The communications device of the present invention performs an authentication with the device at the other end automatically or through a simple operation, independently of an authentication scheme supported by the device at the other end. A communications device includes: a connecting section for establishing a connection with the other communications device according to the IrSimple scheme; an authentication section for performing an authentication by the IrSimple scheme; a connecting section for establishing a connection with the other communications device according to the IrDA scheme, an authentication section for performing an authentication according to the IrDA scheme; and a protocol switching section for causing the connecting section to initiate a connection and causing the authentication section to perform an authentication, when an authentication by the authentication section is unsuccessful. This makes it possible to switch to a protocol of the IrDA scheme and perform communications according to the IrDA scheme when the other communications device does not support device authentication of the IrSimple scheme although being compliant with the IrSimple scheme.

Communications device, communications method, communications program, and computer-readable storage medium storing the communications program

A plurality of connection frames are transmitted which differ from each other in at least either modulation scheme or transfer rate. Accordingly, a receiving-end device can properly receive a connection frame even in an environment where the connection frame is likely to be affected by noise.

Data transmitting device, data transmitting method, data transmitting and receiving system, data transmitting computer program and stroage medium therefor, data receiving device, data receiving method, and data receiving computer program and storage medium therefor

PROBLEM TO BE SOLVED: To provide an infrared communication device capable of suitably performing reception, even when a plurality of communication devices are to perform transmission. SOLUTION: Transmission timing is determined by a transmission timing determination section 44 based on a pseudo random number generated by a random number generation section 42, and a packet is transmitted by a transmission control section 52 based on the transmission timing determined, whereby a case where data cannot be received due to interference of an infrared signal, or the like can be reduced, when communication ranges of a plurality of transmission terminals 12 overlap one another. COPYRIGHT: (C)2011,JPO&INPIT

Infrared ID communication device

Sharing a session key between devices

The present application discloses a point-to-point infrared communication method and system. The method comprises: acquiring, by an infrared transmitting end, information data to be transmitted; determining, according to a preconfigured check method, a check code of the information data; and compiling, according to a preconfigured frame information format, the information data and the check code into a soft coding frame and transmitting the soft coding frame out; receiving, by an infrared receiving end, the soft coding frame transmitted by the infrared transmitting end; when the infrared receiving end receives a start bit, starting reception of the information data and the check code of the current soft coding frame; and when the infrared receiving end receives an end bit, stopping the reception of the current soft coding frame; checking, according to the check code and a preconfigured check method, whether the received information data is correct; if the received information data is correct, performing, according to the received information data, a processing operation; and if the received information data is not correct, discarding the current soft coding frame information. By using the described method, the embodiment of the present application can achieve infrared high-speed communication and ensure the reliability of data transmission.

Point-to-point infrared communication method and system

An infrared communication apparatus and an infrared communication method for enabling data communication with a receiving apparatus regardless of a protocol that can be supported by the receiving apparatus. There are included a transmitting part (100) that transmits, to a receiving apparatus (2), a first packet for inquiring whether a first protocol can be supported and a second packet for inquiring whether a second protocol can be supported at least once and thereafter transmits thereto a plurality of third packets for inquiring whether a third protocol can be supported; a receiving part (104) that receives, from the receiving apparatus (2) having received the first packet, second packet and plurality of third packets, a response packet indicative of a protocol that can be supported by the receiving apparatus (2); and a data transmitting part (106) that transmits, based on the protocol indicated by the response packet received by the receiving part (104), data to the receiving apparatus (2).

Masaharu Nakatsuchi

Papers

Infrared communication apparatus and infrared communication method