discovery function, a search is made again at a raised transmission power. Forcible disconnection processing from a higher-level layer is prevented when communication at the network layer level is continuing.

Abstract: A terminal determined to be a communication partner in advance is subjected to transmission power control, and another terminal receives data with the maximum transmission power. Data to be transmitted to a plurality of terminals is also transmitted with the maximum transmission power.

Abstract: According to this invention, a wireless communication equipment which communicates with a plurality of nodes supplies an access control technique for improving communication efficiency. For this purpose, a wireless communication equipment is connected to a plurality of networks, and includes a communication unit which sequentially communicates, at a predetermined interval, with devices included in the plurality of network, a determination unit which determinates a communication control parameter of each of the devices when a connection network count changes, a notification unit which notifies the device in the network of the communication control parameter determined by the determination unit, and a communication control unit which controls the communication unit in accordance with the communication control parameter notified by the notification unit.

Abstract: A communication device selects image data to be transmitted to a public network from image data stored in an imaging device, inputs a character string, converts the file name of image data received from the imaging device into the input character string, and transmits the image data to the public network. Upon reception of a request for image data from the public network, the communication device converts the file name of the requested image data into the file name received from the imaging device, and requests transmission of the image data from the imaging device.

Abstract: Installation (wired connection) of a function expansion device in a portable information terminal is detected. This detection causes a connection authentication code to be generated. The generated connection authentication code is stored in each of the portable information terminal and the function expansion device via a wire circuit so as to be used for authentication for wireless connection.

Abstract: A communication device selects image data to be transmitted to a public network from image data stored in an imaging device, inputs a character string, converts the file name of image data received from the imaging device into the input character string, and transmits the image data to the public network. Upon reception of a request for image data from the public network, the communication device converts the file name of the requested image data into the file name received from the imaging device, and requests transmission of the image data from the imaging device.