Abstract: To prevent an increase in a circuit configuration that is used for a case in which when a header is incorrect under a specific condition, a correctly-received payload is kept and only the header is resent. A USB device according to the present disclosure includes a first processing unit configured to, when a predetermined error is included in a first header of a first packet received from a host apparatus, discard the first header and transmit a first payload of the first packet to a subsequent stage, and a second processing unit configured to discard the first payload received from the first processing unit and transmit a first packet resending request to the host apparatus.

Abstract: To prevent an increase in a circuit configuration that is used for a case in which when a header is incorrect under a specific condition, a correctly-received payload is kept and only the header is resent. A USB device according to the present disclosure includes a first processing unit configured to, when a predetermined error is included in a first header of a first packet received from a host apparatus, discard the first header and transmit a first payload of the first packet to a subsequent stage, and a second processing unit configured to discard the first payload received from the first processing unit and transmit a first packet resending request to the host apparatus.

Abstract: A proxy content server responds to a request message from a user terminal by determining whether the message is a registration request or a content request. If the message is a registration request, the proxy content server maps the user terminal to a registered content server in a memory. If the message is a content request for requesting a content from a server, the proxy content server requests it to send content data to the user terminal if the content server is registered in the memory and the user terminal is mapped to the registered content server. If the user terminal is not mapped to the requested server, the user is not entitled to access the requested server and informed of this fact.

Abstract: Data transmitted from a data transmission server 1 to a certain user arrives at a network gateway 2 via an internet 100, and is received in an arrived data receiving means 31 of an arrived data dealing function part 3 provided in the inside. Then, a data arrival information determining means 32 determines the data arrival information type on the basis of the type of terminal of the pertinent user as stored in an individual user terminal type memory 33, a data arrival information editing means 34 edits data arrival information on the basis of the data received by the received data and data arrival information type, and a data arrival information transmitting means 35 transmits data arrival information to the terminal used by the user. The transmitted data arrival information arrives at a user terminal 4 via a radio network 200.