| 摘要 |
A communication system, communication method and data processing apparatus for allowing various near communication. NFC communication apparatuses (1 through 3) have two features that they can use two communication modes to communicate and that they can use a plurality of transmission rates to transmit data. The two communication modes may be passive mode and active mode. In the passive mode, between the NFC communication apparatuses (1,2), for example, the NFC communication apparatus (1) modulates its own generated electromagnetic waves, thereby transmitting data to the NFC communication apparatus (2), while the NFC communication apparatus (2) load-modulates the electromagnetic waves generated by the NFC communication apparatus (1), thereby transmitting data to the NFC communication apparatus (1). On the other hand, in the active mode, both of the NFC communication apparatuses (1,2) modulate their own generated electromagnetic waves, thereby transmitting data. The present invention is applicable to, for example, IC card systems or the like. |
